* {
    box-sizing: border-box;
}

:root {
    --primary: #2980FE;
    --primary-dark: #1669de;
    --text: #232a35;
    --muted: #6d7480;
    --line: #e8edf5;
    --soft: #f7f9fc;
    --ice: #eef6ff;
    --white: #ffffff;
    --shadow: 0 18px 45px rgba(21, 75, 150, 0.10);
    --radius: 26px;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", Arial, sans-serif;
    color: var(--text);
    background: linear-gradient(180deg, #ffffff 0%, #f7fbff 45%, #ffffff 100%);
    line-height: 1.75;
    overflow-x: hidden;
}

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

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

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

.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--line);
}

.nav-wrap {
    min-height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
}

.logo,
.footer-brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-weight: 800;
    letter-spacing: 0.02em;
    color: #152033;
}

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

.nav-toggle {
    border: 1px solid var(--line);
    background: var(--white);
    color: var(--primary);
    border-radius: 999px;
    padding: 9px 14px;
    font-weight: 700;
}

.site-nav {
    display: none;
    position: absolute;
    left: 16px;
    right: 16px;
    top: 72px;
    padding: 14px;
    border: 1px solid var(--line);
    background: var(--white);
    border-radius: 22px;
    box-shadow: var(--shadow);
}

.site-nav.is-open {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
}

.site-nav a {
    padding: 10px 12px;
    border-radius: 14px;
    color: #465064;
    font-size: 14px;
    font-weight: 650;
}

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

.launch-hero {
    position: relative;
    overflow: hidden;
    padding: 54px 0 34px;
    background: radial-gradient(circle at 78% 18%, rgba(41, 128, 254, 0.18), transparent 32%), linear-gradient(180deg, #ffffff, #f4f9ff);
}

.launch-hero::before {
    content: "";
    position: absolute;
    width: 420px;
    height: 420px;
    border-radius: 50%;
    background: rgba(41, 128, 254, 0.10);
    left: -220px;
    top: 80px;
}

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

.eyebrow,
.category-badge,
.blue-tag {
    display: inline-flex;
    align-items: center;
    width: fit-content;
    gap: 8px;
    color: var(--primary);
    background: #edf5ff;
    border: 1px solid #dcecff;
    border-radius: 999px;
    padding: 7px 12px;
    font-size: 13px;
    font-weight: 800;
}

.launch-hero h1,
.page-hero h1 {
    font-size: clamp(38px, 11vw, 74px);
    line-height: 1.04;
    letter-spacing: -0.06em;
    margin: 16px 0 18px;
    color: #111c2d;
}

.launch-hero p,
.page-hero p,
.section-lead {
    color: var(--muted);
    font-size: 17px;
    max-width: 680px;
}

.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;
    box-shadow: 0 12px 24px rgba(41, 128, 254, 0.24);
    border: 0;
    transition: transform 0.2s ease, background 0.2s ease, box-shadow 0.2s ease;
}

.download-btn:hover {
    transform: translateY(-2px);
    background: var(--primary-dark);
    box-shadow: 0 16px 28px rgba(41, 128, 254, 0.30);
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 12px;
    margin: 24px 0 18px;
}

.security-tags,
.mini-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    padding: 0;
    margin: 18px 0 0;
    list-style: none;
}

.security-tags li,
.mini-tags span {
    border: 1px solid var(--line);
    background: rgba(255,255,255,.72);
    color: #4a5668;
    border-radius: 999px;
    padding: 8px 12px;
    font-size: 13px;
    font-weight: 650;
}

.app-showcase,
.hero-visual {
    position: relative;
    min-height: 420px;
    border-radius: 32px;
    background: linear-gradient(145deg, rgba(255,255,255,.84), rgba(235,245,255,.88));
    border: 1px solid rgba(206,224,246,.9);
    box-shadow: var(--shadow);
    display: grid;
    place-items: center;
    padding: 24px;
}

.app-showcase img {
    max-height: 470px;
    object-fit: contain;
    filter: drop-shadow(0 26px 34px rgba(41, 128, 254, 0.15));
}

.float-label {
    position: absolute;
    background: rgba(255,255,255,.94);
    border: 1px solid var(--line);
    box-shadow: 0 12px 26px rgba(19, 62, 128, .10);
    border-radius: 18px;
    padding: 9px 12px;
    color: #2f3948;
    font-size: 13px;
    font-weight: 800;
}

.float-label.one { top: 22px; left: 22px; }
.float-label.two { right: 20px; top: 88px; }
.float-label.three { left: 30px; bottom: 72px; }
.float-label.four { right: 24px; bottom: 26px; }

.highlight-bar,
.channel-nav {
    padding: 26px 0 46px;
    background: #f7fbff;
}

.highlight-grid,
.category-grid,
.risk-grid,
.faq-grid,
.footer-grid,
.card-grid {
    display: grid;
    gap: 16px;
}

.highlight-item,
.channel-card,
.category-card,
.risk-card,
.faq-item,
.info-card,
.tip-card,
.step-card,
.safety-panel,
.launch-card {
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: 22px;
    padding: 20px;
    box-shadow: 0 10px 30px rgba(28, 70, 128, 0.06);
}

.highlight-item h3,
.category-card h3,
.risk-card h3,
.faq-item h3,
.info-card h3,
.tip-card h3,
.step-card h3,
.safety-panel h3 {
    margin: 0 0 8px;
    font-size: 18px;
    color: #172235;
}

.highlight-item p,
.category-card p,
.risk-card p,
.faq-item p,
.info-card p,
.tip-card p,
.step-card p,
.safety-panel p {
    margin: 0;
    color: var(--muted);
    font-size: 15px;
}

.card-link,
.text-link {
    display: inline-flex;
    margin-top: 12px;
    color: var(--primary);
    font-weight: 800;
    font-size: 14px;
}

.section {
    padding: 54px 0;
}

.section-head {
    margin-bottom: 22px;
}

.section-head h2 {
    font-size: clamp(28px, 7vw, 48px);
    line-height: 1.12;
    letter-spacing: -0.04em;
    margin: 0 0 12px;
}

.gradient-background {
    background: linear-gradient(180deg, #f7fbff, #ffffff);
}

.big-feature-card {
    display: grid;
    gap: 24px;
    align-items: center;
    padding: 24px;
    border-radius: 32px;
    background: var(--white);
    border: 1px solid var(--line);
    box-shadow: var(--shadow);
    overflow: hidden;
}

.big-feature-card h2 {
    font-size: clamp(28px, 7vw, 46px);
    line-height: 1.14;
    letter-spacing: -0.04em;
    margin: 12px 0;
}

.feature-copy p {
    color: var(--muted);
    margin: 0 0 14px;
}

.feature-points {
    display: grid;
    gap: 10px;
    margin: 20px 0 6px;
    padding: 0;
    list-style: none;
}

.feature-points li {
    position: relative;
    padding-left: 24px;
    color: #495566;
}

.feature-points li::before {
    content: "";
    position: absolute;
    left: 0;
    top: .75em;
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: var(--primary);
}

.feature-visual {
    min-height: 260px;
    display: grid;
    place-items: center;
    border-radius: 28px;
    background: linear-gradient(145deg, #eef6ff, #ffffff);
    border: 1px solid #e1edfb;
    padding: 18px;
}

.feature-visual img {
    max-height: 360px;
    object-fit: contain;
}

.wallet-feature .feature-visual {
    background: radial-gradient(circle at 70% 20%, rgba(41,128,254,.12), transparent 38%), #f8fbff;
}

.cold-wallet-feature {
    background: linear-gradient(135deg, #ffffff, #f2f8ff);
}

.swap-feature .feature-visual {
    background: linear-gradient(145deg, #f6fbff, #ffffff);
}

.dapp-feature {
    background: linear-gradient(135deg, #f9fbff, #ffffff);
}

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

.step-card {
    position: relative;
    padding-left: 78px;
}

.step-card::before {
    counter-increment: steps;
    content: counter(steps, decimal-leading-zero);
    position: absolute;
    left: 20px;
    top: 22px;
    width: 42px;
    height: 42px;
    border-radius: 15px;
    display: grid;
    place-items: center;
    color: var(--white);
    background: var(--primary);
    font-weight: 900;
}

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

.risk-card strong {
    display: block;
    margin: 10px 0 0;
    color: #2f3948;
}

.app-category-center {
    background: linear-gradient(180deg, #f7fbff, #ffffff);
}

.category-card {
    min-height: 178px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.category-card:nth-child(1),
.category-card:nth-child(5) {
    background: linear-gradient(145deg, #ffffff, #eef6ff);
}

.faq-item {
    box-shadow: none;
}

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

.cta-box {
    text-align: center;
    border-radius: 32px;
    padding: 34px 22px;
    background: radial-gradient(circle at 50% 0%, rgba(41,128,254,.18), transparent 34%), linear-gradient(180deg, #ffffff, #f0f7ff);
    border: 1px solid #dcecff;
    box-shadow: var(--shadow);
}

.cta-box h2 {
    margin: 0 0 12px;
    font-size: clamp(28px, 7vw, 46px);
    letter-spacing: -0.04em;
}

.cta-box p {
    margin: 0 auto 22px;
    max-width: 640px;
    color: var(--muted);
}

.page-hero {
    padding: 56px 0 26px;
    background: radial-gradient(circle at 84% 10%, rgba(41,128,254,.14), transparent 28%), linear-gradient(180deg, #ffffff, #f6fbff);
}

.page-layout {
    display: grid;
    gap: 22px;
    align-items: start;
}

.article-card {
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: 30px;
    padding: 24px;
    box-shadow: var(--shadow);
}

.article-card h2 {
    margin: 26px 0 10px;
    font-size: 24px;
}

.article-card p {
    color: #4b5667;
}

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

.check-list li,
.number-list li {
    padding: 12px 14px;
    border-radius: 16px;
    background: #f7faff;
    border: 1px solid var(--line);
    color: #4a5668;
}

.number-list {
    counter-reset: guide;
}

.number-list li::before {
    counter-increment: guide;
    content: counter(guide) ". ";
    color: var(--primary);
    font-weight: 900;
}

.side-stack {
    display: grid;
    gap: 16px;
}

.download-panel {
    text-align: center;
    margin-top: 22px;
    padding: 22px;
    background: #f7fbff;
    border: 1px solid #dcecff;
    border-radius: 24px;
}

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

.site-footer {
    background: #182233;
    color: #d6deea;
    padding: 42px 0 0;
}

.site-footer p,
.site-footer a {
    color: #aeb9c8;
}

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

.site-footer a {
    display: block;
    margin: 7px 0;
}

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

.footer-brand {
    color: #ffffff;
}

.footer-bottom {
    margin-top: 28px;
    padding: 16px 0 22px;
    border-top: 1px solid rgba(255,255,255,.12);
    color: #93a1b5;
    font-size: 14px;
}

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

    .process-steps {
        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;
        justify-content: flex-end;
        gap: 3px;
        padding: 0;
        border: 0;
        box-shadow: none;
        background: transparent;
        border-radius: 0;
    }

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

    .launch-hero {
        padding: 74px 0 48px;
    }

    .launch-grid,
    .big-feature-card,
    .page-layout {
        grid-template-columns: minmax(0, 1fr) minmax(360px, .9fr);
    }

    .big-feature-card.reverse,
    .cold-wallet-feature {
        grid-template-columns: minmax(360px, .9fr) minmax(0, 1fr);
    }

    .big-feature-card.reverse .feature-copy,
    .cold-wallet-feature .feature-copy {
        order: 2;
    }

    .big-feature-card.reverse .feature-visual,
    .cold-wallet-feature .feature-visual {
        order: 1;
    }

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

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

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

    .faq-grid,
    .footer-grid {
        grid-template-columns: 1.4fr .8fr .8fr;
    }

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

    .article-card {
        padding: 34px;
    }
}

@media (min-width: 1100px) {
    .site-nav a {
        padding: 9px 13px;
    }

    .app-showcase {
        min-height: 560px;
    }

    .feature-visual {
        min-height: 430px;
    }
}