:root{--primary:#3b82f6;--primary-light:#dbeafe;--primary-dark:#1d4ed8;--secondary:#8b5cf6;--accent:#06b6d4;--light:#f0f9ff;--lighter:#f8fafc;--dark:#1e293b;--success:#10b981;--warning:#f59e0b;--border:#cbd5e1;--card-bg:#fff;--terminal-bg:#0f172a;--transition:all .3s cubic-bezier(0.25,0.8,0.25,1);--transition-fast:all .2s cubic-bezier(0.25,0.8,0.25,1);--transition-slow:all .4s cubic-bezier(0.25,0.8,0.25,1)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen,Ubuntu,sans-serif;line-height:1.6;color:var(--dark);background-color:#fff;overflow-x:hidden}.container{width:90%;max-width:1200px;margin:0 auto;padding:0 20px}@keyframes fadeIn{from{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@keyframes slideInUp{from{opacity:0;transform:translateY(50px)}to{opacity:1;transform:translateY(0)}}@keyframes slideInLeft{from{opacity:0;transform:translateX(-50px)}to{opacity:1;transform:translateX(0)}}@keyframes slideInRight{from{opacity:0;transform:translateX(50px)}to{opacity:1;transform:translateX(0)}}@keyframes float{0%{transform:translateY(0)}50%{transform:translateY(-10px)}100%{transform:translateY(0)}}header{text-align:center;padding:2.5rem 0;background:linear-gradient(135deg,var(--light),#e0f2fe);border-bottom:1px solid var(--border);position:relative;animation:fadeIn .8s cubic-bezier(0.25,0.8,0.25,1)}.language-switch-container{position:absolute;top:20px;right:20px;animation:slideInRight .6s cubic-bezier(0.25,0.8,0.25,1)}.language-switch{background:#fff;border:1.5px solid #e0e0e0;border-radius:999px;padding:.4rem 1rem;font-size:.9rem;cursor:pointer;box-shadow:0 1px 4px rgba(60,60,60,0.06);transition:var(--transition);color:#444;position:relative;animation:fadeIn 1s cubic-bezier(0.25,0.8,0.25,1)}.language-switch:hover{background:#f5f5f5;border-color:#bdbdbd;transform:translateY(-2px);box-shadow:0 4px 8px rgba(60,60,60,0.1)}.lang-en-label,.lang-zh-label{display:block}h1{font-size:2.3rem;font-weight:800;margin-bottom:.8rem;color:var(--primary-dark);animation:fadeIn 1s cubic-bezier(0.25,0.8,0.25,1)}.subtitle{font-size:1.1rem;color:var(--dark);max-width:600px;margin:0 auto;font-weight:400;animation:fadeIn 1.2s cubic-bezier(0.25,0.8,0.25,1)}.section-title{text-align:center;font-size:1.7rem;font-weight:700;margin:2.5rem 0 1.5rem;color:var(--dark);opacity:0;transform:translateY(30px);transition:opacity .6s cubic-bezier(0.25,0.8,0.25,1),transform .6s cubic-bezier(0.25,0.8,0.25,1)}.section-title.animate{opacity:1;transform:translateY(0)}.features{display:grid;grid-template-columns:repeat(4,1fr);gap:1.2rem;margin-bottom:2.5rem}.feature-card{background:var(--card-bg);border:1px solid var(--border);border-radius:10px;padding:1.5rem;transition:var(--transition);box-shadow:0 4px 6px rgba(0,0,0,0.05);opacity:0;transform:translateY(30px);transition:opacity .6s cubic-bezier(0.25,0.8,0.25,1),transform .6s cubic-bezier(0.25,0.8,0.25,1),box-shadow .3s cubic-bezier(0.25,0.8,0.25,1),transform .3s cubic-bezier(0.25,0.8,0.25,1),border-color .3s cubic-bezier(0.25,0.8,0.25,1)}.feature-card.animate{opacity:1;transform:translateY(0)}.feature-card:nth-child(1){transition-delay:.1s}.feature-card:nth-child(2){transition-delay:.2s}.feature-card:nth-child(3){transition-delay:.3s}.feature-card:nth-child(4){transition-delay:.4s}.feature-card:hover{transform:translateY(-5px);box-shadow:0 10px 25px rgba(0,0,0,0.15);border-color:var(--primary)}.feature-icon{width:50px;height:50px;background:linear-gradient(135deg,var(--primary-light),#bfdbfe);border-radius:10px;display:flex;align-items:center;justify-content:center;margin-bottom:1rem;color:var(--primary);font-size:1.3rem;transition:transform .3s cubic-bezier(0.25,0.8,0.25,1)}.feature-card:hover .feature-icon{transform:scale(1.15)}.feature-card h3{font-size:1.2rem;font-weight:700;margin-bottom:.6rem;color:var(--dark)}.feature-card p{color:#64748b;font-size:.95rem;line-height:1.5}.terminal{background-color:var(--terminal-bg);color:#e2e8f0;border-radius:10px;padding:1.5rem;margin:1.5rem 0 1.2rem;font-family:'Monaco','Menlo','Ubuntu Mono',monospace;font-size:.9rem;box-shadow:0 10px 25px rgba(0,0,0,0.2);opacity:0;transform:translateY(30px);transition:opacity .6s cubic-bezier(0.25,0.8,0.25,1),transform .6s cubic-bezier(0.25,0.8,0.25,1)}.terminal.animate{opacity:1;transform:translateY(0)}.terminal-header{display:flex;align-items:center;margin-bottom:1rem;padding-bottom:.7rem;border-bottom:1px solid rgba(255,255,255,0.1)}.terminal-dots{display:flex;gap:.35rem}.terminal-dot{width:11px;height:11px;border-radius:50%}.dot-red{background-color:#ff5f56}.dot-yellow{background-color:#ffbd2e}.dot-green{background-color:#27c93f}.terminal-title{flex-grow:1;text-align:center;font-size:.8rem;color:rgba(255,255,255,0.7)}.terminal-body .command{color:#93c5fd;margin:.7rem 0;font-weight:600;padding:.3rem 0;opacity:0;transform:translateX(-10px);transition:opacity .4s cubic-bezier(0.25,0.8,0.25,1),transform .4s cubic-bezier(0.25,0.8,0.25,1)}
.terminal-body .command.animate{opacity:1;transform:translateX(0)}.terminal-body .output{color:#94a3b8;margin:.5rem 0;padding:.2rem 0;opacity:0;transition:opacity .4s cubic-bezier(0.25,0.8,0.25,1)}.terminal-body .output.animate{opacity:1}.terminal-body .info{color:var(--accent);margin:.5rem 0;padding:.2rem 0;opacity:0;transition:opacity .4s cubic-bezier(0.25,0.8,0.25,1)}.terminal-body .info.animate{opacity:1}.terminal-body .success{color:var(--success);margin:.5rem 0;padding:.2rem 0;opacity:0;transition:opacity .4s cubic-bezier(0.25,0.8,0.25,1)}.terminal-body .success.animate{opacity:1}.cta-section{text-align:center;margin:1.2rem 0 2.5rem;opacity:0;transform:translateY(30px);transition:opacity .6s cubic-bezier(0.25,0.8,0.25,1),transform .6s cubic-bezier(0.25,0.8,0.25,1)}.cta-section.animate{opacity:1;transform:translateY(0)}.app-btn.github{background:#fff;color:#444;border:1.5px solid #e0e0e0;box-shadow:0 1px 4px rgba(60,60,60,0.06);display:inline-flex;align-items:center;justify-content:center;padding:.9rem 2.2rem;border-radius:999px;text-decoration:none;font-weight:600;transition:var(--transition);cursor:pointer;font-size:1rem;opacity:0;transform:translateY(20px);transition:opacity .6s cubic-bezier(0.25,0.8,0.25,1),transform .6s cubic-bezier(0.25,0.8,0.25,1),background .3s cubic-bezier(0.25,0.8,0.25,1),color .3s cubic-bezier(0.25,0.8,0.25,1),border-color .3s cubic-bezier(0.25,0.8,0.25,1),transform .3s cubic-bezier(0.25,0.8,0.25,1),box-shadow .3s cubic-bezier(0.25,0.8,0.25,1)}.app-btn.github.animate{opacity:1;transform:translateY(0)}.app-btn.github:hover,.app-btn.github:focus{background:#f5f5f5;color:#111;border-color:#bdbdbd;transform:translateY(-3px) scale(1.03);box-shadow:0 8px 20px rgba(60,60,60,0.15)}.app-btn .github-icon{width:1.15em;height:1.15em;margin-right:.45em;vertical-align:middle;display:inline-block;filter:grayscale(1) brightness(0.2);background:0;transition:transform .3s cubic-bezier(0.25,0.8,0.25,1)}.app-btn.github:hover .github-icon{transform:scale(1.2)}footer{text-align:center;padding:1.5rem 0;color:#64748b;font-size:.9rem;border-top:1px solid var(--border);opacity:0;transform:translateY(30px);transition:opacity .6s cubic-bezier(0.25,0.8,0.25,1),transform .6s cubic-bezier(0.25,0.8,0.25,1)}footer.animate{opacity:1;transform:translateY(0)}footer a{color:var(--primary);text-decoration:none}footer a:hover{text-decoration:underline}.lang-zh{display:none}@media(max-width:1200px){.container{max-width:1000px}.features{grid-template-columns:repeat(4,1fr)}}@media(max-width:992px){.features{grid-template-columns:repeat(2,1fr);gap:1.2rem}}@media(max-width:768px){.container{width:95%}h1{font-size:2rem}.subtitle{font-size:1rem}.features{grid-template-columns:repeat(2,1fr);gap:1rem}.section-title{font-size:1.5rem}.language-switch-container{top:15px;right:15px}.language-switch{padding:.3rem .8rem;font-size:.8rem}}@media(max-width:576px){.features{grid-template-columns:1fr}header{padding:2rem 0}}