* {
    box-sizing: border-box;
}

:root {
    --primary: #2980FE;
    --primary-dark: #0F5ED8;
    --primary-soft: #EAF3FF;
    --bg: #F7FAFF;
    --bg-soft: #F2F6FB;
    --surface: #FFFFFF;
    --line: #E4EAF2;
    --text: #1E293B;
    --muted: #64748B;
    --deep: #0F172A;
    --radius-xl: 32px;
    --radius-lg: 24px;
    --radius-md: 18px;
    --shadow: 0 20px 60px rgba(41, 128, 254, 0.10);
    --shadow-soft: 0 12px 32px rgba(15, 23, 42, 0.06);
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang TC", "Microsoft JhengHei", "Noto Sans TC", Arial, sans-serif;
    color: var(--text);
    background: linear-gradient(180deg, #FFFFFF 0%, #F7FAFF 44%, #FFFFFF 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: 50;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(18px);
    border-bottom: 1px solid rgba(226, 232, 240, 0.78);
}

.header-inner {
    min-height: 70px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.logo {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-size: 20px;
    font-weight: 800;
    color: var(--deep);
    letter-spacing: -0.02em;
}

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

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

.nav-toggle span {
    width: 18px;
    height: 2px;
    background: var(--deep);
    border-radius: 999px;
}

.site-nav {
    position: absolute;
    left: 16px;
    right: 16px;
    top: 76px;
    display: none;
    padding: 12px;
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: 22px;
    box-shadow: var(--shadow-soft);
}

.site-nav.open {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
}

.site-nav a {
    padding: 10px 12px;
    color: var(--muted);
    border-radius: 14px;
    font-size: 14px;
    font-weight: 650;
}

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

.section {
    padding: 64px 0;
}

.section-tight {
    padding: 44px 0;
}

.kicker,
.category-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 7px 13px;
    border-radius: 999px;
    background: var(--primary-soft);
    color: var(--primary);
    font-size: 13px;
    font-weight: 800;
    letter-spacing: 0.02em;
}

.kicker::before,
.category-badge::before {
    content: "";
    width: 7px;
    height: 7px;
    border-radius: 99px;
    background: var(--primary);
}

h1,
h2,
h3 {
    margin: 0 0 16px;
    color: var(--deep);
    line-height: 1.18;
    letter-spacing: -0.03em;
}

h1 {
    font-size: clamp(34px, 7vw, 68px);
}

h2 {
    font-size: clamp(28px, 4vw, 46px);
}

h3 {
    font-size: 20px;
}

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

.lead {
    font-size: clamp(17px, 2.5vw, 21px);
    color: #475569;
}

.download-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 52px;
    padding: 0 28px;
    border-radius: 999px;
    background: var(--primary);
    color: #FFFFFF;
    font-weight: 800;
    box-shadow: 0 14px 34px rgba(41, 128, 254, 0.26);
    transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
    border: 0;
    cursor: pointer;
    white-space: nowrap;
}

.download-btn:hover {
    transform: translateY(-2px);
    background: var(--primary-dark);
    box-shadow: 0 18px 42px rgba(41, 128, 254, 0.32);
}

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

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

.web3-hero {
    position: relative;
    padding: 58px 0 54px;
    overflow: hidden;
    background:
        radial-gradient(circle at 14% 15%, rgba(41, 128, 254, 0.13), transparent 34%),
        radial-gradient(circle at 90% 20%, rgba(41, 128, 254, 0.10), transparent 30%),
        linear-gradient(180deg, #FFFFFF 0%, #F4F8FF 100%);
}

.web3-hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(41,128,254,0.08) 1px, transparent 1px),
        linear-gradient(90deg, rgba(41,128,254,0.08) 1px, transparent 1px);
    background-size: 48px 48px;
    mask-image: linear-gradient(180deg, rgba(0,0,0,0.45), transparent 75%);
    pointer-events: none;
}

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

.hero-content {
    display: grid;
    gap: 20px;
}

.hero-title span {
    color: var(--primary);
}

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

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

.security-tags span,
.feature-tags span {
    display: inline-flex;
    padding: 8px 12px;
    border: 1px solid var(--line);
    border-radius: 999px;
    color: #334155;
    background: rgba(255,255,255,0.82);
    font-size: 13px;
    font-weight: 750;
}

.hero-visual {
    position: relative;
    min-height: 410px;
    display: grid;
    place-items: center;
}

.hero-card {
    position: relative;
    width: min(430px, 94%);
    padding: 26px;
    border-radius: var(--radius-xl);
    background: rgba(255, 255, 255, 0.88);
    border: 1px solid rgba(226, 232, 240, 0.9);
    box-shadow: var(--shadow);
    backdrop-filter: blur(16px);
}

.hero-card img {
    width: 100%;
    max-height: 420px;
    object-fit: contain;
    filter: drop-shadow(0 28px 42px rgba(15, 23, 42, 0.10));
}

.float-tag {
    position: absolute;
    z-index: 2;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 13px;
    border-radius: 999px;
    background: #FFFFFF;
    color: var(--deep);
    border: 1px solid var(--line);
    box-shadow: var(--shadow-soft);
    font-size: 13px;
    font-weight: 850;
}

.float-tag::before {
    content: "";
    width: 8px;
    height: 8px;
    background: var(--primary);
    border-radius: 99px;
}

.float-tag.one { top: 14%; left: 0; }
.float-tag.two { top: 9%; right: 1%; }
.float-tag.three { bottom: 20%; left: -2%; }
.float-tag.four { bottom: 12%; right: 5%; }

.ecosystem-nav,
.category-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
}

.ecosystem-card,
.feature-card,
.risk-card,
.faq-item,
.info-card,
.step-card,
.check-card {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-soft);
}

.ecosystem-card {
    padding: 22px;
    display: grid;
    gap: 10px;
    min-height: 188px;
}

.ecosystem-card .tag {
    width: fit-content;
    padding: 5px 10px;
    border-radius: 999px;
    background: var(--primary-soft);
    color: var(--primary);
    font-size: 12px;
    font-weight: 850;
}

.feature-section {
    display: grid;
    gap: 24px;
    align-items: center;
    padding: 30px;
    border-radius: var(--radius-xl);
    background: var(--surface);
    border: 1px solid var(--line);
    box-shadow: var(--shadow-soft);
}

.feature-section.alt,
.hardware-wallet-section {
    background:
        radial-gradient(circle at 10% 10%, rgba(41,128,254,0.10), transparent 28%),
        var(--bg-soft);
}

.feature-section .visual-wrap,
.visual-wrap {
    padding: 18px;
    border-radius: 28px;
    background: linear-gradient(135deg, #FFFFFF, #EEF5FF);
    border: 1px solid var(--line);
}

.feature-section .visual-wrap img {
    width: 100%;
    max-height: 380px;
    object-fit: contain;
}

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

.point-list li,
.clean-list li {
    position: relative;
    padding-left: 28px;
    color: #475569;
}

.point-list li::before,
.clean-list li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 11px;
    width: 10px;
    height: 10px;
    border-radius: 99px;
    background: var(--primary);
    box-shadow: 0 0 0 5px var(--primary-soft);
}

.privacy-section {
    display: grid;
    gap: 18px;
}

.privacy-panel {
    padding: 28px;
    border-radius: var(--radius-xl);
    background: linear-gradient(135deg, #FFFFFF 0%, #F4F8FF 100%);
    border: 1px solid var(--line);
    box-shadow: var(--shadow-soft);
}

.submit-chain-section,
.developer-center-section {
    display: grid;
    gap: 22px;
    padding: 30px;
    border-radius: var(--radius-xl);
    border: 1px solid var(--line);
    background: #FFFFFF;
    box-shadow: var(--shadow-soft);
}

.submit-card {
    display: grid;
    gap: 14px;
    padding: 22px;
    border-radius: 24px;
    background: linear-gradient(180deg, #F7FAFF, #FFFFFF);
    border: 1px solid var(--line);
}

.code-panel {
    background: #F8FBFF;
    border: 1px solid #DCE8F8;
    border-radius: 24px;
    overflow: hidden;
}

.code-panel-header {
    display: flex;
    gap: 8px;
    padding: 14px 18px;
    border-bottom: 1px solid var(--line);
}

.code-dot {
    width: 11px;
    height: 11px;
    border-radius: 99px;
    background: var(--primary);
    opacity: 0.55;
}

.code-panel pre {
    margin: 0;
    padding: 22px;
    overflow: auto;
    color: #1E293B;
    font-size: 13px;
    line-height: 1.8;
    white-space: pre-wrap;
}

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

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

.step-card::before {
    counter-increment: step;
    content: counter(step, decimal-leading-zero);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 46px;
    height: 46px;
    border-radius: 16px;
    background: var(--primary);
    color: #FFFFFF;
    font-weight: 900;
    margin-bottom: 16px;
}

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

.risk-card {
    padding: 22px;
    border-left: 4px solid var(--primary);
}

.risk-card strong {
    color: var(--deep);
}

.faq-grid {
    display: grid;
    gap: 14px;
}

.faq-item {
    padding: 22px;
}

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

.cta-section {
    text-align: center;
    padding: 52px 24px;
    border-radius: var(--radius-xl);
    background:
        radial-gradient(circle at 30% 20%, rgba(41,128,254,0.15), transparent 34%),
        linear-gradient(135deg, #EEF6FF 0%, #FFFFFF 100%);
    border: 1px solid var(--line);
    box-shadow: var(--shadow-soft);
}

.cta-section p {
    max-width: 720px;
    margin-left: auto;
    margin-right: auto;
}

.page-hero {
    padding: 58px 0 36px;
    background:
        radial-gradient(circle at 15% 10%, rgba(41,128,254,0.12), transparent 26%),
        linear-gradient(180deg, #FFFFFF 0%, #F7FAFF 100%);
}

.page-hero .lead {
    max-width: 820px;
}

.content-layout {
    display: grid;
    gap: 22px;
    align-items: start;
}

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

.article-panel {
    padding: 26px;
    border-radius: var(--radius-xl);
    background: #FFFFFF;
    border: 1px solid var(--line);
    box-shadow: var(--shadow-soft);
}

.article-panel h2 {
    font-size: clamp(24px, 3vw, 34px);
}

.side-panel {
    display: grid;
    gap: 14px;
}

.check-card {
    padding: 20px;
}

.check-card h3 {
    display: flex;
    align-items: center;
    gap: 10px;
}

.check-card h3::before {
    content: "";
    width: 10px;
    height: 10px;
    border-radius: 99px;
    background: var(--primary);
}

.download-single {
    padding-top: 10px;
}

.hero-mini-grid {
    display: grid;
    gap: 18px;
}

.install-steps {
    display: grid;
    gap: 14px;
    padding: 0;
    margin: 0;
    list-style: none;
}

.install-steps li {
    padding: 20px;
    border-radius: 22px;
    background: #FFFFFF;
    border: 1px solid var(--line);
    box-shadow: var(--shadow-soft);
}

.install-steps span {
    display: inline-flex;
    width: 34px;
    height: 34px;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    background: var(--primary);
    color: #FFFFFF;
    font-weight: 850;
    margin-right: 8px;
}

.site-footer {
    margin-top: 70px;
    padding: 50px 0 22px;
    background: #F2F6FB;
    border-top: 1px solid var(--line);
}

.footer-grid {
    display: grid;
    gap: 28px;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
    color: var(--deep);
}

.footer-brand img {
    width: 36px;
    height: 36px;
    object-fit: contain;
    border-radius: 12px;
}

.site-footer h3 {
    font-size: 16px;
    margin-bottom: 12px;
}

.site-footer a {
    display: block;
    color: var(--muted);
    margin: 8px 0;
}

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

.footer-bottom {
    border-top: 1px solid var(--line);
    margin-top: 30px;
    padding-top: 18px;
    display: flex;
    gap: 10px;
    flex-direction: column;
    color: var(--muted);
    font-size: 13px;
}

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

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

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

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

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

@media (min-width: 860px) {
    .nav-toggle {
        display: none;
    }

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

    .site-nav a {
        font-size: 13px;
        padding: 9px 10px;
    }

    .hero-grid {
        grid-template-columns: minmax(0, 1.05fr) minmax(360px, 0.95fr);
    }

    .web3-hero {
        padding: 88px 0 76px;
    }

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

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

    .feature-section {
        grid-template-columns: 1fr 0.86fr;
        padding: 42px;
    }

    .feature-section.reverse {
        grid-template-columns: 0.88fr 1fr;
    }

    .feature-section.reverse .visual-wrap {
        order: -1;
    }

    .privacy-section {
        grid-template-columns: 1fr 1fr;
    }

    .submit-chain-section {
        grid-template-columns: 1fr 0.82fr;
        padding: 42px;
    }

    .developer-center-section {
        grid-template-columns: 0.9fr 1fr;
        padding: 42px;
    }

    .process-steps {
        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) 330px;
    }

    .hero-mini-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (min-width: 1080px) {
    .site-nav a {
        font-size: 14px;
        padding: 10px 12px;
    }

    .section {
        padding: 82px 0;
    }

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

@media (max-width: 520px) {
    .container {
        width: min(100% - 24px, 1180px);
    }

    .site-nav.open {
        grid-template-columns: 1fr;
    }

    .hero-visual {
        min-height: 330px;
    }

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

    .float-tag.one { left: 2%; }
    .float-tag.two { right: 2%; }
    .float-tag.three { left: 2%; }
    .float-tag.four { right: 2%; }

    .download-btn {
        width: 100%;
        min-height: 54px;
    }

    .feature-section,
    .submit-chain-section,
    .developer-center-section,
    .article-panel {
        padding: 22px;
    }
}