:root{--primary-color: #1890ff;--primary-hover: #40a9ff;--text-color: #333;--text-secondary: #666;--text-light: #999;--bg-color: #fff;--bg-secondary: #f8f9fa;--border-color: #e9ecef;--shadow: 0 2px 10px rgba(0, 0, 0, .1);--shadow-hover: 0 4px 20px rgba(0, 0, 0, .15);--border-radius: 8px;--transition: all .3s ease}html{scroll-behavior:smooth;font-size:16px}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;line-height:1.6;color:var(--text-color);background-color:var(--bg-color);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}a{color:var(--primary-color);text-decoration:none;transition:var(--transition)}a:hover{color:var(--primary-hover)}h1,h2,h3,h4,h5,h6{font-weight:600;line-height:1.2;margin-bottom:.5em}h1{font-size:2.5rem}h2{font-size:2rem}h3{font-size:1.5rem}h4{font-size:1.25rem}p{margin-bottom:1em;line-height:1.6}button{font-family:inherit;font-size:1rem;border:none;border-radius:var(--border-radius);cursor:pointer;transition:var(--transition);outline:none}button:focus{box-shadow:0 0 0 2px #1890ff33}input,select,textarea{font-family:inherit;font-size:1rem;border:1px solid var(--border-color);border-radius:var(--border-radius);transition:var(--transition)}input:focus,select:focus,textarea:focus{outline:none;border-color:var(--primary-color);box-shadow:0 0 0 2px #1890ff33}ul,ol{margin-bottom:1em}li{margin-bottom:.5em}img{max-width:100%;height:auto;display:block}.container{max-width:1200px;margin:0 auto;padding:0 15px}.text-center{text-align:center}.text-left{text-align:left}.text-right{text-align:right}.mb-0{margin-bottom:0}.mb-1{margin-bottom:.5rem}.mb-2{margin-bottom:1rem}.mb-3{margin-bottom:1.5rem}.mb-4{margin-bottom:2rem}.mt-0{margin-top:0}.mt-1{margin-top:.5rem}.mt-2{margin-top:1rem}.mt-3{margin-top:1.5rem}.mt-4{margin-top:2rem}@media (max-width: 1200px){.container{max-width:960px}}@media (max-width: 992px){.container{max-width:720px}}@media (max-width: 768px){.container{max-width:540px}h1{font-size:2rem}h2{font-size:1.75rem}h3{font-size:1.25rem}}@media (max-width: 576px){.container{max-width:100%;padding:0 10px}h1{font-size:1.75rem}h2{font-size:1.5rem}}::-webkit-scrollbar{width:8px}::-webkit-scrollbar-track{background:#f1f1f1}::-webkit-scrollbar-thumb{background:#c1c1c1;border-radius:4px}::-webkit-scrollbar-thumb:hover{background:#a8a8a8}::selection{background-color:#1890ff33;color:var(--text-color)}@keyframes fadeIn{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.fade-in{animation:fadeIn .6s ease-out}#app{min-height:100vh;display:flex;flex-direction:column}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;line-height:1.6;color:#333}html{scroll-behavior:smooth}#app{min-height:100vh}