:root {
    --primary: #2980FE;
    --primary-dark: #1762d6;
    --primary-soft: #edf5ff;
    --primary-pale: #f5f9ff;
    --white: #ffffff;
    --gray-50: #f8fafc;
    --gray-100: #eef2f7;
    --gray-200: #e5eaf2;
    --gray-500: #667085;
    --gray-700: #344054;
    --gray-900: #101828;
    --line: #d9e2ef;
    --shadow: 0 18px 50px rgba(16, 24, 40, 0.08);
    --radius: 22px;
    --container: 1180px;
}

* {
    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(--gray-900);
    background: linear-gradient(180deg, #ffffff 0%, #f6f9ff 44%, #ffffff 100%);
    line-height: 1.75;
    overflow-x: hidden;
}

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

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

.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(255, 255, 255, 0.94);
    border-bottom: 1px solid var(--gray-200);
    backdrop-filter: blur(14px);
}

.header-inner {
    width: min(100% - 32px, var(--container));
    margin: 0 auto;
    min-height: 68px;
    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;
}

.nav-toggle {
    width: 42px;
    height: 42px;
    border: 1px solid var(--gray-200);
    border-radius: 14px;
    background: var(--white);
    color: var(--gray-900);
    font-size: 22px;
    cursor: pointer;
}

.site-nav {
    position: absolute;
    top: 68px;
    left: 16px;
    right: 16px;
    display: none;
    flex-direction: column;
    gap: 4px;
    padding: 14px;
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: 18px;
    box-shadow: var(--shadow);
}

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

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

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

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

.section {
    padding: 56px 0;
}

.section-muted {
    background: linear-gradient(180deg, #f7fbff 0%, #ffffff 100%);
}

.section-head {
    max-width: 760px;
    margin-bottom: 26px;
}

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

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

h1, h2, h3 {
    margin: 0 0 14px;
    color: var(--gray-900);
    line-height: 1.22;
    letter-spacing: -0.03em;
}

h1 {
    font-size: clamp(34px, 9vw, 60px);
}

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

h3 {
    font-size: 20px;
}

p {
    margin: 0 0 16px;
    color: var(--gray-500);
}

.product-hero {
    position: relative;
    overflow: hidden;
    padding: 54px 0 46px;
    background:
        radial-gradient(circle at 80% 10%, rgba(41, 128, 254, 0.18), transparent 32%),
        linear-gradient(135deg, #ffffff 0%, #f1f7ff 100%);
}

.product-hero::before {
    content: "";
    position: absolute;
    width: 340px;
    height: 340px;
    border-radius: 999px;
    background: rgba(41, 128, 254, 0.10);
    left: -170px;
    top: 60px;
}

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

.hero-copy p {
    font-size: 17px;
    max-width: 680px;
}

.hero-actions {
    margin: 26px 0 18px;
}

.download-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 13px 24px;
    background: var(--primary);
    color: var(--white);
    border-radius: 999px;
    font-weight: 800;
    box-shadow: 0 14px 28px rgba(41, 128, 254, 0.26);
    border: 0;
    cursor: pointer;
    transition: transform 0.2s ease, background 0.2s ease, box-shadow 0.2s ease;
}

.download-btn:hover {
    transform: translateY(-2px);
    background: var(--primary-dark);
    box-shadow: 0 18px 32px rgba(41, 128, 254, 0.32);
}

.safety-tags,
.pill-row {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 18px;
}

.safety-tags span,
.pill-row span {
    display: inline-flex;
    align-items: center;
    padding: 8px 12px;
    border: 1px solid var(--line);
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.8);
    color: var(--gray-700);
    font-size: 13px;
    font-weight: 650;
}

.app-visual {
    position: relative;
    display: grid;
    justify-items: center;
    min-height: 420px;
}

.phone-frame {
    width: min(82vw, 330px);
    padding: 14px;
    border-radius: 34px;
    background: linear-gradient(180deg, #ffffff 0%, #eef6ff 100%);
    border: 1px solid rgba(41, 128, 254, 0.16);
    box-shadow: var(--shadow);
}

.phone-frame img {
    border-radius: 26px;
    width: 100%;
    object-fit: contain;
}

.floating-card {
    position: absolute;
    background: rgba(255, 255, 255, 0.94);
    border: 1px solid var(--gray-200);
    border-radius: 18px;
    padding: 12px 14px;
    box-shadow: 0 16px 36px rgba(16, 24, 40, 0.10);
    color: var(--gray-700);
    font-size: 13px;
    font-weight: 700;
}

.floating-card strong {
    display: block;
    color: var(--gray-900);
    font-size: 16px;
}

.float-one { left: 0; top: 38px; }
.float-two { right: 0; top: 118px; }
.float-three { left: 8px; bottom: 90px; }
.float-four { right: 24px; bottom: 32px; }

.feature-shortcuts {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 14px;
}

.shortcut-card,
.feature-card,
.category-card,
.risk-card,
.faq-item,
.info-card,
.step-card {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius);
    box-shadow: 0 12px 34px rgba(16, 24, 40, 0.05);
}

.shortcut-card {
    padding: 18px;
}

.shortcut-icon {
    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: 10px;
}

.shortcut-card h3,
.category-card h3,
.feature-card h3,
.risk-card h3,
.info-card h3,
.step-card h3 {
    font-size: 18px;
}

.text-link {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    margin-top: 4px;
    color: var(--primary);
    font-weight: 800;
}

.product-section,
.cold-wallet-section,
.swap-section,
.dapp-section {
    display: grid;
    gap: 28px;
    align-items: center;
}

.visual-panel {
    padding: 20px;
    background: linear-gradient(145deg, #ffffff, #f1f7ff);
    border: 1px solid var(--gray-200);
    border-radius: 30px;
    box-shadow: var(--shadow);
}

.visual-panel img {
    width: 100%;
    max-height: 430px;
    object-fit: contain;
    border-radius: 22px;
}

.feature-list {
    display: grid;
    gap: 12px;
    margin: 20px 0;
    padding: 0;
    list-style: none;
}

.feature-list li {
    position: relative;
    padding: 12px 14px 12px 38px;
    border: 1px solid var(--gray-200);
    border-radius: 16px;
    background: var(--gray-50);
    color: var(--gray-700);
}

.feature-list li::before {
    content: "";
    position: absolute;
    left: 15px;
    top: 20px;
    width: 9px;
    height: 9px;
    border-radius: 999px;
    background: var(--primary);
}

.dapp-card-stack {
    display: grid;
    gap: 14px;
}

.feature-card,
.info-card {
    padding: 22px;
}

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

.step-card {
    padding: 20px;
    position: relative;
    overflow: hidden;
}

.step-num {
    display: inline-grid;
    place-items: center;
    width: 38px;
    height: 38px;
    border-radius: 14px;
    background: var(--primary);
    color: #fff;
    font-weight: 900;
    margin-bottom: 12px;
}

.risk-grid {
    display: grid;
    gap: 14px;
}

.risk-card {
    padding: 20px;
    border-left: 4px solid var(--primary);
}

.risk-card .suggest {
    color: var(--gray-700);
    font-weight: 700;
}

.category-grid {
    display: grid;
    gap: 14px;
}

.category-card {
    padding: 22px;
    min-height: 180px;
}

.category-card:nth-child(1),
.category-card:nth-child(4),
.category-card:nth-child(6) {
    background: linear-gradient(145deg, #ffffff 0%, #f2f8ff 100%);
}

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

.faq-item {
    padding: 20px;
}

.cta-section {
    padding: 56px 0;
    background: linear-gradient(135deg, #edf5ff 0%, #ffffff 58%, #f7fbff 100%);
}

.cta-box {
    width: min(100% - 32px, 860px);
    margin: 0 auto;
    padding: 34px 22px;
    text-align: center;
    border: 1px solid rgba(41, 128, 254, 0.14);
    border-radius: 30px;
    background: rgba(255, 255, 255, 0.82);
    box-shadow: var(--shadow);
}

.page-hero {
    padding: 54px 0 34px;
    background: radial-gradient(circle at 82% 16%, rgba(41, 128, 254, 0.13), transparent 30%), linear-gradient(180deg, #ffffff 0%, #f5f9ff 100%);
}

.page-hero .container {
    max-width: 980px;
}

.page-summary {
    font-size: 17px;
    max-width: 780px;
}

.content-layout {
    display: grid;
    gap: 24px;
    align-items: start;
}

.article-body {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: 28px;
    padding: 24px;
    box-shadow: 0 12px 34px rgba(16, 24, 40, 0.05);
}

.article-body h2 {
    font-size: 25px;
    margin-top: 22px;
}

.article-body h2:first-child {
    margin-top: 0;
}

.check-list,
.number-list {
    margin: 16px 0 22px;
    padding: 0;
    list-style: none;
    display: grid;
    gap: 12px;
}

.check-list li,
.number-list li {
    padding: 13px 14px;
    background: var(--gray-50);
    border: 1px solid var(--gray-200);
    border-radius: 16px;
    color: var(--gray-700);
}

.number-list {
    counter-reset: steps;
}

.number-list li {
    counter-increment: steps;
    padding-left: 52px;
    position: relative;
}

.number-list li::before {
    content: counter(steps);
    position: absolute;
    left: 14px;
    top: 12px;
    width: 26px;
    height: 26px;
    border-radius: 10px;
    display: grid;
    place-items: center;
    background: var(--primary);
    color: #fff;
    font-weight: 900;
    font-size: 13px;
}

.notice-box {
    padding: 18px;
    margin: 20px 0;
    border-radius: 20px;
    border: 1px solid rgba(41, 128, 254, 0.18);
    background: var(--primary-soft);
    color: var(--gray-700);
}

.sidebar {
    display: grid;
    gap: 14px;
}

.sidebar .info-card a {
    display: block;
    padding: 10px 0;
    border-bottom: 1px solid var(--gray-200);
    color: var(--primary);
    font-weight: 800;
}

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

.download-area {
    margin-top: 24px;
    padding-top: 20px;
    border-top: 1px solid var(--gray-200);
}

.site-footer {
    background: #f7f9fc;
    border-top: 1px solid var(--gray-200);
}

.footer-inner {
    width: min(100% - 32px, var(--container));
    margin: 0 auto;
    padding: 38px 0;
    display: grid;
    gap: 24px;
}

.footer-brand {
    font-size: 20px;
    font-weight: 900;
    margin-bottom: 10px;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
}

.footer-links a {
    color: var(--gray-700);
    font-weight: 700;
}

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

.footer-bottom {
    width: min(100% - 32px, var(--container));
    margin: 0 auto;
    padding: 16px 0 24px;
    color: var(--gray-500);
    font-size: 13px;
    border-top: 1px solid var(--gray-200);
}

@media (min-width: 680px) {
    .feature-shortcuts,
    .category-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

    .footer-inner {
        grid-template-columns: 1.4fr 1fr;
    }
}

@media (min-width: 920px) {
    .nav-toggle {
        display: none;
    }

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

    .site-nav a {
        padding: 8px 10px;
        font-size: 14px;
    }

    .product-hero {
        padding: 84px 0 68px;
    }

    .hero-grid {
        grid-template-columns: minmax(0, 1.04fr) minmax(360px, 0.96fr);
        gap: 56px;
    }

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

    .product-section,
    .cold-wallet-section,
    .swap-section,
    .dapp-section {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 56px;
    }

    .cold-wallet-section .visual-panel,
    .dapp-section .visual-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);
    }

    .category-card:nth-child(1),
    .category-card:nth-child(6) {
        grid-column: span 2;
    }

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

    .article-body {
        padding: 34px;
    }

    .page-hero {
        padding: 72px 0 46px;
    }
}

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

    .floating-card {
        position: static;
        width: 100%;
        margin-top: 10px;
    }

    .app-visual {
        min-height: auto;
    }

    .phone-frame {
        width: 100%;
    }
}