.kacb{position: fixed;left: 20px;bottom: 20px;z-index: 9998;--k-primary: var(--primaryColor,#4a7afe);--k-bg: var(--bg2,#ffffff);--k-bg-soft: var(--bg_lighter2,#f3f6fb);--k-border: color-mix(in srgb,var(--k-text) 14%,transparent);--k-text: var(--text,#22314f)}.kacb-fab{width: 60px;height: 60px;border: 0;border-radius: 50%;background: radial-gradient(circle at 30% 30%,color-mix(in srgb,#fff 28%,var(--k-primary)),var(--k-primary));color: #fff;box-shadow: 0 12px 24px color-mix(in srgb,var(--k-primary) 45%,transparent);cursor: pointer;display: grid;place-items: center;transition: transform .2s ease}.kacb-fab:hover{transform: translateY(-2px)}.kacb-fab svg{width: 40px;height: 40px}.kacb-core{animation: kacbPulse 2.1s ease-in-out infinite;transform-origin: center}.kacb-ring{animation: kacbSpin 6s linear infinite;transform-origin: center}@keyframes kacbPulse{0%,100%{transform: scale(1)}50%{transform: scale(1.08)}}@keyframes kacbSpin{from{transform: rotate(0deg)}to{transform: rotate(360deg)}}.kacb-panel{position: absolute;left: 0;bottom: 74px;width: min(390px,calc(100vw - 24px));height: 560px;background: var(--k-bg);border: 0;border-radius: 16px;overflow: hidden;display: none;box-shadow: 0 16px 40px rgba(0,18,51,0.25);transform: translateY(16px);opacity: 0}.kacb-panel.is-open{display: flex;flex-direction: column;animation: kacbFadeInUp .22s ease forwards}.kacb-panel.is-closing{animation: kacbFadeOutDown .22s ease forwards}.kacb-header{background: linear-gradient(135deg,color-mix(in srgb,var(--k-bg-soft) 84%,var(--k-bg)),color-mix(in srgb,var(--k-bg-soft) 65%,var(--k-bg)));color: var(--k-text);padding: 12px 14px;display: flex;justify-content: space-between;align-items: center}.kacb-head-actions{display: flex;gap: 8px}.kacb-close,.kacb-clear{border: 0;background: color-mix(in srgb,var(--k-text) 10%,transparent);color: var(--k-text);border-radius: 8px;width: 30px;height: 30px;cursor: pointer}.kacb-meta{font-size: 12px;color: color-mix(in srgb,var(--k-text) 75%,#667792);padding: 7px 12px;border-bottom: 1px solid color-mix(in srgb,var(--k-border) 75%,transparent)}.kacb-messages{flex: 1;overflow-y: auto;padding: 12px;background: color-mix(in srgb,var(--k-bg-soft) 72%,var(--k-bg))}.kacb-msg{margin-bottom: 10px;display: flex}.kacb-msg.is-user{justify-content: flex-end}.kacb-msg.is-ai{justify-content: flex-start}.kacb-bubble{max-width: 88%;border-radius: 12px;padding: 10px 11px;line-height: 1.7;font-size: 13px}.kacb-bubble p{margin: 0 0 8px 0}.kacb-bubble p:last-child{margin-bottom: 0}.kacb-bubble ul{margin: 6px 0;padding-right: 18px}.kacb-msg.is-user .kacb-bubble{background: var(--k-primary);color: #fff}.kacb-msg.is-ai .kacb-bubble{background: var(--k-bg);color: var(--k-text);border: 0}.kacb-time{display: block;margin-top: 6px;font-size: 11px;opacity: .75}.kacb-form{border-top: 1px solid color-mix(in srgb,var(--k-border) 70%,transparent);padding: 10px;display: flex;gap: 8px;background: var(--k-bg)}.kacb-form.is-loading{opacity: .7}#kacb-input{flex: 1;resize: none;border: 0;outline: none;border-radius: 10px;padding: 8px 10px;font-size: 13px;background: var(--k-bg-soft);color: var(--k-text);transition: box-shadow .2s ease,background-color .2s ease}#kacb-input:focus{outline: none;background: color-mix(in srgb,var(--k-bg) 78%,var(--k-bg-soft));box-shadow: 0 0 0 2px color-mix(in srgb,var(--k-primary) 22%,transparent),0 8px 20px color-mix(in srgb,var(--k-primary) 12%,transparent)}#kacb-send{border: 0;border-radius: 10px;background: var(--k-primary);color: #fff;padding: 0 16px;cursor: pointer}.kacb-dots{display: inline-flex;gap: 4px}.kacb-dots i{width: 7px;height: 7px;border-radius: 50%;background: color-mix(in srgb,var(--k-primary) 80%,#fff);animation: kacbDots 1s ease-in-out infinite}.kacb-dots i:nth-child(2){animation-delay: .15s}.kacb-dots i:nth-child(3){animation-delay: .3s}@keyframes kacbDots{0%,80%,100%{transform: translateY(0);opacity: .45}40%{transform: translateY(-4px);opacity: 1}}.kacb-skeleton-wrap{padding: 6px 0}.kacb-skeleton{height: 14px;border-radius: 999px;margin-bottom: 10px;background: linear-gradient( 90deg,color-mix(in srgb,var(--k-bg) 75%,#e7edf8) 25%,color-mix(in srgb,var(--k-bg) 40%,#f7faff) 50%,color-mix(in srgb,var(--k-bg) 75%,#e7edf8) 75% );background-size: 220% 100%;animation: kacbSkeleton 1.15s ease-in-out infinite}.kacb-skeleton.sk-1{width: 78%}.kacb-skeleton.sk-2{width: 92%}.kacb-skeleton.sk-3{width: 66%}@keyframes kacbSkeleton{0%{background-position: 100% 0}100%{background-position: -100% 0}}@keyframes kacbFadeInUp{from{opacity: 0;transform: translateY(16px)}to{opacity: 1;transform: translateY(0)}}@keyframes kacbFadeOutDown{from{opacity: 1;transform: translateY(0)}to{opacity: 0;transform: translateY(16px)}}.kacb-vip-lock{background: var(--k-bg);border-radius: 12px;padding: 16px;text-align: center;box-shadow: 0 10px 26px rgba(0,0,0,0.08)}.kacb-vip-text{margin: 0 0 10px;color: var(--k-text)}.kacb-vip-btn{display: inline-block;text-decoration: none;padding: 9px 14px;border-radius: 10px;color: #fff;background: var(--k-primary)}@media (max-width: 600px){.kacb{left: 12px;bottom: 12px}.kacb-panel{width: calc(100vw - 24px);height: 72vh}}