* {
    box-sizing: border-box;
}
:root {
    --primary: #2980FE;
    --primary-soft: #EAF3FF;
    --primary-faint: #F5F9FF;
    --white: #FFFFFF;
    --grey-50: #F7F9FC;
    --grey-100: #EDF1F7;
    --grey-200: #DDE5EF;
    --grey-500: #68758A;
    --grey-700: #2F3A4A;
    --grey-900: #111827;
    --radius-lg: 28px;
    --radius-md: 22px;
    --shadow: 0 18px 50px rgba(41, 128, 254, 0.10);
}
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(--grey-700);
    background: linear-gradient(180deg, #F8FBFF 0%, #FFFFFF 38%, #F7F9FC 100%);
    line-height: 1.75;
    overflow-x: hidden;
}
a {
    color: inherit;
    text-decoration: none;
}
img {
    max-width: 100%;
    display: block;
}
.container {
    width: min(1120px, calc(100% - 36px));
    margin: 0 auto;
}
.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(18px);
    border-bottom: 1px solid rgba(221, 229, 239, 0.85);
}
.header-inner {
    width: min(1180px, calc(100% - 28px));
    margin: 0 auto;
    min-height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
}
.logo {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-weight: 800;
    color: var(--grey-900);
    letter-spacing: -0.02em;
}
.logo img {
    width: 38px;
    height: 38px;
    border-radius: 12px;
    object-fit: contain;
}
.logo span {
    white-space: nowrap;
}
.site-nav {
    position: absolute;
    left: 14px;
    right: 14px;
    top: 72px;
    display: none;
    flex-direction: column;
    gap: 6px;
    padding: 14px;
    border: 1px solid var(--grey-200);
    border-radius: 20px;
    background: var(--white);
    box-shadow: var(--shadow);
}
.site-nav.is-open {
    display: flex;
}
.site-nav a {
    color: var(--grey-700);
    font-size: 15px;
    padding: 10px 12px;
    border-radius: 12px;
}
.site-nav a:hover {
    color: var(--primary);
    background: var(--primary-soft);
}
.nav-toggle {
    width: 44px;
    height: 44px;
    border: 1px solid var(--grey-200);
    border-radius: 14px;
    background: var(--white);
    display: grid;
    place-content: center;
    gap: 4px;
}
.nav-toggle span {
    display: block;
    width: 18px;
    height: 2px;
    background: var(--grey-700);
    border-radius: 99px;
}
.web3-hero {
    position: relative;
    padding: 58px 0 40px;
    overflow: hidden;
}
.web3-hero::before,
.gradient-bg::before {
    content: "";
    position: absolute;
    inset: -120px -60px auto auto;
    width: 320px;
    height: 320px;
    background: radial-gradient(circle, rgba(41, 128, 254, 0.20), rgba(41, 128, 254, 0));
    pointer-events: none;
}
.hero-grid {
    position: relative;
    display: grid;
    gap: 30px;
    align-items: center;
}
.eyebrow,
.category-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    width: fit-content;
    padding: 8px 12px;
    border: 1px solid rgba(41, 128, 254, 0.18);
    border-radius: 999px;
    background: var(--primary-soft);
    color: var(--primary);
    font-size: 14px;
    font-weight: 700;
}
h1, h2, h3 {
    color: var(--grey-900);
    line-height: 1.2;
    margin: 0;
}
h1 {
    font-size: clamp(34px, 9vw, 64px);
    letter-spacing: -0.05em;
    margin-top: 18px;
}
h2 {
    font-size: clamp(26px, 6vw, 42px);
    letter-spacing: -0.035em;
}
h3 {
    font-size: 20px;
    letter-spacing: -0.02em;
}
p {
    margin: 0;
}
.lead {
    margin-top: 18px;
    font-size: 17px;
    color: var(--grey-500);
    max-width: 720px;
}
.download-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 50px;
    padding: 0 22px;
    border-radius: 999px;
    border: 1px solid var(--primary);
    background: var(--primary);
    color: var(--white);
    font-size: 16px;
    font-weight: 800;
    box-shadow: 0 14px 28px rgba(41, 128, 254, 0.22);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.download-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 18px 34px rgba(41, 128, 254, 0.28);
}
.hero-actions {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-top: 26px;
    flex-wrap: wrap;
}
.security-tags,
.tag-list {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-top: 22px;
}
.security-tags span,
.tag-list span {
    padding: 8px 12px;
    border-radius: 999px;
    background: var(--white);
    border: 1px solid var(--grey-200);
    color: var(--grey-700);
    font-size: 14px;
}
.hero-visual {
    position: relative;
    min-height: 370px;
    display: grid;
    place-items: center;
    border-radius: 32px;
    background: linear-gradient(145deg, var(--white), #EDF6FF);
    border: 1px solid rgba(41, 128, 254, 0.12);
    box-shadow: var(--shadow);
    overflow: hidden;
}
.hero-visual::before {
    content: "";
    position: absolute;
    width: 260px;
    height: 260px;
    border: 1px solid rgba(41, 128, 254, 0.14);
    border-radius: 50%;
}
.hero-visual img {
    position: relative;
    z-index: 2;
    max-height: 340px;
    object-fit: contain;
    filter: drop-shadow(0 24px 36px rgba(41, 128, 254, 0.18));
}
.float-tag {
    position: absolute;
    z-index: 3;
    padding: 9px 12px;
    border-radius: 14px;
    background: rgba(255, 255, 255, 0.88);
    border: 1px solid rgba(221, 229, 239, 0.92);
    color: var(--grey-700);
    font-weight: 700;
    font-size: 13px;
    box-shadow: 0 12px 26px rgba(31, 51, 79, 0.08);
}
.float-tag:nth-of-type(1) { top: 28px; left: 20px; }
.float-tag:nth-of-type(2) { top: 88px; right: 18px; }
.float-tag:nth-of-type(3) { bottom: 78px; left: 18px; }
.float-tag:nth-of-type(4) { bottom: 26px; right: 28px; }
.section {
    padding: 54px 0;
}
.section-head {
    display: grid;
    gap: 12px;
    margin-bottom: 26px;
}
.section-head p {
    color: var(--grey-500);
    max-width: 780px;
}
.ecosystem-nav {
    padding: 24px 0 46px;
}
.ecosystem-grid,
.category-grid,
.risk-grid,
.faq-grid {
    display: grid;
    gap: 16px;
}
.ecosystem-card,
.info-card,
.risk-card,
.faq-item,
.step-card,
.notice-card,
.side-card {
    background: var(--white);
    border: 1px solid var(--grey-200);
    border-radius: var(--radius-md);
    padding: 20px;
    box-shadow: 0 12px 34px rgba(31, 51, 79, 0.04);
}
.ecosystem-card {
    min-height: 180px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.ecosystem-card .mini-label,
.mini-label {
    width: fit-content;
    padding: 5px 10px;
    border-radius: 999px;
    background: var(--primary-soft);
    color: var(--primary);
    font-size: 13px;
    font-weight: 800;
}
.link-arrow {
    margin-top: auto;
    color: var(--primary);
    font-weight: 800;
}
.feature-panel {
    display: grid;
    gap: 22px;
    align-items: center;
    padding: 24px;
    border: 1px solid rgba(41, 128, 254, 0.12);
    border-radius: 32px;
    background: var(--white);
    box-shadow: var(--shadow);
}
.feature-panel.reversed {
    background: linear-gradient(145deg, #F7FAFF, var(--white));
}
.feature-copy {
    display: grid;
    gap: 16px;
}
.feature-copy p,
.info-card p,
.notice-card p,
.side-card p,
.step-card p,
.risk-card p,
.faq-item p {
    color: var(--grey-500);
}
.feature-copy ul,
.check-list,
.clean-list {
    padding: 0;
    margin: 0;
    list-style: none;
    display: grid;
    gap: 10px;
}
.feature-copy li,
.check-list li,
.clean-list li {
    position: relative;
    padding-left: 22px;
    color: var(--grey-700);
}
.feature-copy li::before,
.check-list li::before,
.clean-list li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0.72em;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--primary);
}
.feature-image {
    display: grid;
    place-items: center;
    min-height: 260px;
    border-radius: 26px;
    background: linear-gradient(145deg, var(--primary-soft), var(--grey-50));
    border: 1px solid var(--grey-200);
    overflow: hidden;
}
.feature-image img {
    max-height: 300px;
    object-fit: contain;
}
.web3-section .feature-image,
.digital-assets-section .feature-image {
    background: linear-gradient(145deg, #FFFFFF, #EAF3FF);
}
.hardware-wallet-section,
.privacy-section {
    background: linear-gradient(180deg, rgba(234, 243, 255, 0.72), rgba(255, 255, 255, 0));
}
.swap-section .feature-image {
    background: linear-gradient(145deg, #F9FBFF, #EAF3FF);
}
.privacy-layout,
.submit-layout,
.developer-layout,
.page-layout {
    display: grid;
    gap: 18px;
}
.safety-panel {
    border-radius: 30px;
    border: 1px solid rgba(41, 128, 254, 0.15);
    background: linear-gradient(135deg, #FFFFFF, #EEF6FF);
    padding: 24px;
    display: grid;
    gap: 16px;
}
.process-steps {
    display: grid;
    gap: 14px;
}
.step-card {
    position: relative;
}
.step-no {
    width: 42px;
    height: 42px;
    border-radius: 15px;
    display: grid;
    place-items: center;
    background: var(--primary);
    color: var(--white);
    font-weight: 900;
    margin-bottom: 12px;
}
.risk-card {
    border-left: 4px solid var(--primary);
    display: grid;
    gap: 9px;
}
.risk-card strong {
    color: var(--grey-900);
}
.faq-item {
    display: grid;
    gap: 8px;
}
.faq-item h3 {
    font-size: 18px;
}
.cta-section {
    padding: 58px 0 74px;
}
.cta-box {
    text-align: center;
    display: grid;
    justify-items: center;
    gap: 18px;
    padding: 34px 20px;
    border-radius: 32px;
    background: linear-gradient(135deg, #FFFFFF, #EAF3FF);
    border: 1px solid rgba(41, 128, 254, 0.16);
    box-shadow: var(--shadow);
}
.cta-box p {
    color: var(--grey-500);
    max-width: 700px;
}
.page-hero {
    padding: 54px 0 26px;
    position: relative;
}
.page-hero .lead {
    max-width: 820px;
}
.article-card {
    background: var(--white);
    border: 1px solid var(--grey-200);
    border-radius: 30px;
    padding: 24px;
    display: grid;
    gap: 18px;
    box-shadow: 0 12px 34px rgba(31, 51, 79, 0.04);
}
.article-card p {
    color: var(--grey-500);
}
.article-section {
    padding: 26px 0 64px;
}
.two-column {
    display: grid;
    gap: 16px;
}
.side-card {
    align-self: start;
    display: grid;
    gap: 14px;
    background: linear-gradient(180deg, #FFFFFF, #F5F9FF);
}
.download-row {
    margin-top: 8px;
}
.code-panel {
    background: #F8FAFE;
    border: 1px solid var(--grey-200);
    border-radius: 24px;
    padding: 18px;
    color: var(--grey-700);
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 14px;
    overflow-x: auto;
}
.code-panel span {
    color: var(--primary);
}
.site-footer {
    padding: 46px 0 24px;
    background: #F6F8FC;
    border-top: 1px solid var(--grey-200);
}
.footer-grid {
    display: grid;
    gap: 22px;
}
.footer-brand {
    font-weight: 900;
    color: var(--grey-900);
    font-size: 22px;
    margin-bottom: 8px;
}
.site-footer p {
    color: var(--grey-500);
}
.site-footer h3 {
    font-size: 16px;
    margin-bottom: 10px;
}
.site-footer a {
    display: block;
    color: var(--grey-500);
    padding: 4px 0;
}
.site-footer a:hover {
    color: var(--primary);
}
.footer-bottom {
    margin-top: 28px;
    padding-top: 18px;
    border-top: 1px solid var(--grey-200);
    color: var(--grey-500);
    display: flex;
    gap: 10px;
    flex-direction: column;
    font-size: 14px;
}
@media (min-width: 680px) {
    .ecosystem-grid,
    .category-grid,
    .risk-grid,
    .faq-grid,
    .process-steps,
    .two-column {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
    .footer-grid {
        grid-template-columns: 1.4fr repeat(3, 1fr);
    }
    .footer-bottom {
        flex-direction: row;
        justify-content: space-between;
    }
}
@media (min-width: 980px) {
    .nav-toggle {
        display: none;
    }
    .site-nav {
        position: static;
        display: flex;
        flex-direction: row;
        align-items: center;
        width: auto;
        padding: 0;
        border: 0;
        box-shadow: none;
        background: transparent;
        gap: 4px;
    }
    .site-nav a {
        font-size: 14px;
        padding: 8px 9px;
    }
    .web3-hero {
        padding: 88px 0 54px;
    }
    .hero-grid,
    .feature-panel,
    .privacy-layout,
    .submit-layout,
    .developer-layout,
    .page-layout {
        grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    }
    .feature-panel.reversed .feature-copy {
        order: 2;
    }
    .feature-panel.reversed .feature-image {
        order: 1;
    }
    .ecosystem-grid {
        grid-template-columns: repeat(7, minmax(0, 1fr));
    }
    .ecosystem-card {
        min-height: 220px;
        padding: 18px;
    }
    .category-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
    .risk-grid {
        grid-template-columns: repeat(4, minmax(0, 1fr));
    }
    .process-steps {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
    .article-card,
    .safety-panel {
        padding: 34px;
    }
    .section {
        padding: 72px 0;
    }
}
@media (min-width: 1180px) {
    .site-nav a {
        padding: 8px 11px;
    }
    .hero-visual {
        min-height: 520px;
    }
    .hero-visual img {
        max-height: 450px;
    }
}