/* Base */
:root {
    --primary: #2980FE;
    --primary-soft: #EAF3FF;
    --primary-tint: #F5F9FF;
    --white: #FFFFFF;
    --gray-50: #F7F9FC;
    --gray-100: #EEF2F7;
    --gray-200: #E3E8F0;
    --gray-500: #6B7280;
    --gray-700: #334155;
    --gray-900: #101828;
    --radius-lg: 24px;
    --radius-xl: 32px;
    --shadow-soft: 0 20px 60px rgba(41, 128, 254, 0.10);
    --shadow-card: 0 16px 40px rgba(16, 24, 40, 0.07);
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang TC", "Noto Sans TC", "Microsoft JhengHei", Arial, sans-serif;
    color: var(--gray-900);
    background: linear-gradient(180deg, #FFFFFF 0%, #F7FAFF 42%, #FFFFFF 100%);
    line-height: 1.75;
    overflow-x: hidden;
}

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

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

main {
    min-height: 70vh;
}

.content-container,
.section-inner {
    width: min(1120px, calc(100% - 32px));
    margin: 0 auto;
}

.content-container {
    padding: 44px 0;
}

.gradient-background {
    background:
        radial-gradient(circle at 12% 10%, rgba(41, 128, 254, 0.14), transparent 28%),
        linear-gradient(180deg, #FFFFFF 0%, #F5F9FF 100%);
}

.eyebrow,
.category-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--primary);
    background: var(--primary-soft);
    border: 1px solid rgba(41, 128, 254, 0.15);
    border-radius: 999px;
    padding: 7px 13px;
    font-size: 13px;
    font-weight: 700;
}

.section-head {
    margin-bottom: 24px;
}

.section-head.center {
    text-align: center;
    max-width: 760px;
    margin: 0 auto 26px;
}

.section-head h2,
.page-section h2 {
    margin: 12px 0 10px;
    font-size: clamp(28px, 5vw, 46px);
    letter-spacing: -0.04em;
    line-height: 1.15;
}

.section-head p,
.lead,
.muted {
    color: var(--gray-500);
}

.lead {
    font-size: 17px;
    max-width: 760px;
}

.small-link,
.card-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--primary);
    font-weight: 800;
    margin-top: 10px;
}

.small-link::after,
.card-link::after {
    content: "→";
}

/* Header / logo / responsive nav / mobile nav / desktop nav */
.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(255, 255, 255, 0.86);
    backdrop-filter: blur(18px);
    border-bottom: 1px solid rgba(227, 232, 240, 0.88);
}

.nav-wrap {
    width: min(1180px, calc(100% - 28px));
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 0;
    gap: 14px;
}

.logo {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-weight: 900;
    letter-spacing: -0.02em;
    color: var(--gray-900);
    white-space: nowrap;
}

.logo img {
    width: 38px;
    height: 38px;
    border-radius: 12px;
    object-fit: cover;
    box-shadow: 0 10px 25px rgba(41, 128, 254, 0.18);
}

.nav-toggle {
    border: 1px solid var(--gray-200);
    background: var(--white);
    color: var(--gray-700);
    border-radius: 999px;
    padding: 8px 14px;
    font-weight: 800;
}

.site-nav {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 68px;
    left: 14px;
    right: 14px;
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: 22px;
    padding: 10px;
    box-shadow: var(--shadow-card);
}

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

.site-nav a {
    padding: 12px 14px;
    border-radius: 14px;
    color: var(--gray-700);
    font-weight: 700;
}

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

/* Unified download button */
.download-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 0 24px;
    border-radius: 999px;
    background: var(--primary);
    color: #FFFFFF;
    font-weight: 900;
    letter-spacing: 0.02em;
    box-shadow: 0 16px 34px rgba(41, 128, 254, 0.26);
    border: 1px solid rgba(41, 128, 254, 0.15);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    cursor: pointer;
}

.download-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 22px 44px rgba(41, 128, 254, 0.30);
}

/* Launch hero / app showcase / hero visual */
.launch-hero {
    position: relative;
    overflow: hidden;
    padding: 54px 0 28px;
}

.launch-hero::before {
    content: "";
    position: absolute;
    inset: -120px -120px auto auto;
    width: 360px;
    height: 360px;
    border-radius: 999px;
    background: rgba(41, 128, 254, 0.12);
    filter: blur(14px);
}

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

.launch-copy h1,
.page-hero h1 {
    margin: 14px 0 18px;
    font-size: clamp(38px, 10vw, 76px);
    line-height: 1.04;
    letter-spacing: -0.06em;
}

.launch-copy p {
    color: var(--gray-500);
    font-size: 18px;
    max-width: 680px;
}

.hero-actions {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 14px;
    margin: 24px 0;
}

.security-tags,
.floating-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.security-tags span,
.floating-tags span,
.mini-pill {
    display: inline-flex;
    align-items: center;
    border-radius: 999px;
    padding: 8px 12px;
    background: rgba(255, 255, 255, 0.76);
    border: 1px solid var(--gray-200);
    color: var(--gray-700);
    font-size: 13px;
    font-weight: 750;
}

.app-showcase {
    position: relative;
    min-height: 440px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 36px;
    background:
        radial-gradient(circle at 30% 20%, rgba(41, 128, 254, 0.18), transparent 32%),
        linear-gradient(145deg, #F6FAFF, #FFFFFF);
    border: 1px solid var(--gray-200);
    box-shadow: var(--shadow-soft);
    overflow: hidden;
}

.hero-visual {
    width: min(76%, 420px);
    filter: drop-shadow(0 28px 40px rgba(16, 24, 40, 0.16));
}

.float-label {
    position: absolute;
    padding: 10px 13px;
    border-radius: 16px;
    background: rgba(255,255,255,0.92);
    border: 1px solid rgba(227, 232, 240, 0.94);
    box-shadow: 0 14px 32px rgba(16,24,40,0.08);
    color: var(--gray-700);
    font-size: 13px;
    font-weight: 800;
}

.float-label.one { top: 28px; left: 20px; }
.float-label.two { right: 22px; top: 92px; }
.float-label.three { left: 22px; bottom: 86px; }
.float-label.four { right: 24px; bottom: 28px; }

/* Highlight bar / launch card */
.highlight-bar {
    display: grid;
    grid-template-columns: 1fr;
    gap: 14px;
    margin-top: 20px;
}

.launch-card,
.highlight-card,
.category-card,
.risk-card,
.faq-item,
.info-card,
.step-card,
.check-card {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    box-shadow: 0 12px 30px rgba(16, 24, 40, 0.05);
}

.highlight-card {
    padding: 18px;
    min-height: 150px;
}

.highlight-card .tag {
    display: inline-flex;
    color: var(--primary);
    font-weight: 900;
    font-size: 13px;
    background: var(--primary-soft);
    border-radius: 999px;
    padding: 4px 10px;
}

.highlight-card h3 {
    margin: 12px 0 6px;
    font-size: 20px;
}

.highlight-card p {
    margin: 0;
    color: var(--gray-500);
    font-size: 15px;
}

/* Big feature card / wallet feature / cold wallet feature / swap feature / dapp feature */
.feature-stack {
    display: grid;
    gap: 26px;
}

.big-feature-card {
    display: grid;
    grid-template-columns: 1fr;
    gap: 26px;
    align-items: center;
    padding: clamp(22px, 4vw, 44px);
    border-radius: 34px;
    border: 1px solid var(--gray-200);
    background: var(--white);
    box-shadow: var(--shadow-card);
    overflow: hidden;
}

.big-feature-card.soft {
    background: linear-gradient(145deg, #FFFFFF, #F4F8FF);
}

.feature-media {
    position: relative;
    display: grid;
    place-items: center;
    min-height: 260px;
    border-radius: 28px;
    background:
        radial-gradient(circle at 50% 30%, rgba(41, 128, 254, 0.16), transparent 35%),
        var(--gray-50);
    border: 1px solid var(--gray-200);
}

.feature-media img {
    max-height: 380px;
    object-fit: contain;
    filter: drop-shadow(0 24px 30px rgba(16,24,40,0.13));
}

.feature-copy h2 {
    margin: 8px 0 12px;
    font-size: clamp(28px, 6vw, 48px);
    line-height: 1.12;
    letter-spacing: -0.04em;
}

.feature-copy p {
    color: var(--gray-500);
}

.feature-points {
    display: grid;
    gap: 9px;
    margin: 18px 0 8px;
    padding: 0;
    list-style: none;
}

.feature-points li {
    position: relative;
    padding-left: 24px;
    color: var(--gray-700);
}

.feature-points li::before {
    content: "";
    position: absolute;
    top: 12px;
    left: 0;
    width: 10px;
    height: 10px;
    border-radius: 999px;
    background: var(--primary);
    box-shadow: 0 0 0 5px var(--primary-soft);
}

.wallet-feature .feature-media {
    background: linear-gradient(160deg, #F6FAFF, #FFFFFF);
}

.cold-wallet-feature .feature-media {
    background: linear-gradient(160deg, #EEF6FF, #FFFFFF);
}

.swap-feature .feature-media {
    background: linear-gradient(160deg, #FFFFFF, #F2F7FF);
}

.dapp-feature .feature-media {
    background: linear-gradient(160deg, #F3F8FF, #FFFFFF);
}

/* Process steps */
.process-steps {
    display: grid;
    grid-template-columns: 1fr;
    gap: 14px;
}

.step-card {
    padding: 20px;
}

.step-number {
    width: 42px;
    height: 42px;
    display: grid;
    place-items: center;
    background: var(--primary);
    color: #fff;
    border-radius: 14px;
    font-weight: 900;
    margin-bottom: 12px;
}

/* Risk grid / safety panel */
.risk-grid,
.category-grid,
.info-grid,
.faq-grid,
.check-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 14px;
}

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

.risk-card strong {
    display: block;
    margin-bottom: 6px;
    font-size: 18px;
}

.risk-card p {
    color: var(--gray-500);
    margin: 6px 0;
}

.safety-panel {
    border-radius: 32px;
    padding: clamp(22px, 5vw, 42px);
    background: linear-gradient(135deg, #F6FAFF, #FFFFFF);
    border: 1px solid var(--gray-200);
    box-shadow: var(--shadow-soft);
}

/* App category center / category grid */
.app-category-center {
    padding: 26px;
    border-radius: 34px;
    background: linear-gradient(180deg, #FFFFFF, #F6FAFF);
    border: 1px solid var(--gray-200);
    box-shadow: var(--shadow-card);
}

.category-card {
    padding: 20px;
    min-height: 164px;
}

.category-card h3 {
    margin: 8px 0;
    font-size: 20px;
}

.category-card p {
    margin: 0;
    color: var(--gray-500);
}

/* FAQ item */
.faq-item {
    padding: 20px;
}

.faq-item h3 {
    margin: 0 0 8px;
    font-size: 19px;
}

.faq-item p {
    margin: 0;
    color: var(--gray-500);
}

/* CTA */
.cta-section {
    text-align: center;
    border-radius: 36px;
    background:
        radial-gradient(circle at 50% 0%, rgba(41, 128, 254, 0.18), transparent 34%),
        linear-gradient(135deg, #FFFFFF, #F3F8FF);
    border: 1px solid var(--gray-200);
    padding: clamp(32px, 7vw, 64px) 20px;
    box-shadow: var(--shadow-soft);
}

.cta-section h2 {
    margin: 0 0 12px;
    font-size: clamp(30px, 7vw, 54px);
    line-height: 1.12;
    letter-spacing: -0.05em;
}

.cta-section p {
    color: var(--gray-500);
    max-width: 660px;
    margin: 0 auto 22px;
}

/* Inner pages */
.page-hero {
    padding: 54px 0 26px;
    background:
        radial-gradient(circle at 90% 10%, rgba(41, 128, 254, 0.12), transparent 28%),
        linear-gradient(180deg, #FFFFFF, #F6FAFF);
    border-bottom: 1px solid var(--gray-200);
}

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

.article-card {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: 30px;
    padding: clamp(22px, 4vw, 38px);
    box-shadow: var(--shadow-card);
}

.article-card h2 {
    margin-top: 0;
    font-size: clamp(24px, 5vw, 36px);
    letter-spacing: -0.03em;
}

.article-card p {
    color: var(--gray-700);
}

.side-panel {
    background: linear-gradient(180deg, #FFFFFF, #F6FAFF);
    border: 1px solid var(--gray-200);
    border-radius: 28px;
    padding: 22px;
    box-shadow: var(--shadow-card);
}

.side-panel h3,
.info-card h3,
.check-card h3 {
    margin-top: 0;
}

.info-card,
.check-card {
    padding: 20px;
}

.number-list,
.clean-list {
    margin: 0;
    padding-left: 20px;
    color: var(--gray-700);
}

.number-list li,
.clean-list li {
    margin: 8px 0;
}

.notice-box {
    border-radius: 24px;
    background: var(--primary-tint);
    border: 1px solid rgba(41, 128, 254, 0.18);
    padding: 18px;
    color: var(--gray-700);
    margin: 20px 0;
}

.cta-inline {
    margin-top: 24px;
    padding-top: 20px;
    border-top: 1px solid var(--gray-200);
}

/* Footer */
.site-footer {
    margin-top: 40px;
    background: #FFFFFF;
    border-top: 1px solid var(--gray-200);
}

.footer-inner {
    width: min(1120px, calc(100% - 32px));
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
    padding: 34px 0;
}

.footer-brand p {
    max-width: 540px;
    color: var(--gray-500);
}

.footer-links {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
}

.footer-links a {
    color: var(--gray-700);
    font-weight: 700;
    background: var(--gray-50);
    border: 1px solid var(--gray-200);
    padding: 10px 12px;
    border-radius: 14px;
}

.footer-bottom {
    border-top: 1px solid var(--gray-200);
    color: var(--gray-500);
    font-size: 14px;
    text-align: center;
    padding: 16px;
}

/* Tablet */
@media (min-width: 640px) {
    .highlight-bar,
    .category-grid,
    .risk-grid,
    .info-grid,
    .check-grid,
    .faq-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

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

/* Desktop */
@media (min-width: 960px) {
    .nav-toggle {
        display: none;
    }

    .site-nav {
        display: flex;
        position: static;
        flex-direction: row;
        align-items: center;
        gap: 2px;
        padding: 6px;
        box-shadow: none;
        border-radius: 999px;
        background: rgba(247, 249, 252, 0.88);
    }

    .site-nav a {
        padding: 9px 13px;
        font-size: 14px;
    }

    .launch-hero {
        padding: 76px 0 42px;
    }

    .launch-grid {
        grid-template-columns: 1.02fr 0.98fr;
        gap: 48px;
    }

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

    .big-feature-card {
        grid-template-columns: 1fr 1fr;
    }

    .big-feature-card.reverse .feature-media {
        order: 2;
    }

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

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

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

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

    .page-layout {
        grid-template-columns: minmax(0, 1fr) 340px;
    }

    .footer-inner {
        grid-template-columns: 1.1fr 0.9fr;
        align-items: start;
    }
}

@media (min-width: 1180px) {
    .content-container {
        padding: 58px 0;
    }

    .app-showcase {
        min-height: 540px;
    }
}

@media (max-width: 380px) {
    .content-container,
    .section-inner,
    .footer-inner,
    .nav-wrap {
        width: min(100% - 22px, 1120px);
    }

    .download-btn {
        width: 100%;
    }

    .float-label {
        font-size: 12px;
        padding: 8px 10px;
    }
}