:root {
    --primary: #2980FE;
    --primary-dark: #1768d7;
    --primary-soft: #edf5ff;
    --primary-softer: #f6faff;
    --white: #ffffff;
    --gray-50: #f7f9fc;
    --gray-100: #eef2f7;
    --gray-200: #dde5ef;
    --gray-500: #6b7280;
    --gray-700: #374151;
    --gray-900: #111827;
    --radius-lg: 22px;
    --radius-md: 16px;
    --shadow-soft: 0 14px 45px rgba(31, 73, 125, 0.08);
    --shadow-card: 0 10px 28px rgba(17, 24, 39, 0.06);
    --container: 1180px;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
    color: var(--gray-900);
    background: linear-gradient(180deg, #ffffff 0%, #f7fbff 42%, #ffffff 100%);
    line-height: 1.7;
    overflow-x: hidden;
}

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

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

p {
    margin: 0 0 14px;
    color: var(--gray-700);
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(255,255,255,0.92);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--gray-100);
}

.header-inner {
    max-width: var(--container);
    margin: 0 auto;
    padding: 14px 18px;
    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(--gray-900);
    letter-spacing: -0.02em;
}

.logo img {
    width: 36px;
    height: 36px;
    object-fit: contain;
    border-radius: 10px;
}

.site-nav {
    position: absolute;
    top: 66px;
    left: 12px;
    right: 12px;
    display: none;
    flex-direction: column;
    gap: 6px;
    padding: 14px;
    background: var(--white);
    border: 1px solid var(--gray-100);
    border-radius: 18px;
    box-shadow: var(--shadow-card);
}

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

.site-nav a {
    padding: 10px 12px;
    border-radius: 12px;
    color: var(--gray-700);
    font-size: 15px;
}

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

.nav-toggle {
    width: 42px;
    height: 42px;
    border: 1px solid var(--gray-100);
    background: var(--white);
    border-radius: 14px;
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
}

.nav-toggle span {
    width: 18px;
    height: 2px;
    background: var(--gray-900);
    border-radius: 99px;
}

.container,
.hero-inner,
.section-inner,
.footer-inner {
    max-width: var(--container);
    margin: 0 auto;
    padding-left: 18px;
    padding-right: 18px;
}

.product-hero {
    position: relative;
    padding: 48px 0 34px;
    overflow: hidden;
    background:
        radial-gradient(circle at top right, rgba(41,128,254,0.16), transparent 34%),
        linear-gradient(180deg, var(--white), var(--primary-softer));
}

.product-hero::after {
    content: "";
    position: absolute;
    width: 360px;
    height: 360px;
    right: -160px;
    bottom: -180px;
    background: rgba(41,128,254,0.09);
    border-radius: 50%;
}

.hero-inner {
    position: relative;
    z-index: 1;
    display: grid;
    gap: 34px;
    align-items: center;
}

.eyebrow,
.badge {
    display: inline-flex;
    align-items: center;
    width: fit-content;
    padding: 7px 12px;
    border-radius: 999px;
    background: var(--primary-soft);
    color: var(--primary);
    font-size: 13px;
    font-weight: 700;
}

.hero-copy h1,
.page-hero h1 {
    margin: 16px 0 16px;
    font-size: clamp(34px, 8vw, 64px);
    line-height: 1.08;
    letter-spacing: -0.05em;
    color: var(--gray-900);
}

.hero-copy p {
    font-size: 17px;
    color: var(--gray-700);
    max-width: 650px;
}

.download-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 13px 24px;
    border-radius: 999px;
    background: var(--primary);
    color: var(--white);
    font-weight: 800;
    box-shadow: 0 12px 30px rgba(41,128,254,0.24);
    border: 1px solid rgba(255,255,255,0.3);
    transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}

.download-btn:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: 0 16px 34px rgba(41,128,254,0.28);
}

.hero-actions {
    display: flex;
    align-items: center;
    gap: 14px;
    flex-wrap: wrap;
    margin: 26px 0 18px;
}

.trust-tags,
.tag-row {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.trust-tags span,
.tag-row span {
    padding: 8px 11px;
    border: 1px solid var(--gray-100);
    background: rgba(255,255,255,0.76);
    border-radius: 999px;
    color: var(--gray-700);
    font-size: 13px;
}

.app-visual {
    position: relative;
    min-height: 390px;
    border-radius: 28px;
    padding: 24px;
    background: linear-gradient(145deg, #ffffff 0%, #eef6ff 100%);
    box-shadow: var(--shadow-soft);
    border: 1px solid rgba(41,128,254,0.12);
    display: grid;
    place-items: center;
}

.app-visual img {
    max-height: 420px;
    object-fit: contain;
    filter: drop-shadow(0 20px 35px rgba(25, 62, 110, .12));
}

.float-card {
    position: absolute;
    padding: 10px 13px;
    border-radius: 14px;
    background: rgba(255,255,255,0.92);
    border: 1px solid var(--gray-100);
    box-shadow: var(--shadow-card);
    font-size: 13px;
    color: var(--gray-700);
}

.float-card strong {
    display: block;
    color: var(--gray-900);
}

.float-asset { left: 18px; top: 28px; }
.float-cold { right: 18px; top: 92px; }
.float-swap { left: 22px; bottom: 48px; }
.float-dapp { right: 24px; bottom: 28px; }

.section {
    padding: 54px 0;
}

.section-soft {
    background: linear-gradient(180deg, var(--primary-softer), #ffffff);
}

.section-header {
    max-width: 760px;
    margin: 0 auto 28px;
    text-align: center;
}

.section-header.left {
    margin-left: 0;
    text-align: left;
}

.section-header h2,
.product-copy h2,
.cta-section h2 {
    margin: 0 0 12px;
    font-size: clamp(26px, 5vw, 42px);
    line-height: 1.18;
    letter-spacing: -0.04em;
}

.section-header p {
    font-size: 16px;
}

.feature-shortcuts,
.category-grid,
.risk-grid,
.faq-grid,
.info-grid,
.card-grid {
    display: grid;
    gap: 14px;
}

.feature-shortcuts {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.shortcut-card,
.feature-card,
.category-card,
.risk-card,
.faq-item,
.info-card,
.aside-card,
.step-card,
.download-step {
    background: var(--white);
    border: 1px solid var(--gray-100);
    border-radius: var(--radius-md);
    padding: 18px;
    box-shadow: var(--shadow-card);
}

.shortcut-card {
    min-height: 152px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

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

.shortcut-card h3,
.category-card h3,
.risk-card h3,
.faq-item h3,
.info-card h3,
.step-card h3,
.download-step h3 {
    margin: 0 0 8px;
    font-size: 18px;
}

.shortcut-card p,
.category-card p,
.risk-card p,
.faq-item p,
.info-card p,
.step-card p,
.download-step p {
    font-size: 14px;
    color: var(--gray-500);
    margin-bottom: 10px;
}

.card-link {
    margin-top: auto;
    color: var(--primary);
    font-weight: 800;
    font-size: 14px;
}

.product-section {
    display: grid;
    gap: 26px;
    align-items: center;
}

.product-section.reverse .product-media {
    order: -1;
}

.product-media {
    border-radius: 28px;
    padding: 18px;
    background: linear-gradient(145deg, #f8fbff, #ffffff);
    border: 1px solid var(--gray-100);
    box-shadow: var(--shadow-soft);
}

.product-media img {
    margin: 0 auto;
    max-height: 390px;
    object-fit: contain;
}

.product-copy .badge {
    margin-bottom: 12px;
}

.check-list,
.clean-list,
.faq-list {
    list-style: none;
    padding: 0;
    margin: 18px 0 0;
    display: grid;
    gap: 10px;
}

.check-list li,
.clean-list li,
.faq-list li {
    position: relative;
    padding-left: 28px;
    color: var(--gray-700);
}

.check-list li::before,
.clean-list li::before {
    content: "✓";
    position: absolute;
    left: 0;
    top: 0;
    color: var(--primary);
    font-weight: 900;
}

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

.step-card {
    position: relative;
    overflow: hidden;
}

.step-card::before {
    counter-increment: step;
    content: counter(step);
    display: grid;
    place-items: center;
    width: 38px;
    height: 38px;
    margin-bottom: 14px;
    border-radius: 14px;
    background: var(--primary);
    color: var(--white);
    font-weight: 900;
}

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

.risk-card .suggest {
    display: block;
    padding: 10px 12px;
    background: var(--primary-softer);
    border-radius: 12px;
    color: var(--gray-700);
    font-size: 14px;
    margin: 12px 0;
}

.category-grid {
    grid-template-columns: 1fr;
}

.category-card {
    background:
        linear-gradient(135deg, rgba(41,128,254,0.06), rgba(255,255,255,0) 42%),
        var(--white);
}

.faq-item {
    box-shadow: none;
}

.cta-section {
    margin: 28px auto 0;
    border-radius: 30px;
    padding: 34px 20px;
    text-align: center;
    background:
        radial-gradient(circle at 18% 10%, rgba(41,128,254,.16), transparent 28%),
        linear-gradient(135deg, #ffffff, #eef6ff);
    border: 1px solid rgba(41,128,254,.12);
    box-shadow: var(--shadow-soft);
}

.cta-section p {
    max-width: 720px;
    margin: 0 auto 20px;
}

.page-hero {
    padding: 48px 0 28px;
    background:
        radial-gradient(circle at top right, rgba(41,128,254,.14), transparent 32%),
        linear-gradient(180deg, #ffffff, #f6faff);
    border-bottom: 1px solid var(--gray-100);
}

.page-hero .container {
    display: grid;
    gap: 16px;
}

.page-hero p {
    max-width: 820px;
    font-size: 17px;
}

.article-shell {
    padding: 48px 0;
}

.content-layout {
    display: grid;
    gap: 22px;
}

.article-main {
    display: grid;
    gap: 18px;
}

.article-panel {
    background: var(--white);
    border: 1px solid var(--gray-100);
    border-radius: var(--radius-lg);
    padding: 22px;
    box-shadow: var(--shadow-card);
}

.article-panel h2 {
    margin: 0 0 12px;
    font-size: 25px;
    letter-spacing: -0.02em;
}

.tip-box {
    padding: 16px;
    border-radius: var(--radius-md);
    background: var(--primary-softer);
    border: 1px solid rgba(41,128,254,.14);
    color: var(--gray-700);
}

.aside-stack {
    display: grid;
    gap: 16px;
    align-content: start;
}

.aside-card h3 {
    margin: 0 0 10px;
}

.aside-card a {
    display: block;
    padding: 8px 0;
    color: var(--primary);
    font-weight: 700;
    border-bottom: 1px solid var(--gray-100);
}

.aside-card a:last-child {
    border-bottom: 0;
}

.download-hero-card {
    border-radius: 28px;
    background: var(--white);
    border: 1px solid var(--gray-100);
    box-shadow: var(--shadow-soft);
    padding: 24px;
}

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

.download-step .num {
    width: 34px;
    height: 34px;
    display: inline-grid;
    place-items: center;
    border-radius: 12px;
    background: var(--primary);
    color: var(--white);
    font-weight: 900;
    margin-bottom: 10px;
}

.about-values {
    display: grid;
    gap: 16px;
}

.site-footer {
    background: #f5f8fc;
    border-top: 1px solid var(--gray-100);
    padding: 42px 0 0;
}

.footer-inner {
    display: grid;
    gap: 28px;
}

.footer-brand p {
    max-width: 430px;
    margin-top: 14px;
}

.footer-links {
    display: grid;
    gap: 18px;
}

.footer-links h3 {
    margin: 0 0 10px;
    font-size: 16px;
}

.footer-links a {
    display: block;
    color: var(--gray-500);
    padding: 5px 0;
    font-size: 14px;
}

.footer-links a:hover {
    color: var(--primary);
}

.footer-bottom {
    margin-top: 30px;
    border-top: 1px solid var(--gray-200);
    padding: 16px 18px;
    text-align: center;
}

.footer-bottom p {
    margin: 0;
    font-size: 13px;
    color: var(--gray-500);
}

@media (min-width: 640px) {
    .feature-shortcuts {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .category-grid,
    .risk-grid,
    .info-grid,
    .card-grid,
    .faq-grid,
    .download-steps {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .process-steps {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (min-width: 900px) {
    .nav-toggle {
        display: none;
    }

    .site-nav {
        position: static;
        display: flex;
        flex-direction: row;
        gap: 4px;
        padding: 0;
        border: 0;
        box-shadow: none;
        background: transparent;
    }

    .site-nav a {
        font-size: 14px;
        padding: 9px 10px;
    }

    .product-hero {
        padding: 76px 0 52px;
    }

    .hero-inner {
        grid-template-columns: minmax(0, 1.05fr) minmax(380px, .95fr);
        gap: 46px;
    }

    .feature-shortcuts {
        grid-template-columns: repeat(6, minmax(0, 1fr));
    }

    .product-section {
        grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
        gap: 54px;
    }

    .product-section.reverse .product-media {
        order: 2;
    }

    .category-grid {
        grid-template-columns: repeat(4, minmax(0, 1fr));
    }

    .risk-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .process-steps {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .content-layout {
        grid-template-columns: minmax(0, 1fr) 320px;
        gap: 30px;
        align-items: start;
    }

    .footer-inner {
        grid-template-columns: 1fr 1.5fr;
    }

    .footer-links {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .about-values {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
}

@media (min-width: 1120px) {
    .site-nav a {
        padding-left: 13px;
        padding-right: 13px;
    }

    .section {
        padding: 72px 0;
    }

    .article-panel {
        padding: 28px;
    }
}

@media (max-width: 420px) {
    .feature-shortcuts {
        grid-template-columns: 1fr;
    }

    .hero-actions {
        align-items: stretch;
    }

    .download-btn {
        width: 100%;
    }

    .float-card {
        display: none;
    }

    .app-visual {
        min-height: 300px;
    }
}