/* Base */
:root {
    --primary: #2980FE;
    --primary-soft: #EAF3FF;
    --primary-very-soft: #F5F9FF;
    --white: #FFFFFF;
    --gray-50: #F7F9FC;
    --gray-100: #EEF2F7;
    --gray-200: #E1E7EF;
    --gray-500: #667085;
    --gray-700: #344054;
    --gray-900: #111827;
    --shadow: 0 18px 50px rgba(17, 24, 39, 0.08);
    --radius-xl: 28px;
    --radius-lg: 22px;
    --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;
    color: var(--gray-900);
    background: linear-gradient(180deg, #FFFFFF 0%, #F6FAFF 42%, #FFFFFF 100%);
    line-height: 1.72;
    overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.main-section { padding: 46px 18px; }
.content-container, .container { width: min(100% - 36px, var(--container)); margin: 0 auto; }
.gradient-background { background: radial-gradient(circle at top left, rgba(41,128,254,.14), transparent 32%), linear-gradient(135deg, #F7FBFF, #FFFFFF); }
.eyebrow, .category-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    width: fit-content;
    padding: 8px 13px;
    border-radius: 999px;
    background: var(--primary-soft);
    color: var(--primary);
    font-size: 13px;
    font-weight: 700;
    letter-spacing: .02em;
}
.section-head { margin-bottom: 24px; }
.section-head h2 { margin: 12px 0 8px; font-size: clamp(28px, 6vw, 48px); line-height: 1.14; letter-spacing: -0.04em; }
.section-head p { max-width: 760px; margin: 0; color: var(--gray-500); }

/* header */
.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(255,255,255,.88);
    border-bottom: 1px solid rgba(225,231,239,.9);
    backdrop-filter: blur(18px);
}
.nav-shell {
    width: min(100% - 28px, 1220px);
    min-height: 68px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}
.logo {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-weight: 800;
    letter-spacing: -0.02em;
    color: var(--gray-900);
    white-space: nowrap;
}
.logo img { width: 38px; height: 38px; border-radius: 12px; object-fit: cover; box-shadow: 0 8px 20px rgba(41,128,254,.15); }
.site-nav { display: none; }
.site-nav a {
    padding: 9px 11px;
    color: var(--gray-700);
    font-size: 14px;
    border-radius: 999px;
    transition: .2s ease;
}
.site-nav a:hover, .site-nav a.active { color: var(--primary); background: var(--primary-soft); }
.nav-toggle { position: absolute; opacity: 0; pointer-events: none; }
.nav-toggle-label {
    width: 42px;
    height: 42px;
    border-radius: 14px;
    border: 1px solid var(--gray-200);
    display: grid;
    place-items: center;
    gap: 4px;
    padding: 10px;
    background: var(--white);
}
.nav-toggle-label span { width: 20px; height: 2px; background: var(--gray-700); display: block; border-radius: 999px; }
.nav-toggle:checked ~ .site-nav {
    display: grid;
    position: absolute;
    left: 14px;
    right: 14px;
    top: 76px;
    padding: 14px;
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: 22px;
    box-shadow: var(--shadow);
}

/* unified download button */
.download-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 50px;
    padding: 0 24px;
    border-radius: 999px;
    background: var(--primary);
    color: #fff;
    font-weight: 800;
    box-shadow: 0 14px 28px rgba(41,128,254,.22);
    border: 1px solid rgba(41,128,254,.2);
    transition: transform .18s ease, box-shadow .18s ease;
}
.download-btn:hover { transform: translateY(-2px); box-shadow: 0 18px 36px rgba(41,128,254,.28); }

/* launch hero and app showcase */
.launch-hero {
    position: relative;
    padding: 54px 18px 34px;
    overflow: hidden;
}
.launch-hero::before {
    content: "";
    position: absolute;
    inset: -120px -100px auto auto;
    width: 360px;
    height: 360px;
    background: radial-gradient(circle, rgba(41,128,254,.18), transparent 70%);
    pointer-events: none;
}
.launch-hero .content-container {
    position: relative;
    display: grid;
    gap: 34px;
    align-items: center;
}
.hero-copy h1, .page-hero h1 {
    margin: 14px 0 14px;
    font-size: clamp(38px, 10vw, 72px);
    line-height: 1.04;
    letter-spacing: -0.06em;
}
.hero-copy p, .page-hero p { color: var(--gray-500); font-size: 17px; margin: 0 0 22px; max-width: 640px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; align-items: center; }
.security-tags, .hero-badges { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 22px; }
.security-tags span, .hero-badges span {
    padding: 8px 12px;
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: 999px;
    color: var(--gray-700);
    font-size: 13px;
}
.hero-visual, .app-showcase {
    min-height: 440px;
    border-radius: 34px;
    background: linear-gradient(160deg, #FFFFFF 0%, #EFF6FF 100%);
    border: 1px solid var(--gray-200);
    box-shadow: var(--shadow);
    position: relative;
    display: grid;
    place-items: center;
    padding: 22px;
    overflow: hidden;
}
.hero-visual::after {
    content: "";
    position: absolute;
    width: 260px;
    height: 260px;
    border-radius: 50%;
    background: rgba(41,128,254,.10);
    bottom: -80px;
    left: -70px;
}
.hero-visual img { max-height: 390px; object-fit: contain; z-index: 2; filter: drop-shadow(0 26px 40px rgba(17,24,39,.16)); }
.float-tag {
    position: absolute;
    z-index: 3;
    padding: 9px 12px;
    border-radius: 999px;
    background: rgba(255,255,255,.92);
    border: 1px solid var(--gray-200);
    box-shadow: 0 12px 30px rgba(17,24,39,.08);
    color: var(--gray-700);
    font-size: 13px;
    font-weight: 700;
}
.float-tag.one { top: 38px; left: 24px; }
.float-tag.two { top: 100px; right: 18px; }
.float-tag.three { bottom: 88px; left: 18px; }
.float-tag.four { bottom: 34px; right: 24px; }

/* highlight bar */
.highlight-bar {
    display: grid;
    grid-template-columns: 1fr;
    gap: 14px;
}
.highlight-card, .launch-card {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: 24px;
    padding: 20px;
    box-shadow: 0 14px 34px rgba(17,24,39,.05);
}
.highlight-card .label, .mini-label {
    display: inline-flex;
    color: var(--primary);
    background: var(--primary-soft);
    border-radius: 999px;
    padding: 5px 10px;
    font-size: 12px;
    font-weight: 800;
}
.highlight-card h3, .launch-card h3 { margin: 12px 0 6px; font-size: 19px; }
.highlight-card p, .launch-card p { margin: 0 0 12px; color: var(--gray-500); font-size: 14px; }
.text-link { color: var(--primary); font-weight: 800; }

/* big feature cards */
.big-feature-card {
    display: grid;
    gap: 24px;
    align-items: center;
    border-radius: 32px;
    padding: 24px;
    background: var(--white);
    border: 1px solid var(--gray-200);
    box-shadow: var(--shadow);
    margin: 20px 0;
    overflow: hidden;
}
.big-feature-card.soft { background: linear-gradient(145deg, #FFFFFF 0%, #F2F7FF 100%); }
.big-feature-card h2 { margin: 10px 0 10px; font-size: clamp(28px, 7vw, 48px); line-height: 1.12; letter-spacing: -0.04em; }
.big-feature-card p { color: var(--gray-500); margin: 0 0 16px; }
.feature-list, .check-list { list-style: none; padding: 0; margin: 18px 0; display: grid; gap: 10px; }
.feature-list li, .check-list li {
    position: relative;
    padding-left: 28px;
    color: var(--gray-700);
}
.feature-list li::before, .check-list li::before {
    content: "";
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--primary);
    position: absolute;
    left: 0;
    top: .7em;
    box-shadow: 0 0 0 5px var(--primary-soft);
}
.feature-image {
    border-radius: 28px;
    background: linear-gradient(160deg, #F8FBFF, #EAF3FF);
    padding: 16px;
    min-height: 260px;
    display: grid;
    place-items: center;
    border: 1px solid var(--gray-200);
}
.feature-image img { max-height: 360px; object-fit: contain; filter: drop-shadow(0 20px 30px rgba(17,24,39,.12)); }
.wallet-feature {}
.cold-wallet-feature {}
.swap-feature {}
.dapp-feature {}

/* process, risk, categories */
.process-steps, .category-grid, .app-category-center, .risk-grid, .faq-grid, .download-steps {
    display: grid;
    gap: 16px;
}
.step-card, .category-card, .risk-card, .faq-item, .info-card, .safety-panel {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: 24px;
    padding: 20px;
    box-shadow: 0 14px 34px rgba(17,24,39,.04);
}
.step-no {
    width: 42px;
    height: 42px;
    border-radius: 14px;
    background: var(--primary);
    color: #fff;
    display: grid;
    place-items: center;
    font-weight: 900;
    margin-bottom: 14px;
}
.step-card h3, .category-card h3, .risk-card h3, .faq-item h3, .info-card h3 { margin: 0 0 8px; }
.step-card p, .category-card p, .risk-card p, .faq-item p, .info-card p, .safety-panel p { margin: 0 0 12px; color: var(--gray-500); }
.risk-card { border-left: 4px solid var(--primary); }
.category-card { min-height: 176px; display: flex; flex-direction: column; justify-content: space-between; }
.app-category-center .category-card:nth-child(1), .app-category-center .category-card:nth-child(4) { background: linear-gradient(145deg, #FFFFFF, #F2F8FF); }

/* page layout */
.page-hero {
    padding: 52px 18px 28px;
    background: radial-gradient(circle at top right, rgba(41,128,254,.16), transparent 34%), linear-gradient(180deg, #FFFFFF, #F7FAFF);
}
.page-hero .content-container { display: grid; gap: 18px; }
.page-hero h1 { max-width: 900px; font-size: clamp(34px, 8vw, 62px); }
.article-layout {
    width: min(100% - 36px, 1120px);
    margin: 0 auto;
    display: grid;
    gap: 22px;
    padding: 38px 0 64px;
}
.article-main {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: 28px;
    padding: 22px;
    box-shadow: var(--shadow);
}
.article-main h2 { font-size: 26px; margin: 4px 0 12px; letter-spacing: -0.03em; }
.article-main p { color: var(--gray-700); }
.article-side { display: grid; gap: 16px; align-content: start; }
.note-box {
    padding: 18px;
    border-radius: 22px;
    background: var(--primary-very-soft);
    border: 1px solid #DDEBFF;
    color: var(--gray-700);
}
.inline-links { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 18px; }
.inline-links a {
    padding: 8px 12px;
    border-radius: 999px;
    background: var(--gray-50);
    border: 1px solid var(--gray-200);
    color: var(--gray-700);
    font-weight: 700;
    font-size: 13px;
}
.cta-section {
    margin: 28px auto 0;
    width: min(100% - 36px, 1080px);
    text-align: center;
    border-radius: 34px;
    padding: 38px 18px;
    background: linear-gradient(135deg, #F1F7FF 0%, #FFFFFF 100%);
    border: 1px solid var(--gray-200);
    box-shadow: var(--shadow);
}
.cta-section h2 { font-size: clamp(28px, 7vw, 46px); margin: 0 0 10px; letter-spacing: -0.04em; }
.cta-section p { margin: 0 auto 20px; max-width: 700px; color: var(--gray-500); }
.download-page-card { max-width: 980px; margin: 0 auto; }

/* footer */
.site-footer {
    background: #F7FAFF;
    border-top: 1px solid var(--gray-200);
    padding: 34px 18px 22px;
}
.footer-inner {
    width: min(100% - 0px, 1180px);
    margin: 0 auto;
    display: grid;
    gap: 24px;
}
.footer-brand p { max-width: 520px; color: var(--gray-500); margin: 12px 0 0; }
.footer-logo img { width: 34px; height: 34px; }
.footer-links { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; }
.footer-links a { color: var(--gray-700); background: #fff; border: 1px solid var(--gray-200); border-radius: 14px; padding: 10px 12px; }
.footer-bottom { width: min(100% - 0px, 1180px); margin: 26px auto 0; color: var(--gray-500); font-size: 13px; }

@media (min-width: 640px) {
    .highlight-bar { grid-template-columns: repeat(2, 1fr); }
    .process-steps, .risk-grid, .category-grid, .faq-grid, .download-steps { grid-template-columns: repeat(2, 1fr); }
    .app-category-center { grid-template-columns: repeat(2, 1fr); }
    .article-main { padding: 30px; }
}
@media (min-width: 900px) {
    .nav-toggle-label { display: none; }
    .site-nav { display: flex; align-items: center; gap: 2px; }
    .launch-hero { padding: 74px 18px 50px; }
    .launch-hero .content-container { grid-template-columns: 1.02fr .98fr; gap: 54px; }
    .highlight-bar { grid-template-columns: repeat(3, 1fr); }
    .big-feature-card { grid-template-columns: 1fr 1fr; padding: 38px; gap: 40px; }
    .big-feature-card.reverse .feature-copy { order: 2; }
    .big-feature-card.reverse .feature-image { order: 1; }
    .app-category-center { 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; }
    .footer-inner { grid-template-columns: 1fr 1fr; align-items: start; }
    .footer-links { grid-template-columns: repeat(3, 1fr); }
}
@media (min-width: 1120px) {
    .hero-copy h1 { font-size: 76px; }
    .hero-visual { min-height: 520px; }
    .hero-visual img { max-height: 460px; }
    .process-steps { grid-template-columns: repeat(6, 1fr); }
    .process-steps .step-card { padding: 18px; }
}
@media (max-width: 420px) {
    .content-container, .container, .article-layout, .cta-section { width: min(100% - 24px, var(--container)); }
    .download-btn { width: 100%; }
    .hero-actions { width: 100%; }
    .nav-toggle:checked ~ .site-nav { grid-template-columns: 1fr; }
    .hero-visual { min-height: 360px; }
    .float-tag { font-size: 12px; }
}