/* 官网 AI 客服「灵思小芯」：放左下角（右下角是「回到顶部」）；深海蓝 + 电光青，与首屏芯片视觉一致 */
.chatbot{position:fixed;left:28px;bottom:28px;z-index:900;font-size:14px}

/* 启动按钮：芯片图标 + 青色呼吸光环 */
.cb-fab{position:relative;width:64px;height:64px;padding:0;border:1px solid rgba(0,200,255,.45);border-radius:20px;cursor:pointer;
  background:radial-gradient(circle at 50% 35%,#0B3A9E,#04133A 70%);box-shadow:0 14px 36px rgba(4,19,58,.45),0 0 0 1px rgba(255,255,255,.06) inset;transition:.25s}
.cb-fab img{width:38px;height:38px;object-fit:contain;filter:drop-shadow(0 0 8px rgba(0,200,255,.6))}
.cb-fab:hover{transform:translateY(-3px);box-shadow:0 18px 44px rgba(0,80,200,.5),0 0 24px rgba(0,200,255,.35)}
.cb-ring{position:absolute;inset:-6px;border-radius:24px;border:1.5px solid var(--cyan);opacity:0;animation:cb-pulse 2.6s ease-out infinite;pointer-events:none}
@keyframes cb-pulse{0%{opacity:.7;transform:scale(.92)}100%{opacity:0;transform:scale(1.18)}}
.chatbot.open .cb-fab,.chatbot.open .cb-hello{display:none}

/* 招呼气泡：在客服按钮右侧，垂直居中 */
.cb-hello{position:absolute;left:82px;top:50%;translate:0 -50%;width:252px;padding:14px 34px 14px 16px;border-radius:14px;border:1px solid var(--line);
  background:#fff;color:var(--text);box-shadow:0 16px 40px rgba(5,11,28,.22);cursor:pointer;animation:cb-in .3s ease-out}
/* 指向客服按钮的小三角 */
.cb-hello::before{content:"";position:absolute;left:-7px;top:50%;width:12px;height:12px;margin-top:-6px;background:#fff;
  border-left:1px solid var(--line);border-bottom:1px solid var(--line);transform:rotate(45deg)}
.cb-hello[hidden]{display:none}
.cb-hello b{display:block;font-size:15px;color:var(--ink);margin-bottom:4px}
.cb-hello span{font-size:13px;color:var(--sub);line-height:1.6}
.cb-hello-x{position:absolute;top:6px;right:8px;width:22px;height:22px;border:0;background:none;color:var(--mute);font-size:18px;cursor:pointer}

/* 面板 */
.cb-panel{position:absolute;left:0;bottom:0;width:392px;height:min(640px,calc(100vh - 56px));display:flex;flex-direction:column;border-radius:22px;
  background:#fff;color:var(--text);box-shadow:0 28px 72px rgba(5,11,28,.32);overflow:hidden;animation:cb-in .25s ease-out}
.cb-panel[hidden]{display:none}
@keyframes cb-in{from{opacity:0;transform:translateY(14px) scale(.98)}}

.cb-head{position:relative;display:flex;align-items:center;gap:12px;padding:18px 18px 18px 20px;color:#fff;overflow:hidden;
  background:linear-gradient(120deg,#04133A 0%,#0A2A6B 60%,#0050C8 130%)}
.cb-head::before{content:"";position:absolute;inset:0;opacity:.35;pointer-events:none;
  background-image:linear-gradient(rgba(0,200,255,.18) 1px,transparent 1px),linear-gradient(90deg,rgba(0,200,255,.18) 1px,transparent 1px);background-size:18px 18px;
  -webkit-mask-image:linear-gradient(90deg,transparent 30%,#000);mask-image:linear-gradient(90deg,transparent 30%,#000)}
.cb-head::after{content:"";position:absolute;right:-40px;top:-60px;width:180px;height:180px;border-radius:50%;background:radial-gradient(circle,rgba(0,200,255,.35),transparent 65%);pointer-events:none}
.cb-ava{position:relative;z-index:1;flex:none;display:grid;place-items:center;width:42px;height:42px;border-radius:13px;border:1px solid rgba(0,200,255,.4);
  background:radial-gradient(circle at 50% 35%,#0B3A9E,#04133A 75%);box-shadow:0 0 18px rgba(0,200,255,.25)}
.cb-ava img{width:26px;height:26px;object-fit:contain}
.cb-ava.sm{width:30px;height:30px;border-radius:9px;box-shadow:none}
.cb-ava.sm img{width:19px;height:19px}
.cb-title{position:relative;z-index:1;flex:1;display:flex;flex-direction:column;gap:3px}
.cb-title b{font-size:17px;letter-spacing:.04em}
.cb-title small{display:inline-flex;align-items:center;gap:7px;font-size:12px;color:#8FE6FF}
.cb-title small i{width:7px;height:7px;border-radius:50%;background:var(--cyan);box-shadow:0 0 10px var(--cyan)}
.cb-close{position:relative;z-index:1;display:grid;place-items:center;width:34px;height:34px;border:1px solid rgba(255,255,255,.14);border-radius:10px;
  background:rgba(255,255,255,.06);color:#fff;cursor:pointer;transition:.2s}
.cb-close:hover{background:rgba(255,255,255,.16)}

/* 对话区 */
.cb-body{flex:1;overflow-y:auto;padding:18px 16px;display:flex;flex-direction:column;gap:14px;background:var(--bg)}
.cb-welcome{padding:18px;border-radius:16px;background:#fff;border:1px solid var(--line)}
.cb-eyebrow{font-family:var(--en);font-size:11px;font-weight:700;letter-spacing:.16em;color:var(--blue)}
.cb-welcome h4{margin:6px 0 6px;font-size:20px;color:var(--ink);letter-spacing:.04em}
.cb-welcome h4 em{font-style:normal;background:linear-gradient(90deg,var(--blue),var(--cyan));-webkit-background-clip:text;background-clip:text;color:transparent}
.cb-welcome p{font-size:13px;color:var(--sub);line-height:1.7}
.cb-topics{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:14px}
.cb-topics button{display:grid;grid-template-columns:auto 1fr;grid-template-rows:auto auto;column-gap:10px;align-items:center;padding:12px;border:1px solid var(--line);
  border-radius:12px;background:var(--bg);text-align:left;font:inherit;color:var(--text);cursor:pointer;transition:.2s}
.cb-topics button span{grid-row:span 2;display:grid;place-items:center;width:34px;height:34px;border-radius:10px;background:#EAF1FD;color:var(--blue)}
.cb-topics button b{font-size:14px;color:var(--ink)}
.cb-topics button small{font-size:12px;color:var(--mute);white-space:nowrap}
.cb-topics button:hover{border-color:rgba(0,80,200,.35);background:#fff;box-shadow:0 8px 20px rgba(0,80,200,.1);transform:translateY(-1px)}
.cb-topics button:hover span{background:var(--blue);color:#fff}

.cb-row{display:flex;gap:8px;align-items:flex-start}
.cb-row.user{justify-content:flex-end}
.cb-msg{max-width:80%;padding:10px 14px;border-radius:14px;line-height:1.7;white-space:pre-wrap;word-break:break-word}
.cb-row.bot .cb-msg{background:#fff;border:1px solid var(--line);border-top-left-radius:4px;color:var(--text)}
.cb-row.user .cb-msg{background:linear-gradient(135deg,var(--blue),#1A6BE6);color:#fff;border-top-right-radius:4px;box-shadow:0 6px 16px rgba(0,80,200,.22)}
.cb-row.error .cb-msg{color:#B42318;background:#FDECEC;border-color:#F9D0D0}
.cb-row.typing .cb-msg{display:flex;gap:4px;padding:15px 14px}
.cb-row.typing i{width:6px;height:6px;border-radius:50%;background:var(--blue);animation:cb-dot 1s infinite}
.cb-row.typing i:nth-child(2){animation-delay:.15s}.cb-row.typing i:nth-child(3){animation-delay:.3s}
@keyframes cb-dot{0%,60%,100%{opacity:.25;transform:none}30%{opacity:1;transform:translateY(-3px)}}

.cb-chips{display:flex;flex-wrap:wrap;gap:8px;padding:0 16px;background:var(--bg)}
.cb-chips:not(:empty){padding-bottom:12px}
.cb-chips button{padding:6px 12px;border:1px solid #CFE0FA;border-radius:999px;background:#fff;color:var(--blue);font:inherit;font-size:13px;cursor:pointer;transition:.2s}
.cb-chips button:hover{background:var(--blue);border-color:var(--blue);color:#fff}

.cb-input{display:flex;gap:8px;padding:12px 14px 8px;border-top:1px solid var(--line);background:#fff}
.cb-input input{flex:1;min-width:0;padding:11px 16px;border:1px solid var(--line);border-radius:12px;background:var(--bg);font:inherit;color:var(--text);outline:0;transition:.2s}
.cb-input input:focus{border-color:var(--blue);background:#fff;box-shadow:0 0 0 4px rgba(0,80,200,.08)}
.cb-input button{width:44px;height:44px;flex:none;border:0;border-radius:12px;background:linear-gradient(135deg,var(--blue),#1A6BE6);color:#fff;cursor:pointer;display:grid;place-items:center;transition:.2s}
.cb-input button:hover{box-shadow:0 8px 20px rgba(0,80,200,.35)}
.cb-foot{padding:0 14px 10px;background:#fff;font-size:11px;color:var(--mute);text-align:center}

@media (max-width:520px){
  .chatbot{left:16px;bottom:16px}
  .cb-panel{position:fixed;inset:auto 0 0 0;width:auto;height:min(82vh,640px);border-radius:22px 22px 0 0}
}