:root {
    --primary: #2980FE;
    --primary-soft: #EAF3FF;
    --primary-pale: #F4F8FF;
    --white: #FFFFFF;
    --gray-50: #F7F9FC;
    --gray-100: #EEF2F7;
    --gray-200: #DDE5EF;
    --gray-500: #667085;
    --gray-700: #344054;
    --gray-900: #101828;
    --shadow: 0 18px 45px rgba(16, 24, 40, 0.08);
    --radius-lg: 32px;
    --radius-md: 24px;
    --radius-sm: 18px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang TC", "Noto Sans TC", "Microsoft JhengHei", Arial, sans-serif;
    color: var(--gray-900);
    background: linear-gradient(180deg, var(--white) 0%, var(--gray-50) 48%, var(--white) 100%);
    line-height: 1.72;
    overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
p { color: var(--gray-500); margin: 0 0 16px; }
h1, h2, h3 { color: var(--gray-900); line-height: 1.18; margin: 0 0 16px; letter-spacing: -0.02em; }
h1 { font-size: clamp(2.1rem, 8vw, 4.9rem); }
h2 { font-size: clamp(1.8rem, 5vw, 3rem); }
h3 { font-size: 1.18rem; }
ul, ol { margin: 0; padding-left: 20px; color: var(--gray-500); }
.site-header {
    position: sticky;
    top: 0;
    z-index: 99;
    background: rgba(255, 255, 255, 0.9);
    border-bottom: 1px solid rgba(221, 229, 239, 0.75);
    backdrop-filter: blur(18px);
}
.header-inner { width: min(1180px, calc(100% - 32px)); margin: 0 auto; 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(--gray-900); letter-spacing: -0.03em; }
.logo img { width: 38px; height: 38px; object-fit: contain; border-radius: 12px; }
.nav-toggle { width: 44px; height: 44px; border: 1px solid var(--gray-200); background: var(--white); border-radius: 14px; display: inline-flex; flex-direction: column; align-items: center; justify-content: center; gap: 5px; }
.nav-toggle span { width: 18px; height: 2px; background: var(--gray-700); border-radius: 999px; }
.primary-nav { position: absolute; top: 72px; left: 16px; right: 16px; display: none; flex-direction: column; padding: 14px; background: var(--white); border: 1px solid var(--gray-200); border-radius: 22px; box-shadow: var(--shadow); }
.primary-nav.open { display: flex; }
.primary-nav a { padding: 12px 14px; border-radius: 14px; color: var(--gray-500); font-size: 0.95rem; font-weight: 650; }
.primary-nav a.active, .primary-nav a:hover { color: var(--primary); background: var(--primary-soft); }
.site-main { min-height: 60vh; }
.container { width: min(1180px, calc(100% - 32px)); margin: 0 auto; }
.narrow-container { width: min(900px, calc(100% - 32px)); margin: 0 auto; }
.section { padding: 68px 0; }
.gradient-bg { background: radial-gradient(circle at 10% 10%, rgba(41,128,254,0.16), transparent 34%), radial-gradient(circle at 85% 20%, rgba(41,128,254,0.10), transparent 30%), linear-gradient(180deg, #FFFFFF 0%, #F4F8FF 100%); }
.web3-hero { position: relative; overflow: hidden; padding: 64px 0 44px; }
.web3-hero::before { content: ""; position: absolute; inset: 30px -20% auto auto; width: 520px; height: 520px; border-radius: 50%; background: radial-gradient(circle, rgba(41, 128, 254, 0.18), transparent 64%); pointer-events: none; }
.hero-grid { position: relative; display: grid; gap: 34px; align-items: center; }
.eyebrow, .category-badge { display: inline-flex; align-items: center; width: fit-content; gap: 8px; padding: 8px 13px; margin-bottom: 18px; color: var(--primary); background: var(--primary-soft); border: 1px solid rgba(41,128,254,0.18); border-radius: 999px; font-size: 0.88rem; font-weight: 750; }
.hero-copy .lead, .page-hero .lead, .section-lead { font-size: 1.08rem; color: var(--gray-500); max-width: 720px; }
.download-btn { display: inline-flex; align-items: center; justify-content: center; min-height: 52px; padding: 0 24px; color: var(--white); background: var(--primary); border-radius: 999px; font-weight: 800; box-shadow: 0 16px 35px rgba(41, 128, 254, 0.24); transition: transform 0.2s ease, box-shadow 0.2s ease; border: none; cursor: pointer; white-space: nowrap; }
.download-btn:hover { transform: translateY(-2px); box-shadow: 0 20px 45px rgba(41, 128, 254, 0.30); }
.hero-actions { margin: 26px 0 22px; }
.security-tags, .float-tags, .mini-tags { display: flex; flex-wrap: wrap; gap: 10px; }
.security-tags span, .float-tags span, .mini-tags span { display: inline-flex; align-items: center; padding: 8px 12px; background: var(--white); color: var(--gray-700); border: 1px solid var(--gray-200); border-radius: 999px; font-size: 0.86rem; font-weight: 650; }
.hero-visual { position: relative; padding: 22px; border-radius: var(--radius-lg); background: linear-gradient(145deg, rgba(255,255,255,0.92), rgba(234,243,255,0.82)); border: 1px solid rgba(221, 229, 239, 0.9); box-shadow: var(--shadow); }
.hero-visual img { width: min(420px, 84%); margin: 0 auto; filter: drop-shadow(0 28px 34px rgba(16, 24, 40, 0.14)); }
.float-tags { margin-top: 18px; justify-content: center; }
.ecosystem-nav, .category-grid, .risk-grid, .faq-grid, .card-grid, .process-steps { display: grid; gap: 16px; }
.ecosystem-card, .info-card, .risk-card, .faq-item, .step-card, .note-panel, .side-panel, .article-card { background: var(--white); border: 1px solid var(--gray-200); border-radius: var(--radius-md); box-shadow: 0 12px 32px rgba(16, 24, 40, 0.05); }
.ecosystem-card, .info-card, .risk-card, .faq-item, .step-card, .article-card { padding: 22px; }
.ecosystem-card { position: relative; overflow: hidden; }
.ecosystem-card::after { content: ""; position: absolute; top: 0; left: 22px; right: 22px; height: 3px; background: var(--primary); border-radius: 999px; opacity: 0.8; }
.ecosystem-card .tag, .risk-label { display: inline-flex; padding: 5px 10px; margin-bottom: 12px; color: var(--primary); background: var(--primary-soft); border-radius: 999px; font-size: 0.78rem; font-weight: 800; }
.text-link { display: inline-flex; margin-top: 8px; color: var(--primary); font-weight: 800; }
.text-link::after { content: " →"; }
.split-section { display: grid; gap: 26px; align-items: center; border-radius: var(--radius-lg); padding: 26px; background: var(--white); border: 1px solid var(--gray-200); box-shadow: var(--shadow); }
.split-section.reverse { background: linear-gradient(145deg, var(--gray-50), var(--primary-pale)); }
.visual-card { border-radius: var(--radius-lg); background: linear-gradient(145deg, #F4F8FF, #FFFFFF); border: 1px solid var(--gray-200); padding: 24px; min-height: 260px; display: flex; align-items: center; justify-content: center; }
.visual-card img { max-height: 360px; object-fit: contain; }
.feature-list { display: grid; gap: 12px; margin: 20px 0; padding: 0; list-style: none; }
.feature-list li { position: relative; padding-left: 28px; color: var(--gray-700); }
.feature-list li::before { content: ""; position: absolute; top: 0.74em; left: 4px; width: 10px; height: 10px; border: 3px solid var(--primary); border-radius: 50%; }
.privacy-section, .submit-chain-section, .developer-center-section, .safety-panel, .cta-section { border-radius: var(--radius-lg); border: 1px solid var(--gray-200); box-shadow: var(--shadow); }
.privacy-section { padding: 28px; background: linear-gradient(135deg, #FFFFFF 0%, #F4F8FF 100%); }
.submit-chain-section { padding: 28px; background: linear-gradient(135deg, rgba(41,128,254,0.09), rgba(255,255,255,0.9)), var(--white); }
.developer-center-section { display: grid; gap: 20px; padding: 28px; background: #FFFFFF; }
.code-panel { color: #D8E6FF; background: linear-gradient(145deg, #172033, #22304A); border-radius: var(--radius-md); padding: 22px; overflow: hidden; border: 1px solid rgba(41, 128, 254, 0.18); }
.code-panel pre { margin: 0; white-space: pre-wrap; font-size: 0.86rem; line-height: 1.7; }
.process-steps { counter-reset: step; }
.step-card { position: relative; padding-top: 56px; }
.step-card::before { counter-increment: step; content: counter(step); position: absolute; left: 22px; top: 20px; width: 30px; height: 30px; display: grid; place-items: center; color: var(--white); background: var(--primary); border-radius: 10px; font-weight: 850; }
.risk-card { border-left: 4px solid var(--primary); }
.risk-card strong { display: block; color: var(--gray-900); margin-bottom: 8px; }
.faq-item h3 { margin-bottom: 8px; }
.cta-section { padding: 38px 24px; text-align: center; background: radial-gradient(circle at 50% 0%, rgba(41,128,254,0.16), transparent 42%), linear-gradient(180deg, #FFFFFF, #F4F8FF); }
.cta-section .download-btn { margin-top: 14px; }
.page-hero { padding: 58px 0 36px; background: radial-gradient(circle at 16% 10%, rgba(41, 128, 254, 0.14), transparent 28%), linear-gradient(180deg, #FFFFFF 0%, #F4F8FF 100%); border-bottom: 1px solid var(--gray-200); }
.article-layout { display: grid; gap: 24px; padding: 48px 0 76px; }
.article-main { display: grid; gap: 22px; }
.article-card h2 { font-size: clamp(1.4rem, 4vw, 2.1rem); }
.side-panel { padding: 22px; align-self: start; position: sticky; top: 96px; }
.side-panel a { display: block; padding: 12px 0; color: var(--primary); font-weight: 750; border-bottom: 1px solid var(--gray-100); }
.note-panel { padding: 22px; background: var(--primary-pale); }
.note-panel h3 { color: var(--primary); }
.download-panel { margin-top: 4px; padding: 24px; border-radius: var(--radius-md); background: var(--white); border: 1px solid var(--gray-200); text-align: center; }
.site-footer { background: #F3F6FA; border-top: 1px solid var(--gray-200); padding-top: 42px; }
.footer-grid { display: grid; gap: 26px; }
.site-footer h3 { font-size: 1rem; }
.site-footer a { display: block; color: var(--gray-500); margin-bottom: 9px; }
.site-footer a:hover { color: var(--primary); }
.footer-bottom { margin-top: 32px; padding: 18px; border-top: 1px solid var(--gray-200); text-align: center; }
.footer-bottom p { margin: 0; font-size: 0.92rem; }
@media (min-width: 640px) {
    .ecosystem-nav, .category-grid, .faq-grid, .card-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .risk-grid, .process-steps { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (min-width: 900px) {
    .section { padding: 86px 0; }
    .web3-hero { padding: 92px 0 58px; }
    .nav-toggle { display: none; }
    .primary-nav { position: static; display: flex; flex-direction: row; align-items: center; gap: 2px; width: auto; padding: 0; border: 0; border-radius: 0; box-shadow: none; background: transparent; }
    .primary-nav a { padding: 9px 10px; font-size: 0.9rem; }
    .hero-grid, .split-section, .developer-center-section, .article-layout { grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr); }
    .split-section { padding: 36px; }
    .split-section.reverse .section-copy { order: 2; }
    .split-section.reverse .visual-card { order: 1; }
    .ecosystem-nav { grid-template-columns: repeat(4, minmax(0, 1fr)); }
    .ecosystem-card:nth-child(1), .ecosystem-card:nth-child(7) { grid-column: span 2; }
    .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)); }
    .footer-grid { grid-template-columns: 1.4fr 0.8fr 0.8fr; }
}
@media (min-width: 1120px) {
    .primary-nav a { padding: 10px 12px; }
    .risk-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}
@media (max-width: 420px) {
    .header-inner, .container, .narrow-container { width: min(100% - 24px, 1180px); }
    .split-section, .privacy-section, .submit-chain-section, .developer-center-section { padding: 20px; }
    .download-btn { width: 100%; }
}