:root{--bg:#f4f6f8;--panel:#fff;--text:#182230;--muted:#667085;--line:#dfe4ea;--blue:#1769aa;--blue-soft:#edf6fc;--green:#16805c;--red:#b42318}*{box-sizing:border-box}body{margin:0;color:var(--text);background:var(--bg);font-family:Inter,"Segoe UI","Microsoft YaHei",sans-serif;font-size:14px;line-height:1.55}button,input,textarea,select{font:inherit}.topbar{position:sticky;top:0;z-index:20;border-bottom:1px solid var(--line);background:#ffffffed;backdrop-filter:blur(12px)}.topbar-inner{display:flex;align-items:center;width:min(1180px,calc(100% - 32px));height:64px;margin:auto}.brand{display:flex;align-items:center;gap:10px;margin-right:36px;color:inherit;text-decoration:none}.brand>span{display:grid;width:34px;height:34px;place-items:center;border-radius:5px;color:#fff;background:var(--blue);font-size:19px;font-weight:800}.brand strong{line-height:1.15}.brand small{display:block;color:var(--muted);font-size:10px;font-weight:500}.topbar nav{display:flex;align-self:stretch;gap:4px}.topbar nav a,.topbar nav button{display:flex;align-items:center;padding:0 13px;border:0;color:#475467;background:transparent;text-decoration:none;cursor:pointer}.topbar nav .nav-active,.topbar nav a:hover,.topbar nav button:hover{color:var(--blue)}.topbar nav .nav-active{box-shadow:inset 0 -2px var(--blue);font-weight:700}.top-actions{display:flex;align-items:center;gap:8px;margin-left:auto}.primary,.outline,.account-button,.icon-button{min-height:36px;border-radius:5px;cursor:pointer}.primary{padding:8px 14px;border:1px solid var(--blue);color:#fff;background:var(--blue);font-weight:700}.outline,.account-button{padding:8px 12px;border:1px solid var(--line);background:#fff}.icon-button{position:relative;width:36px;border:1px solid var(--line);background:#fff;font-size:20px}.icon-button i:not(:empty){position:absolute;top:-5px;right:-5px;min-width:18px;padding:1px 4px;border-radius:9px;color:#fff;background:var(--red);font-size:10px;font-style:normal}.page{width:min(1180px,calc(100% - 32px));margin:20px auto 70px}.notice{display:flex;gap:16px;padding:10px 14px;border:1px solid #c9dceb;border-left:3px solid var(--blue);border-radius:5px;background:var(--blue-soft);color:#475467}.notice strong{flex:none;color:var(--blue)}.forum-grid{display:grid;grid-template-columns:minmax(0,1fr) 260px;gap:20px;margin-top:16px}.main-column,.side-section{border:1px solid var(--line);background:var(--panel)}.toolbar{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:14px 16px;border-bottom:1px solid var(--line)}.search{display:flex;flex:1;max-width:480px}.search input{flex:1;min-width:0;padding:9px 11px;border:1px solid var(--line);border-radius:5px 0 0 5px}.search button{padding:8px 14px;border:1px solid var(--blue);border-radius:0 5px 5px 0;color:#fff;background:var(--blue);cursor:pointer}.sort-tabs{display:flex}.sort-tabs button{padding:7px 11px;border:0;border-bottom:2px solid transparent;background:transparent;color:var(--muted);cursor:pointer}.sort-tabs .active{border-color:var(--blue);color:var(--blue);font-weight:700}.view-title{display:flex;align-items:center;justify-content:space-between;padding:16px 18px;border-bottom:1px solid var(--line)}h1{margin:0;font-size:20px}h2{margin:0 0 12px;font-size:16px}.view-title p,.side-section p{margin:3px 0 0;color:var(--muted)}.content-list{min-height:320px}.side-column{display:flex;flex-direction:column;gap:16px}.side-section{padding:16px}.category-list{display:grid}.category-list button{display:flex;justify-content:space-between;padding:9px 4px;border:0;border-bottom:1px solid #eef1f4;background:transparent;text-align:left;cursor:pointer}.category-list button:hover,.category-list button.active{color:var(--blue)}.category-list small{color:var(--muted)}#stats{display:grid;grid-template-columns:repeat(3,1fr);margin:0;text-align:center}#stats div+div{border-left:1px solid var(--line)}#stats dt{color:var(--muted);font-size:12px}#stats dd{margin:3px 0 0;font-size:18px;font-weight:750}.pagination{display:flex;justify-content:center;gap:6px;padding:16px;border-top:1px solid var(--line)}.pagination:empty{display:none}.pagination button{min-width:34px;height:34px;border:1px solid var(--line);border-radius:4px;background:#fff;cursor:pointer}.pagination button.active{border-color:var(--blue);color:#fff;background:var(--blue)}.empty{padding:70px 20px;color:var(--muted);text-align:center}.editor-dialog{width:min(760px,calc(100% - 30px));padding:26px;border:1px solid var(--line);border-radius:7px}.editor-dialog::backdrop{background:#10182899}.dialog-close{position:absolute;top:10px;right:10px}.dialog-close button{width:32px;border:0;background:transparent;font-size:24px;cursor:pointer}.editor-dialog label{display:grid;gap:6px;margin:14px 0;color:#344054;font-weight:650}.editor-dialog input,.editor-dialog select,.editor-dialog textarea{width:100%;padding:10px;border:1px solid #cbd2dc;border-radius:5px;resize:vertical}.editor-row{display:grid;grid-template-columns:1fr 1fr;gap:14px}.dialog-actions{display:flex;justify-content:flex-end;gap:8px}.form-error{min-height:20px;color:var(--red)}@media(max-width:850px){.forum-grid{grid-template-columns:1fr}.side-column{display:grid;grid-template-columns:1fr 1fr}.topbar nav{display:none}}@media(max-width:600px){.topbar-inner{height:auto;min-height:60px;flex-wrap:wrap;padding:10px 0}.brand{margin-right:auto}.top-actions .icon-button{display:none}.page{width:min(100% - 20px,1180px)}.notice{display:block}.toolbar{align-items:stretch;flex-direction:column}.side-column{display:block}.side-section{margin-top:12px}.editor-row{grid-template-columns:1fr}.primary[data-new-topic]{padding-inline:10px}.account-button{max-width:110px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}}