:root{--brand:#5b5ff0;--brand-strong:#4f55ec;--brand-soft:#eef0ff;--border:#e8ebf4;--composer-content-width:820px;--composer-panel-height:183px;--composer-divider-offset:10px;--composer-scroll-reserve:calc(var(--composer-panel-height) + var(--composer-divider-offset));--composer-divider-gap:44px;--ink:#12131a;--muted:#7a8191;--surface:#fff;--surface-soft:#f7f8fc;background:#fff;color:var(--ink);font-family:Source Han Sans SC,Source Han Sans CN,Noto Sans CJK SC,PingFang SC,Microsoft YaHei,sans-serif;font-size:14px;font-weight:400;line-height:1.5;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}*{box-sizing:border-box}body{background:#fff;font-size:14px;margin:0;min-height:100vh;min-width:0}button,input,textarea{font:inherit}button{cursor:pointer}button:disabled,input:disabled,textarea:disabled{cursor:not-allowed;opacity:.62}.app-frame{background:#fff;display:grid;grid-template-rows:56px minmax(0,1fr);height:100vh;overflow:hidden}.top-bar{align-items:center;background:#fff;box-shadow:0 2px 10px #0f172a12;display:flex;height:56px;justify-content:space-between;padding:0 14px;position:relative;z-index:10}.app-brand{align-items:center;background:transparent;display:inline-flex;gap:7px;height:55px}.app-logo{background:#fff url(../image-assets/logo.svg) 0/auto 30px no-repeat;border-radius:5px;display:block;height:30px;width:30px}.app-brand strong{align-items:center;background:transparent;color:#0f0f0f;display:flex;font-size:20px;font-weight:700;height:24px;line-height:24px;overflow:hidden;white-space:nowrap;width:112px}.login-button{background:var(--brand);border:0;border-radius:7px;box-shadow:0 8px 18px #5b5ff038;color:#fff;font-weight:700;height:34px;min-width:64px}.login-button:focus-visible,.login-button:hover{background:var(--brand-strong);outline:0}.account-area{align-items:center;color:#111;display:inline-flex;gap:14px;min-width:0;position:relative}.account-balance{color:#687385;font-size:14px;white-space:nowrap}.account-balance strong{color:#101828;font-weight:800;margin-left:4px}.recharge-button{background:#575ce9;border:1px solid #575ce9;border-radius:8px;box-shadow:none;color:#fff;font-weight:700;height:32px;min-width:54px;padding:0 16px}.recharge-button:hover{background:#575ce9;border-color:#575ce9}.account-trigger:hover{background:#f8fafc}.account-menu-wrap{position:relative}.account-trigger{align-items:center;background:transparent;border:0;color:#111;display:inline-flex;font-weight:700;gap:8px;max-width:180px;min-height:36px;padding:0}.account-avatar{border-radius:50%;display:grid;flex:0 0 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