/* ============================================================
   KEFU CHAT — 访客在线客服聊天窗（QQ 对话框风格）
   设计基准：hnjxjyportal 首页封版规范（2026-07-23）
   作用域限定在 .floating-bar 红点与 #kefuChat 容器内，不污染主题
   ============================================================ */

/* ---------- 自包含设计令牌 ----------
   组件出现在多种布局（首页/栏目/个人中心/支付页），其中 default 布局
   （head.jsp→common.css）不加载 shared.css。组件样式不应假设全局表存在，
   故把用到的令牌就地声明并限定在组件范围内——加载了 shared.css 的页面取值
   完全一致（零视觉变化），未加载的页面也能正确渲染。 */
#kefuChat,
.floating-bar {
  --blue-50:  #EBF3FC;
  --blue-100: #D7E7FA;
  --blue-200: #AFCFF5;
  --blue-400: #5C9DE6;
  --blue-500: #3884DC;
  --blue-600: #2E72C2;
  --primary:        var(--blue-500);
  --primary-hover:  var(--blue-600);
  --primary-light:  var(--blue-50);
  --primary-border: var(--blue-200);
  --red:            #C8102E;
  --warning:        #E67E22;
  --warning-light:  #FFF3E0;
  --danger:         #C62828;
  --gray-50:        #F5F6F8;
  --gray-100:       #EBECEF;
  --gray-200:       #D6D8DD;
  --gray-300:       #BFC2C9;
  --gray-400:       #9DA1AB;
  --surface:        #FFFFFF;
  --border:         var(--gray-200);
  --text:           #1A1E24;
  --text-secondary: #4A4F5A;
  --text-muted:     #6B6F7A;
  --radius:    4px;
  --radius-sm: 3px;
  --radius-lg: 6px;
  --shadow-xs: 0 1px 2px rgba(0,0,0,.05), 0 0 0 1px rgba(0,0,0,.02);
  --shadow-lg: 0 4px 16px rgba(0,0,0,.11), 0 8px 24px rgba(0,0,0,.05);
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-xl: 32px;
  --text-xs:   13px;
  --text-sm:   14px;
  --text-base: 16px;
  --transition: 180ms ease;
}

/* ---------- 浮动栏未读红点 ---------- */
.floating-bar a .kefu-dot {
  position: absolute; top: 5px; right: 6px;
  min-width: 18px; height: 18px; padding: 0 5px;
  background: var(--red); color: #fff;
  font-size: var(--text-xs); line-height: 18px; font-weight: 700;
  border-radius: 9px; text-align: center; font-style: normal;
  box-shadow: 0 0 0 2px var(--surface);
  display: none;
}
.floating-bar a .kefu-dot.show { display: block; }

/* ---------- 浮动栏图标（SVG，替代原 emoji） ---------- */
.floating-bar a .fb-icon { display: flex; align-items: center; justify-content: center; height: 24px; }
.floating-bar a .fb-svg { width: 24px; height: 24px; display: block; }
/* 功能图标：线性，与头部购物车图标同规格（stroke 1.8） */
.floating-bar a .fb-line { fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
/* 品牌图标：官方标志 + 品牌色，悬停随按钮反白 */
.floating-bar a .fb-brand { fill: currentColor; width: 22px; height: 22px; }
.floating-bar a .fb-icon.fb-qq { color: #12B7F5; }
.floating-bar a .fb-icon.fb-wechat { color: #07C160; }
.floating-bar a:hover .fb-icon.fb-qq,
.floating-bar a:hover .fb-icon.fb-wechat { color: #fff; }

/* ---------- 容器 ---------- */
#kefuChat {
  position: fixed; right: 84px; bottom: 20px; z-index: 1000;
  width: 380px; height: 580px; max-height: calc(100vh - 40px);
  background: var(--surface);
  border: 1px solid rgba(0,0,0,.06);
  border-radius: var(--radius-lg);
  box-shadow: 0 12px 32px rgba(20,40,80,.16), 0 2px 8px rgba(0,0,0,.06);
  display: none; flex-direction: column; overflow: hidden;
  /* 显式字体栈：避免在 common.css 的 body(Helvetica) 下继承到与主题不一致的字体 */
  font-family: "Microsoft YaHei", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
  font-size: var(--text-sm); color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
#kefuChat.open { display: flex; animation: kefuIn 200ms ease; }
@keyframes kefuIn { from { opacity: 0; transform: translateY(12px) scale(.98); } to { opacity: 1; transform: none; } }

#kefuChat *, #kefuChat *::before, #kefuChat *::after { box-sizing: border-box; }

/* ---------- 头部 ---------- */
.kefu-head {
  flex-shrink: 0; height: 60px; padding: 0 10px 0 var(--spacing-md);
  display: flex; align-items: center; gap: 10px;
  background: linear-gradient(135deg, var(--blue-400) 0%, var(--primary) 55%, var(--blue-600) 100%);
  color: #fff;
}
.kefu-head .kefu-avatar {
  width: 36px; height: 36px; flex-shrink: 0; border-radius: 50%;
  background: rgba(255,255,255,.2);
  box-shadow: inset 0 0 0 1px rgba(255,255,255,.35);
  display: flex; align-items: center; justify-content: center;
  font-size: 20px; line-height: 1; color: #fff;
}
.kefu-head .kefu-head-info { flex: 1; min-width: 0; }
.kefu-head .kefu-title { font-size: var(--text-base); font-weight: 600; line-height: 1.3; letter-spacing: .5px; }
.kefu-head .kefu-status {
  margin-top: 1px; font-size: 12px; opacity: .9; line-height: 1.4;
  display: flex; align-items: center; gap: 5px;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.kefu-head .kefu-status::before {
  content: ''; width: 7px; height: 7px; border-radius: 50%;
  background: #52D68A; flex-shrink: 0;
}
.kefu-head .kefu-status.is-offline::before { background: #FFC266; }
.kefu-head .kefu-status.is-typing::before { background: #fff; animation: kefuBlink 1s infinite; }
@keyframes kefuBlink { 0%,100% { opacity: 1; } 50% { opacity: .25; } }
/* 关闭：两条线绘制的叉号，不依赖字体 */
.kefu-head .kefu-close {
  position: relative; width: 32px; height: 32px; flex-shrink: 0; padding: 0;
  border: 0; background: transparent; border-radius: 50%; cursor: pointer;
  opacity: .85; transition: background var(--transition), opacity var(--transition);
}
.kefu-head .kefu-close::before,
.kefu-head .kefu-close::after {
  content: ''; position: absolute; left: 50%; top: 50%;
  width: 14px; height: 2px; margin: -1px 0 0 -7px;
  background: #fff; border-radius: 1px;
}
.kefu-head .kefu-close::before { transform: rotate(45deg); }
.kefu-head .kefu-close::after  { transform: rotate(-45deg); }
.kefu-head .kefu-close:hover { background: rgba(255,255,255,.18); opacity: 1; }

/* 已识别手机号（登录学员）：头部下方一行轻提示 */
.kefu-phoneid {
  flex-shrink: 0; display: none;
  padding: 5px var(--spacing-md);
  background: var(--primary-light);
  color: var(--text-muted);
  font-size: 12px; line-height: 1.6;
  border-bottom: 1px solid var(--blue-100);
}
.kefu-phoneid.show { display: block; }

/* ---------- 消息区 ---------- */
.kefu-body {
  flex: 1; min-height: 0; overflow-y: auto;
  overflow-anchor: none;   /* 关闭浏览器滚动锚定：向上翻页/图片加载的视口补偿由 JS 负责，避免叠加 */
  padding: 16px 14px 8px;
  background: var(--gray-50);
  scrollbar-width: thin; scrollbar-color: var(--gray-300) transparent;
}
.kefu-body::-webkit-scrollbar { width: 6px; }
.kefu-body::-webkit-scrollbar-thumb { background: var(--gray-300); border-radius: 3px; }
.kefu-body::-webkit-scrollbar-track { background: transparent; }

/* 消息行：头像固定最左/最右，气泡永远贴各自一侧（企业微信风格） */
.kefu-msg { display: flex; align-items: flex-start; gap: 8px; margin-bottom: 14px; }
.kefu-msg .kefu-msg-avatar {
  width: 32px; height: 32px; flex-shrink: 0; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 18px; line-height: 1; user-select: none;
}
.kefu-msg.agent .kefu-msg-avatar { color: #fff; background: linear-gradient(135deg, var(--blue-400), var(--primary)); }
.kefu-msg.me .kefu-msg-avatar { color: var(--text-secondary); background: var(--gray-100); }
/* 同一方连续发言：头像留位不重复显示，间距收紧 */
.kefu-msg.agent + .kefu-msg.agent,
.kefu-msg.me + .kefu-msg.me { margin-top: -8px; }
.kefu-msg.agent + .kefu-msg.agent .kefu-msg-avatar,
.kefu-msg.me + .kefu-msg.me .kefu-msg-avatar { visibility: hidden; }

/* 气泡列：只占内容宽度，另一侧至少留出一个头像位，长消息不会顶满整行 */
.kefu-msg .kefu-msg-col {
  order: 2; flex: 0 1 auto; min-width: 0; max-width: calc(100% - 80px);
  display: flex; flex-direction: column; align-items: flex-start;
}
.kefu-msg.me { flex-direction: row-reverse; }
.kefu-msg.me .kefu-msg-col { order: 1; align-items: flex-end; }

.kefu-msg .kefu-bubble {
  max-width: 100%;
  padding: 9px 12px;
  border-radius: 10px;
  font-size: var(--text-sm);
  line-height: 1.6;
  word-break: break-word; white-space: pre-wrap;
}
.kefu-msg.agent .kefu-bubble {
  background: var(--surface); color: var(--text);
  border-top-left-radius: 2px;
  box-shadow: 0 1px 2px rgba(0,0,0,.06), 0 0 0 1px rgba(0,0,0,.03);
}
.kefu-msg.me .kefu-bubble {
  background: var(--primary); color: #fff;
  border-top-right-radius: 2px;
  box-shadow: 0 1px 2px rgba(56,132,220,.25);
}

/* 系统消息（欢迎语 / 离线提示）：居中浅色说明，无头像 */
.kefu-msg.sys { justify-content: center; }
.kefu-msg.sys .kefu-bubble {
  background: rgba(0,0,0,.045); color: var(--text-muted);
  font-size: 12px; line-height: 1.6; box-shadow: none; padding: 5px 12px;
  border-radius: 6px; max-width: 86%; text-align: center;
}

.kefu-msg .kefu-meta {
  margin-top: 3px; padding: 0 2px; font-size: 12px; line-height: 1.5; color: var(--gray-400);
  display: flex; align-items: center; gap: 6px;
}
.kefu-msg.me .kefu-meta { justify-content: flex-end; }
.kefu-msg .kefu-meta .kefu-fail { color: var(--danger); cursor: pointer; text-decoration: underline; }
/* 终态失败（不可重试）：同色但无可点外观 */
.kefu-msg .kefu-meta .kefu-gone { color: var(--danger); cursor: default; text-decoration: none; }
.kefu-msg .kefu-meta .kefu-sending { color: var(--text-muted); }

/* 空态 */
.kefu-empty { text-align: center; padding: 48px var(--spacing-md) var(--spacing-xl); color: var(--text-muted); }
.kefu-empty .kefu-empty-icon {
  width: 64px; height: 64px; margin: 0 auto 12px; border-radius: 50%;
  background: var(--primary-light); color: var(--primary);
  font-size: 32px; line-height: 1; display: flex; align-items: center; justify-content: center;
}
.kefu-empty .kefu-empty-title { font-size: var(--text-base); font-weight: 600; color: var(--text); margin-bottom: 4px; }
.kefu-empty .kefu-empty-sub { font-size: var(--text-xs); }

/* 加载更早的消息 */
.kefu-earlier { text-align: center; padding: 0 0 12px; }
.kefu-earlier a {
  display: inline-block; padding: 3px 12px;
  font-size: 12px; color: var(--text-muted); text-decoration: none;
  background: var(--surface); border: 1px solid var(--gray-100);
  border-radius: 12px; transition: all var(--transition);
}
.kefu-earlier a:hover { color: var(--primary); border-color: var(--primary-border); background: var(--primary-light); }

/* 对方正在输入：与客服气泡对齐（头像 32 + 间距 8） */
.kefu-typing { display: none; padding: 0 14px 8px 54px; background: var(--gray-50); }
.kefu-typing.show { display: block; }
.kefu-typing .kefu-typing-bubble {
  display: inline-flex; gap: 4px; align-items: center;
  background: var(--surface); border-radius: 10px; border-top-left-radius: 2px;
  padding: 10px 12px;
  box-shadow: 0 1px 2px rgba(0,0,0,.06), 0 0 0 1px rgba(0,0,0,.03);
}
.kefu-typing .kefu-typing-bubble i {
  width: 5px; height: 5px; border-radius: 50%; background: var(--gray-400);
  animation: kefuTyping 1.2s infinite;
}
.kefu-typing .kefu-typing-bubble i:nth-child(2) { animation-delay: .18s; }
.kefu-typing .kefu-typing-bubble i:nth-child(3) { animation-delay: .36s; }
@keyframes kefuTyping { 0%,60%,100% { transform: translateY(0); opacity: .5; } 30% { transform: translateY(-3px); opacity: 1; } }

/* ---------- 手机号留资（离线才显示）：卡片式 ---------- */
/* 白底卡片画在伪元素上：外圈保持消息区灰底，内容层叠其上 */
.kefu-phone { position: relative; flex-shrink: 0; display: none; padding: 10px 24px 20px; background: var(--gray-50); }
.kefu-phone.show { display: block; }
.kefu-phone::before {
  content: ''; position: absolute; top: 0; right: 12px; bottom: 10px; left: 12px;
  background: var(--surface); border-radius: 8px;
  box-shadow: 0 1px 2px rgba(0,0,0,.06), 0 0 0 1px rgba(0,0,0,.03);
}
.kefu-phone > * { position: relative; }
.kefu-phone .kefu-phone-label { margin-bottom: 6px; font-size: var(--text-xs); font-weight: 600; color: var(--text); }
.kefu-phone .kefu-phone-row { display: flex; align-items: center; gap: var(--spacing-sm); }
.kefu-phone .kefu-phone-tip { margin-top: 4px; font-size: 12px; color: var(--text-muted); }
.kefu-phone input[type="tel"] {
  flex: 1; min-width: 0; height: 32px; padding: 0 10px;
  font-family: inherit; font-size: var(--text-sm);
  border: 1px solid var(--border); border-radius: var(--radius);
  outline: none; background: var(--surface); color: var(--text);
  transition: border-color var(--transition), box-shadow var(--transition);
}
.kefu-phone input[type="tel"]:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(56,132,220,.12); }
.kefu-phone input[type="tel"].kefu-invalid { border-color: var(--danger); }
.kefu-phone .kefu-phone-save {
  height: 32px; padding: 0 16px; white-space: nowrap;
  font-family: inherit; font-size: var(--text-xs); font-weight: 500;
  border: 0; border-radius: var(--radius);
  background: var(--primary); color: #fff; cursor: pointer;
  transition: background var(--transition);
}
.kefu-phone .kefu-phone-save:hover { background: var(--primary-hover); }
.kefu-phone .kefu-phone-save:disabled { background: var(--gray-300); cursor: default; }
.kefu-phone .kefu-phone-tip.kefu-error { color: var(--danger); }

/* ---------- 输入区：一体化输入框 ---------- */
.kefu-composer {
  flex-shrink: 0; padding: 10px 12px 12px;
  background: var(--surface); border-top: 1px solid var(--gray-100);
}
.kefu-input-box {
  border: 1px solid var(--border); border-radius: 8px; background: var(--surface);
  transition: border-color var(--transition), box-shadow var(--transition);
}
.kefu-input-box:focus-within { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(56,132,220,.12); }
.kefu-composer textarea {
  display: block; width: 100%; height: 44px; min-height: 44px; max-height: 96px;
  margin: 0; padding: 10px 12px 2px; resize: none; outline: none;
  overflow-y: auto;   /* 覆盖 common.css 全局 textarea{overflow:hidden}，超 4 行可滚动而非被裁 */
  font-family: inherit; font-size: var(--text-sm); line-height: 1.5; color: var(--text);
  border: 0; border-radius: 8px 8px 0 0; background: transparent; box-shadow: none;
}
.kefu-composer textarea::placeholder { color: var(--gray-400); }
.kefu-composer textarea:disabled { cursor: not-allowed; }
.kefu-input-box:has(textarea:disabled) { background: var(--gray-50); }
.kefu-input-bar { display: flex; align-items: center; gap: 6px; padding: 4px 6px 6px 6px; }
#kefuChat .kefu-input-bar .kefu-media-tools { align-self: center; }
#kefuChat .kefu-input-bar .kefu-media-btn { width: 30px; height: 30px; font-size: 19px; color: var(--text-muted); border-radius: 6px; }
#kefuChat .kefu-input-bar .kefu-media-btn:hover { color: var(--primary); background: var(--primary-light); }
.kefu-input-tip {
  flex: 1; min-width: 0; text-align: right; font-size: 12px; color: var(--gray-400);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.kefu-composer .kefu-send {
  height: 30px; min-width: 64px; padding: 0 16px; flex-shrink: 0;
  border: 0; border-radius: 6px;
  background: var(--primary); color: #fff;
  font-family: inherit; font-size: var(--text-xs); font-weight: 500; cursor: pointer;
  transition: background var(--transition), box-shadow var(--transition);
}
.kefu-composer .kefu-send:hover { background: var(--primary-hover); box-shadow: 0 2px 6px rgba(56,132,220,.3); }
.kefu-composer .kefu-send:disabled { background: var(--gray-300); box-shadow: none; cursor: not-allowed; }

/* ---------- 底部其它联系方式 ---------- */
.kefu-foot {
  flex-shrink: 0; padding: 0 12px 10px;
  background: var(--surface);
  font-size: 12px; line-height: 24px; color: var(--gray-400);
  display: flex; align-items: center; gap: 8px; flex-wrap: wrap;
}
.kefu-foot a { color: var(--text-muted); text-decoration: none; }
.kefu-foot a:hover { color: var(--primary); }
.kefu-foot .kefu-foot-sep { color: var(--gray-300); }
/* 结束本次咨询：常驻的红色次级按钮（学员主动结束入口），醒目但不压过发送 */
.kefu-foot .kefu-end {
  margin-left: auto; padding: 0 10px; height: 24px; line-height: 22px; border-radius: 12px;
  color: var(--red); border: 1px solid rgba(200,16,46,.35); background: #fff;
  font-weight: 500;
  transition: background-color var(--transition), color var(--transition), border-color var(--transition);
}
.kefu-foot .kefu-end:hover { background: var(--red); border-color: var(--red); color: #fff; }

/* ---------- 键盘可达 ---------- */
#kefuChat a:focus-visible,
#kefuChat button:focus-visible,
#kefuChat input:focus-visible { outline: 2px solid var(--primary); outline-offset: 1px; }
#kefuChat .kefu-head .kefu-close:focus-visible { outline-color: #fff; }

/* ---------- 移动端自适应 ---------- */
@media (max-width: 640px) {
  #kefuChat {
    right: 0; bottom: 0; left: 0;
    width: 100%; height: 80vh; max-height: none;
    border-radius: 12px 12px 0 0;
    border-left: 0; border-right: 0; border-bottom: 0;
  }
  .kefu-msg .kefu-msg-col { max-width: calc(100% - 56px); }
  .kefu-input-tip { visibility: hidden; }
}

@media (prefers-reduced-motion: reduce) {
  #kefuChat.open { animation: none; }
  .kefu-typing .kefu-typing-bubble i,
  .kefu-head .kefu-status.is-typing::before { animation: none; }
}