*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
.cs-widget{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI','PingFang SC','Hiragino Sans GB','Microsoft YaHei',sans-serif;font-size:14px;line-height:1.5;color:#333;position:fixed;bottom:24px;right:24px;z-index:2147483647;width:400px;max-height:calc(100vh - 48px);display:flex;flex-direction:column;border-radius:16px;overflow:hidden;box-shadow:0 12px 48px rgba(0,0,0,0.15);transition:all .35s cubic-bezier(.4,0,.2,1);background:#fff}
.cs-widget.cs-widget--closed{transform:scale(0);opacity:0;pointer-events:none;transform-origin:bottom right}
.cs-widget.cs-widget--minimized{width:64px;height:64px;border-radius:50%;cursor:pointer;bottom:24px;right:24px;overflow:hidden;box-shadow:0 6px 24px rgba(0,0,0,0.2)}
.cs-widget.cs-widget--minimized .cs-chat>*{display:none!important}
.cs-widget.cs-widget--minimized::after{content:'';position:absolute;inset:0;background:linear-gradient(135deg,var(--primary),var(--primary-dark));border-radius:50%}
.cs-fab{display:none;position:fixed;bottom:24px;right:24px;width:64px;height:64px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--primary-dark));color:#fff;border:none;cursor:pointer;box-shadow:0 6px 24px rgba(0,0,0,0.25);z-index:2147483646;transition:transform .3s,box-shadow .3s;align-items:center;justify-content:center}
.cs-fab:hover{transform:scale(1.08);box-shadow:0 8px 32px rgba(0,0,0,0.3)}
.cs-fab svg{width:28px;height:28px}
.cs-widget.cs-widget--closed~.cs-fab{display:flex}

.cs-chat{display:flex;flex-direction:column;height:calc(100vh - 48px);max-height:600px;min-height:500px}

.cs-chat__header{background:linear-gradient(135deg,var(--primary),var(--primary-dark));color:#fff;padding:16px 20px;display:flex;align-items:center;justify-content:space-between;flex-shrink:0}
.cs-chat__header-left{display:flex;align-items:center;gap:12px}
.cs-avatar{width:40px;height:40px;border-radius:50%;background:rgba(255,255,255,0.2);display:flex;align-items:center;justify-content:center;overflow:hidden;flex-shrink:0}
.cs-avatar--sm{width:32px;height:32px}
.cs-avatar svg{width:20px;height:20px;color:#fff}
.cs-chat__header-info{display:flex;flex-direction:column}
.cs-chat__title{font-weight:600;font-size:15px}
.cs-chat__status{font-size:12px;opacity:.85;display:flex;align-items:center;gap:4px}
.cs-dot{width:6px;height:6px;border-radius:50%;background:#4ade80;display:inline-block;animation:cs-pulse 2s infinite}
.cs-dot.cs-dot--offline{background:#94a3b8;animation:none}
@keyframes cs-pulse{0%,100%{opacity:1}50%{opacity:.4}}
.cs-btn-icon{background:none;border:none;color:inherit;cursor:pointer;padding:8px;border-radius:8px;transition:background .2s;display:flex;align-items:center;justify-content:center}
.cs-btn-icon:hover{background:rgba(255,255,255,0.15)}
.cs-btn-icon svg{width:18px;height:18px}

.cs-chat__body{flex:1;overflow-y:auto;padding:16px;display:flex;flex-direction:column;gap:4px;scroll-behavior:smooth;background:#f8fafc}
.cs-chat__body::-webkit-scrollbar{width:4px}
.cs-chat__body::-webkit-scrollbar-thumb{background:#d1d5db;border-radius:4px}

.cs-loading{display:flex;justify-content:center;padding:40px}
.cs-spinner{width:32px;height:32px;border:3px solid #e2e8f0;border-top-color:var(--primary);border-radius:50%;animation:cs-spin .8s linear infinite}
@keyframes cs-spin{to{transform:rotate(360deg)}}

.cs-msg{display:flex;gap:8px;max-width:85%;animation:cs-fadeIn .3s ease}
.cs-msg--visitor{align-self:flex-end;flex-direction:row-reverse}
.cs-msg--admin,.cs-msg--system{align-self:flex-start}
.cs-msg--system{max-width:100%;align-self:center}
.cs-msg__avatar{width:32px;height:32px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--primary-dark));display:flex;align-items:center;justify-content:center;flex-shrink:0;color:#fff;font-size:13px;font-weight:600}
.cs-msg--visitor .cs-msg__avatar{background:linear-gradient(135deg,#6366f1,#8b5cf6)}
.cs-msg__bubble{padding:10px 16px;border-radius:16px;word-break:break-word;position:relative;line-height:1.6}
.cs-msg--visitor .cs-msg__bubble{background:linear-gradient(135deg,var(--primary),var(--primary-dark));color:#fff;border-bottom-right-radius:4px}
.cs-msg--admin .cs-msg__bubble{background:#fff;color:#333;border-bottom-left-radius:4px;box-shadow:0 1px 3px rgba(0,0,0,0.06)}
.cs-msg--system .cs-msg__bubble{background:transparent;color:#94a3b8;font-size:12px;padding:4px 0;text-align:center;max-width:100%}
.cs-msg__time{font-size:11px;color:#94a3b8;margin-top:4px;padding:0 4px}
.cs-msg--visitor .cs-msg__time{text-align:right;color:rgba(255,255,255,0.6)}
.cs-msg__file{display:flex;align-items:center;gap:10px;padding:10px 14px;background:rgba(0,0,0,0.04);border-radius:10px;margin-top:6px;cursor:pointer;text-decoration:none;color:inherit;transition:background .2s}
.cs-msg__file:hover{background:rgba(0,0,0,0.08)}
.cs-msg--visitor .cs-msg__file{background:rgba(255,255,255,0.15)}
.cs-msg--visitor .cs-msg__file:hover{background:rgba(255,255,255,0.25)}
.cs-msg__file-icon{width:36px;height:36px;border-radius:8px;background:var(--primary);color:#fff;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.cs-msg--visitor .cs-msg__file-icon{background:rgba(255,255,255,0.25)}
.cs-msg__file-icon svg{width:18px;height:18px}
.cs-msg__file-info{flex:1;min-width:0}
.cs-msg__file-name{font-size:13px;font-weight:500;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.cs-msg__file-size{font-size:11px;opacity:.7}
.cs-msg__image{max-width:240px;border-radius:10px;cursor:pointer;transition:transform .2s;display:block;margin-top:4px}
.cs-msg__image:hover{transform:scale(1.02)}
.cs-msg__video{max-width:280px;border-radius:10px;margin-top:4px;display:block;background:#000}
.cs-msg--visitor .cs-msg__video{border:2px solid rgba(255,255,255,0.2)}
.cs-msg__emoji{font-size:32px;line-height:1.2}
.cs-msg--visitor .cs-msg__image{border:2px solid rgba(255,255,255,0.2)}

@keyframes cs-fadeIn{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}

.cs-chat__info-form,.cs-chat__offline-form{position:absolute;inset:0;background:#fff;z-index:10;display:flex;align-items:center;justify-content:center;padding:24px}
.cs-info-form__inner{width:100%;max-width:320px}
.cs-info-form__inner h3{font-size:20px;font-weight:700;margin-bottom:6px;color:#1a1a2e}
.cs-info-form__inner p{color:#64748b;margin-bottom:20px;font-size:14px}
.cs-form-group{margin-bottom:14px}
.cs-form-group label{display:block;font-size:13px;font-weight:500;color:#475569;margin-bottom:4px}
.cs-form-group input,.cs-form-group textarea{width:100%;padding:10px 14px;border:1.5px solid #e2e8f0;border-radius:10px;font-size:14px;outline:none;transition:border-color .2s,box-shadow .2s;background:#f8fafc;font-family:inherit}
.cs-form-group input:focus,.cs-form-group textarea:focus{border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-light);background:#fff}
.cs-btn{padding:10px 24px;border:none;border-radius:10px;font-size:14px;font-weight:600;cursor:pointer;transition:all .2s;font-family:inherit}
.cs-btn--primary{background:linear-gradient(135deg,var(--primary),var(--primary-dark));color:#fff;box-shadow:0 4px 12px rgba(79,70,229,0.3)}
.cs-btn--primary:hover{box-shadow:0 6px 20px rgba(79,70,229,0.4);transform:translateY(-1px)}
.cs-btn--block{width:100%;display:block}
.cs-btn--sm{padding:6px 14px;font-size:12px;border-radius:8px}
.cs-btn--outline{background:transparent;border:1.5px solid #e2e8f0;color:#475569}
.cs-btn--outline:hover{border-color:var(--primary);color:var(--primary)}

.cs-chat__toolbar{display:flex;align-items:center;justify-content:space-between;padding:6px 12px;background:#fff;border-top:1px solid #f1f5f9;flex-shrink:0}
.cs-toolbar__left{display:flex;gap:2px}
.cs-toolbar__left .cs-btn-icon{color:#64748b;padding:6px}
.cs-toolbar__left .cs-btn-icon:hover{background:#f1f5f9;color:var(--primary)}
.cs-char-count{font-size:11px;color:#94a3b8}

.cs-emoji-panel{position:absolute;bottom:60px;left:0;right:0;background:#fff;border-top:1px solid #e2e8f0;padding:12px;max-height:200px;overflow-y:auto;z-index:20;display:grid;grid-template-columns:repeat(8,1fr);gap:4px}
.cs-emoji-item{width:100%;aspect-ratio:1;display:flex;align-items:center;justify-content:center;font-size:22px;border-radius:8px;cursor:pointer;transition:background .15s;border:none;background:none}
.cs-emoji-item:hover{background:#f1f5f9}
.cs-chat__offline-tip{text-align:center;color:#94a3b8;font-size:12px;padding:10px 16px;background:#fef3c7;border-radius:8px;margin:8px 0;border:1px solid #fde68a}

.cs-chat__footer{display:flex;align-items:flex-end;gap:8px;padding:12px 16px;background:#fff;border-top:1px solid #f1f5f9;flex-shrink:0}
.cs-input-wrap{flex:1;position:relative}
.cs-input-wrap textarea{width:100%;padding:10px 14px;border:1.5px solid #e2e8f0;border-radius:12px;font-size:14px;outline:none;resize:none;min-height:42px;max-height:120px;line-height:1.5;font-family:inherit;transition:border-color .2s,box-shadow .2s}
.cs-input-wrap textarea:focus{border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-light)}
.cs-send-btn{width:42px;height:42px;padding:0;display:flex;align-items:center;justify-content:center;border-radius:50%!important;flex-shrink:0}
.cs-send-btn svg{width:18px;height:18px}

@media(max-width:480px){
    .cs-widget{width:100%;height:100%;max-height:100%;bottom:0;right:0;border-radius:0;position:fixed!important}
    .cs-chat{height:100%;max-height:100%;min-height:100%}
    .cs-fab{bottom:16px;right:16px}
}