:root{--color-primary: #1677FF;--color-primary-hover: #4096FF;--color-primary-light: #E6F4FF;--color-text-primary: #263238;--color-text-secondary: #546E7A;--color-text-tertiary: #747478;--color-bg: #F2F2F7;--color-surface: #FFFFFF;--color-surface-secondary: #F8F9FA;--color-border: #E0E0E0;--color-border-light: #F0F0F0;--color-node-port: #FA8C16;--color-node-measure: #1677FF;--color-node-loading: #52C41A;--shadow-sm: 0 2px 8px rgba(0, 0, 0, .06);--shadow-md: 0 4px 12px rgba(0, 0, 0, .05);--shadow-lg: 0 16px 48px rgba(0, 0, 0, .1);--shadow-xl: 0 24px 48px rgba(0, 0, 0, .15);--radius-xs: 4px;--radius-sm: 8px;--radius-md: 12px;--radius-lg: 16px;--max-width: 1200px;--navbar-height: 64px;--font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif}*,*:before,*:after{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth}html,body{width:100%;min-height:100%;font-family:var(--font-family);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;color:var(--color-text-primary);background:var(--color-surface)}#app{width:100%;min-height:100vh}a{text-decoration:none;color:inherit}img{max-width:100%}button{font-family:inherit}ul,ol{list-style:none}.container{max-width:var(--max-width);margin:0 auto;padding:0 24px}.section{padding:80px 0;position:relative}.section-header{text-align:center;margin-bottom:56px}.section-title{font-size:2rem;font-weight:600;color:var(--color-text-primary);margin-bottom:12px}.section-desc{font-size:1.1rem;color:var(--color-text-secondary)}.btn{display:inline-flex;align-items:center;justify-content:center;padding:10px 24px;border-radius:var(--radius-sm);font-weight:500;font-size:16px;cursor:pointer;transition:all .2s ease;border:1px solid transparent}.btn.large{padding:14px 32px;border-radius:var(--radius-md)}.btn-primary{background:var(--color-primary);color:#fff}.btn-primary:hover{background:var(--color-primary-hover)}.btn-secondary{background:var(--color-surface);color:var(--color-text-primary);border-color:#d9d9d9}.btn-secondary:hover{color:var(--color-primary);border-color:var(--color-primary)}mark{background:var(--color-primary-light);color:var(--color-primary);padding:2px 8px;border-radius:var(--radius-xs);font-size:.85em;font-weight:500;margin-right:8px}.animate-on-scroll{opacity:0;transform:translateY(20px);transition:opacity .6s ease-out,transform .6s ease-out}.animate-in{opacity:1;transform:translateY(0)}@media (max-width: 768px){.section{padding:48px 0}.section-title{font-size:1.5rem}}