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1rem;--spacing-md: 1.5rem;--spacing-lg: 2rem;--spacing-xl: 3rem;--spacing-2xl: 5rem;--shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, .05);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .1);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .1);--shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, .1);--transition: all .3s cubic-bezier(.4, 0, .2, 1)}html{scroll-behavior:smooth}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Hiragino Sans GB,Microsoft YaHei,Helvetica Neue,Helvetica,Arial,sans-serif;font-size:16px;line-height:1.6;color:var(--text-primary);background-color:var(--bg-white);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}.container{max-width:1280px;margin:0 auto;padding:0 var(--spacing-md)}img{max-width:100%;height:auto;display:block}a{text-decoration:none;color:inherit;transition:var(--transition)}ul{list-style:none}.btn{display:inline-block;padding:.875rem 2rem;font-size:1rem;font-weight:500;text-align:center;border-radius:8px;cursor:pointer;transition:var(--transition);border:none;outline:none}.btn-primary{background:linear-gradient(135deg,var(--primary-color) 0%,var(--primary-light) 100%);color:#fff;box-shadow:0 4px 14px #2563eb4d}.btn-primary:hover{transform:translateY(-2px);box-shadow:0 6px 20px #2563eb66}.btn-secondary{background:#fff;color:var(--primary-color);border:2px solid var(--primary-color)}.btn-secondary:hover{background:var(--primary-color);color:#fff}section{padding:var(--spacing-2xl) 0}.section-title{font-size:2.25rem;font-weight:700;text-align:center;margin-bottom:var(--spacing-sm);color:var(--text-primary)}.section-subtitle{font-size:1.125rem;text-align:center;color:var(--text-secondary);margin-bottom:var(--spacing-xl)}.tab-wrapper{margin-bottom:var(--spacing-xl)}.tab-container{display:flex;justify-content:center;gap:var(--spacing-md);border-bottom:2px solid var(--border-color);padding-bottom:var(--spacing-sm)}.tab-btn{padding:var(--spacing-sm) var(--spacing-xl);font-size:1rem;font-weight:500;color:var(--text-secondary);background:transparent;border:none;cursor:pointer;transition:var(--transition);position:relative}.tab-btn:after{content:"";position:absolute;bottom:calc(var(--spacing-sm) * -1 - 2px);left:0;width:100%;height:3px;background:var(--primary-color);transform:scaleX(0);transition:var(--transition)}.tab-btn:hover{color:var(--primary-color)}.tab-btn.active{color:var(--primary-color);font-weight:600}.tab-btn.active:after{transform:scaleX(1)}.tab-content{position:relative}.tab-pane{display:none;animation:fadeIn .4s ease-in-out}.tab-pane.active{display:block}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@keyframes fadeInUp{0%{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}@media(max-width:1024px){.container{padding:0 var(--spacing-sm)}.section-title{font-size:1.875rem}}@media(max-width:768px){.container{padding:0 var(--spacing-xs)}section{padding:var(--spacing-xl) 0}.section-title{font-size:1.5rem}.section-subtitle{font-size:1rem}}