:root{--site-max-width: 1200px;--site-page-padding: 24px;--brand-color: #0052D9;--brand-color-hover: #003CAB;--brand-gradient: linear-gradient(135deg, #0052D9 0%, #5e6ef7 100%);--brand-gradient-light: linear-gradient(135deg, #E8F3FF 0%, #F2F5FF 100%);--text-primary: rgba(0, 0, 0, .9);--text-secondary: rgba(0, 0, 0, .6);--text-tertiary: rgba(0, 0, 0, .4)}html{scroll-behavior:smooth}html,body{height:100%}body{margin:0;color:var(--text-primary);background:#fff;font-family:PingFang SC,Microsoft YaHei,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}*{box-sizing:border-box}a{text-decoration:none;color:inherit}.site-container{max-width:var(--site-max-width);margin:0 auto;padding:0 var(--site-page-padding)}.text-gradient{background:var(--brand-gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.section-title{font-size:32px;font-weight:700;text-align:center;margin-bottom:16px;line-height:1.4}.section-desc{font-size:16px;color:var(--text-secondary);text-align:center;max-width:600px;margin:0 auto 48px;line-height:1.6}