:root {
    --primary: #2980FE;
    --primary-deep: #1766da;
    --blue-soft: #eef6ff;
    --blue-faint: #f5f9ff;
    --white: #ffffff;
    --gray-50: #f8fafc;
    --gray-100: #edf1f7;
    --gray-200: #dfe6ef;
    --gray-500: #667085;
    --gray-700: #344054;
    --gray-900: #101828;
    --shadow: 0 18px 48px rgba(31, 91, 179, 0.10);
    --shadow-soft: 0 10px 28px rgba(16, 24, 40, 0.07);
    --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", "Microsoft JhengHei", Arial, sans-serif;
    color: var(--gray-900);
    background: linear-gradient(180deg, var(--white) 0%, var(--blue-faint) 36%, var(--white) 100%);
    line-height: 1.75;
    overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
p { margin: 0 0 16px; color: var(--gray-500); }
h1, h2, h3 { margin: 0; line-height: 1.25; color: var(--gray-900); }
ul, ol { margin: 0; padding-left: 20px; color: var(--gray-500); }

.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255,255,255,0.92);
    backdrop-filter: blur(18px);
    border-bottom: 1px solid rgba(223, 230, 239, 0.85);
}
.header-shell,
.section,
.footer-shell,
.footer-bottom {
    width: min(1120px, calc(100% - 32px));
    margin: 0 auto;
}
.header-shell {
    min-height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
}
.logo,
.footer-logo {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-weight: 800;
    letter-spacing: 0.02em;
}
.logo img,
.footer-logo img { width: 38px; height: 38px; object-fit: contain; }
.site-nav {
    position: absolute;
    top: 72px;
    left: 16px;
    right: 16px;
    display: none;
    padding: 14px;
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-soft);
}
.site-nav.open { display: grid; gap: 6px; }
.site-nav a {
    padding: 10px 12px;
    border-radius: 999px;
    color: var(--gray-700);
    font-size: 14px;
    font-weight: 650;
}
.site-nav a:hover,
.site-nav a.active { color: var(--primary); background: var(--blue-soft); }
.nav-toggle {
    width: 44px;
    height: 44px;
    border: 1px solid var(--gray-200);
    border-radius: 14px;
    background: var(--white);
    display: inline-grid;
    place-items: center;
    gap: 4px;
    cursor: pointer;
}
.nav-toggle span { width: 18px; height: 2px; background: var(--gray-900); border-radius: 4px; }

.section { padding: 56px 0; }
.section-tight { padding: 36px 0; }
.section-head { margin-bottom: 24px; max-width: 720px; }
.section-head.center { text-align: center; margin-left: auto; margin-right: auto; }
.eyebrow,
.category-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 14px;
    padding: 7px 12px;
    border-radius: 999px;
    background: var(--blue-soft);
    color: var(--primary);
    font-size: 13px;
    font-weight: 800;
}
.section-head h2,
.page-hero h1 { font-size: clamp(28px, 5vw, 46px); margin-bottom: 14px; }
.section-head p,
.page-hero p { font-size: 16px; }

.download-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 13px 24px;
    border-radius: 999px;
    background: var(--primary);
    color: var(--white);
    font-weight: 800;
    border: 1px solid var(--primary);
    box-shadow: 0 14px 30px rgba(41, 128, 254, 0.28);
    transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}
.download-btn:hover { transform: translateY(-2px); background: var(--primary-deep); box-shadow: 0 18px 36px rgba(41, 128, 254, 0.34); }
.link-arrow { color: var(--primary); font-weight: 800; display: inline-flex; align-items: center; margin-top: 6px; }
.link-arrow::after { content: '→'; margin-left: 6px; }

.portal-hero {
    position: relative;
    padding: 44px 0 30px;
    overflow: hidden;
}
.portal-hero::before {
    content: '';
    position: absolute;
    inset: -120px -20% auto auto;
    width: 420px;
    height: 420px;
    border-radius: 999px;
    background: radial-gradient(circle, rgba(41,128,254,.18), rgba(41,128,254,0));
    pointer-events: none;
}
.portal-grid {
    width: min(1120px, calc(100% - 32px));
    margin: 0 auto;
    display: grid;
    gap: 32px;
    align-items: center;
}
.hero-copy h1 {
    font-size: clamp(34px, 9vw, 64px);
    letter-spacing: -0.045em;
    margin-bottom: 18px;
}
.hero-copy p { font-size: 17px; max-width: 620px; }
.hero-actions { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; margin: 24px 0 18px; }
.safety-tags { display: flex; flex-wrap: wrap; gap: 10px; }
.safety-tags span {
    padding: 8px 12px;
    border: 1px solid var(--gray-200);
    border-radius: 999px;
    background: rgba(255,255,255,.78);
    color: var(--gray-700);
    font-size: 13px;
    font-weight: 700;
}
.hero-visual {
    position: relative;
    min-height: 430px;
    display: grid;
    place-items: center;
    border-radius: 36px;
    background: linear-gradient(145deg, var(--white), #eaf3ff 68%, #dcecff);
    box-shadow: var(--shadow);
    border: 1px solid rgba(41,128,254,.12);
    overflow: hidden;
}
.hero-visual img.product-main { width: min(360px, 82%); margin: auto; filter: drop-shadow(0 26px 36px rgba(16, 24, 40, .14)); }
.float-card,
.status-card {
    position: absolute;
    background: rgba(255,255,255,.86);
    border: 1px solid rgba(223,230,239,.85);
    border-radius: 18px;
    box-shadow: var(--shadow-soft);
    padding: 12px 14px;
    backdrop-filter: blur(12px);
    color: var(--gray-700);
    font-size: 13px;
    font-weight: 700;
}
.status-card { left: 18px; bottom: 20px; width: 184px; }
.status-card b { display: block; color: var(--gray-900); font-size: 18px; }
.float-one { right: 16px; top: 42px; }
.float-two { left: 20px; top: 84px; }
.float-three { right: 26px; bottom: 54px; }

.channel-nav { display: grid; grid-template-columns: repeat(1, minmax(0, 1fr)); gap: 14px; }
.channel-card,
.feature-card,
.category-card,
.risk-card,
.faq-item,
.info-card,
.step-card,
.download-panel,
.article-card {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-soft);
}
.channel-card { padding: 18px; display: grid; gap: 8px; }
.channel-card .pill,
.card-label {
    width: fit-content;
    padding: 4px 9px;
    border-radius: 999px;
    background: var(--blue-soft);
    color: var(--primary);
    font-size: 12px;
    font-weight: 800;
}
.channel-card h3 { font-size: 18px; }
.channel-card p { font-size: 14px; margin: 0; }

.split-feature {
    display: grid;
    gap: 24px;
    align-items: center;
    padding: 24px;
    border-radius: 32px;
    background: var(--white);
    border: 1px solid var(--gray-200);
    box-shadow: var(--shadow-soft);
}
.split-feature.soft { background: linear-gradient(135deg, #f6faff, #ffffff); }
.feature-copy h2 { font-size: clamp(26px, 5vw, 40px); margin: 10px 0 14px; }
.feature-list { display: grid; gap: 10px; margin: 18px 0; padding: 0; list-style: none; }
.feature-list li {
    position: relative;
    padding-left: 28px;
    color: var(--gray-700);
}
.feature-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 10px;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--primary);
    box-shadow: 0 0 0 5px var(--blue-soft);
}
.feature-media {
    border-radius: 28px;
    background: linear-gradient(145deg, var(--blue-soft), var(--white));
    padding: 24px;
    min-height: 280px;
    display: grid;
    place-items: center;
    overflow: hidden;
}
.feature-media img { max-height: 390px; object-fit: contain; filter: drop-shadow(0 18px 28px rgba(16,24,40,.14)); }
.wallet-section .feature-media { background: linear-gradient(145deg, #f2f7ff, #ffffff); }
.cold-wallet-section .feature-media { background: linear-gradient(145deg, #edf5ff, #f9fbff); }
.swap-section .feature-media { background: linear-gradient(145deg, #f6f9ff, #eaf3ff); }
.dapp-section .feature-media { background: linear-gradient(145deg, #eef6ff, #ffffff); }

.process-steps,
.risk-grid,
.category-grid,
.faq-grid,
.card-grid,
.check-grid {
    display: grid;
    gap: 16px;
}
.step-card { padding: 20px; position: relative; overflow: hidden; }
.step-card .num {
    display: inline-grid;
    place-items: center;
    width: 36px;
    height: 36px;
    border-radius: 12px;
    background: var(--primary);
    color: var(--white);
    font-weight: 900;
    margin-bottom: 14px;
}
.step-card h3,
.risk-card h3,
.category-card h3,
.feature-card h3,
.info-card h3 { font-size: 18px; margin-bottom: 8px; }
.step-card p,
.risk-card p,
.category-card p,
.feature-card p,
.info-card p { font-size: 14px; margin: 0 0 8px; }
.risk-card { padding: 20px; border-left: 4px solid var(--primary); }
.risk-card strong { display: block; color: var(--gray-900); margin-bottom: 4px; }
.category-card { padding: 20px; }
.category-card:hover,
.channel-card:hover { border-color: rgba(41,128,254,.35); transform: translateY(-2px); transition: .2s ease; }
.faq-item { padding: 20px; }
.faq-item h3 { font-size: 17px; margin-bottom: 8px; }

.cta-section { padding: 56px 0 72px; }
.download-panel {
    width: min(980px, calc(100% - 32px));
    margin: 0 auto;
    text-align: center;
    padding: 34px 20px;
    border-radius: 34px;
    background: linear-gradient(135deg, #ffffff 0%, #eef6ff 100%);
    position: relative;
    overflow: hidden;
}
.download-panel h2 { font-size: clamp(26px, 5vw, 42px); margin-bottom: 12px; }
.download-panel p { max-width: 720px; margin: 0 auto 22px; }

.page-hero {
    width: min(1120px, calc(100% - 32px));
    margin: 0 auto;
    padding: 52px 0 28px;
}
.page-hero .inner {
    padding: 30px;
    border: 1px solid var(--gray-200);
    border-radius: 34px;
    background: linear-gradient(135deg, #ffffff, #eef6ff);
    box-shadow: var(--shadow-soft);
}
.content-layout {
    width: min(1120px, calc(100% - 32px));
    margin: 0 auto;
    display: grid;
    gap: 22px;
    padding: 20px 0 64px;
}
.article-card { padding: 24px; }
.article-card h2 { font-size: 24px; margin: 8px 0 12px; }
.article-card h3 { font-size: 19px; margin: 18px 0 8px; }
.safety-panel {
    padding: 20px;
    border-radius: var(--radius-md);
    background: var(--blue-soft);
    border: 1px solid rgba(41,128,254,.16);
}
.safety-panel h3 { color: var(--primary); margin-bottom: 8px; }
.info-card { padding: 18px; }
.aside-stack { display: grid; gap: 16px; align-content: start; }
.check-list { display: grid; gap: 10px; padding: 0; list-style: none; margin: 12px 0; }
.check-list li {
    padding: 12px 14px;
    border-radius: 14px;
    background: var(--gray-50);
    border: 1px solid var(--gray-200);
    color: var(--gray-700);
}
.number-list { counter-reset: item; padding: 0; list-style: none; display: grid; gap: 12px; }
.number-list li {
    counter-increment: item;
    padding: 14px 14px 14px 52px;
    border: 1px solid var(--gray-200);
    border-radius: 16px;
    background: var(--white);
    position: relative;
    color: var(--gray-700);
}
.number-list li::before {
    content: counter(item);
    position: absolute;
    left: 14px;
    top: 14px;
    width: 26px;
    height: 26px;
    border-radius: 9px;
    display: grid;
    place-items: center;
    background: var(--primary);
    color: var(--white);
    font-weight: 900;
}
.inline-cta { margin-top: 22px; }

.site-footer { background: #f7faff; border-top: 1px solid var(--gray-200); }
.footer-shell { padding: 42px 0 24px; display: grid; gap: 28px; }
.footer-brand p { max-width: 450px; margin-top: 14px; }
.footer-links { display: grid; gap: 22px; }
.footer-links h3 { font-size: 15px; margin-bottom: 10px; }
.footer-links a { display: block; padding: 4px 0; color: var(--gray-500); font-size: 14px; }
.footer-links a:hover { color: var(--primary); }
.footer-bottom { border-top: 1px solid var(--gray-200); padding: 18px 0 24px; color: var(--gray-500); font-size: 13px; }

@media (min-width: 640px) {
    .channel-nav { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .category-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .risk-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .process-steps { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .faq-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .card-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 900px) {
    .nav-toggle { display: none; }
    .site-nav {
        position: static;
        display: flex;
        align-items: center;
        gap: 2px;
        padding: 0;
        border: 0;
        box-shadow: none;
        background: transparent;
    }
    .portal-hero { padding: 68px 0 36px; }
    .portal-grid { grid-template-columns: 1.02fr .98fr; }
    .hero-visual { min-height: 560px; }
    .channel-nav { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .split-feature { grid-template-columns: 1fr 1fr; padding: 34px; }
    .split-feature.reverse .feature-media { order: -1; }
    .process-steps { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .risk-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .category-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
    .content-layout { grid-template-columns: minmax(0, 1fr) 320px; }
    .footer-shell { grid-template-columns: 1fr 1.35fr; }
    .footer-links { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (min-width: 1180px) {
    .header-shell,
    .section,
    .portal-grid,
    .page-hero,
    .content-layout,
    .footer-shell,
    .footer-bottom { width: 1120px; }
}