/* ============ 布局层：顶栏 / 主区域 / 底部导航 ============ */

/* ---- 顶栏 ---- */
#topbar{position:fixed;top:0;left:0;right:0;z-index:100;display:flex;align-items:center;gap:22px;
  padding:0 26px;height:62px;background:rgba(8,8,18,.78);backdrop-filter:blur(18px);
  border-bottom:1px solid var(--line)}
.logo{display:flex;align-items:center;gap:10px;font-size:20px;font-weight:700;letter-spacing:1px}
.logo-text i{font-style:normal;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.logo-cube{width:26px;height:26px;position:relative;transform-style:preserve-3d;animation:cubeSpin 9s linear infinite}
.logo-cube i{position:absolute;inset:0;border:1.5px solid var(--cyan);opacity:.85;border-radius:4px}
.logo-cube i:nth-child(1){transform:translateZ(13px);border-color:var(--cyan)}
.logo-cube i:nth-child(2){transform:rotateY(180deg) translateZ(13px);border-color:var(--pink)}
.logo-cube i:nth-child(3){transform:rotateY(90deg) translateZ(13px);border-color:var(--blue)}
.logo-cube i:nth-child(4){transform:rotateY(-90deg) translateZ(13px);border-color:var(--violet)}
.logo-cube i:nth-child(5){transform:rotateX(90deg) translateZ(13px);border-color:var(--gold)}
.logo-cube i:nth-child(6){transform:rotateX(-90deg) translateZ(13px);border-color:var(--cyan)}
@keyframes cubeSpin{from{transform:rotateX(-18deg) rotateY(0)}to{transform:rotateX(-18deg) rotateY(360deg)}}

.main-nav{display:flex;gap:4px;flex:1}
.main-nav a{padding:8px 16px;border-radius:10px;font-size:15px;color:var(--txt2);transition:.25s;position:relative}
.main-nav a:hover{color:var(--txt);background:rgba(120,120,255,.1)}
.main-nav a.active{color:var(--txt);background:rgba(120,120,255,.14)}
.main-nav a.active::after{content:"";position:absolute;left:16px;right:16px;bottom:2px;height:2px;border-radius:2px;background:var(--grad)}

.top-actions{display:flex;align-items:center;gap:10px}
.search-box{position:relative}
.search-box input{width:210px;height:36px;border-radius:18px;border:1px solid var(--line2);
  background:rgba(30,30,60,.5);color:var(--txt);padding:0 16px 0 36px;font-size:13px;outline:none;transition:.3s;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%239a9ab8' stroke-width='2'%3E%3Ccircle cx='11' cy='11' r='8'/%3E%3Cpath d='m21 21-4.35-4.35'/%3E%3C/svg%3E");
  background-repeat:no-repeat;background-position:13px center}
.search-box input:focus{width:280px;border-color:var(--cyan);box-shadow:var(--glow)}
.search-suggest{position:absolute;top:42px;left:0;width:320px;max-height:340px;overflow:auto;background:var(--panel-solid);
  border:1px solid var(--line2);border-radius:var(--r);display:none;box-shadow:0 16px 50px rgba(0,0,0,.6)}
.search-suggest.show{display:block}
.sug-item{display:flex;align-items:center;gap:10px;padding:10px 14px;font-size:13px}
.sug-item:hover,.sug-item.on{background:rgba(120,120,255,.12)}
.sug-item .sug-tag{margin-left:auto;font-size:11px;color:var(--txt3)}
.icon-btn{position:relative;width:36px;height:36px;border-radius:10px;display:flex;align-items:center;justify-content:center;
  font-size:17px;background:rgba(120,120,255,.1);border:1px solid var(--line);transition:.25s}
.icon-btn:hover{background:rgba(120,120,255,.22);transform:translateY(-1px)}
.badge{position:absolute;top:-5px;right:-5px;min-width:17px;height:17px;border-radius:9px;background:var(--pink);
  color:#fff;font-size:10px;display:flex;align-items:center;justify-content:center;padding:0 4px;font-weight:700}
.user-chip{display:flex;align-items:center;gap:8px;padding:5px 12px 5px 5px;border-radius:20px;
  background:rgba(120,120,255,.1);border:1px solid var(--line);font-size:13px}
.user-chip img{width:28px;height:28px;border-radius:50%;object-fit:cover;background:#22224a}

/* ---- 主区域 ---- */
#app{position:relative;z-index:10;max-width:1280px;margin:0 auto;padding:86px 22px 90px;min-height:100vh}

/* ---- 顶栏 Logo ---- */
#topbar .logo-img{width:30px;height:30px;flex:none;filter:drop-shadow(0 2px 8px rgba(94,234,212,.35))}
#topbar .logo{display:flex;align-items:center;gap:10px}

/* ---- 通知角标与图标按钮 ---- */
.icon-btn{position:relative;display:inline-flex;align-items:center;justify-content:center;min-width:38px;height:38px}
.icon-btn .badge{position:absolute;top:2px;right:2px;min-width:16px;height:16px;padding:0 4px;border-radius:9px;
  background:linear-gradient(120deg,#f0a6c0,#818cf8);color:#fff;font-size:10.5px;line-height:16px;text-align:center;font-weight:700}

/* ---- 页脚 ---- */
#siteFooter{margin:64px auto 0;padding:34px 22px 96px;max-width:1180px;text-align:center;
  border-top:1px solid var(--line);color:var(--txt3)}
#siteFooter .foot-brand img{opacity:.9}
#siteFooter .foot-brand p{margin:10px 0 0;font-size:13px}
#siteFooter .foot-nav{display:flex;flex-wrap:wrap;gap:8px 20px;justify-content:center;margin:18px 0}
#siteFooter .foot-nav a{color:var(--txt2);font-size:13px;text-decoration:none;transition:color .2s}
#siteFooter .foot-nav a:hover{color:var(--cyan)}
#siteFooter .foot-copy{font-size:12.5px;margin:0}

/* Logo 文字不换行（避免窄屏被压缩成竖排） */
#topbar .logo-text{white-space:nowrap;letter-spacing:1px}

/* 导航项不换行 */
.main-nav a{white-space:nowrap;flex:none}
#topbar .search-box input{white-space:nowrap}

/* 页脚数据源指示（可点击切换 本地演示 / 后端 API） */
#siteFooter .foot-src-row{margin:12px 0 0}
.foot-src{display:inline-flex;align-items:center;gap:6px;padding:5px 12px;border-radius:999px;cursor:pointer;
  font-size:12px;color:var(--txt3);background:transparent;border:1px solid var(--line);transition:.2s}
.foot-src::before{content:'';width:6px;height:6px;border-radius:50%;background:var(--txt3)}
.foot-src:hover{color:var(--txt2);border-color:var(--txt3)}
.foot-src.on{color:var(--cyan);border-color:rgba(94,234,212,.4)}
.foot-src.on::before{background:var(--cyan);box-shadow:0 0 8px var(--cyan)}
.foot-src.warn{color:#f0a6c0;border-color:rgba(240,166,192,.4)}
.foot-src.warn::before{background:#f0a6c0}