:root {
    --primary: #2980FE;
    --primary-dark: #1266d8;
    --text: #1f2937;
    --muted: #667085;
    --light: #f5f7fb;
    --lighter: #f8fbff;
    --line: #e5eaf3;
    --white: #ffffff;
    --deep: #111827;
    --shadow: 0 18px 45px rgba(41, 128, 254, 0.08);
    --radius: 24px;
}

* {
    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, #f8fbff 0%, #ffffff 28%, #f6f8fc 100%);
    line-height: 1.7;
    overflow-x: hidden;
}

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

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

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

.site-header {
    position: sticky;
    top: 0;
    z-index: 30;
    background: rgba(255, 255, 255, 0.92);
    border-bottom: 1px solid var(--line);
    backdrop-filter: blur(16px);
}

.header-inner {
    min-height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

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

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

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

.nav-toggle span {
    width: 18px;
    height: 2px;
    background: var(--deep);
    border-radius: 99px;
}

.site-nav {
    position: absolute;
    left: 16px;
    right: 16px;
    top: 72px;
    display: none;
    flex-direction: column;
    gap: 4px;
    padding: 14px;
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: 20px;
    box-shadow: var(--shadow);
}

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

.site-nav a {
    padding: 11px 12px;
    border-radius: 12px;
    color: var(--muted);
    font-size: 14px;
}

.site-nav a.active,
.site-nav a:hover {
    color: var(--primary);
    background: rgba(41, 128, 254, 0.08);
}

.main-wrap,
.page-main {
    padding: 36px 0 72px;
}

.gradient-bg {
    background: radial-gradient(circle at 10% 10%, rgba(41, 128, 254, 0.14), transparent 32%), linear-gradient(135deg, #ffffff 0%, #f4f8ff 100%);
}

.web3-dashboard-hero {
    position: relative;
    display: grid;
    gap: 28px;
    padding: 38px 0 22px;
}

.hero-copy,
.hero-console,
.panel-card,
.service-card,
.feature-block,
.safety-panel,
.article-card,
.faq-item,
.risk-card,
.step-card,
.info-card {
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.hero-copy {
    padding: 28px;
}

.eyebrow,
.category-badge {
    display: inline-flex;
    align-items: center;
    width: fit-content;
    gap: 8px;
    padding: 6px 12px;
    border-radius: 999px;
    background: rgba(41, 128, 254, 0.1);
    color: var(--primary);
    font-size: 13px;
    font-weight: 700;
}

h1, h2, h3 {
    color: var(--deep);
    line-height: 1.25;
    margin: 0;
}

h1 {
    margin-top: 16px;
    font-size: clamp(34px, 9vw, 64px);
    letter-spacing: -0.04em;
}

h2 {
    font-size: clamp(26px, 5vw, 40px);
    letter-spacing: -0.03em;
}

h3 {
    font-size: 20px;
}

p {
    margin: 12px 0 0;
    color: var(--muted);
}

.hero-copy .lead,
.section-lead,
.page-summary {
    font-size: 17px;
    color: #475467;
}

.download-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 12px 24px;
    margin-top: 22px;
    border-radius: 999px;
    background: var(--primary);
    color: var(--white);
    font-weight: 800;
    box-shadow: 0 14px 28px rgba(41, 128, 254, 0.22);
    transition: transform .2s ease, background .2s ease, box-shadow .2s ease;
}

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

.security-tags,
.tag-row {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 22px;
}

.security-tags span,
.tag-row span {
    padding: 8px 12px;
    border-radius: 999px;
    background: var(--lighter);
    border: 1px solid var(--line);
    color: #344054;
    font-size: 13px;
    font-weight: 700;
}

.hero-console {
    padding: 18px;
    overflow: hidden;
}

.product-frame {
    position: relative;
    display: grid;
    place-items: center;
    min-height: 300px;
    border-radius: 22px;
    background: linear-gradient(145deg, #eef6ff 0%, #ffffff 70%);
    border: 1px solid var(--line);
}

.product-frame img {
    max-height: 320px;
    object-fit: contain;
    margin: auto;
}

.status-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
    margin-top: 14px;
}

.status-card {
    padding: 14px;
    border: 1px solid var(--line);
    border-radius: 18px;
    background: #fff;
}

.status-card strong {
    display: block;
    color: var(--deep);
    font-size: 15px;
}

.status-card span {
    display: block;
    margin-top: 4px;
    color: var(--muted);
    font-size: 12px;
}

.section {
    padding: 42px 0;
}

.section-head {
    margin-bottom: 22px;
    max-width: 780px;
}

.service-index,
.category-grid {
    display: grid;
    gap: 14px;
}

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

.service-card .label,
.module-link,
.text-link {
    color: var(--primary);
    font-weight: 800;
    font-size: 14px;
}

.service-card h3 {
    margin-top: 14px;
}

.service-card p {
    min-height: 58px;
}

.module-link,
.text-link {
    display: inline-flex;
    margin-top: 14px;
}

.feature-block {
    padding: 24px;
    display: grid;
    gap: 22px;
}

.digital-assets-hub,
.web3-ecosystem-section,
.hardware-wallet-section,
.swap-service-section,
.privacy-boundary-section,
.submit-chain-section,
.developer-center-section {
    overflow: hidden;
}

.feature-media {
    min-height: 240px;
    border-radius: 22px;
    display: grid;
    place-items: center;
    padding: 20px;
    background: linear-gradient(145deg, #f1f7ff, #ffffff);
    border: 1px solid var(--line);
}

.feature-media img {
    max-height: 260px;
    object-fit: contain;
}

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

.feature-list li,
.check-list li,
.clean-list li {
    position: relative;
    padding-left: 28px;
    color: #475467;
}

.feature-list li::before,
.check-list li::before,
.clean-list li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 9px;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--primary);
    box-shadow: 0 0 0 5px rgba(41, 128, 254, 0.1);
}

.soft-section {
    background: #f6f9fe;
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
}

.safety-panel {
    padding: 24px;
    display: grid;
    gap: 18px;
}

.boundary-grid,
.submit-grid,
.dev-grid,
.risk-grid,
.faq-grid,
.article-grid,
.download-steps {
    display: grid;
    gap: 16px;
}

.boundary-grid .info-card,
.submit-grid .info-card,
.dev-grid .info-card {
    box-shadow: none;
}

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

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

.step-card::before {
    counter-increment: steps;
    content: counter(steps, decimal-leading-zero);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    border-radius: 14px;
    background: rgba(41, 128, 254, 0.1);
    color: var(--primary);
    font-weight: 900;
    margin-bottom: 12px;
}

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

.risk-card .risk-tag {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 999px;
    background: #eef6ff;
    color: var(--primary);
    font-size: 12px;
    font-weight: 800;
}

.faq-item {
    padding: 20px;
}

.faq-item h3,
.faq-item summary {
    font-weight: 800;
    color: var(--deep);
    cursor: pointer;
}

.faq-item summary::-webkit-details-marker {
    color: var(--primary);
}

.cta-section {
    text-align: center;
    padding: 42px 22px;
    border-radius: 30px;
    background: linear-gradient(135deg, #eef6ff 0%, #ffffff 62%, #f6f8fc 100%);
    border: 1px solid var(--line);
}

.page-hero {
    padding: 38px 0 28px;
}

.slim-hero .page-summary {
    max-width: 760px;
}

.content-container {
    width: min(100% - 32px, 980px);
    margin: 0 auto;
}

.article-layout {
    display: grid;
    gap: 18px;
}

.article-card {
    padding: 24px;
}

.article-card + .article-card {
    margin-top: 16px;
}

.aside-panel {
    padding: 22px;
    border-radius: var(--radius);
    background: #f8fbff;
    border: 1px solid var(--line);
    height: fit-content;
}

.code-panel {
    border-radius: 22px;
    background: #f8fbff;
    border: 1px solid var(--line);
    padding: 18px;
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
    color: #344054;
    overflow-x: auto;
}

.code-panel span {
    color: var(--primary);
}

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

.site-footer {
    background: #ffffff;
    border-top: 1px solid var(--line);
    padding: 42px 0 24px;
}

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

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

.site-footer h3 {
    font-size: 16px;
    margin-bottom: 8px;
}

.site-footer a {
    display: block;
    color: var(--muted);
    margin-top: 8px;
    font-size: 14px;
}

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

.footer-bottom {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-top: 28px;
    padding-top: 18px;
    border-top: 1px solid var(--line);
    color: var(--muted);
    font-size: 13px;
}

@media (min-width: 640px) {
    .service-index,
    .category-grid,
    .risk-grid,
    .faq-grid,
    .download-steps {
        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;
        flex-direction: row;
        align-items: center;
        gap: 2px;
        padding: 0;
        border: 0;
        box-shadow: none;
        background: transparent;
    }

    .site-nav a {
        padding: 8px 10px;
        white-space: nowrap;
    }

    .web3-dashboard-hero {
        grid-template-columns: 1.05fr .95fr;
        align-items: center;
        padding: 58px 0 34px;
    }

    .hero-copy {
        padding: 40px;
    }

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

    .service-index .service-card:nth-child(1),
    .service-index .service-card:nth-child(7) {
        grid-column: span 2;
    }

    .feature-block {
        grid-template-columns: 1fr 1fr;
        align-items: center;
        padding: 34px;
    }

    .feature-block.reverse .feature-media {
        order: -1;
    }

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

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

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

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

    .article-layout {
        grid-template-columns: minmax(0, 1fr) 300px;
        align-items: start;
    }

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

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

@media (min-width: 1120px) {
    .site-nav a {
        padding: 8px 12px;
        font-size: 14px;
    }
}