/* ============================================================
   在线客服组件 · 万达金属 / 壹阳金属
   零依赖纯前端，配合 assets/js/chat.js 使用
   ============================================================ */
:root {
  --kf-green: #0B6B4F;
  --kf-green-d: #0A4C39;
  --kf-ink: #16241F;
  --kf-sub: #66766F;
  --kf-line: #DDE7E2;
  --kf-bg: #F4F8F6;
  --kf-white: #FFFFFF;
}

/* ---------- 左下角入口 ---------- */
.kf-launcher {
  position: fixed;
  left: 22px;
  bottom: 22px;
  z-index: 120;
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 11px 17px 11px 13px;
  border: none;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--kf-green), var(--kf-green-d));
  color: #fff;
  font: 600 14.5px/1.2 -apple-system, "Segoe UI", "Microsoft YaHei", sans-serif;
  cursor: pointer;
  box-shadow: 0 12px 30px -8px rgba(10, 60, 40, .55);
  transition: transform .25s cubic-bezier(.2,.8,.3,1), box-shadow .25s;
}
.kf-launcher:hover { transform: translateY(-3px); box-shadow: 0 18px 38px -10px rgba(10,60,40,.65); }
.kf-launcher:focus-visible { outline: 3px solid #7CC9A6; outline-offset: 3px; }
.kf-launcher svg { width: 21px; height: 21px; flex: 0 0 auto; }
.kf-launcher .kf-live {
  position: absolute;
  top: -3px; right: 8px;
  width: 11px; height: 11px;
  border-radius: 50%;
  background: #37D67A;
  border: 2px solid #fff;
  box-sizing: content-box;
}
.kf-launcher.is-off .kf-live { background: #B6C2BC; }
.kf-launcher.is-open { transform: scale(.94); }

/* 呼吸光环 */
.kf-launcher::before {
  content: "";
  position: absolute;
  inset: -6px;
  border-radius: 999px;
  border: 1px solid rgba(11,107,79,.35);
  animation: kf-pulse 2.6s ease-out infinite;
  pointer-events: none;
}
@keyframes kf-pulse {
  0%   { transform: scale(.94); opacity: .7; }
  70%  { transform: scale(1.12); opacity: 0; }
  100% { transform: scale(1.12); opacity: 0; }
}

/* ---------- 首次欢迎气泡 ---------- */
.kf-bubble {
  position: fixed;
  left: 22px;
  bottom: 82px;
  z-index: 119;
  max-width: 260px;
  padding: 10px 14px;
  border-radius: 12px 12px 12px 3px;
  background: var(--kf-white);
  border: 1px solid var(--kf-line);
  color: var(--kf-ink);
  font: 13.5px/1.6 -apple-system, "Segoe UI", "Microsoft YaHei", sans-serif;
  box-shadow: 0 10px 26px -10px rgba(15,45,32,.35);
  animation: kf-in .3s ease both;
  cursor: pointer;
}
.kf-bubble[hidden] { display: none; }

/* ---------- 面板 ---------- */
.kf-panel {
  position: fixed;
  left: 22px;
  bottom: 82px;
  z-index: 121;
  width: 360px;
  max-width: calc(100vw - 24px);
  height: 540px;
  max-height: calc(100vh - 108px);
  display: flex;
  flex-direction: column;
  background: var(--kf-white);
  border: 1px solid var(--kf-line);
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 24px 64px -16px rgba(10,40,28,.42);
  font: 14px/1.65 -apple-system, "Segoe UI", "Microsoft YaHei", sans-serif;
  color: var(--kf-ink);
  animation: kf-in .26s cubic-bezier(.2,.8,.3,1) both;
}
.kf-panel[hidden] { display: none; }
@keyframes kf-in {
  from { opacity: 0; transform: translateY(14px) scale(.98); }
  to   { opacity: 1; transform: none; }
}

.kf-head {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 13px 15px;
  background: linear-gradient(135deg, var(--kf-green), var(--kf-green-d));
  color: #fff;
}
.kf-avatar {
  width: 36px; height: 36px;
  flex: 0 0 auto;
  display: grid; place-items: center;
  border-radius: 50%;
  background: rgba(255,255,255,.16);
  border: 1px solid rgba(255,255,255,.3);
  font-weight: 700; font-size: 15px;
}
.kf-head-txt { flex: 1 1 auto; min-width: 0; }
.kf-head-txt b { display: block; font-size: 14.5px; font-weight: 650; }
.kf-head-txt small { display: flex; align-items: center; gap: 6px; font-size: 11.5px; opacity: .88; }
.kf-head-txt small i {
  width: 7px; height: 7px; border-radius: 50%;
  background: #4BE08B; display: inline-block;
}
.kf-head.is-off .kf-head-txt small i { background: #C9D4CE; }
.kf-close {
  flex: 0 0 auto;
  width: 30px; height: 30px;
  border: 0; border-radius: 8px;
  background: rgba(255,255,255,.14);
  color: #fff; font-size: 19px; line-height: 1;
  cursor: pointer;
}
.kf-close:hover { background: rgba(255,255,255,.28); }

/* ---------- 对话区 ---------- */
.kf-log {
  flex: 1 1 auto;
  overflow-y: auto;
  padding: 16px 14px 10px;
  background: var(--kf-bg);
  scrollbar-width: thin;
}
.kf-msg { display: flex; margin-bottom: 12px; gap: 8px; }
.kf-msg.me { flex-direction: row-reverse; }
.kf-msg .bubble {
  max-width: 82%;
  padding: 9px 12px;
  border-radius: 12px 12px 12px 3px;
  background: var(--kf-white);
  border: 1px solid var(--kf-line);
  font-size: 13.3px;
  line-height: 1.7;
  white-space: pre-wrap;
  word-break: break-word;
}
.kf-msg.me .bubble {
  border-radius: 12px 12px 3px 12px;
  background: var(--kf-green);
  border-color: var(--kf-green);
  color: #fff;
}
.kf-msg .bubble a { color: var(--kf-green); font-weight: 600; }
.kf-msg.me .bubble a { color: #fff; }
.kf-msg .bubble .kf-links { margin-top: 7px; padding-top: 7px; border-top: 1px dashed var(--kf-line); }
.kf-msg .bubble .kf-links a { display: inline-block; margin-right: 10px; font-size: 12.5px; }

/* ---------- 快捷问题 ---------- */
.kf-quick {
  flex: 0 0 auto;
  display: flex; flex-wrap: wrap; gap: 6px;
  padding: 9px 14px 11px;
  background: var(--kf-bg);
  border-top: 1px solid var(--kf-line);
}
.kf-quick button {
  padding: 6px 11px;
  border: 1px solid #BFD8CC;
  border-radius: 999px;
  background: #fff;
  color: var(--kf-green);
  font-size: 12.3px;
  cursor: pointer;
  transition: background .18s, border-color .18s;
}
.kf-quick button:hover { background: #E8F5EF; border-color: var(--kf-green); }

/* ---------- 底部工具 / 输入 ---------- */
.kf-foot {
  flex: 0 0 auto;
  border-top: 1px solid var(--kf-line);
  background: #fff;
  padding: 9px 12px 11px;
}
.kf-channels { display: flex; gap: 6px; margin-bottom: 8px; }
.kf-channels a, .kf-channels button {
  flex: 1 1 0;
  display: inline-flex; align-items: center; justify-content: center; gap: 5px;
  padding: 7px 4px;
  border: 1px solid var(--kf-line);
  border-radius: 9px;
  background: #F8FBF9;
  color: var(--kf-ink);
  font-size: 12.2px;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
}
.kf-channels a:hover, .kf-channels button:hover { border-color: var(--kf-green); color: var(--kf-green); }
.kf-channels svg { width: 14px; height: 14px; }
.kf-input { display: flex; gap: 7px; }
.kf-input input {
  flex: 1 1 auto; min-width: 0;
  padding: 9px 11px;
  border: 1px solid var(--kf-line);
  border-radius: 9px;
  font: 13.3px/1.4 inherit;
  color: var(--kf-ink);
  outline: none;
}
.kf-input input:focus { border-color: var(--kf-green); box-shadow: 0 0 0 2px rgba(11,107,79,.12); }
.kf-input button {
  flex: 0 0 auto;
  padding: 0 14px;
  border: 0; border-radius: 9px;
  background: var(--kf-green); color: #fff;
  font-size: 13px; font-weight: 650;
  cursor: pointer;
}
.kf-input button:hover { background: var(--kf-green-d); }
.kf-note { margin: 7px 0 0; font-size: 11.5px; color: var(--kf-sub); text-align: center; }

/* ---------- 留言表单 ---------- */
.kf-form { padding: 12px 14px 14px; background: #fff; }
.kf-form[hidden] { display: none; }
.kf-form h4 { margin: 0 0 9px; font-size: 13.5px; color: var(--kf-green); }
.kf-form label { display: block; margin-bottom: 7px; font-size: 12.3px; color: var(--kf-sub); }
.kf-form input, .kf-form textarea {
  display: block; width: 100%;
  margin-top: 3px; padding: 8px 10px;
  border: 1px solid var(--kf-line); border-radius: 8px;
  font: 13.2px/1.5 inherit; color: var(--kf-ink);
  outline: none; resize: vertical;
}
.kf-form input:focus, .kf-form textarea:focus { border-color: var(--kf-green); }
.kf-form-actions { display: flex; gap: 8px; margin-top: 10px; }
.kf-form-actions button {
  flex: 1 1 0; padding: 9px;
  border: 0; border-radius: 8px;
  font-size: 13px; font-weight: 650; cursor: pointer;
}
.kf-form-actions .primary { background: var(--kf-green); color: #fff; }
.kf-form-actions .ghost { background: #F1F5F3; color: var(--kf-ink); }
.kf-form-tip { margin-top: 8px; font-size: 12px; min-height: 17px; }
.kf-form-tip.ok { color: var(--kf-green); }
.kf-form-tip.err { color: #B42318; }
.kf-form-tip a { color: var(--kf-green); font-weight: 650; }

/* ---------- 移动端 ---------- */
@media (max-width: 640px) {
  .kf-launcher { left: 14px; bottom: 14px; padding: 10px 14px 10px 11px; font-size: 13.5px; }
  .kf-launcher .kf-label { display: none; }
  .kf-bubble { left: 14px; bottom: 72px; max-width: 210px; font-size: 12.5px; }
  .kf-panel {
    left: 12px; right: 12px; bottom: 72px;
    width: auto; max-width: none;
    height: min(520px, calc(100vh - 92px));
    max-height: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .kf-launcher::before { animation: none; display: none; }
  .kf-panel, .kf-bubble { animation: none; }
  .kf-launcher, .kf-quick button { transition: none; }
}