* {
    box-sizing: border-box;
}

:root {
    --primary: #2980FE;
    --primary-dark: #1464da;
    --primary-soft: #ecf4ff;
    --bg: #f7faff;
    --bg-soft: #f2f6fb;
    --white: #ffffff;
    --text: #1f2937;
    --muted: #667085;
    --line: #dfe7f2;
    --shadow: 0 18px 48px rgba(41, 128, 254, 0.12);
    --radius-lg: 28px;
    --radius-md: 22px;
    --radius-sm: 16px;
}

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: var(--bg);
    color: var(--text);
    line-height: 1.75;
    overflow-x: hidden;
}

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

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

p {
    margin: 0 0 16px;
}

ul, ol {
    padding-left: 20px;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    background: rgba(255, 255, 255, 0.92);
    border-bottom: 1px solid var(--line);
    backdrop-filter: blur(16px);
}

.header-inner {
    width: min(1180px, calc(100% - 32px));
    margin: 0 auto;
    min-height: 68px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
}

.site-logo {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-weight: 800;
    color: #162033;
    letter-spacing: 0.01em;
    white-space: nowrap;
}

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

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

.nav-toggle span {
    width: 18px;
    height: 2px;
    background: var(--text);
    border-radius: 999px;
}

.site-nav {
    position: absolute;
    left: 16px;
    right: 16px;
    top: 72px;
    display: none;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: var(--radius-md);
    padding: 14px;
    box-shadow: var(--shadow);
}

.site-nav.is-open {
    display: grid;
}

.site-nav a {
    padding: 10px 12px;
    border-radius: 999px;
    color: #344054;
    font-size: 14px;
    text-align: center;
}

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

main {
    min-height: 70vh;
}

.container,
.portal-hero,
.section,
.page-hero,
.cta-section,
.content-container {
    width: min(1180px, calc(100% - 32px));
    margin-left: auto;
    margin-right: auto;
}

.portal-hero {
    display: grid;
    gap: 28px;
    padding: 44px 0 24px;
}

.hero-copy,
.hero-visual-card,
.page-hero,
.card,
.channel-card,
.feature-card,
.safety-panel,
.faq-item,
.info-box,
.content-card,
.side-panel,
.risk-card,
.step-card,
.category-card {
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    box-shadow: 0 12px 34px rgba(28, 57, 104, 0.06);
}

.hero-copy {
    padding: 30px;
    position: relative;
    overflow: hidden;
}

.hero-copy::after {
    content: "";
    position: absolute;
    inset: auto -60px -80px auto;
    width: 220px;
    height: 220px;
    border-radius: 999px;
    background: radial-gradient(circle, rgba(41,128,254,0.20), rgba(41,128,254,0));
}

.badge,
.category-badge,
.mini-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--primary);
    background: var(--primary-soft);
    border: 1px solid #d7e8ff;
    border-radius: 999px;
    padding: 7px 12px;
    font-size: 13px;
    font-weight: 700;
}

.portal-hero h1,
.page-hero h1 {
    margin: 18px 0 16px;
    font-size: clamp(34px, 8vw, 64px);
    line-height: 1.08;
    letter-spacing: -0.04em;
    color: #142033;
}

.page-hero h1 {
    font-size: clamp(30px, 7vw, 52px);
}

.lead {
    font-size: 17px;
    color: #475467;
    max-width: 680px;
}

.download-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 0 24px;
    border-radius: 999px;
    background: var(--primary);
    color: var(--white);
    font-weight: 800;
    box-shadow: 0 12px 28px rgba(41, 128, 254, 0.26);
    transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
    border: 0;
    cursor: pointer;
}

.download-btn:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 16px 34px rgba(41, 128, 254, 0.34);
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    align-items: center;
    margin-top: 26px;
}

.security-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 24px;
}

.security-tags span {
    display: inline-flex;
    padding: 8px 12px;
    border-radius: 999px;
    background: #f6f9fd;
    color: #344054;
    border: 1px solid var(--line);
    font-size: 13px;
}

.hero-visual-card {
    min-height: 420px;
    padding: 24px;
    position: relative;
    overflow: hidden;
    background: linear-gradient(145deg, #ffffff 0%, #edf5ff 100%);
}

.hero-visual-card::before {
    content: "";
    position: absolute;
    inset: 24px;
    border-radius: 36px;
    background: linear-gradient(135deg, rgba(41,128,254,0.10), rgba(255,255,255,0.2));
}

.hero-phone {
    position: relative;
    z-index: 1;
    width: min(78%, 360px);
    margin: 18px auto 0;
    filter: drop-shadow(0 22px 38px rgba(41,128,254,0.18));
}

.float-card {
    position: relative;
    z-index: 2;
    background: rgba(255,255,255,0.92);
    border: 1px solid rgba(223,231,242,0.9);
    border-radius: 20px;
    padding: 14px;
    box-shadow: 0 12px 28px rgba(28,57,104,0.10);
    color: #344054;
}

.float-card strong {
    display: block;
    color: #142033;
}

.float-card.asset-status {
    max-width: 220px;
}

.float-tags {
    display: grid;
    gap: 10px;
    margin-top: 18px;
}

.float-tags span {
    display: inline-flex;
    justify-content: space-between;
    gap: 10px;
    padding: 10px 12px;
    border-radius: 999px;
    background: rgba(255,255,255,0.86);
    border: 1px solid var(--line);
    color: #475467;
    font-size: 13px;
}

.channel-nav,
.category-grid,
.risk-grid,
.feature-grid,
.faq-grid,
.quick-links-grid {
    display: grid;
    gap: 16px;
}

.channel-nav {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    margin-top: 18px;
}

.channel-card,
.category-card,
.feature-card,
.risk-card,
.step-card {
    padding: 20px;
    transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease;
}

.channel-card:hover,
.category-card:hover,
.feature-card:hover,
.risk-card:hover,
.step-card:hover {
    transform: translateY(-3px);
    border-color: rgba(41, 128, 254, 0.35);
    box-shadow: var(--shadow);
}

.channel-card h3,
.category-card h3,
.feature-card h3,
.risk-card h3,
.step-card h3 {
    margin: 8px 0 8px;
    line-height: 1.3;
    color: #172033;
}

.card-link,
.inline-link {
    display: inline-flex;
    color: var(--primary);
    font-weight: 800;
    margin-top: 8px;
}

.section {
    padding: 42px 0;
}

.section-header {
    margin-bottom: 22px;
    max-width: 780px;
}

.section-header h2 {
    margin: 10px 0;
    font-size: clamp(28px, 5vw, 42px);
    line-height: 1.18;
    letter-spacing: -0.03em;
}

.section-header p {
    color: var(--muted);
}

.split-feature {
    display: grid;
    gap: 24px;
    align-items: center;
    padding: 26px;
    border-radius: 34px;
    border: 1px solid var(--line);
    background: var(--white);
    box-shadow: 0 18px 44px rgba(28,57,104,0.06);
}

.split-feature.alt,
.cold-wallet-split {
    background: linear-gradient(135deg, #f7fbff, #ffffff);
}

.split-copy h2 {
    font-size: clamp(28px, 5vw, 44px);
    line-height: 1.15;
    margin: 0 0 14px;
    letter-spacing: -0.03em;
}

.split-copy p,
.card p,
.channel-card p,
.feature-card p,
.risk-card p,
.step-card p,
.category-card p,
.page-hero p,
.side-panel p,
.info-box p {
    color: var(--muted);
}

.check-list {
    display: grid;
    gap: 10px;
    margin: 18px 0;
    padding: 0;
    list-style: none;
}

.check-list li {
    padding-left: 28px;
    position: relative;
    color: #344054;
}

.check-list li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 9px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--primary);
    box-shadow: 0 0 0 5px var(--primary-soft);
}

.split-visual {
    border-radius: 30px;
    padding: 22px;
    background: linear-gradient(160deg, #eef6ff, #ffffff);
    min-height: 260px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid #dfeeff;
}

.split-visual img {
    max-height: 420px;
    object-fit: contain;
    filter: drop-shadow(0 20px 34px rgba(41,128,254,0.14));
}

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

.step-number {
    display: inline-flex;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--primary);
    color: var(--white);
    align-items: center;
    justify-content: center;
    font-weight: 800;
}

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

.risk-card .risk-action {
    background: var(--primary-soft);
    border-radius: 14px;
    padding: 10px 12px;
    color: #245088;
    margin-top: 12px;
    font-size: 14px;
}

.ecosystem-category .category-grid {
    grid-template-columns: 1fr;
}

.faq-grid {
    grid-template-columns: 1fr;
}

.faq-item {
    padding: 22px;
}

.faq-item h3 {
    margin: 0 0 8px;
    color: #172033;
}

.cta-section {
    margin-top: 36px;
    margin-bottom: 54px;
    padding: 36px 24px;
    text-align: center;
    border: 1px solid #d7e8ff;
    border-radius: 34px;
    background: radial-gradient(circle at top left, rgba(41,128,254,0.16), transparent 34%), linear-gradient(135deg, #ffffff, #edf5ff);
}

.cta-section h2 {
    margin: 0 0 12px;
    font-size: clamp(28px, 5vw, 44px);
}

.cta-section p {
    max-width: 680px;
    margin: 0 auto 24px;
    color: var(--muted);
}

.page-hero {
    margin-top: 34px;
    padding: 30px;
    overflow: hidden;
    position: relative;
}

.page-hero::after {
    content: "";
    position: absolute;
    right: -80px;
    bottom: -80px;
    width: 230px;
    height: 230px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(41,128,254,0.18), transparent 70%);
}

.content-container {
    display: grid;
    gap: 22px;
    padding: 34px 0 56px;
}

.content-card,
.side-panel,
.info-box {
    padding: 24px;
}

.content-card h2,
.side-panel h2,
.info-box h2 {
    margin-top: 0;
    color: #172033;
}

.guide-layout {
    display: grid;
    gap: 22px;
}

.quick-links-grid {
    grid-template-columns: 1fr;
}

.info-box {
    background: linear-gradient(135deg, #ffffff, #f6faff);
    border-left: 4px solid var(--primary);
}

.notice-list {
    display: grid;
    gap: 12px;
    padding: 0;
    list-style: none;
}

.notice-list li {
    background: #f7faff;
    border: 1px solid var(--line);
    border-radius: 16px;
    padding: 14px;
    color: #344054;
}

.download-steps {
    counter-reset: step;
    display: grid;
    gap: 14px;
    padding: 0;
    list-style: none;
}

.download-steps li {
    counter-increment: step;
    border: 1px solid var(--line);
    background: var(--white);
    border-radius: 18px;
    padding: 16px 16px 16px 58px;
    position: relative;
}

.download-steps li::before {
    content: counter(step);
    position: absolute;
    left: 16px;
    top: 16px;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--primary);
    color: #fff;
    font-weight: 800;
}

.site-footer {
    background: #ffffff;
    border-top: 1px solid var(--line);
    padding: 38px 0 24px;
}

.footer-grid {
    width: min(1180px, calc(100% - 32px));
    margin: 0 auto;
    display: grid;
    gap: 24px;
}

.footer-logo {
    font-weight: 900;
    color: #172033;
    font-size: 18px;
    margin-bottom: 10px;
}

.site-footer p {
    color: var(--muted);
}

.site-footer h3 {
    margin: 0 0 12px;
    color: #172033;
}

.site-footer a {
    display: block;
    color: #667085;
    margin: 8px 0;
}

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

.footer-bottom {
    width: min(1180px, calc(100% - 32px));
    margin: 28px auto 0;
    padding-top: 18px;
    border-top: 1px solid var(--line);
    color: #8a96a8;
    font-size: 14px;
}

@media (min-width: 700px) {
    .channel-nav,
    .category-grid,
    .quick-links-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

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

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

    .footer-grid {
        grid-template-columns: 1.4fr 1fr 1fr 1fr;
    }
}

@media (min-width: 980px) {
    .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 a {
        font-size: 14px;
        padding: 8px 12px;
    }

    .portal-hero {
        grid-template-columns: 1.02fr .98fr;
        align-items: stretch;
        padding-top: 62px;
    }

    .hero-copy,
    .hero-visual-card {
        min-height: 580px;
    }

    .hero-copy {
        padding: 48px;
    }

    .float-tags {
        position: absolute;
        right: 28px;
        bottom: 28px;
        width: 230px;
    }

    .channel-nav {
        grid-template-columns: repeat(6, minmax(0, 1fr));
    }

    .split-feature {
        grid-template-columns: 1fr 1fr;
        padding: 38px;
    }

    .split-feature.reverse .split-visual {
        order: -1;
    }

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

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

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

    .guide-layout {
        grid-template-columns: minmax(0, 1fr) 340px;
        align-items: start;
    }

    .content-card,
    .side-panel,
    .info-box,
    .page-hero {
        padding: 34px;
    }
}

@media (max-width: 420px) {
    .container,
    .portal-hero,
    .section,
    .page-hero,
    .cta-section,
    .content-container {
        width: min(100% - 24px, 1180px);
    }

    .channel-nav {
        grid-template-columns: 1fr;
    }

    .hero-copy,
    .page-hero,
    .split-feature,
    .content-card,
    .side-panel,
    .info-box,
    .cta-section {
        border-radius: 22px;
    }

    .download-btn {
        width: 100%;
    }
}