/* style.css - 吴江AI分身 网站样式 */
* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --primary: #1a56db;
  --primary-dark: #1745a8;
  --bg: #f4f6fa;
  --card: #ffffff;
  --text: #1f2937;
  --text-light: #6b7280;
  --border: #e5e7eb;
  --ai-bubble: #ffffff;
  --user-bubble: #1a56db;
  --radius: 12px;
}

html, body {
  height: 100%;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
}

.app {
  max-width: 760px;
  margin: 0 auto;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--bg);
}

/* 头部 */
.app-header {
  background: linear-gradient(135deg, #1a56db 0%, #3b82f6 100%);
  padding: 22px 20px;
  color: #fff;
}
.brand-name { font-size: 24px; font-weight: 700; letter-spacing: 1px; }
.brand-sub { font-size: 13px; opacity: 0.85; margin-top: 4px; }

/* Tab */
.tab-bar {
  display: flex;
  background: var(--card);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}
.tab-item {
  flex: 1;
  text-align: center;
  padding: 14px 0;
  font-size: 15px;
  color: var(--text-light);
  cursor: pointer;
  border-bottom: 3px solid transparent;
  transition: all .2s;
  user-select: none;
}
.tab-item.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
  font-weight: 600;
}

/* 主区域 */
.main { flex: 1; overflow: hidden; display: flex; }
.panel { display: none; flex: 1; flex-direction: column; height: calc(100vh - 190px); }
.panel.active { display: flex; }

/* 诊断对话 */
.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.msg { display: flex; }
.msg-ai { justify-content: flex-start; }
.msg-user { justify-content: flex-end; }
.msg-bubble {
  max-width: 82%;
  padding: 10px 14px;
  border-radius: var(--radius);
  font-size: 15px;
  line-height: 1.6;
  white-space: pre-wrap;
  word-break: break-word;
}
.msg-ai .msg-bubble {
  background: var(--card);
  border: 1px solid var(--border);
  border-top-left-radius: 4px;
}
.msg-user .msg-bubble {
  background: var(--user-bubble);
  color: #fff;
  border-top-right-radius: 4px;
}

.chat-loading {
  padding: 0 20px 8px;
  font-size: 13px;
  color: var(--text-light);
}
.chat-loading .dot {
  display: inline-block;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--primary);
  margin-right: 3px;
  animation: blink 1.2s infinite;
}
.chat-loading .dot:nth-child(2) { animation-delay: 0.2s; }
.chat-loading .dot:nth-child(3) { animation-delay: 0.4s; }
@keyframes blink { 0%,80%,100% { opacity: 0.2; } 40% { opacity: 1; } }

.chat-input-bar {
  display: flex;
  gap: 10px;
  padding: 12px;
  background: var(--card);
  border-top: 1px solid var(--border);
}
.chat-input {
  flex: 1;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 12px;
  font-size: 15px;
  resize: none;
  outline: none;
  font-family: inherit;
  line-height: 1.5;
}
.chat-input:focus { border-color: var(--primary); }
.btn-primary {
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: 10px;
  padding: 10px 22px;
  font-size: 15px;
  cursor: pointer;
  transition: background .2s;
  white-space: nowrap;
}
.btn-primary:hover { background: var(--primary-dark); }
.btn-primary:disabled { opacity: 0.6; cursor: not-allowed; }

/* 选题工坊 */
#panel-topics, #panel-content { overflow-y: auto; padding: 16px; height: auto; }
.topic-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: flex-end;
  background: var(--card);
  padding: 16px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  margin-bottom: 16px;
}
.select-wrap { display: flex; flex-direction: column; gap: 6px; flex: 1; min-width: 120px; }
.select-wrap label { font-size: 13px; color: var(--text-light); }
.select-wrap select, .form-row select {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 9px 10px;
  font-size: 15px;
  background: #fff;
  outline: none;
  color: var(--text);
}

.topic-list { display: flex; flex-direction: column; gap: 12px; }
.topic-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  cursor: pointer;
  transition: box-shadow .2s, transform .1s;
}
.topic-card:hover { box-shadow: 0 4px 14px rgba(0,0,0,0.08); }
.topic-card:active { transform: scale(0.99); }
.topic-title { font-size: 16px; font-weight: 600; line-height: 1.5; }
.topic-framework {
  margin-top: 6px;
  font-size: 13px;
  color: var(--primary);
  background: #eef4ff;
  display: inline-block;
  padding: 3px 10px;
  border-radius: 20px;
}
.topic-meta { margin-top: 8px; font-size: 13px; color: var(--text-light); display: flex; gap: 12px; }
.topic-tags { margin-top: 8px; display: flex; flex-wrap: wrap; gap: 6px; }
.topic-tag {
  font-size: 12px;
  background: #f0f2f5;
  color: var(--text-light);
  padding: 2px 10px;
  border-radius: 20px;
}
.topic-empty, .empty-hint {
  text-align: center;
  color: var(--text-light);
  padding: 48px 16px;
  font-size: 14px;
  line-height: 1.8;
}
.loading-text {
  text-align: center;
  color: var(--text-light);
  padding: 24px;
  font-size: 14px;
}

/* 文案生成 */
.content-form {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 16px;
}
.form-row { display: flex; flex-direction: column; gap: 6px; }
.form-row label { font-size: 13px; color: var(--text-light); }
.form-row input {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
  font-size: 15px;
  outline: none;
  font-family: inherit;
}
.form-row input:focus { border-color: var(--primary); }

.content-result {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
}
.content-actions { display: flex; justify-content: flex-end; gap: 10px; margin-bottom: 12px; }
.btn-ghost {
  background: #fff;
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 8px;
  padding: 8px 16px;
  font-size: 14px;
  cursor: pointer;
  transition: all .2s;
}
.btn-ghost:hover { border-color: var(--primary); color: var(--primary); }
.content-text {
  white-space: pre-wrap;
  word-break: break-word;
  font-family: inherit;
  font-size: 15px;
  line-height: 1.8;
  max-height: 60vh;
  overflow-y: auto;
}

/* 底部 */
.app-footer {
  background: var(--card);
  border-top: 1px solid var(--border);
  text-align: center;
  padding: 14px;
  font-size: 12px;
  color: var(--text-light);
}
.app-footer p { line-height: 1.7; }
.app-footer a { color: var(--text-light); text-decoration: none; }
.app-footer a:hover { text-decoration: underline; }

@media (max-width: 600px) {
  .brand-name { font-size: 20px; }
  .brand-sub { font-size: 12px; }
  .topic-filter { flex-direction: column; align-items: stretch; }
}