*{box-sizing:border-box}html,body{margin:0;padding:0}body{font-family:system-ui,-apple-system,PingFang SC,Helvetica Neue,sans-serif;background:#f2f5fa;min-height:100vh;display:flex;align-items:center;justify-content:center;padding:24px}.card{background:#fff;border-radius:16px;padding:36px 32px;width:100%;max-width:360px;text-align:center;box-shadow:0 4px 24px #1e3c7814}.app-icon{width:64px;height:64px;border-radius:14px;object-fit:cover;background:#eef2f8}.app-icon-placeholder{width:64px;height:64px;border-radius:14px;background:#eef2f8;display:flex;align-items:center;justify-content:center;font-size:28px;margin:0 auto}.app-name{font-size:18px;font-weight:600;color:#1a2233;margin:16px 0 6px}.app-desc{font-size:13px;color:#8a94a6;margin:0 0 28px;line-height:1.6;word-break:break-all}.login-btn{display:block;width:100%;padding:13px 0;border:none;border-radius:10px;background:#07c160;color:#fff;font-size:16px;font-weight:500;text-decoration:none;cursor:pointer}.login-btn:active{opacity:.85}.login-btn:disabled{background:#b9c4d4;cursor:not-allowed}.hint{margin-top:18px;font-size:12px;color:#a8b2c2}.error-box{color:#d03050;font-size:14px;line-height:1.7;word-break:break-all}.loading{color:#8a94a6;font-size:14px}.brand{margin-top:26px;font-size:11px;color:#c3cad6}.qr-box{min-height:220px;display:flex;flex-direction:column;align-items:center;justify-content:center;border:1px solid #e6ebf2;border-radius:12px;padding:10px;margin:4px 0 14px}.qr-box svg{width:200px;height:200px;display:block}