/* ===== 咨询落地页样式 ===== */
:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --primary-light: #dbeafe;
  --accent: #8b5cf6;
  --bg: #eef2f9;
  --card: #ffffff;
  --text: #1e293b;
  --muted: #64748b;
  --border: #e2e8f0;
  --danger: #ef4444;
  --success: #10b981;
  --radius: 16px;
  --shadow: 0 18px 48px rgba(15, 23, 42, 0.12);
  /* 安全区：适配刘海屏、圆角屏与 home 指示条 */
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
  --safe-left: env(safe-area-inset-left, 0px);
  --safe-right: env(safe-area-inset-right, 0px);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  background: radial-gradient(1200px 600px at 15% -10%, #dbe7ff 0%, transparent 60%),
              radial-gradient(900px 500px at 100% 0%, #ede4ff 0%, transparent 55%),
              var(--bg);
  color: var(--text);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

.page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px 16px;
}

.panel {
  width: 100%;
  max-width: 560px;
  background: var(--card);
  border-radius: 20px;
  box-shadow: var(--shadow);
  border: 1px solid rgba(226, 232, 240, 0.8);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.panel-head {
  text-align: center;
  padding: 26px 24px 14px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  color: #fff;
}

.badge {
  width: 44px;
  height: 44px;
  margin: 0 auto 12px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.22);
  border: 1px solid rgba(255, 255, 255, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  letter-spacing: 0.5px;
}

.panel-head h1 { font-size: 20px; font-weight: 600; }
.welcome { margin-top: 8px; font-size: 13.5px; opacity: 0.92; line-height: 1.6; }

.preset-box {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 16px 20px 4px;
}

.preset-btn {
  border: 1px solid var(--border);
  background: #f8fafc;
  color: var(--text);
  padding: 8px 14px;
  border-radius: 999px;
  font-size: 13px;
  cursor: pointer;
  transition: all 0.18s ease;
}

.preset-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: var(--primary-light);
  transform: translateY(-1px);
}

.chat-box {
  flex: 1;
  min-height: 240px;
  max-height: 52vh;
  overflow-y: auto;
  padding: 16px 20px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.chat-box::-webkit-scrollbar { width: 6px; }
.chat-box::-webkit-scrollbar-thumb { background: #cbd5e1; border-radius: 3px; }

.msg { display: flex; gap: 10px; align-items: flex-start; min-width: 0; }
.msg.user { flex-direction: row-reverse; }

.avatar {
  flex: 0 0 32px;
  height: 32px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
}

.msg.user .avatar { background: #94a3b8; }

.bubble {
  background: #f1f5f9;
  border-radius: 12px;
  padding: 10px 14px;
  font-size: 14px;
  line-height: 1.7;
  max-width: 82%;
  min-width: 0;
  /* pre-line 保留回答里的换行，但折叠 HTML 源码里的缩进空白 */
  white-space: pre-line;
  word-break: break-word;
  overflow-wrap: anywhere;
}

.msg.user .bubble {
  background: var(--primary);
  color: #fff;
  border-bottom-right-radius: 4px;
}

.msg.bot .bubble { border-bottom-left-radius: 4px; }

/* 欢迎语有一层内嵌容器，断行规则要单独补上，避免长句撑破气泡 */
#firstBubble { overflow-wrap: anywhere; word-break: break-word; }

.typing::after {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  margin-left: 2px;
  border-radius: 50%;
  background: var(--muted);
  animation: blink 1.2s infinite;
}

@keyframes blink { 0%, 80%, 100% { opacity: 0.2; } 40% { opacity: 1; } }

.source-box { padding: 0 20px; }

.field-row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }

.field-row label { font-size: 13px; color: var(--muted); }

.field-row input[type="text"],
.field-row textarea,
textarea.kb-input,
input.kb-keywords {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 9px 11px;
  font-size: 13.5px;
  font-family: inherit;
  outline: none;
  background: #fff;
}

.field-row textarea { width: 100%; min-height: 150px; resize: vertical; line-height: 1.7; }

textarea.kb-input { width: 100%; min-height: 90px; resize: vertical; line-height: 1.7; }

input.kb-keywords { width: 260px; padding: 6px 10px; font-size: 12.5px; }

.kb-chunk {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px;
  margin-bottom: 10px;
  background: #f8fafc;
}

.kb-chunk-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
  font-size: 12.5px;
  color: var(--muted);
}

.kb-chunk-actions { display: flex; gap: 8px; margin-top: 8px; }

.hint-box { padding: 0 20px; }

.hint-item {
  font-size: 12px;
  color: var(--muted);
  border-left: 3px solid #f59e0b;
  padding: 4px 10px;
  margin-bottom: 6px;
  background: #fffbeb;
  border-radius: 0 6px 6px 0;
}

.source-item {
  font-size: 12px;
  color: var(--muted);
  border-left: 3px solid var(--primary-light);
  padding: 4px 10px;
  margin-bottom: 6px;
  background: #f8fafc;
  border-radius: 0 6px 6px 0;
}

.input-bar {
  display: flex;
  gap: 10px;
  padding: 14px 20px 6px;
  border-top: 1px solid var(--border);
}

.input-bar input {
  flex: 1;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 11px 14px;
  font-size: 14px;
  outline: none;
  transition: border-color 0.18s ease;
  font-family: inherit;
}

.input-bar input:focus { border-color: var(--primary); }

.send-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  border: none;
  border-radius: 10px;
  padding: 0 18px;
  height: 42px;
  background: var(--primary);
  color: #fff;
  font-size: 14px;
  cursor: pointer;
  transition: background 0.18s ease;
  font-family: inherit;
}

.send-btn:hover { background: var(--primary-dark); }
.send-btn:disabled { background: #94a3b8; cursor: not-allowed; }

.tip {
  text-align: center;
  font-size: 11.5px;
  color: #94a3b8;
  padding: 4px 20px 16px;
}

/* ===== 留资弹窗 ===== */
.modal {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.45);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  z-index: 50;
}

.modal.hidden { display: none; }

.modal-box {
  background: #fff;
  border-radius: 16px;
  padding: 24px;
  width: 100%;
  max-width: 380px;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.modal-box h2 { font-size: 17px; }
.modal-desc { font-size: 13px; color: var(--muted); line-height: 1.6; }

.modal-box input,
.modal-box textarea {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 12px;
  font-size: 14px;
  font-family: inherit;
  outline: none;
  resize: vertical;
}

.modal-box input:focus, .modal-box textarea:focus { border-color: var(--primary); }

.modal-actions { display: flex; gap: 10px; margin-top: 4px; }

.btn {
  flex: 1;
  border-radius: 10px;
  padding: 11px 0;
  font-size: 14px;
  cursor: pointer;
  border: 1px solid transparent;
  font-family: inherit;
}

.btn.primary { background: var(--primary); color: #fff; }
.btn.primary:hover { background: var(--primary-dark); }
.btn.ghost { background: #fff; border-color: var(--border); color: var(--muted); }

.lead-msg { font-size: 12.5px; min-height: 18px; color: var(--muted); }
.lead-msg.ok { color: var(--success); }
.lead-msg.err { color: var(--danger); }

/* ===== 移动端适配 =====
   手机上改为整屏单栏：头部固定、对话区自适应撑满、输入栏吸底，
   同时处理刘海屏安全区与软键盘弹出，避免输入框被遮住。 */
@media (max-width: 640px) {
  body {
    background: var(--bg);
    /* 整页禁止下拉回弹，滚动交给聊天区自己处理 */
    overscroll-behavior: none;
  }

  .page {
    padding: 0 var(--safe-right) 0 var(--safe-left);
    align-items: stretch;
    min-height: 100vh;
    /* dvh 会跟随浏览器地址栏收起/展开而变化，比 vh 更准 */
    min-height: 100dvh;
  }

  .panel {
    max-width: 100%;
    height: 100vh;
    height: 100dvh;
    border-radius: 0;
    border: none;
    box-shadow: none;
    /* 底部给 home 指示条留出空隙 */
    padding-bottom: var(--safe-bottom);
  }

  .panel-head {
    padding: calc(14px + var(--safe-top)) 16px 12px;
  }

  .badge {
    width: 36px;
    height: 36px;
    border-radius: 11px;
    margin-bottom: 8px;
    font-size: 13px;
  }

  .panel-head h1 { font-size: 17px; }
  .welcome { margin-top: 6px; font-size: 13px; line-height: 1.55; }

  /* 快捷问题改成横向滚动，省下竖向空间 */
  .preset-box {
    padding: 12px 12px 2px;
    flex-wrap: nowrap;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }

  .preset-box::-webkit-scrollbar { display: none; }
  .preset-box::after { content: ""; flex: 0 0 4px; }

  .preset-btn {
    flex: 0 0 auto;
    white-space: nowrap;
    padding: 9px 14px;
    font-size: 13.5px;
  }

  /* 对话区自动占满剩余高度，页面不会被顶出去 */
  .chat-box {
    flex: 1 1 auto;
    min-height: 0;
    max-height: none;
    padding: 14px 14px;
    gap: 12px;
    -webkit-overflow-scrolling: touch;
    overscroll-behavior: contain;
  }

  .avatar {
    flex: 0 0 28px;
    height: 28px;
    border-radius: 9px;
    font-size: 11px;
  }

  .bubble {
    max-width: 86%;
    padding: 9px 12px;
    font-size: 15px;
    line-height: 1.65;
  }

  .source-box, .hint-box { padding: 0 14px; }

  /* 输入栏吸底，按钮高度按手指操作调整 */
  .input-bar {
    padding: 10px 12px 4px;
    gap: 8px;
    background: #fff;
  }

  .input-bar input {
    height: 44px;
    /* 小于 16px 时 iOS 会自动放大整页，这里保持 16px */
    font-size: 16px;
    padding: 0 12px;
    border-radius: 22px;
  }

  .send-btn {
    flex: 0 0 auto;
    height: 44px;
    padding: 0 16px;
    border-radius: 22px;
  }

  /* 手机上只保留图标，给输入框腾地方 */
  .send-btn span { display: none; }

  .tip { padding: 4px 14px 12px; font-size: 11px; }

  /* 留资弹窗改成底部抽屉，更符合手机操作习惯 */
  .modal { align-items: flex-end; padding: 0; }

  .modal-box {
    max-width: 100%;
    border-radius: 18px 18px 0 0;
    padding: 20px 16px calc(18px + var(--safe-bottom));
    max-height: 88vh;
    max-height: 88dvh;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
  }

  .modal-box h2 { font-size: 16px; }
  /* 同样避免 iOS 因字号过小自动缩放页面 */
  .modal-box input, .modal-box textarea { font-size: 16px; }
}

/* 手机横屏时高度很矮，压缩头部把空间让给对话区 */
@media (max-height: 460px) and (orientation: landscape) {
  .panel-head { padding: calc(8px + var(--safe-top)) 14px 8px; }
  .badge { display: none; }
  .panel-head h1 { font-size: 15px; }
  .welcome { display: none; }
  .preset-box { padding-top: 8px; }
}

/* ===== 后台管理页面 ===== */
.admin-body { background: #f1f5f9; }

.admin-wrap { max-width: 1080px; margin: 0 auto; padding: 24px 16px 48px; }

.admin-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
  flex-wrap: wrap;
  gap: 12px;
}

.admin-top h1 { font-size: 20px; }

.admin-tabs { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 16px; }

.admin-tab {
  border: 1px solid var(--border);
  background: #fff;
  border-radius: 10px;
  padding: 8px 16px;
  font-size: 14px;
  cursor: pointer;
  color: var(--muted);
  font-family: inherit;
}

.admin-tab.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 12px;
  margin-bottom: 18px;
}

.stat-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 16px;
}

.stat-card .num { font-size: 24px; font-weight: 600; color: var(--primary); }
.stat-card .label { font-size: 12.5px; color: var(--muted); margin-top: 4px; }

.card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 16px;
  margin-bottom: 16px;
  overflow-x: auto;
}

.card h2 { font-size: 15px; margin-bottom: 12px; }

table { width: 100%; border-collapse: collapse; font-size: 13px; }
th, td { padding: 9px 10px; text-align: left; border-bottom: 1px solid var(--border); vertical-align: top; }
th { color: var(--muted); font-weight: 500; background: #f8fafc; white-space: nowrap; }
td.wrap { max-width: 380px; word-break: break-word; }

.tag {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 12px;
  background: var(--primary-light);
  color: var(--primary-dark);
}

.tag.done { background: #dcfce7; color: #15803d; }

.login-box {
  max-width: 360px;
  margin: 14vh auto;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 26px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  box-shadow: var(--shadow);
}

.login-box h2 { font-size: 18px; }

.login-box input,
.upload-area input[type="text"] {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 12px;
  font-size: 14px;
  font-family: inherit;
  outline: none;
}

.login-box input:focus { border-color: var(--primary); }

.toolbar { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; margin-bottom: 12px; }

.upload-area {
  border: 1px dashed #cbd5e1;
  border-radius: 12px;
  padding: 18px;
  text-align: center;
  color: var(--muted);
  font-size: 13px;
}

.hidden { display: none !important; }
.msg-line { font-size: 13px; color: var(--muted); margin-top: 8px; }
.msg-line.ok { color: var(--success); }
.msg-line.err { color: var(--danger); }

/* 后台管理页在手机上的基础适配 */
@media (max-width: 640px) {
  .admin-wrap { padding: 16px 12px 40px; }
  .admin-top { margin-bottom: 12px; gap: 8px; }
  .admin-top h1 { font-size: 17px; }
  .admin-tabs { gap: 6px; margin-bottom: 12px; }
  .admin-tab { padding: 7px 12px; font-size: 13px; }
  .stat-grid { grid-template-columns: repeat(2, 1fr); gap: 8px; margin-bottom: 12px; }
  .stat-card { padding: 12px; }
  .stat-card .num { font-size: 20px; }
  .card { padding: 12px; margin-bottom: 12px; }
  .card h2 { font-size: 14px; }
  table { font-size: 12px; }
  th, td { padding: 8px 6px; }
  td.wrap { max-width: 220px; }
  .login-box { margin: 8vh 12px; padding: 20px; }
  .upload-area { padding: 14px; font-size: 12.5px; }
  .toolbar { gap: 8px; }
}