*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --bg:#0f1923;--bg2:#16232f;--bg3:#1c2e3d;--bg4:#243b4d;
  --primary:#5b8def;--primary2:#7c5cff;--accent:#00d4aa;--accent2:#00b4d8;
  --danger:#ff6b6b;--warning:#ffa502;--info:#70a1ff;--yellow:#ffd93d;
  --text:#e8edf2;--text2:#a0b0bf;--text3:#6b7d8d;--border:#243b4d;
  --radius:10px;--radius2:14px;--shadow:0 4px 16px rgba(0,0,0,.3);
  --sidebar-w:200px;--topbar-h:48px;
  --vh:1vh;
}
html{font-size:16px;-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI','PingFang SC','Hiragino Sans GB','Microsoft YaHei',sans-serif;background:var(--bg);color:var(--text);min-height:100vh;line-height:1.5;-webkit-tap-highlight-color:transparent;overflow-x:hidden;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;touch-action:manipulation}
a{color:var(--primary);text-decoration:none}
button{font-family:inherit;cursor:pointer;border:none;outline:none;background:none;color:inherit;font-size:inherit;-webkit-appearance:none;appearance:none}
input,textarea,select{font-family:inherit;font-size:inherit;outline:none;border:none;background:none;color:inherit;-webkit-appearance:none;appearance:none;border-radius:0}
textarea{resize:vertical}
img{max-width:100%;display:block}
::-webkit-scrollbar{width:6px;height:6px}
::-webkit-scrollbar-thumb{background:var(--bg4);border-radius:3px}
::-webkit-scrollbar-track{background:transparent}

/* === 登录页 === */
.login-page{position:fixed;inset:0;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#0a1118 0%,#16232f 50%,#1a2840 100%);padding:1rem;padding-top:max(1rem,env(safe-area-inset-top));padding-bottom:max(1rem,env(safe-area-inset-bottom));overflow-y:auto;-webkit-overflow-scrolling:touch}
.login-card{background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius2);padding:2rem;width:100%;max-width:400px;box-shadow:var(--shadow);animation:fadeUp .4s ease}
@keyframes fadeUp{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}
.login-header{text-align:center;margin-bottom:1.5rem}
.login-header h1{font-size:1.5rem;background:linear-gradient(135deg,var(--primary),var(--accent));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:.3rem;letter-spacing:-.5px}
.login-header p{color:var(--text3);font-size:.82rem}
.login-tabs{display:flex;gap:.3rem;margin-bottom:1.2rem;background:var(--bg3);border-radius:var(--radius);padding:.25rem}
.login-tab{flex:1;padding:.55rem;text-align:center;border-radius:8px;font-size:.85rem;color:var(--text3);transition:all .2s;font-weight:500;min-height:40px;display:flex;align-items:center;justify-content:center;gap:.3rem}
.login-tab.active{background:linear-gradient(135deg,var(--primary),var(--primary2));color:#fff;font-weight:600;box-shadow:0 2px 8px rgba(91,141,239,.3)}
.form-group{margin-bottom:.8rem}
.form-group label{display:block;font-size:.78rem;color:var(--text2);margin-bottom:.25rem;font-weight:500}
.form-input{width:100%;padding:.6rem .8rem;background:var(--bg3);border:1.5px solid var(--border);border-radius:8px;font-size:.9rem;color:var(--text);transition:border-color .2s,box-shadow .2s;min-height:42px}
.form-input:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(91,141,239,.15)}
.form-hint{font-size:.72rem;color:var(--text3);margin-top:.2rem;min-height:1em;transition:color .2s}
.form-hint.ok{color:var(--accent)}
.form-hint.err{color:var(--danger)}
.form-hint.loading{color:var(--info)}

/* === 按钮 === */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.35rem;padding:.6rem 1.2rem;border-radius:var(--radius);font-weight:600;font-size:.85rem;transition:all .2s;white-space:nowrap;border:1.5px solid transparent;min-height:42px;-webkit-user-select:none;user-select:none}
.btn:active{transform:scale(.96)}
.btn-primary{background:linear-gradient(135deg,var(--primary),var(--primary2));color:#fff;box-shadow:0 2px 10px rgba(91,141,239,.25)}
.btn-primary:disabled{opacity:.4;cursor:not-allowed;box-shadow:none}
.btn-success{background:linear-gradient(135deg,var(--accent),var(--accent2));color:#0a1118}
.btn-danger{background:linear-gradient(135deg,#ff6b6b,#ee5a24);color:#fff}
.btn-sm{padding:.4rem .75rem;font-size:.78rem;min-height:34px}
.btn-block{width:100%}
.btn .spinner{width:14px;height:14px;border:2px solid rgba(255,255,255,.3);border-top-color:#fff;border-radius:50%;animation:spin .6s linear infinite;flex-shrink:0}
@keyframes spin{to{transform:rotate(360deg)}}

/* === 主应用布局 === */
.app-container{display:flex;min-height:100vh}
.sidebar{width:var(--sidebar-w);background:var(--bg2);border-right:1px solid var(--border);display:flex;flex-direction:column;position:fixed;top:0;left:0;bottom:0;z-index:200;transition:transform .3s cubic-bezier(.4,0,.2,1);padding:.5rem .4rem;padding-top:max(.5rem,env(safe-area-inset-top))}
.sidebar-header{padding:.4rem .5rem .5rem;border-bottom:1px solid var(--border);margin-bottom:.3rem}
.sidebar-header h2{font-size:.95rem;background:linear-gradient(135deg,var(--primary),var(--accent));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;letter-spacing:-.3px}
.sidebar-header .ver{font-size:.65rem;color:var(--text3);margin-top:.15rem}
.sidebar-nav{display:flex;flex-direction:column;gap:.12rem;flex:1;overflow-y:auto;padding:.2rem 0}
.nav-item{display:flex;align-items:center;gap:.5rem;padding:.5rem .6rem;border-radius:8px;font-size:.82rem;color:var(--text2);transition:all .2s;text-align:left;min-height:42px;width:100%;position:relative;overflow:hidden}
.nav-item::before{content:'';position:absolute;left:0;top:50%;transform:translateY(-50%);width:3px;height:0;background:linear-gradient(180deg,var(--primary),var(--accent));border-radius:0 2px 2px 0;transition:height .2s}
.nav-item:hover{background:var(--bg3);color:var(--text)}
.nav-item.active{background:linear-gradient(135deg,rgba(91,141,239,.15),rgba(0,212,170,.1));color:var(--primary);font-weight:600}
.nav-item.active::before{height:60%}
.nav-item .ico{font-size:1rem;width:20px;text-align:center;flex-shrink:0}
.nav-item .badge-dot{position:absolute;right:.5rem;top:50%;transform:translateY(-50%);width:7px;height:7px;background:var(--danger);border-radius:50%;animation:bellPulse 1.5s ease infinite}
.sidebar-footer{margin-top:auto;padding:.4rem .3rem;border-top:1px solid var(--border)}
.user-info{display:flex;align-items:center;gap:.4rem;padding:.35rem .4rem;border-radius:8px;margin-bottom:.3rem}
.user-avatar{width:28px;height:28px;border-radius:50%;background:linear-gradient(135deg,var(--primary2),var(--accent));display:flex;align-items:center;justify-content:center;font-size:.75rem;font-weight:700;color:#fff;flex-shrink:0}
.user-name{font-size:.78rem;color:var(--text2);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.btn-logout{width:100%;padding:.4rem;font-size:.75rem;color:var(--text3);border-radius:6px;text-align:center;min-height:36px;display:flex;align-items:center;justify-content:center;gap:.3rem;transition:all .2s}
.btn-logout:hover{background:rgba(255,107,107,.1);color:var(--danger)}
.btn-logout:active{background:rgba(255,107,107,.2)}
.api-status-bar{padding:.3rem .5rem;margin-bottom:.3rem;background:var(--bg3);border-radius:6px;font-size:.65rem;color:var(--text3);line-height:1.6;display:none;word-break:break-all}
.api-status-bar.visible{display:block}

/* === 主内容区 === */
.main-content{margin-left:var(--sidebar-w);flex:1;display:flex;flex-direction:column;min-height:100vh}
.top-bar{height:var(--topbar-h);display:flex;align-items:center;justify-content:space-between;padding:0 .8rem;background:rgba(22,35,47,.95);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:100}
.top-bar h1{font-size:1rem;font-weight:600;letter-spacing:-.3px}
.top-right{display:flex;align-items:center;gap:.5rem}
.bell-btn{position:relative;width:36px;height:36px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:1.1rem;transition:background .2s;min-width:36px;flex-shrink:0}
.bell-btn:active{background:var(--bg3)}
.bell-dot{position:absolute;top:4px;right:4px;width:8px;height:8px;background:var(--danger);border-radius:50%;border:2px solid var(--bg2);animation:bellPulse 1.5s ease infinite}
@keyframes bellPulse{0%,100%{transform:scale(1);opacity:1}50%{transform:scale(1.3);opacity:.7}}
.content-area{flex:1;padding:.8rem;padding-bottom:max(.8rem,env(safe-area-inset-bottom))}

/* === 页面标题区 === */
.page-header{display:flex;align-items:flex-start;justify-content:space-between;margin-bottom:.8rem;gap:.5rem;flex-wrap:wrap}
.page-header h2{font-size:1.1rem;display:flex;align-items:center;gap:.4rem;letter-spacing:-.3px}
.page-header p{font-size:.78rem;color:var(--text3);margin-top:.2rem}
.page-actions{display:flex;gap:.4rem;align-items:center;flex-wrap:wrap}

/* === 搜索框 === */
.search-box{position:relative;display:flex;align-items:center}
.search-input{padding:.45rem .7rem .45rem 2rem;background:var(--bg3);border:1.5px solid var(--border);border-radius:8px;font-size:.82rem;color:var(--text);width:200px;transition:width .25s,border-color .2s;min-height:36px}
.search-input:focus{width:240px;border-color:var(--primary);box-shadow:0 0 0 3px rgba(91,141,239,.12)}
.search-icon{position:absolute;left:.6rem;font-size:.85rem;color:var(--text3);pointer-events:none}
.search-clear{position:absolute;right:.4rem;width:20px;height:20px;border-radius:50%;display:none;align-items:center;justify-content:center;font-size:.7rem;color:var(--text3);background:var(--bg4);cursor:pointer;transition:all .15s}
.search-clear.visible{display:flex}
.search-clear:active{background:var(--danger);color:#fff}

/* === 筛选标签 === */
.filter-tabs{display:flex;gap:.3rem;margin-bottom:.8rem;flex-wrap:wrap}
.filter-tab{padding:.35rem .8rem;border-radius:6px;font-size:.78rem;color:var(--text3);background:var(--bg3);transition:all .2s;white-space:nowrap;min-height:34px;display:inline-flex;align-items:center}
.filter-tab:active{transform:scale(.95)}
.filter-tab.active{background:var(--primary);color:#fff;font-weight:600;box-shadow:0 2px 6px rgba(91,141,239,.3)}

/* === 话题网格 === */
.topic-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:.7rem}
.topic-card{background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius2);padding:.8rem;position:relative;overflow:hidden;transition:transform .2s,box-shadow .2s;border-top:3px solid transparent}
.topic-card:hover{transform:translateY(-2px);box-shadow:var(--shadow)}
.topic-card.closed{opacity:.5}
.topic-card .top-line{display:flex;align-items:center;gap:.5rem;margin-bottom:.4rem}
.topic-icon{width:36px;height:36px;border-radius:8px;display:flex;align-items:center;justify-content:center;font-size:1.2rem;background:var(--bg3);flex-shrink:0}
.topic-title{font-size:.92rem;font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;flex:1;min-width:0}
.topic-desc{font-size:.78rem;color:var(--text3);margin-bottom:.5rem;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;line-height:1.4}
.topic-meta{display:flex;gap:.6rem;font-size:.72rem;color:var(--text3);margin-bottom:.5rem;flex-wrap:wrap}
.topic-meta span{display:inline-flex;align-items:center;gap:.2rem}
.topic-footer{display:flex;align-items:center;justify-content:space-between;gap:.4rem;padding-top:.5rem;border-top:1px solid var(--border)}
.topic-footer .badges{display:flex;gap:.3rem;align-items:center;flex-wrap:wrap}
.topic-actions{display:flex;gap:.4rem;align-items:center}

/* === 状态徽章 === */
.badge{display:inline-flex;align-items:center;gap:.2rem;padding:.2rem .5rem;border-radius:20px;font-size:.68rem;font-weight:500;white-space:nowrap}
.badge-green{background:rgba(0,212,170,.15);color:var(--accent)}
.badge-blue{background:rgba(91,141,239,.15);color:var(--primary)}
.badge-gray{background:rgba(160,176,191,.1);color:var(--text3)}
.badge-yellow{background:rgba(255,217,61,.15);color:var(--yellow)}
.badge-red{background:rgba(255,107,107,.15);color:var(--danger)}

/* === 按钮固定宽度 === */
.btn-fixed{display:inline-flex;align-items:center;justify-content:center;gap:.3rem;padding:.5rem .8rem;font-size:.8rem;font-weight:600;border-radius:8px;border:1.5px solid transparent;min-width:110px;width:110px;white-space:nowrap;min-height:38px}
.btn-success{background:linear-gradient(135deg,var(--accent),var(--accent2));color:#0a1118}

/* === 反馈卡片 === */
.feedback-list{display:flex;flex-direction:column;gap:.6rem}
.fb-card{background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius);padding:.8rem;position:relative;transition:border-color .2s}
.fb-card:hover{border-color:var(--bg4)}
.fb-header{display:flex;align-items:center;gap:.4rem;margin-bottom:.4rem;flex-wrap:wrap}
.fb-user{font-weight:600;font-size:.85rem}
.fb-topic-tag{font-size:.7rem;padding:.15rem .45rem;background:var(--bg3);border-radius:4px;color:var(--text2)}
.fb-time{font-size:.7rem;color:var(--text3);margin-left:auto;white-space:nowrap}
.fb-body{font-size:.85rem;color:var(--text2);line-height:1.6;white-space:pre-wrap;word-break:break-word}
.fb-images{display:flex;gap:.4rem;margin-top:.4rem;flex-wrap:wrap}
.fb-img-thumb{width:80px;height:80px;object-fit:cover;border-radius:6px;cursor:pointer;border:1px solid var(--border);transition:opacity .2s}
.fb-img-thumb:active{opacity:.7}
.fb-reply{margin-top:.5rem;padding:.5rem .7rem;background:rgba(91,141,239,.08);border-left:3px solid var(--primary);border-radius:0 6px 6px 0;font-size:.8rem;line-height:1.5}
.fb-reply strong{color:var(--primary)}
.reply-box{margin-top:.5rem;padding:.5rem;background:var(--bg3);border-radius:8px}
.reply-box-inner{display:flex;gap:.4rem;align-items:flex-start}
.reply-box-inner textarea{flex:1;min-height:60px;padding:.5rem;background:var(--bg);border:1px solid var(--border);border-radius:6px;font-size:.82rem;color:var(--text);resize:vertical;min-height:60px}
.reply-btn-group{display:flex;flex-direction:column;gap:.3rem;flex-shrink:0}
.reply-status{font-size:.7rem;color:var(--text3);margin-top:.3rem;min-height:1em}
.reply-status.loading{color:var(--info)}
.reply-status.ok{color:var(--accent)}
.reply-status.err{color:var(--danger)}

/* === 讨论群聊 === */
.chat-container{display:flex;flex-direction:column;height:calc(100vh - var(--topbar-h) - 2rem);height:calc(var(--real-vh,100vh) - var(--topbar-h) - 2rem);background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius2);overflow:hidden}
.chat-header{display:flex;align-items:center;gap:.5rem;padding:.6rem .8rem;border-bottom:1px solid var(--border);background:var(--bg3)}
.chat-header h3{font-size:.9rem;font-weight:600}
.chat-messages{flex:1;overflow-y:auto;padding:.6rem;display:flex;flex-direction:column;gap:.4rem;-webkit-overflow-scrolling:touch;justify-content:flex-end;scroll-behavior:auto}
.chat-msg{display:flex;gap:.4rem;max-width:85%}
.chat-msg.self{margin-left:auto;flex-direction:row-reverse}
.chat-msg .avatar{width:28px;height:28px;border-radius:50%;flex-shrink:0;display:flex;align-items:center;justify-content:center;font-size:.7rem;font-weight:700;color:#fff}
.chat-msg.self .avatar{background:linear-gradient(135deg,var(--primary),var(--primary2))}
.chat-msg:not(.self) .avatar{background:linear-gradient(135deg,var(--accent),var(--accent2))}
.msg-bubble{padding:.4rem .65rem;background:var(--bg3);border-radius:10px;font-size:.82rem;line-height:1.5;word-break:break-word}
.chat-msg.self .msg-bubble{background:linear-gradient(135deg,rgba(91,141,239,.2),rgba(124,92,255,.15));border:1px solid rgba(91,141,239,.3)}
.msg-meta{font-size:.65rem;color:var(--text3);margin-top:.15rem;text-align:right}
.chat-input-area{padding:.5rem .6rem;border-top:1px solid var(--border);background:var(--bg3);display:flex;gap:.4rem;align-items:center;position:relative}
.chat-input{flex:1;padding:.5rem .7rem;background:var(--bg);border:1px solid var(--border);border-radius:8px;font-size:.85rem;color:var(--text);resize:none;max-height:80px;min-height:36px;min-width:0}
.chat-input:focus{border-color:var(--primary)}
.chat-send-btn{padding:.5rem .8rem;border-radius:8px;background:linear-gradient(135deg,var(--primary),var(--primary2));color:#fff;font-size:.8rem;font-weight:600;white-space:nowrap;min-width:60px;min-height:36px;flex-shrink:0;transition:opacity .2s}
.chat-send-btn:disabled{opacity:.4}
.chat-send-btn:active{transform:scale(.95)}
.chat-emoji-btn{font-size:1.1rem;width:36px;height:36px;border-radius:8px;display:flex;align-items:center;justify-content:center;background:var(--bg);border:1px solid var(--border);flex-shrink:0;transition:background .15s}
.chat-emoji-btn:active{background:var(--bg4)}
.emoji-panel{display:none;position:absolute;bottom:60px;right:.5rem;background:var(--bg2);border:1px solid var(--border);border-radius:8px;padding:.4rem;box-shadow:var(--shadow);z-index:50;width:240px;flex-wrap:wrap;gap:.2rem}
.emoji-panel.visible{display:flex}
.emoji-panel span{font-size:1.1rem;padding:.2rem .3rem;cursor:pointer;border-radius:4px;transition:background .1s}
.emoji-panel span:active{background:var(--bg3)}

/* === 模态框 === */
.modal-overlay{position:fixed;inset:0;background:rgba(0,0,0,.6);display:flex;align-items:center;justify-content:center;z-index:300;padding:1rem;padding-top:max(1rem,env(safe-area-inset-top));padding-bottom:max(1rem,env(safe-area-inset-bottom));animation:fadeIn .2s ease}
@keyframes fadeIn{from{opacity:0}to{opacity:1}}
.modal-overlay.hidden{display:none}
.modal{background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius2);padding:1.2rem;width:100%;max-width:480px;max-height:85vh;overflow-y:auto;animation:fadeUp .25s ease}
.modal h3{margin-bottom:.8rem;font-size:1rem;font-weight:600}
.modal label{display:block;font-size:.78rem;color:var(--text2);margin:.5rem 0 .2rem;font-weight:500}
.modal input,.modal textarea,.modal select{width:100%;padding:.5rem .7rem;background:var(--bg3);border:1.5px solid var(--border);border-radius:8px;font-size:.85rem;color:var(--text);min-height:38px;transition:border-color .2s}
.modal input:focus,.modal textarea:focus,.modal select:focus{border-color:var(--primary)}
.modal textarea{resize:vertical;min-height:80px}
.modal-actions{display:flex;gap:.5rem;margin-top:1rem;justify-content:flex-end;flex-wrap:wrap}

/* === 收件箱 === */
.inbox-list{display:flex;flex-direction:column;gap:.4rem}
.inbox-item{display:flex;align-items:flex-start;gap:.5rem;padding:.6rem .8rem;background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius);cursor:pointer;transition:background .2s,transform .15s}
.inbox-item:active{background:var(--bg3);transform:scale(.99)}
.inbox-item.unread{border-left:3px solid var(--primary);background:rgba(91,141,239,.05)}
.inbox-item .dot{width:8px;height:8px;border-radius:50%;background:var(--primary);margin-top:.35rem;flex-shrink:0;animation:bellPulse 1.5s ease infinite}
.inbox-item.read .dot{display:none}
.inbox-item .content{flex:1;min-width:0}
.inbox-item .title{font-size:.85rem;font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.inbox-item .preview{font-size:.75rem;color:var(--text3);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;margin-top:.15rem}
.inbox-item .time{font-size:.7rem;color:var(--text3);white-space:nowrap;margin-left:.4rem;flex-shrink:0}

/* === 表格 === */
.table-wrapper{overflow-x:auto;-webkit-overflow-scrolling:touch;border:1px solid var(--border);border-radius:var(--radius)}
table{width:100%;border-collapse:collapse;font-size:.8rem;min-width:500px}
th{text-align:left;padding:.5rem .6rem;background:var(--bg3);color:var(--text2);font-weight:600;font-size:.75rem;white-space:nowrap;position:sticky;top:0}
td{padding:.5rem .6rem;border-top:1px solid var(--border);vertical-align:middle}
tr:hover td{background:rgba(91,141,239,.03)}

/* === Toast === */
.toast-container{position:fixed;top:max(.5rem,env(safe-area-inset-top));right:max(.5rem,env(safe-area-inset-right));left:max(.5rem,env(safe-area-inset-left));z-index:500;display:flex;flex-direction:column;gap:.3rem;align-items:center;pointer-events:none}
.toast{padding:.5rem .9rem;border-radius:8px;font-size:.8rem;color:#fff;box-shadow:var(--shadow);animation:toastIn .3s ease,toastOut .3s ease 2.7s forwards;pointer-events:auto;max-width:90vw;word-break:break-word}
.toast.info{background:var(--primary)}
.toast.success{background:var(--accent);color:#0a1118}
.toast.error{background:var(--danger)}
.toast.warning{background:var(--warning);color:#0a1118}
@keyframes toastIn{from{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}
@keyframes toastOut{from{opacity:1}to{opacity:0;transform:translateY(-10px)}}

/* === 灯箱 === */
.lightbox{position:fixed;inset:0;background:rgba(0,0,0,.85);display:flex;align-items:center;justify-content:center;z-index:400;padding:1rem;animation:fadeIn .2s}
.lightbox.hidden{display:none}
.lightbox img{max-width:95vw;max-height:85vh;object-fit:contain;border-radius:8px}

/* === 拖拽上传 === */
.drag-zone{border:2px dashed var(--border);border-radius:var(--radius);padding:1rem;text-align:center;color:var(--text3);font-size:.8rem;cursor:pointer;transition:all .2s;margin-top:.5rem;min-height:60px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:.3rem}
.drag-zone:active{background:var(--bg3)}
.drag-zone.dragging{border-color:var(--primary);background:rgba(91,141,239,.08);color:var(--primary)}
.drag-zone .preview-list{display:flex;gap:.4rem;margin-top:.4rem;flex-wrap:wrap;justify-content:center}
.drag-zone .preview-item{position:relative}
.drag-zone .preview-item img{width:60px;height:60px;object-fit:cover;border-radius:6px;border:1px solid var(--border)}
.drag-zone .preview-item .remove{position:absolute;top:-4px;right:-4px;width:16px;height:16px;border-radius:50%;background:var(--danger);color:#fff;font-size:.6rem;display:flex;align-items:center;justify-content:center;cursor:pointer}

/* === 加载遮罩 === */
.loading-overlay{position:fixed;inset:0;background:rgba(15,25,35,.85);display:flex;align-items:center;justify-content:center;z-index:600;flex-direction:column;gap:.5rem;backdrop-filter:blur(2px);-webkit-backdrop-filter:blur(2px)}
.loading-overlay.hidden{display:none}
.loading-spinner{width:36px;height:36px;border:3px solid var(--bg4);border-top-color:var(--primary);border-radius:50%;animation:spin 1s linear infinite}
.loading-text{font-size:.82rem;color:var(--text2)}

/* === 移动端顶部栏 === */
.mobile-topbar{display:none;height:var(--topbar-h);align-items:center;padding:0 .5rem;background:rgba(22,35,47,.95);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:150;gap:.4rem}
.mobile-topbar .menu-btn{width:36px;height:36px;border-radius:8px;display:flex;align-items:center;justify-content:center;font-size:1.2rem;min-width:36px;transition:background .15s}
.mobile-topbar .menu-btn:active{background:var(--bg3)}
.mobile-topbar .logo{font-size:.9rem;font-weight:700;background:linear-gradient(135deg,var(--primary),var(--accent));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;letter-spacing:-.3px}
.mobile-topbar .spacer{flex:1}

/* === 侧边栏遮罩 === */
.sidebar-overlay{display:none;position:fixed;inset:0;background:rgba(0,0,0,.5);z-index:199;opacity:0;transition:opacity .3s}
.sidebar-overlay.visible{display:block;opacity:1}

/* === 隐藏工具类 === */
.hidden{display:none!important}

/* === 审核状态 === */
.audit-status{font-size:.72rem;min-height:1.2em;margin-top:.3rem;padding:.2rem .4rem;border-radius:4px;transition:all .2s}
.audit-status.idle{color:var(--text3)}
.audit-status.checking{color:var(--info);background:rgba(112,161,255,.08)}
.audit-status.passed{color:var(--accent);background:rgba(0,212,170,.08)}
.audit-status.failed{color:var(--danger);background:rgba(255,107,107,.08)}

/* === 回复面板 === */
.reply-panel{margin-top:.5rem;padding:.6rem;background:var(--bg3);border:1px solid var(--border);border-radius:var(--radius);animation:fadeUp .2s ease}
.reply-panel-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:.4rem}
.reply-panel-header span{font-size:.78rem;color:var(--primary);font-weight:600}
.reply-panel .close-btn{width:24px;height:24px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:.8rem;color:var(--text3);background:var(--bg4);cursor:pointer;transition:all .15s}
.reply-panel .close-btn:active{background:var(--danger);color:#fff}
.reply-panel textarea{width:100%;min-height:80px;max-height:200px;padding:.5rem;background:var(--bg);border:1px solid var(--border);border-radius:6px;font-size:.82rem;color:var(--text);resize:vertical}
.reply-panel-footer{display:flex;align-items:center;justify-content:space-between;margin-top:.4rem;gap:.4rem;flex-wrap:wrap}
.reply-panel-footer .status{flex:1;font-size:.72rem;min-height:1em}
.reply-panel-footer .actions{display:flex;gap:.3rem}

/* === 空状态 === */
.empty-state{text-align:center;padding:3rem 1rem;color:var(--text3)}
.empty-state .icon{font-size:2.5rem;margin-bottom:.5rem;opacity:.5}
.empty-state p{font-size:.85rem}

/* === 响应式 === */
@media(max-width:900px){
  :root{--sidebar-w:180px}
  .search-input{width:160px}
  .search-input:focus{width:180px}
}
@media(max-width:768px){
  .mobile-topbar{display:flex}
  .sidebar{transform:translateX(-100%);width:260px;padding-top:calc(env(safe-area-inset-top) + .5rem);box-shadow:var(--shadow)}
  .sidebar.open{transform:translateX(0)}
  .main-content{margin-left:0}
  .top-bar{display:none}
  .content-area{padding:.6rem;padding-top:max(.5rem,env(safe-area-inset-top))}
  .topic-grid{grid-template-columns:1fr;gap:.5rem}
  .topic-card{padding:.7rem}
  .topic-footer{flex-direction:column;align-items:stretch;gap:.4rem}
  .topic-actions{justify-content:center}
  .btn-fixed{width:45%;min-width:0;flex:1}
  .page-header{flex-direction:column;align-items:stretch}
  .page-actions{justify-content:space-between}
  .search-input{width:100%;flex:1}
  .search-input:focus{width:100%}
  .search-box{flex:1;width:100%}
  .filter-tabs{overflow-x:auto;flex-wrap:nowrap;-webkit-overflow-scrolling:touch;padding-bottom:.2rem}
  .filter-tab{flex-shrink:0}
  .modal{max-width:100%}
  .modal-actions{flex-direction:column-reverse}
  .modal-actions .btn{width:100%}
  .chat-container{height:calc(100vh - var(--topbar-h) - 1rem);height:calc(var(--real-vh,100vh) - var(--topbar-h) - 1rem)}
  .chat-msg{max-width:90%}
  .reply-box-inner{flex-direction:column}
  .reply-btn-group{flex-direction:row;width:100%}
  .reply-btn-group .btn{flex:1}
  .table-wrapper{font-size:.75rem}
  .login-card{padding:1.2rem}
  .form-input{padding:.65rem .8rem;font-size:16px;min-height:44px}
  .btn{padding:.65rem 1rem;font-size:.9rem;min-height:44px}
  .btn-sm{min-height:40px}
  .form-group label{font-size:.8rem}
  .login-tab{min-height:44px;font-size:.9rem}
  .page-header h2{font-size:1rem}
  .topic-title{font-size:.88rem}
  .topic-desc{font-size:.76rem}
  .fb-card{padding:.7rem}
  .fb-body{font-size:.82rem}
  .inbox-item{padding:.5rem .6rem}
  .inbox-item .title{font-size:.82rem}
  .nav-item{min-height:44px;font-size:.85rem}
  .nav-item .ico{font-size:1.05rem}
  .chat-input{min-height:40px;font-size:16px}
  .chat-send-btn{min-height:40px}
  .chat-emoji-btn{width:40px;height:40px}
}
@media(max-width:380px){
  .btn-fixed{font-size:.72rem;padding:.45rem .5rem}
  .topic-title{font-size:.85rem}
  .topic-desc{font-size:.75rem}
  .emoji-panel{width:200px}
  .emoji-panel span{font-size:1rem}
  .page-header h2{font-size:.95rem}
}
@media(max-width:768px) and (orientation:landscape){
  .login-card{max-width:360px;padding:1rem}
  .chat-container{height:calc(100vh - 50px)}
  .mobile-topbar{height:40px}
}
@media(hover:hover) and (pointer:fine){
  .topic-card:hover{transform:translateY(-2px);box-shadow:var(--shadow)}
  .nav-item:hover{background:var(--bg3);color:var(--text)}
  .inbox-item:hover{background:var(--bg3)}
  .btn:hover{filter:brightness(1.1)}
}
@media(hover:none){
  .topic-card:hover{transform:none;box-shadow:none}
  .nav-item:hover{background:transparent;color:var(--text2)}
  .nav-item.active:hover{background:linear-gradient(135deg,rgba(91,141,239,.15),rgba(0,212,170,.1))}
  .inbox-item:hover{background:var(--bg2)}
  .btn:hover{filter:none}
}