/* ===== Reset & Base ===== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", sans-serif;
    line-height: 1.7; color: #1a1a2e; background: #fff; -webkit-font-smoothing: antialiased;
}
a { text-decoration: none; color: inherit; }
img { max-width: 100%; }
ul { list-style: none; }
section { padding: 80px 20px; max-width: 1200px; margin: 0 auto; }
h2 { font-size: 2em; text-align: center; margin-bottom: 12px; color: #1a1a2e; }
.section-desc { text-align: center; color: #666; margin-bottom: 48px; font-size: 1.1em; }

/* ===== Nav ===== */
.nav { position: fixed; top: 0; width: 100%; background: rgba(255,255,255,0.95); backdrop-filter: blur(10px); z-index: 1000; border-bottom: 1px solid #eee; }
.nav-inner { max-width: 1200px; margin: 0 auto; padding: 0 20px; display: flex; align-items: center; justify-content: space-between; height: 64px; }
.logo { font-size: 1.3em; font-weight: 700; color: #0088cc; }
.logo span { color: #1a1a2e; }
.nav-links { display: flex; gap: 28px; align-items: center; }
.nav-links a { font-size: 0.95em; color: #555; transition: color .2s; }
.nav-links a:hover { color: #0088cc; }
.nav-cta { background: #0088cc; color: #fff !important; padding: 8px 18px; border-radius: 6px; font-weight: 600; }
.nav-cta:hover { background: #006699 !important; color: #fff !important; }

/* ===== Hero ===== */
.hero { padding: 120px 20px 80px; background: linear-gradient(135deg, #0d0d1a 0%, #1a1a2e 50%, #0d1526 100%); text-align: left; overflow: hidden; }
.hero-inner { max-width: 1200px; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; gap: 40px; }
.hero-content { flex: 1; max-width: 560px; }
.hero-badge { display: inline-block; background: linear-gradient(135deg, #ff4444, #ff6b35); color: #fff; padding: 8px 20px; border-radius: 20px; font-size: 0.9em; font-weight: 600; margin-bottom: 24px; box-shadow: 0 4px 15px rgba(255,68,68,0.3); }
.hero h1 { font-size: 3.5em; font-weight: 800; margin-bottom: 20px; color: #fff; text-shadow: 0 2px 10px rgba(0,0,0,0.3); }
.hero-subtitle { font-size: 1.2em; color: rgba(255,255,255,0.8); margin-bottom: 36px; line-height: 1.9; }
.hero-buttons { display: flex; gap: 16px; margin-bottom: 48px; }
.btn-primary { background: linear-gradient(135deg, #ff4444, #ff6b35); color: #fff; padding: 16px 40px; border-radius: 8px; font-size: 1.1em; font-weight: 700; transition: transform .2s, box-shadow .2s; box-shadow: 0 4px 20px rgba(255,68,68,0.4); }
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 8px 30px rgba(255,68,68,0.5); }
.btn-download::before { content: '⬇ '; }
.btn-secondary { border: 2px solid rgba(255,255,255,0.3); color: #fff; padding: 16px 40px; border-radius: 8px; font-size: 1.1em; font-weight: 700; transition: background .2s, border-color .2s; }
.btn-secondary:hover { background: rgba(255,255,255,0.1); border-color: rgba(255,255,255,0.5); }
.hero-stats { display: flex; gap: 36px; }
.stat { text-align: center; color: rgba(255,255,255,0.6); font-size: 0.9em; }
.stat span { display: block; font-size: 1.8em; font-weight: 800; color: #fff; background: linear-gradient(135deg, #ffd700, #ff8c00); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.hero-image { flex: 0 0 auto; }
.hero-image img { max-width: 520px; height: auto; border-radius: 16px; box-shadow: 0 20px 60px rgba(0,0,0,0.5); }

/* ===== Features ===== */
.features { background: #fff; }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.feature-card { background: #f8f9fa; border-radius: 12px; padding: 36px 28px; transition: transform .2s, box-shadow .2s; border: 1px solid transparent; }
.feature-card:hover { transform: translateY(-4px); box-shadow: 0 12px 30px rgba(0,0,0,0.06); border-color: #e0e8f0; }
.feature-icon { font-size: 2.2em; margin-bottom: 16px; }
.feature-card h3 { font-size: 1.2em; margin-bottom: 10px; color: #1a1a2e; }
.feature-card p { color: #666; font-size: 0.95em; }

/* ===== Wallets ===== */
.wallets { background: #f8f9fa; }
.wallet-list { display: flex; justify-content: center; gap: 20px; flex-wrap: wrap; }
.wallet-item { background: #fff; border: 2px solid #e0e8f0; border-radius: 10px; padding: 18px 36px; font-size: 1.1em; font-weight: 700; color: #1a1a2e; transition: border-color .2s; }
.wallet-item:hover { border-color: #0088cc; }

/* ===== How ===== */
.how { background: #fff; }
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; }
.step { text-align: center; padding: 36px 20px; background: #f8f9fa; border-radius: 16px; transition: transform .2s, box-shadow .2s; }
.step:hover { transform: translateY(-4px); box-shadow: 0 12px 30px rgba(0,0,0,0.08); }
.step-num { font-size: 3em; font-weight: 900; background: linear-gradient(135deg, #0088cc, #00a8e8); -webkit-background-clip: text; -webkit-text-fill-color: transparent; margin-bottom: 16px; }
.step h3 { font-size: 1.2em; margin-bottom: 10px; }
.step p { color: #666; font-size: 0.95em; margin-bottom: 16px; }
.step-btn { display: inline-block; background: #0088cc; color: #fff; padding: 10px 24px; border-radius: 6px; font-size: 0.9em; font-weight: 600; transition: background .2s; }
.step-btn:hover { background: #006699; }

/* ===== Tutorial ===== */
.tutorial { background: linear-gradient(135deg, #f8f9fa 0%, #e8f4fd 100%); }
.tutorial-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.tutorial-card { background: #fff; border-radius: 16px; overflow: hidden; box-shadow: 0 4px 20px rgba(0,0,0,0.06); transition: transform .2s, box-shadow .2s; }
.tutorial-card:hover { transform: translateY(-6px); box-shadow: 0 16px 40px rgba(0,0,0,0.1); }
.tutorial-step { background: linear-gradient(135deg, #0088cc, #00a8e8); color: #fff; padding: 12px 20px; font-weight: 700; font-size: 0.95em; }
.tutorial-card img { width: 100%; height: 240px; object-fit: cover; object-position: top; border-bottom: 1px solid #eee; }
.tutorial-desc { padding: 20px; }
.tutorial-desc h3 { font-size: 1.1em; margin-bottom: 10px; color: #1a1a2e; }
.tutorial-desc p { color: #666; font-size: 0.9em; line-height: 1.7; }

/* ===== FAQ ===== */
.faq { background: #f8f9fa; }
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item { background: #fff; border-radius: 10px; margin-bottom: 12px; overflow: hidden; }
.faq-item summary { padding: 20px 28px; cursor: pointer; font-weight: 700; font-size: 1.05em; color: #1a1a2e; list-style: none; display: flex; justify-content: space-between; align-items: center; }
.faq-item summary::after { content: '+'; font-size: 1.3em; color: #0088cc; }
.faq-item[open] summary::after { content: '−'; }
.faq-item[open] summary { background: #f0f7ff; }
.faq-item p { padding: 0 28px 20px; color: #555; line-height: 1.8; }

/* ===== Blog Preview ===== */
.blog-preview { background: #fff; }
.blog-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-bottom: 40px; }
.blog-card { background: #f8f9fa; border-radius: 12px; padding: 28px; transition: transform .2s; }
.blog-card:hover { transform: translateY(-2px); }
.blog-card-tag { display: inline-block; background: #e8f4fd; color: #0088cc; padding: 3px 12px; border-radius: 12px; font-size: 0.8em; font-weight: 600; margin-bottom: 14px; }
.blog-card h3 { font-size: 1.1em; margin-bottom: 10px; line-height: 1.5; }
.blog-card h3 a { color: #1a1a2e; transition: color .2s; }
.blog-card h3 a:hover { color: #0088cc; }
.blog-card p { color: #666; font-size: 0.9em; margin-bottom: 14px; line-height: 1.6; }
.blog-card time { color: #aaa; font-size: 0.85em; }
.btn-outline { display: block; width: fit-content; margin: 0 auto; border: 2px solid #0088cc; color: #0088cc; padding: 14px 36px; border-radius: 8px; font-weight: 700; font-size: 1.05em; transition: background .2s; }
.btn-outline:hover { background: rgba(0,136,204,0.05); }

/* ===== CTA ===== */
.cta { text-align: center; background: linear-gradient(135deg, #1a1a2e, #0d1526); border-radius: 20px; padding: 72px 20px; max-width: 900px; margin: 80px auto; color: #fff; position: relative; overflow: hidden; }
.cta::before { content: ''; position: absolute; top: -50%; left: -50%; width: 200%; height: 200%; background: radial-gradient(circle, rgba(255,68,68,0.1) 0%, transparent 50%); }
.cta h2 { color: #fff; position: relative; }
.cta > p { font-size: 1.1em; opacity: 0.9; margin-bottom: 28px; position: relative; }
.btn-cta { display: inline-block; background: linear-gradient(135deg, #ff4444, #ff6b35); color: #fff; padding: 18px 52px; border-radius: 8px; font-size: 1.2em; font-weight: 700; transition: transform .2s, box-shadow .2s; box-shadow: 0 4px 20px rgba(255,68,68,0.4); position: relative; }
.btn-cta:hover { transform: translateY(-3px); box-shadow: 0 8px 30px rgba(255,68,68,0.5); }
.cta-note { font-size: 0.9em; opacity: 0.7; margin-top: 20px; position: relative; }
.cta-note a { color: #6ecfff; text-decoration: underline; }
.cta-note a:hover { color: #fff; }

/* ===== Footer ===== */
.footer { background: #1a1a2e; color: #aaa; padding: 60px 20px 30px; }
.footer-inner { max-width: 1200px; margin: 0 auto; display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 40px; }
.footer-col h4 { color: #fff; margin-bottom: 16px; }
.footer-col ul li { margin-bottom: 8px; }
.footer-col ul li a { color: #888; transition: color .2s; }
.footer-col ul li a:hover { color: #fff; }
.footer-bottom { max-width: 1200px; margin: 40px auto 0; padding-top: 20px; border-top: 1px solid #2a2a4e; text-align: center; font-size: 0.9em; }

/* ===== Blog Page ===== */
.blog-page-header { padding: 120px 20px 60px; background: linear-gradient(135deg, #f0f7ff, #e8f4fd); text-align: center; }
.blog-page-header h1 { font-size: 2.5em; }
.blog-page-list { max-width: 800px; margin: 0 auto; padding: 60px 20px; }
.blog-page-item { margin-bottom: 48px; border-bottom: 1px solid #eee; padding-bottom: 48px; }
.blog-page-item:last-child { border: none; }
.blog-page-item h2 { font-size: 1.6em; text-align: left; margin-bottom: 8px; }
.blog-page-item h2 a:hover { color: #0088cc; }
.blog-page-item time { color: #aaa; font-size: 0.9em; }
.blog-page-item p { color: #555; margin-top: 12px; }
.blog-page-item .tag { display: inline-block; background: #e8f4fd; color: #0088cc; padding: 2px 10px; border-radius: 10px; font-size: 0.8em; font-weight: 600; margin-right: 8px; }

/* ===== Article Page ===== */
.article { max-width: 760px; margin: 0 auto; padding: 120px 20px 60px; }
.article h1 { font-size: 2.2em; margin-bottom: 8px; line-height: 1.4; }
.article-meta { color: #999; margin-bottom: 32px; font-size: 0.95em; }
.article-meta time { margin-right: 16px; }
.article h2 { font-size: 1.5em; text-align: left; margin: 48px 0 16px; }
.article h3 { font-size: 1.2em; margin: 32px 0 12px; }
.article p { margin-bottom: 18px; color: #333; line-height: 1.9; }
.article ul, .article ol { margin: 16px 0 24px 24px; }
.article li { margin-bottom: 8px; color: #333; }
.article blockquote { border-left: 4px solid #0088cc; padding: 12px 20px; margin: 24px 0; background: #f0f7ff; border-radius: 0 8px 8px 0; color: #555; }
.article .cta-box { background: #e8f4fd; border-radius: 12px; padding: 32px; text-align: center; margin: 48px 0; }
.article .cta-box h3 { margin: 0 0 12px; }
.article .cta-box .btn { display: inline-block; background: #0088cc; color: #fff; padding: 14px 36px; border-radius: 8px; font-weight: 700; margin-top: 12px; }
.article table { width: 100%; border-collapse: collapse; margin: 24px 0; }
.article th, .article td { border: 1px solid #e0e0e0; padding: 12px 16px; text-align: left; }
.article th { background: #f8f9fa; font-weight: 700; }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .hero-inner { flex-direction: column; text-align: center; }
    .hero-content { max-width: 100%; }
    .hero-buttons { justify-content: center; }
    .hero-stats { justify-content: center; }
    .hero-image img { max-width: 100%; width: 400px; }
    .tutorial-grid { grid-template-columns: 1fr; max-width: 500px; margin: 0 auto; }
}

@media (max-width: 768px) {
    .nav-links { display: none; }
    .hero { padding: 100px 20px 60px; }
    .hero h1 { font-size: 2.2em; }
    .hero-stats { flex-wrap: wrap; gap: 20px; }
    .hero-image img { width: 320px; }
    .feature-grid { grid-template-columns: 1fr; }
    .steps { grid-template-columns: 1fr; }
    .blog-grid { grid-template-columns: 1fr; }
    .footer-inner { grid-template-columns: 1fr; }
    .cta { margin: 40px 20px; padding: 48px 20px; }
    .wallet-list { gap: 10px; }
    .wallet-item { padding: 12px 20px; font-size: 0.95em; }
    .tutorial-card img { height: 200px; }
}

@media (max-width: 480px) {
    .hero h1 { font-size: 1.8em; }
    .hero-buttons { flex-direction: column; }
    .hero-buttons a { text-align: center; }
    .hero-stats { gap: 16px; }
    .stat span { font-size: 1.4em; }
    h2 { font-size: 1.5em; }
    .btn-cta { padding: 16px 32px; font-size: 1.05em; }
}