/* ═══════════════════════════════════════════════
   倪海厦中医课程 Web 平台 - 样式表
   中国风 + 现代简洁，移动优先响应式
   ═══════════════════════════════════════════════ */

:root {
  --color-ink: #2c2c2c;
  --color-ink-light: #555;
  --color-cinnabar: #c0392b;
  --color-cinnabar-dark: #a5281b;
  --color-paper: #faf8f5;
  --color-paper-warm: #f5f0e8;
  --color-jade: #6b8e6b;
  --color-gold: #c4a35a;
  --color-border: #e0d8cc;
  --color-card: #ffffff;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
  --radius: 12px;
  --max-width: 960px;
  --nav-height: 56px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
  background: var(--color-paper);
  color: var(--color-ink);
  line-height: 1.8;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5 {
  font-family: 'Songti SC', 'SimSun', 'PingFang SC', 'Microsoft YaHei', serif;
  font-weight: 700;
  line-height: 1.4;
}

a { color: var(--color-cinnabar); text-decoration: none; transition: color .2s; }
a:hover { color: var(--color-cinnabar-dark); }

/* ── 导航栏 ──────────────────────────── */
.navbar {
  position: fixed; top: 0; left: 0; right: 0;
  height: var(--nav-height);
  background: var(--color-ink);
  color: #fff;
  display: flex; align-items: center;
  padding: 0 16px;
  z-index: 100;
  box-shadow: 0 2px 8px rgba(0,0,0,0.15);
}
.navbar .brand {
  font-family: 'Songti SC', 'SimSun', serif;
  font-size: 18px; font-weight: 700;
  color: #fff; white-space: nowrap;
  display: flex; align-items: center; gap: 6px;
}
.navbar .brand .seal {
  display: inline-block; width: 28px; height: 28px;
  background: var(--color-cinnabar); border-radius: 4px;
  text-align: center; line-height: 28px; font-size: 16px;
}
.navbar .nav-links {
  display: flex; gap: 4px; margin-left: 24px;
}
.navbar .nav-links a {
  color: rgba(255,255,255,0.7); font-size: 14px;
  padding: 6px 12px; border-radius: 6px; transition: all .2s;
}
.navbar .nav-links a:hover, .navbar .nav-links a.active {
  color: #fff; background: rgba(255,255,255,0.1);
}
.navbar .nav-search {
  margin-left: auto; position: relative;
}
.navbar .nav-search input {
  width: 180px; height: 34px;
  border: none; border-radius: 17px;
  padding: 0 36px 0 14px; font-size: 13px;
  background: rgba(255,255,255,0.12); color: #fff;
  outline: none; transition: all .2s;
}
.navbar .nav-search input::placeholder { color: rgba(255,255,255,0.5); }
.navbar .nav-search input:focus { background: rgba(255,255,255,0.2); width: 220px; }
.navbar .nav-search button {
  position: absolute; right: 4px; top: 4px;
  width: 26px; height: 26px; border: none;
  background: none; color: rgba(255,255,255,0.6);
  cursor: pointer; font-size: 14px;
}

/* ── 主容器 ──────────────────────────── */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: calc(var(--nav-height) + 24px) 16px 60px;
}

/* ── 首页 Hero ──────────────────────────── */
.hero {
  text-align: center;
  padding: 40px 0 32px;
}
.hero h1 {
  font-size: 32px; color: var(--color-ink);
  margin-bottom: 12px;
}
.hero h1 .accent { color: var(--color-cinnabar); }
.hero .subtitle {
  font-size: 15px; color: var(--color-ink-light);
  max-width: 560px; margin: 0 auto 24px;
}
.hero-search {
  max-width: 560px; margin: 0 auto;
  position: relative;
}
.hero-search input {
  width: 100%; height: 48px;
  border: 2px solid var(--color-border);
  border-radius: 24px; padding: 0 50px 0 20px;
  font-size: 15px; background: var(--color-card);
  outline: none; transition: border-color .2s;
}
.hero-search input:focus { border-color: var(--color-cinnabar); }
.hero-search button {
  position: absolute; right: 6px; top: 6px;
  width: 36px; height: 36px; border: none;
  background: var(--color-cinnabar); color: #fff;
  border-radius: 50%; cursor: pointer; font-size: 15px;
  display: flex; align-items: center; justify-content: center;
}
.hero-tags {
  display: flex; flex-wrap: wrap; gap: 8px;
  justify-content: center; margin-top: 16px;
}
.hero-tags a {
  font-size: 13px; padding: 4px 14px;
  background: var(--color-paper-warm); border-radius: 16px;
  color: var(--color-ink-light); border: 1px solid var(--color-border);
  transition: all .2s; cursor: pointer;
}
.hero-tags a:hover {
  background: var(--color-cinnabar); color: #fff;
  border-color: var(--color-cinnabar);
}

/* ── 首页双模式 Tab ──────────────────── */
.hero-mode-tabs {
  display: flex; gap: 4px; justify-content: center;
  margin-bottom: 14px;
}
.hero-mode-tabs .mode-tab {
  padding: 8px 20px; font-size: 14px; cursor: pointer;
  border-radius: 20px; color: var(--color-ink-light);
  background: var(--color-card); border: 1px solid var(--color-border);
  transition: all .2s; user-select: none;
}
.hero-mode-tabs .mode-tab:hover { color: var(--color-ink); }
.hero-mode-tabs .mode-tab.active {
  background: var(--color-ink); color: #fff; border-color: var(--color-ink);
}

/* AI 问答输入框 */
.hero-chat-input {
  max-width: 560px; margin: 0 auto;
  position: relative;
}
.hero-chat-input input {
  width: 100%; height: 48px;
  border: 2px solid var(--color-border);
  border-radius: 24px; padding: 0 56px 0 20px;
  font-size: 16px; background: var(--color-card);
  outline: none; transition: border-color .2s;
  -webkit-appearance: none;
}
.hero-chat-input input:focus { border-color: var(--color-cinnabar); }
.hero-chat-input button {
  position: absolute; right: 6px; top: 6px;
  width: 36px; height: 36px; border: none;
  background: var(--color-cinnabar); color: #fff;
  border-radius: 50%; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: background .2s;
}
.hero-chat-input button:hover { background: var(--color-cinnabar-dark); }
.hero-chat-input button:disabled, .hero-chat-input button.disabled {
  background: #ccc; cursor: not-allowed;
}

/* 首页内嵌对话区 */
.home-chat-area {
  max-width: 760px; margin: 0 auto 24px;
  background: var(--color-card); border-radius: var(--radius);
  border: 1px solid var(--color-border); overflow: hidden;
}
.home-chat-messages {
  max-height: 500px; overflow-y: auto; padding: 20px;
}
.home-chat-sources {
  border-top: 1px solid var(--color-border);
  padding: 12px 20px; background: var(--color-paper-warm);
}

/* ── 快速入口 ──────────────────────────── */
.quick-entry {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 12px; margin: 28px 0;
}
.quick-entry a {
  display: flex; flex-direction: column; align-items: center;
  padding: 20px 12px; background: var(--color-card);
  border-radius: var(--radius); text-align: center;
  border: 1px solid var(--color-border);
  transition: all .2s; color: var(--color-ink);
}
.quick-entry a:hover {
  border-color: var(--color-cinnabar);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.quick-entry .qe-icon { font-size: 28px; margin-bottom: 8px; }
.quick-entry .qe-label { font-size: 14px; font-weight: 600; }
.quick-entry .qe-desc { font-size: 12px; color: var(--color-ink-light); margin-top: 4px; }

/* ── 模块分类 ──────────────────────────── */
.section-title {
  font-size: 20px; margin: 32px 0 16px;
  padding-bottom: 10px; border-bottom: 2px solid var(--color-border);
  display: flex; align-items: center; gap: 8px;
}
.section-title .bar {
  width: 4px; height: 20px; background: var(--color-cinnabar);
  border-radius: 2px;
}

.module-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
}
.module-card {
  display: block; padding: 20px;
  background: var(--color-card); border-radius: var(--radius);
  border: 1px solid var(--color-border);
  transition: all .2s; cursor: pointer;
  text-decoration: none; color: inherit;
}
.module-card:hover {
  border-color: var(--color-cinnabar);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.module-card .mc-icon {
  font-size: 32px; margin-bottom: 10px;
  display: block;
}
.module-card .mc-name {
  font-size: 17px; font-weight: 700;
  font-family: 'Songti SC', 'SimSun', serif;
  margin-bottom: 6px;
}
.module-card .mc-desc {
  font-size: 13px; color: var(--color-ink-light);
  line-height: 1.6;
}
.module-card .mc-meta {
  margin-top: 10px; font-size: 12px;
  color: var(--color-jade);
  display: flex; gap: 10px;
}
.module-card .mc-badge {
  display: inline-block; padding: 2px 8px;
  background: var(--color-paper-warm); border-radius: 10px;
  font-size: 11px; color: var(--color-gold);
}

/* ── 模块详情页 ──────────────────────────── */
.module-header {
  margin-bottom: 28px;
}
.module-header .back {
  font-size: 14px; color: var(--color-ink-light);
  margin-bottom: 12px; display: inline-block;
}
.module-header h1 {
  font-size: 26px; display: flex; align-items: center; gap: 10px;
}
.module-header .module-desc {
  color: var(--color-ink-light); margin-top: 8px; font-size: 14px;
}

.content-section {
  background: var(--color-card); border-radius: var(--radius);
  padding: 24px 28px; margin-bottom: 20px;
  border: 1px solid var(--color-border);
}
.content-section h2 {
  font-size: 19px; color: var(--color-cinnabar);
  margin-bottom: 14px; padding-bottom: 8px;
  border-bottom: 1px solid var(--color-border);
}
.content-section h3 {
  font-size: 16px; margin: 18px 0 10px; color: var(--color-ink);
}
.content-section p { margin-bottom: 12px; }
.content-section table {
  width: 100%; border-collapse: collapse; margin: 14px 0;
  font-size: 14px; display: block; overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}
.content-section th, .content-section td {
  border: 1px solid var(--color-border);
  padding: 8px 12px; text-align: left;
  white-space: nowrap;
}
.content-section th {
  background: var(--color-paper-warm); font-weight: 600;
}
.content-section blockquote {
  border-left: 3px solid var(--color-gold);
  padding: 10px 16px; margin: 14px 0;
  background: var(--color-paper-warm); border-radius: 0 8px 8px 0;
  color: var(--color-ink-light); font-size: 14px;
}
.content-section code {
  background: var(--color-paper-warm); padding: 2px 6px;
  border-radius: 4px; font-size: 13px;
}
.content-section ul, .content-section ol {
  margin: 10px 0 10px 20px;
}
.content-section li { margin-bottom: 6px; }
.content-section strong { color: var(--color-cinnabar); }

/* ── 分类医案与全文阅读 ─────────────────── */
.case-directory { display: grid; gap: 14px; }
.case-summary-card {
  position: relative;
  padding: 18px 20px;
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-gold);
  border-radius: 10px;
  background: var(--color-paper-warm);
}
.case-summary-card h3 { margin: 0 0 8px; font-size: 17px; color: var(--color-ink); }
.case-summary-card .case-meta { margin: 0 0 9px; color: var(--color-ink-light); font-size: 13px; }
.case-summary-card .case-summary { margin: 0; color: var(--color-ink); line-height: 1.8; }
.case-read-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 13px;
  padding: 7px 12px;
  color: #fff;
  background: var(--color-cinnabar);
  border-radius: 6px;
  font-size: 13px;
  font-weight: 600;
}
.case-read-link:hover { background: var(--color-cinnabar-dark); color: #fff; }
.case-reader { font-size: 16px; line-height: 1.95; }
.case-reader > p { margin-bottom: 16px; }
.case-reader blockquote { margin-top: 22px; }

/* ── 搜索结果 ──────────────────────────── */
.search-box {
  display: flex; gap: 10px; margin-bottom: 24px;
}
.search-box input {
  flex: 1; height: 44px; border: 2px solid var(--color-border);
  border-radius: 22px; padding: 0 18px; font-size: 15px;
  outline: none; background: var(--color-card);
}
.search-box input:focus { border-color: var(--color-cinnabar); }
.search-box button {
  width: 80px; border: none; background: var(--color-cinnabar);
  color: #fff; border-radius: 22px; font-size: 15px;
  cursor: pointer;
}

.search-tabs {
  display: flex; gap: 0; margin-bottom: 20px;
  border-bottom: 2px solid var(--color-border);
}
.search-tabs .tab {
  padding: 10px 20px; font-size: 15px; cursor: pointer;
  border-bottom: 3px solid transparent; margin-bottom: -2px;
  color: var(--color-ink-light); transition: all .2s;
}
.search-tabs .tab.active {
  color: var(--color-cinnabar); border-bottom-color: var(--color-cinnabar);
  font-weight: 600;
}

.result-item {
  background: var(--color-card); border-radius: var(--radius);
  padding: 18px 22px; margin-bottom: 12px;
  border: 1px solid var(--color-border);
  transition: box-shadow .2s;
}
.result-item:hover { box-shadow: var(--shadow-md); }
.result-item .ri-module {
  font-size: 12px; color: var(--color-jade); margin-bottom: 6px;
}
.result-item .ri-module .icon { margin-right: 4px; }
.result-item .ri-title {
  font-size: 16px; font-weight: 600; margin-bottom: 6px;
}
.result-item .ri-title a { color: var(--color-ink); }
.result-item .ri-title a:hover { color: var(--color-cinnabar); }
.result-item .ri-snippet {
  font-size: 14px; color: var(--color-ink-light);
  line-height: 1.7;
}
.result-item .ri-snippet strong { color: var(--color-cinnabar); }

/* ── 截图结果 ──────────────────────────── */
.shot-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px;
}
.shot-card {
  background: var(--color-card); border-radius: var(--radius);
  overflow: hidden; border: 1px solid var(--color-border);
  transition: all .2s; cursor: pointer;
  text-decoration: none; color: inherit;
}
.shot-card:hover {
  box-shadow: var(--shadow-md); transform: translateY(-2px);
  border-color: var(--color-cinnabar);
}
.shot-card .sc-img {
  width: 100%; height: 150px; object-fit: cover;
  background: var(--color-paper-warm);
  border-bottom: 1px solid var(--color-border);
}
.shot-card .sc-body { padding: 12px 14px; }
.shot-card .sc-lesson {
  font-size: 12px; color: var(--color-jade); margin-bottom: 4px;
}
.shot-card .sc-time { font-size: 12px; color: var(--color-gold); }
.shot-card .sc-desc {
  font-size: 13px; color: var(--color-ink-light);
  line-height: 1.6; margin-top: 6px;
  display: -webkit-box; -webkit-line-clamp: 3;
  -webkit-box-orient: vertical; overflow: hidden;
}

/* ── 截图详情页 ──────────────────────────── */
.shot-detail { max-width: 800px; margin: 0 auto; }
.shot-detail .back {
  font-size: 14px; color: var(--color-ink-light);
  margin-bottom: 16px; display: inline-block;
}
.shot-detail .shot-img-wrap {
  background: var(--color-card); border-radius: var(--radius);
  padding: 20px; border: 1px solid var(--color-border);
  text-align: center; margin-bottom: 20px;
}
.shot-detail .shot-img-wrap img {
  max-width: 100%; border-radius: 8px;
}
.shot-detail .shot-info {
  background: var(--color-card); border-radius: var(--radius);
  padding: 20px 24px; border: 1px solid var(--color-border);
}
.shot-detail .shot-info h2 { font-size: 18px; margin-bottom: 12px; }
.shot-detail .shot-info .info-row {
  display: flex; padding: 8px 0; border-bottom: 1px solid var(--color-border);
  font-size: 14px;
}
.shot-detail .shot-info .info-row:last-child { border-bottom: none; }
.shot-detail .shot-info .info-label {
  width: 80px; color: var(--color-ink-light); flex-shrink: 0;
}
.shot-detail .shot-info .info-value { flex: 1; }

/* ── 六经辨证 ──────────────────────────── */
.six-channel-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px; margin: 20px 0;
}
.channel-card {
  background: var(--color-card); border-radius: var(--radius);
  padding: 20px; border: 1px solid var(--color-border);
  border-top: 4px solid var(--color-cinnabar);
  transition: all .2s;
}
.channel-card:hover { box-shadow: var(--shadow-md); }
.channel-card.cc-taiyang { border-top-color: #e74c3c; }
.channel-card.cc-shaoyang { border-top-color: #f39c12; }
.channel-card.cc-yangming { border-top-color: #d35400; }
.channel-card.cc-taiyin { border-top-color: #27ae60; }
.channel-card.cc-shaoyin { border-top-color: #2980b9; }
.channel-card.cc-jueyin { border-top-color: #8e44ad; }

/* ── 安全声明 ──────────────────────────── */
.safety-notice {
  background: #fff5f5; border: 1px solid #ffd5d5;
  border-radius: var(--radius); padding: 16px 20px;
  margin: 24px 0; font-size: 13px; color: #666;
  line-height: 1.7;
}
.safety-notice .sn-title {
  font-weight: 700; color: var(--color-cinnabar);
  margin-bottom: 6px; font-size: 14px;
}

/* ── 页脚 ──────────────────────────── */
.footer {
  text-align: center; padding: 32px 16px;
  font-size: 13px; color: var(--color-ink-light);
  border-top: 1px solid var(--color-border);
  margin-top: 40px;
}
.footer .footer-links {
  display: flex; gap: 16px; justify-content: center;
  margin-bottom: 12px;
}
.footer .footer-disclaimer {
  max-width: 600px; margin: 0 auto;
  line-height: 1.6; opacity: 0.8;
}

/* ── 移动端适配 ──────────────────────────── */
@media (max-width: 768px) {
  .navbar { padding: 0 10px; height: 50px; }
  .navbar .brand { font-size: 15px; }
  .navbar .brand .seal { width: 24px; height: 24px; line-height: 24px; font-size: 14px; }
  .navbar .nav-links { display: none; }
  .navbar .nav-search { margin-left: auto; }
  .navbar .nav-search input { width: 90px; height: 30px; font-size: 12px; padding: 0 30px 0 10px; }
  .navbar .nav-search input:focus { width: 120px; }
  .navbar .nav-search button { right: 2px; top: 2px; width: 22px; height: 22px; font-size: 12px; }

  .hero { padding: 16px 0 20px; }
  .hero h1 { font-size: 22px; }
  .hero .subtitle { font-size: 13px; line-height: 1.6; }

  .hero-mode-tabs .mode-tab { padding: 7px 16px; font-size: 13px; }
  .hero-search input, .hero-chat-input input { height: 44px; font-size: 16px; border-radius: 22px; }
  .hero-search button, .hero-chat-input button { width: 32px; height: 32px; top: 6px; right: 6px; }
  .hero-tags a { font-size: 12px; padding: 3px 12px; }

  .container { padding: calc(50px + 12px) 10px 30px; }

  .module-grid { grid-template-columns: 1fr 1fr; gap: 8px; }
  .module-card { padding: 12px; }
  .module-card .mc-icon { font-size: 24px; }
  .module-card .mc-name { font-size: 14px; }
  .module-card .mc-desc { font-size: 11px; line-height: 1.5; }
  .module-card .mc-meta { font-size: 11px; }

  .quick-entry { grid-template-columns: repeat(2, 1fr); gap: 8px; }
  .quick-entry a { padding: 14px 8px; }
  .quick-entry .qe-icon { font-size: 24px; }
  .quick-entry .qe-label { font-size: 13px; }

  .content-section { padding: 14px; }
  .content-section h2 { font-size: 17px; }
  .content-section table { font-size: 12px; }
  .content-section th, .content-section td { padding: 5px 6px; }

  .shot-grid { grid-template-columns: 1fr 1fr; gap: 8px; }
  .shot-card .sc-img { height: 100px; }
  .shot-card .sc-body { padding: 10px; }
  .shot-card .sc-desc { font-size: 12px; }

  .search-box input { font-size: 14px; height: 40px; }
  .search-box button { width: 60px; font-size: 14px; }
  .search-tabs .tab { padding: 8px 14px; font-size: 13px; }

  .section-title { font-size: 17px; margin: 24px 0 12px; }

  .safety-notice { padding: 12px 14px; font-size: 12px; }

  /* 首页对话区移动端 */
  .home-chat-area { margin: 0 -2px 16px; border-radius: 10px; }
  .home-chat-messages { max-height: none; padding: 14px; }
  .home-chat-sources { padding: 10px 14px; }
  .source-chip { font-size: 11px; padding: 3px 10px; }

  /* 消息气泡移动端 */
  .msg { gap: 8px; margin-bottom: 12px; }
  .msg-avatar { width: 30px; height: 30px; font-size: 13px; }
  .msg-bubble { font-size: 14px; padding: 10px 12px; max-width: calc(100% - 42px); line-height: 1.7; }
  .msg-bubble h3, .msg-bubble h4 { font-size: 14px; margin: 8px 0 4px; }
  .msg-bubble table { font-size: 12px; }
  .msg-bubble th, .msg-bubble td { padding: 4px 6px; }
  .msg-bubble ul { margin: 4px 0 4px 14px; }
  .msg-bubble pre { font-size: 12px; padding: 8px 10px; }
}

@media (max-width: 480px) {
  .module-grid { grid-template-columns: 1fr; }
  .shot-grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 19px; }
  .hero .subtitle { font-size: 12px; }
  .hero-mode-tabs .mode-tab { padding: 6px 14px; font-size: 12px; }
  .hero-tags { gap: 6px; }
  .hero-tags a { font-size: 11px; padding: 3px 10px; }

  .msg-bubble { font-size: 13px; padding: 10px; }
  .msg-bubble table { font-size: 11px; }
  .msg-bubble th, .msg-bubble td { padding: 3px 5px; }
}

/* ═══════════════════════════════════════════════
   聊天界面
   ═══════════════════════════════════════════════ */

.chat-container {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  min-height: calc(100vh - var(--nav-height) - 120px);
}

.chat-header {
  text-align: center;
  margin-bottom: 16px;
}
.chat-header h1 {
  font-size: 22px;
  color: var(--color-ink);
}
.chat-header .chat-subtitle {
  font-size: 13px;
  color: var(--color-ink-light);
  margin-top: 6px;
}

/* 消息区 */
.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 8px 0 16px;
  min-height: 300px;
  max-height: 60vh;
}

.msg {
  display: flex;
  gap: 10px;
  margin-bottom: 16px;
  animation: fadeInUp .3s ease;
}
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.msg-avatar {
  width: 36px; height: 36px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 16px; font-weight: 700;
  flex-shrink: 0;
  font-family: 'Songti SC', 'SimSun', serif;
}
.msg-user .msg-avatar {
  background: var(--color-cinnabar); color: #fff;
}
.msg-ai .msg-avatar {
  background: var(--color-ink); color: #fff;
}

.msg-bubble {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: 4px 16px 16px 16px;
  padding: 14px 18px;
  max-width: calc(100% - 50px);
  line-height: 1.8;
  font-size: 15px;
  box-shadow: var(--shadow-sm);
}
.msg-user .msg-bubble {
  background: var(--color-cinnabar);
  color: #fff;
  border-color: var(--color-cinnabar-dark);
  border-radius: 16px 4px 16px 16px;
}
.msg-user .msg-bubble strong { color: #fff; }

.msg-bubble p { margin-bottom: 8px; }
.msg-bubble p:last-child { margin-bottom: 0; }
.msg-bubble ul { margin: 6px 0 6px 18px; }
.msg-bubble li { margin-bottom: 4px; }
.msg-bubble strong { color: var(--color-cinnabar); }
.msg-bubble h3, .msg-bubble h4 { margin: 12px 0 6px; font-size: 16px; }
.msg-bubble table {
  width: 100%; border-collapse: collapse; margin: 10px 0;
  font-size: 14px; display: block; overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}
.msg-bubble th, .msg-bubble td {
  border: 1px solid var(--color-border);
  padding: 6px 10px; text-align: left;
  white-space: nowrap;
}
.msg-bubble th { background: var(--color-paper-warm); }
.msg-bubble pre {
  background: var(--color-paper-warm); padding: 10px 14px;
  border-radius: 8px; overflow-x: auto; font-size: 13px;
  margin: 8px 0; -webkit-overflow-scrolling: touch;
}
.msg-bubble code {
  background: var(--color-paper-warm); padding: 2px 6px;
  border-radius: 4px; font-size: 13px;
}
.msg-user .msg-bubble pre { background: rgba(255,255,255,0.15); color: #fff; }
.msg-user .msg-bubble code { background: rgba(255,255,255,0.15); color: #fff; }

/* 打字动画 */
.typing-indicator {
  display: inline-flex; gap: 4px; padding: 4px 0;
}
.typing-indicator span {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--color-ink-light);
  animation: bounce 1.4s infinite ease-in-out;
}
.typing-indicator span:nth-child(2) { animation-delay: 0.2s; }
.typing-indicator span:nth-child(3) { animation-delay: 0.4s; }
@keyframes bounce {
  0%, 60%, 100% { transform: translateY(0); opacity: 0.4; }
  30% { transform: translateY(-6px); opacity: 1; }
}

/* 引用来源 */
.chat-sources {
  background: var(--color-paper-warm);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 12px 16px;
  margin-bottom: 16px;
}
.sources-title {
  font-size: 13px; font-weight: 600;
  color: var(--color-ink-light);
  margin-bottom: 8px;
}
.sources-list {
  display: flex; flex-wrap: wrap; gap: 8px;
}
.source-chip {
  display: inline-flex; align-items: center;
  padding: 4px 12px;
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: 16px;
  font-size: 12px; color: var(--color-ink);
  text-decoration: none;
  transition: all .2s;
}
.source-chip:hover {
  border-color: var(--color-cinnabar);
  color: var(--color-cinnabar);
}
.source-chip.source-shot {
  background: #f0f7f0;
  border-color: var(--color-jade);
}

/* 输入区 */
.chat-input-area {
  border-top: 1px solid var(--color-border);
  padding-top: 16px;
}
.chat-input-wrap {
  display: flex; gap: 10px;
  align-items: flex-end;
}
.chat-input-wrap textarea {
  flex: 1;
  border: 2px solid var(--color-border);
  border-radius: 16px;
  padding: 12px 16px;
  font-size: 15px;
  font-family: inherit;
  resize: none;
  outline: none;
  background: var(--color-card);
  transition: border-color .2s;
  line-height: 1.5;
  max-height: 120px;
}
.chat-input-wrap textarea:focus { border-color: var(--color-cinnabar); }
.chat-input-wrap button {
  padding: 12px 24px;
  border: none;
  background: var(--color-cinnabar);
  color: #fff;
  border-radius: 16px;
  font-size: 15px;
  cursor: pointer;
  transition: all .2s;
  white-space: nowrap;
  height: 46px;
}
.chat-input-wrap button:hover { background: var(--color-cinnabar-dark); }
.chat-input-wrap button:disabled,
.chat-input-wrap button.disabled {
  background: #ccc; cursor: not-allowed;
}
.chat-hint {
  text-align: right;
  font-size: 12px;
  color: var(--color-ink-light);
  margin-top: 6px;
  opacity: 0.7;
}

/* 移动端聊天适配 */
@media (max-width: 768px) {
  .chat-header h1 { font-size: 18px; }
  .chat-header .chat-subtitle { font-size: 12px; }
  .msg-avatar { width: 30px; height: 30px; font-size: 13px; }
  .msg-bubble { font-size: 14px; padding: 10px 12px; max-width: calc(100% - 42px); }
  .chat-input-wrap textarea { font-size: 16px; padding: 10px 14px; }
  .chat-input-wrap button { padding: 10px 16px; font-size: 14px; height: 42px; }
  .chat-messages { max-height: 50vh; }
  .chat-hint { font-size: 11px; }
}

/* ═══════════════════════════════════════════════
   统计面板
   ═══════════════════════════════════════════════ */

.stats-container { max-width: 900px; margin: 0 auto; }
.stats-header { margin-bottom: 24px; }
.stats-header h1 { font-size: 22px; margin: 8px 0 12px; }
.stats-range { display: flex; gap: 8px; }
.stats-range a {
  padding: 5px 16px; font-size: 13px; border-radius: 16px;
  background: var(--color-card); border: 1px solid var(--color-border);
  color: var(--color-ink-light); transition: all .2s;
}
.stats-range a.active, .stats-range a:hover {
  background: var(--color-ink); color: #fff; border-color: var(--color-ink);
}
.stats-cards {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
  gap: 12px; margin-bottom: 28px;
}
.stat-card {
  background: var(--color-card); border: 1px solid var(--color-border);
  border-radius: var(--radius); padding: 16px; text-align: center;
}
.stat-card.accent { border-color: var(--color-cinnabar); background: #fff8f6; }
.stat-label { font-size: 12px; color: var(--color-ink-light); margin-bottom: 6px; }
.stat-value { font-size: 28px; font-weight: 700; font-family: -apple-system, sans-serif; }
.stat-card.accent .stat-value { color: var(--color-cinnabar); }
.stats-section {
  background: var(--color-card); border: 1px solid var(--color-border);
  border-radius: var(--radius); padding: 20px; margin-bottom: 20px;
}
.stats-section h2 { font-size: 17px; margin-bottom: 16px; }
.chart-bars {
  display: flex; align-items: flex-end; gap: 2px; height: 160px;
  overflow-x: auto; padding-bottom: 24px;
}
.chart-bars.hourly { height: 120px; }
.chart-col {
  flex: 1; min-width: 24px; display: flex; flex-direction: column;
  align-items: center; height: 100%;
}
.chart-bar-wrap { flex: 1; width: 100%; display: flex; gap: 2px; align-items: flex-end; justify-content: center; }
.chart-bar { width: 8px; border-radius: 3px 3px 0 0; min-height: 2px; transition: height .3s; }
.chart-bar.pv { background: var(--color-cinnabar); }
.chart-bar.uv { background: var(--color-gold); }
.chart-label { font-size: 10px; color: var(--color-ink-light); margin-top: 4px; white-space: nowrap; }
.chart-legend { display: flex; gap: 16px; font-size: 12px; color: var(--color-ink-light); margin-top: 8px; }
.dot { display: inline-block; width: 10px; height: 10px; border-radius: 2px; margin-right: 4px; }
.dot-pv { background: var(--color-cinnabar); }
.dot-uv { background: var(--color-gold); }
.stats-row { display: flex; gap: 20px; }
.stats-section.half { flex: 1; }
.stats-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.stats-table th { text-align: left; padding: 6px 10px; color: var(--color-ink-light); border-bottom: 1px solid var(--color-border); }
.stats-table td { padding: 6px 10px; border-bottom: 1px solid var(--color-border); }
.stats-table td a { color: var(--color-ink); }
.stats-table td a:hover { color: var(--color-cinnabar); }
.device-split { display: flex; gap: 16px; }
.device-item {
  flex: 1; display: flex; flex-direction: column; align-items: center;
  padding: 14px; background: var(--color-paper-warm); border-radius: 10px;
}
.device-icon { font-size: 28px; }
.device-label { font-size: 13px; color: var(--color-ink-light); margin-top: 4px; }
.device-count { font-size: 22px; font-weight: 700; margin-top: 4px; }
.stats-footer { text-align: center; font-size: 12px; color: var(--color-ink-light); padding: 20px 0; opacity: 0.8; }
.stats-footer a { color: var(--color-cinnabar); }
@media (max-width: 768px) {
  .stats-cards { grid-template-columns: repeat(2, 1fr); }
  .stat-value { font-size: 22px; }
  .stats-row { flex-direction: column; }
  .chart-bars { height: 120px; }
  .chart-label { font-size: 9px; }
}

/* ── v2.1.0 扩充版特色板块 ──────────── */
.nx-feature-band {
  background: linear-gradient(135deg, var(--color-paper-warm) 0%, var(--color-paper) 100%);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 28px 24px 22px;
  margin: 24px 0;
  box-shadow: var(--shadow-sm);
}
.nx-feature-head { text-align: center; margin-bottom: 22px; }
.nx-feature-head h2 {
  font-size: 22px; color: var(--color-ink); margin: 10px 0 6px;
}
.nx-feature-head p {
  font-size: 13px; color: var(--color-ink-light); line-height: 1.7;
}
.nx-badge {
  display: inline-block; background: var(--color-cinnabar); color: #fff;
  font-size: 12px; font-weight: 600; padding: 3px 12px; border-radius: 20px;
  letter-spacing: 0.5px;
}
.nx-feature-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-bottom: 22px;
}
.nx-fcard {
  background: var(--color-card); border: 1px solid var(--color-border);
  border-radius: 10px; padding: 16px 14px; text-align: center;
  transition: transform .2s, box-shadow .2s, border-color .2s;
  display: flex; flex-direction: column; align-items: center;
}
.nx-fcard:hover {
  transform: translateY(-3px); box-shadow: var(--shadow-md);
  border-color: var(--color-gold);
}
.nxf-icon { font-size: 26px; margin-bottom: 8px; }
.nxf-name { font-size: 14px; font-weight: 700; color: var(--color-ink); margin-bottom: 4px; }
.nxf-desc { font-size: 12px; color: var(--color-ink-light); line-height: 1.55; }
.nx-feature-stats {
  display: flex; justify-content: space-around; flex-wrap: wrap; gap: 8px;
  background: var(--color-card); border-radius: 10px; padding: 16px 12px;
  border: 1px solid var(--color-border);
}
.nx-stat { display: flex; flex-direction: column; align-items: center; min-width: 70px; }
.nx-num {
  font-size: 22px; font-weight: 700; color: var(--color-cinnabar);
  font-family: 'Songti SC', serif;
}
.nx-lab { font-size: 11px; color: var(--color-ink-light); margin-top: 2px; }
@media (max-width: 768px) {
  .nx-feature-grid { grid-template-columns: repeat(2, 1fr); }
  .nx-stat { min-width: 60px; }
  .nx-num { font-size: 18px; }
}

/* ── 学习路径与资料库 ──────────── */
.learning-paths {
  margin: 30px 0 26px;
  padding: 30px 24px;
  background: linear-gradient(135deg, #fffdf9 0%, var(--color-paper-warm) 100%);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}
.path-heading, .library-intro { text-align: center; }
.path-eyebrow, .learning-flow-eyebrow, .module-kicker {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--color-cinnabar);
}
.path-heading h2, .library-intro h2 {
  font-size: 24px;
  margin: 5px 0 6px;
  color: var(--color-ink);
}
.path-heading p, .library-intro p { color: var(--color-ink-light); font-size: 14px; }
.path-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-top: 22px;
}
.path-card {
  position: relative;
  display: block;
  min-height: 205px;
  padding: 22px 18px 18px;
  color: var(--color-ink);
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  overflow: hidden;
  transition: transform .2s, box-shadow .2s, border-color .2s;
}
.path-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); border-color: var(--color-gold); color: var(--color-ink); }
.path-number { position: absolute; top: 12px; right: 14px; font-size: 12px; color: var(--color-gold); font-weight: 700; }
.path-icon { display: block; font-size: 28px; margin-bottom: 8px; }
.path-card h3 { font-size: 18px; margin-bottom: 7px; }
.path-card p { font-size: 13px; color: var(--color-ink-light); line-height: 1.7; }
.path-action { display: inline-block; margin-top: 14px; color: var(--color-cinnabar); font-size: 13px; font-weight: 700; }
.quick-entry-refined { grid-template-columns: repeat(4, 1fr); margin: 20px 0 30px; }
.library-section { margin-top: 32px; }
.library-intro { margin-bottom: 16px; }
.library-group {
  margin: 12px 0;
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
}
.library-group summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 15px 18px;
  cursor: pointer;
  list-style: none;
  font-weight: 700;
  color: var(--color-ink);
}
.library-group summary::-webkit-details-marker { display: none; }
.library-group summary::after { content: '＋'; margin-left: auto; color: var(--color-cinnabar); font-size: 20px; font-weight: 400; }
.library-group[open] summary { border-bottom: 1px solid var(--color-border); background: var(--color-paper-warm); }
.library-group[open] summary::after { content: '−'; }
.library-group-title { font-size: 18px; }
.library-group .module-grid { padding: 16px; margin: 0; }

/* ── 模块详情：学习框架流程图 ──────────── */
.module-kicker { margin-top: 12px; }
.module-resource-link { margin-top: 12px; }
.module-resource-link a { font-size: 14px; color: var(--color-jade); font-weight: 600; }
.learning-flow-section {
  margin: 28px 0;
  padding: 28px 24px 22px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: linear-gradient(135deg, #fffdf9 0%, #f5f0e8 100%);
}
.learning-flow-heading { text-align: center; margin-bottom: 20px; }
.learning-flow-heading h2 { font-size: 24px; margin: 4px 0 6px; }
.learning-flow-heading p { color: var(--color-ink-light); font-size: 14px; }
.learning-flow { display: flex; flex-direction: column; gap: 10px; max-width: 760px; margin: 0 auto; }
.flow-step {
  position: relative;
  display: grid;
  grid-template-columns: 54px 1fr;
  gap: 14px;
  padding: 15px 18px;
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: 10px;
}
.flow-step-foundation { border-left: 4px solid var(--color-cinnabar); }
.flow-marker {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-ink);
  color: #fff;
  font-family: 'Songti SC', serif;
  font-weight: 700;
}
.flow-step-foundation .flow-marker { background: var(--color-cinnabar); }
.flow-content h3 { font-size: 18px; margin: 0 0 4px; }
.flow-question { margin: 0; font-size: 14px; font-weight: 600; color: var(--color-ink); line-height: 1.65; }
.flow-hint { margin: 3px 0 0; color: var(--color-ink-light); font-size: 13px; line-height: 1.65; }
.flow-arrow { position: absolute; left: 17px; bottom: -18px; z-index: 1; color: var(--color-cinnabar); font-size: 23px; line-height: 1; }
.learning-flow-note {
  margin-top: 18px;
  padding: 11px 14px;
  border-radius: 8px;
  background: rgba(192, 57, 43, .07);
  color: var(--color-ink-light);
  font-size: 13px;
}

/* ── 板块标题计数 ──────────── */
.section-count {
  font-size: 13px;
  color: var(--color-ink-light);
  font-weight: 400;
  margin-left: 8px;
}
@media (max-width: 768px) {
  .learning-paths, .learning-flow-section { padding: 22px 16px 18px; }
  .path-grid, .quick-entry-refined { grid-template-columns: 1fr; }
  .path-card { min-height: auto; }
  .library-group .module-grid { padding: 12px; }
  .library-group-title { font-size: 16px; }
  .flow-step { grid-template-columns: 46px 1fr; gap: 10px; padding: 13px; }
  .flow-marker { width: 36px; height: 36px; font-size: 12px; }
  .flow-arrow { left: 12px; bottom: -18px; }
}