:root {
    --primary: #2980FE;
    --primary-dark: #1267dd;
    --primary-soft: #eaf3ff;
    --bg: #f6f9fc;
    --bg-soft: #eef5ff;
    --card: #ffffff;
    --text: #233044;
    --muted: #697386;
    --border: #e3eaf3;
    --gray: #f2f5f9;
    --shadow: 0 18px 45px rgba(41, 128, 254, 0.10);
    --shadow-soft: 0 12px 30px rgba(35, 48, 68, 0.08);
    --radius: 24px;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang TC", "Microsoft JhengHei", Arial, sans-serif;
    color: var(--text);
    background: linear-gradient(180deg, #ffffff 0%, #f7fbff 45%, #ffffff 100%);
    line-height: 1.72;
    overflow-x: hidden;
}

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

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

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

.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(227, 234, 243, 0.9);
}

.header-inner {
    min-height: 72px;
    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: #172033;
}

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

.nav-toggle {
    border: 1px solid var(--border);
    background: #fff;
    color: var(--text);
    width: 44px;
    height: 44px;
    border-radius: 14px;
    font-size: 22px;
    cursor: pointer;
}

.site-nav {
    position: absolute;
    top: 72px;
    left: 16px;
    right: 16px;
    display: none;
    flex-direction: column;
    gap: 8px;
    padding: 14px;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 20px;
    box-shadow: var(--shadow-soft);
}

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

.site-nav a {
    padding: 11px 14px;
    border-radius: 14px;
    color: var(--muted);
    font-size: 15px;
    font-weight: 650;
}

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

.section {
    padding: 64px 0;
}

.section-tight {
    padding: 42px 0;
}

.section-heading {
    max-width: 760px;
    margin: 0 auto 28px;
    text-align: center;
}

.section-heading.align-left {
    margin-left: 0;
    text-align: left;
}

.eyebrow,
.category-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 7px 12px;
    border-radius: 999px;
    background: var(--primary-soft);
    color: var(--primary);
    font-size: 13px;
    font-weight: 800;
    margin-bottom: 14px;
}

h1, h2, h3 {
    color: #172033;
    line-height: 1.18;
    margin: 0 0 14px;
    letter-spacing: -0.035em;
}

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

h2 {
    font-size: clamp(28px, 5.5vw, 44px);
}

h3 {
    font-size: 22px;
}

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

.lead {
    font-size: 18px;
    color: #4f5f75;
}

.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-size: 16px;
    font-weight: 800;
    box-shadow: 0 12px 28px rgba(41, 128, 254, 0.28);
    transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}

.download-btn:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 16px 36px rgba(41, 128, 254, 0.34);
}

.app-hero {
    position: relative;
    padding: 62px 0 44px;
    overflow: hidden;
}

.app-hero::before {
    content: "";
    position: absolute;
    inset: -160px -20% auto auto;
    width: 620px;
    height: 620px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(41, 128, 254, 0.18) 0%, rgba(41, 128, 254, 0) 68%);
    pointer-events: none;
}

.hero-grid {
    position: relative;
    display: grid;
    grid-template-columns: 1fr;
    gap: 34px;
    align-items: center;
}

.hero-copy {
    max-width: 700px;
}

.hero-copy .lead {
    margin-bottom: 24px;
}

.hero-tags,
.security-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 20px;
}

.hero-tags span,
.security-tags span {
    padding: 8px 12px;
    border-radius: 999px;
    background: #fff;
    border: 1px solid var(--border);
    color: #4d5d72;
    font-size: 13px;
    font-weight: 700;
}

.app-visual {
    position: relative;
    min-height: 420px;
    display: grid;
    place-items: center;
    padding: 22px;
    border-radius: 32px;
    background: linear-gradient(145deg, #f4f9ff 0%, #ffffff 52%, #eef6ff 100%);
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
}

.app-visual::after {
    content: "";
    position: absolute;
    width: 72%;
    height: 52%;
    border-radius: 999px;
    background: rgba(41, 128, 254, .11);
    filter: blur(34px);
    bottom: 18px;
    z-index: 0;
}

.app-visual img {
    position: relative;
    z-index: 2;
    max-height: 390px;
    object-fit: contain;
    margin: 0 auto;
}

.floating-card {
    position: relative;
    z-index: 3;
    width: 100%;
    margin-top: 10px;
    padding: 14px 16px;
    border: 1px solid rgba(227, 234, 243, .95);
    border-radius: 18px;
    background: rgba(255, 255, 255, 0.9);
    box-shadow: var(--shadow-soft);
}

.floating-card strong {
    display: block;
    color: #172033;
    margin-bottom: 2px;
}

.floating-card span {
    color: var(--muted);
    font-size: 13px;
}

.ability-bar {
    display: grid;
    grid-template-columns: 1fr;
    gap: 12px;
    padding: 14px;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 28px;
    box-shadow: var(--shadow-soft);
}

.ability-item {
    padding: 16px;
    border-radius: 20px;
    background: linear-gradient(180deg, #ffffff, #f8fbff);
    border: 1px solid var(--border);
}

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

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

.feature-showcase,
.category-grid,
.ecosystem-grid,
.risk-grid,
.faq-grid,
.card-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 18px;
}

.feature-card,
.category-card,
.risk-card,
.faq-item,
.info-card,
.step-card,
.check-card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-soft);
}

.feature-card {
    overflow: hidden;
    display: grid;
    gap: 18px;
    padding: 22px;
}

.feature-card img {
    width: 100%;
    min-height: 180px;
    max-height: 260px;
    object-fit: contain;
    border-radius: 22px;
    background: var(--bg-soft);
    padding: 16px;
}

.feature-card a:not(.download-btn),
.text-link {
    color: var(--primary);
    font-weight: 800;
}

.product-section {
    padding: 64px 0;
}

.panel,
.wallet-panel,
.cold-wallet-panel,
.swap-panel,
.dapp-panel {
    display: grid;
    grid-template-columns: 1fr;
    gap: 28px;
    align-items: center;
    padding: 26px;
    border: 1px solid var(--border);
    border-radius: 32px;
    background: #fff;
    box-shadow: var(--shadow-soft);
}

.cold-wallet-panel {
    background: linear-gradient(145deg, #f5f9ff, #ffffff);
}

.swap-panel {
    background: linear-gradient(145deg, #ffffff, #f8fbff);
}

.dapp-panel {
    background: linear-gradient(145deg, #f6faff, #ffffff 58%, #f3f8ff);
}

.panel-image {
    border-radius: 28px;
    background: var(--bg-soft);
    padding: 20px;
    border: 1px solid var(--border);
}

.panel-image img {
    max-height: 360px;
    margin: 0 auto;
    object-fit: contain;
}

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

.feature-list li,
.check-list li,
.page-list li {
    position: relative;
    padding: 12px 14px 12px 42px;
    border-radius: 16px;
    background: #f7faff;
    border: 1px solid var(--border);
    color: #46566d;
}

.feature-list li::before,
.check-list li::before,
.page-list li::before {
    content: "✓";
    position: absolute;
    left: 14px;
    top: 11px;
    width: 20px;
    height: 20px;
    display: grid;
    place-items: center;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
    font-size: 12px;
    font-weight: 900;
}

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

.step-card {
    padding: 20px;
}

.step-card .step-no {
    display: inline-grid;
    place-items: center;
    width: 36px;
    height: 36px;
    border-radius: 14px;
    background: var(--primary);
    color: #fff;
    font-weight: 900;
    margin-bottom: 14px;
}

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

.risk-card small {
    display: inline-block;
    color: var(--primary);
    font-weight: 800;
    margin-top: 8px;
}

.category-card {
    padding: 20px;
    min-height: 170px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.category-card .icon-dot,
.info-card .icon-dot {
    width: 38px;
    height: 38px;
    border-radius: 14px;
    background: var(--primary-soft);
    border: 1px solid #d7e9ff;
    margin-bottom: 16px;
    position: relative;
}

.category-card .icon-dot::after,
.info-card .icon-dot::after {
    content: "";
    position: absolute;
    inset: 11px;
    border-radius: 50%;
    background: var(--primary);
}

.faq-item {
    padding: 20px;
}

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

.cta-section {
    text-align: center;
    padding: 52px 24px;
    border-radius: 34px;
    background: linear-gradient(135deg, #eff6ff 0%, #ffffff 55%, #edf5ff 100%);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-soft);
}

.cta-section p {
    max-width: 720px;
    margin-left: auto;
    margin-right: auto;
}

.page-hero {
    padding: 58px 0 26px;
}

.page-hero .container {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
}

.page-summary {
    padding: 24px;
    border-radius: 28px;
    background: linear-gradient(145deg, #f5f9ff, #ffffff);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-soft);
}

.content-layout {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
    align-items: start;
}

.content-main {
    display: grid;
    gap: 18px;
}

.content-card,
.info-card,
.check-card {
    padding: 24px;
}

.content-card h2 {
    font-size: 28px;
}

.side-panel {
    padding: 22px;
    border-radius: 26px;
    background: #fff;
    border: 1px solid var(--border);
    box-shadow: var(--shadow-soft);
}

.side-panel a {
    display: block;
    padding: 12px 0;
    border-bottom: 1px solid var(--border);
    color: var(--primary);
    font-weight: 750;
}

.side-panel a:last-child {
    border-bottom: none;
}

.download-steps {
    counter-reset: download;
    display: grid;
    gap: 14px;
    margin: 22px 0;
}

.download-steps div {
    counter-increment: download;
    padding: 18px 18px 18px 62px;
    position: relative;
    border-radius: 20px;
    background: #fff;
    border: 1px solid var(--border);
    box-shadow: var(--shadow-soft);
}

.download-steps div::before {
    content: counter(download);
    position: absolute;
    left: 18px;
    top: 18px;
    width: 30px;
    height: 30px;
    border-radius: 12px;
    display: grid;
    place-items: center;
    background: var(--primary);
    color: #fff;
    font-weight: 900;
}

.about-mission {
    display: grid;
    grid-template-columns: 1fr;
    gap: 18px;
}

.about-card {
    padding: 24px;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 26px;
    box-shadow: var(--shadow-soft);
}

.site-footer {
    margin-top: 54px;
    padding: 48px 0 24px;
    background: #f4f8fd;
    border-top: 1px solid var(--border);
}

.footer-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 28px;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
}

.footer-brand img {
    width: 36px;
    height: 36px;
    border-radius: 12px;
}

.site-footer h3 {
    font-size: 16px;
    margin-bottom: 12px;
}

.site-footer a {
    display: block;
    color: var(--muted);
    margin-bottom: 8px;
}

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

.footer-bottom {
    margin-top: 32px;
    padding-top: 20px;
    border-top: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    gap: 8px;
    color: var(--muted);
    font-size: 14px;
}

@media (min-width: 640px) {
    .ability-bar,
    .category-grid,
    .ecosystem-grid,
    .risk-grid,
    .faq-grid,
    .card-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;
        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 11px;
    }

    .app-hero {
        padding: 86px 0 58px;
    }

    .hero-grid {
        grid-template-columns: 1.02fr .98fr;
        gap: 44px;
    }

    .app-visual {
        min-height: 560px;
        padding: 32px;
    }

    .app-visual img {
        max-height: 455px;
    }

    .floating-card {
        position: absolute;
        width: 210px;
        margin-top: 0;
    }

    .floating-card.card-assets { left: -10px; top: 80px; }
    .floating-card.card-cold { right: 8px; top: 64px; }
    .floating-card.card-swap { left: 26px; bottom: 82px; }
    .floating-card.card-dapp { right: -6px; bottom: 104px; }

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

    .wallet-panel,
    .cold-wallet-panel,
    .swap-panel,
    .dapp-panel,
    .panel {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        padding: 38px;
    }

    .cold-wallet-panel .panel-image,
    .dapp-panel .panel-image {
        order: -1;
    }

    .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));
    }

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

    .page-hero .container {
        grid-template-columns: 1.2fr .8fr;
        align-items: center;
    }

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

    .side-panel {
        position: sticky;
        top: 92px;
    }

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

    .footer-grid {
        grid-template-columns: 1.5fr repeat(3, 1fr);
    }

    .footer-bottom {
        flex-direction: row;
        justify-content: space-between;
    }
}

@media (min-width: 1100px) {
    .site-nav a {
        padding: 10px 14px;
    }
}