:root{--sidebar:#173552;--sidebar-hover:#244d70;--sidebar-active:#e8f3ff;--sidebar-text:#f5f8fb}
html[data-theme="green"]{--navy:#24473e;--blue:#2f806b;--sidebar:#183f35;--sidebar-hover:#285c4d;--sidebar-active:#e5f5ef;--sidebar-text:#f5faf8}
html[data-theme="charcoal"]{--navy:#333b43;--blue:#596b7c;--sidebar:#2c333a;--sidebar-hover:#444d56;--sidebar-active:#edf1f4;--sidebar-text:#f7f8f9}
.header-brand{display:flex;align-items:center;gap:12px}.brand-logo{width:42px;height:42px;object-fit:contain;display:block;clip-path:inset(2px round 8px)}.header-brand span{color:#fff;font-size:19px;font-weight:700;letter-spacing:.5px}
aside{background:var(--sidebar);padding:18px 10px;border-right:0;color:var(--sidebar-text);font-family:var(--navigation-font,"Microsoft YaHei")}aside a{padding:11px 15px;margin-bottom:4px;color:var(--sidebar-text);font-family:var(--navigation-font,"Microsoft YaHei");font-size:var(--navigation-size,14px);font-weight:var(--navigation-weight,700);line-height:1.35;transition:background .15s,color .15s}aside a:hover{background:rgba(255,255,255,.09);color:var(--sidebar-text)}aside a.active{background:rgba(255,255,255,.14);color:var(--sidebar-text);box-shadow:inset 3px 0 rgba(255,255,255,.75)}.menu-bottom{border-top-color:#ffffff2b}
.theme-panel{margin-bottom:20px}.theme-panel p{color:#71808d}.theme-options{display:flex;gap:10px;flex-wrap:wrap}.theme-options button{display:flex;align-items:center;gap:8px;border:2px solid #d8e0e6;background:#fff;border-radius:8px;padding:10px 14px;cursor:pointer;font-weight:700}.theme-options button.selected{border-color:var(--blue);background:#f2f8fd}.theme-dot{width:18px;height:18px;border-radius:50%;display:inline-block}.theme-dot.navy{background:#173552}.theme-dot.green{background:#183f35}.theme-dot.charcoal{background:#2c333a}
@media(max-width:700px){.brand-logo{width:38px;height:38px}.header-brand span{font-size:17px}aside{background:var(--sidebar)}aside a{color:var(--sidebar-text);font-size:13px}.menu-bottom{border-left-color:#ffffff33!important}}