:root {
    --primary: #2980FE;
    --primary-soft: #EAF3FF;
    --primary-faint: #F4F8FF;
    --white: #FFFFFF;
    --bg: #F6F8FC;
    --bg-soft: #F9FBFF;
    --line: #E5EAF2;
    --text: #1F2937;
    --muted: #667085;
    --muted-2: #98A2B3;
    --shadow: 0 18px 45px rgba(31, 41, 55, 0.08);
    --shadow-soft: 0 12px 30px rgba(41, 128, 254, 0.10);
    --radius: 24px;
    --radius-lg: 30px;
    --container: 1180px;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang TC", "Noto Sans TC", "Microsoft JhengHei", Arial, sans-serif;
    background: linear-gradient(180deg, #FFFFFF 0%, #F6F8FC 44%, #FFFFFF 100%);
    color: var(--text);
    line-height: 1.72;
    font-size: 16px;
    overflow-x: hidden;
}

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

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

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

h1, h2, h3 {
    color: var(--text);
    line-height: 1.22;
    margin: 0 0 16px;
    letter-spacing: -0.02em;
}

h1 {
    font-size: clamp(34px, 8vw, 64px);
}

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

h3 {
    font-size: 21px;
}

ul, ol {
    padding-left: 20px;
    margin: 0;
    color: var(--muted);
}

li + li {
    margin-top: 8px;
}

.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(229, 234, 242, 0.86);
}

.nav-shell {
    width: min(var(--container), calc(100% - 32px));
    margin: 0 auto;
    min-height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
}

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

.brand-logo {
    width: 38px;
    height: 38px;
    border-radius: 12px;
    object-fit: contain;
    background: var(--primary-soft);
}

.brand-text {
    white-space: nowrap;
}

.nav-toggle {
    display: none;
}

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

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

.main-nav {
    position: absolute;
    left: 16px;
    right: 16px;
    top: 78px;
    display: none;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    padding: 14px;
    border: 1px solid var(--line);
    border-radius: 22px;
    background: var(--white);
    box-shadow: var(--shadow);
}

.nav-toggle:checked ~ .main-nav {
    display: grid;
}

.main-nav a {
    padding: 12px 14px;
    border-radius: 14px;
    color: var(--muted);
    font-size: 15px;
    background: var(--bg-soft);
}

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

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

.section-shell {
    padding: 72px 0;
}

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

.eyebrow,
.badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--primary);
    background: var(--primary-soft);
    border: 1px solid rgba(41, 128, 254, 0.14);
    border-radius: 999px;
    padding: 7px 12px;
    font-size: 14px;
    font-weight: 700;
    margin-bottom: 18px;
}

.gradient-bg {
    position: relative;
    overflow: hidden;
    background:
        radial-gradient(circle at 10% 10%, rgba(41, 128, 254, 0.16), transparent 28%),
        radial-gradient(circle at 88% 10%, rgba(41, 128, 254, 0.10), transparent 26%),
        linear-gradient(180deg, #FFFFFF 0%, #F5F9FF 100%);
}

.app-hero {
    width: min(var(--container), calc(100% - 32px));
    margin: 0 auto;
    padding: 58px 0 34px;
    display: grid;
    gap: 34px;
    align-items: center;
}

.hero-copy p {
    font-size: 18px;
    max-width: 660px;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    align-items: center;
    margin-top: 28px;
}

.download-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 52px;
    padding: 0 26px;
    border-radius: 999px;
    background: var(--primary);
    color: var(--white);
    font-weight: 800;
    box-shadow: 0 14px 28px rgba(41, 128, 254, 0.24);
    transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
    border: none;
    cursor: pointer;
}

.download-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 20px 34px rgba(41, 128, 254, 0.26);
}

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

.security-tags span,
.tag-pill {
    display: inline-flex;
    align-items: center;
    border: 1px solid var(--line);
    background: var(--white);
    border-radius: 999px;
    color: var(--muted);
    padding: 8px 12px;
    font-size: 14px;
    box-shadow: 0 8px 20px rgba(31, 41, 55, 0.04);
}

.app-visual {
    position: relative;
    min-height: 420px;
    padding: 24px;
    display: grid;
    place-items: center;
    background: linear-gradient(145deg, #F7FAFF, #FFFFFF);
    border: 1px solid var(--line);
    border-radius: 34px;
    box-shadow: var(--shadow);
}

.app-visual::before {
    content: "";
    position: absolute;
    inset: 22px;
    border-radius: 28px;
    border: 1px dashed rgba(41, 128, 254, 0.18);
    pointer-events: none;
}

.product-shot {
    position: relative;
    z-index: 2;
    width: min(320px, 82%);
    filter: drop-shadow(0 32px 48px rgba(31, 41, 55, 0.15));
}

.floating-card {
    position: relative;
    z-index: 3;
    width: 100%;
    margin-top: 12px;
    padding: 14px 16px;
    border: 1px solid var(--line);
    border-radius: 18px;
    background: rgba(255, 255, 255, 0.94);
    box-shadow: var(--shadow-soft);
}

.floating-card strong {
    display: block;
    color: var(--text);
    margin-bottom: 3px;
}

.floating-card small {
    color: var(--muted);
}

.ability-bar {
    width: min(var(--container), calc(100% - 32px));
    margin: 8px auto 0;
    display: grid;
    grid-template-columns: 1fr;
    gap: 12px;
    padding-bottom: 42px;
}

.ability-item {
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: 20px;
    padding: 18px;
    box-shadow: 0 10px 26px rgba(31, 41, 55, 0.04);
}

.ability-item b {
    display: block;
    color: var(--primary);
    margin-bottom: 5px;
}

.ability-item span {
    color: var(--muted);
    font-size: 14px;
}

.feature-showcase,
.category-grid,
.ecosystem-grid,
.risk-grid,
.faq-grid,
.card-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 18px;
}

.feature-card,
.category-card,
.risk-card,
.faq-item,
.info-card,
.step-card,
.panel-card {
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 22px;
    box-shadow: 0 12px 30px rgba(31, 41, 55, 0.05);
}

.feature-card {
    overflow: hidden;
    min-height: 340px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.feature-card img {
    margin-top: 18px;
    border-radius: 22px;
    background: var(--primary-faint);
    border: 1px solid var(--line);
}

.feature-link,
.text-link {
    color: var(--primary);
    font-weight: 800;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.feature-link::after,
.text-link::after {
    content: "→";
}

.product-section,
.wallet-panel,
.cold-wallet-panel,
.swap-panel,
.dapp-panel {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
    align-items: center;
    border-radius: var(--radius-lg);
    padding: 24px;
    border: 1px solid var(--line);
    background: var(--white);
    box-shadow: var(--shadow);
}

.cold-wallet-panel,
.dapp-panel,
.safety-panel {
    background: linear-gradient(145deg, #F4F8FF 0%, #FFFFFF 76%);
}

.product-section img,
.wallet-panel img,
.cold-wallet-panel img,
.swap-panel img,
.dapp-panel img {
    border-radius: 28px;
    background: var(--primary-faint);
    border: 1px solid var(--line);
    box-shadow: 0 20px 38px rgba(31, 41, 55, 0.08);
}

.check-list {
    display: grid;
    gap: 10px;
    margin: 18px 0 20px;
}

.check-list span,
.notice-list span {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    color: var(--muted);
}

.check-list span::before,
.notice-list span::before {
    content: "";
    flex: 0 0 9px;
    width: 9px;
    height: 9px;
    margin-top: 10px;
    border-radius: 999px;
    background: var(--primary);
    box-shadow: 0 0 0 5px var(--primary-soft);
}

.process-steps {
    display: grid;
    gap: 16px;
}

.step-card {
    position: relative;
    padding-left: 24px;
}

.step-no {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    border-radius: 16px;
    background: var(--primary);
    color: var(--white);
    font-weight: 800;
    margin-bottom: 14px;
}

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

.risk-card strong,
.category-card strong,
.info-card strong {
    display: block;
    color: var(--text);
    font-size: 18px;
    margin-bottom: 8px;
}

.category-card {
    min-height: 178px;
}

.safety-panel {
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    padding: 24px;
    box-shadow: var(--shadow-soft);
}

.cta-section {
    text-align: center;
    border: 1px solid rgba(41, 128, 254, 0.14);
    border-radius: 34px;
    background:
        radial-gradient(circle at top, rgba(41, 128, 254, 0.16), transparent 34%),
        linear-gradient(145deg, #F4F8FF, #FFFFFF);
    padding: 42px 24px;
    box-shadow: var(--shadow-soft);
}

.cta-section p {
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.page-hero {
    width: min(960px, calc(100% - 32px));
    margin: 0 auto;
    padding: 62px 0 34px;
}

.page-hero p {
    font-size: 18px;
    max-width: 790px;
}

.article-layout {
    width: min(var(--container), calc(100% - 32px));
    margin: 0 auto;
    padding: 20px 0 78px;
    display: grid;
    grid-template-columns: 1fr;
    gap: 22px;
}

.article-main,
.article-side {
    display: grid;
    gap: 20px;
}

.article-card {
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: 0 12px 30px rgba(31, 41, 55, 0.05);
}

.article-card h2 {
    font-size: 28px;
}

.article-side {
    align-self: start;
}

.side-box {
    background: linear-gradient(145deg, #F4F8FF, #FFFFFF);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 22px;
    box-shadow: 0 12px 30px rgba(41, 128, 254, 0.07);
}

.download-panel {
    display: grid;
    gap: 18px;
    width: min(900px, calc(100% - 32px));
    margin: 0 auto 78px;
}

.download-card {
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    padding: 28px;
    box-shadow: var(--shadow);
}

.download-center {
    text-align: center;
}

.faq-list {
    width: min(960px, calc(100% - 32px));
    margin: 0 auto 78px;
    display: grid;
    gap: 16px;
}

.faq-item h2,
.faq-item h3 {
    font-size: 20px;
}

.footer-inner {
    width: min(var(--container), calc(100% - 32px));
    margin: 0 auto;
    padding: 42px 0;
    border-top: 1px solid var(--line);
}

.footer-brand {
    display: grid;
    gap: 16px;
    margin-bottom: 24px;
}

.footer-brand img {
    width: 46px;
    height: 46px;
    border-radius: 14px;
    background: var(--primary-soft);
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: 10px 18px;
    margin-bottom: 18px;
}

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

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

.footer-note {
    font-size: 14px;
    color: var(--muted-2);
    margin: 0;
}

@media (min-width: 640px) {
    .ability-bar,
    .category-grid,
    .ecosystem-grid,
    .risk-grid,
    .card-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

    .feature-showcase,
    .faq-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

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

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

    .main-nav a {
        background: transparent;
        padding: 10px 12px;
        white-space: nowrap;
    }

    .app-hero {
        grid-template-columns: minmax(0, 1.02fr) minmax(420px, 0.98fr);
        padding: 86px 0 40px;
    }

    .ability-bar {
        grid-template-columns: repeat(5, 1fr);
    }

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

    .feature-card {
        padding: 28px;
    }

    .wallet-panel,
    .swap-panel,
    .product-section {
        grid-template-columns: 1.05fr 0.95fr;
        padding: 38px;
    }

    .cold-wallet-panel,
    .dapp-panel {
        grid-template-columns: 0.95fr 1.05fr;
        padding: 38px;
    }

    .cold-wallet-panel .panel-image,
    .dapp-panel .panel-image {
        order: -1;
    }

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

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

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

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

    .floating-card {
        position: absolute;
        width: 210px;
        margin-top: 0;
    }

    .floating-card.card-assets {
        top: 38px;
        left: 28px;
    }

    .floating-card.card-cold {
        top: 118px;
        right: 22px;
    }

    .floating-card.card-swap {
        bottom: 84px;
        left: 20px;
    }

    .floating-card.card-dapp {
        bottom: 28px;
        right: 36px;
    }

    .footer-brand {
        grid-template-columns: 52px minmax(0, 1fr);
        align-items: start;
        max-width: 760px;
    }
}

@media (min-width: 1120px) {
    .main-nav a {
        padding: 10px 14px;
    }
}