/* ============================================================
   AdAgent Web —— 千问网页版风格设计系统
   清爽浅色主题 · 紫蓝主色 · 大圆角 · 细腻阴影
   ============================================================ */

:root {
  /* 主色（千问紫蓝） */
  --brand: #615ced;
  --brand-strong: #4b3fe0;
  --brand-soft: #efedfd;
  --brand-grad: linear-gradient(135deg, #615ced 0%, #8b5cf6 100%);
  /* 中性色 */
  --bg: #ffffff;
  --bg-subtle: #f7f7fb;
  --bg-hover: #f0f0f7;
  --ink: #1f1f2e;
  --ink-2: #4b4b5e;
  /* 对比度：在 --bg-subtle 上由此前的 3.2:1 提升到 4.8:1，满足 WCAG AA */
  --muted: #6b6b80;
  --line: #e8e8f0;
  /* 嵌套卡片描边：气泡(#f7f7fb)内的卡片用品牌淡边提亮层级，避免"三层白"糊在一起 */
  --card-line: rgba(97, 92, 237, 0.20);
  /* 语义色 */
  --success: #16a34a;
  --success-soft: #ecfdf3;
  --danger: #dc2626;
  --danger-soft: #fef2f2;
  --warning: #d97706;
  --warning-soft: #fffbeb;
  /* 阴影 */
  --shadow-sm: 0 1px 2px rgba(31, 31, 46, 0.05);
  --shadow-md: 0 4px 16px rgba(31, 31, 46, 0.08);
  --shadow-lg: 0 12px 40px rgba(31, 31, 46, 0.12);
  --shadow-brand: 0 4px 14px rgba(97, 92, 237, 0.35);
  /* 尺寸 */
  --radius: 16px;
  --radius-sm: 10px;
  --radius-pill: 999px;
  --sidebar-w: 264px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Microsoft YaHei", "Noto Sans SC", Roboto, Helvetica, Arial, sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
[hidden] { display: none !important; }
html, body { height: 100%; }
body {
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  font-size: 15px;
  line-height: 1.6;
  overflow: hidden;
}

.app { display: flex; height: 100vh; }

/* ============ 侧边栏 ============ */
.sidebar {
  width: var(--sidebar-w);
  flex: none;
  background: var(--bg);
  border-right: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  padding: 14px 12px 10px;
  transition: margin-left 0.2s ease;
}
.sidebar.hidden { margin-left: calc(var(--sidebar-w) * -1); }

.side-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 4px 6px 14px;
}
.side-logo {
  width: 32px; height: 32px;
  border-radius: 9px;
  background: var(--brand-grad);
  color: #fff;
  font-weight: 800;
  display: flex; align-items: center; justify-content: center;
  font-size: 15px;
  box-shadow: var(--shadow-brand);
}
.side-name { font-weight: 700; font-size: 17px; letter-spacing: -0.01em; }
.side-collapse {
  margin-left: auto;
  border: none; background: transparent;
  color: var(--muted); font-size: 15px;
  cursor: pointer; padding: 4px 8px; border-radius: 8px;
}
.side-collapse:hover { background: var(--bg-hover); color: var(--ink); }

.btn-new-chat {
  border: 1px solid var(--line);
  background: var(--bg);
  border-radius: 12px;
  padding: 10px 14px;
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
  cursor: pointer;
  text-align: left;
  transition: all 0.15s ease;
  margin-bottom: 14px;
}
.btn-new-chat:hover { border-color: var(--brand); color: var(--brand); background: var(--brand-soft); }

.side-nav { display: flex; flex-direction: column; gap: 2px; margin-bottom: 16px; }
.nav-item {
  width: 100%;
  text-align: left;
  border: none;
  background: transparent;
  font-family: var(--font);
  padding: 9px 12px;
  border-radius: 10px;
  font-size: 14px;
  color: var(--ink-2);
  cursor: pointer;
  transition: all 0.13s ease;
  user-select: none;
}
.nav-item:hover { background: var(--bg-hover); }
.nav-item.active { background: var(--brand-soft); color: var(--brand-strong); font-weight: 650; }

.side-section-title {
  display: flex; justify-content: space-between; align-items: center;
  font-size: 12px; color: var(--muted);
  padding: 0 8px 6px;
}
.link-btn { border: none; background: none; color: var(--muted); cursor: pointer; font-size: 13px; }
.link-btn:hover { color: var(--brand); }

.side-history {
  flex: 1;
  overflow-y: auto;
  display: flex; flex-direction: column; gap: 2px;
}
.side-empty { color: var(--muted); font-size: 13px; padding: 10px 8px; }

/* 历史条目：整行由一个可聚焦按钮 + 删除按钮组成（避免按钮嵌套按钮） */
.hist-row { display: flex; align-items: center; gap: 2px; border-radius: 9px; }
.hist-row:hover { background: var(--bg-hover); }
.hist-item {
  flex: 1;
  min-width: 0;
  border: none;
  background: transparent;
  font-family: var(--font);
  text-align: left;
  padding: 8px 10px;
  border-radius: 9px;
  font-size: 13px;
  color: var(--ink-2);
  cursor: pointer;
  display: flex; align-items: center; gap: 8px;
  white-space: nowrap; overflow: hidden;
}
.hist-label { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; }
.hist-item .hist-id {
  flex: none;
  font-size: 11px;
  color: var(--muted);
  background: var(--bg-subtle);
  border-radius: 6px;
  padding: 1px 6px;
}
.hist-badge {
  flex: none; font-size: 11px; border-radius: var(--radius-pill); padding: 1px 7px;
  letter-spacing: 0.01em;
}
.hist-badge.success { color: var(--success); background: var(--success-soft); }
.hist-badge.failed { color: var(--danger); background: var(--danger-soft); }
.hist-badge.running { color: var(--brand); background: var(--brand-soft); }
.hist-badge.other { color: var(--muted); background: var(--bg-subtle); }

/* 历史条目删除按钮：默认隐藏，悬停/聚焦条目时浮现 */
.hist-del {
  flex: none;
  width: 22px; height: 22px;
  margin-right: 4px;
  border: none; border-radius: 6px;
  background: transparent;
  color: var(--muted);
  font-size: 11px; line-height: 1;
  cursor: pointer;
  opacity: 0;
  transition: all 0.13s ease;
}
.hist-row:hover .hist-del,
.hist-del:focus-visible { opacity: 1; }
.hist-del:hover { background: var(--danger-soft); color: var(--danger); }

.side-footer {
  display: flex; align-items: center; gap: 8px;
  font-size: 12px; color: var(--muted);
  padding: 10px 8px 2px;
  border-top: 1px solid var(--line);
  margin-top: 8px;
}
.dot { width: 8px; height: 8px; border-radius: 50%; background: #d1d1e0; flex: none; }
.dot.ok { background: var(--success); }
.dot.err { background: var(--danger); }

/* ============ 主区域 ============ */
.main { flex: 1; display: flex; flex-direction: column; min-width: 0; }

.topbar {
  height: 54px; flex: none;
  display: flex; align-items: center; gap: 12px;
  padding: 0 20px;
  border-bottom: 1px solid var(--line);
}
.topbar-title { font-weight: 650; font-size: 15px; }

.icon-btn {
  border: none; background: transparent;
  color: var(--ink-2); font-size: 14px;
  padding: 6px 10px; border-radius: 9px; cursor: pointer;
  transition: background 0.13s ease;
}
.icon-btn:hover { background: var(--bg-hover); }

.view { display: none; flex: 1; min-height: 0; flex-direction: column; }
.view.active { display: flex; }

/* ============ 聊天区 ============ */
.chat-scroll {
  flex: 1;
  overflow-y: auto;
  padding: 24px 20px 12px;
}
.messages {
  max-width: 780px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

/* 空状态 */
.empty-state {
  text-align: center;
  padding: 12vh 20px 40px;
}
.empty-logo {
  width: 56px; height: 56px;
  margin: 0 auto 18px;
  border-radius: 16px;
  background: var(--brand-grad);
  color: #fff;
  font-size: 26px; font-weight: 800;
  display: flex; align-items: center; justify-content: center;
  box-shadow: var(--shadow-brand);
}
.empty-state h1 { font-size: 24px; font-weight: 700; letter-spacing: -0.01em; }
.empty-sub { color: var(--muted); margin-top: 8px; font-size: 14px; line-height: 1.7; }
.empty-state .empty-chips {
  display: flex; justify-content: center; flex-wrap: wrap; gap: 8px;
  margin-top: 22px;
}
.empty-state .empty-chip {
  font-size: 12px;
  color: var(--brand-strong);
  background: var(--brand-soft);
  border: 1px solid var(--card-line);
  border-radius: var(--radius-pill);
  padding: 5px 13px;
}
.empty-hint { margin-top: 16px; font-size: 12px; color: var(--muted); opacity: 0.85; }

/* 消息气泡 */
.msg { display: flex; gap: 10px; }
.msg .avatar {
  flex: none;
  width: 30px; height: 30px;
  border-radius: 9px;
  display: flex; align-items: center; justify-content: center;
  font-size: 13px; font-weight: 700;
  margin-top: 2px;
}
.msg.bot .avatar { background: var(--brand-grad); color: #fff; }
.msg.user { flex-direction: row-reverse; }
.msg.user .avatar { background: var(--bg-hover); color: var(--ink-2); }

.bubble {
  max-width: 82%;
  padding: 10px 14px;
  border-radius: 14px;
  font-size: 14.5px;
  word-break: break-word;
}
.msg.bot .bubble { background: var(--bg-subtle); border-top-left-radius: 4px; }
.msg.user .bubble {
  background: var(--brand);
  color: #fff;
  border-top-right-radius: 4px;
  box-shadow: var(--shadow-brand);
}
.bubble .msg-img { max-width: 220px; border-radius: 10px; display: block; margin-top: 6px; }

/* 卡片（嵌在气泡内）：品牌淡描边 + 更清晰的一层投影，与浅色气泡区隔 */
.card {
  background: #fff;
  border: 1px solid var(--card-line);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  margin-top: 8px;
  box-shadow: var(--shadow-md);
  transition: border-color 0.13s ease, box-shadow 0.13s ease;
}
.card-title { font-weight: 700; font-size: 14px; margin-bottom: 10px; display: flex; align-items: center; gap: 6px; }

.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px 14px; }
.form-grid .full { grid-column: 1 / -1; }
.field label { display: block; font-size: 12px; color: var(--muted); margin-bottom: 3px; }
.text-input, .field input, .field select, .field textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 9px;
  padding: 7px 10px;
  font-size: 13.5px;
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  outline: none;
  transition: border-color 0.13s ease, box-shadow 0.13s ease;
}
.text-input:focus, .field input:focus, .field select:focus, .field textarea:focus {
  border-color: var(--brand);
  box-shadow: 0 0 0 3px rgba(97, 92, 237, 0.12);
}
.field textarea { resize: vertical; min-height: 64px; }

.risk-banner {
  margin-top: 10px;
  background: var(--warning-soft);
  border: 1px solid #fde68a;
  color: var(--warning);
  border-radius: 9px;
  padding: 8px 12px;
  font-size: 13px;
}

.card-actions { display: flex; gap: 10px; margin-top: 12px; flex-wrap: wrap; }

.btn {
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink-2);
  border-radius: 10px;
  padding: 8px 16px;
  font-size: 13.5px;
  font-weight: 600;
  cursor: pointer;
  font-family: var(--font);
  transition: all 0.14s ease;
}
.btn:hover { border-color: var(--brand); color: var(--brand); }
.btn.primary {
  background: var(--brand-grad);
  border: none;
  color: #fff;
  box-shadow: var(--shadow-brand);
}
.btn.primary:hover { filter: brightness(1.06); transform: translateY(-1px); }
.btn.danger:hover { border-color: var(--danger); color: var(--danger); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none !important; }

/* 按压反馈：按下瞬间轻微下沉 + 收阴影，形成"摁下去"的手感。
   仅对可交互元素生效；disabled 由上方 !important 覆盖，不误伤。 */
.btn:active,
.chip:active,
.chip-btn:active,
.nav-item:active,
.icon-btn:active,
.round-btn:active,
.side-collapse:active,
.btn-new-chat:active,
.link-btn:active { transform: translateY(1px); }
.btn.primary:active,
.round-btn.primary:active {
  transform: translateY(1px);
  box-shadow: 0 2px 8px rgba(97, 92, 237, 0.28);
}
.gallery-item:active img { transform: scale(0.99); }
.hist-item:active,
.hist-del:active { transform: scale(0.98); }

/* 进度条 */
.progress-card { padding: 12px 14px; }
.progress-wrap { margin-top: 8px; }
.progress-track {
  height: 7px;
  border-radius: 999px;
  background: var(--bg-hover);
  overflow: hidden;
}
.progress-fill {
  height: 100%;
  border-radius: 999px;
  background: var(--brand-grad);
  width: 0%;
  transition: width 0.4s ease;
}
.progress-meta {
  display: flex; justify-content: space-between;
  font-size: 12px; color: var(--muted); margin-top: 4px;
}
.steps-line { display: flex; align-items: center; gap: 4px; margin-top: 8px; flex-wrap: wrap; }
.step-tag {
  flex: 0 0 auto; min-width: 0;
  display: inline-flex; align-items: center; justify-content: center; gap: 3px;
  font-size: 11px;
  border-radius: var(--radius-pill);
  padding: 2px 8px;
  background: var(--bg-hover);
  color: var(--muted);
  transition: all 0.2s ease;
}
.step-tag .step-idx {
  flex: none; width: 13px; height: 13px; border-radius: 50%;
  display: inline-flex; align-items: center; justify-content: center;
  background: #fff; color: var(--muted); font-size: 9px; font-weight: 700;
  border: 1px solid var(--line); font-style: normal;
}
.step-tag .step-name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.step-tag.done { background: var(--success-soft); color: var(--success); }
.step-tag.done .step-idx { background: var(--success); color: #fff; border-color: var(--success); }
.step-tag.active { background: var(--brand-soft); color: var(--brand-strong); font-weight: 650; }
.step-tag.active .step-idx { background: var(--brand); color: #fff; border-color: var(--brand); }

/* 文案结果 */
.copy-item { border-top: 1px dashed var(--line); padding-top: 12px; margin-top: 12px; }
.copy-item:first-of-type { border-top: none; padding-top: 0; margin-top: 0; }
.copy-head { display: flex; align-items: center; gap: 8px; margin-bottom: 6px; flex-wrap: wrap; }
.copy-head h4 { font-size: 14.5px; }
.copy-headline { font-weight: 700; font-size: 15px; }
.copy-sub { color: var(--ink-2); font-size: 13.5px; margin: 2px 0 6px; }
.copy-bullets { padding-left: 18px; font-size: 13.5px; color: var(--ink-2); }
.copy-bullets li { margin: 2px 0; }
.copy-cta {
  display: inline-block;
  margin-top: 8px;
  background: var(--brand-soft);
  color: var(--brand-strong);
  border-radius: var(--radius-pill);
  padding: 3px 12px;
  font-size: 13px;
  font-weight: 650;
}
.copy-tags { margin-top: 6px; font-size: 12px; color: var(--muted); }
.copy-tags .tag {
  display: inline-block;
  background: var(--bg-subtle);
  border-radius: 6px;
  padding: 1px 7px;
  margin: 2px 3px 0 0;
}
.badge {
  font-size: 11.5px;
  border-radius: var(--radius-pill);
  padding: 2px 9px;
  font-weight: 650;
}
.badge.success { background: var(--success-soft); color: var(--success); }
.badge.failed { background: var(--danger-soft); color: var(--danger); }
.badge.neutral { background: var(--bg-hover); color: var(--muted); }

.copy-tools { display: flex; gap: 8px; margin-top: 8px; flex-wrap: wrap; align-items: center; }
.copy-tools .text-input { width: 220px; font-size: 13px; padding: 6px 10px; }

/* 重生成广告图：风格快捷 chip + 自由输入 + 按钮 */
.regen-tools { margin-top: 6px; }
.regen-tools .chip-row { display: flex; gap: 6px; flex-wrap: wrap; }
.regen-tools .chip-btn {
  border: 1px dashed var(--line);
  background: var(--bg-subtle);
  color: var(--ink-2);
  font-size: 12.5px;
  padding: 4px 11px;
  border-radius: var(--radius-pill);
  cursor: pointer;
  font-family: var(--font);
  transition: all 0.13s ease;
}
.regen-tools .chip-btn:hover { background: var(--brand-soft); color: var(--brand-strong); border-color: var(--brand); }
.regen-input { flex: 1; min-width: 240px; font-size: 13px; }

/* 图片画廊 */
.gallery { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 10px; margin-top: 8px; }
.gallery-item {
  border: 1px solid var(--line);
  border-radius: 10px;
  overflow: hidden;
  background: var(--bg-subtle);
  position: relative;
}
.gallery-item img { width: 100%; height: 130px; object-fit: cover; display: block; cursor: zoom-in; transition: transform 0.2s ease; }
.gallery-item:hover img { transform: scale(1.04); }
.gallery-item::after {
  content: "🔍";
  position: absolute;
  top: 6px; right: 6px;
  width: 24px; height: 24px;
  border-radius: 8px;
  background: rgba(20, 20, 35, 0.45);
  color: #fff;
  font-size: 12px;
  display: flex; align-items: center; justify-content: center;
  opacity: 0;
  transition: opacity 0.15s ease;
  pointer-events: none;
}
.gallery-item:hover::after { opacity: 1; }
.gallery-meta {
  display: flex; justify-content: space-between; align-items: center;
  padding: 6px 8px;
  font-size: 11.5px; color: var(--muted);
}
.gallery-meta a { color: var(--brand); text-decoration: none; font-weight: 600; }
.gallery-meta .muted { color: var(--muted); }
/* 图片占位块：地址缺失 / 加载失败时替代破图，保持网格高度一致 */
.gallery-ph {
  width: 100%; height: 130px;
  display: flex; align-items: center; justify-content: center;
  background: var(--bg-subtle);
  color: var(--muted);
  font-size: 12.5px;
  border-bottom: 1px dashed var(--line);
}

/* 错误卡片 */
.error-card { background: var(--danger-soft); border: 1px solid #fecaca; }
.error-card .card-title { color: var(--danger); }

/* ============ 骨架屏 / 长任务加载态 ============
   为什么需要：产品识别（最长 120s）与广告生成（9 阶段）期间，界面上此前
   只有一行「正在识别产品…」，用户无法区分「在跑」和「卡死」。骨架屏用形状
   预告即将出现的内容，加载条的阶段文案与秒表则让长任务有可读的进展。
   动画统一走 shimmer / dot-pulse，遵循 prefers-reduced-motion（见文件末尾）。 */

.skeleton {
  --sk-base: var(--bg-subtle);
  --sk-hi: #ececf4;
  background-color: var(--sk-base);
  background-image: linear-gradient(90deg, var(--sk-base) 0%, var(--sk-hi) 50%, var(--sk-base) 100%);
  background-size: 200% 100%;
  border-radius: 6px;
  animation: shimmer 1.4s ease-in-out infinite;
}
@keyframes shimmer { 0% { background-position: 200% 0; } 100% { background-position: -200% 0; } }

/* 骨架行：不同宽度模拟文本长短（刻意矮小，避免占画面过大） */
.sk-line { height: 10px; margin: 6px 0; }
.sk-line.w40 { width: 40%; }
.sk-line.w50 { width: 50%; }
.sk-line.w60 { width: 60%; }
.sk-line.w80 { width: 80%; }
.sk-line.w100 { width: 100%; }
.sk-title { height: 14px; width: 46%; margin-bottom: 12px; }

/* 产品识别骨架：两道矮字段网格，不占满整行 */
.sk-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 10px; max-width: 360px; }
.sk-field { display: flex; flex-direction: column; gap: 5px; }
.sk-field.full { grid-column: 1 / -1; }
.sk-label { height: 9px; width: 52px; }
.sk-input { height: 26px; border-radius: var(--radius-sm); }
.sk-area { height: 40px; border-radius: var(--radius-sm); }

/* 结果骨架：预告「文案标题 + 一排缩略图」。刻意矮小，别把生成中的画面撑高 */
.sk-title-line { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; }
.sk-title-line .w60 { width: 46%; }
.sk-gallery-row {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(72px, 1fr)); gap: 8px;
  max-width: 260px;
}
.sk-thumb { border-radius: var(--radius-sm); overflow: hidden; }
.sk-thumb-in { display: block; width: 100%; aspect-ratio: 1 / 1; border-radius: var(--radius-sm); }

/* 长任务加载条：圆点在跑 + 阶段文案 + 已用时长 */
.loading-bar {
  display: flex; align-items: center; gap: 9px;
  color: var(--muted); font-size: 13.5px;
}
.loading-dots { display: inline-flex; gap: 4px; flex: none; }
.loading-dots i {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--brand); opacity: 0.35;
  animation: dot-pulse 1.2s ease-in-out infinite;
}
.loading-dots i:nth-child(2) { animation-delay: 0.15s; }
.loading-dots i:nth-child(3) { animation-delay: 0.3s; }
@keyframes dot-pulse { 0%, 100% { opacity: 0.25; transform: scale(0.85); } 50% { opacity: 1; transform: scale(1.15); } }

/* 已用时长：等宽数字避免逐秒跳动时抖行 */
.loading-elapsed { font-variant-numeric: tabular-nums; color: var(--muted); opacity: 0.8; }

/* 超时提示：同一套加载 UI 里追加一行「仍在处理」的安抚文案 */
.loading-note { display: block; margin-top: 8px; font-size: 12.5px; color: var(--warning); }

/* ============ 底部输入框 ============ */
.composer-wrap {
  flex: none;
  padding: 6px 20px 14px;
  background: linear-gradient(to top, var(--bg) 70%, transparent);
}
.composer {
  max-width: 780px;
  margin: 0 auto;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 20px;
  box-shadow: var(--shadow-md);
  padding: 10px 12px 12px;
}
.composer:focus-within { border-color: var(--brand); box-shadow: 0 0 0 3px rgba(97, 92, 237, 0.1), var(--shadow-md); }

.chips { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 8px; }
.chip {
  border: none;
  background: var(--bg-subtle);
  color: var(--ink-2);
  font-size: 12.5px;
  padding: 4px 11px;
  border-radius: var(--radius-pill);
  cursor: pointer;
  font-family: var(--font);
  transition: all 0.13s ease;
}
.chip:hover { background: var(--brand-soft); color: var(--brand-strong); }

.input-row { display: flex; align-items: flex-end; gap: 8px; }
.composer-input {
  flex: 1;
  border: none;
  outline: none;
  resize: none;
  font-size: 15px;
  line-height: 1.5;
  font-family: var(--font);
  color: var(--ink);
  background: transparent;
  padding: 7px 2px;
  max-height: 132px;
  overflow-y: auto;
}
.composer-input::placeholder { color: var(--muted); }
.round-btn {
  flex: none;
  width: 36px; height: 36px;
  border-radius: 50%;
  border: none;
  background: var(--bg-hover);
  color: var(--ink-2);
  font-size: 16px;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: all 0.14s ease;
}
.round-btn:hover { background: var(--brand-soft); color: var(--brand); }
.round-btn.primary { background: var(--brand-grad); color: #fff; box-shadow: var(--shadow-brand); }
.round-btn.primary:hover { filter: brightness(1.08); transform: scale(1.05); }

.attach-preview {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 2px 2px 10px;
  padding: 6px 10px 6px 6px;
  background: var(--bg-subtle);
  border: 1px solid var(--line);
  border-radius: 12px;
  width: fit-content;
  max-width: 100%;
}
.attach-preview img {
  height: 44px;
  width: 44px;
  object-fit: cover;
  border-radius: 8px;
  display: block;
}
.attach-name {
  font-size: 13px;
  color: var(--ink-2);
  max-width: 220px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.attach-remove {
  width: 20px; height: 20px;
  border-radius: 50%;
  border: none;
  background: var(--bg-hover);
  color: var(--muted);
  font-size: 10px;
  cursor: pointer;
  flex: none;
  transition: all 0.13s ease;
}
.attach-remove:hover { background: var(--danger); color: #fff; }

.disclaimer {
  text-align: center;
  font-size: 11.5px;
  color: var(--muted);
  margin-top: 10px;
}

/* ============ 子页面（知识库 / 设置） ============ */
.page {
  flex: 1;
  overflow-y: auto;
  padding: 28px 24px 40px;
}
.page.narrow { max-width: 860px; margin: 0 auto; width: 100%; }
.page-title { font-size: 20px; font-weight: 700; }
.page-desc { color: var(--muted); font-size: 13.5px; margin: 4px 0 20px; }

.panel {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px 20px;
  margin-bottom: 18px;
  box-shadow: var(--shadow-sm);
}
.panel h3 { font-size: 15px; margin-bottom: 12px; }

.kb-upload-row { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
.kb-upload-row .text-input { width: 180px; }
.kb-upload-row .text-input.grow { flex: 1; width: auto; min-width: 200px; }
.kb-upload-row .text-input.short { width: 130px; }

.kb-list { display: flex; flex-direction: column; gap: 8px; }
.kb-doc {
  display: flex; align-items: center; gap: 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  font-size: 13.5px;
}
.kb-doc .doc-title { font-weight: 600; }
.kb-doc .doc-meta { color: var(--muted); font-size: 12px; }
.kb-doc .doc-del { margin-left: auto; }

.kb-results { margin-top: 12px; display: flex; flex-direction: column; gap: 8px; }
.kb-hit {
  border: 1px solid var(--line);
  border-left: 3px solid var(--brand);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  font-size: 13.5px;
  background: var(--bg-subtle);
}
.kb-hit .hit-title { font-weight: 650; }
.kb-hit .hit-score { color: var(--brand); font-size: 12px; margin-left: 6px; }
.kb-hit .hit-content { color: var(--ink-2); font-size: 13px; margin-top: 3px; }

.settings-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.setting-item {
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  background: #fff;
}
.setting-item .k { font-size: 12px; color: var(--muted); }
.setting-item .v { font-size: 15px; font-weight: 650; margin-top: 2px; word-break: break-all; }

/* ============ 图片预览遮罩 ============ */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(15, 15, 28, 0.78);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px;
  animation: lb-in 0.18s ease;
}
@keyframes lb-in { from { opacity: 0; } to { opacity: 1; } }
.lightbox img {
  max-width: 100%;
  max-height: calc(100vh - 120px);
  border-radius: 12px;
  box-shadow: var(--shadow-lg);
  animation: lb-img-in 0.22s ease;
}
@keyframes lb-img-in { from { transform: scale(0.94); opacity: 0; } to { transform: scale(1); opacity: 1; } }
.lb-close {
  position: absolute;
  top: 18px; right: 22px;
  width: 40px; height: 40px;
  border-radius: 50%;
  border: none;
  background: rgba(255, 255, 255, 0.14);
  color: #fff;
  font-size: 16px;
  cursor: pointer;
  transition: background 0.14s ease;
}
.lb-close:hover { background: rgba(255, 255, 255, 0.28); }
.lb-download {
  position: absolute;
  bottom: 24px; left: 50%;
  transform: translateX(-50%);
  background: var(--brand-grad);
  color: #fff;
  text-decoration: none;
  font-size: 13.5px;
  font-weight: 600;
  padding: 9px 22px;
  border-radius: 999px;
  box-shadow: var(--shadow-brand);
}
.lb-download:hover { filter: brightness(1.08); }

/* ============ 项目说明文档页 ============ */
.doc-page { max-width: 880px; }
.doc-body {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 26px 30px 22px;
  box-shadow: var(--shadow-sm);
  font-size: 13.5px;
  line-height: 1.85;
  color: var(--ink-2);
}
.doc-body h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
  margin: 22px 0 10px;
  padding-left: 10px;
  border-left: 3px solid var(--brand);
  line-height: 1.4;
}
.doc-body h3:first-child { margin-top: 0; }
.doc-body p { margin: 6px 0; }
.doc-body code {
  background: var(--brand-soft);
  color: var(--brand);
  border-radius: 5px;
  padding: 1px 6px;
  font-size: 12px;
  font-family: "Cascadia Code", Consolas, Monaco, monospace;
}
.doc-tag {
  display: inline-block;
  font-size: 11.5px;
  font-weight: 600;
  color: var(--brand);
  background: var(--brand-soft);
  border-radius: 5px;
  padding: 1px 7px;
  white-space: nowrap;
}
.doc-table {
  width: 100%;
  border-collapse: collapse;
  margin: 8px 0 4px;
  font-size: 12.8px;
}
.doc-table th {
  text-align: left;
  font-weight: 650;
  color: var(--ink);
  background: var(--bg-subtle);
  padding: 8px 12px;
  border-bottom: 2px solid var(--line);
  white-space: nowrap;
}
.doc-table td {
  padding: 8px 12px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
.doc-table tr:last-child td { border-bottom: none; }
.doc-table tbody tr:hover { background: var(--bg-hover); }
.doc-tree, .doc-code {
  background: #14141f;
  color: #d6d6e8;
  border-radius: 12px;
  padding: 16px 18px;
  font-family: "Cascadia Code", Consolas, Monaco, monospace;
  font-size: 12px;
  line-height: 1.75;
  overflow-x: auto;
  margin: 8px 0 4px;
  white-space: pre;
}
.doc-code .c-comment { color: #7c7c96; }
.doc-flow { margin: 8px 0 4px; padding-left: 20px; }
.doc-flow li { margin: 5px 0; }
.doc-flow li b { color: var(--ink); }
.doc-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 24px;
  padding-top: 14px;
  border-top: 1px dashed var(--line);
  color: var(--muted);
  font-size: 12.5px;
}
.doc-footer strong { color: var(--ink); }

/* ============ Toast ============ */
.toast {
  position: fixed;
  top: 18px; left: 50%;
  transform: translateX(-50%);
  background: var(--ink);
  color: #fff;
  font-size: 13.5px;
  padding: 9px 20px;
  border-radius: 999px;
  box-shadow: var(--shadow-lg);
  z-index: 100;
  animation: toast-in 0.2s ease;
}
@keyframes toast-in { from { opacity: 0; transform: translate(-50%, -8px); } to { opacity: 1; transform: translate(-50%, 0); } }

/* ============ 滚动条 ============ */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-thumb { background: #d8d8e6; border-radius: 999px; }
::-webkit-scrollbar-thumb:hover { background: #c2c2d6; }
::-webkit-scrollbar-track { background: transparent; }

/* ============ 响应式 ============ */
@media (max-width: 900px) {
  .sidebar {
    position: fixed;
    z-index: 50;
    height: 100vh;
    box-shadow: var(--shadow-lg);
  }
  .sidebar.hidden { margin-left: calc(var(--sidebar-w) * -1); box-shadow: none; }
  .settings-grid { grid-template-columns: 1fr; }
  .form-grid { grid-template-columns: 1fr; }
  .bubble { max-width: 92%; }
}
@media (max-width: 560px) {
  .kb-upload-row .text-input, .kb-upload-row .text-input.short { width: 100%; }
  .copy-tools .text-input { width: 100%; }
  .messages { gap: 14px; }
}

/* ============================================================
   可访问性：可见焦点环
   ============================================================ */
:focus-visible {
  outline: 2px solid var(--brand);
  outline-offset: 2px;
  border-radius: 8px;
}
.btn:focus-visible,
.chip:focus-visible,
.chip-btn:focus-visible,
.nav-item:focus-visible,
.round-btn:focus-visible,
.icon-btn:focus-visible,
.hist-item:focus-visible,
.link-btn:focus-visible,
.lb-close:focus-visible,
.attach-remove:focus-visible {
  outline: 2px solid var(--brand);
  outline-offset: 2px;
}
.field input:focus-visible,
.field select:focus-visible,
.field textarea:focus-visible,
.text-input:focus-visible,
.composer-input:focus-visible {
  outline: none; /* 已有 box-shadow / focus-within 高亮替代 */
}

/* ============================================================
   确认弹窗
   ============================================================ */
.modal {
  position: fixed;
  inset: 0;
  z-index: 300;
  background: rgba(15, 15, 28, 0.5);
  backdrop-filter: blur(3px);
  -webkit-backdrop-filter: blur(3px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  animation: lb-in 0.15s ease;
}
.modal-card {
  width: min(420px, 100%);
  background: #fff;
  border-radius: var(--radius);
  padding: 22px 24px 18px;
  box-shadow: var(--shadow-lg);
  animation: lb-img-in 0.18s ease;
}
.modal-title { font-size: 16px; font-weight: 700; }
.modal-body { margin-top: 10px; font-size: 14px; color: var(--ink-2); line-height: 1.7; }
.modal-actions { display: flex; justify-content: flex-end; gap: 10px; margin-top: 20px; }

.btn.primary.danger-solid {
  background: var(--danger);
  box-shadow: 0 4px 14px rgba(220, 38, 38, 0.32);
}

/* ============================================================
   广告策划主题展示
   ============================================================ */
.theme-line {
  margin: 10px 0 4px;
  padding: 9px 12px;
  border-radius: var(--radius-sm);
  background: var(--brand-soft);
  color: var(--ink);
  font-size: 13px;
}
.theme-line span { font-weight: 650; }

/* ============================================================
   动效降级：尊重系统「减少动态效果」
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
  .gallery-item:hover img { transform: none; }
  .gallery-item:active img { transform: none; }
  .btn.primary:hover { transform: none; }
  .round-btn.primary:hover { transform: none; }
  .btn:active,
  .btn.primary:active,
  .chip:active,
  .chip-btn:active,
  .nav-item:active,
  .icon-btn:active,
  .round-btn:active,
  .round-btn.primary:active,
  .side-collapse:active,
  .btn-new-chat:active,
  .link-btn:active,
  .hist-item:active,
  .hist-del:active { transform: none; }
}