/* Base */
:root {
    --primary: #2980FE;
    --primary-soft: #EAF3FF;
    --primary-light: #F4F8FF;
    --white: #FFFFFF;
    --gray-50: #F7F9FC;
    --gray-100: #EEF2F7;
    --gray-200: #DDE5EF;
    --gray-500: #6B7280;
    --gray-700: #374151;
    --gray-900: #111827;
    --shadow-soft: 0 18px 45px rgba(41, 128, 254, 0.10);
    --shadow-card: 0 16px 40px rgba(17, 24, 39, 0.06);
    --radius-lg: 28px;
    --radius-md: 22px;
    --radius-sm: 16px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", Arial, sans-serif;
    background: linear-gradient(180deg, #FFFFFF 0%, #F7FAFF 42%, #FFFFFF 100%);
    color: var(--gray-900);
    line-height: 1.7;
    overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.content-container {
    width: min(100% - 32px, 1180px);
    margin: 0 auto;
}
.gradient-background {
    background: radial-gradient(circle at 20% 10%, rgba(41,128,254,.15), transparent 34%), linear-gradient(135deg, #FFFFFF 0%, #F2F7FF 100%);
}
.section-label, .category-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--primary);
    background: var(--primary-soft);
    border: 1px solid rgba(41,128,254,.15);
    border-radius: 999px;
    padding: 7px 13px;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: .03em;
}
.section-head {
    margin: 0 0 24px;
}
.section-head h2 {
    margin: 12px 0 10px;
    font-size: clamp(28px, 4vw, 46px);
    line-height: 1.18;
    letter-spacing: -0.04em;
}
.section-head p {
    margin: 0;
    color: var(--gray-500);
    max-width: 760px;
}
/* Header, logo, responsive nav, mobile nav, desktop nav */
.site-header {
    position: sticky;
    top: 0;
    z-index: 30;
    background: rgba(255,255,255,.86);
    backdrop-filter: blur(18px);
    border-bottom: 1px solid rgba(221,229,239,.78);
}
.header-inner {
    min-height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}
.logo {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-weight: 800;
    color: var(--gray-900);
    letter-spacing: -0.03em;
}
.logo img {
    width: 38px;
    height: 38px;
    object-fit: contain;
    border-radius: 12px;
}
.responsive-nav {
    position: absolute;
    top: 72px;
    left: 16px;
    right: 16px;
    display: none;
    flex-direction: column;
    gap: 6px;
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: 22px;
    padding: 12px;
    box-shadow: var(--shadow-card);
}
.responsive-nav.is-open { display: flex; }
.responsive-nav a {
    padding: 11px 13px;
    border-radius: 14px;
    color: var(--gray-700);
    font-size: 14px;
    font-weight: 650;
}
.responsive-nav a.active, .responsive-nav a:hover {
    color: var(--primary);
    background: var(--primary-soft);
}
.mobile-nav-toggle {
    width: 42px;
    height: 42px;
    border: 1px solid var(--gray-200);
    border-radius: 14px;
    background: var(--white);
    display: grid;
    place-items: center;
    padding: 9px;
}
.mobile-nav-toggle span {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--gray-900);
    margin: 2px 0;
    border-radius: 99px;
}
/* Unified download button */
.download-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 0 22px;
    border-radius: 999px;
    background: var(--primary);
    color: var(--white);
    font-weight: 800;
    font-size: 15px;
    box-shadow: 0 14px 30px rgba(41,128,254,.28);
    transition: transform .2s ease, box-shadow .2s ease;
    border: 0;
    cursor: pointer;
    white-space: nowrap;
}
.download-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 18px 36px rgba(41,128,254,.32);
}
/* Launch hero, app showcase, hero visual */
.launch-hero {
    position: relative;
    padding: 44px 0 34px;
    overflow: hidden;
}
.launch-hero::before {
    content: "";
    position: absolute;
    width: 360px;
    height: 360px;
    right: -170px;
    top: 20px;
    border-radius: 50%;
    background: rgba(41,128,254,.12);
    filter: blur(6px);
}
.launch-grid {
    position: relative;
    display: grid;
    gap: 28px;
    align-items: center;
}
.hero-copy h1, .page-hero h1 {
    margin: 14px 0 16px;
    font-size: clamp(38px, 8vw, 76px);
    line-height: 1.05;
    letter-spacing: -0.06em;
}
.hero-copy p, .page-hero p {
    color: var(--gray-500);
    font-size: 16px;
    margin: 0 0 24px;
    max-width: 660px;
}
.hero-tags, .floating-tags, .mini-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}
.hero-tags { margin-top: 18px; }
.hero-tags span, .mini-tags span, .floating-tag {
    display: inline-flex;
    align-items: center;
    border: 1px solid var(--gray-200);
    background: rgba(255,255,255,.82);
    color: var(--gray-700);
    padding: 8px 12px;
    border-radius: 999px;
    font-size: 13px;
    font-weight: 700;
}
.hero-visual {
    position: relative;
    min-height: 420px;
    display: grid;
    place-items: center;
}
.app-showcase {
    width: min(78vw, 380px);
    padding: 18px;
    border-radius: 36px;
    background: linear-gradient(160deg, rgba(255,255,255,.9), rgba(234,243,255,.8));
    border: 1px solid rgba(41,128,254,.16);
    box-shadow: var(--shadow-soft);
}
.app-showcase img {
    width: 100%;
    max-height: 520px;
    object-fit: contain;
    margin: 0 auto;
}
.floating-tag {
    position: absolute;
    box-shadow: 0 12px 28px rgba(17,24,39,.08);
}
.float-1 { top: 18px; left: 0; }
.float-2 { top: 88px; right: 0; }
.float-3 { bottom: 96px; left: 8px; }
.float-4 { bottom: 28px; right: 12px; }
/* Highlight bar */
.highlight-bar {
    padding: 24px 0 36px;
}
.highlight-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 12px;
}
.highlight-card, .launch-card {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-md);
    padding: 18px;
    box-shadow: 0 10px 30px rgba(17,24,39,.04);
}
.highlight-card b, .launch-card b {
    display: block;
    color: var(--gray-900);
    margin: 8px 0 5px;
    font-size: 17px;
}
.highlight-card p, .launch-card p {
    margin: 0 0 10px;
    color: var(--gray-500);
    font-size: 14px;
}
.tag-dot {
    width: 10px;
    height: 10px;
    display: inline-block;
    border-radius: 99px;
    background: var(--primary);
    box-shadow: 0 0 0 6px var(--primary-soft);
}
.text-link {
    color: var(--primary);
    font-weight: 800;
    font-size: 14px;
}
/* Big feature card, wallet feature, cold wallet feature, swap feature, dapp feature */
.feature-stack {
    padding: 24px 0;
    display: grid;
    gap: 22px;
}
.big-feature-card {
    display: grid;
    gap: 24px;
    align-items: center;
    border: 1px solid var(--gray-200);
    border-radius: 30px;
    padding: 24px;
    background: var(--white);
    box-shadow: var(--shadow-card);
    overflow: hidden;
}
.big-feature-card h2 {
    margin: 10px 0 12px;
    font-size: clamp(28px, 5vw, 48px);
    line-height: 1.1;
    letter-spacing: -0.05em;
}
.big-feature-card p {
    margin: 0 0 14px;
    color: var(--gray-500);
}
.feature-image {
    background: linear-gradient(145deg, #F7FAFF, #EAF3FF);
    border-radius: 28px;
    border: 1px solid rgba(41,128,254,.12);
    padding: 16px;
    min-height: 260px;
    display: grid;
    place-items: center;
}
.feature-image img {
    max-height: 390px;
    object-fit: contain;
}
.feature-points, .check-list {
    display: grid;
    gap: 10px;
    padding: 0;
    margin: 16px 0;
    list-style: none;
}
.feature-points li, .check-list li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    color: var(--gray-700);
    font-weight: 600;
}
.feature-points li::before, .check-list li::before {
    content: "";
    width: 9px;
    height: 9px;
    border-radius: 50%;
    margin-top: 9px;
    flex: 0 0 auto;
    background: var(--primary);
}
.wallet-feature { background: linear-gradient(135deg, #FFFFFF, #F7FAFF); }
.cold-wallet-feature { background: linear-gradient(135deg, #F8FBFF, #FFFFFF); }
.swap-feature { background: linear-gradient(145deg, #FFFFFF, #F5F9FF); }
.dapp-feature { background: linear-gradient(135deg, #FFFFFF, #F3F7FC); }
.link-row {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 16px;
}
.link-pill {
    display: inline-flex;
    align-items: center;
    color: var(--primary);
    border: 1px solid rgba(41,128,254,.18);
    background: var(--primary-soft);
    border-radius: 999px;
    padding: 9px 13px;
    font-weight: 800;
    font-size: 13px;
}
/* Process steps */
.process-section, .risk-section, .category-section, .faq-summary, .cta-section {
    padding: 42px 0;
}
.process-steps {
    display: grid;
    gap: 14px;
}
.step-card {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-md);
    padding: 18px;
    box-shadow: 0 10px 28px rgba(17,24,39,.04);
}
.step-number {
    display: inline-grid;
    place-items: center;
    width: 38px;
    height: 38px;
    border-radius: 14px;
    background: var(--primary);
    color: var(--white);
    font-weight: 900;
    margin-bottom: 12px;
}
.step-card h3, .risk-card h3, .category-card h3, .info-card h3 {
    margin: 0 0 8px;
    font-size: 18px;
}
.step-card p, .risk-card p, .category-card p, .info-card p {
    margin: 0 0 12px;
    color: var(--gray-500);
    font-size: 14px;
}
/* Risk grid, safety panel */
.safety-panel {
    border-radius: 30px;
    padding: 24px;
    background: linear-gradient(135deg, #F5F9FF, #FFFFFF);
    border: 1px solid var(--gray-200);
}
.risk-grid {
    display: grid;
    gap: 14px;
}
.risk-card {
    border-left: 4px solid var(--primary);
    background: var(--white);
    border-top: 1px solid var(--gray-200);
    border-right: 1px solid var(--gray-200);
    border-bottom: 1px solid var(--gray-200);
    border-radius: 18px;
    padding: 18px;
}
.risk-card .advice {
    display: block;
    color: var(--gray-700);
    font-weight: 800;
    margin-bottom: 10px;
}
/* App category center, category grid */
.app-category-center {
    border-radius: 34px;
    padding: 24px;
    background: var(--gray-50);
    border: 1px solid var(--gray-200);
}
.category-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 14px;
}
.category-card {
    min-height: 172px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: 24px;
    padding: 18px;
    box-shadow: 0 10px 26px rgba(17,24,39,.035);
}
.category-icon {
    width: 42px;
    height: 42px;
    border-radius: 16px;
    background: var(--primary-soft);
    display: grid;
    place-items: center;
    color: var(--primary);
    font-weight: 900;
    margin-bottom: 12px;
}
/* FAQ item */
.faq-list {
    display: grid;
    gap: 12px;
}
.faq-item {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: 20px;
    padding: 18px;
}
.faq-item h3 {
    margin: 0 0 8px;
    font-size: 17px;
}
.faq-item p {
    margin: 0;
    color: var(--gray-500);
}
/* CTA */
.cta-section .cta-box {
    text-align: center;
    background: radial-gradient(circle at 50% 0%, rgba(41,128,254,.18), transparent 38%), linear-gradient(135deg, #FFFFFF, #EEF6FF);
    border: 1px solid rgba(41,128,254,.14);
    border-radius: 34px;
    padding: 34px 20px;
    box-shadow: var(--shadow-soft);
}
.cta-box h2 {
    margin: 0 0 10px;
    font-size: clamp(28px, 5vw, 46px);
    letter-spacing: -0.05em;
    line-height: 1.15;
}
.cta-box p {
    margin: 0 auto 20px;
    max-width: 680px;
    color: var(--gray-500);
}
/* Generic content pages */
.page-hero {
    padding: 48px 0 26px;
}
.page-shell {
    display: grid;
    gap: 20px;
    padding: 18px 0 50px;
}
.article-panel {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: 30px;
    padding: 24px;
    box-shadow: var(--shadow-card);
}
.article-panel h2 {
    margin: 0 0 12px;
    font-size: 26px;
    letter-spacing: -0.035em;
}
.article-panel p { color: var(--gray-700); }
.info-grid {
    display: grid;
    gap: 14px;
    margin: 20px 0;
}
.info-card {
    background: var(--gray-50);
    border: 1px solid var(--gray-200);
    border-radius: 22px;
    padding: 18px;
}
.aside-panel {
    background: linear-gradient(145deg, #F8FBFF, #FFFFFF);
    border: 1px solid var(--gray-200);
    border-radius: 30px;
    padding: 22px;
    align-self: start;
    box-shadow: 0 12px 30px rgba(17,24,39,.04);
}
.aside-panel h2, .aside-panel h3 {
    margin-top: 0;
}
.hero-mini-visual {
    display: grid;
    place-items: center;
    background: var(--primary-light);
    border: 1px solid rgba(41,128,254,.12);
    border-radius: 30px;
    padding: 16px;
}
.hero-mini-visual img {
    max-height: 300px;
    object-fit: contain;
}
.download-page .article-panel {
    text-align: center;
}
.download-steps {
    counter-reset: downloadStep;
    display: grid;
    gap: 12px;
    margin: 22px 0;
    text-align: left;
}
.download-steps li {
    list-style: none;
    counter-increment: downloadStep;
    border: 1px solid var(--gray-200);
    border-radius: 18px;
    padding: 14px 14px 14px 54px;
    position: relative;
    background: var(--gray-50);
}
.download-steps li::before {
    content: counter(downloadStep);
    position: absolute;
    left: 14px;
    top: 14px;
    width: 28px;
    height: 28px;
    display: grid;
    place-items: center;
    border-radius: 10px;
    color: var(--white);
    background: var(--primary);
    font-weight: 900;
}
/* Footer */
.site-footer {
    border-top: 1px solid var(--gray-200);
    background: #FFFFFF;
    padding: 34px 0 22px;
}
.footer-grid {
    display: grid;
    gap: 20px;
}
.footer-brand {
    font-size: 22px;
    font-weight: 900;
    letter-spacing: -0.04em;
    margin-bottom: 8px;
}
.site-footer p {
    color: var(--gray-500);
    margin: 0;
    max-width: 560px;
}
.footer-links {
    display: grid;
    gap: 10px;
}
.footer-links a {
    color: var(--gray-700);
    font-weight: 700;
}
.footer-links a:hover { color: var(--primary); }
.footer-bottom {
    color: var(--gray-500);
    font-size: 13px;
    margin-top: 24px;
}
@media (min-width: 680px) {
    .highlight-grid { grid-template-columns: repeat(2, 1fr); }
    .category-grid { grid-template-columns: repeat(2, 1fr); }
    .risk-grid { grid-template-columns: repeat(2, 1fr); }
    .process-steps { grid-template-columns: repeat(2, 1fr); }
    .info-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 980px) {
    .mobile-nav-toggle { display: none; }
    .desktop-nav {
        position: static;
        display: flex;
        flex-direction: row;
        align-items: center;
        padding: 0;
        border: 0;
        box-shadow: none;
        background: transparent;
        gap: 2px;
    }
    .desktop-nav a { padding: 9px 10px; font-size: 14px; }
    .launch-hero { padding: 78px 0 54px; }
    .launch-grid { grid-template-columns: minmax(0, 1.05fr) minmax(360px, .95fr); }
    .hero-copy p { font-size: 18px; }
    .hero-visual { min-height: 560px; }
    .highlight-grid { grid-template-columns: repeat(3, 1fr); }
    .big-feature-card {
        grid-template-columns: 1fr 1fr;
        padding: 34px;
        min-height: 520px;
    }
    .big-feature-card.reverse .feature-copy { order: 2; }
    .big-feature-card.reverse .feature-image { order: 1; }
    .process-steps { grid-template-columns: repeat(3, 1fr); }
    .risk-grid { grid-template-columns: repeat(3, 1fr); }
    .category-grid { grid-template-columns: repeat(4, 1fr); }
    .app-category-center { padding: 32px; }
    .page-shell {
        grid-template-columns: minmax(0, 1fr) 330px;
        align-items: start;
    }
    .article-panel { padding: 34px; }
    .footer-grid {
        grid-template-columns: 1fr 320px;
        align-items: start;
    }
    .footer-links { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 1180px) {
    .desktop-nav a { padding: 10px 13px; }
}