.green‑building‑float {
            position: fixed;
            right: 24px;
            bottom: 40px;
            display: flex;
            flex-direction: column;
            gap:12px;
            z-index: 999;
        }
         .float-btn{
            width:45px;
            height:45px;
            border:none;
            border-radius:6px;
            padding:5px;
            background: linear-gradient(145deg,#43a068,#2b7d4c);
            color:#ffffff;
            font-size:14px;
            line-height: 14px;
            cursor:pointer;
            box-shadow: 0 4px 12px rgba(43,125,76,0.28);
            transition: all 0.3s ease;
            border:1px solid rgba(255,255,255,0.2);
        }
        .float-btn:hover{
            transform: translateY(-3px);
            background: linear-gradient(145deg,#51b478,#338c57);
            box-shadow: 0 6px 18px rgba(43,125,76,0.38);
        }
        .float-btn:active{
            transform: translateY(1px);
        }
        .float-btn.hide{
            opacity:0;
            visibility:hidden;
            pointer-events:none;
        }

        /* 移动端适配 */
        @media(max-width:768px){
            .green‑building‑float{
                right:14px;
                bottom:24px;
            }
            .float-btn{
                width:44px;
                height:44px;
                font-size:18px;
            }
        }