* {
    box-sizing: border-box;
}

:root {
    --primary: #2980FE;
    --primary-dark: #1264d8;
    --blue-soft: #eef6ff;
    --blue-faint: #f6faff;
    --text: #1f2937;
    --muted: #667085;
    --line: #e5eaf1;
    --panel: #ffffff;
    --soft: #f5f7fb;
    --deep: #2f3a4a;
    --radius: 24px;
    --shadow: 0 18px 45px rgba(31, 41, 55, 0.08);
}

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, #ffffff 0%, #f7fbff 48%, #ffffff 100%);
    line-height: 1.72;
    overflow-x: hidden;
}

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

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

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

h1, h2, h3 {
    color: var(--text);
    letter-spacing: -0.02em;
    margin: 0 0 14px;
    line-height: 1.22;
}

h1 {
    font-size: clamp(34px, 9vw, 66px);
}

h2 {
    font-size: clamp(26px, 5vw, 42px);
}

h3 {
    font-size: 20px;
}

ul, ol {
    margin: 0;
    padding-left: 20px;
    color: var(--muted);
}

li + li {
    margin-top: 8px;
}

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

.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(18px);
    border-bottom: 1px solid var(--line);
}

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

.logo, .footer-logo {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-weight: 800;
    color: var(--deep);
}

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

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

.site-nav {
    display: none;
    position: absolute;
    top: 72px;
    left: 16px;
    right: 16px;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 18px;
    box-shadow: var(--shadow);
    padding: 12px;
}

.site-nav.is-open {
    display: grid;
}

.site-nav a {
    padding: 12px 14px;
    color: var(--deep);
    border-radius: 12px;
    font-size: 15px;
}

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

.section {
    padding: 58px 0;
}

.section-header {
    margin-bottom: 26px;
    max-width: 760px;
}

.section-eyebrow,
.badge,
.category-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--primary);
    background: var(--blue-soft);
    border: 1px solid rgba(41, 128, 254, 0.18);
    border-radius: 999px;
    padding: 7px 12px;
    font-size: 13px;
    font-weight: 700;
    margin-bottom: 14px;
}

.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 12px 24px rgba(41, 128, 254, 0.24);
    transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
    border: none;
}

.download-btn:hover {
    transform: translateY(-2px);
    background: var(--primary-dark);
    box-shadow: 0 18px 32px rgba(41, 128, 254, 0.28);
}

.text-link {
    color: var(--primary);
    font-weight: 800;
    display: inline-flex;
    align-items: center;
    margin-top: 8px;
}

.text-link::after {
    content: "›";
    margin-left: 6px;
}

.web3-hero {
    position: relative;
    overflow: hidden;
    padding: 54px 0 36px;
}

.web3-hero::before {
    content: "";
    position: absolute;
    inset: -160px -120px auto auto;
    width: 420px;
    height: 420px;
    background: radial-gradient(circle, rgba(41, 128, 254, .22), rgba(41, 128, 254, 0));
    pointer-events: none;
}

.hero-grid {
    display: grid;
    gap: 34px;
    align-items: center;
}

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

.hero-copy p {
    max-width: 640px;
    font-size: 17px;
}

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

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

.security-tags span, .tag-row span {
    display: inline-flex;
    align-items: center;
    padding: 8px 12px;
    border-radius: 999px;
    background: #fff;
    color: var(--deep);
    border: 1px solid var(--line);
    font-size: 13px;
    box-shadow: 0 8px 24px rgba(31, 41, 55, .05);
}

.hero-visual {
    position: relative;
    border-radius: 32px;
    background: linear-gradient(145deg, #ffffff 0%, #eef6ff 100%);
    border: 1px solid var(--line);
    padding: 28px;
    box-shadow: var(--shadow);
    overflow: hidden;
}

.hero-visual::after {
    content: "";
    position: absolute;
    width: 220px;
    height: 220px;
    border-radius: 50%;
    background: rgba(41, 128, 254, .12);
    right: -80px;
    bottom: -80px;
}

.hero-visual img {
    width: min(360px, 86%);
    margin: 0 auto;
    position: relative;
    z-index: 2;
}

.floating-card {
    position: relative;
    z-index: 3;
    margin-top: 14px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
}

.floating-card span {
    background: rgba(255,255,255,.88);
    border: 1px solid var(--line);
    color: var(--deep);
    border-radius: 16px;
    padding: 11px 12px;
    font-size: 13px;
    font-weight: 700;
}

.ecosystem-nav, .category-grid, .risk-grid, .faq-grid, .feature-grid {
    display: grid;
    gap: 16px;
}

.ecosystem-card, .category-card, .risk-card, .faq-item, .feature-card, .note-card, .step-card {
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 22px;
    box-shadow: 0 14px 32px rgba(31, 41, 55, 0.05);
}

.ecosystem-card strong, .category-card strong {
    display: block;
    color: var(--primary);
    margin-bottom: 10px;
    font-size: 13px;
}

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

.service-panel,
.web3-section,
.hardware-wallet-section,
.digital-assets-section,
.swap-section,
.privacy-section,
.submit-chain-section,
.developer-center-section,
.app-section,
.cold-wallet-section,
.dapp-section {
    display: grid;
    gap: 28px;
    align-items: center;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 32px;
    padding: 28px;
    box-shadow: var(--shadow);
}

.hardware-wallet-section, .privacy-section {
    background: linear-gradient(145deg, #f8fbff 0%, #ffffff 100%);
}

.service-media {
    background: linear-gradient(145deg, #eef6ff, #fff);
    border: 1px solid var(--line);
    border-radius: 28px;
    padding: 22px;
}

.service-media img {
    width: min(400px, 100%);
    margin: 0 auto;
}

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

.check-list li {
    margin: 0;
    padding: 12px 14px;
    background: var(--blue-faint);
    border: 1px solid var(--line);
    border-radius: 14px;
    color: var(--deep);
}

.safety-panel {
    background: linear-gradient(135deg, #ffffff 0%, #eef6ff 100%);
    border: 1px solid rgba(41,128,254,.18);
    border-radius: 30px;
    padding: 26px;
    box-shadow: var(--shadow);
}

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

.process-steps {
    display: grid;
    gap: 16px;
    counter-reset: step;
}

.step-card {
    position: relative;
    padding-left: 72px;
    min-height: 108px;
}

.step-card .step-num {
    position: absolute;
    left: 22px;
    top: 22px;
    width: 36px;
    height: 36px;
    border-radius: 12px;
    background: var(--primary);
    color: #fff;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
}

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

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

.cta-section {
    text-align: center;
    background: linear-gradient(135deg, #f6faff 0%, #eef6ff 100%);
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
}

.cta-box {
    max-width: 780px;
    margin: 0 auto;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 32px;
    padding: 34px 22px;
    box-shadow: var(--shadow);
}

.page-hero {
    padding: 56px 0 28px;
    background: linear-gradient(180deg, #f6faff 0%, #ffffff 100%);
    border-bottom: 1px solid var(--line);
}

.page-hero p {
    max-width: 760px;
    font-size: 17px;
}

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

.article-card {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 30px;
    padding: 26px;
    box-shadow: var(--shadow);
}

.article-card + .article-card {
    margin-top: 18px;
}

.sidebar {
    display: grid;
    gap: 16px;
}

.code-panel {
    font-family: "SFMono-Regular", Consolas, monospace;
    background: #f7fbff;
    border: 1px solid var(--line);
    border-radius: 22px;
    padding: 18px;
    color: #35516f;
    overflow: auto;
}

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

.site-footer {
    background: #fff;
    border-top: 1px solid var(--line);
    padding: 44px 0 20px;
}

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

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

.site-footer a:not(.footer-logo) {
    display: block;
    color: var(--muted);
    padding: 5px 0;
}

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

.footer-bottom {
    margin-top: 28px;
    padding-top: 18px;
    border-top: 1px solid var(--line);
    font-size: 14px;
}

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

@media (min-width: 900px) {
    .nav-toggle {
        display: none;
    }

    .site-nav {
        display: flex;
        align-items: center;
        position: static;
        padding: 0;
        border: 0;
        box-shadow: none;
        background: transparent;
        gap: 2px;
    }

    .site-nav a {
        padding: 10px 11px;
        font-size: 14px;
    }

    .web3-hero {
        padding: 88px 0 54px;
    }

    .hero-grid {
        grid-template-columns: 1.05fr .95fr;
        gap: 48px;
    }

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

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

    .service-panel,
    .web3-section,
    .hardware-wallet-section,
    .digital-assets-section,
    .swap-section,
    .privacy-section,
    .submit-chain-section,
    .developer-center-section,
    .app-section,
    .cold-wallet-section,
    .dapp-section {
        grid-template-columns: 1fr 1fr;
        padding: 42px;
    }

    .reverse .service-media {
        order: -1;
    }

    .split-panel {
        grid-template-columns: 1fr 1fr;
    }

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

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

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

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

    .page-layout {
        grid-template-columns: minmax(0, 1fr) 330px;
    }

    .footer-grid {
        grid-template-columns: 1.5fr 1fr 1fr 1fr;
    }
}

@media (min-width: 1180px) {
    .site-nav a {
        padding: 10px 14px;
    }
}