:root{--ink: #2e2348;--muted: #6f6386;--cream: #fff7d9;--pink: #ff6f91;--yellow: #ffd447;--blue: #42b7ff;--green: #20c997;--white: #ffffff;--shadow: 0 16px 32px rgba(67, 42, 105, .18)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);font-family:PingFang SC,Microsoft YaHei,Arial,sans-serif;background:var(--cream)}a{color:inherit;text-decoration:none}img{display:block;width:100%}.site-header{position:absolute;top:0;right:0;left:0;z-index:10;display:flex;align-items:center;justify-content:space-between;gap:18px;padding:14px clamp(16px,5vw,56px);transition:background .16s ease}.brand{display:inline-flex;align-items:center;gap:9px;font-weight:900;color:var(--white);text-shadow:0 2px 8px rgba(46,35,72,.28)}.brand-mark{display:grid;place-items:center;width:42px;height:42px;border:3px solid var(--white);border-radius:50%;background:var(--pink);color:var(--white);font-size:15px;box-shadow:0 6px 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