.app-container{min-height:100vh;padding:2rem;max-width:800px;margin:0 auto;font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Open Sans,Helvetica Neue,sans-serif}.language-switcher{position:relative;display:flex;justify-content:flex-end;margin-bottom:2rem}.language-icon{width:40px;height:40px;cursor:pointer;color:#4b5563;display:flex;align-items:center;justify-content:center;background-color:#fff;border:1px solid #e5e7eb;border-radius:50%;transition:all .2s ease;box-shadow:0 1px 3px #0000001a}.language-icon svg{width:20px;height:20px}.language-icon:hover{color:#2563eb;border-color:#646cff;transform:translateY(-1px);box-shadow:0 4px 6px #0000001a}.language-dropdown{position:absolute;top:50px;right:0;background-color:#fff;border:1px solid #e5e7eb;border-radius:12px;box-shadow:0 10px 15px -3px #0000001a,0 4px 6px -2px #0000000d;min-width:160px;z-index:1000;overflow:hidden;animation:fadeIn .2s ease-out}@keyframes fadeIn{0%{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}.language-option{padding:.75rem 1.25rem;cursor:pointer;transition:background-color .2s;color:#374151}.language-option:hover{background-color:#f3f4f6}.language-option.active{background-color:#eff6ff;color:#2563eb;font-weight:500}.page-header{text-align:center;margin-bottom:3rem;animation:slideDown .5s ease-out}@keyframes slideDown{0%{opacity:0;transform:translateY(-20px)}to{opacity:1;transform:translateY(0)}}.page-header h1{font-size:3rem;font-weight:800;background:linear-gradient(135deg,#2563eb,#7c3aed);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;margin-bottom:1rem;line-height:1.2}.page-header .subtitle{font-size:1.25rem;color:#6b7280;margin:0 0 1.5rem;line-height:1.6}.platform-badge{display:inline-block;background-color:#eff6ff;color:#2563eb;padding:.5rem 1rem;border-radius:9999px;font-size:.95rem;font-weight:600;border:1px solid #bfdbfe}.download-content{display:flex;justify-content:center;animation:scaleIn .5s ease-out .2s both}@keyframes scaleIn{0%{opacity:0;transform:scale(.95)}to{opacity:1;transform:scale(1)}}.download-card.single-card{background:#fff;border-radius:24px;box-shadow:0 20px 25px -5px #0000001a,0 10px 10px -5px #0000000a;width:100%;max-width:500px;overflow:hidden;border:1px solid #f3f4f6}.card-body{padding:2.5rem;text-align:center}.package-details{display:flex;justify-content:center;gap:3rem;margin-bottom:2rem;padding-bottom:1.5rem;border-bottom:1px solid #f3f4f6}.detail-row{display:flex;flex-direction:column;gap:.5rem}.detail-label{font-size:.875rem;color:#9ca3af;text-transform:uppercase;letter-spacing:.05em;font-weight:600}.detail-value{font-size:1.5rem;color:#111827;font-weight:700}.package-description{color:#4b5563;font-size:1.1rem;line-height:1.6;margin-bottom:2.5rem}.download-button{width:100%;padding:1.25rem;font-size:1.25rem;font-weight:600;color:#fff;background:linear-gradient(135deg,#2563eb,#4f46e5);border:none;border-radius:16px;cursor:pointer;transition:all .3s ease;box-shadow:0 4px 6px -1px #2563eb33,0 2px 4px -1px #2563eb1a}.download-button:hover{transform:translateY(-2px);box-shadow:0 10px 15px -3px #2563eb4d,0 4px 6px -2px #2563eb26;filter:brightness(1.05)}.download-button:active{transform:translateY(1px)}.system-requirement-hint{margin-top:1.5rem;font-size:.9rem;color:#dc2626;font-weight:500;display:flex;align-items:center;justify-content:center;gap:.5rem;padding:.75rem;background-color:#fef2f2;border-radius:12px}@media (max-width: 768px){.app-container{padding:1.5rem}.page-header h1{font-size:2.25rem}.card-body{padding:2rem 1.5rem}.package-details{gap:1.5rem}}@media (max-width: 480px){.app-container{padding:1rem}.page-header{margin-bottom:2rem}.page-header h1{font-size:1.875rem}.page-header .subtitle{font-size:1rem}.card-body{padding:1.5rem 1.25rem}.detail-value{font-size:1.25rem}.download-button{padding:1rem;font-size:1.125rem}}:root{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,Microsoft YaHei,微软雅黑,STHeiti,SimHei,sans-serif;line-height:1.6;font-weight:400;color:#213547;background-color:#f5f7fa;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}*{box-sizing:border-box}body{margin:0;padding:0;min-width:320px;min-height:100vh}h1,h2,h3,h4,h5,h6{margin:0;font-weight:600}button{font-family:inherit;cursor:pointer;border:none;outline:none}button:focus-visible{outline:2px solid #646cff;outline-offset:2px}select{font-family:inherit}@media (max-width: 768px){:root{font-size:14px}}