:root{--primary:#f05a1a;--red:#e60012;--dark:#1f2933;--text:#1f2933;--muted:#66717e;--bg:#f7f7f4;--card:#fff;--border:#ead8cc;font-family:Microsoft YaHei,PingFang SC,Source Han Sans SC,Arial,sans-serif;color:var(--text);background:#e8e8e8;font-synthesis:none}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;min-width:320px}a{color:inherit;text-decoration:none}button,input,textarea,select{font:inherit}.app-shell{max-width:520px;margin:auto;background:#fff;min-height:100vh;overflow:hidden}main{min-height:70vh}.mobile-header{height:70px;padding:10px 18px;display:flex;align-items:center;justify-content:space-between;background:#fff;border-bottom:1px solid #eee;position:sticky;top:0;z-index:30}.logo-link img{display:block;width:auto;height:40px;max-width:250px;object-fit:contain}.menu-toggle{width:44px;height:44px;border:1px solid #e8e8e8;border-radius:6px;background:#fff;display:grid;place-content:center;gap:5px}.menu-toggle i{width:22px;height:2px;background:#343b43}.mobile-menu{position:fixed;z-index:29;top:70px;right:0;bottom:0;left:0;background:#fff;overflow:auto;padding:20px max(20px,calc((100vw - 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