/* ===== DeepImide CSS v3 ===== */
:root {
  /* 主题变量清单（引用 var(--xxx) 前必须确认有定义！2026-09-25 补）
     背景: --bg-primary --bg-secondary --bg-tertiary --bg-hover --bg-active
     文字: --text-primary --text-secondary --text-muted | 边框: --border --border-light
     圆角: --radius --radius-sm --radius-lg --radius-xl | 阴影: --shadow | 强调: --accent --accent-light */
  --bg-primary: #0a0a0f; --bg-secondary: #111118; --bg-tertiary: #1a1a24;
  --bg-hover: #22222e; --bg-active: #2a2a38;
  --text-primary: #e4e4e8; --text-secondary: #9898a4; --text-muted: #5a5a6a;
  --accent: #8b5cf6; --accent-hover: #7c3aed;
  --accent-light: rgba(139,92,246,0.1); --accent-light2: rgba(139,92,246,0.06);
  --border: rgba(255,255,255,0.06); --border-light: rgba(255,255,255,0.1);
  --success: #22c55e; --warning: #f59e0b; --error: #ef4444;
  --radius: 12px; --radius-sm: 8px; --radius-lg: 16px; --radius-xl: 24px;
  --sidebar-w: 280px; --max-w: 768px;
  --shadow: 0 8px 32px rgba(0,0,0,0.4); --transition: 0.2s ease;
  /* 主题相关补充变量 */
  --code-bg: #0c0c14;
  --modal-overlay-bg: rgba(0,0,0,0.6);
  --image-modal-bg: rgba(0,0,0,0.85);
  --drag-overlay-bg: rgba(10,10,15,0.85);
  --toast-bg: rgba(30,30,45,0.95);
  --toast-text: #e2e8f0;
  --toolbar-bg: rgba(20,20,30,0.75);
  --toolbar-text: rgba(255,255,255,0.65);
  --toolbar-hover-bg: rgba(139, 92, 246, 0.2);
  --toolbar-hover-text: #c4b5fd;
  --select-bg: rgba(255,255,255,0.06);
  --select-text: #e2e8f0;
  --select-option-bg: #1e293b;
  --select-option-text: #e2e8f0;
  --agent-label-color: rgba(255,255,255,0.5);
  --logo-glow-opacity: 1;
  --desc-text-shadow: 0 0 20px rgba(139, 92, 246, 0.3), 0 0 40px rgba(139, 92, 246, 0.15);
  --logo-src: url('图片2.png');
}

/* ===== 亮色主题 ===== */
[data-theme="light"] {
  --bg-primary: #f8f9fc; --bg-secondary: #ffffff; --bg-tertiary: #f1f3f8;
  --bg-hover: #e8ebf2; --bg-active: #dddfe8;
  --text-primary: #1e293b; --text-secondary: #64748b; --text-muted: #94a3b8;
  --accent: #7c3aed; --accent-hover: #6d28d9;
  --accent-light: rgba(124,58,237,0.08); --accent-light2: rgba(124,58,237,0.04);
  --border: rgba(0,0,0,0.08); --border-light: rgba(0,0,0,0.12);
  --shadow: 0 8px 32px rgba(0,0,0,0.08);
  --code-bg: #f1f5f9;
  --modal-overlay-bg: rgba(0,0,0,0.35);
  --image-modal-bg: rgba(0,0,0,0.7);
  --drag-overlay-bg: rgba(248,249,252,0.85);
  --toast-bg: rgba(30,41,59,0.92);
  --toast-text: #e2e8f0;
  --toolbar-bg: rgba(255,255,255,0.85);
  --toolbar-text: rgba(30,41,59,0.7);
  --toolbar-hover-bg: rgba(124,58,237,0.1);
  --toolbar-hover-text: #7c3aed;
  --select-bg: rgba(0,0,0,0.05);
  --select-text: #1e293b;
  --select-option-bg: #ffffff;
  --select-option-text: #1e293b;
  --agent-label-color: rgba(0,0,0,0.45);
  --logo-glow-opacity: 0;
  --desc-text-shadow: none;
  --logo-src: url('白天logo.png');
}

[data-theme="light"] .welcome-logo,
[data-theme="light"] .welcome-logo:hover {
  filter: none !important;
  animation: none !important;
}
[data-theme="light"] .welcome-card::before {
  background: radial-gradient(circle, rgba(139,92,246,0.04) 0%, rgba(139,92,246,0.015) 40%, transparent 70%);
}
/* ===== 亮色主题欢迎页流光 ===== */
[data-theme="light"] .welcome-screen {
  background:
    radial-gradient(ellipse at 20% 30%, rgba(139,92,246,0.05) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 70%, rgba(168,85,247,0.04) 0%, transparent 50%),
    radial-gradient(ellipse at 50% 50%, rgba(109,40,217,0.03) 0%, transparent 60%);
  background-size: 200% 200%;
  animation: welcomeBgFlowLight 10s ease-in-out infinite alternate;
}
@keyframes welcomeBgFlowLight {
  0% { background-position: 0% 0%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 0%; }
}

[data-theme="light"] .feature-card:hover {
  box-shadow: 0 0 20px rgba(139,92,246,0.12), 0 4px 16px rgba(139,92,246,0.08);
}
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html, body { height: 100%; font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Inter', sans-serif; background: var(--bg-primary); color: var(--text-primary); overflow: hidden; }
body { display: flex; }
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--bg-active); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* ===== 2026-09-28 011: 键盘 focus 可见性（WCAG 2.4.7）——只用 :focus-visible 不影响鼠标点击 ===== */
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 4px; }

/* ===== 侧边栏 ===== */
.sidebar { width: var(--sidebar-w); min-width: var(--sidebar-w); height: 100vh; background: var(--bg-secondary); border-right: 1px solid var(--border); display: flex; flex-direction: column; z-index: 100; transition: transform 0.25s ease; }
.sidebar-header { padding: 12px; }

/* ===== 侧边栏品牌区 ===== */
.sidebar-brand {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 12px 16px 8px;
}
.sidebar-logo {
  width: 100%;
  max-width: 160px;
  height: auto;
  object-fit: contain;
  filter: drop-shadow(0 0 8px rgba(139, 92, 246, 0.35));
}

/* 亮色主题下去掉发光 */
[data-theme="light"] .sidebar-logo {
  filter: none;
}
.new-chat-btn { width: 100%; padding: 10px 14px; border-radius: var(--radius-sm); border: 1px solid var(--border-light); background: transparent; color: var(--text-primary); cursor: pointer; font-size: 14px; display: flex; align-items: center; gap: 10px; transition: all var(--transition); }
.new-chat-btn:hover { background: var(--bg-hover); border-color: var(--accent); color: var(--accent); }

/* 搜索框 */
.search-box { padding: 0 12px 8px; position: relative; }
.search-input { width: 100%; padding: 8px 32px 8px 12px; border: 1px solid var(--border); border-radius: var(--radius); background: var(--bg-tertiary); color: var(--text-primary); font-size: 13px; outline: none; transition: border-color 0.2s; box-sizing: border-box; }
.search-input:focus { border-color: var(--accent); }
.search-input::placeholder { color: var(--text-muted); }
.search-clear { position: absolute; right: 20px; bottom: 10px; background: none; border: none; color: var(--text-muted); cursor: pointer; font-size: 14px; padding: 2px 6px; border-radius: 4px; }
.search-clear:hover { color: var(--text-primary); background: var(--bg-hover); }

.chat-list { flex: 1; overflow-y: auto; padding: 0 8px; }
.chat-item { padding: 10px 12px; border-radius: var(--radius-sm); cursor: pointer; margin-bottom: 2px; display: flex; align-items: center; transition: background var(--transition); position: relative; gap: 8px; }
.chat-item:hover { background: var(--bg-hover); }
.chat-item.active { background: var(--bg-active); }
.chat-item-content { flex: 1; min-width: 0; display: flex; flex-direction: column; gap: 3px; }
.chat-item-title { font-size: 13px; color: var(--text-primary); font-weight: 500; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.chat-item-preview { font-size: 11px; color: var(--text-muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.chat-item-delete { display: none; background: none; border: none; color: var(--text-muted); cursor: pointer; padding: 4px; border-radius: 4px; flex-shrink: 0; transition: all var(--transition); }
@media (hover: hover) {
  .chat-item:hover .chat-item-delete { display: flex; }
}
.chat-item-delete:hover { color: var(--error); background: rgba(239,68,68,0.12); }
.sidebar-footer { padding: 12px; border-top: 1px solid var(--border); }
.status-bar { display: flex; align-items: center; gap: 8px; font-size: 12px; color: var(--text-muted); margin-bottom: 10px; }
.status-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--text-muted); }
.status-dot.connected { background: var(--success); }
.status-dot.connecting { background: var(--warning); }
.status-dot.error { background: var(--error); }
.main-content { flex: 1; display: flex; flex-direction: column; min-width: 0; background: var(--bg-primary); position: relative; }

/* ===== 金属流光背景 ===== */
.welcome-screen {
  background:
    radial-gradient(ellipse at 20% 30%, rgba(139,92,246,0.1) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 70%, rgba(168,85,247,0.08) 0%, transparent 50%),
    radial-gradient(ellipse at 50% 50%, rgba(109,40,217,0.06) 0%, transparent 60%);
  background-size: 200% 200%;
  animation: welcomeBgFlow 10s ease-in-out infinite alternate;
}
@keyframes welcomeBgFlow {
  0% { background-position: 0% 0%; }
  25% { background-position: 100% 50%; }
  50% { background-position: 50% 100%; }
  75% { background-position: 0% 75%; }
  100% { background-position: 100% 0%; }
}

/* ===== 欢迎页 ===== */
.welcome-screen { flex: 1; display: flex; align-items: center; justify-content: center; padding: 24px; overflow-y: auto; }
.welcome-card { max-width: 720px; width: 100%; text-align: center; padding: 20px 0; position: relative; }
/* 整体背景辉光 */
.welcome-card::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(139,92,246,0.08) 0%, rgba(139,92,246,0.03) 40%, transparent 70%);
  pointer-events: none;
  z-index: 0;
  animation: bgGlow 6s ease-in-out infinite alternate;
}
@keyframes bgGlow {
  0% { opacity: 0.6; transform: translate(-50%, -50%) scale(0.95); }
  100% { opacity: 1; transform: translate(-50%, -50%) scale(1.05); }
}
.welcome-card > * { position: relative; z-index: 1; }


/* ===== Logo 样式 ===== */
.welcome-logo {
  max-width: 520px;
  width: 100%;
  height: auto;
  margin-bottom: 36px;
  border-radius: 14px;
  /* 强紫色多层发光 */
  filter: drop-shadow(0 0 12px rgba(139,92,246,0.6))
          drop-shadow(0 0 32px rgba(139,92,246,0.5))
          drop-shadow(0 0 64px rgba(139,92,246,0.35))
          drop-shadow(0 0 100px rgba(139,92,246,0.2));
  transition: filter 0.4s ease;
  animation: logoBreathe 3s ease-in-out infinite alternate;
  /* 亮色主题下发光由 --logo-glow-opacity 控制 */
}
.welcome-logo:hover {
  filter: drop-shadow(0 0 16px rgba(139,92,246,0.8))
          drop-shadow(0 0 40px rgba(139,92,246,0.6))
          drop-shadow(0 0 80px rgba(139,92,246,0.45))
          drop-shadow(0 0 120px rgba(139,92,246,0.3));
}
@keyframes logoBreathe {
  0% { filter: drop-shadow(0 0 10px rgba(139,92,246,0.5)) drop-shadow(0 0 28px rgba(139,92,246,0.4)) drop-shadow(0 0 56px rgba(139,92,246,0.25)) drop-shadow(0 0 88px rgba(139,92,246,0.15)); }
  100% { filter: drop-shadow(0 0 14px rgba(139,92,246,0.7)) drop-shadow(0 0 36px rgba(139,92,246,0.55)) drop-shadow(0 0 72px rgba(139,92,246,0.4)) drop-shadow(0 0 110px rgba(139,92,246,0.25)); }
}
.welcome-card h1 { font-size: 36px; font-weight: 800; margin-bottom: 8px; background: linear-gradient(135deg, var(--accent), #a78bfa); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.welcome-desc {
  color: var(--text-secondary);
  font-size: 16px;
  margin-bottom: 44px;
  line-height: 1.7;
  /* 紫色发光提升可读性 */
  text-shadow: 0 0 20px rgba(139, 92, 246, 0.3), 0 0 40px rgba(139, 92, 246, 0.15);
  animation: descGlow 4s ease-in-out infinite alternate;
}
@keyframes descGlow {
  0% { text-shadow: 0 0 16px rgba(139, 92, 246, 0.25), 0 0 32px rgba(139, 92, 246, 0.12); }
  100% { text-shadow: 0 0 24px rgba(139, 92, 246, 0.45), 0 0 48px rgba(139, 92, 246, 0.2); }
}

/* ===== 功能卡片 ===== */
.feature-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-bottom: 36px; }
.feature-card { padding: 24px 14px; border-radius: var(--radius); background: var(--bg-secondary); border: 1px solid var(--border); cursor: pointer; text-align: left; transition: all var(--transition); box-shadow: 0 0 12px rgba(139,92,246,0.06); }
.feature-card:hover { border-color: var(--accent); background: var(--accent-light); transform: translateY(-2px); box-shadow: 0 0 20px rgba(139,92,246,0.2), 0 4px 16px rgba(139,92,246,0.15); }
.feature-icon-wrap { width: 44px; height: 44px; border-radius: 11px; display: flex; align-items: center; justify-content: center; margin-bottom: 14px; color: #fff; box-shadow: 0 0 12px rgba(139,92,246,0.2); }
.feature-icon-wrap.literature { background: linear-gradient(135deg, #6366f1, #818cf8); }
.feature-icon-wrap.compute { background: linear-gradient(135deg, #f59e0b, #fbbf24); }
.feature-icon-wrap.analysis { background: linear-gradient(135deg, #22c55e, #4ade80); }
.feature-icon-wrap.molecular { background: linear-gradient(135deg, #ec4899, #f472b6); }
.feature-card h3 { font-size: 15px; font-weight: 600; margin-bottom: 5px; color: var(--text-primary); text-shadow: 0 0 8px rgba(139,92,246,0.15); }
.feature-card p { font-size: 13px; color: var(--text-secondary); margin-bottom: 8px; }
.feature-tag { display: inline-block; font-size: 11px; padding: 3px 9px; border-radius: 4px; background: var(--bg-tertiary); color: var(--text-muted); letter-spacing: 0.5px; }

/* ===== 首页搜索栏 ===== */
.input-bar { margin-bottom: 24px; }
.input-bar-container { max-width: 600px; margin: 0 auto; background: var(--bg-secondary); border-radius: var(--radius-lg); border: 1px solid var(--border); padding: 4px 4px 4px 16px; display: flex; align-items: center; gap: 10px; transition: border-color var(--transition); box-shadow: 0 0 20px rgba(139,92,246,0.08); }
.input-bar-container:focus-within { border-color: var(--accent); box-shadow: 0 0 28px rgba(139,92,246,0.2); }
.input-bar-container:focus-within { border-color: var(--accent); }
.input-bar-icon { color: var(--text-muted); flex-shrink: 0; }
.input-bar-text { flex: 1; background: none; border: none; outline: none; color: var(--text-primary); font-size: 16px; padding: 11px 0; font-family: inherit; }
/* 2026-09-29: welcomeInput 从 <input> 改为 <textarea>，多行 prompt 需要 autoResize 撑高（全局 textarea 默认 max-height 200px 太矮，这里放宽到 360px） */
.input-bar-textarea { resize: none; line-height: 1.5; max-height: 360px; height: auto; }
.input-bar-text::placeholder { color: var(--text-muted); }
.input-bar-btn { background: var(--accent); border: none; border-radius: 12px; width: 36px; height: 36px; display: flex; align-items: center; justify-content: center; cursor: pointer; color: #fff; flex-shrink: 0; transition: all var(--transition); }
.input-bar-btn:hover { background: var(--accent-hover); }

/* ===== 欢迎页建议 ===== */
.welcome-suggestions { display: flex; flex-wrap: nowrap; gap: 10px; justify-content: center; }
.suggestion { flex: 1; min-width: 0; text-align: center; padding: 12px 16px; border-radius: 20px; background: var(--bg-secondary); border: 1px solid var(--border); font-size: 13px; color: var(--text-secondary); cursor: pointer; transition: all var(--transition); box-shadow: 0 0 8px rgba(139,92,246,0.04); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.suggestion:hover { background: var(--accent-light); color: var(--accent); border-color: var(--accent); box-shadow: 0 0 16px rgba(139,92,246,0.15); }
/* 2026-09-22 v1.3.0: 任务模板卡片 */
#templateGrid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; max-width: 720px; }
.template-card { position: relative; display: flex; flex-direction: column; gap: 6px; padding: 14px 16px; border-radius: 14px; background: var(--bg-secondary); border: 1px solid var(--border); cursor: pointer; transition: all var(--transition); text-align: left; }
.template-card:hover { border-color: var(--accent); box-shadow: 0 0 16px rgba(139,92,246,0.15); transform: translateY(-2px); }
.template-card .tc-icon { font-size: 22px; line-height: 1; }
.template-card .tc-title { font-size: 14px; font-weight: 600; color: var(--text-primary); }
.template-card .tc-desc { font-size: 12px; color: var(--text-secondary); line-height: 1.4; }
.template-card .tc-file { font-size: 11px; color: var(--accent); margin-top: auto; }

/* ===== 功能弹窗 ===== */
.modal-overlay { position: fixed; inset: 0; z-index: 1000; background: var(--modal-overlay-bg); backdrop-filter: blur(4px); display: flex; align-items: center; justify-content: center; opacity: 0; pointer-events: none; transition: opacity 0.25s ease; }
.modal-overlay.active { opacity: 1; pointer-events: auto; }
.modal-box { width: 90%; max-width: 560px; max-height: 80vh; background: var(--bg-secondary); border-radius: var(--radius-lg); border: 1px solid var(--border); box-shadow: var(--shadow); display: flex; flex-direction: column; overflow: hidden; transform: scale(0.95); transition: transform 0.25s ease; }
.modal-overlay.active .modal-box { transform: scale(1); }
.modal-header { display: flex; align-items: center; justify-content: space-between; padding: 16px 20px; border-bottom: 1px solid var(--border); }
.modal-header h2 { font-size: 16px; font-weight: 700; }
.modal-close { background: none; border: none; color: var(--text-muted); cursor: pointer; padding: 4px; border-radius: 4px; transition: all var(--transition); }
@media (hover: hover) {
  .modal-close:hover { color: var(--text-primary); background: var(--bg-hover); }
}
.modal-body { flex: 1; overflow-y: auto; padding: 20px; font-size: 14px; line-height: 1.7; color: var(--text-secondary); }
.modal-body h4 { color: var(--text-primary); font-size: 14px; margin: 16px 0 8px; }
.modal-body h4:first-child { margin-top: 0; }
.modal-body p { margin-bottom: 8px; }
.modal-body ul { padding-left: 20px; margin-bottom: 8px; }
.modal-body li { margin-bottom: 4px; }
.modal-body strong { color: var(--text-primary); }
.modal-footer { display: flex; justify-content: flex-end; gap: 8px; padding: 14px 20px; border-top: 1px solid var(--border); }
.modal-btn-secondary { padding: 8px 16px; border-radius: var(--radius-sm); border: 1px solid var(--border); background: transparent; color: var(--text-secondary); cursor: pointer; font-size: 13px; transition: all var(--transition); }
.modal-btn-secondary:hover { background: var(--bg-hover); }
.modal-btn-primary { padding: 8px 20px; border-radius: var(--radius-sm); border: none; background: var(--accent); color: #fff; cursor: pointer; font-size: 13px; font-weight: 600; transition: all var(--transition); }
.modal-btn-primary:hover { background: var(--accent-hover); }

/* ===== 消息区 ===== */
.messages { flex: 1; overflow-y: auto; padding: 0; display: flex; flex-direction: column; }
.message { padding: 20px 24px; max-width: var(--max-w); margin: 0 auto; width: 100%; animation: msgIn 0.3s ease; display: flex; }
@keyframes msgIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }
.message.user { border-bottom: 1px solid transparent; }
.message.assistant { border-bottom: 1px solid var(--border); }
.message-avatar-wrap { width: 30px; height: 30px; border-radius: 8px; display: flex; align-items: center; justify-content: center; font-size: 14px; flex-shrink: 0; margin-right: 12px; }
.message-avatar-wrap.user { background: var(--accent); }
.message-avatar-wrap.assistant { background: var(--bg-tertiary); border: 1px solid var(--border); }
.message-content { flex: 1; min-width: 0; }
.message-header { display: flex; align-items: center; gap: 8px; margin-bottom: 6px; }
.message-sender { font-size: 13px; font-weight: 600; color: var(--text-secondary); }
.copy-message-btn { margin-left: auto; background: none; border: none; color: var(--text-muted); cursor: pointer; font-size: 13px; padding: 2px 6px; border-radius: 4px; opacity: 0; transition: all var(--transition); }
.message:hover .copy-message-btn { opacity: 1; }
.copy-message-btn:hover { background: var(--bg-hover); color: var(--text-primary); }
.message-body { font-size: 14.5px; line-height: 1.75; color: var(--text-primary); word-wrap: break-word; overflow-wrap: break-word; }
.message-body p { margin-bottom: 10px; }
.message-body p:last-child { margin-bottom: 0; }
.message-body h1, .message-body h2, .message-body h3, .message-body h4 { margin: 18px 0 8px; font-weight: 600; line-height: 1.35; color: var(--text-primary); }
.message-body h1 { font-size: 1.45em; } .message-body h2 { font-size: 1.25em; } .message-body h3 { font-size: 1.1em; } .message-body h4 { font-size: 1em; }
.message-body h1:first-child, .message-body h2:first-child, .message-body h3:first-child, .message-body h4:first-child { margin-top: 0; }
.message-body ul, .message-body ol { margin: 8px 0; padding-left: 24px; }
.message-body li { margin-bottom: 4px; }
.message-body li > ul, .message-body li > ol { margin: 4px 0; }
.message-body blockquote { border-left: 3px solid var(--accent); padding: 8px 16px; margin: 10px 0; background: var(--accent-light2); border-radius: 0 var(--radius-sm) var(--radius-sm) 0; color: var(--text-secondary); }
.message-body a { color: var(--accent); text-decoration: none; }
.message-body a:hover { text-decoration: underline; }
.message-body hr { border: none; border-top: 1px solid var(--border); margin: 16px 0; }
.message-body img { max-width: 100%; border-radius: var(--radius-sm); margin: 8px 0; }

/* 消息内联图片 */
.message-images { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 8px; }
.message-image { max-width: 240px; max-height: 240px; border-radius: var(--radius-sm); cursor: pointer; border: 1px solid var(--border); object-fit: cover; transition: transform 0.2s, box-shadow 0.2s; }
.message-image:hover { transform: scale(1.03); box-shadow: 0 4px 16px rgba(139,92,246,0.3); }

/* 文件附件卡片 */
.message-files { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 8px; }
.file-attachment-card {
  display: flex; align-items: center; gap: 8px;
  padding: 8px 12px; border-radius: 8px;
  background: var(--bg-hover, #f0f7ff);
  border: 1px solid var(--border, #e0ecff);
  cursor: pointer; transition: all 0.2s;
  font-size: 13px;
}
.file-attachment-card:hover {
  background: var(--accent-light, #e0ecff);
  border-color: var(--accent, #8b5cf6);
  box-shadow: 0 2px 8px rgba(139,92,246,0.15);
  transform: translateY(-1px);
}
.file-icon { font-size: 18px; }
.file-name { color: var(--text-primary, #333); font-weight: 500; max-width: 150px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.file-size { color: var(--text-muted, #999); font-size: 11px; }
.file-download { color: var(--accent, #8b5cf6); font-size: 14px; }

/* 图片灯箱 */
.image-modal { display: none; position: fixed; inset: 0; z-index: 9999; background: var(--image-modal-bg); align-items: center; justify-content: center; cursor: zoom-out; }
.image-modal.active { display: flex; }
.image-modal img { max-width: 90vw; max-height: 90vh; border-radius: var(--radius); box-shadow: var(--shadow); object-fit: contain; }
.image-modal-overlay { position: absolute; inset: 0; z-index: 1; }
.image-modal img { position: relative; z-index: 2; }

/* 消息操作栏（hover 显示） */
.message-actions {
  display: flex;
  gap: 4px;
  margin-top: 8px;
  opacity: 0;
  transition: opacity 0.2s ease;
}
.message:hover .message-actions {
  opacity: 1;
}
.msg-action-btn {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-muted);
  cursor: pointer;
  font-size: 11px;
  padding: 3px 8px;
  border-radius: 6px;
  transition: all var(--transition);
  display: flex;
  align-items: center;
  gap: 3px;
}
.msg-action-btn:hover {
  background: var(--accent-light);
  color: var(--accent);
  border-color: var(--accent);
}

/* 代码块 */
.code-block-wrapper { margin: 10px 0; border-radius: var(--radius-sm); overflow: hidden; border: 1px solid var(--border); }
.code-header { display: flex; justify-content: space-between; align-items: center; padding: 6px 12px; background: var(--bg-tertiary); font-size: 11px; color: var(--text-muted); border-bottom: 1px solid var(--border); }
.code-lang { text-transform: uppercase; font-weight: 600; letter-spacing: 0.5px; }
.copy-btn { background: none; border: 1px solid var(--border); color: var(--text-muted); cursor: pointer; font-size: 11px; padding: 2px 8px; border-radius: 4px; transition: all var(--transition); }
.copy-btn:hover { background: var(--bg-hover); color: var(--text-secondary); }
.code-block-wrapper pre { margin: 0 !important; padding: 14px !important; background: var(--code-bg) !important; border: none !important; overflow-x: auto; font-size: 13px; }
.code-block-wrapper code { background: none !important; padding: 0 !important; font-family: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', 'Consolas', monospace !important; font-size: 13px !important; }
.message-body code:not(pre code) { background: var(--bg-tertiary); padding: 2px 7px; border-radius: 5px; font-size: 13px; font-family: 'JetBrains Mono', 'Fira Code', monospace; color: #a78bfa; }
.message-body table { border-collapse: collapse; margin: 10px 0; font-size: 13px; width: 100%; max-width: 100%; display: block; overflow-x: auto; }
.message-body th, .message-body td { border: 1px solid var(--border); padding: 8px 12px; text-align: left; }
.message-body th { background: var(--bg-secondary); font-weight: 600; color: var(--text-primary); }
.message-body tr:nth-child(even) { background: rgba(255,255,255,0.015); }
.assistant .message-body { color: var(--text-secondary); }
.typing-cursor::after { content: '▊'; animation: blink 1s step-end infinite; color: var(--accent); }
@keyframes blink { 50% { opacity: 0; } }

/* ===== 输入区 ===== */
.input-area { padding: 0 16px 20px; flex-shrink: 0; }
.input-container { max-width: var(--max-w); margin: 0 auto; background: var(--bg-secondary); border-radius: var(--radius-lg); border: 1px solid var(--border); padding: 8px 12px; transition: border-color var(--transition); }
.input-container:focus-within { border-color: var(--accent); }
.input-wrapper { display: flex; align-items: flex-end; gap: 4px; }
textarea { flex: 1; background: none; border: none; outline: none; color: var(--text-primary); font-size: 14.5px; resize: none; max-height: 200px; padding: 8px 4px; font-family: inherit; line-height: 1.5; }
textarea::placeholder { color: var(--text-muted); }
.input-actions { display: flex; gap: 4px; align-items: flex-end; padding-bottom: 4px; }
.tool-btn { background: none; border: none; color: var(--text-muted); cursor: pointer; padding: 6px; border-radius: 6px; transition: all var(--transition); display: flex; align-items: center; }
@media (hover: hover) {
  .tool-btn:hover { background: var(--bg-hover); color: var(--text-secondary); }
}
.send-btn { background: var(--accent); border: none; border-radius: 8px; width: 34px; height: 34px; display: flex; align-items: center; justify-content: center; cursor: pointer; color: #fff; flex-shrink: 0; transition: all var(--transition); }
.send-btn:hover:not(:disabled) { background: var(--accent-hover); transform: scale(1.05); }
.send-btn:disabled { opacity: 0.25; cursor: not-allowed; }
.send-btn.sending { background: var(--warning); }
.send-btn.sending svg { animation: spin 1s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
.upload-preview { display: flex; gap: 8px; padding-top: 8px; flex-wrap: wrap; }
.upload-chip { display: flex; align-items: center; gap: 4px; padding: 4px 10px; border-radius: 6px; background: var(--bg-hover); font-size: 12px; color: var(--text-secondary); }
.upload-chip .remove { cursor: pointer; color: var(--text-muted); }
.input-footer { text-align: center; font-size: 11px; color: var(--text-muted); margin-top: 8px; }

/* ===== 响应式 ===== */
@media (max-width: 768px) {
  .sidebar { position: fixed; left: 0; top: 0; bottom: 0; transform: translateX(-100%); box-shadow: var(--shadow); }
  .sidebar.open { transform: translateX(0); }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .message { padding: 16px; }
  .input-area { padding: 0 12px 12px; }
  .welcome-card h1 { font-size: 28px; }
  .welcome-logo { max-width: 380px; }
  .copy-message-btn { opacity: 1; }
}
@media (max-width: 480px) {
  .feature-grid { grid-template-columns: 1fr 1fr; gap: 8px; }
  .feature-card { padding: 14px 10px; }
  .welcome-suggestions { flex-direction: column; }
  .suggestion { text-align: center; }
  #templateGrid { grid-template-columns: 1fr 1fr; }
  .input-bar-container { padding: 4px 4px 4px 12px; }
}

/* ===== 拖拽上传 ===== */
.drag-overlay {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 9998;
  background: var(--drag-overlay-bg);
  backdrop-filter: blur(6px);
  pointer-events: none;
}
.drag-overlay.active {
  display: flex;
  align-items: center;
  justify-content: center;
}
.drag-overlay-content {
  text-align: center;
  padding: 60px 80px;
  border: 3px dashed var(--accent);
  border-radius: var(--radius-xl);
  background: rgba(139, 92, 246, 0.06);
  box-shadow: 0 0 60px rgba(139, 92, 246, 0.2);
  animation: dragPulse 1.5s ease-in-out infinite alternate;
}
@keyframes dragPulse {
  0% { box-shadow: 0 0 40px rgba(139, 92, 246, 0.15); }
  100% { box-shadow: 0 0 80px rgba(139, 92, 246, 0.3); }
}
.drag-overlay-icon {
  font-size: 56px;
  margin-bottom: 16px;
  animation: dragBounce 0.8s ease-in-out infinite alternate;
}
@keyframes dragBounce {
  0% { transform: translateY(0); }
  100% { transform: translateY(-8px); }
}
.drag-overlay-title {
  font-size: 22px;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 8px;
}
.drag-overlay-desc {
  font-size: 14px;
  color: var(--text-secondary);
}

/* 输入区拖拽高亮 */
.input-container.drag-hover {
  border-color: var(--accent);
  box-shadow: 0 0 20px rgba(139, 92, 246, 0.25);
  background: var(--accent-light);
}

/* 欢迎页输入栏拖拽高亮 */
.input-bar-container.drag-hover {
  border-color: var(--accent);
  box-shadow: 0 0 28px rgba(139, 92, 246, 0.3);
}

/* ===== 文件下载链接 ===== */
.file-download-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  margin: 4px 2px;
  background: var(--accent-light, #f0f7ff);
  border: 1px solid var(--accent, #1677ff);
  border-radius: 6px;
  color: var(--accent, #1677ff);
  text-decoration: none;
  font-size: 13px;
  font-weight: 500;
  transition: all 0.2s;
  cursor: pointer;
}
.file-download-link:hover {
  background: var(--accent, #1677ff);
  color: white;
  transform: translateY(-1px);
  box-shadow: 0 2px 8px rgba(22, 119, 255, 0.3);
}
.message-body .message-image {
  max-width: 300px;
  max-height: 300px;
  border-radius: 8px;
  margin: 8px 0;
  cursor: pointer;
  border: 1px solid #eee;
}

/* ===== 主页文件上传 ===== */
.hidden-file-input {
  display: none;
}
.input-bar-attach {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  padding: 4px;
  margin-right: 2px;
  color: var(--text-secondary, #999);
  background: none;   /* button 元素默认有灰底，统一去除 */
  border: none;       /* button 元素默认有边框，统一去除 */
  transition: color 0.2s;
}
.input-bar-attach:hover {
  color: var(--accent, #1677ff);
}
/* 2026-09-22 v1.3.3: 需文件模板的上传气泡提示 */
.upload-tip {
  position: fixed;
  z-index: 10000;
  background: rgba(30,27,45,0.95);
  color: #fff;
  font-size: 12px;
  line-height: 1;
  padding: 8px 12px;
  border-radius: 8px;
  box-shadow: 0 4px 16px rgba(0,0,0,0.25);
  pointer-events: none;
  white-space: nowrap;
  animation: uploadTipIn 0.18s ease;
}
.upload-tip::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 50%;
  transform: translateX(-50%);
  border-left: 6px solid transparent;
  border-right: 6px solid transparent;
  border-top: 6px solid rgba(30,27,45,0.95);
}
@keyframes uploadTipIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}
#welcomeUploadPreview {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: 0 16px 8px;
  max-width: 680px;
  margin: 0 auto;
}
.upload-chip {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  background: var(--accent-light, #f0f7ff);
  border: 1px solid var(--accent-light2, #e0ecff);
  border-radius: 12px;
  font-size: 12px;
  color: var(--text-secondary, #666);
}

/* ===== Agent 切换器 ===== */
.agent-switcher {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  margin-bottom: 4px;
  border-radius: 8px;
  background: rgba(255,255,255,0.03);
  transition: background 0.3s;
}
.agent-switcher.switching {
  background: rgba(52, 211, 153, 0.1);
}
.agent-label {
  font-size: 12px;
  color: var(--agent-label-color);
  white-space: nowrap;
  user-select: none;
}
.agent-select {
  flex: 1;
  padding: 4px 8px;
  border: 1px solid var(--border-light);
  border-radius: 6px;
  background: var(--select-bg);
  color: var(--select-text);
  font-size: 12px;
  cursor: pointer;
  outline: none;
  transition: border-color 0.2s, background 0.2s;
  -webkit-appearance: none;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg width='10' height='6' viewBox='0 0 10 6' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1L5 5L9 1' stroke='%2394a3b8' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 8px center;
  padding-right: 24px;
}
.agent-select:hover {
  border-color: rgba(255,255,255,0.25);
  background-color: rgba(255,255,255,0.1);
}
.agent-select:focus {
  border-color: #34d399;
  background-color: rgba(52, 211, 153, 0.08);
}
.agent-select option {
  background: var(--select-option-bg);
  color: var(--select-option-text);
  padding: 8px;
}

.sidebar-action-btn:hover {
  background: rgba(52, 211, 153, 0.15);
  border-color: rgba(52, 211, 153, 0.3);
  color: #34d399;
}

/* ===== 图片灯箱增强 ===== */
.image-modal {
  cursor: default;
}
.image-modal img {
  cursor: pointer;
}

/* 工具栏 */
.image-modal-toolbar {
  position: absolute;
  top: 20px;
  right: 20px;
  z-index: 10001;
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--toolbar-bg);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-light);
  border-radius: 10px;
  padding: 5px 6px;
  opacity: 0;
  transform: translateY(-6px);
  transition: opacity 0.25s ease, transform 0.25s ease;
}
.image-modal:hover .image-modal-toolbar {
  opacity: 1;
  transform: translateY(0);
}
.image-modal-btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 6px 12px;
  border: none;
  border-radius: 7px;
  background: transparent;
  color: var(--toolbar-text);
  font-size: 12.5px;
  cursor: pointer;
  transition: all 0.2s;
  white-space: nowrap;
}
.image-modal-btn:hover {
  background: var(--toolbar-hover-bg);
  color: var(--toolbar-hover-text);
}
.image-modal-close {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 6px;
  border: none;
  border-radius: 7px;
  background: transparent;
  color: rgba(255,255,255,0.5);
  cursor: pointer;
  transition: all 0.2s;
}
.image-modal-close:hover {
  background: rgba(239, 68, 68, 0.2);
  color: #fca5a5;
}

/* ===== Toast 提示 ===== */
.toast-container {
  position: fixed;
  top: 24px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 99999;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  pointer-events: none;
}
.toast-message {
  padding: 10px 24px;
  background: var(--toast-bg);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(139, 92, 246, 0.3);
  border-radius: 10px;
  color: var(--toast-text);
  font-size: 13.5px;
  box-shadow: var(--shadow);
  opacity: 0;
  transform: translateY(-10px);
  transition: opacity 0.3s ease, transform 0.3s ease;
  pointer-events: auto;
}
.toast-message.toast-show {
  opacity: 1;
  transform: translateY(0);
}

/* ===== 移动端侧边栏遮罩 ===== */
.sidebar-mask {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 99;
  background: rgba(0, 0, 0, 0.5);
}

@media (max-width: 768px) {
  .sidebar-mask.show {
    display: block;
  }
}

/* ===== 主题切换按钮 ===== */
#themeToggleBtn {
  position: relative;
}

/* 亮色主题下按钮图标样式 */
[data-theme="light"] #themeToggleBtn svg {
  transform: rotate(180deg);
  transition: transform 0.3s ease;
}

/* ==================================================================
   手机端适配 CSS (≤768px)
   ================================================================== */

/* 移动端顶部导航栏（默认隐藏） */
.mobile-header {
  display: none;
}

.mobile-menu-btn {
  background: none;
  border: none;
  color: var(--text-primary);
  cursor: pointer;
  padding: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.mobile-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
}

@media (max-width: 768px) {
  /* 移动端顶部导航栏 */
  .mobile-header {
    display: flex;
    align-items: center;
    gap: 12px;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 48px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    z-index: 99;
    padding: 0 12px;
  }

  /* 侧边栏默认隐藏 */
  .sidebar {
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    transform: translateX(-100%);
    z-index: 101;
    box-shadow: var(--shadow);
  }

  .sidebar.open {
    transform: translateX(0);
  }

  /* 遮罩层 */
  .sidebar-mask {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 100;
    background: rgba(0, 0, 0, 0.5);
  }

  .sidebar-mask.show {
    display: block;
  }

  /* 主内容区留出导航栏空间 */
  .main-content {
    padding-top: 48px;
  }

  /* 欢迎页调整 */
  .welcome-screen {
    padding: 16px;
  }

  .welcome-logo {
    max-width: 240px;
  }

  .welcome-card h1 {
    font-size: 24px;
  }

  .welcome-desc {
    font-size: 14px;
    margin-bottom: 24px;
  }

  /* 功能卡片 2 列 */
  .feature-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
    margin-bottom: 24px;
  }

  .feature-card {
    padding: 16px 12px;
  }

  .feature-icon-wrap {
    width: 36px;
    height: 36px;
  }

  .feature-card h3 {
    font-size: 13px;
  }

  .feature-card p {
    font-size: 12px;
  }

  /* 建议按钮纵向排列 */
  .welcome-suggestions {
    flex-direction: column;
    gap: 8px;
  }

  .suggestion {
    text-align: center;
    padding: 10px 12px;
    font-size: 12px;
    white-space: normal;
  }

  /* 首页搜索栏 */
  .input-bar {
    margin-bottom: 16px;
  }

  /* 消息区 */
  .message {
    padding: 12px;
  }

  .message-body {
    font-size: 14px;
  }

  /* 输入区 */
  .input-area {
    padding: 0 8px 12px;
  }

  /* 操作按钮始终可见 */
  .copy-message-btn {
    opacity: 1;
  }

  .message-actions {
    opacity: 1;
  }

  /* 代码块和表格横向滚动 */
  .message-body table {
    display: block;
    overflow-x: auto;
  }

  .code-block-wrapper {
    overflow-x: auto;
  }

  /* 弹窗全宽显示 */
  .modal-box {
    width: 95%;
    max-width: 95%;
  }

  /* 图片灯箱工具栏居中 */
  .image-modal-toolbar {
    top: 56px;
    right: 50%;
    transform: translateX(50%) translateY(-6px);
  }

  .image-modal:hover .image-modal-toolbar {
    transform: translateX(50%) translateY(0);
  }

  /* Toast 向下偏移 */
  .toast-container {
    top: 56px;
  }

  /* 拖拽上传遮罩 */
  .drag-overlay-content {
    padding: 40px;
  }

  .drag-overlay-icon {
    font-size: 40px;
  }

  .drag-overlay-title {
    font-size: 18px;
  }

  /* 主页上传预览 */
  #welcomeUploadPreview {
    padding: 0 8px 8px;
  }

  /* 手机端：侧边栏高度用动态视口（手机浏览器地址栏收起/展开都能贴对），底部按钮上移避开工具栏 */
  .sidebar {
    height: 100dvh;
  }
  .sidebar-footer {
    padding: 10px 12px calc(14px + env(safe-area-inset-bottom, 0px));
  }
  .sidebar-footer .status-bar {
    display: none;
  }
  .login-sidebar-btn {
    margin-bottom: 4px;
    padding: 11px 14px;
  }
}

/* 超小屏幕进一步缩小 */
@media (max-width: 480px) {
  .feature-grid {
    grid-template-columns: 1fr 1fr;
    gap: 6px;
  }

  .feature-card {
    padding: 12px 8px;
  }

  .feature-icon-wrap {
    width: 32px;
    height: 32px;
    margin-bottom: 8px;
  }

  .feature-card h3 {
    font-size: 12px;
  }

  .feature-card p {
    font-size: 11px;
  }

  .feature-tag {
    font-size: 10px;
    padding: 2px 6px;
  }

  .welcome-logo {
    max-width: 200px;
  }

  .welcome-card h1 {
    font-size: 20px;
  }

  .welcome-desc {
    font-size: 13px;
  }

  .input-bar-container {
    padding: 4px 4px 4px 10px;
  }

  .input-bar-text {
    font-size: 14px;
  }

  .message {
    padding: 10px;
  }
}

/* ===== 登录页面 ===== */

.login-page {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  align-items: center;
  justify-content: center;
  z-index: 10000;
  background: var(--modal-overlay-bg);
  backdrop-filter: blur(8px);
  overflow: hidden;
}

.login-bg-gradient {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: 
    radial-gradient(ellipse at 20% 50%, rgba(139, 92, 246, 0.1) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 50%, rgba(59, 130, 246, 0.08) 0%, transparent 50%),
    radial-gradient(ellipse at 50% 100%, rgba(139, 92, 246, 0.06) 0%, transparent 40%);
  pointer-events: none;
}

.login-bg-particles {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  overflow: hidden;
}

.login-bg-particles .particle {
  position: absolute;
  border-radius: 50%;
  background: rgba(139, 92, 246, 0.15);
  animation: particleFloat linear infinite;
}

@keyframes particleFloat {
  0% { transform: translateY(100vh) scale(0); opacity: 0; }
  10% { opacity: 1; }
  90% { opacity: 1; }
  100% { transform: translateY(-10vh) scale(1); opacity: 0; }
}

.login-card {
  position: relative;
  width: 100%;
  max-width: 440px;
  max-height: calc(100vh - 32px);
  overflow-y: auto;
  overflow-x: hidden;
  padding: 24px 32px 16px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.5), 0 0 120px rgba(139, 92, 246, 0.08);
  animation: loginFadeIn 0.4s ease;
  transition: transform 0.3s ease;
}

.login-card:hover {
  transform: translateY(-2px);
}

/* 细滚动条（登录卡高度受限时） */
.login-card::-webkit-scrollbar {
  width: 6px;
}
.login-card::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 3px;
}
.login-card::-webkit-scrollbar-track {
  background: transparent;
}

/* 关闭按钮 */
.login-close-btn {
  position: absolute;
  top: 12px;
  right: 12px;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  border-radius: 6px;
  transition: all 0.2s;
  z-index: 10;
  padding: 0;
}

.login-close-btn:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

@keyframes loginFadeIn {
  from {
    opacity: 0;
    transform: translateY(20px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.login-header {
  text-align: center;
  margin-bottom: 14px;
}

.login-logo {
  max-width: 140px;
  width: auto;
  height: auto;
  margin-bottom: 8px;
  filter: drop-shadow(0 0 20px rgba(139, 92, 246, 0.3));
  transition: filter 0.3s;
}

.login-card:hover .login-logo {
  filter: drop-shadow(0 0 28px rgba(139, 92, 246, 0.45));
}

.login-subtitle {
  font-size: 13px;
  color: var(--text-secondary);
  margin: 0;
  letter-spacing: 0.5px;
}

/* ===== Auth 标签切换 ===== */
.auth-tabs {
  display: flex;
  position: relative;
  margin-bottom: 14px;
  background: var(--bg-tertiary);
  border-radius: var(--radius-sm);
  padding: 4px;
}

.auth-tab {
  flex: 1;
  padding: 7px 0;
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  border-radius: calc(var(--radius-sm) - 2px);
  transition: color 0.25s;
  position: relative;
  z-index: 1;
}

.auth-tab.active {
  color: var(--text-primary);
}

.auth-tab-indicator {
  position: absolute;
  top: 4px;
  left: 4px;
  width: calc(50% - 4px);
  height: calc(100% - 8px);
  background: var(--bg-secondary);
  border-radius: calc(var(--radius-sm) - 2px);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

#tabRegister.active ~ .auth-tab-indicator {
  transform: translateX(100%);
}

/* Auth 表单通用 */
.auth-form {
  display: none;
  flex-direction: column;
  gap: 10px;
  animation: authFormIn 0.3s ease;
}

@keyframes authFormIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.form-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 6px;
}

.form-label svg {
  flex-shrink: 0;
  opacity: 0.6;
}

.form-input {
  width: 100%;
  padding: 8px 14px;
  background: var(--bg-tertiary);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 14px;
  outline: none;
  transition: all 0.25s;
  box-sizing: border-box;
}

.form-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.12);
  background: var(--bg-secondary);
}

.form-input::placeholder {
  color: var(--text-muted);
}

.password-input-wrap {
  position: relative;
}

.password-input {
  padding-right: 48px !important;
}

.password-toggle {
  position: absolute;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  border-radius: 4px;
  transition: color 0.2s;
}

.password-toggle:hover {
  color: var(--text-secondary);
}

.password-toggle .eye-closed {
  display: none;
}

.password-toggle.active .eye-open {
  display: none;
}

/* 2026-09-26: 邮箱验证码按钮 */
.send-verify-btn {
  flex-shrink: 0;
  padding: 0 12px;
  height: 100%;
  min-height: 36px;
  background: rgba(59, 130, 246, 0.12);
  border: 1px solid rgba(59, 130, 246, 0.35);
  color: var(--accent, #3b82f6);
  border-radius: 6px;
  font-size: 13px;
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.2s;
}

.send-verify-btn:hover:not(:disabled) {
  background: rgba(59, 130, 246, 0.22);
}

.send-verify-btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.password-toggle.active .eye-closed {
  display: block;
}

.form-options {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--text-secondary);
  cursor: pointer;
  user-select: none;
}

.checkbox-label input[type="checkbox"] {
  accent-color: var(--accent);
  width: 14px;
  height: 14px;
}

.forgot-link {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.2s;
}

.forgot-link:hover {
  color: var(--accent-hover);
  text-decoration: underline;
}

.auth-error {
  font-size: 13px;
  color: var(--error);
  text-align: center;
  min-height: 18px;
  padding: 0;
  transition: opacity 0.2s;
}

.auth-success {
  font-size: 13px;
  color: #22c55e;
  text-align: center;
  min-height: 18px;
  padding: 0;
  transition: opacity 0.2s;
}

.auth-btn {
  width: 100%;
  padding: 10px 24px;
  background: linear-gradient(135deg, var(--accent), #7c3aed);
  color: white;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.25s;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  position: relative;
  overflow: hidden;
}

.auth-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(139, 92, 246, 0.35);
}

.auth-btn:active {
  transform: translateY(0);
}

.auth-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.auth-btn-text,
.auth-btn-loading {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
}

.spinner {
  animation: spin 1s linear infinite;
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.auth-divider {
  text-align: center;
  color: var(--text-muted);
  font-size: 12px;
  padding: 4px 0;
  position: relative;
}

.auth-divider::before,
.auth-divider::after {
  content: '';
  position: absolute;
  top: 50%;
  width: calc(50% - 60px);
  height: 1px;
  background: var(--border);
}

.auth-divider::before { left: 0; }
.auth-divider::after { right: 0; }

.auth-oauth-btn {
  width: 100%;
  padding: 9px 24px;
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 14px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: all 0.2s;
}

.auth-oauth-btn:hover:not(:disabled) {
  background: var(--bg-hover);
  border-color: var(--border-light);
}

.auth-oauth-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.auth-footer {
  text-align: center;
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px solid var(--border);
  font-size: 11px;
  color: var(--text-muted);
  letter-spacing: 0.3px;
}

/* 亮色主题适配 */
[data-theme="light"] .login-page {
  background: var(--modal-overlay-bg);
}

[data-theme="light"] .login-card {
  background: white;
  border-color: rgba(0, 0, 0, 0.08);
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.12);
}

[data-theme="light"] .auth-tab-indicator {
  background: white;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

[data-theme="light"] .auth-btn {
  background: linear-gradient(135deg, #8b5cf6, #7c3aed);
}

/* ===== 移动端适配 ===== */
@media (max-width: 768px) {
  .login-card {
    margin: 12px;
    padding: 18px 18px 12px;
    max-width: calc(100vw - 24px);
  }

  .login-logo {
    max-width: 120px;
  }

  .login-subtitle {
    font-size: 12px;
  }

  .auth-tabs {
    margin-bottom: 12px;
  }

  .auth-tab {
    padding: 7px 0;
    font-size: 13px;
  }

  .auth-form {
    gap: 10px;
  }

  .form-input {
    padding: 9px 12px;
    font-size: 14px;
  }

  .auth-btn {
    padding: 10px 20px;
    font-size: 14px;
  }

  .form-options {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .forgot-link {
    font-size: 12px;
  }
}

@media (max-width: 380px) {
  .login-card {
    margin: 8px;
    padding: 16px 14px 12px;
  }

  .login-logo {
    max-width: 110px;
  }

  .auth-footer {
    font-size: 10px;
  }
}

/* ===== 密码强度指示器 ===== */
.password-strength {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: -4px;
}

.strength-bar {
  flex: 1;
  height: 4px;
  background: var(--border);
  border-radius: 2px;
  overflow: hidden;
}

.strength-fill {
  height: 100%;
  width: 0%;
  border-radius: 2px;
  transition: width 0.3s, background-color 0.3s;
}

.strength-fill.weak { width: 33%; background: #ef4444; }
.strength-fill.medium { width: 66%; background: #f59e0b; }
.strength-fill.strong { width: 100%; background: #22c55e; }

.strength-text {
  font-size: 11px;
  color: var(--text-muted);
  min-width: 40px;
  text-align: right;
}

/* ===== 管理员面板 ===== */

/* 面板覆盖层 */
#adminPanel {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 10000;
}

#adminPanel.open {
  display: flex;
}

/* 半透明遮罩 */
.admin-panel-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
}

/* 滑入面板 */
.admin-panel-drawer {
  position: relative;
  width: 480px;
  max-width: 90vw;
  height: 100%;
  margin-left: auto;
  background: var(--bg-secondary);
  border-left: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  transform: translateX(100%);
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: -8px 0 30px rgba(0, 0, 0, 0.3);
}

#adminPanel.open .admin-panel-drawer {
  transform: translateX(0);
}

/* 面板头部 */
.admin-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-tertiary);
  flex-shrink: 0;
}

.admin-panel-title {
  display: flex;
  align-items: center;
  gap: 10px;
}

.admin-panel-title svg {
  color: var(--accent);
}

.admin-panel-title h2 {
  margin: 0;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
}

.admin-panel-close {
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 6px;
  border-radius: 6px;
  transition: all 0.2s;
}

.admin-panel-close:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

/* 统计概览 */
.admin-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--border);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.admin-stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 12px 8px;
  background: var(--bg-secondary);
  gap: 2px;
}

.admin-stat-value {
  font-size: 20px;
  font-weight: 700;
  color: var(--accent);
}

.admin-stat-label {
  font-size: 11px;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* 工具栏 */
.admin-toolbar {
  padding: 12px 20px;
  border-bottom: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 10px;
  flex-shrink: 0;
}

.admin-search-box {
  position: relative;
}

.admin-search-icon {
  position: absolute;
  left: 10px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
}

.admin-search-input {
  width: 100%;
  padding: 8px 12px 8px 32px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-tertiary);
  color: var(--text-primary);
  font-size: 13px;
  outline: none;
  transition: border-color 0.2s;
  box-sizing: border-box;
}

.admin-search-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.1);
}

.admin-search-input::placeholder {
  color: var(--text-muted);
}

/* 筛选标签 */
.admin-filter-tabs {
  display: flex;
  gap: 4px;
}

.admin-filter-tab {
  padding: 5px 12px;
  border: none;
  border-radius: 6px;
  background: transparent;
  color: var(--text-secondary);
  font-size: 12px;
  cursor: pointer;
  transition: all 0.2s;
  font-weight: 500;
}

.admin-filter-tab:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

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

/* 用户列表滚动区 */
.admin-user-list-scroll {
  flex: 1;
  overflow-y: auto;
  padding: 8px;
}

.admin-loading {
  text-align: center;
  padding: 40px 20px;
  color: var(--text-muted);
  font-size: 13px;
}

.admin-empty {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-muted);
  font-size: 14px;
}

.admin-empty svg {
  display: block;
  margin: 0 auto 12px;
  color: var(--text-muted);
  opacity: 0.5;
}

/* 用户卡片 */
.admin-user-card {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px;
  border-radius: var(--radius-sm);
  transition: background 0.15s;
  cursor: default;
}

.admin-user-card:hover {
  background: var(--bg-hover);
}

.admin-user-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 600;
  color: #fff;
  flex-shrink: 0;
  text-transform: uppercase;
}

.admin-user-avatar.admin-avatar {
  background: linear-gradient(135deg, #722ed1, #b37feb);
}

.admin-user-avatar.user-avatar {
  background: linear-gradient(135deg, #3b82f6, #60a5fa);
}

.admin-user-avatar.disabled-avatar {
  background: linear-gradient(135deg, #6b7280, #9ca3af);
}

.admin-user-info {
  flex: 1;
  min-width: 0;
}

.admin-user-display {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.admin-user-meta {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-top: 2px;
}

.admin-user-username {
  font-size: 12px;
  color: var(--text-secondary);
}

.admin-user-status {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  flex-shrink: 0;
}

.admin-user-status.active {
  background: #22c55e;
  box-shadow: 0 0 4px rgba(34, 197, 94, 0.4);
}

.admin-user-status.disabled {
  background: #ef4444;
}

.admin-user-badge {
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 600;
  flex-shrink: 0;
}

.admin-user-badge.badge-admin {
  background: rgba(114, 46, 209, 0.12);
  color: #b37feb;
}

.admin-user-badge.badge-user {
  background: rgba(59, 130, 246, 0.12);
  color: #60a5fa;
}

.admin-user-time {
  font-size: 11px;
  color: var(--text-muted);
  flex-shrink: 0;
  text-align: right;
  min-width: 80px;
}

/* 面板底部 */
.admin-footer {
  padding: 12px 20px;
  border-top: 1px solid var(--border);
  background: var(--bg-tertiary);
  flex-shrink: 0;
}

.admin-create-btn {
  width: 100%;
  padding: 10px;
  border: 1px solid var(--accent);
  border-radius: var(--radius-sm);
  background: var(--accent);
  color: #fff;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: all 0.2s;
}

.admin-create-btn:hover {
  filter: brightness(1.1);
  box-shadow: 0 4px 12px rgba(139, 92, 246, 0.3);
}

/* 新建用户表单 */
.create-user-overlay {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 10002;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  align-items: center;
  justify-content: center;
}

.create-user-overlay.open {
  display: flex;
}

.create-user-modal {
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
  width: 400px;
  max-width: 90vw;
  overflow: hidden;
}

.create-user-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
}

.create-user-header h3 {
  margin: 0;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
}

.create-user-close {
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 4px;
  border-radius: 4px;
  transition: all 0.2s;
}

.create-user-close:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.create-user-body {
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.create-field label {
  display: block;
  font-size: 12px;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.create-field input,
.create-field select {
  width: 100%;
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-tertiary);
  color: var(--text-primary);
  font-size: 13px;
  outline: none;
  transition: border-color 0.2s;
  box-sizing: border-box;
}

.create-field input:focus,
.create-field select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.1);
}

.create-user-footer {
  display: flex;
  gap: 8px;
  justify-content: flex-end;
  padding: 16px 20px;
  border-top: 1px solid var(--border);
}

.create-btn {
  padding: 8px 20px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
  border: 1px solid var(--border);
  background: var(--bg-secondary);
  color: var(--text-primary);
}

.create-btn:hover {
  background: var(--bg-hover);
}

.create-btn.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.create-btn.primary:hover {
  filter: brightness(1.1);
}

/* 确认对话框 */
.confirm-overlay {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 10003;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  align-items: center;
  justify-content: center;
}

.confirm-overlay.open {
  display: flex;
}

.confirm-modal {
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
  width: 380px;
  max-width: 90vw;
  padding: 24px;
  text-align: center;
}

.confirm-icon {
  margin: 0 auto 16px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(239, 68, 68, 0.1);
  color: #ef4444;
  display: flex;
  align-items: center;
  justify-content: center;
}

.confirm-modal h3 {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
}

.confirm-modal p {
  margin: 0 0 20px;
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.5;
}

.confirm-actions {
  display: flex;
  gap: 8px;
  justify-content: center;
}

.confirm-btn {
  padding: 8px 24px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
  border: 1px solid var(--border);
  background: var(--bg-secondary);
  color: var(--text-primary);
}

.confirm-btn:hover {
  background: var(--bg-hover);
}

.confirm-btn.danger {
  background: #ef4444;
  border-color: #ef4444;
  color: #fff;
}

.confirm-btn.danger:hover {
  background: #dc2626;
}

/* 用户卡片操作按钮 */
.admin-user-actions {
  position: relative;
  display: flex;
  gap: 4px;
  opacity: 0;
  transition: opacity 0.15s;
}

.admin-user-card:hover .admin-user-actions {
  opacity: 1;
}

.admin-action-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px 6px;
  border-radius: 4px;
  font-size: 12px;
  transition: all 0.15s;
}

.admin-action-btn:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.admin-action-btn.delete-btn:hover {
  color: #ef4444;
  background: rgba(239, 68, 68, 0.1);
}

.admin-action-btn.toggle-btn:hover {
  color: #f59e0b;
  background: rgba(245, 158, 11, 0.1);
}

/* 亮色主题适配 */
[data-theme="light"] .admin-panel-drawer {
  box-shadow: -8px 0 30px rgba(0, 0, 0, 0.1);
}

[data-theme="light"] .admin-stat-item {
  background: #fff;
}

[data-theme="light"] .create-user-modal,
[data-theme="light"] .confirm-modal {
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
}

[data-theme="light"] .admin-user-card:hover {
  background: rgba(0, 0, 0, 0.03);
}


/* ===== 用户 Profile ===== */
/* ===== 侧边栏底部用户区 ===== */
.user-profile {
  display: none;
  align-items: center;
  gap: 8px;
  padding: 6px 8px;
  margin: 0 8px 8px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background 0.2s;
  border: 1px solid transparent;
}

.user-profile:hover {
  background: var(--bg-tertiary);
}

.user-profile.visible {
  display: flex;
}

.user-avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: linear-gradient(135deg, #8b5cf6, #3b82f6);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  flex-shrink: 0;
  text-transform: uppercase;
}

.user-info {
  flex: 1;
  min-width: 0;
}

.user-name {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.user-more-btn {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 4px;
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.15s;
}

.user-more-btn:hover {
  background: var(--bg-hover);
  color: var(--text-secondary);
}

.user-profile.open .user-more-btn {
  color: var(--accent);
}

/* 侧边栏登录按钮 */
.login-sidebar-btn {
  position: relative;
  width: calc(100% - 16px);
  margin: 0 8px 8px;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  border: none;
  background: linear-gradient(135deg, #8b5cf6, #7c3aed);
  color: #fff;
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: all 0.25s;
  overflow: hidden;
}

.login-sidebar-btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.1), transparent);
  opacity: 0;
  transition: opacity 0.25s;
}

.login-sidebar-btn:hover {
  background: linear-gradient(135deg, #9b6ff6, #8b5cf6);
  box-shadow: 0 4px 16px rgba(139, 92, 246, 0.3);
  transform: translateY(-1px);
}

.login-sidebar-btn:hover::after {
  opacity: 1;
}

.login-sidebar-btn:active {
  transform: translateY(0);
  box-shadow: 0 2px 8px rgba(139, 92, 246, 0.2);
}

[data-theme="light"] .login-sidebar-btn {
  background: linear-gradient(135deg, #7c3aed, #6d28d9);
}

[data-theme="light"] .login-sidebar-btn:hover {
  background: linear-gradient(135deg, #8b5cf6, #7c3aed);
}

/* ===== 用户下拉菜单（固定浮层，向上展开） ===== */
.user-dropdown {
  display: none;
  position: fixed;
  z-index: 9000;
  width: 240px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.5);
}

.user-dropdown.open {
  display: block;
  animation: dropdownSlideUp 0.2s ease;
}

@keyframes dropdownSlideUp {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* 账户卡片 */
.dropdown-account-card {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 12px;
  border-bottom: 1px solid var(--border);
}

.dropdown-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: linear-gradient(135deg, #8b5cf6, #3b82f6);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  flex-shrink: 0;
  text-transform: uppercase;
}

.dropdown-account-info {
  flex: 1;
  min-width: 0;
}

.dropdown-account-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.dropdown-account-role {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 2px;
}

.dropdown-divider {
  height: 1px;
  background: var(--border);
  margin: 4px 0;
}

/* 菜单项 */
.dropdown-item {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 14px;
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 13px;
  cursor: pointer;
  transition: all 0.12s;
  text-align: left;
}

.dropdown-item:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.dropdown-item.dropdown-logout {
  color: #ef4444;
}

.dropdown-item.dropdown-logout:hover {
  background: rgba(239, 68, 68, 0.1);
  color: #ef4444;
}

.dropdown-theme-label {
  font-size: 13px;
}

/* 亮色主题适配 */
[data-theme="light"] .user-profile:hover {
  background: rgba(0, 0, 0, 0.05);
}

[data-theme="light"] .user-dropdown {
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
}

[data-theme="light"] .dropdown-item:hover {
  background: rgba(0, 0, 0, 0.05);
}

[data-theme="light"] .dropdown-item.dropdown-logout:hover {
  background: rgba(239, 68, 68, 0.08);
}


/* ===== 2026-09-21: 聚酰亚胺知识图谱 (KG) 卡片 ===== */
.kg-cards { margin-top: 10px; display: flex; flex-direction: column; gap: 8px; }
.kg-card {
  border: 1px solid var(--border);
  border-left: 3px solid #4f8cff;
  border-radius: 8px;
  padding: 10px 12px;
  background: var(--bg-secondary, rgba(255,255,255,0.03));
  font-size: 13px;
  line-height: 1.5;
}
.kg-head { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.kg-badge {
  background: #4f8cff; color: #fff; font-size: 10px; font-weight: 700;
  padding: 1px 6px; border-radius: 4px; letter-spacing: 0.5px;
}
.kg-name { font-weight: 600; font-size: 14px; }
.kg-type {
  font-size: 11px; color: var(--text-muted, #8a93a6);
  border: 1px solid var(--border);
  padding: 0 6px; border-radius: 10px;
}
.kg-sub { color: var(--text-muted, #8a93a6); margin-top: 2px; }
.kg-meta { margin-top: 6px; display: flex; gap: 12px; flex-wrap: wrap; font-size: 12px; }
.kg-iri { color: var(--text-muted, #8a93a6); font-family: ui-monospace, monospace; word-break: break-all; }
.kg-cid { color: #4f8cff; text-decoration: none; }
.kg-cid:hover { text-decoration: underline; }
.kg-props { margin-top: 8px; border-collapse: collapse; width: 100%; }
.kg-props td { padding: 3px 8px; border: 1px solid var(--border); font-size: 12px; }
.kg-props .kg-k { color: var(--text-muted, #8a93a6); white-space: nowrap; width: 1%; }
.kg-props .kg-v { font-weight: 600; }
.kg-desc { margin-top: 8px; color: var(--text-muted, #8a93a6); font-size: 12px; }

/* 2026-09-21 v1.0.7: 长任务实时状态提示 */
.gen-status {
  color: var(--text-muted, #8a93a6);
  font-size: 13px;
  padding: 6px 0;
  display: flex;
  align-items: center;
  gap: 6px;
}
.gen-status::before {
  content: '';
  width: 8px; height: 8px;
  border-radius: 50%;
  background: #4f8cff;
  animation: genpulse 1.2s ease-in-out infinite;
}
@keyframes genpulse {
  0%, 100% { opacity: 0.3; transform: scale(0.85); }
  50% { opacity: 1; transform: scale(1.15); }
}

/* 2026-09-21 v1.2.0: 任务队列指示器 */
.queue-badge {
  margin-left: auto;
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 10px;
  background: var(--warning, #f59e0b);
  color: #fff;
  white-space: nowrap;
}
.queue-badge.idle { background: var(--success, #10b981); }

/* 2026-09-29 014: 移动端触控目标 ≥32px */
@media (max-width: 768px) {
  .chat-item-delete { padding: 10px; }
  .tool-btn { padding: 10px; }
  .modal-close { padding: 10px; }
  .upload-chip .remove { min-width: 32px; min-height: 32px; display: flex; align-items: center; justify-content: center; }
}

/* 2026-09-29 015: 动晕症用户豁免动画 */
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}