* {
    box-sizing: border-box;
}

:root {
    --primary: #2980FE;
    --primary-dark: #1765d6;
    --primary-soft: #EAF3FF;
    --bg: #F7FAFF;
    --bg-soft: #F2F6FC;
    --white: #FFFFFF;
    --text: #263244;
    --muted: #64748B;
    --light: #E6ECF5;
    --line: #DDE6F2;
    --shadow: 0 18px 45px rgba(41, 128, 254, 0.10);
    --shadow-soft: 0 12px 32px rgba(20, 34, 54, 0.08);
    --radius: 24px;
    --radius-lg: 32px;
    --max: 1180px;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans TC", "Microsoft JhengHei", Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.75;
    overflow-x: hidden;
}

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

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

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

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

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

.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(221, 230, 242, 0.85);
}

.header-inner {
    width: min(100% - 32px, var(--max));
    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;
    letter-spacing: 0.02em;
    color: #192234;
    white-space: nowrap;
}

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

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

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

.site-nav {
    position: absolute;
    top: 72px;
    left: 16px;
    right: 16px;
    display: none;
    flex-direction: column;
    gap: 4px;
    padding: 12px;
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: 20px;
    box-shadow: var(--shadow-soft);
}

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

.site-nav a {
    padding: 10px 12px;
    border-radius: 12px;
    font-size: 15px;
    color: #405066;
}

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

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

.narrow-container {
    width: min(100% - 32px, 860px);
    margin: 0 auto;
}

.portal-hero {
    position: relative;
    overflow: hidden;
    padding: 56px 0 28px;
    background:
        radial-gradient(circle at 18% 18%, rgba(41, 128, 254, 0.18), transparent 34%),
        linear-gradient(135deg, #FFFFFF 0%, #F0F6FF 58%, #EAF3FF 100%);
}

.portal-hero::after {
    content: "";
    position: absolute;
    right: -90px;
    top: 70px;
    width: 260px;
    height: 260px;
    border-radius: 50%;
    background: rgba(41, 128, 254, 0.13);
    filter: blur(8px);
}

.hero-grid {
    position: relative;
    z-index: 1;
    display: grid;
    gap: 34px;
    align-items: center;
}

.eyebrow,
.category-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    width: fit-content;
    padding: 7px 12px;
    border: 1px solid rgba(41, 128, 254, 0.20);
    border-radius: 999px;
    background: rgba(41, 128, 254, 0.08);
    color: var(--primary);
    font-size: 13px;
    font-weight: 700;
}

.hero-content h1 {
    margin-top: 18px;
    font-size: clamp(34px, 9vw, 66px);
    letter-spacing: -0.055em;
}

.hero-content .lead {
    margin-top: 18px;
    max-width: 620px;
    font-size: 18px;
    color: #4b5d73;
}

.download-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    min-width: 138px;
    padding: 13px 24px;
    border-radius: 999px;
    background: var(--primary);
    color: var(--white);
    font-weight: 800;
    box-shadow: 0 14px 30px rgba(41, 128, 254, 0.24);
    transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}

.download-btn:hover {
    transform: translateY(-2px);
    background: var(--primary-dark);
    box-shadow: 0 18px 38px rgba(41, 128, 254, 0.30);
}

.hero-actions {
    display: flex;
    align-items: center;
    gap: 14px;
    flex-wrap: wrap;
    margin-top: 26px;
}

.security-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 20px;
}

.security-tags span,
.tag {
    display: inline-flex;
    align-items: center;
    border-radius: 999px;
    padding: 8px 12px;
    background: var(--white);
    border: 1px solid var(--line);
    color: #4b5d73;
    font-size: 13px;
    box-shadow: 0 8px 20px rgba(20, 34, 54, 0.04);
}

.hero-visual {
    position: relative;
    min-height: 390px;
    padding: 28px;
    border-radius: var(--radius-lg);
    background: rgba(255, 255, 255, 0.78);
    border: 1px solid rgba(255,255,255,.8);
    box-shadow: var(--shadow);
    overflow: hidden;
}

.hero-visual::before {
    content: "";
    position: absolute;
    inset: 22px;
    border-radius: 28px;
    background: linear-gradient(150deg, rgba(41,128,254,.12), rgba(255,255,255,.1));
}

.hero-visual img {
    position: relative;
    z-index: 2;
    width: min(76%, 340px);
    margin: 0 auto;
    filter: drop-shadow(0 28px 38px rgba(20, 34, 54, .18));
}

.float-card {
    position: absolute;
    z-index: 4;
    background: rgba(255, 255, 255, .92);
    border: 1px solid var(--line);
    border-radius: 18px;
    box-shadow: var(--shadow-soft);
    padding: 12px 14px;
}

.float-card strong {
    display: block;
    color: var(--text);
    font-size: 14px;
}

.float-card small {
    color: var(--muted);
}

.asset-card {
    left: 18px;
    bottom: 28px;
    width: 190px;
}

.float-tag {
    right: 20px;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--primary);
    font-weight: 800;
    font-size: 13px;
}

.float-tag.one { top: 32px; }
.float-tag.two { top: 92px; }
.float-tag.three { top: 152px; }

.section {
    padding: 58px 0;
}

.section-header {
    margin-bottom: 26px;
    display: grid;
    gap: 10px;
}

.section-header.center {
    text-align: center;
    justify-items: center;
}

.section-header h2,
.page-hero h1 {
    font-size: clamp(26px, 6vw, 44px);
    letter-spacing: -0.035em;
}

.section-header p {
    max-width: 720px;
}

.channel-nav {
    display: grid;
    grid-template-columns: 1fr;
    gap: 14px;
    margin-top: -6px;
}

.channel-card,
.feature-card,
.category-card,
.risk-card,
.faq-item,
.info-card,
.step-card {
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    box-shadow: 0 10px 26px rgba(20, 34, 54, 0.05);
}

.channel-card {
    padding: 18px;
    display: grid;
    gap: 8px;
    min-height: 156px;
    transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease;
}

.channel-card:hover,
.category-card:hover {
    transform: translateY(-4px);
    border-color: rgba(41, 128, 254, .28);
    box-shadow: var(--shadow);
}

.channel-card .label {
    width: fit-content;
    padding: 4px 9px;
    border-radius: 999px;
    background: var(--primary-soft);
    color: var(--primary);
    font-size: 12px;
    font-weight: 800;
}

.channel-card h3,
.feature-card h3,
.category-card h3 {
    font-size: 20px;
}

.text-link {
    color: var(--primary);
    font-weight: 800;
}

.split-feature {
    display: grid;
    gap: 28px;
    align-items: center;
    padding: 28px;
    border-radius: var(--radius-lg);
    background: var(--white);
    border: 1px solid var(--line);
    box-shadow: var(--shadow-soft);
    overflow: hidden;
}

.split-feature.gradient-bg,
.gradient-bg {
    background: linear-gradient(135deg, #FFFFFF 0%, #F2F7FF 100%);
}

.split-feature.soft-bg {
    background: #F5F8FD;
}

.split-text h2 {
    font-size: clamp(25px, 6vw, 40px);
    margin-bottom: 14px;
}

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

.check-list li {
    position: relative;
    padding-left: 26px;
    color: #4b5d73;
}

.check-list li::before {
    content: "";
    position: absolute;
    left: 0;
    top: .72em;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--primary);
    box-shadow: 0 0 0 5px rgba(41, 128, 254, .12);
}

.split-image {
    position: relative;
    padding: 20px;
    border-radius: 28px;
    background: linear-gradient(160deg, rgba(41,128,254,.09), rgba(255,255,255,.9));
}

.split-image img {
    width: min(100%, 430px);
    margin: 0 auto;
    filter: drop-shadow(0 24px 32px rgba(20, 34, 54, .15));
}

.wallet-split,
.cold-wallet-split,
.swap-split,
.dapp-split {
    margin-top: 20px;
}

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

.safety-panel {
    padding: 18px;
    border-radius: 22px;
    background: var(--white);
    border: 1px solid var(--line);
    border-left: 5px solid var(--primary);
}

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

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

.step-card .num {
    width: 38px;
    height: 38px;
    display: inline-grid;
    place-items: center;
    border-radius: 14px;
    background: var(--primary);
    color: var(--white);
    font-weight: 900;
    margin-bottom: 12px;
}

.step-card h3 {
    font-size: 19px;
    margin-bottom: 8px;
}

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

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

.risk-card h3 {
    font-size: 19px;
    margin-bottom: 8px;
}

.risk-card strong {
    display: block;
    margin-top: 12px;
    color: var(--text);
}

.ecosystem-category,
.category-grid {
    display: grid;
    gap: 16px;
}

.category-card {
    padding: 22px;
    min-height: 188px;
    display: grid;
    align-content: start;
    gap: 10px;
}

.category-card .icon-dot,
.icon-dot {
    width: 38px;
    height: 38px;
    border-radius: 14px;
    display: inline-grid;
    place-items: center;
    background: var(--primary-soft);
    color: var(--primary);
    font-weight: 900;
}

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

.faq-item {
    padding: 20px;
}

.faq-item h3 {
    font-size: 18px;
    margin-bottom: 8px;
}

.cta-section {
    padding: 58px 0 74px;
}

.cta-card {
    text-align: center;
    padding: 34px 24px;
    border-radius: var(--radius-lg);
    background:
        radial-gradient(circle at 80% 20%, rgba(41,128,254,.16), transparent 28%),
        linear-gradient(135deg, #FFFFFF 0%, #ECF5FF 100%);
    border: 1px solid var(--line);
    box-shadow: var(--shadow);
}

.cta-card h2 {
    font-size: clamp(26px, 6vw, 42px);
    margin-bottom: 12px;
}

.page-hero {
    padding: 54px 0 34px;
    background:
        radial-gradient(circle at 10% 12%, rgba(41, 128, 254, .14), transparent 30%),
        linear-gradient(135deg, #FFFFFF 0%, #F1F7FF 100%);
    border-bottom: 1px solid var(--line);
}

.page-hero p {
    max-width: 760px;
    margin-top: 16px;
    font-size: 17px;
}

.page-layout {
    display: grid;
    gap: 22px;
    padding: 42px 0 64px;
}

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

.article-card h2 {
    margin: 10px 0 12px;
    font-size: 25px;
}

.article-card h3 {
    margin: 22px 0 8px;
    font-size: 20px;
}

.article-card p + p {
    margin-top: 10px;
}

.aside-card {
    display: grid;
    gap: 14px;
}

.info-card {
    padding: 20px;
}

.info-card h3 {
    font-size: 19px;
    margin-bottom: 8px;
}

.notice-box {
    margin: 22px 0;
    padding: 18px;
    border-radius: 22px;
    background: var(--primary-soft);
    border: 1px solid rgba(41, 128, 254, .18);
    color: #36516e;
}

.operation-list {
    display: grid;
    gap: 12px;
    counter-reset: item;
    padding: 0;
    list-style: none;
}

.operation-list li {
    counter-increment: item;
    position: relative;
    padding: 15px 16px 15px 56px;
    background: #F8FAFD;
    border: 1px solid var(--line);
    border-radius: 18px;
    color: #4b5d73;
}

.operation-list li::before {
    content: counter(item);
    position: absolute;
    left: 16px;
    top: 14px;
    width: 28px;
    height: 28px;
    border-radius: 11px;
    display: grid;
    place-items: center;
    background: var(--primary);
    color: var(--white);
    font-weight: 900;
}

.download-area {
    margin-top: 26px;
}

.download-page-card {
    display: grid;
    gap: 22px;
}

.download-steps {
    display: grid;
    gap: 14px;
}

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

.footer-inner {
    width: min(100% - 32px, var(--max));
    margin: 0 auto;
    display: grid;
    gap: 28px;
}

.footer-brand p {
    max-width: 500px;
    margin-top: 14px;
}

.footer-links {
    display: grid;
    gap: 22px;
}

.footer-links h3 {
    font-size: 16px;
    margin-bottom: 10px;
}

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

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

.footer-bottom {
    margin-top: 34px;
    padding: 18px 16px;
    border-top: 1px solid var(--line);
    text-align: center;
}

.footer-bottom p {
    margin: 0;
    font-size: 13px;
}

@media (min-width: 560px) {
    .channel-nav {
        grid-template-columns: repeat(2, 1fr);
    }

    .ecosystem-category,
    .category-grid,
    .risk-grid,
    .process-steps {
        grid-template-columns: repeat(2, 1fr);
    }

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

@media (min-width: 820px) {
    .section {
        padding: 74px 0;
    }

    .hero-grid,
    .split-feature {
        grid-template-columns: 1.05fr .95fr;
    }

    .split-feature.reverse .split-image {
        order: -1;
    }

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

    .download-page-card {
        grid-template-columns: minmax(0, 1fr) 320px;
    }
}

@media (min-width: 1024px) {
    .nav-toggle {
        display: none;
    }

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

    .site-nav a {
        font-size: 14px;
        padding: 9px 10px;
    }

    .portal-hero {
        padding: 84px 0 38px;
    }

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

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

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

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

    .footer-inner {
        grid-template-columns: .95fr 1.4fr;
    }
}

@media (max-width: 420px) {
    .header-inner,
    .container,
    .content-container,
    .narrow-container,
    .footer-inner {
        width: min(100% - 24px, var(--max));
    }

    .hero-visual {
        min-height: 330px;
        padding: 18px;
    }

    .asset-card {
        width: 170px;
        left: 12px;
        bottom: 18px;
    }

    .float-tag {
        right: 12px;
    }

    .float-tag.one { top: 22px; }
    .float-tag.two { top: 78px; }
    .float-tag.three { top: 134px; }

    .split-feature,
    .article-card {
        padding: 20px;
    }

    .download-btn {
        width: 100%;
    }
}