/* ============================================
   踩坑网 · AI Lab — 主样式表
   深色科技风 · 响应式 (桌面 + 平板 + 手机)
   ============================================ */

/* ---------- 基础重置 ---------- */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
:root{
  --bg:#0a0e14;
  --bg-card:rgba(13,17,23,.85);
  --bg-hover:rgba(22,27,34,.95);
  --border:rgba(88,166,255,.15);
  --border-hover:rgba(88,166,255,.4);
  --blue:#58a6ff;
  --green:#7ee787;
  --orange:#f0883e;
  --red:#f85149;
  --purple:#bc8cff;
  --text:#c9d1d9;
  --text-dim:#8b949e;
  --text-bright:#f0f6fc;
  --radius:12px;
  --radius-sm:8px;
  --max-w:1100px;
  --font:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
  --mono:'JetBrains Mono','Fira Code',monospace;
  --transition:all .3s cubic-bezier(.4,0,.2,1);
}
html{font-size:16px;scroll-behavior:smooth}
body{
  font-family:var(--font);
  background:var(--bg);
  color:var(--text);
  line-height:1.6;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
a{color:var(--blue);text-decoration:none;transition:var(--transition)}
a:hover{color:var(--text-bright)}

/* 滚动条 */
::-webkit-scrollbar{width:6px;height:6px}
::-webkit-scrollbar-track{background:transparent}
::-webkit-scrollbar-thumb{background:rgba(88,166,255,.2);border-radius:3px}
::-webkit-scrollbar-thumb:hover{background:rgba(88,166,255,.4)}

/* ---------- 背景装饰 ---------- */
body::before{
  content:'';position:fixed;top:0;left:0;width:100%;height:100%;
  background:
    radial-gradient(ellipse 60% 50% at 20% 0%,rgba(88,166,255,.06),transparent),
    radial-gradient(ellipse 50% 50% at 80% 100%,rgba(188,140,255,.04),transparent);
  pointer-events:none;z-index:0;
}

/* ---------- 布局容器 ---------- */
.container{max-width:var(--max-w);margin:0 auto;padding:0 24px;position:relative;z-index:1}
@media(max-width:640px){.container{padding:0 16px}}

/* ---------- 导航栏 ---------- */
.navbar{
  position:fixed;top:0;left:0;right:0;z-index:100;
  background:rgba(10,14,20,.7);
  backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);
  border-bottom:1px solid var(--border);
  transition:var(--transition);
}
.navbar-inner{
  max-width:var(--max-w);margin:0 auto;padding:0 24px;
  height:60px;display:flex;align-items:center;justify-content:space-between;
}
@media(max-width:640px){.navbar-inner{padding:0 16px}}
.navbar-logo{
  font-size:1.2rem;font-weight:700;color:var(--text-bright);
  display:flex;align-items:center;gap:8px;cursor:pointer;
}
.navbar-logo .logo-icon{font-size:1.4rem}
.navbar-menu{display:flex;gap:4px;align-items:center}
.navbar-link{
  padding:8px 16px;border-radius:var(--radius-sm);color:var(--text-dim);
  font-size:.9rem;font-weight:500;cursor:pointer;transition:var(--transition);
}
.navbar-link:hover,.navbar-link.active{color:var(--blue);background:rgba(88,166,255,.08)}
.navbar-toggle{display:none;background:none;border:none;color:var(--text);cursor:pointer;font-size:1.4rem}
@media(max-width:640px){
  .navbar-toggle{display:block}
  .navbar-menu{
    position:absolute;top:60px;left:0;right:0;flex-direction:column;
    background:rgba(10,14,20,.98);backdrop-filter:blur(20px);
    padding:16px;gap:4px;border-bottom:1px solid var(--border);
    transform:translateY(-200%);opacity:0;transition:var(--transition);pointer-events:none;
  }
  .navbar-menu.open{transform:translateY(0);opacity:1;pointer-events:auto}
  .navbar-menu .navbar-link{padding:12px 16px}
  .navbar-menu .login-btn{margin-top:8px}
}

/* ---------- 按钮 ---------- */
.btn{
  padding:10px 20px;border-radius:var(--radius-sm);font-size:.9rem;font-weight:600;
  cursor:pointer;transition:var(--transition);border:none;display:inline-flex;
  align-items:center;gap:6px;white-space:nowrap;
}
.btn-primary{background:var(--blue);color:#0a0e14}
.btn-primary:hover{background:#79b8ff;box-shadow:0 0 20px rgba(88,166,255,.3)}
.btn-ghost{background:transparent;color:var(--text-dim);border:1px solid var(--border)}
.btn-ghost:hover{color:var(--text);border-color:var(--border-hover)}
.btn-sm{padding:6px 14px;font-size:.8rem}
.login-btn{margin-left:8px}

/* ---------- Hero ---------- */
.hero{
  padding:140px 0 60px;text-align:center;position:relative;
}
.hero h1{
  font-size:clamp(2rem,5vw,3.2rem);font-weight:800;color:var(--text-bright);
  margin-bottom:12px;letter-spacing:-.02em;
  background:linear-gradient(135deg,#f0f6fc,#58a6ff 60%,#bc8cff);
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;
}
.hero p{font-size:clamp(1rem,2.5vw,1.2rem);color:var(--text-dim);max-width:600px;margin:0 auto 28px}
.hero-badge{
  display:inline-flex;align-items:center;gap:6px;padding:6px 16px;
  background:rgba(126,231,135,.08);border:1px solid rgba(126,231,135,.2);
  border-radius:20px;color:var(--green);font-size:.8rem;font-weight:500;margin-bottom:24px;
}
.hero-badge .dot{width:8px;height:8px;background:var(--green);border-radius:50%;animation:pulse 2s infinite}

/* ---------- Agent 摘要条 ---------- */
.agent-strip{
  display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:48px;
}
@media(max-width:640px){.agent-strip{grid-template-columns:1fr}}
.agent-strip-item{
  display:flex;align-items:center;gap:12px;padding:14px 18px;
  background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);
  backdrop-filter:blur(10px);transition:var(--transition);
}
.agent-strip-item:hover{border-color:var(--border-hover);transform:translateY(-2px)}
.agent-strip-icon{font-size:1.5rem}
.agent-strip-info{flex:1;min-width:0}
.agent-strip-name{font-size:.85rem;font-weight:600;color:var(--text-bright)}
.agent-strip-status{font-size:.75rem;color:var(--text-dim);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* ---------- 章节标题 ---------- */
.section{padding:60px 0}
.section-title{
  font-size:1.4rem;font-weight:700;color:var(--text-bright);margin-bottom:6px;
  display:flex;align-items:center;gap:8px;
}
.section-subtitle{font-size:.9rem;color:var(--text-dim);margin-bottom:28px}

/* ---------- 项目网格（核心） ---------- */
.project-grid{
  display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:20px;
}
@media(max-width:640px){.project-grid{grid-template-columns:1fr;gap:16px}}

.project-card{
  background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);
  padding:24px;cursor:pointer;transition:var(--transition);position:relative;overflow:hidden;
  backdrop-filter:blur(10px);
}
.project-card::before{
  content:'';position:absolute;top:0;left:0;right:0;height:2px;
  background:linear-gradient(90deg,transparent,var(--blue),transparent);
  opacity:0;transition:var(--transition);
}
.project-card:hover{
  transform:translateY(-4px);border-color:var(--border-hover);
  box-shadow:0 8px 32px rgba(0,0,0,.3),0 0 0 1px rgba(88,166,255,.15);
}
.project-card:hover::before{opacity:1}
.project-card-head{display:flex;align-items:flex-start;gap:14px;margin-bottom:14px}
.project-card-icon{
  font-size:2rem;width:48px;height:48px;display:flex;align-items:center;justify-content:center;
  background:rgba(88,166,255,.06);border-radius:var(--radius-sm);flex-shrink:0;
}
.project-card-title{flex:1;min-width:0}
.project-card-name{font-size:1.1rem;font-weight:700;color:var(--text-bright)}
.project-card-tagline{font-size:.8rem;color:var(--text-dim);margin-top:2px}
.project-card-desc{font-size:.85rem;color:var(--text-dim);line-height:1.6;margin-bottom:14px}
.project-card-tech{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:14px}
.tech-tag{
  padding:3px 10px;border-radius:20px;font-size:.7rem;font-weight:500;
  background:rgba(88,166,255,.08);color:var(--blue);border:1px solid rgba(88,166,255,.15);
}
.tech-tag:nth-child(2n){background:rgba(188,140,255,.08);color:var(--purple);border-color:rgba(188,140,255,.15)}
.tech-tag:nth-child(3n){background:rgba(126,231,135,.08);color:var(--green);border-color:rgba(126,231,135,.15)}
.project-card-foot{display:flex;align-items:center;justify-content:space-between;padding-top:14px;border-top:1px solid var(--border)}

/* 状态徽章 */
.badge{
  display:inline-flex;align-items:center;gap:5px;padding:3px 12px;
  border-radius:20px;font-size:.72rem;font-weight:600;
}
.badge-running{background:rgba(126,231,135,.1);color:var(--green);border:1px solid rgba(126,231,135,.2)}
.badge-experimental{background:rgba(240,136,62,.1);color:var(--orange);border:1px solid rgba(240,136,62,.2)}
.badge-offline{background:rgba(248,81,73,.1);color:var(--red);border:1px solid rgba(248,81,73,.2)}
.badge .dot{width:7px;height:7px;border-radius:50%}
.badge-running .dot{background:var(--green);animation:pulse 2s infinite}
.badge-experimental .dot{background:var(--orange);animation:pulse 2s infinite}
.badge-offline .dot{background:var(--red)}

.project-card-highlights{font-size:.78rem;color:var(--text-dim);display:flex;align-items:center;gap:4px}

/* ---------- Agent 状态大卡片 ---------- */
.agent-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(340px,1fr));gap:20px}
@media(max-width:640px){.agent-grid{grid-template-columns:1fr;gap:16px}}

.agent-card{
  background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);
  overflow:hidden;backdrop-filter:blur(10px);transition:var(--transition);position:relative;
}
.agent-card:hover{border-color:var(--border-hover);box-shadow:0 8px 32px rgba(0,0,0,.3)}
.agent-card-banner{
  height:6px;
}
.agent-card-body{padding:24px}
.agent-card-head{display:flex;align-items:center;gap:14px;margin-bottom:16px}
.agent-avatar{
  width:56px;height:56px;border-radius:var(--radius);display:flex;
  align-items:center;justify-content:center;font-size:1.8rem;
  border:1px solid var(--border);position:relative;
}
.agent-avatar .status-ring{
  position:absolute;bottom:-2px;right:-2px;width:14px;height:14px;
  border-radius:50%;border:2px solid var(--bg);
}
.agent-avatar .status-ring.online{background:var(--green);animation:pulse 2s infinite}
.agent-avatar .status-ring.standby{background:var(--orange);animation:pulse 2s infinite}
.agent-avatar .status-ring.offline{background:var(--red)}
.agent-card-name{font-size:1.15rem;font-weight:700;color:var(--text-bright)}
.agent-card-personality{font-size:.8rem;color:var(--text-dim)}
.agent-card-detail{
  display:flex;justify-content:space-between;padding:8px 0;
  border-bottom:1px solid rgba(88,166,255,.06);font-size:.82rem;
}
.agent-card-detail:last-child{border-bottom:none}
.agent-card-detail .label{color:var(--text-dim)}
.agent-card-detail .value{color:var(--text-bright);font-family:var(--mono);font-size:.78rem}
.agent-card-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-top:14px;padding-top:14px;border-top:1px solid var(--border)}
.agent-stat{text-align:center;padding:8px;background:rgba(88,166,255,.04);border-radius:var(--radius-sm)}
.agent-stat-num{font-size:1.2rem;font-weight:700;color:var(--blue);font-family:var(--mono)}
.agent-stat-label{font-size:.7rem;color:var(--text-dim);margin-top:2px}
.platform-icons{display:flex;gap:6px;align-items:center}
.platform-icon{font-size:.85rem;padding:2px 8px;background:rgba(88,166,255,.06);border-radius:4px}

/* ---------- 登录页 ---------- */
.login-page{
  min-height:100vh;display:flex;align-items:center;justify-content:center;
  padding:20px;position:relative;z-index:1;
}
.login-card{
  width:100%;max-width:400px;background:var(--bg-card);border:1px solid var(--border);
  border-radius:var(--radius);padding:40px 32px;backdrop-filter:blur(20px);
  box-shadow:0 16px 48px rgba(0,0,0,.4);
}
.login-logo{text-align:center;margin-bottom:28px}
.login-logo .icon{font-size:2.5rem}
.login-logo h2{font-size:1.3rem;font-weight:700;color:var(--text-bright);margin-top:8px}
.login-logo p{font-size:.82rem;color:var(--text-dim);margin-top:4px}
.input-group{margin-bottom:20px}
.input-group label{display:block;font-size:.82rem;color:var(--text-dim);margin-bottom:6px;font-weight:500}
.input-group input{
  width:100%;padding:12px 14px;background:rgba(22,27,34,.6);border:1px solid var(--border);
  border-radius:var(--radius-sm);color:var(--text-bright);font-size:.9rem;font-family:var(--font);
  transition:var(--transition);
}
.input-group input:focus{outline:none;border-color:var(--blue);box-shadow:0 0 0 3px rgba(88,166,255,.1)}
.login-error{color:var(--red);font-size:.8rem;text-align:center;margin-bottom:14px;min-height:1.2em}
.login-btn-full{width:100%;justify-content:center;padding:12px;margin-top:4px}

/* ---------- 项目详情 ---------- */
.detail-back{
  display:inline-flex;align-items:center;gap:6px;color:var(--text-dim);
  font-size:.85rem;cursor:pointer;margin-bottom:24px;transition:var(--transition);
}
.detail-back:hover{color:var(--blue)}
.detail-header{display:flex;align-items:flex-start;gap:20px;margin-bottom:28px;flex-wrap:wrap}
.detail-icon{font-size:3rem;width:72px;height:72px;display:flex;align-items:center;justify-content:center;background:rgba(88,166,255,.06);border-radius:var(--radius)}
.detail-title h1{font-size:2rem;font-weight:800;color:var(--text-bright)}
.detail-title p{color:var(--text-dim);font-size:.95rem;margin-top:4px}
.detail-content{font-size:.92rem;line-height:1.8;color:var(--text)}
.detail-section{margin-bottom:32px}
.detail-section h3{font-size:1rem;color:var(--text-bright);margin-bottom:12px;padding-bottom:8px;border-bottom:1px solid var(--border)}
.detail-highlights{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:10px}
.highlight-item{display:flex;align-items:center;gap:8px;padding:10px 14px;background:rgba(88,166,255,.04);border-radius:var(--radius-sm);font-size:.85rem}
.highlight-item::before{content:'▸';color:var(--blue)}
.timeline{position:relative;padding-left:24px}
.timeline::before{content:'';position:absolute;left:6px;top:4px;bottom:4px;width:2px;background:var(--border)}
.timeline-item{position:relative;padding-bottom:20px}
.timeline-item::before{content:'';position:absolute;left:-22px;top:4px;width:10px;height:10px;background:var(--blue);border-radius:50%;border:2px solid var(--bg)}

/* ---------- 页脚 ---------- */
.footer{
  border-top:1px solid var(--border);padding:32px 0;text-align:center;
  color:var(--text-dim);font-size:.8rem;position:relative;z-index:1;
}
.footer a{color:var(--blue)}

/* ---------- 动画 ---------- */
@keyframes pulse{0%,100%{opacity:1;box-shadow:0 0 0 0 currentColor}50%{opacity:.6;box-shadow:0 0 0 6px transparent}}
@keyframes fadeIn{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}
@keyframes spin{to{transform:rotate(360deg)}}

.fade-enter-active,.fade-leave-active{transition:opacity .25s ease}
.fade-enter-from,.fade-leave-to{opacity:0}

.page-enter-active{animation:fadeIn .4s ease}
.page-leave-active{transition:opacity .15s}

/* 卡片入场动画 (CSS animation，自动触发，不依赖 JS) */
.card-enter{
  animation:cardFadeIn .4s ease forwards;
  opacity:0;
}
@keyframes cardFadeIn{
  from{opacity:0;transform:translateY(16px)}
  to{opacity:1;transform:translateY(0)}
}

/* 骨架屏 */
.skeleton{
  background:linear-gradient(90deg,rgba(88,166,255,.04),rgba(88,166,255,.08),rgba(88,166,255,.04));
  background-size:200% 100%;animation:shimmer 1.5s infinite;border-radius:var(--radius-sm);
}
@keyframes shimmer{0%{background-position:200% 0}100%{background-position:-200% 0}}

/* 加载指示器 */
.loading-spin{
  width:20px;height:20px;border:2px solid rgba(88,166,255,.2);
  border-top-color:var(--blue);border-radius:50%;animation:spin .8s linear infinite;
}

/* Toast */
.toast{
  position:fixed;top:80px;right:24px;z-index:999;
  padding:12px 20px;background:var(--bg-card);border:1px solid var(--border);
  border-radius:var(--radius-sm);color:var(--text);font-size:.85rem;
  backdrop-filter:blur(20px);box-shadow:0 8px 24px rgba(0,0,0,.3);
  animation:fadeIn .3s ease;
}
@media(max-width:640px){.toast{right:16px;left:16px;text-align:center}}

/* ============================================
   ChatWidget 样式
   ============================================ */

/* 悬浮按钮 */
.chat-fab {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), #2563eb);
  border: none;
  cursor: pointer;
  box-shadow: 0 4px 20px rgba(59,130,246,0.4);
  z-index: 9998;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
}
.chat-fab:hover {
  transform: scale(1.1);
  box-shadow: 0 6px 28px rgba(59,130,246,0.5);
}
.chat-fab.hidden { opacity: 0; pointer-events: none; transform: scale(0.5); }
.chat-fab-icon { font-size: 26px; }
.chat-fab-badge {
  position: absolute;
  top: -2px;
  right: -2px;
  background: #ef4444;
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  min-width: 18px;
  height: 18px;
  border-radius: 9px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 4px;
}

/* 聊天面板 */
.chat-panel {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 380px;
  height: 540px;
  background: var(--bg-secondary, #141821);
  border-radius: 16px;
  box-shadow: 0 8px 40px rgba(0,0,0,0.4);
  z-index: 9999;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.08);
}

/* 手机端全屏 */
.chat-panel-fullscreen {
  width: 100% !important;
  height: 100% !important;
  bottom: 0 !important;
  right: 0 !important;
  border-radius: 0 !important;
}

/* 聊天头部 */
.chat-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  background: linear-gradient(135deg, rgba(59,130,246,0.15), rgba(59,130,246,0.05));
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.chat-header-info { display: flex; align-items: center; gap: 10px; }
.chat-header-avatar {
  width: 36px; height: 36px;
  border-radius: 50%;
  background: rgba(59,130,246,0.2);
  display: flex; align-items: center; justify-content: center;
  font-size: 20px;
}
.chat-header-title { font-weight: 600; font-size: 15px; color: var(--text-primary, #e2e8f0); }
.chat-header-status { font-size: 12px; color: var(--text-dim, #64748b); display: flex; align-items: center; gap: 4px; }
.chat-status-dot {
  width: 8px; height: 8px; border-radius: 50%; display: inline-block;
  background: #64748b;
}
.chat-status-dot.online { background: #22c55e; }
.chat-status-dot.thinking { background: #f59e0b; animation: pulse 1s infinite; }
@keyframes pulse { 0%,100%{opacity:1} 50%{opacity:0.4} }

.chat-close-btn {
  background: none; border: none; color: var(--text-dim, #64748b);
  font-size: 18px; cursor: pointer; padding: 4px 8px; border-radius: 6px;
  transition: all 0.2s;
}
.chat-close-btn:hover { background: rgba(255,255,255,0.1); color: var(--text-primary, #e2e8f0); }

/* 消息列表 */
.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  scrollbar-width: thin;
}
.chat-messages::-webkit-scrollbar { width: 4px; }
.chat-messages::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.1); border-radius: 2px; }

/* 欢迎信息 */
.chat-welcome {
  text-align: center;
  padding: 40px 20px;
  color: var(--text-dim, #64748b);
}
.chat-welcome-icon { font-size: 48px; margin-bottom: 12px; }
.chat-welcome p { margin: 4px 0; font-size: 14px; }

/* 消息气泡 */
.chat-msg {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  max-width: 90%;
}
.chat-msg-user { align-self: flex-end; flex-direction: row-reverse; }
.chat-msg-avatar {
  width: 28px; height: 28px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 15px; flex-shrink: 0;
  background: rgba(255,255,255,0.06);
}
.chat-msg-bubble {
  padding: 10px 14px;
  border-radius: 14px;
  font-size: 14px;
  line-height: 1.5;
  word-break: break-word;
}
.chat-msg-assistant .chat-msg-bubble {
  background: rgba(255,255,255,0.06);
  border-top-left-radius: 4px;
  color: var(--text-primary, #e2e8f0);
}
.chat-msg-user .chat-msg-bubble {
  background: linear-gradient(135deg, var(--accent), #2563eb);
  border-top-right-radius: 4px;
  color: #fff;
}

/* 打字动画 */
.chat-typing { display: flex; gap: 4px; align-items: center; }
.chat-typing span {
  width: 8px; height: 8px; border-radius: 50%; background: var(--text-dim, #64748b);
  animation: typing-bounce 1.4s infinite;
}
.chat-typing span:nth-child(2) { animation-delay: 0.2s; }
.chat-typing span:nth-child(3) { animation-delay: 0.4s; }
@keyframes typing-bounce {
  0%,60%,100% { transform: translateY(0); opacity: 0.4; }
  30% { transform: translateY(-6px); opacity: 1; }
}

/* 输入区域 */
.chat-input-area {
  display: flex;
  gap: 8px;
  padding: 12px;
  border-top: 1px solid rgba(255,255,255,0.06);
  background: rgba(0,0,0,0.2);
}
.chat-input {
  flex: 1;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 10px;
  padding: 10px 14px;
  color: var(--text-primary, #e2e8f0);
  font-size: 14px;
  resize: none;
  outline: none;
  font-family: inherit;
  max-height: 100px;
  transition: border-color 0.2s;
}
.chat-input:focus { border-color: var(--accent); }
.chat-input::placeholder { color: var(--text-dim, #64748b); }

.chat-send-btn {
  width: 38px; height: 38px;
  border-radius: 10px;
  border: none;
  background: var(--accent);
  color: #fff;
  font-size: 16px;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: all 0.2s;
  flex-shrink: 0;
}
.chat-send-btn:hover:not(:disabled) { background: #2563eb; }
.chat-send-btn:disabled { opacity: 0.4; cursor: not-allowed; }

/* 过渡动画 */
.chat-slide-enter-active, .chat-slide-leave-active {
  transition: all 0.3s ease;
}
.chat-slide-enter-from, .chat-slide-leave-to {
  opacity: 0;
  transform: translateY(20px) scale(0.95);
}

/* 手机端 */
@media (max-width: 600px) {
  .chat-fab { bottom: 16px; right: 16px; }
}

.chat-wait-text{font-size:.75rem;color:var(--text-dim);margin-top:.5rem;text-align:center}