.site-header{position:sticky;top:0;z-index:var(--z-header);background:rgba(255,255,255,.92);backdrop-filter:saturate(1.2)blur(10px);-webkit-backdrop-filter:saturate(1.2)blur(10px);border-bottom:1px solid var(--c-border)}.site-header__inner{max-width:1440px;margin:0 auto;padding:14px 32px;display:flex;align-items:center;gap:24px}.site-header__logo{flex:none;min-width:180px}.site-header__year-nav{flex:1;display:flex;align-items:center;justify-content:center;gap:2px;flex-wrap:wrap;font-size:13px}.site-header__year-link{color:var(--c-fg-2);text-decoration:none;padding:6px 10px;border-radius:4px;transition:color .15s}.site-header__year-link:hover{color:var(--c-fg)}.site-header__year-link--active{color:var(--c-fg);text-decoration:underline;text-underline-offset:6px;text-decoration-thickness:1.5px}.site-header__year-sep{color:#ccc;font-size:11px}.site-header__right{flex:none;min-width:180px;display:flex;justify-content:flex-end}.site-header__avatar-btn{width:32px;height:32px;border-radius:50%;padding:0;background:#f4f4f4;border:1px solid var(--c-border);cursor:pointer;overflow:hidden;display:inline-flex;align-items:center;justify-content:center}.site-header__avatar-img{width:100%;height:100%;object-fit:cover;display:block}.site-header__login-link{color:var(--c-fg);font-size:13px;text-decoration:none;font-weight:500}.site-header__guest{color:var(--c-fg-3);cursor:default}.site-header__menu-wrap{position:relative}.site-header__menu{position:absolute;right:0;top:calc(100% + 6px);min-width:180px;background:var(--c-bg);border:1px solid var(--c-border);border-radius:6px;box-shadow:0 8px 24px rgba(0,0,0,8%),0 0 0 1px rgba(0,0,0,2%);overflow:hidden;padding:4px 0;z-index:1;animation:site-header-menu-in .12s ease}@keyframes site-header-menu-in{from{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:translateY(0)}}.site-header__menu-head{padding:10px 14px 8px;border-bottom:1px solid var(--c-border);margin-bottom:4px}.site-header__menu-name{font-size:13px;font-weight:500;color:var(--c-fg)}.site-header__menu-handle{font-size:11.5px;color:var(--c-fg-3);font-family:var(--font-mono);margin-top:2px}.site-header__menu-item{display:block;width:100%;text-align:left;padding:9px 14px;border:none;background:0 0;font-size:13px;color:var(--c-fg);text-decoration:none;font-family:inherit;cursor:pointer}.site-header__menu-item:hover{background:var(--c-bg-soft)}.site-header__menu-item--logout{color:var(--c-danger)}@media(max-width:720px){.site-header__inner{padding:12px 16px;gap:12px}.site-header__logo{min-width:auto}.site-header__year-nav{font-size:12px}}