* {
    box-sizing: border-box;
}

:root {
    --primary: #2980FE;
    --primary-dark: #1767d8;
    --primary-soft: #eef6ff;
    --primary-softer: #f6faff;
    --white: #ffffff;
    --gray-50: #f8fafc;
    --gray-100: #eef2f7;
    --gray-200: #dbe3ee;
    --gray-500: #64748b;
    --gray-700: #334155;
    --gray-900: #111827;
    --radius-lg: 18px;
    --radius-xl: 26px;
    --shadow-soft: 0 18px 45px rgba(15, 23, 42, 0.08);
    --shadow-card: 0 10px 28px rgba(41, 128, 254, 0.08);
}

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-700);
    background: linear-gradient(180deg, #ffffff 0%, #f7fbff 42%, #ffffff 100%);
    line-height: 1.72;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

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

a {
    color: var(--primary);
    text-decoration: none;
}

a:hover {
    color: var(--primary-dark);
}

.container {
    width: min(100% - 32px, 1180px);
    margin: 0 auto;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(18px);
    border-bottom: 1px solid rgba(219, 227, 238, 0.8);
}

.nav-wrap {
    min-height: 70px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
}

.brand,
.footer-brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    color: var(--gray-900);
    font-weight: 800;
    letter-spacing: 0.02em;
}

.brand-logo,
.footer-logo {
    width: 38px;
    height: 38px;
    object-fit: contain;
    border-radius: 11px;
}

.brand-text {
    font-size: 18px;
}

.desktop-nav {
    display: none;
    align-items: center;
    gap: 4px;
}

.desktop-nav a {
    color: var(--gray-700);
    padding: 9px 12px;
    border-radius: 999px;
    font-size: 14px;
    font-weight: 600;
}

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

.mobile-menu-toggle {
    border: 1px solid var(--gray-200);
    background: var(--white);
    color: var(--gray-700);
    border-radius: 999px;
    padding: 9px 14px;
    font-weight: 700;
}

.mobile-nav {
    display: none;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
    padding: 0 16px 16px;
    background: var(--white);
    border-top: 1px solid var(--gray-100);
}

.mobile-nav.open {
    display: grid;
}

.mobile-nav a {
    background: var(--gray-50);
    border: 1px solid var(--gray-100);
    border-radius: 14px;
    padding: 11px 12px;
    color: var(--gray-700);
    font-weight: 650;
}

.section,
.product-hero,
.page-hero,
.cta-section {
    padding: 58px 0;
}

.gradient-bg {
    background:
        radial-gradient(circle at top right, rgba(41, 128, 254, 0.18), transparent 34%),
        linear-gradient(135deg, #ffffff 0%, #f2f7ff 100%);
}

.product-hero {
    position: relative;
    overflow: hidden;
}

.product-hero::after {
    content: "";
    position: absolute;
    width: 280px;
    height: 280px;
    right: -140px;
    bottom: -120px;
    border-radius: 50%;
    background: rgba(41, 128, 254, 0.12);
}

.hero-grid,
.split-section,
.article-layout,
.download-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 32px;
    align-items: center;
}

.eyebrow,
.category-badge,
.tag-pill {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    width: fit-content;
    color: var(--primary);
    background: var(--primary-soft);
    border: 1px solid rgba(41, 128, 254, 0.15);
    border-radius: 999px;
    padding: 6px 12px;
    font-size: 13px;
    font-weight: 750;
}

h1,
h2,
h3 {
    color: var(--gray-900);
    line-height: 1.2;
    margin: 0;
}

h1 {
    font-size: clamp(34px, 9vw, 64px);
    letter-spacing: -0.045em;
    margin-top: 18px;
}

.page-hero h1 {
    font-size: clamp(32px, 8vw, 54px);
}

h2 {
    font-size: clamp(26px, 6vw, 42px);
    letter-spacing: -0.032em;
}

h3 {
    font-size: 20px;
}

.lead {
    font-size: 17px;
    color: var(--gray-500);
    margin: 18px 0 24px;
    max-width: 720px;
}

.hero-actions,
.inline-actions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 14px;
}

.download-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 0 24px;
    border-radius: 999px;
    background: var(--primary);
    color: var(--white);
    font-weight: 800;
    box-shadow: 0 14px 26px rgba(41, 128, 254, 0.24);
    border: 1px solid var(--primary);
    transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.download-btn:hover {
    color: var(--white);
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: 0 16px 32px rgba(41, 128, 254, 0.3);
}

.hero-tags,
.safe-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 22px;
}

.hero-visual {
    position: relative;
    background: linear-gradient(145deg, rgba(255,255,255,0.86), rgba(239,246,255,0.95));
    border: 1px solid rgba(219, 227, 238, 0.9);
    border-radius: 32px;
    padding: 24px;
    box-shadow: var(--shadow-soft);
    min-height: 430px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-phone {
    max-height: 520px;
    margin: 0 auto;
    filter: drop-shadow(0 24px 40px rgba(15, 23, 42, 0.14));
}

.float-card,
.asset-status-card {
    position: absolute;
    background: rgba(255, 255, 255, 0.92);
    border: 1px solid rgba(219, 227, 238, 0.95);
    border-radius: 20px;
    padding: 13px 15px;
    box-shadow: var(--shadow-card);
    font-size: 13px;
    color: var(--gray-500);
}

.float-card strong,
.asset-status-card strong {
    display: block;
    color: var(--gray-900);
    font-size: 15px;
}

.asset-status-card {
    top: 22px;
    left: 18px;
}

.float-card.one { right: 16px; top: 28%; }
.float-card.two { left: 18px; bottom: 28%; }
.float-card.three { right: 18px; bottom: 22px; }

.section-heading {
    margin-bottom: 24px;
}

.section-heading p {
    color: var(--gray-500);
    max-width: 760px;
}

.feature-shortcuts,
.category-grid,
.risk-grid,
.card-grid,
.quick-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
}

.shortcut-card,
.feature-card,
.category-card,
.risk-card,
.faq-item,
.content-card,
.tip-box,
.side-panel,
.step-card,
.about-card,
.download-card {
    background: var(--white);
    border: 1px solid var(--gray-100);
    border-radius: var(--radius-lg);
    padding: 20px;
    box-shadow: 0 8px 24px rgba(15, 23, 42, 0.04);
}

.shortcut-card,
.category-card {
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.shortcut-card:hover,
.category-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-card);
    border-color: rgba(41, 128, 254, 0.24);
}

.card-icon {
    width: 38px;
    height: 38px;
    display: inline-grid;
    place-items: center;
    color: var(--primary);
    background: var(--primary-soft);
    border-radius: 13px;
    font-weight: 900;
    margin-bottom: 12px;
}

.card-link {
    display: inline-flex;
    margin-top: 8px;
    font-weight: 800;
}

.product-panel,
.visual-panel {
    background: var(--white);
    border: 1px solid var(--gray-100);
    border-radius: 28px;
    padding: 22px;
    box-shadow: var(--shadow-soft);
}

.image-frame {
    border-radius: 24px;
    overflow: hidden;
    background: linear-gradient(180deg, #f8fbff, #eef6ff);
    border: 1px solid var(--gray-100);
    padding: 18px;
}

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

.feature-list li,
.check-list li,
.clean-list li {
    position: relative;
    padding-left: 24px;
    color: var(--gray-700);
}

.feature-list li::before,
.check-list li::before,
.clean-list li::before {
    content: "";
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--primary);
    position: absolute;
    left: 0;
    top: 12px;
}

.cold-wallet-section {
    background: var(--primary-softer);
}

.swap-section {
    background: linear-gradient(180deg, #ffffff 0%, #f8fbff 100%);
}

.dapp-section {
    background: var(--white);
}

.process-steps {
    display: grid;
    grid-template-columns: 1fr;
    gap: 14px;
    counter-reset: step;
}

.step-card {
    position: relative;
    padding-left: 72px;
}

.step-number {
    position: absolute;
    left: 20px;
    top: 22px;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: grid;
    place-items: center;
    background: var(--primary);
    color: var(--white);
    font-weight: 900;
}

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

.risk-card span {
    display: block;
    color: var(--gray-500);
    font-size: 14px;
    margin-top: 8px;
}

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

.faq-item h3 {
    margin-bottom: 8px;
}

.cta-section {
    background: linear-gradient(135deg, #f1f7ff 0%, #ffffff 100%);
    text-align: center;
}

.cta-section p {
    max-width: 700px;
    margin: 16px auto 24px;
    color: var(--gray-500);
}

.page-hero {
    background:
        radial-gradient(circle at top left, rgba(41, 128, 254, 0.18), transparent 28%),
        linear-gradient(180deg, #ffffff 0%, #f5f9ff 100%);
}

.page-summary {
    color: var(--gray-500);
    max-width: 820px;
    margin: 18px 0 0;
    font-size: 17px;
}

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

.article-main p {
    margin: 0;
}

.side-panel {
    align-self: start;
    background: var(--primary-softer);
}

.tip-box {
    background: #fbfdff;
}

.tip-box strong {
    color: var(--gray-900);
}

.check-panel {
    display: grid;
    gap: 14px;
}

.info-strip {
    display: grid;
    gap: 14px;
    margin-top: 20px;
}

.info-strip div {
    background: var(--gray-50);
    border: 1px solid var(--gray-100);
    border-radius: 16px;
    padding: 16px;
}

.download-card {
    text-align: center;
    background: linear-gradient(135deg, var(--primary-softer), #ffffff);
}

.download-card .download-btn {
    margin-top: 12px;
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
}

.site-footer {
    background: #f7f9fc;
    border-top: 1px solid var(--gray-100);
    padding: 42px 0 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 26px;
}

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

.footer-grid a {
    display: block;
    color: var(--gray-500);
    margin: 7px 0;
}

.footer-grid p {
    color: var(--gray-500);
    margin: 12px 0 0;
}

.footer-bottom {
    display: flex;
    flex-direction: column;
    gap: 8px;
    color: var(--gray-500);
    border-top: 1px solid var(--gray-100);
    padding: 18px 0;
    margin-top: 28px;
    font-size: 14px;
}

@media (min-width: 640px) {
    .feature-shortcuts,
    .category-grid,
    .risk-grid,
    .card-grid,
    .quick-grid,
    .about-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

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

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

@media (min-width: 900px) {
    .mobile-menu-toggle,
    .mobile-nav {
        display: none !important;
    }

    .desktop-nav {
        display: flex;
    }

    .section,
    .product-hero,
    .page-hero,
    .cta-section {
        padding: 86px 0;
    }

    .hero-grid,
    .split-section,
    .download-grid {
        grid-template-columns: 1.05fr 0.95fr;
        gap: 52px;
    }

    .split-section.reverse {
        grid-template-columns: 0.95fr 1.05fr;
    }

    .split-section.reverse .visual-panel {
        order: -1;
    }

    .article-layout {
        grid-template-columns: minmax(0, 1fr) 330px;
        align-items: start;
    }

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

    .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));
    }

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

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

    .footer-bottom {
        flex-direction: row;
        justify-content: space-between;
    }
}

@media (min-width: 1120px) {
    .card-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
}

@media (max-width: 420px) {
    .container {
        width: min(100% - 24px, 1180px);
    }

    .hero-visual {
        min-height: 360px;
        padding: 16px;
    }

    .float-card,
    .asset-status-card {
        position: static;
        margin: 8px auto 0;
        width: 100%;
    }

    .hero-visual {
        display: block;
    }

    .download-btn {
        width: 100%;
    }
}