/** Promised Land - components.css | Auto-split from style.css */
/* ========== 内联展开面板 ========== */
    .expand-panel {
      overflow: hidden;
      white-space: nowrap;
      transition: width 0.35s var(--ease-out-expo), opacity 0.25s ease;
      display: flex;
      align-items: center;
      width: 0;
      opacity: 0;
    }

    .expand-panel.open {
      opacity: 1;
    }

    /* ========== 搜索展开框（图标在输入框内） ========== */
    .search-expand-wrap {
      display: flex;
      align-items: center;
      border-radius: 20px;
      background: transparent;
      border: 0.5px solid transparent;
      padding: 5px 0;
      transition: width 0.45s var(--ease-out-expo),
        background 0.45s var(--ease-out-expo),
        border-color 0.45s var(--ease-out-expo);
      will-change: width;
      cursor: pointer;
      width: 28px;
      overflow: hidden;
    }

    .search-expand-wrap.open {
      width: 150px;
      background: var(--color-panel1-search-bg);
      border-color: var(--color-panel1-search-border);
    }

    .search-icon-inner {
      flex-shrink: 0;
      color: var(--color-panel1-search-icon);
      transition: color 0.3s;
      margin: 2px 2px 2px 5px;
    }

    .search-expand-wrap:hover .search-icon-inner {
      color: var(--color-panel1-search-icon-hover);
    }

    .search-expand-wrap.open .search-icon-inner {
      color: var(--color-panel1-search-icon-open);
    }

    .expand-search-input {
      width: 0;
      border: none;
      background: transparent;
      font-family: 'Inter', sans-serif;
      font-size: 0.78rem;
      font-weight: 300;
      color: var(--color-panel1-search-input);
      outline: none;
      transition: width 0.3s var(--ease-out-expo);
      padding: 0;
    }

    .search-expand-wrap.open .expand-search-input {
      width: 100%;
      padding: 0 6px;
    }

    .expand-search-input::placeholder {
      color: var(--color-panel1-search-placeholder);
    }

    #brainExpand {
      flex: 0 0 auto;
      gap: 6px;
    }

    #brainExpand.open {
      width: 72px;
    }

    .expand-spacer {
      flex: 1;
      min-width: 0;
    }

    .expand-icon-btn {
      background: transparent;
      border: none;
      border-radius: 6px;
      padding: 4px;
      color: var(--color-panel1-expand-btn);
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: center;
      transition: color 0.2s;
      flex-shrink: 0;
    }

    .expand-icon-btn:hover {
      background: transparent;
      color: var(--color-panel1-expand-btn-hover);
    }

    .conv-item {
      padding: 0.55rem 0.7rem;
      border-radius: 10px;
      font-size: 0.85rem;
      font-weight: 290;
      color: var(--color-panel1-conv-text);
      cursor: pointer;
      transition: all 0.2s;
      letter-spacing: 0.6px;
    }

    .conv-item:first-child {
      padding-top: 0.1rem;
    }

    .conv-item:hover {
      background: transparent;
      color: var(--color-panel1-conv-hover);
    }

    .conv-item.active {
      background: transparent;
      color: var(--color-panel1-conv-active);
      font-weight: 350;
    }

    .conv-item-title {
      display: block;
      overflow: hidden;
      text-overflow: ellipsis;
      white-space: nowrap;
      padding-right: 20px;
    }

    .conv-delete-btn {
      position: absolute;
      right: 0.5px;
      top: 50%;
      transform: translateY(-50%);
      opacity: 0;
      cursor: pointer;
      color: rgba(255, 255, 255, 0);
      font-size: 1.5rem;
      font-weight: 300;
      line-height: 1;
      padding: 4px 8px;
      transition: opacity 0.2s, color 0.2s;
      border-radius: 4px;
    }

    .conv-delete-btn:hover {
      opacity: 1 !important;
      color: var(--color-panel1-conv-delete-hover);
    }

    .conv-item-empty {
      font-style: italic;
      color: var(--color-panel1-conv-empty);
      padding: 1.5rem 0.7rem;
      text-align: center;
      font-size: 0.78rem;
      cursor: default;
    }

    /* 聊天窗 */
    .chat-window {
      flex: 1;
      min-width: 0;
      display: flex;
      flex-direction: column;
      height: 100dvh;
      background: transparent;
      position: relative;
      margin-left: var(--left-offset, 0px);
      margin-right: 0;
      transition: margin-left 0.35s var(--ease-out-expo);
    }

    .chat-header {
      padding: 3.2rem 1rem 1rem;
      flex-shrink: 0;
      max-width: 1200px;
      width: 100%;
      margin: 0 auto;
    }

    .chat-header-row {
      display: flex;
      align-items: baseline;
      justify-content: space-between;
    }

    /* ========== 聊天窗标题右侧操作按钮 ========== */
    .chat-title-actions {
      display: flex;
      gap: 18px;
      opacity: 0;
      transition: opacity 0.25s ease;
      flex-shrink: 0;
      margin-left: 20px;
    }

    .chat-header:hover .chat-title-actions {
      opacity: 1;
    }

    .chat-title-action-btn {
      background: none;
      border: none;
      cursor: pointer;
      padding: 4px;
      color: var(--color-chat-title-btn);
      display: flex;
      align-items: center;
      justify-content: center;
      transition: color 0.25s, filter 0.25s;
    }

    .chat-title-action-btn svg {
      width: 23px;
      height: 23px;
    }

    .chat-title-action-btn:hover {
      color: var(--color-chat-title-btn-hover);
      filter: drop-shadow(0 0 6px var(--color-chat-title-btn-hover-glow));
    }

    /* 置顶按钮激活态 */
    .chat-title-action-btn.pinned {
      color: var(--color-chat-title-pinned);
    }

    .chat-title-action-btn.pinned:hover {
      color: var(--color-chat-title-pinned-hover);
    }

    .chat-title {
      font-family: 'Cormorant Garamond', 'Times New Roman', serif;
      font-size: 1.5rem;
      font-weight: 500;
      letter-spacing: 3px;
      color: var(--color-chat-title);
      border: none;
      background: transparent;
      outline: none;
      padding: 2px 0;
      padding-left: 30px;
    }

    .chat-title-line {
      display: flex;
      align-items: center;
      gap: 0;
      margin-top: 12px;
    }

    .title-dash {
      display: block;
      width: 100%;
      height: 1px;
      background: linear-gradient(to right, transparent 0%, var(--color-chat-title-line-start) 6%, var(--color-chat-title-line-mid) 20%, var(--color-chat-title-line-warm) 80%, var(--color-chat-title-line-end) 95%, transparent 100%);
      opacity: 0.4;
    }

    .chat-subtitle {
      font-family: 'Inter', sans-serif;
      font-size: 0.7rem;
      font-weight: 300;
      letter-spacing: 1.5px;
      color: var(--color-chat-subtitle);
      opacity: 0.65;
      margin-top: 12px;
      text-align: left;
      padding-left: 30px;
    }

    /* 消息区域 */
    .chat-body {
      flex: 1;
      overflow-y: auto;
      position: relative;
      overflow-x: hidden;
      min-height: 0;
      scrollbar-width: none;
      -ms-overflow-style: none;
      padding-bottom: 211px;
      -webkit-mask-image: linear-gradient(to bottom, transparent 0%, black 3%, black 80%, transparent 95%, transparent 100%);
      mask-image: linear-gradient(to bottom, transparent 0%, black 3%, black 80%, transparent 95%, transparent 100%);
    }

    .chat-body-inner {
      display: flex;
      max-width: 700px;
      width: 100%;
      margin: 0 auto;
      padding: 2rem 1rem 3.3rem;
      min-height: 100%;
      transform: translateX(var(--msg-shift, 0));
      transition: transform 0.4s var(--ease-out-expo);
    }

    .chat-body::-webkit-scrollbar {
      display: none;
    }

    .messages-scroll {
      flex: 1;
      min-width: 0;
      display: flex;
      flex-direction: column;
      gap: 0.3rem;
    }

    .nav-strip {
      position: fixed;
      width: 30px;
      display: flex;
      flex-direction: column;
      gap: 30px;
      padding: 0 8px;
      z-index: 50;
      overflow-y: auto;
      scrollbar-width: none;
      -ms-overflow-style: none;
      pointer-events: auto;
      background: transparent;
      transition: top 0.35s var(--ease-out-expo), right 0.35s var(--ease-out-expo), height 0.35s var(--ease-out-expo);
    }

    .nav-strip::-webkit-scrollbar {
      display: none;
    }

    .nav-block {
      position: relative;
      width: 16px;
      height: 2.5px;
      border-radius: 1.25px;
      background: var(--color-nav-block);
      cursor: pointer;
      transition: all 0.45s var(--ease-out-expo);
      flex-shrink: 0;
    }

    .nav-block::after {
      content: '';
      position: absolute;
      top: -8px;
      left: -10px;
      right: -10px;
      bottom: -8px;
      border-radius: 4px;
      z-index: -1;
    }

    .nav-block:hover {
      background: var(--color-nav-block-hover);
      transform: scaleX(1.15);
    }

    .nav-block.active {
      background: var(--color-nav-block-active);
      width: 16px;
      box-shadow: inset 0 0 6px var(--color-nav-block-active-shadow),
        0 0 12px var(--color-nav-block-active-glow);
      transform: scaleX(1.15);
    }

    /* ========== 导航栏 tooltip ========== */
    .nav-tooltip {
      position: fixed;
      z-index: 500;
      background: var(--color-nav-tooltip-bg);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      color: var(--color-nav-tooltip-text);
      font-family: 'Inter', sans-serif;
      font-size: 0.7rem;
      font-weight: 300;
      letter-spacing: 0.3px;
      padding: 8px 16px;
      border-radius: 12px;
      white-space: nowrap;
      max-width: 220px;
      overflow: hidden;
      text-overflow: ellipsis;
      pointer-events: none;
      opacity: 0;
      transition: opacity 0.2s ease;
      box-shadow: 0 4px 16px var(--color-nav-tooltip-shadow);
      border: 0.5px solid var(--color-nav-tooltip-border);
    }

    .nav-tooltip.show {
      opacity: 1;
    }

    /* 消息 */
    .msg-wrapper {
      display: flex;
      flex-direction: column;
      margin: 0.5rem 0;
      animation: msgFadeIn 0.3s var(--ease-out-expo) forwards;
      position: relative;
    }

    .msg-wrapper.msg-nav-highlight::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 1px;
      background: linear-gradient(to right,
          transparent 0%,
          var(--color-nav-highlight) 10%,
          var(--color-nav-highlight) 90%,
          transparent 100%);
      animation: navLineFadeIn 3s ease-out forwards;
      pointer-events: none;
      z-index: 5;
    }

    @keyframes navLineFadeIn {
      0% {
        opacity: 1;
      }

      50% {
        opacity: 0.3;
      }

      100% {
        opacity: 0;
      }
    }

    @keyframes msgFadeIn {
      from {
        opacity: 0;
        transform: translateY(8px);
      }

      to {
        opacity: 1;
        transform: translateY(0);
      }
    }

    .msg-wrapper.user {
      align-items: flex-end;
    }

    .msg-wrapper.assistant {
      align-items: flex-start;
    }

    .msg-avatar-img {
      width: 36px;
      height: 36px;
      border-radius: 50%;
      object-fit: cover;
      margin-bottom: 0.6rem;
      flex-shrink: 0;
      box-shadow:
        0 3px 10px var(--color-msg-avatar-shadow),
        0 0 0 0.5px var(--color-msg-avatar-shadow-line);
    }

    .msg-avatar-placeholder {
      width: 36px;
      height: 36px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 0.6rem;
      flex-shrink: 0;
    }

    .msg-wrapper.assistant .msg-avatar-placeholder {
      background: var(--color-msg-avatar-assistant-bg);
      color: transparent;
    }

    .msg-wrapper.user .msg-avatar-placeholder {
      background: var(--color-msg-avatar-user-bg);
      color: transparent;
      position: relative;
    }

    /* ========== 思考链 · 磨砂玻璃气泡 ========== */
    .thinking-chain {
      display: inline-flex;
      flex-direction: column;
      align-items: flex-start;
      max-width: 92%;
      margin-bottom: 0.5rem;
      cursor: pointer;
      user-select: none;
      background: var(--color-thinking-bg);
      backdrop-filter: blur(calc(var(--thinking-bubble-blur, 16px)));

      -webkit-backdrop-filter: blur(calc(var(--thinking-bubble-blur, 16px)));
      border: 0.5px solid var(--color-thinking-border);
      border-radius: 24px;
      padding: 0.15rem 1rem;
      position: relative;
      box-shadow:
        0 4px 18px var(--color-thinking-shadow),
        inset 0 0 0 0.5px var(--color-thinking-shadow-inner);
    }

    /* 思维链不透明度增强层：0.50=不改变，>0.50=更不透明，<0.50=更透明（×4 倍率）*/
    .thinking-chain::after {
      content: '';
      position: absolute;
      inset: 0;
      border-radius: 24px;
      background: var(--color-thinking-bg);
      opacity: calc((var(--thinking-bubble-opacity, 0.5) - 0.5) * 4);
      pointer-events: none;
      z-index: 0;
    }

    .thinking-chain-header,
    .thinking-content {
      position: relative;
      z-index: 1;
    }

    /* header：脉搏SVG + 时间，同一行 */
    .thinking-chain-header {
      display: flex;
      align-items: center;
      gap: 0.1rem;
      font-size: 0.85rem;
      font-weight: 300;
      letter-spacing: 0.8px;
      min-height: 28px;
    }

    /* 脉搏SVG容器 */
    .pulse-svg-wrap {
      flex-shrink: 0;
      width: 99px;
      height: 38px;
      display: flex;
      align-items: center;
      margin-left: -30px;
      margin-right: -20px;
      overflow: visible;
      transform-origin: center center;
    }

    .pulse-svg {
      width: 100%;
      height: 100%;
      overflow: visible;
    }

    /* 背景路径（20251208蓝底衬） */
    .pulse-bg {
      stroke: var(--color-thinking-pulse-bg);
      stroke-width: 0.3;
      stroke-linecap: round;
      stroke-linejoin: round;
      fill: none;
    }

    /* 前景路径（动画脉搏线） */
    .pulse-fg {
      stroke: var(--color-thinking-pulse-fg);
      stroke-width: 0.3;
      stroke-linecap: round;
      stroke-linejoin: round;
      fill: none;
      stroke-dasharray: var(--path-len);
      stroke-dashoffset: var(--path-len);
    }

    /* 思考中：循环动画 */
    .pulse-fg.cycling {
      animation:
        sweep-linear 1.98s linear infinite,
        beat-smooth 1.98s ease-in-out infinite;
    }

    /* 线条从左到右绘制 */
    @keyframes sweep-linear {
      0% {
        stroke-dashoffset: var(--path-len);
      }

      96% {
        stroke-dashoffset: 0;
      }

      96.1% {
        stroke-dashoffset: var(--path-len);
      }

      100% {
        stroke-dashoffset: var(--path-len);
      }
    }

    /* 丝滑搏动：静息→微变→上升→峰值→回落→静息 */
    @keyframes beat-smooth {
      0% {
        stroke-width: 0.3;
        opacity: 0.35;
      }

      20% {
        stroke-width: 0.5;
        opacity: 0.35;
      }

      40% {
        stroke-width: 0.7;
        opacity: 0.5;
      }

      60% {
        stroke-width: 0.9;
        opacity: 0.6;
      }

      80% {
        stroke-width: 0.6;
        opacity: 0.7;
      }

      100% {
        stroke-width: 0.3;
        opacity: 0.35;
      }
    }

    /* 思考完成：停在完整状态 */
    .pulse-fg.complete {
      stroke-dashoffset: 0;
      stroke: var(--color-thinking-pulse-complete);
      stroke-width: 0.5;
      animation: complete-breathe 5s ease-in-out infinite;
      -webkit-mask-image: linear-gradient(to right, transparent 0%, black 10%, black 90%, transparent 100%);
      mask-image: linear-gradient(to right, transparent 0%, black 10%, black 90%, transparent 100%);
      filter: drop-shadow(0 0 2px var(--color-thinking-pulse-complete-glow1)) drop-shadow(0 0 6px var(--color-thinking-pulse-complete-glow2));
    }

    @keyframes complete-breathe {

      0%,
      100% {
        opacity: 0.01;
        stroke-width: 0.01;
      }

      50% {
        opacity: 0.78;
        stroke-width: 0.8;
      }
    }

    /* 时间文字 */
    .thinking-time {
      flex-shrink: 0;
      font-family: 'Times new roman', serif;
      font-size: 0.85rem;
      font-weight: 300;
      letter-spacing: 0.3px;
      white-space: nowrap;
    }

    /* ★ 思考中 · 计时文字 · 光带从左到右扫过 */
    .thinking-chain[data-role="streaming-thinking"] .thinking-time {
      position: relative;
      display: inline-block;
      overflow: hidden;
      color: var(--color-thinking-time);
    }

    .thinking-chain[data-role="streaming-thinking"] .thinking-time::after {
      content: '';
      position: absolute;
      top: 0;
      width: 80%;
      height: 100%;
      background: linear-gradient(90deg,
          transparent 0%,
          rgba(255, 255, 255, 0.01) 1%,
          rgba(255, 255, 255, 0.6) 50%,
          rgba(255, 255, 255, 0.01) 99%,
          transparent 100%);
      animation: lightSweep 4s ease-in-out infinite;
      pointer-events: none;
    }

    @keyframes lightSweep {
      0% {
        left: -80%;
      }

      100% {
        left: 100%;
      }
    }

    /* 完成态时间文字 */
    .thinking-time.completed {
      color: var(--color-thinking-time);
      font-size: 0.85rem;
      font-weight: 350;
      font-family: 'Times new roman', serif;
    }

    /* ★ 思考内容 */
    .thinking-content {
      display: none;
      margin-top: 0.1rem;
      padding: 1.0rem 0.7rem 1rem 0.7rem;
      border-top: none;
      position: relative;
      font-family: 'Cormorant Garamond', serif;
      font-size: 0.85rem;
      color: var(--color-thinking-content);
      line-height: 1.8;
      white-space: pre-wrap;
      word-break: break-word;
    }

    .thinking-content::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 0.5px;
      background: linear-gradient(to right, var(--color-thinking-content-line-start) 1%, var(--color-thinking-content-line-mid) 15%, var(--color-thinking-content-line-end) 80%, var(--color-thinking-content-line-start) 100%);
    }

    .thinking-chain.expanded .thinking-content {
      display: block;
      animation: thinkFadeIn 0.3s var(--ease-out-expo) forwards;
    }

    .thinking-chain.closing .thinking-content {
      display: block;
      animation: thinkFadeOut 0.25s var(--ease-out-expo) forwards;
    }

    /* 气泡 */
    .msg-bubble {
      max-width: 92%;
      padding: 0.8rem 1.1rem;
      border-radius: 18px;
      font-size: 0.9rem;
      font-weight: 320;
      line-height: 2.4;
      letter-spacing: 0.05em;
      word-break: break-word;
      position: relative;
    }

    .msg-wrapper.assistant .msg-bubble {
      background: transparent;
      border: none;
      border-radius: 0;
      color: var(--color-msg-assistant-text);
      box-shadow: none;
      padding: 0.3rem 0;
      max-width: 100%;
      width: 100%;
      overflow-wrap: break-word;
      word-break: break-word;
    }

    /* —— 用户气泡 · 透明度/模糊度叠加（JS 设置 CSS 变量）—— */
    html {
      --user-bubble-blur: 4px;
    }
    .msg-wrapper.user .msg-bubble {
      background: var(--color-msg-user-bg);
      backdrop-filter: blur(var(--user-bubble-blur, 4px));
      -webkit-backdrop-filter: blur(var(--user-bubble-blur, 4px));
      border: 0.5px solid var(--color-msg-user-border);
      border-radius: 30px 6px 30px 30px;
      color: var(--color-msg-user-text);
      box-shadow: 0 2px 10px var(--color-msg-user-shadow), 0 0 0 0.5px var(--color-msg-user-shadow-line);
      padding-left: 1.5rem;
      padding-right: 1.5rem;
      padding-top: 0.5rem;
      padding-bottom: 0.5rem;
      position: relative;
    }

    /* 用户气泡不透明度增强层：0.50=不改变，>0.50=更不透明，<0.50=更透明（×4 倍率）*/
    .msg-wrapper.user .msg-bubble::after {
      content: '';
      position: absolute;
      inset: 0;
      border-radius: inherit;
      background: rgba(255, 252, 248, 0.92);
      opacity: calc((var(--user-bubble-opacity, 0.5) - 0.5) * 4);
      pointer-events: none;
      z-index: 0;
    }

    .msg-bubble h1,
    .msg-bubble h2,
    .msg-bubble h3 {
      font-family: 'Cormorant Garamond', serif;
      font-weight: 500;
      margin: 0.8em 0 0.4em;
      line-height: 2;
      color: var(--color-msg-assistant-heading);
    }

    .msg-bubble h1 {
      font-size: 1.3rem;
    }

    .msg-bubble h2 {
      font-size: 1.1rem;
    }

    .msg-bubble h3 {
      font-size: 0.95rem;
    }

    .msg-bubble h1:first-child,
    .msg-bubble h2:first-child,
    .msg-bubble h3:first-child {
      margin-top: 0;
    }

    .msg-bubble p {
      margin: 1.2em 0;
    }

    .msg-bubble p:first-child {
      margin-top: 0;
    }

    .msg-bubble p:last-child {
      margin-bottom: 0;
    }

    .msg-bubble strong {
      font-weight: 500;
      color: var(--color-msg-assistant-strong);
    }

    .msg-bubble em {
      font-style: italic;
      color: var(--color-msg-assistant-em);
    }

    .msg-bubble code {
      background: var(--color-msg-assistant-code-bg);
      padding: 2px 6px;
      border-radius: 4px;
      font-family: 'SF Mono', 'Cascadia Code', 'Consolas', monospace;
      font-size: 0.82em;
      color: var(--color-msg-assistant-code);
    }

    .msg-wrapper.user .msg-bubble code {
      background: var(--color-msg-user-code-bg);
      color: var(--color-msg-user-code);
    }

    .msg-wrapper.user .msg-bubble strong {
      color: var(--color-msg-user-strong);
    }

    .msg-wrapper.user .msg-bubble em {
      color: var(--color-msg-user-em);
    }

    .msg-bubble ul,
    .msg-bubble ol {
      padding-left: 1.2em;
      margin: 0.4em 0;
    }

    .msg-bubble li {
      margin: 0.2em 0;
    }

    .msg-bubble blockquote {
      border-left: 3px solid var(--color-msg-assistant-blockquote-border);
      padding-left: 0.8em;
      margin: 0.5em 0;
      color: var(--color-msg-assistant-blockquote);
      font-style: italic;
    }

    .msg-bubble hr {
      border: none;
      border-top: 1px solid var(--color-msg-assistant-hr);
      margin: 0.8em 0;
    }

    .msg-bubble table {
      width: 100%;
      border-collapse: collapse;
      margin: 0.6em 0;
      font-size: 0.82em;
    }

    .msg-bubble th {
      background: var(--color-msg-assistant-th-bg);
      padding: 8px 12px;
      text-align: left;
      font-weight: 500;
      color: var(--color-msg-assistant-th-text);
      border-bottom: 1.5px solid var(--color-msg-assistant-th-border);
    }

    .msg-bubble td {
      padding: 6px 12px;
      border-bottom: 0.5px solid var(--color-msg-assistant-td-border);
    }

    .msg-bubble tr:hover td {
      background: var(--color-msg-assistant-tr-hover);
    }

    .msg-wrapper.user .msg-bubble th {
      background: var(--color-msg-user-th-bg);
      color: var(--color-msg-user-th-text);
      border-bottom-color: var(--color-msg-user-th-border);
    }

    .msg-wrapper.user .msg-bubble td {
      border-bottom-color: var(--color-msg-user-td-border);
    }

    .msg-wrapper.user .msg-bubble tr:hover td {
      background: var(--color-msg-user-tr-hover);
    }

    /* ========== 代码块外框（.code-block-wrap）========== */
    .code-block-wrap {
      margin: 0.8em 0;
      border-radius: 14px;
      overflow: hidden;
      background: var(--code-bg);
      border: 0.5px solid var(--code-border);
      box-shadow: 0 1px 6px var(--code-shadow);
    }

    .code-block-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 2px 16px 2px 16px;
      background: var(--code-header-bg);
      border-bottom: 0.5px solid var(--code-border);
    }

    .code-lang-label {
      font-size: 0.68rem;
      font-weight: 400;
      letter-spacing: 0.3px;
      color: var(--code-lang);
      font-family: 'Inter', -apple-system, sans-serif;
      text-transform: lowercase;
    }

    .copy-code-btn {
      background: none;
      border: none;
      cursor: pointer;
      color: var(--code-btn);
      padding: 3px 5px;
      border-radius: 5px;
      transition: all 0.2s;
      display: flex;
      align-items: center;
    }

    .copy-code-btn:hover {
      color: var(--code-btn-hover);
      background: var(--code-btn-hover-bg);
    }

    /* ========== 代码块内层 pre — 必须放在 .msg-bubble pre 之后以覆盖 ========== */
    .msg-bubble .code-block-wrap pre {
      margin: 0;
      padding: 14px 16px;
      border: none;
      border-radius: 0;
      background: transparent;
      color: var(--code-text);
      font-family: 'JetBrains Mono', 'SF Mono', 'Cascadia Code', 'Consolas', 'Menlo', monospace;
      font-size: 0.78em;
      line-height: 1.75;
      overflow-x: auto;
      scrollbar-width: thin;
      scrollbar-color: var(--code-scrollbar-track) transparent;
    }

    .msg-bubble .code-block-wrap pre::-webkit-scrollbar {
      height: 4px;
    }

    .msg-bubble .code-block-wrap pre::-webkit-scrollbar-track {
      background: transparent;
    }

    .msg-bubble .code-block-wrap pre::-webkit-scrollbar-thumb {
      background: var(--code-scrollbar-thumb);
      border-radius: 4px;
    }

    .msg-bubble .code-block-wrap pre code {
      background: transparent;
      padding: 0;
      color: inherit;
      font-size: inherit;
      font-family: inherit;
    }

    /* ========== 裸 pre（未被 code-block-wrap 包裹时）========== */
    .msg-bubble pre {
      margin: 0.6em 0;
      padding: 0.9rem 1rem;
      border-radius: 12px;
      overflow-x: auto;
      font-family: 'SF Mono', 'Cascadia Code', 'Consolas', monospace;
      font-size: 0.8em;
      line-height: 1.6;
      background: var(--code-bg);
      color: var(--code-text);
      border: 0.5px solid var(--code-border);
    }

    .msg-bubble pre code {
      background: transparent;
      padding: 0;
      color: inherit;
      font-size: inherit;
    }

    .msg-wrapper.user .msg-bubble .code-block-wrap {
      background: var(--code-bg-user);
      border-color: var(--code-border-user);
    }

    .msg-wrapper.user .msg-bubble .code-block-header {
      background: var(--code-header-bg-user);
      border-bottom-color: var(--code-border-user);
    }

    .msg-wrapper.user .msg-bubble .code-lang-label {
      color: var(--code-lang-user);
    }

    .msg-wrapper.user .msg-bubble .copy-code-btn {
      color: var(--code-btn-user);
    }

    .msg-wrapper.user .msg-bubble .copy-code-btn:hover {
      color: var(--code-btn-hover-user);
      background: var(--code-btn-hover-bg-user);
    }

    .msg-wrapper.user .msg-bubble .code-block-wrap pre {
      color: var(--code-text-user);
      scrollbar-color: var(--code-scrollbar-thumb-user) transparent;
    }

    .msg-wrapper.user .msg-bubble .code-block-wrap pre::-webkit-scrollbar-thumb {
      background: var(--code-scrollbar-thumb-user);
    }

    .msg-wrapper.user .msg-bubble pre {
      background: var(--code-bg-user);
      color: var(--code-text-user);
      border-color: var(--code-border-user);
    }

    /* 空状态 */
    .empty-state {
      flex: 1;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 0.3rem;
      color: var(--color-chat-empty);
      user-select: none;
      padding: 3rem 0;
    }

    .empty-state .empty-text {
      font-family: 'Cormorant Garamond', serif;
      font-size: 1.3rem;
      font-style: italic;
      letter-spacing: 2px;
    }

    .empty-state .empty-hint {
      font-size: 0.72rem;
      letter-spacing: 1px;
      font-weight: 300;
    }

    /* 输入区 */
    .chat-input-area {
      position: fixed;
      bottom: 0;
      z-index: 30;
      padding: 0 1rem 2.5rem;
      pointer-events: none;
      transform: translateX(var(--msg-shift, 0));
      transition: transform 0.4s var(--ease-out-expo);
    }

    .chat-input-area>* {
      pointer-events: auto;
    }

    .chat-input-wrap {
      background: var(--color-input-wrap-bg);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border: 0.5px solid var(--color-input-wrap-border);
      border-radius: 30px;
      padding: 1.5rem 1.5rem 0.7rem;
      box-shadow: 0 8px 28px var(--color-input-wrap-shadow), inset 0 0 0 0.6px var(--color-input-wrap-shadow-inner);
      transition: border-color 0.3s, box-shadow 0.3s;
      position: relative;
    }

    .chat-input-wrap:focus-within {
      border-color: var(--color-input-wrap-focus-border);
      box-shadow: 0 8px 32px var(--color-input-wrap-focus-shadow), inset 0 0 0 0.5px var(--color-input-wrap-focus-inner);
    }

    .chat-textarea {
      width: 100%;
      /* 桌面端默认两行：0.9rem 字号 × 2.4 行高 × 2 行（rows="1" 后由 min-height 接管默认高度） */
      min-height: 4.32rem;
      max-height: 14em;
      border: none;
      background: transparent;
      font-family: 'Inter', sans-serif;
      font-size: 0.9rem;
      font-weight: 320;
      line-height: 2.4;
      letter-spacing: 0.05em;
      color: var(--color-input-textarea);
      text-shadow: 0 0.5px 0 var(--color-input-textarea-shadow);
      padding: 0 14px;
      resize: none;
      outline: none;
      scrollbar-width: thin;
    }

    .chat-textarea::placeholder {
      color: var(--color-input-textarea-placeholder);
      font-style: italic;
    }

    .chat-input-toolbar {
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-top: 0.3rem;
      padding-left: 0.1rem;
      padding-right: 0.1rem;
    }

    .toolbar-left {
      display: flex;
      gap: 8px;
    }

    .tool-btn {
      width: 34px;
      height: 34px;
      border-radius: 50%;
      border: none;
      background: transparent;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--color-input-tool-btn);
      transition: all 0.25s var(--ease-out-expo);
    }

    .tool-btn:hover {
      background: var(--color-input-tool-btn-hover-bg);
      color: var(--color-input-tool-btn-hover);
    }

    .tool-btn svg {
      width: 20px;
      height: 20px;
    }

    .whale-btn .whale-icon {
      width: 30px;
      height: 30px;
      border-radius: 2px;
      object-fit: contain;
      opacity: var(--color-input-whale-opacity);
      transition: all 0.25s var(--ease-out-expo);
    }

    .whale-btn:hover .whale-icon {
      opacity: var(--color-input-whale-hover-opacity);
      filter: drop-shadow(0 0 8px var(--color-input-whale-hover-glow1)) drop-shadow(0 0 16px var(--color-input-whale-hover-glow2));
      transform: scale(1.08);
    }

    .btn-expand-input {
      position: absolute;
      top: 0.6rem;
      right: 0.7rem;
      width: 24px;
      height: 24px;
      border: none;
      background: transparent;
      cursor: pointer;
      color: var(--color-input-expand);
      display: flex;
      align-items: center;
      justify-content: center;
      transition: color 0.3s var(--ease-out-expo);
    }

    /* 仅在有真实 hover 能力的设备（鼠标）上显现；触屏点按会让 :hover 粘住，导致按钮常驻显示 */
    @media (hover: hover) {
      .btn-expand-input:hover {
        color: var(--color-input-expand-hover);
      }
    }

    .btn-expand-input svg {
      width: 16px;
      height: 16px;
    }

    .btn-send {
      width: 42px;
      height: 42px;
      border: none;
      background: transparent;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--color-input-send);
      transition: all 0.25s var(--ease-out-expo);
      position: relative;
      margin-right: 3px;
      margin-bottom: 6px;
      transform: translateY(-6px);
    }

    .btn-send:hover {
      background: transparent;
      color: var(--color-input-send-hover);
      filter: drop-shadow(0 0 10px var(--color-input-send-hover-glow));
      transform: translateY(-6px) scale(1.08);
    }

    .btn-send:active {
      transform: translateY(-6px) scale(0.92);
    }

    .btn-send svg {
      width: 50px;
      height: 50px;
    }

    .setting-row {
      display: flex;
      flex-direction: column;
      gap: 0.35rem;
    }

    .setting-label {
      font-size: 0.72rem;
      font-weight: 320;
      letter-spacing: 1.5px;
      color: var(--color-setting-label);
    }

    .input-with-eye {
      display: flex;
      align-items: center;
      gap: 0;
      background: var(--color-setting-input-bg);
      border: 0.5px solid var(--color-setting-input-border);
      border-radius: 12px;
      overflow: hidden;
      transition: border-color 0.25s;
    }

    .input-with-eye:focus-within {
      border-color: var(--color-setting-input-border-focus);
    }

    .input-with-eye input {
      flex: 1;
      border: none;
      background: transparent;
      padding: 8px 12px;
      font-family: 'Inter', monospace, sans-serif;
      font-size: 0.8rem;
      font-weight: 300;
      color: var(--color-setting-input-text);
      outline: none;
      letter-spacing: 0.5px;
    }

    .input-with-eye input::placeholder {
      color: var(--color-setting-input-placeholder);
    }

    .btn-eye {
      width: 32px;
      height: 32px;
      border: none;
      background: transparent;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--color-setting-eye);
      transition: color 0.2s;
      margin-right: 2px;
    }

    .btn-eye:hover {
      color: var(--color-setting-eye-hover);
    }

    .setting-select {
      width: 100%;
      padding: 8px 12px;
      border-radius: 10px;
      border: 0.5px solid var(--color-setting-select-border);
      background: var(--color-setting-select-bg);
      font-family: 'Inter', sans-serif;
      font-size: 0.82rem;
      font-weight: 300;
      color: var(--color-setting-select-text);
      outline: none;
      cursor: pointer;
      transition: border-color 0.25s;
      appearance: none;
      -webkit-appearance: none;
      background-image: url("data:image/svg+xml,%3Csvg width='10' height='6' viewBox='0 0 10 6' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1l4 4 4-4' stroke='%23757CB1' stroke-width='1.2' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
      background-repeat: no-repeat;
      background-position: right 12px center;
      padding-right: 30px;
    }

    .setting-select:focus {
      border-color: var(--color-setting-select-border-focus);
    }

    /* ========== 移动端适配 ========== */
    @media (max-width: 800px) {
      /* 聊天窗全宽 */
      .chat-window {
        margin-right: 0 !important;
        width: 100%;
      }

      /* 标题栏缩小但保留顶部空间（含状态栏安全区） */
      .chat-header {
        padding: calc(2.2rem + env(safe-area-inset-top, 0px)) 1.2rem 0.8rem;
        max-width: 100%;
      }

      .chat-title {
        font-size: 1.15rem;
        font-weight: 450;
        letter-spacing: 2px;
        padding-left: 0;
        flex: 1;
        text-align: left;
      }

      .chat-subtitle {
        font-size: 0.62rem;
        letter-spacing: 1px;
        margin-top: 6px;
        padding-left: 0;
      }

      .chat-title-line {
        margin-top: 6px;
      }

      /* 移动端专属：左右头像按钮 */
      .mobile-avatar-btn {
        display: flex;
        align-items: center;
        justify-content: center;
        width: 34px;
        height: 34px;
        border-radius: 50%;
        background: rgba(168, 148, 112, 0.08);
        border: 0.5px solid rgba(168, 148, 112, 0.15);
        color: var(--color-chat-title-btn);
        cursor: pointer;
        flex-shrink: 0;
        transition: background 0.25s, border-color 0.25s;
      }

      .mobile-avatar-btn:hover, .mobile-avatar-btn:active {
        background: rgba(168, 148, 112, 0.16);
        border-color: rgba(168, 148, 112, 0.28);
      }

      .mobile-avatar-btn svg {
        width: 16px;
        height: 16px;
      }

      .mobile-agent-btn {
        margin-right: 10px;
      }

      .mobile-user-btn {
        margin-left: 10px;
      }

      /* 聊天内容区加左右边距 */
      .chat-body {
        padding-left: 20px;
        padding-right: 20px;
        padding-bottom: 140px;
      }

      .chat-body-inner {
        padding-left: 0;
        padding-right: 0;
      }

      /* 消息气泡适配：窄屏气泡占满（用户/助手/思考链均 100% 宽） */
      .msg-wrapper {
        padding: 0 6px;
      }

      .msg-bubble {
        max-width: 100%;
        font-size: 0.84rem;
        line-height: 2.2;
      }

      .thinking-chain {
        max-width: 100%;
      }

      .msg-wrapper.user .msg-bubble {
        max-width: 100%;
        padding-left: 1.2rem;
        padding-right: 1.2rem;
        border-radius: 24px 5px 24px 24px;
      }

      .msg-wrapper.assistant .msg-bubble {
        max-width: 100%;
      }

      /* 输入区适配：移动端默认单行（rows="1" + min-height = 一行行高 + 上下 padding），超出由 JS 自动伸长 */
      .chat-input-area {
        padding: 0 7px calc(20px + env(safe-area-inset-bottom, 0px));
      }

      .chat-input-wrap {
        padding: 6px 10px 6px 14px;
      }

      .chat-textarea {
        /* 默认单行：0.9rem 字号（与消息一致）× 1.8 行高 + 上下 padding（12px + 2px） */
        min-height: calc(0.9rem * 1.8 + 14px);
        font-size: 0.9rem;
        line-height: 1.8;
        padding: 12px 14px 2px;
        /* PWA 隐藏滚动条（保留触摸滚动能力，不显示滚动条） */
        scrollbar-width: none;
        -ms-overflow-style: none;
      }

      .chat-textarea::-webkit-scrollbar {
        display: none;
      }

      .chat-input-toolbar {
        padding: 2px 0;
      }

      .btn-send svg {
        width: 36px;
        height: 36px;
      }

      .tool-btn svg {
        width: 20px;
        height: 20px;
      }

      /* 标题操作按钮移动端：默认脱离文档流，不占宽度；长按才滑出 */
      .chat-header-row {
        position: relative;
        overflow: visible;
      }

      .chat-title-actions {
        position: absolute;
        right: 0;
        top: 50%;
        transform: translateY(-50%);
        opacity: 0;
        pointer-events: none;
        gap: 10px;
        margin-left: 0;
        white-space: nowrap;
      }

      /* 桌面端恢复原有 hover 行为由 min-width 覆盖，这里仅限移动端 */
      .chat-header:hover .chat-title-actions {
        opacity: 0;
        pointer-events: none;
      }

      /* 提高优先级，盖过上面 .chat-header:hover 的隐藏规则（触屏粘性 hover 下也能滑出） */
      .chat-header .chat-title-actions.mobile-slide-out {
        opacity: 1;
        pointer-events: auto;
        background: var(--color-chat-input-bg);
        backdrop-filter: blur(16px);
        -webkit-backdrop-filter: blur(16px);
        border: 0.5px solid rgba(168, 148, 112, 0.2);
        border-radius: 22px;
        padding: 6px 12px;
        box-shadow: 0 4px 20px rgba(0, 0, 0, 0.18);
        animation: titleActionsSlideOut 0.28s var(--ease-out-expo) forwards;
      }

      @keyframes titleActionsSlideOut {
        from {
          opacity: 0;
          transform: translateY(-50%) translateX(12px);
        }
        to {
          opacity: 1;
          transform: translateY(-50%) translateX(0);
        }
      }
    }

    /* 桌面端：隐藏移动端头像按钮 */
    @media (min-width: 801px) {
      .mobile-avatar-btn {
        display: none;
      }
    }