:root {
    --primary: #2980FE;
    --primary-soft: #eaf3ff;
    --primary-light: #f5f9ff;
    --text: #202a36;
    --muted: #647184;
    --line: #e6ebf2;
    --bg: #f6f9fc;
    --white: #ffffff;
    --shadow: 0 18px 45px rgba(41, 128, 254, 0.10);
    --radius: 26px;
}
* { box-sizing: border-box; }
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(--text);
    background: linear-gradient(180deg, #ffffff 0%, #f7fbff 45%, #ffffff 100%);
    line-height: 1.72;
    overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--line);
}
.nav-wrap {
    width: min(1160px, calc(100% - 32px));
    margin: 0 auto;
    min-height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}
.logo { display: inline-flex; align-items: center; gap: 10px; font-weight: 800; letter-spacing: .02em; }
.logo img { width: 38px; height: 38px; object-fit: contain; border-radius: 12px; }
.site-nav { display: none; width: 100%; flex-direction: column; gap: 8px; padding: 0 0 18px; }
.site-nav.open { display: flex; }
.site-nav a { color: var(--muted); font-size: 14px; padding: 9px 12px; border-radius: 999px; }
.site-nav a.active, .site-nav a:hover { color: var(--primary); background: var(--primary-soft); }
.nav-toggle { border: 1px solid var(--line); background: var(--white); border-radius: 999px; padding: 9px 14px; color: var(--text); }
main { min-height: 60vh; }
.container, .section, .page-hero, .content-container, .cta-section {
    width: min(1160px, calc(100% - 32px));
    margin: 0 auto;
}
.section { padding: 54px 0; }
.section-title { margin: 0 0 14px; font-size: clamp(28px, 5vw, 46px); line-height: 1.18; letter-spacing: -.04em; }
.section-lead { color: var(--muted); max-width: 760px; margin: 0 0 24px; }
.eyebrow, .category-badge {
    display: inline-flex;
    align-items: center;
    width: fit-content;
    color: var(--primary);
    background: var(--primary-soft);
    border: 1px solid rgba(41,128,254,.14);
    border-radius: 999px;
    padding: 7px 12px;
    font-size: 13px;
    font-weight: 800;
    margin-bottom: 14px;
}
.download-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 13px 24px;
    border-radius: 999px;
    background: var(--primary);
    color: #fff;
    font-weight: 800;
    box-shadow: 0 14px 30px rgba(41, 128, 254, 0.26);
    transition: transform .2s ease, box-shadow .2s ease;
}
.download-btn:hover { transform: translateY(-2px); box-shadow: 0 18px 36px rgba(41, 128, 254, 0.32); }
.text-link { color: var(--primary); font-weight: 800; display: inline-flex; gap: 6px; align-items: center; }
.web3-hero {
    position: relative;
    width: min(1160px, calc(100% - 32px));
    margin: 26px auto 0;
    padding: 34px 20px;
    border-radius: 32px;
    overflow: hidden;
    background:
        radial-gradient(circle at 82% 18%, rgba(41,128,254,.22), transparent 26%),
        linear-gradient(135deg, #ffffff 0%, #f4f9ff 58%, #edf6ff 100%);
    border: 1px solid var(--line);
    box-shadow: var(--shadow);
}
.web3-hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image: linear-gradient(rgba(41,128,254,.06) 1px, transparent 1px), linear-gradient(90deg, rgba(41,128,254,.06) 1px, transparent 1px);
    background-size: 38px 38px;
    mask-image: linear-gradient(90deg, transparent, #000 12%, #000 82%, transparent);
}
.hero-grid { position: relative; display: grid; gap: 30px; align-items: center; }
.hero-copy h1 { margin: 0; font-size: clamp(38px, 10vw, 68px); line-height: 1.05; letter-spacing: -.06em; }
.hero-copy p { color: var(--muted); font-size: 17px; margin: 18px 0 24px; max-width: 620px; }
.hero-tags, .floating-tags, .pill-row { display: flex; flex-wrap: wrap; gap: 10px; }
.hero-tags span, .floating-tags span, .pill-row span {
    background: rgba(255,255,255,.82);
    border: 1px solid var(--line);
    color: var(--text);
    padding: 8px 12px;
    border-radius: 999px;
    font-size: 13px;
    box-shadow: 0 10px 24px rgba(32,42,54,.05);
}
.hero-visual { position: relative; min-height: 260px; display: flex; align-items: center; justify-content: center; }
.hero-visual .device-card {
    width: min(360px, 84%);
    padding: 18px;
    border-radius: 32px;
    background: rgba(255,255,255,.76);
    border: 1px solid rgba(255,255,255,.92);
    box-shadow: 0 24px 60px rgba(41,128,254,.14);
}
.hero-visual img { margin: 0 auto; max-height: 420px; object-fit: contain; }
.floating-tags { margin-top: 16px; justify-content: center; }
.ecosystem-nav { padding: 34px 0 22px; }
.ecosystem-grid, .category-grid { display: grid; gap: 16px; grid-template-columns: 1fr; }
.ecosystem-card, .feature-card, .risk-card, .faq-item, .step-card, .info-card, .plain-card {
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 22px;
    box-shadow: 0 14px 36px rgba(32,42,54,.05);
}
.ecosystem-card { min-height: 180px; display: flex; flex-direction: column; justify-content: space-between; }
.ecosystem-card strong { color: var(--primary); font-size: 13px; }
.ecosystem-card h2, .feature-card h3, .risk-card h3, .step-card h3, .info-card h3, .plain-card h3 { margin: 8px 0 8px; font-size: 21px; line-height: 1.25; }
.ecosystem-card p, .feature-card p, .risk-card p, .step-card p, .info-card p, .plain-card p { color: var(--muted); margin: 0 0 14px; }
.feature-split, .feature-split.reverse, .developer-panel, .privacy-panel, .submit-panel {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
    align-items: center;
    border-radius: 32px;
    padding: 22px;
    background: var(--white);
    border: 1px solid var(--line);
    box-shadow: var(--shadow);
}
.web3-section .feature-split { background: linear-gradient(135deg, #ffffff, #f4f9ff); }
.hardware-wallet-section { background: linear-gradient(180deg, #f6f9fc, #ffffff); }
.hardware-wallet-section .feature-split { background: linear-gradient(135deg, #f7fbff, #ffffff); }
.digital-assets-section .feature-split { background: #ffffff; }
.swap-section .feature-split { background: linear-gradient(135deg, #ffffff, #f7fbff); }
.feature-copy h2, .developer-panel h2, .privacy-panel h2, .submit-panel h2 { margin: 0 0 12px; font-size: clamp(27px, 5vw, 42px); line-height: 1.18; letter-spacing: -.04em; }
.feature-copy p, .developer-panel p, .privacy-panel p, .submit-panel p { color: var(--muted); margin: 0 0 18px; }
.feature-list { display: grid; gap: 10px; padding: 0; margin: 18px 0; list-style: none; }
.feature-list li { padding: 12px 14px; border-radius: 16px; background: var(--primary-light); color: #314154; border: 1px solid #e8f1ff; }
.image-frame { border-radius: 28px; background: linear-gradient(160deg, #edf6ff, #ffffff); padding: 18px; border: 1px solid var(--line); }
.image-frame img { margin: 0 auto; max-height: 430px; object-fit: contain; }
.privacy-panel { background: linear-gradient(135deg, #ffffff, #f4f8fc); }
.privacy-grid { display: grid; gap: 14px; }
.submit-panel { background: radial-gradient(circle at top right, rgba(41,128,254,.16), transparent 30%), #ffffff; }
.submit-lines { display: grid; gap: 12px; margin-top: 18px; }
.submit-line { display: flex; gap: 12px; align-items: flex-start; padding: 14px; background: var(--primary-light); border: 1px solid #e8f1ff; border-radius: 18px; }
.submit-line span { width: 28px; height: 28px; display: inline-flex; align-items: center; justify-content: center; flex: 0 0 auto; color: #fff; background: var(--primary); border-radius: 50%; font-weight: 800; }
.developer-panel { background: linear-gradient(135deg, #f8fbff, #ffffff); }
.code-card { background: #f1f6fd; border: 1px solid #dfe9f7; border-radius: 24px; padding: 18px; font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; color: #314154; overflow: hidden; }
.code-card .line { display: block; padding: 7px 0; border-bottom: 1px solid rgba(41,128,254,.08); }
.process-steps { display: grid; gap: 16px; counter-reset: steps; }
.step-card { position: relative; padding-left: 76px; }
.step-card::before {
    counter-increment: steps;
    content: counter(steps, decimal-leading-zero);
    position: absolute;
    left: 22px;
    top: 24px;
    width: 40px;
    height: 40px;
    border-radius: 14px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--primary);
    color: #fff;
    font-weight: 900;
}
.risk-grid { display: grid; gap: 16px; grid-template-columns: 1fr; }
.risk-card { border-left: 4px solid var(--primary); }
.risk-card .suggest { margin-top: 10px; padding-top: 10px; border-top: 1px solid var(--line); color: #405166; }
.faq-list { display: grid; gap: 14px; }
.faq-item h2, .faq-item h3 { margin: 0 0 8px; font-size: 19px; }
.faq-item p { margin: 0; color: var(--muted); }
.cta-section { margin-top: 36px; margin-bottom: 62px; padding: 34px 22px; text-align: center; border-radius: 32px; background: linear-gradient(135deg, #eef6ff, #ffffff); border: 1px solid var(--line); box-shadow: var(--shadow); }
.cta-section h2 { margin: 0 0 12px; font-size: clamp(28px, 5vw, 44px); letter-spacing: -.04em; }
.cta-section p { color: var(--muted); margin: 0 auto 22px; max-width: 720px; }
.page-hero { padding: 42px 0 20px; }
.page-hero-inner { border-radius: 32px; padding: 28px 22px; background: radial-gradient(circle at top right, rgba(41,128,254,.18), transparent 32%), linear-gradient(135deg, #ffffff, #f4f9ff); border: 1px solid var(--line); box-shadow: var(--shadow); }
.page-hero h1 { margin: 0; font-size: clamp(34px, 8vw, 58px); line-height: 1.08; letter-spacing: -.06em; }
.page-hero p { color: var(--muted); max-width: 780px; margin: 16px 0 0; }
.content-container { display: grid; gap: 22px; padding: 28px 0 64px; }
.article-layout { display: grid; gap: 22px; }
.article-main { background: #fff; border: 1px solid var(--line); border-radius: 30px; padding: 24px; box-shadow: 0 14px 36px rgba(32,42,54,.05); }
.article-main h2 { margin: 0 0 10px; font-size: 25px; }
.article-main p { color: var(--muted); margin: 0 0 16px; }
.safety-panel { background: var(--primary-light); border: 1px solid #dcecff; border-radius: 24px; padding: 20px; }
.safety-panel h2, .safety-panel h3 { margin: 0 0 12px; }
.check-list { display: grid; gap: 10px; padding: 0; margin: 0; list-style: none; }
.check-list li { padding: 12px 14px; background: #fff; border: 1px solid var(--line); border-radius: 16px; color: #405166; }
.side-panel { display: grid; gap: 16px; align-content: start; }
.download-single { margin-top: 22px; }
.download-steps { display: grid; gap: 14px; margin-top: 18px; }
.download-step { padding: 16px; border: 1px solid var(--line); border-radius: 20px; background: var(--white); }
.site-footer { background: #172132; color: #d7e0ec; padding: 48px 0 22px; }
.footer-grid { width: min(1160px, calc(100% - 32px)); margin: 0 auto; display: grid; gap: 26px; }
.footer-brand { color: #fff; font-size: 22px; font-weight: 900; margin-bottom: 10px; }
.site-footer p { color: #aebbd0; margin: 0; max-width: 520px; }
.site-footer h2 { color: #fff; font-size: 16px; margin: 0 0 12px; }
.site-footer a { display: block; color: #aebbd0; margin: 8px 0; }
.footer-bottom { width: min(1160px, calc(100% - 32px)); margin: 32px auto 0; padding-top: 20px; border-top: 1px solid rgba(255,255,255,.1); color: #8c9bb1; font-size: 13px; }
@media (min-width: 640px) {
    .ecosystem-grid, .category-grid { grid-template-columns: repeat(2, 1fr); }
    .risk-grid { grid-template-columns: repeat(2, 1fr); }
    .privacy-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 900px) {
    .nav-toggle { display: none; }
    .site-nav { display: flex; flex-direction: row; align-items: center; justify-content: flex-end; width: auto; padding: 0; gap: 2px; }
    .site-nav a { font-size: 13px; padding: 9px 10px; }
    .web3-hero { padding: 58px; }
    .hero-grid { grid-template-columns: 1.03fr .97fr; }
    .ecosystem-grid { grid-template-columns: repeat(7, 1fr); }
    .ecosystem-card { grid-column: span 2; }
    .ecosystem-card:nth-child(1), .ecosystem-card:nth-child(7) { grid-column: span 3; }
    .feature-split { grid-template-columns: 1.05fr .95fr; padding: 38px; }
    .feature-split.reverse { grid-template-columns: .95fr 1.05fr; }
    .feature-split.reverse .feature-copy { order: 2; }
    .feature-split.reverse .image-frame { order: 1; }
    .developer-panel, .submit-panel, .privacy-panel { grid-template-columns: 1fr 1fr; padding: 38px; }
    .process-steps { grid-template-columns: repeat(3, 1fr); }
    .risk-grid { grid-template-columns: repeat(4, 1fr); }
    .article-layout { grid-template-columns: minmax(0, 1fr) 330px; align-items: start; }
    .article-main { padding: 34px; }
    .footer-grid { grid-template-columns: 1.3fr .7fr .7fr; }
}
@media (min-width: 1120px) {
    .site-nav a { padding: 10px 12px; }
}