:root {
    --primary: #2980FE;
    --primary-soft: #EAF3FF;
    --primary-light: #F5F9FF;
    --text: #1F2937;
    --muted: #64748B;
    --border: #E2E8F0;
    --line: #EEF2F7;
    --bg: #F7FAFD;
    --white: #FFFFFF;
    --gray: #F3F6FA;
    --shadow: 0 18px 45px rgba(41, 128, 254, 0.10);
    --shadow-card: 0 12px 30px rgba(15, 23, 42, 0.07);
    --radius-xl: 28px;
    --radius-lg: 22px;
    --radius-md: 18px;
}

* {
    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%, #F7FAFD 44%, #FFFFFF 100%);
    line-height: 1.72;
    overflow-x: hidden;
}

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

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

p {
    margin: 0 0 16px;
}

ul, ol {
    padding-left: 22px;
    margin: 0;
}

li {
    margin: 8px 0;
}

.container {
    width: min(100% - 32px, 1180px);
    margin: 0 auto;
}

.narrow-container {
    width: min(100% - 32px, 920px);
    margin: 0 auto;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(255,255,255,0.92);
    border-bottom: 1px solid rgba(226,232,240,0.86);
    backdrop-filter: blur(16px);
}

.header-inner {
    width: min(100% - 28px, 1180px);
    min-height: 72px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
}

.logo {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-weight: 800;
    color: #0F172A;
    letter-spacing: -0.02em;
    white-space: nowrap;
}

.logo img,
.footer-brand img {
    width: 38px;
    height: 38px;
    border-radius: 12px;
    object-fit: contain;
    background: var(--primary-soft);
}

.site-nav {
    display: none;
    position: absolute;
    top: 72px;
    left: 14px;
    right: 14px;
    padding: 12px;
    border: 1px solid var(--border);
    border-radius: 18px;
    background: var(--white);
    box-shadow: var(--shadow-card);
}

.site-nav.is-open {
    display: grid;
    gap: 4px;
}

.site-nav a {
    display: block;
    padding: 10px 12px;
    border-radius: 12px;
    color: var(--muted);
    font-weight: 650;
    font-size: 14px;
}

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

.nav-toggle {
    width: 42px;
    height: 42px;
    border: 1px solid var(--border);
    border-radius: 14px;
    background: var(--white);
    color: var(--text);
    font-size: 20px;
    cursor: pointer;
}

.section {
    padding: 64px 0;
}

.section.compact {
    padding: 42px 0;
}

.section-title {
    max-width: 760px;
    margin-bottom: 28px;
}

.section-title.center {
    margin-left: auto;
    margin-right: auto;
    text-align: center;
}

.section-title h2 {
    margin: 0 0 12px;
    font-size: clamp(28px, 4vw, 44px);
    line-height: 1.18;
    letter-spacing: -0.04em;
}

.section-title p,
.lead {
    color: var(--muted);
    font-size: 17px;
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    margin-bottom: 14px;
    padding: 7px 12px;
    border: 1px solid rgba(41,128,254,0.16);
    border-radius: 999px;
    background: var(--primary-soft);
    color: var(--primary);
    font-size: 13px;
    font-weight: 760;
}

.app-hero {
    position: relative;
    padding: 62px 0 34px;
    overflow: hidden;
}

.app-hero::before {
    content: "";
    position: absolute;
    width: 540px;
    height: 540px;
    right: -220px;
    top: -220px;
    background: radial-gradient(circle, rgba(41,128,254,0.20), rgba(41,128,254,0.00) 68%);
    pointer-events: none;
}

.app-hero .hero-grid {
    position: relative;
    display: grid;
    gap: 32px;
    align-items: center;
}

.hero-copy h1,
.page-hero h1 {
    margin: 0 0 18px;
    font-size: clamp(36px, 8vw, 68px);
    line-height: 1.05;
    letter-spacing: -0.06em;
    color: #0F172A;
}

.hero-copy p {
    color: var(--muted);
    font-size: 18px;
    max-width: 660px;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 14px;
    margin-top: 26px;
}

.download-btn {
    display: inline-flex;
    min-height: 50px;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 13px 24px;
    border: 1px solid var(--primary);
    border-radius: 999px;
    background: var(--primary);
    color: #FFFFFF;
    font-weight: 800;
    letter-spacing: 0.02em;
    box-shadow: 0 12px 28px rgba(41, 128, 254, 0.24);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.download-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 18px 36px rgba(41, 128, 254, 0.28);
}

.safe-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 22px;
}

.safe-tags span {
    padding: 8px 12px;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: rgba(255,255,255,0.78);
    color: #475569;
    font-size: 13px;
    font-weight: 700;
}

.app-visual {
    position: relative;
    min-height: 460px;
    display: grid;
    place-items: center;
    padding: 28px;
    border: 1px solid rgba(226,232,240,0.9);
    border-radius: 34px;
    background: linear-gradient(160deg, #FFFFFF 0%, #EEF6FF 100%);
    box-shadow: var(--shadow);
}

.app-visual::before {
    content: "";
    position: absolute;
    inset: 24px;
    border: 1px dashed rgba(41,128,254,0.22);
    border-radius: 30px;
}

.app-visual .phone-shot {
    position: relative;
    z-index: 2;
    max-height: 420px;
    object-fit: contain;
    filter: drop-shadow(0 22px 35px rgba(15, 23, 42, 0.14));
}

.floating-card {
    position: relative;
    z-index: 3;
    width: 100%;
    margin-top: 12px;
    padding: 14px;
    border: 1px solid var(--border);
    border-radius: 18px;
    background: rgba(255,255,255,0.94);
    box-shadow: var(--shadow-card);
}

.floating-card strong {
    display: block;
    color: #0F172A;
    font-size: 14px;
}

.floating-card span {
    display: block;
    color: var(--muted);
    font-size: 12px;
}

.float-stack {
    position: relative;
    z-index: 4;
    display: grid;
    width: 100%;
    gap: 10px;
}

.ability-bar {
    display: grid;
    grid-template-columns: 1fr;
    gap: 12px;
    padding: 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    background: rgba(255,255,255,0.86);
    box-shadow: var(--shadow-card);
}

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

.ability-item::before {
    content: "";
    display: block;
    width: 34px;
    height: 4px;
    margin-bottom: 12px;
    border-radius: 999px;
    background: var(--primary);
}

.ability-item h3 {
    margin: 0 0 4px;
    font-size: 17px;
}

.ability-item p {
    margin: 0;
    color: var(--muted);
    font-size: 14px;
}

.feature-showcase {
    display: grid;
    gap: 18px;
}

.showcase-card,
.feature-card,
.info-card,
.step-card,
.risk-card,
.faq-item,
.article-card {
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    background: var(--white);
    box-shadow: var(--shadow-card);
}

.showcase-card {
    overflow: hidden;
    display: grid;
    gap: 16px;
    padding: 22px;
}

.showcase-card .thumb {
    display: grid;
    min-height: 220px;
    place-items: center;
    border-radius: 22px;
    background: linear-gradient(145deg, #F6FAFF, #EAF3FF);
    overflow: hidden;
}

.showcase-card img {
    max-height: 220px;
    object-fit: contain;
}

.showcase-card h3 {
    margin: 0 0 8px;
    font-size: 23px;
    letter-spacing: -0.03em;
}

.showcase-card p {
    color: var(--muted);
}

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

.product-section {
    display: grid;
    gap: 26px;
    align-items: center;
    padding: 26px;
    border: 1px solid var(--border);
    border-radius: 34px;
    background: var(--white);
    box-shadow: var(--shadow-card);
}

.product-section.alt,
.cold-wallet-panel {
    background: linear-gradient(145deg, #F8FBFF 0%, #EFF6FF 100%);
}

.product-section .visual-box {
    display: grid;
    place-items: center;
    min-height: 260px;
    padding: 18px;
    border-radius: 26px;
    background: #FFFFFF;
    border: 1px solid var(--line);
}

.product-section .visual-box img {
    max-height: 340px;
    object-fit: contain;
}

.feature-list {
    display: grid;
    gap: 10px;
    margin: 18px 0;
}

.feature-list span,
.check-list li {
    padding: 10px 12px;
    border-radius: 14px;
    background: var(--primary-light);
    color: #334155;
    border: 1px solid var(--line);
}

.split-panel {
    display: grid;
    gap: 18px;
}

.safety-panel {
    padding: 22px;
    border: 1px solid rgba(41,128,254,0.18);
    border-radius: var(--radius-lg);
    background: linear-gradient(145deg, #FFFFFF, #F3F8FF);
}

.safety-panel h3 {
    margin-top: 0;
}

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

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

.step-card .num {
    display: inline-flex;
    width: 34px;
    height: 34px;
    align-items: center;
    justify-content: center;
    margin-bottom: 12px;
    border-radius: 12px;
    background: var(--primary);
    color: white;
    font-weight: 800;
}

.step-card h3,
.risk-card h3,
.info-card h3,
.article-card h3 {
    margin: 0 0 8px;
    letter-spacing: -0.02em;
}

.risk-grid,
.ecosystem-grid,
.category-grid,
.info-grid {
    display: grid;
    gap: 16px;
}

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

.risk-card p,
.step-card p,
.info-card p,
.article-card p {
    color: var(--muted);
}

.risk-card .suggestion {
    padding: 10px 12px;
    border-radius: 14px;
    background: var(--gray);
    color: #334155;
    font-size: 14px;
}

.info-card,
.feature-card,
.article-card {
    padding: 22px;
}

.ecosystem-grid .info-card:nth-child(3n+1) {
    background: linear-gradient(145deg, #FFFFFF, #F6FAFF);
}

.faq-list {
    display: grid;
    gap: 12px;
}

.faq-item {
    padding: 20px;
}

.faq-item h3 {
    margin: 0 0 8px;
    font-size: 18px;
}

.faq-item p {
    color: var(--muted);
    margin: 0;
}

.cta-section {
    text-align: center;
    padding: 42px 22px;
    border: 1px solid rgba(41,128,254,0.18);
    border-radius: 34px;
    background: linear-gradient(145deg, #FFFFFF 0%, #EDF6FF 100%);
    box-shadow: var(--shadow-card);
}

.cta-section h2 {
    margin: 0 0 12px;
    font-size: clamp(28px, 5vw, 44px);
    line-height: 1.18;
    letter-spacing: -0.04em;
}

.cta-section p {
    max-width: 720px;
    margin: 0 auto 22px;
    color: var(--muted);
}

.page-hero {
    padding: 54px 0 28px;
    background: radial-gradient(circle at top right, rgba(41,128,254,0.14), transparent 44%), linear-gradient(180deg, #FFFFFF 0%, #F7FAFD 100%);
}

.page-hero .lead {
    max-width: 790px;
}

.page-layout {
    display: grid;
    gap: 24px;
    align-items: start;
}

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

.content-panel h2 {
    margin-top: 0;
    letter-spacing: -0.03em;
}

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

.note-box {
    padding: 18px;
    border-radius: 20px;
    background: var(--primary-light);
    border: 1px solid rgba(41,128,254,0.16);
}

.note-box strong {
    display: block;
    margin-bottom: 8px;
    color: #0F172A;
}

.check-list {
    display: grid;
    gap: 10px;
    list-style: none;
    padding: 0;
    margin: 16px 0;
}

.download-panel {
    margin-top: 24px;
    padding: 22px;
    border: 1px solid var(--border);
    border-radius: 24px;
    background: linear-gradient(145deg, #FFFFFF, #F4F9FF);
}

.download-panel p {
    color: var(--muted);
}

.download-steps {
    counter-reset: step;
    display: grid;
    gap: 12px;
    margin: 24px 0;
}

.download-steps .step-card {
    padding-left: 20px;
}

.about-values {
    display: grid;
    gap: 16px;
}

.site-footer {
    margin-top: 56px;
    padding: 48px 0 24px;
    background: #0F172A;
    color: #CBD5E1;
}

.footer-grid {
    display: grid;
    gap: 24px;
}

.footer-brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 14px;
    color: #FFFFFF;
    font-weight: 800;
}

.site-footer h3 {
    margin: 0 0 12px;
    color: #FFFFFF;
    font-size: 16px;
}

.site-footer a {
    display: block;
    margin: 8px 0;
    color: #CBD5E1;
}

.site-footer a:hover {
    color: #FFFFFF;
}

.footer-bottom {
    width: min(100% - 32px, 1180px);
    margin: 32px auto 0;
    padding-top: 18px;
    border-top: 1px solid rgba(255,255,255,0.12);
    color: #94A3B8;
    font-size: 13px;
}

@media (min-width: 620px) {
    .ability-bar,
    .info-grid,
    .category-grid,
    .ecosystem-grid,
    .risk-grid,
    .process-steps {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .feature-showcase {
        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;
        border-radius: 0;
        background: transparent;
        box-shadow: none;
    }

    .site-nav a {
        padding: 9px 11px;
        font-size: 14px;
    }

    .app-hero {
        padding: 92px 0 46px;
    }

    .app-hero .hero-grid {
        grid-template-columns: minmax(0, 1.02fr) minmax(420px, 0.98fr);
        gap: 42px;
    }

    .app-visual {
        min-height: 570px;
    }

    .float-stack {
        position: absolute;
        inset: 0;
        pointer-events: none;
    }

    .floating-card {
        position: absolute;
        width: 190px;
        margin: 0;
    }

    .floating-card:nth-child(1) { left: 22px; top: 58px; }
    .floating-card:nth-child(2) { right: 24px; top: 92px; }
    .floating-card:nth-child(3) { left: 34px; bottom: 72px; }
    .floating-card:nth-child(4) { right: 36px; bottom: 52px; }

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

    .product-section {
        grid-template-columns: 1fr 0.95fr;
        padding: 36px;
    }

    .product-section.reverse {
        grid-template-columns: 0.95fr 1fr;
    }

    .product-section.reverse .visual-box {
        order: -1;
    }

    .split-panel {
        grid-template-columns: 1fr 1fr;
    }

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

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

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

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

    .footer-grid {
        grid-template-columns: 1.4fr repeat(3, 1fr);
    }
}

@media (min-width: 1120px) {
    .feature-showcase {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 430px) {
    .container,
    .narrow-container,
    .header-inner,
    .footer-bottom {
        width: min(100% - 24px, 1180px);
    }

    .hero-actions .download-btn,
    .download-panel .download-btn,
    .cta-section .download-btn {
        width: 100%;
    }

    .app-visual {
        min-height: auto;
        padding: 18px;
    }

    .section {
        padding: 48px 0;
    }
}