:root {
    --primary: #2980FE;
    --primary-dark: #1767d8;
    --ink: #1f2937;
    --muted: #667085;
    --soft: #f5f8fd;
    --soft-blue: #eef6ff;
    --line: #e5ebf3;
    --card: #ffffff;
    --radius: 24px;
    --shadow: 0 18px 50px rgba(41, 128, 254, 0.10);
}

* {
    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(--ink);
    background: linear-gradient(180deg, #ffffff 0%, #f7faff 48%, #ffffff 100%);
    line-height: 1.75;
    overflow-x: hidden;
}

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

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

p {
    margin: 0 0 16px;
    color: var(--muted);
}

h1, h2, h3 {
    color: var(--ink);
    line-height: 1.18;
    margin: 0 0 18px;
    letter-spacing: -0.02em;
}

h1 {
    font-size: clamp(34px, 8vw, 68px);
}

h2 {
    font-size: clamp(28px, 5vw, 44px);
}

h3 {
    font-size: 21px;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(18px);
    border-bottom: 1px solid rgba(229, 235, 243, 0.88);
}

.header-inner {
    width: min(1180px, calc(100% - 32px));
    margin: 0 auto;
    min-height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-weight: 800;
    color: var(--ink);
}

.brand-logo {
    width: 38px;
    height: 38px;
    object-fit: contain;
}

.brand-text {
    font-size: 18px;
    letter-spacing: -0.01em;
}

.nav-toggle {
    display: inline-flex;
    width: 44px;
    height: 44px;
    border: 1px solid var(--line);
    border-radius: 14px;
    background: #fff;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 5px;
}

.nav-toggle span {
    width: 18px;
    height: 2px;
    background: var(--ink);
    border-radius: 10px;
}

.site-nav {
    position: absolute;
    left: 16px;
    right: 16px;
    top: 76px;
    display: none;
    flex-direction: column;
    padding: 16px;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 20px;
    box-shadow: var(--shadow);
}

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

.site-nav a {
    padding: 11px 12px;
    border-radius: 12px;
    color: #4b5563;
    font-weight: 650;
}

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

.section,
.page-hero,
.app-hero,
.cta-section {
    width: min(1180px, calc(100% - 32px));
    margin: 0 auto;
}

.app-hero {
    padding: 54px 0 34px;
    display: grid;
    grid-template-columns: 1fr;
    gap: 34px;
    align-items: center;
}

.hero-copy {
    position: relative;
}

.kicker,
.category-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--primary);
    background: var(--soft-blue);
    border: 1px solid rgba(41, 128, 254, 0.16);
    border-radius: 999px;
    padding: 7px 12px;
    font-weight: 750;
    font-size: 14px;
    margin-bottom: 16px;
}

.hero-lead,
.page-summary {
    font-size: 18px;
    color: #536174;
    max-width: 690px;
}

.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 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-dark);
    box-shadow: 0 18px 36px rgba(41, 128, 254, 0.34);
}

.hero-actions {
    margin: 26px 0 20px;
}

.security-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    padding: 0;
    margin: 0;
    list-style: none;
}

.security-tags li {
    padding: 8px 12px;
    border-radius: 999px;
    color: #344054;
    background: #fff;
    border: 1px solid var(--line);
    font-size: 14px;
    box-shadow: 0 8px 20px rgba(31, 41, 55, 0.04);
}

.app-visual {
    position: relative;
    min-height: 430px;
    display: grid;
    place-items: center;
    isolation: isolate;
}

.app-visual::before {
    content: "";
    position: absolute;
    inset: 24px 10px 42px;
    border-radius: 36px;
    background: radial-gradient(circle at 70% 10%, rgba(41, 128, 254, .22), transparent 34%),
                linear-gradient(135deg, #eef6ff, #ffffff);
    z-index: -2;
}

.app-visual::after {
    content: "";
    position: absolute;
    width: 260px;
    height: 260px;
    border-radius: 50%;
    background: rgba(41, 128, 254, .12);
    filter: blur(12px);
    z-index: -1;
}

.product-shot {
    max-height: 420px;
    object-fit: contain;
    filter: drop-shadow(0 28px 48px rgba(31, 41, 55, .16));
}

.floating-card {
    position: static;
    width: 100%;
    margin-top: 12px;
    background: rgba(255, 255, 255, 0.94);
    border: 1px solid var(--line);
    border-radius: 18px;
    padding: 14px;
    box-shadow: 0 12px 32px rgba(31, 41, 55, .08);
}

.float-grid-mobile {
    width: 100%;
    display: grid;
    gap: 12px;
}

.floating-card strong {
    display: block;
    color: var(--ink);
    margin-bottom: 4px;
}

.floating-card span {
    color: var(--muted);
    font-size: 14px;
}

.ability-bar {
    width: min(1180px, calc(100% - 32px));
    margin: 0 auto 46px;
    display: grid;
    grid-template-columns: 1fr;
    gap: 12px;
    padding: 14px;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.ability-item {
    padding: 16px;
    border-radius: 18px;
    background: linear-gradient(180deg, #fff, #f8fbff);
    border: 1px solid #edf2f7;
}

.ability-item b {
    display: block;
    color: var(--primary);
    margin-bottom: 4px;
}

.section {
    padding: 50px 0;
}

.section-head {
    margin-bottom: 26px;
    max-width: 760px;
}

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

.feature-showcase {
    display: grid;
    grid-template-columns: 1fr;
    gap: 18px;
}

.feature-card {
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 22px;
    box-shadow: 0 14px 38px rgba(31, 41, 55, .06);
    display: grid;
    gap: 16px;
    min-height: 100%;
}

.feature-card img {
    width: 100%;
    max-height: 260px;
    object-fit: contain;
    background: var(--soft);
    border-radius: 20px;
    padding: 12px;
}

.text-link {
    display: inline-flex;
    align-items: center;
    color: var(--primary);
    font-weight: 800;
    margin-top: 4px;
}

.product-section {
    display: grid;
    grid-template-columns: 1fr;
    gap: 26px;
    align-items: center;
    padding: 30px;
    border: 1px solid var(--line);
    border-radius: 30px;
    background: #fff;
    box-shadow: 0 16px 42px rgba(31, 41, 55, .06);
}

.product-section.soft {
    background: linear-gradient(135deg, #f3f8ff, #ffffff);
}

.product-section.reverse .product-media {
    order: 0;
}

.product-media img {
    width: 100%;
    max-height: 420px;
    object-fit: contain;
    border-radius: 24px;
    background: var(--soft);
    padding: 12px;
}

.point-list,
.check-list {
    display: grid;
    gap: 10px;
    margin: 20px 0;
    padding: 0;
    list-style: none;
}

.point-list li,
.check-list li {
    position: relative;
    padding: 12px 14px 12px 38px;
    border: 1px solid var(--line);
    background: #fff;
    border-radius: 16px;
    color: #475467;
}

.point-list li::before,
.check-list li::before {
    content: "";
    position: absolute;
    left: 14px;
    top: 18px;
    width: 10px;
    height: 10px;
    background: var(--primary);
    border-radius: 50%;
}

.mini-panels {
    display: grid;
    grid-template-columns: 1fr;
    gap: 14px;
    margin-top: 20px;
}

.mini-panel,
.info-card,
.risk-card,
.category-card,
.step-card,
.faq-item {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 20px;
    padding: 20px;
    box-shadow: 0 10px 28px rgba(31, 41, 55, .045);
}

.mini-panel b,
.info-card b {
    display: block;
    color: var(--ink);
    margin-bottom: 6px;
}

.process-steps {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
}

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

.step-num {
    display: inline-flex;
    width: 38px;
    height: 38px;
    align-items: center;
    justify-content: center;
    border-radius: 13px;
    background: var(--soft-blue);
    color: var(--primary);
    font-weight: 900;
    margin-bottom: 14px;
}

.risk-grid,
.category-grid,
.ecosystem-grid,
.faq-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
}

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

.risk-card small {
    display: inline-block;
    color: var(--primary);
    font-weight: 800;
    margin-top: 10px;
}

.category-card {
    background: linear-gradient(180deg, #fff, #f8fbff);
}

.page-hero {
    padding: 52px 0 22px;
}

.page-layout {
    width: min(1180px, calc(100% - 32px));
    margin: 0 auto;
    padding: 24px 0 70px;
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
}

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

.content-card h2 {
    font-size: clamp(24px, 4vw, 34px);
    margin-top: 18px;
}

.guide-grid,
.notice-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 14px;
    margin: 24px 0;
}

.guide-step {
    border: 1px solid var(--line);
    border-radius: 20px;
    padding: 18px;
    background: #fbfdff;
}

.side-panel {
    display: grid;
    gap: 16px;
    align-content: start;
}

.sticky-card {
    background: linear-gradient(180deg, #eef6ff, #ffffff);
    border: 1px solid rgba(41, 128, 254, .18);
    border-radius: 24px;
    padding: 22px;
}

.download-area {
    margin-top: 28px;
    padding-top: 22px;
    border-top: 1px solid var(--line);
}

.faq-item h3 {
    font-size: 19px;
}

.cta-section {
    margin-top: 38px;
    margin-bottom: 62px;
    text-align: center;
    border: 1px solid rgba(41, 128, 254, .14);
    border-radius: 30px;
    padding: 42px 24px;
    background: radial-gradient(circle at top right, rgba(41, 128, 254, .18), transparent 36%),
                linear-gradient(135deg, #f2f8ff, #ffffff);
    box-shadow: var(--shadow);
}

.site-footer {
    border-top: 1px solid var(--line);
    background: #fff;
}

.footer-inner {
    width: min(1180px, calc(100% - 32px));
    margin: 0 auto;
    padding: 32px 0;
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
}

.footer-brand {
    display: flex;
    gap: 14px;
    align-items: flex-start;
}

.footer-brand img {
    width: 42px;
    height: 42px;
    object-fit: contain;
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.footer-links a {
    color: #536174;
    background: var(--soft);
    border-radius: 999px;
    padding: 8px 12px;
    font-weight: 650;
}

@media (min-width: 640px) {
    .ability-bar,
    .mini-panels,
    .guide-grid,
    .notice-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

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

@media (min-width: 860px) {
    .nav-toggle {
        display: none;
    }

    .site-nav {
        position: static;
        display: flex;
        flex-direction: row;
        align-items: center;
        gap: 2px;
        padding: 0;
        background: transparent;
        border: 0;
        box-shadow: none;
    }

    .site-nav a {
        font-size: 14px;
        padding: 9px 10px;
    }

    .app-hero {
        grid-template-columns: minmax(0, 1.02fr) minmax(360px, .98fr);
        padding: 76px 0 42px;
    }

    .float-grid-mobile {
        position: absolute;
        inset: 0;
        display: block;
        pointer-events: none;
    }

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

    .floating-card.card-assets {
        left: 4px;
        top: 58px;
    }

    .floating-card.card-cold {
        right: 0;
        top: 70px;
    }

    .floating-card.card-swap {
        left: 24px;
        bottom: 54px;
    }

    .floating-card.card-dapp {
        right: 18px;
        bottom: 46px;
    }

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

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

    .product-section {
        grid-template-columns: 1fr 1fr;
        gap: 44px;
        padding: 42px;
    }

    .product-section.reverse .product-media {
        order: -1;
    }

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

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

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

    .page-layout {
        grid-template-columns: minmax(0, 1fr) 330px;
        align-items: start;
    }

    .content-card {
        padding: 36px;
    }

    .side-panel {
        position: sticky;
        top: 96px;
    }

    .footer-inner {
        grid-template-columns: 1.2fr .8fr;
        align-items: center;
    }

    .footer-links {
        justify-content: flex-end;
    }
}

@media (min-width: 1080px) {
    .site-nav a {
        font-size: 15px;
        padding: 9px 12px;
    }
}