:root {
    --primary: #2980FE;
    --primary-soft: #EAF3FF;
    --primary-pale: #F4F8FF;
    --text: #202938;
    --muted: #667085;
    --line: #E6EAF0;
    --bg: #F7FAFE;
    --white: #FFFFFF;
    --gray: #F2F5F8;
    --shadow: 0 18px 50px rgba(32, 41, 56, .08);
    --radius: 22px;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans TC", "Microsoft JhengHei", Arial, sans-serif;
    color: var(--text);
    background: linear-gradient(180deg, #ffffff 0%, #f7fafe 42%, #ffffff 100%);
    line-height: 1.7;
    overflow-x: hidden;
}

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

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

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

h1, h2, h3 {
    margin: 0;
    line-height: 1.22;
    color: var(--text);
}

h1 {
    font-size: clamp(34px, 9vw, 64px);
    letter-spacing: -1.8px;
}

h2 {
    font-size: clamp(26px, 6vw, 42px);
    letter-spacing: -1px;
}

h3 {
    font-size: 20px;
}

ul, ol {
    padding-left: 22px;
    color: var(--muted);
}

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

.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(255, 255, 255, .92);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--line);
}

.nav-wrap {
    min-height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
}

.logo {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-weight: 800;
    letter-spacing: -.3px;
    white-space: nowrap;
}

.logo img,
.footer-brand img {
    width: 38px;
    height: 38px;
    object-fit: contain;
    border-radius: 12px;
}

.nav-toggle {
    width: 44px;
    height: 44px;
    border: 1px solid var(--line);
    background: var(--white);
    border-radius: 14px;
    display: inline-flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    padding: 0 11px;
}

.nav-toggle span {
    height: 2px;
    background: var(--text);
    border-radius: 20px;
}

.site-nav {
    position: absolute;
    left: 16px;
    right: 16px;
    top: 74px;
    display: none;
    padding: 12px;
    border: 1px solid var(--line);
    border-radius: 20px;
    background: var(--white);
    box-shadow: var(--shadow);
}

.site-nav.open {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
}

.site-nav a {
    padding: 11px 12px;
    border-radius: 14px;
    color: #3D4A5C;
    font-weight: 650;
    font-size: 14px;
}

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

.section {
    padding: 70px 0;
}

.section-soft {
    padding: 70px 0;
    background: linear-gradient(180deg, #F5F9FF 0%, #FFFFFF 100%);
}

.section-head {
    display: grid;
    gap: 14px;
    margin-bottom: 30px;
}

.section-head.center {
    text-align: center;
    max-width: 780px;
    margin: 0 auto 34px;
}

.badge,
.category-badge,
.security-tag {
    display: inline-flex;
    align-items: center;
    width: fit-content;
    gap: 8px;
    padding: 8px 12px;
    border-radius: 999px;
    color: var(--primary);
    background: var(--primary-soft);
    border: 1px solid rgba(41, 128, 254, .16);
    font-weight: 750;
    font-size: 13px;
}

.app-hero {
    position: relative;
    padding: 72px 0 42px;
    overflow: hidden;
}

.gradient-bg::before {
    content: "";
    position: absolute;
    inset: -120px -20% auto auto;
    width: 520px;
    height: 520px;
    border-radius: 999px;
    background: radial-gradient(circle, rgba(41, 128, 254, .18), rgba(41, 128, 254, 0) 68%);
    pointer-events: none;
}

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

.hero-copy {
    display: grid;
    gap: 22px;
}

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

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

.download-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 50px;
    padding: 0 24px;
    color: var(--white);
    background: var(--primary);
    border-radius: 999px;
    border: 1px solid var(--primary);
    font-weight: 800;
    box-shadow: 0 12px 28px rgba(41, 128, 254, .25);
    transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}

.download-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 18px 34px rgba(41, 128, 254, .28);
}

.hero-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.app-visual {
    position: relative;
    padding: 22px;
    border-radius: 30px;
    background: linear-gradient(145deg, #FFFFFF, #EEF6FF);
    border: 1px solid var(--line);
    box-shadow: var(--shadow);
}

.app-visual .phone-shell {
    max-width: 390px;
    margin: 0 auto;
    border-radius: 32px;
    padding: 14px;
    background: #ffffff;
    border: 1px solid var(--line);
    box-shadow: 0 22px 60px rgba(41, 128, 254, .12);
}

.floating-card {
    display: grid;
    gap: 2px;
    padding: 13px 15px;
    border: 1px solid var(--line);
    border-radius: 18px;
    background: rgba(255, 255, 255, .94);
    box-shadow: 0 14px 38px rgba(32, 41, 56, .09);
    font-size: 13px;
}

.floating-card strong {
    color: var(--text);
}

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

.float-grid {
    display: grid;
    gap: 10px;
    margin-top: 14px;
}

.ability-bar {
    display: grid;
    gap: 12px;
    margin-top: 34px;
    padding: 12px;
    border-radius: 26px;
    border: 1px solid var(--line);
    background: rgba(255,255,255,.84);
    box-shadow: var(--shadow);
}

.ability-item {
    padding: 18px;
    border-radius: 18px;
    background: var(--white);
    border: 1px solid var(--line);
}

.ability-item strong {
    display: block;
    color: var(--primary);
    margin-bottom: 4px;
}

.feature-showcase,
.ecosystem-grid,
.category-grid,
.risk-grid,
.faq-grid {
    display: grid;
    gap: 18px;
}

.feature-card,
.info-card,
.risk-card,
.faq-item,
.simple-card,
.step-card {
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    box-shadow: 0 12px 35px rgba(32, 41, 56, .05);
}

.feature-card {
    overflow: hidden;
    display: grid;
}

.feature-card .feature-copy {
    padding: 24px;
    display: grid;
    gap: 12px;
}

.feature-card img {
    width: 100%;
    height: 210px;
    object-fit: cover;
    background: var(--primary-pale);
}

.link-arrow {
    color: var(--primary);
    font-weight: 800;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.product-section,
.wallet-panel,
.cold-wallet-panel,
.swap-panel,
.dapp-panel {
    display: grid;
    gap: 24px;
    align-items: center;
}

.product-section .visual-card,
.wallet-panel .visual-card,
.cold-wallet-panel .visual-card,
.swap-panel .visual-card,
.dapp-panel .visual-card {
    border-radius: 28px;
    padding: 18px;
    border: 1px solid var(--line);
    background: var(--white);
    box-shadow: var(--shadow);
}

.visual-card img {
    border-radius: 22px;
    width: 100%;
}

.detail-list {
    display: grid;
    gap: 12px;
    margin: 18px 0;
}

.detail-list li,
.check-list li {
    margin-bottom: 8px;
}

.pill-row {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.pill {
    padding: 8px 12px;
    border-radius: 999px;
    background: var(--primary-pale);
    color: #345;
    border: 1px solid var(--line);
    font-weight: 650;
    font-size: 13px;
}

.safety-panel {
    padding: 22px;
    border-radius: 26px;
    border: 1px solid #DDEBFF;
    background: linear-gradient(135deg, #F3F8FF, #FFFFFF);
}

.swap-panel .confirm-box,
.dapp-panel .auth-box,
.tip-box {
    padding: 20px;
    border-radius: 22px;
    border: 1px solid var(--line);
    background: var(--primary-pale);
}

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

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

.step-number {
    width: 38px;
    height: 38px;
    border-radius: 14px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    background: var(--primary);
    font-weight: 900;
    margin-bottom: 12px;
}

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

.risk-card strong {
    display: block;
    margin-bottom: 8px;
}

.risk-card em {
    display: block;
    margin-top: 10px;
    font-style: normal;
    color: var(--text);
    font-weight: 750;
}

.ecosystem-grid .simple-card,
.category-grid .simple-card {
    padding: 20px;
}

.faq-item {
    padding: 20px;
}

.faq-item h3,
.faq-item summary {
    font-weight: 800;
    color: var(--text);
}

.faq-item summary {
    cursor: pointer;
}

.cta-section {
    text-align: center;
    padding: 56px 20px;
    border-radius: 32px;
    border: 1px solid #DCEBFF;
    background:
        radial-gradient(circle at top left, rgba(41,128,254,.12), transparent 34%),
        linear-gradient(135deg, #F5F9FF, #FFFFFF);
    box-shadow: var(--shadow);
}

.cta-section p {
    max-width: 680px;
    margin: 14px auto 24px;
}

.page-hero {
    padding: 58px 0 24px;
}

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

.content-layout {
    display: grid;
    gap: 22px;
    align-items: start;
    padding: 28px 0 70px;
}

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

.article-card h2 {
    font-size: 26px;
    margin: 26px 0 12px;
}

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

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

.side-panel .simple-card {
    padding: 18px;
}

.ops-grid {
    display: grid;
    gap: 14px;
    margin: 20px 0;
}

.ops-card {
    padding: 18px;
    border-radius: 20px;
    border: 1px solid var(--line);
    background: var(--primary-pale);
}

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

.download-page-box {
    display: grid;
    gap: 22px;
    align-items: start;
}

.site-footer {
    background: #202938;
    color: #E7ECF5;
    padding: 54px 0 24px;
}

.site-footer p,
.site-footer a,
.footer-bottom {
    color: #B9C2CF;
}

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

.footer-grid h3 {
    color: #FFFFFF;
    font-size: 16px;
    margin-bottom: 10px;
}

.footer-grid a {
    display: block;
    padding: 5px 0;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
}

.footer-bottom {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding-top: 22px;
    margin-top: 30px;
    border-top: 1px solid rgba(255,255,255,.1);
    font-size: 13px;
}

@media (min-width: 640px) {
    .ability-bar,
    .category-grid,
    .risk-grid,
    .ecosystem-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

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

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

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

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

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

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

    .hero-grid,
    .product-section,
    .wallet-panel,
    .swap-panel,
    .dapp-panel,
    .download-page-box {
        grid-template-columns: 1.03fr .97fr;
    }

    .cold-wallet-panel {
        grid-template-columns: .97fr 1.03fr;
    }

    .cold-wallet-panel .visual-card {
        order: -1;
    }

    .float-grid {
        position: absolute;
        inset: auto 18px 18px auto;
        width: min(92%, 430px);
        grid-template-columns: repeat(2, 1fr);
    }

    .ability-bar {
        grid-template-columns: repeat(5, minmax(0, 1fr));
    }

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

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

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

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

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

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

@media (min-width: 1080px) {
    .feature-showcase {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .feature-card {
        grid-template-columns: 1.08fr .92fr;
        min-height: 290px;
    }

    .feature-card img {
        height: 100%;
    }

    .feature-card:nth-child(2),
    .feature-card:nth-child(3) {
        grid-template-columns: .92fr 1.08fr;
    }

    .feature-card:nth-child(2) img,
    .feature-card:nth-child(3) img {
        order: -1;
    }
}