:root{--blue:#1559ed;--ink:#151a26;--muted:#667085;--line:#e6e8ee;--paper:#f6f7fa;--font:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);font-family:var(--font);font-size:16px;line-height:1.65;background:#fff}button,input,select,textarea{font:inherit}button,a,input,select,summary{ -webkit-tap-highlight-color:transparent}button,a{touch-action:manipulation}button{cursor:pointer}a{color:inherit;text-decoration:none}button:disabled{cursor:wait;opacity:.6}[hidden]{display:none!important}a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid #80adff;outline-offset:5px}.header{max-width:1280px;margin:auto;height:104px;display:flex;align-items:center;gap:64px;padding:0 48px;border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:12px;font-size:22px;font-weight:750;line-height:1.15}.brand-mark{width:40px;height:40px;border-radius:12px;background:var(--blue);color:white;display:flex;align-items:center;justify-content:center;font-size:33px;font-weight:700;font-family:Arial,sans-serif;position:relative}.brand-mark span{position:absolute;bottom:10px;right:7px;width:5px;height:5px;border-radius:50%;background:#b9d5ff}.brand-en{display:block;font-size:10px;letter-spacing:2px;font-weight:600;margin-top:5px;color:#596270}.header nav{display:flex;gap:30px;font-size:14px;align-items:center}.nav-button{border:0;background:none;color:var(--muted);padding:0}.active{color:var(--blue);font-weight:600}.header-note{margin-left:auto;color:var(--muted);font-size:13px}main{max-width:1184px;margin:0 auto;padding:0 0}.intro{display:grid;grid-template-columns:1fr 360px;align-items:center;gap:72px;padding:65px 0 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