:root{--bg:#f4f5f7;--surface:#fff;--surface-soft:#f9fafb;--text:#20242a;--muted:#68717d;--line:#dfe3e8;--strong-line:#c8ced6;--accent:#d72631;--accent-dark:#a90f1b;--blue:#1c64b7;--green:#147d64;--shadow:0 10px 28px #17212b14;color:var(--text);background:var(--bg);font-family:Inter,Segoe UI,PingFang SC,Hiragino Sans GB,Microsoft YaHei,Arial,sans-serif}*{box-sizing:border-box}body{background:linear-gradient(180deg, #fff 0, #fff 162px, var(--bg) 162px), var(--bg);min-width:320px;margin:0}button,input{font:inherit}button{cursor:pointer}img{max-width:100%;display:block}.site-shell{min-height:100vh}.container{width:min(1220px,100% - 32px);margin:0 auto}.utility-bar{color:#cfd5dc;background:#252b33;font-size:13px}.utility-inner{justify-content:flex-end;align-items:center;gap:16px;min-height:34px;display:flex}.user-chip,.login-button{color:#d8dde4;align-items:center;gap:6px;font-size:13px;line-height:1;display:inline-flex}.login-button{background:#ffffff0f;border:1px solid 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