.app-header{position:sticky;top:0;z-index:var(--z-nav);pointer-events:none}.app-header-surface{position:relative;display:grid;grid-template-columns:minmax(150px,1fr) auto minmax(220px,1fr);align-items:center;gap:24px;margin-inline:auto;padding:12px max(32px,calc((100vw - 1344px) / 2));pointer-events:auto}.app-header-brand{display:flex;align-items:center;gap:16px;min-width:0}.app-header-brand>a{display:flex;min-height:44px;align-items:center}.app-header-navigation{display:flex;align-items:center;gap:24px}.app-header-link{position:relative;display:inline-flex;min-height:44px;align-items:center;padding:0 3px;font-size:14px;color:rgb(var(--c-muted));transition:color .18s}.app-header-link.is-active,.app-header-link:hover{color:rgb(var(--c-content))}.app-header-link.is-active{font-weight:600}.app-header-link.is-active:after{content:"";position:absolute;width:16px;height:2px;background:currentColor;border-radius:2px;bottom:2px;left:calc(50% - 8px)}.app-header-tools{display:flex;align-items:center;justify-self:end}.app-header-context{min-width:0;max-width:420px;text-align:center}.app-header--viewing .app-header-surface{grid-template-columns:auto minmax(0,1fr) auto}.app-header-search{position:absolute;top:calc(100% + 10px);right:max(32px,calc((100vw - 1344px) / 2));width:min(440px,calc(100% - 32px));padding:16px}.app-header-search-close{position:absolute;top:16px;right:16px}@media (max-width:767px){.app-header-surface{grid-template-columns:1fr auto;gap:0 10px;padding:10px 16px 2px}.app-header-brand{gap:4px}.app-header-navigation{grid-column:1/-1;grid-row:2;justify-content:center;gap:32px}.app-header-tools{grid-column:2;grid-row:1}.app-header-link{min-height:44px}.app-header-search{width:calc(100% - 24px);right:12px}.app-header-context{grid-row:2;grid-column:1/-1;max-width:none;text-align:left;padding:8px 4px 10px}.app-header--viewing .app-header-surface{grid-template-columns:1fr auto}.app-header--viewing .app-header-tools>button:first-child,.app-header--viewing .app-header-tools>button[aria-label="下载管理"],.app-header--viewing .app-header-tools>button[aria-label="观看历史"]{display:none}}@media (max-width:374px){.app-header-surface{padding-inline:12px;gap:0 2px}.app-header-tools{grid-row:2;grid-column:1/-1;justify-self:center}.app-header-navigation{grid-row:3}.app-header--viewing .app-header-tools{grid-row:1;grid-column:2;justify-self:end}}