* {
    box-sizing: border-box;
}

:root {
    --primary: #2980FE;
    --primary-dark: #1269e7;
    --text: #1e2a3a;
    --muted: #667085;
    --line: #e6ebf2;
    --soft: #f7faff;
    --soft-blue: #eef6ff;
    --white: #ffffff;
    --dark: #202a36;
    --shadow: 0 18px 45px rgba(31, 55, 91, 0.08);
    --radius-lg: 30px;
    --radius-md: 22px;
    --radius-sm: 16px;
}

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%, #f7faff 55%, #ffffff 100%);
    line-height: 1.75;
    overflow-x: hidden;
}

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

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

.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.94);
    backdrop-filter: blur(18px);
    border-bottom: 1px solid var(--line);
}

.nav-shell {
    width: min(1160px, calc(100% - 32px));
    margin: 0 auto;
    min-height: 68px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
}

.brand,
.footer-brand {
    display: inline-flex;
    align-items: center;
    gap: 12px;
}

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

.brand-text {
    font-weight: 800;
    letter-spacing: -0.02em;
    color: var(--dark);
}

.nav-toggle {
    display: none;
}

.nav-toggle-label {
    width: 44px;
    height: 44px;
    border: 1px solid var(--line);
    border-radius: 14px;
    display: grid;
    place-content: center;
    gap: 5px;
    background: var(--white);
}

.nav-toggle-label span {
    width: 20px;
    height: 2px;
    background: var(--dark);
    border-radius: 999px;
    display: block;
}

.site-nav {
    position: absolute;
    left: 16px;
    right: 16px;
    top: 76px;
    display: none;
    flex-direction: column;
    gap: 8px;
    padding: 14px;
    border: 1px solid var(--line);
    border-radius: 22px;
    background: var(--white);
    box-shadow: var(--shadow);
}

.nav-toggle:checked ~ .site-nav {
    display: flex;
}

.nav-link {
    padding: 10px 12px;
    border-radius: 14px;
    color: var(--muted);
    font-size: 0.96rem;
    transition: 0.2s ease;
}

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

.page-main,
main {
    width: 100%;
}

.container,
.section-shell,
.page-shell {
    width: min(1160px, calc(100% - 32px));
    margin: 0 auto;
}

.section {
    padding: 48px 0;
}

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

.eyebrow,
.category-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    width: fit-content;
    padding: 6px 12px;
    border: 1px solid rgba(41, 128, 254, 0.2);
    border-radius: 999px;
    background: var(--soft-blue);
    color: var(--primary);
    font-size: 0.86rem;
    font-weight: 800;
}

h1,
h2,
h3 {
    line-height: 1.2;
    color: var(--dark);
    margin: 0 0 14px;
}

h1 {
    font-size: clamp(2.2rem, 8vw, 4.9rem);
    letter-spacing: -0.055em;
}

h2 {
    font-size: clamp(1.7rem, 5vw, 3rem);
    letter-spacing: -0.04em;
}

h3 {
    font-size: 1.16rem;
}

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

.lead {
    font-size: 1.07rem;
    color: #465568;
}

.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 28px rgba(41, 128, 254, 0.24);
    transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.download-btn:hover {
    transform: translateY(-2px);
    background: var(--primary-dark);
    box-shadow: 0 18px 34px rgba(41, 128, 254, 0.3);
}

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

.inline-link::after {
    content: "→";
}

.web3-dashboard-hero {
    position: relative;
    padding: 48px 0 44px;
    overflow: hidden;
}

.web3-dashboard-hero::before {
    content: "";
    position: absolute;
    inset: -90px -120px auto auto;
    width: 360px;
    height: 360px;
    background: radial-gradient(circle, rgba(41, 128, 254, 0.22), rgba(41, 128, 254, 0));
    pointer-events: none;
}

.hero-grid {
    width: min(1160px, calc(100% - 32px));
    margin: 0 auto;
    display: grid;
    gap: 28px;
    align-items: center;
}

.hero-copy {
    position: relative;
    z-index: 2;
}

.hero-tags,
.mini-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin: 22px 0 0;
}

.hero-tags span,
.mini-tags span {
    padding: 8px 12px;
    border-radius: 999px;
    background: var(--white);
    border: 1px solid var(--line);
    color: #506176;
    font-size: 0.9rem;
    font-weight: 700;
}

.hero-panel {
    position: relative;
    padding: 18px;
    background: linear-gradient(135deg, #ffffff 0%, #edf6ff 100%);
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    overflow: hidden;
}

.hero-phone {
    width: min(320px, 86%);
    margin: 0 auto;
    filter: drop-shadow(0 24px 34px rgba(31, 55, 91, 0.14));
}

.status-stack {
    display: grid;
    gap: 10px;
    margin-top: 18px;
}

.status-card,
.service-card,
.info-card,
.risk-card,
.faq-item,
.related-card,
.step-card,
.check-card,
.code-card {
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: var(--radius-md);
    box-shadow: 0 10px 30px rgba(31, 55, 91, 0.05);
}

.status-card {
    padding: 13px 14px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    font-weight: 800;
}

.status-card span:last-child {
    color: var(--primary);
    font-size: 0.88rem;
}

.service-index {
    padding: 48px 0;
}

.service-grid,
.category-grid,
.risk-grid,
.related-grid,
.faq-grid {
    display: grid;
    gap: 16px;
}

.service-card {
    padding: 22px;
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: attr(data-index);
    position: absolute;
    right: 18px;
    top: 14px;
    color: rgba(41, 128, 254, 0.14);
    font-size: 2.3rem;
    font-weight: 900;
}

.service-card small,
.index-chip {
    display: inline-flex;
    padding: 4px 9px;
    border-radius: 999px;
    background: var(--soft-blue);
    color: var(--primary);
    font-weight: 800;
    margin-bottom: 12px;
}

.split-section,
.digital-assets-hub,
.web3-ecosystem-section,
.hardware-wallet-section,
.swap-service-section,
.privacy-boundary-section,
.submit-chain-section,
.developer-center-section {
    padding: 50px 0;
}

.split-card,
.large-module {
    display: grid;
    gap: 24px;
    align-items: center;
    padding: 24px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--line);
    background: var(--white);
    box-shadow: var(--shadow);
}

.large-module.blue-soft {
    background: linear-gradient(135deg, #ffffff 0%, #eef6ff 100%);
}

.module-image {
    padding: 18px;
    border-radius: 26px;
    background: var(--soft);
    border: 1px solid var(--line);
}

.module-image img {
    margin: 0 auto;
    max-height: 330px;
    object-fit: contain;
}

.feature-list,
.clean-list,
.check-list,
.step-list {
    list-style: none;
    padding: 0;
    margin: 18px 0;
    display: grid;
    gap: 11px;
}

.feature-list li,
.clean-list li,
.check-list li,
.step-list li {
    position: relative;
    padding-left: 28px;
    color: #536275;
}

.feature-list li::before,
.clean-list li::before,
.check-list li::before,
.step-list li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0.66em;
    width: 10px;
    height: 10px;
    border-radius: 999px;
    background: var(--primary);
    box-shadow: 0 0 0 5px rgba(41, 128, 254, 0.12);
}

.privacy-panel {
    display: grid;
    gap: 16px;
}

.safety-panel {
    padding: 22px;
    border-radius: var(--radius-lg);
    border: 1px solid rgba(41, 128, 254, 0.18);
    background: linear-gradient(135deg, #f8fbff, #ffffff);
}

.boundary-grid {
    display: grid;
    gap: 12px;
    margin-top: 16px;
}

.boundary-grid div {
    padding: 16px;
    border: 1px solid var(--line);
    border-radius: 18px;
    background: var(--white);
}

.ecosystem-card {
    padding: 22px;
    border-radius: var(--radius-lg);
    background: var(--soft-blue);
    border: 1px solid rgba(41, 128, 254, 0.18);
}

.code-panel {
    padding: 20px;
    background: #f8fbff;
    border: 1px solid var(--line);
    border-radius: 24px;
    font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
    color: #405168;
    overflow: hidden;
}

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

.process-steps {
    padding: 50px 0;
}

.steps-grid {
    display: grid;
    gap: 16px;
}

.step-card {
    padding: 20px;
}

.step-number {
    width: 36px;
    height: 36px;
    border-radius: 12px;
    display: grid;
    place-items: center;
    background: var(--primary);
    color: #fff;
    font-weight: 900;
    margin-bottom: 12px;
}

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

.risk-card strong {
    color: var(--dark);
    display: block;
    margin-bottom: 6px;
}

.faq-item {
    padding: 20px;
}

.faq-item summary {
    cursor: pointer;
    font-weight: 900;
    color: var(--dark);
}

.faq-item p {
    margin-top: 10px;
}

.cta-section {
    padding: 54px 0 72px;
}

.cta-card {
    text-align: center;
    padding: 34px 22px;
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, #eef6ff 0%, #ffffff 100%);
    border: 1px solid rgba(41, 128, 254, 0.2);
    box-shadow: var(--shadow);
}

.page-hero {
    padding: 48px 0 28px;
}

.page-hero-card {
    padding: 28px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--line);
    background: linear-gradient(135deg, #ffffff 0%, #f2f7ff 100%);
    box-shadow: var(--shadow);
}

.content-layout {
    display: grid;
    gap: 22px;
    width: min(1080px, calc(100% - 32px));
    margin: 0 auto 64px;
}

.article-content {
    padding: 24px;
    border-radius: var(--radius-lg);
    background: var(--white);
    border: 1px solid var(--line);
}

.article-content h2 {
    font-size: clamp(1.35rem, 4vw, 2rem);
    margin-top: 26px;
}

.article-download {
    margin-top: 26px;
    padding-top: 20px;
    border-top: 1px solid var(--line);
}

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

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

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

.download-step {
    position: relative;
    padding: 18px 18px 18px 62px;
    border-radius: 20px;
    border: 1px solid var(--line);
    background: var(--white);
}

.download-step::before {
    counter-increment: step;
    content: counter(step);
    position: absolute;
    left: 18px;
    top: 18px;
    width: 30px;
    height: 30px;
    border-radius: 11px;
    background: var(--primary);
    color: #fff;
    display: grid;
    place-items: center;
    font-weight: 900;
}

.site-footer {
    background: #f5f8fc;
    border-top: 1px solid var(--line);
    padding-top: 34px;
}

.footer-shell {
    width: min(1160px, calc(100% - 32px));
    margin: 0 auto;
    display: grid;
    gap: 24px;
}

.footer-brand {
    align-items: flex-start;
}

.footer-brand strong {
    display: block;
    font-size: 1.1rem;
    color: var(--dark);
}

.footer-links {
    display: grid;
    gap: 20px;
}

.footer-links h3 {
    font-size: 1rem;
    margin-bottom: 10px;
}

.footer-links a {
    display: block;
    color: var(--muted);
    margin: 7px 0;
}

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

.footer-bottom {
    width: min(1160px, calc(100% - 32px));
    margin: 24px auto 0;
    padding: 18px 0;
    border-top: 1px solid var(--line);
    color: var(--muted);
    font-size: 0.92rem;
}

@media (min-width: 680px) {
    .service-grid,
    .category-grid,
    .risk-grid,
    .faq-grid,
    .related-grid,
    .steps-grid,
    .boundary-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

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

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

@media (min-width: 960px) {
    .nav-toggle-label {
        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;
    }

    .nav-link {
        font-size: 0.92rem;
        padding: 8px 10px;
    }

    .web3-dashboard-hero {
        padding: 72px 0 58px;
    }

    .hero-grid {
        grid-template-columns: 0.96fr 1.04fr;
        gap: 48px;
    }

    .hero-panel {
        padding: 26px;
    }

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

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

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

    .large-module,
    .split-card {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        padding: 36px;
    }

    .reverse .module-image,
    .reverse .ecosystem-card,
    .reverse .code-panel {
        order: -1;
    }

    .privacy-panel,
    .submit-chain-section .large-module,
    .developer-center-section .large-module {
        grid-template-columns: 0.9fr 1.1fr;
    }

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

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

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

    .article-content,
    .page-hero-card {
        padding: 34px;
    }

    .footer-shell {
        grid-template-columns: 0.85fr 1.15fr;
        align-items: start;
    }
}

@media (min-width: 1180px) {
    .nav-link {
        padding: 8px 12px;
    }
}