:root{--primary-color:#1a73e8;--primary-dark:#1557b0;--secondary-color:#34a853;--accent-color:#fbbc04;--danger-color:#ea4335;--text-primary:#202124;--text-secondary:#5f6368;--text-light:#80868b;--bg-primary:#fff;--bg-secondary:#f8f9fa;--bg-tertiary:#e8f0fe;--border-color:#dadce0;--shadow-sm:0 1px 2px rgba(0,0,0,.1);--shadow-md:0 4px 6px rgba(0,0,0,.1);--shadow-lg:0 10px 25px rgba(0,0,0,.15);--radius-sm:4px;--radius-md:8px;--radius-lg:16px;--max-width:1200px;--transition:all 0.3s ease}*{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Noto Sans TC,Microsoft JhengHei,sans-serif;font-size:16px;line-height:1.7;color:var(--text-primary);background-color:var(--bg-primary)}a{color:var(--primary-color);text-decoration:none;transition:var(--transition)}a:hover{color:var(--primary-dark);text-decoration:underline}h1,h2,h3,h4,h5,h6{font-weight:700;line-height:1.3;margin-bottom:1rem;color:var(--text-primary)}h1{font-size:2.5rem}h2{font-size:2rem}h3{font-size:1.5rem}h4{font-size:1.25rem}p{margin-bottom:1rem;color:var(--text-secondary)}img{max-width:100%;height:auto}.container{max-width:var(--max-width);margin:0 auto;padding:0 1.5rem}.section{padding:4rem 0}.section-title{text-align:center;margin-bottom:3rem}.section-title h2{font-size:2.25rem;margin-bottom:1rem}.section-title p{font-size:1.125rem;max-width:600px;margin:0 auto}.btn{display:inline-block;padding:.875rem 2rem;font-size:1rem;font-weight:600;text-align:center;border:none;border-radius:var(--radius-md);cursor:pointer;transition:var(--transition);text-decoration:none}.btn-primary{background-color:var(--primary-color);color:#fff}.btn-primary:hover{background-color:var(--primary-dark);color:#fff;text-decoration:none;transform:translateY(-2px);box-shadow:var(--shadow-md)}.btn-secondary{background-color:#fff;color:var(--primary-color);border:2px solid var(--primary-color)}.btn-secondary:hover{background-color:var(--bg-tertiary);text-decoration:none}.btn-success{background-color:var(--secondary-color);color:#fff}.btn-success:hover{background-color:#2d9249;color:#fff;text-decoration:none}.card{background:var(--bg-primary);border-radius:var(--radius-lg);padding:2rem;box-shadow:var(--shadow-sm);border:1px solid var(--border-color);transition:var(--transition)}.card:hover{box-shadow:var(--shadow-md);transform:translateY(-4px)}.grid{display:grid;grid-gap:2rem;gap:2rem}.grid-2{grid-template-columns:repeat(2,1fr)}.grid-3{grid-template-columns:repeat(3,1fr)}.grid-4{grid-template-columns:repeat(4,1fr)}@media (max-width:992px){.grid-3,.grid-4{grid-template-columns:repeat(2,1fr)}}@media (max-width:768px){h1{font-size:2rem}h2{font-size:1.75rem}.section{padding:3rem 0}.grid-2,.grid-3,.grid-4{grid-template-columns:1fr}}.input-group{margin-bottom:1.5rem}.input-group label{display:block;margin-bottom:.5rem;font-weight:600;color:var(--text-primary)}.input-group input,.input-group select,.input-group textarea{width:100%;padding:.875rem 1rem;font-size:1rem;border:2px solid var(--border-color);border-radius:var(--radius-md);transition:var(--transition);font-family:inherit}.input-group input:focus,.input-group select:focus,.input-group textarea:focus{outline:none;border-color:var(--primary-color);box-shadow:0 0 0 3px rgba(26,115,232,.1)}.input-group textarea{min-height:150px;resize:vertical}.tag{display:inline-block;padding:.25rem .75rem;font-size:.875rem;background-color:var(--bg-tertiary);color:var(--primary-color);border-radius:20px;margin-right:.5rem;margin-bottom:.5rem}.highlight{background:linear-gradient(135deg,var(--bg-tertiary) 0,#e8f5e9 100%);border-radius:var(--radius-lg);padding:2rem}.text-center{text-align:center}.text-left{text-align:left}.text-right{text-align:right}.mt-1{margin-top:.5rem}.mt-2{margin-top:1rem}.mt-3{margin-top:1.5rem}.mt-4{margin-top:2rem}.mb-1{margin-bottom:.5rem}.mb-2{margin-bottom:1rem}.mb-3{margin-bottom:1.5rem}.mb-4{margin-bottom:2rem}.visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);border:0}@keyframes fadeIn{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.animate-fade-in{animation:fadeIn .6s ease forwards}