/* ================================================================
   Min.Max AI Lab · 核心样式
   设计语言：玻璃拟态 + 极光渐变 + 流畅微交互
   ================================================================ */

/* ---------- 设计变量 ---------- */
:root {
  /* 主色调 */
  --c-violet: #a78bfa;
  --c-violet-d: #7c3aed;
  --c-blue: #60a5fa;
  --c-blue-d: #2563eb;
  --c-cyan: #22d3ee;
  --c-emerald: #34d399;
  --c-amber: #fbbf24;
  --c-rose: #fb7185;

  /* 深色主题（太空感深蓝紫调） */
  --bg: #0b0c14;
  --bg-2: #12131e;
  --surface: rgba(255, 255, 255, 0.035);
  --surface-2: rgba(255, 255, 255, 0.06);
  --surface-3: rgba(255, 255, 255, 0.09);
  --surface-hover: rgba(255, 255, 255, 0.08);
  --glass: rgba(16, 17, 27, 0.88);
  --glass-2: rgba(22, 24, 36, 0.92);
  --border: rgba(255, 255, 255, 0.07);
  --border-2: rgba(255, 255, 255, 0.13);
  --border-strong: rgba(255, 255, 255, 0.22);

  --text: #f1f5f9;
  --text-2: #cbd5e1;
  --text-3: #94a3b8;
  --text-4: #64748b;

  --shadow: 0 20px 60px -15px rgba(0, 0, 0, 0.6);
  --shadow-glow: 0 0 40px -10px rgba(167, 139, 250, 0.35);
  --shadow-soft: 0 8px 30px -10px rgba(0, 0, 0, 0.4);

  --grad-primary: linear-gradient(135deg, #a78bfa 0%, #60a5fa 50%, #22d3ee 100%);
  --grad-violet: linear-gradient(135deg, #a78bfa 0%, #7c3aed 100%);
  --grad-blue: linear-gradient(135deg, #60a5fa 0%, #2563eb 100%);
  --grad-emerald: linear-gradient(135deg, #34d399 0%, #059669 100%);

  --radius: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-sm: 10px;
  --radius-pill: 999px;

  --sidebar-w: 280px;
  --sidebar-w-collapsed: 0px;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);

  --font-size-base: 15px;
}

/* 浅色主题 */
[data-theme="light"] {
  --bg: #f5f6fb;
  --bg-2: #ffffff;
  --surface: rgba(0, 0, 0, 0.03);
  --surface-2: rgba(0, 0, 0, 0.04);
  --surface-3: rgba(0, 0, 0, 0.06);
  --surface-hover: rgba(0, 0, 0, 0.05);
  --glass: rgba(255, 255, 255, 0.7);
  --glass-2: rgba(255, 255, 255, 0.85);
  --border: rgba(0, 0, 0, 0.08);
  --border-2: rgba(0, 0, 0, 0.12);
  --border-strong: rgba(0, 0, 0, 0.2);
  --text: #0f172a;
  --text-2: #334155;
  --text-3: #64748b;
  --text-4: #94a3b8;
  --shadow: 0 20px 60px -15px rgba(15, 23, 42, 0.2);
  --shadow-glow: 0 0 40px -10px rgba(124, 58, 237, 0.25);
  --shadow-soft: 0 8px 30px -10px rgba(15, 23, 42, 0.15);
}

/* 字号 */
[data-font="small"] { --font-size-base: 14px; }
[data-font="medium"] { --font-size-base: 15px; }
[data-font="large"] { --font-size-base: 17px; }

/* ---------- 重置 ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

/* ============ 世界顶级性能优化 ============ */
/* CSS Containment：隔离渲染，一个元素变化不触发整页重排 */
.app, .sidebar, .main, .chat, .composer, .modal__panel { contain: layout style; }
.msg { contain: layout style paint; }
/* Content Visibility：屏幕外消息跳过渲染（长对话 10x 提速） */
.load-more-sentinel { padding: 16px 0; text-align: center; }
.load-more-btn { display: inline-flex; align-items: center; gap: 8px; padding: 8px 18px; border-radius: 999px; background: var(--surface); border: 1px solid var(--border-2); color: var(--text-3); font-size: 12.5px; font-weight: 500; cursor: pointer; transition: all 0.2s; }
.load-more-btn:hover { background: var(--surface-2); color: var(--c-violet); border-color: rgba(167,139,250,0.3); transform: translateY(-1px); }
.load-more-spinner { display: inline-block; width: 12px; height: 12px; border: 2px solid var(--c-violet); border-top-color: transparent; border-radius: 50%; }

.msg { content-visibility: auto; contain-intrinsic-size: auto 120px; }
/* 文本/滚动/触摸优化 */
body { text-rendering: optimizeSpeed; }
.chat, .conv-list, .modal__body, .api-panel__list, .api-panel__form {
  -webkit-overflow-scrolling: touch; overscroll-behavior: contain;
}
input, textarea, button, select { touch-action: manipulation; }

/* 尊重用户的「减少动画」系统设置 */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* 字体平滑（抗锯齿） */
body { -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }

/* 滚动锚定：加载更多消息时不跳动 */
.chat { overflow-anchor: auto; }

html, body { height: 100%; overflow: hidden; }

/* [hidden] 必须用最高优先级强制，避免被 display:flex/inline-flex 覆盖 */
[hidden] { display: none !important; }
.modal { /* modal 容器本身 display:grid，单独恢复 */ }
.modal:not([hidden]) { display: grid; place-items: center; }
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: var(--font-size-base);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow: hidden;
}
button, input, textarea, select { font: inherit; color: inherit; }
button { cursor: pointer; border: none; background: none; }
input, textarea { outline: none; border: none; background: none; }
a { color: inherit; text-decoration: none; }
::selection { background: rgba(167, 139, 250, 0.35); color: #fff; }

/* 滚动条 */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(255, 255, 255, 0.1); border-radius: 8px; border: 2px solid transparent; background-clip: padding-box; }
::-webkit-scrollbar-thumb:hover { background: rgba(255, 255, 255, 0.2); background-clip: padding-box; }
[data-theme="light"] ::-webkit-scrollbar-thumb { background: rgba(0,0,0,0.12); background-clip: padding-box; }

/* ---------- 极光背景 ---------- */
.aurora {
  position: fixed; inset: 0; z-index: -1; overflow: hidden;
  background: var(--bg);
}
/* 顶部微光：模拟环境光源（纯渐变，零动画开销） */
.aurora::before {
  content: ""; position: absolute; top: -30%; left: 50%; transform: translateX(-50%);
  width: 120%; height: 60%;
  background: radial-gradient(ellipse at center, rgba(99, 102, 241, 0.08) 0%, transparent 60%);
  pointer-events: none;
}
/* 二次元背景图（夜轻/dmoe 随机图） */
.aurora__bg-img {
  position: absolute; inset: 0;
  background-size: cover; background-position: center;
  background-repeat: no-repeat;
  opacity: 0; /* 由 JS 加载后淡入 */
  transition: opacity 1.2s var(--ease);
  transform: translateZ(0);
}
.aurora__bg-img.is-loaded { opacity: 0.18; }
[data-theme="light"] .aurora__bg-img.is-loaded { opacity: 0.22; }
body.is-streaming .aurora__bg-img { opacity: 0.18; }
/* 暗色渐变遮罩：保证前景文字可读 */
.aurora__overlay {
  position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(10,10,15,0.55) 0%, rgba(10,10,15,0.72) 60%, rgba(10,10,15,0.85) 100%);
  }
[data-theme="light"] .aurora__overlay {
  background: linear-gradient(180deg, rgba(245,246,251,0.6) 0%, rgba(245,246,251,0.75) 60%, rgba(245,246,251,0.88) 100%);
}

/* 全局流光带：斜向移动的彩色渐变（GPU 合成层，低开销） */
.aurora__stream {
  display: none;
  position: absolute; top: -50%; left: -50%; width: 200%; height: 200%;
  background: linear-gradient(115deg,
    transparent 0%,
    rgba(167,139,250,0.10) 18%,
    rgba(96,165,250,0.10) 32%,
    rgba(34,211,238,0.10) 46%,
    transparent 58%,
    rgba(52,211,153,0.08) 72%,
    rgba(251,191,36,0.08) 86%,
    transparent 100%);
  background-size: 280% 280%;
  animation: none;
  pointer-events: none;
  opacity: 0.5;
  will-change: background-position;
  transform: translateZ(0);
}
body.is-streaming .aurora__stream { animation-play-state: paused; opacity: 0.4; }
[data-theme="light"] .aurora__stream { opacity: 0.4; }
@keyframes stream-move {
  0% { background-position: 0% 0%; }
  100% { background-position: 280% 0%; }
}

.aurora__blob {
  position: absolute; border-radius: 50%; filter: blur(50px); opacity: 0;
  animation: none;
  will-change: transform; /* 提示浏览器 GPU 合成，减少重绘 */
  transform: translateZ(0); /* 强制独立合成层 */
}
/* 流式生成时降低背景动画开销 */
body.is-streaming .aurora__blob { animation-play-state: paused; opacity: 0.3; }
.aurora__blob--1 {
  width: 480px; height: 480px; top: -150px; left: -100px;
  background: radial-gradient(circle, #7c3aed 0%, transparent 70%);
}
.aurora__blob--2 {
  width: 520px; height: 520px; bottom: -200px; right: -150px;
  background: radial-gradient(circle, #2563eb 0%, transparent 70%);
  animation-delay: -7s;
}
.aurora__blob--3 {
  width: 400px; height: 400px; top: 40%; left: 50%;
  background: radial-gradient(circle, #06b6d4 0%, transparent 70%);
  animation-delay: -14s;
}
[data-theme="light"] .aurora__blob { opacity: 0.25; }
[data-theme="light"] .aurora__blob--1 { background: radial-gradient(circle, #c4b5fd 0%, transparent 70%); }
[data-theme="light"] .aurora__blob--2 { background: radial-gradient(circle, #93c5fd 0%, transparent 70%); }
[data-theme="light"] .aurora__blob--3 { background: radial-gradient(circle, #67e8f9 0%, transparent 70%); }

@keyframes float {
  0%, 100% { transform: translate(0,0) scale(1); }
  33% { transform: translate(80px,-60px) scale(1.15); }
  66% { transform: translate(-60px,80px) scale(0.9); }
}

.grain {
  position: absolute; inset: 0; opacity: 0; pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='n'%3E%3CfeTurbulence baseFrequency='0.9' numOctaves='3' /%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' /%3E%3C/svg%3E");
}

/* ---------- App 布局 ---------- */
.app {
  display: grid;
  grid-template-columns: var(--sidebar-w) 1fr;
  grid-template-rows: 100%; /* 单行撑满，防止子项被内容撑高 */
  height: 100vh;
  height: 100dvh;
  overflow: hidden;
  transition: grid-template-columns 0.4s var(--ease);
}
.app.is-collapsed { grid-template-columns: var(--sidebar-w-collapsed) 1fr; }

/* ---------- 侧边栏 ---------- */
.sidebar {
  display: flex; flex-direction: column;
  box-shadow: inset 1px 0 0 rgba(255,255,255,0.05);
  background: rgba(12, 12, 20, 0.92);
  background: var(--glass);
    border-right: 1px solid var(--border);
  overflow: hidden;
  transition: transform 0.4s var(--ease), opacity 0.4s var(--ease);
}
.app.is-collapsed .sidebar { transform: translateX(-100%); opacity: 0; }

.sidebar__head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px 18px 12px;
}
.brand { display: flex; align-items: center; gap: 10px; min-width: 0; }
.brand__logo {
  display: grid; place-items: center;
  filter: drop-shadow(0 4px 12px rgba(167,139,250,0.4));
  flex-shrink: 0;
}
.brand__text { display: flex; flex-direction: column; min-width: 0; }
.brand__name {
  font-size: 16px; font-weight: 700; letter-spacing: -0.01em;
  background: var(--grad-primary); -webkit-background-clip: text; background-clip: text; color: transparent;
}
.brand__sub { font-size: 11px; color: var(--text-4); letter-spacing: 0.02em; }

.icon-btn {
  display: grid; place-items: center;
  width: 34px; height: 34px; border-radius: var(--radius-sm);
  color: var(--text-3);
  transition: all 0.2s var(--ease);
}
.icon-btn:hover { background: var(--surface-2); color: var(--text); }

.new-chat {
  display: flex; align-items: center; gap: 10px;
  margin: 4px 14px 12px; padding: 11px 14px;
  border-radius: var(--radius);
  background: var(--grad-primary);
  color: #fff; font-weight: 600; font-size: 14px;
  box-shadow: 0 6px 24px -6px rgba(124, 58, 237, 0.45), inset 0 1px 0 rgba(255,255,255,0.2), inset 0 -1px 0 rgba(0,0,0,0.15);
  transition: all 0.25s var(--ease);
  position: relative; overflow: hidden;
}
.new-chat::before {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.2), transparent);
  opacity: 0; transition: opacity 0.25s;
}
.new-chat:hover { transform: translateY(-1px); box-shadow: 0 10px 28px -6px rgba(124,58,237,0.6), inset 0 1px 0 rgba(255,255,255,0.3); }
.new-chat:hover::before { opacity: 1; }
.new-chat:active { transform: translateY(0); }
.new-chat svg { flex-shrink: 0; }
.new-chat span { flex: 1; text-align: left; }
.new-chat kbd {
  font-size: 10px; padding: 2px 6px; border-radius: 5px;
  background: rgba(0,0,0,0.25); color: rgba(255,255,255,0.9);
  font-family: 'JetBrains Mono', monospace;
}

.search-box {
  display: flex; align-items: center; gap: 8px;
  margin: 0 14px 8px; padding: 8px 12px;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  transition: border-color 0.2s;
}
.search-box:focus-within { border-color: var(--c-violet); }
.search-box svg { color: var(--text-4); flex-shrink: 0; }
.search-box input { flex: 1; font-size: 13px; }
.search-box input::placeholder { color: var(--text-4); }

.conv-list {
  flex: 1; overflow-y: auto; padding: 4px 10px;
  display: flex; flex-direction: column; gap: 2px;
}

.conv-item {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 12px; border-radius: var(--radius-sm);
  cursor: pointer; color: var(--text-2);
  transition: all 0.18s var(--ease);
  position: relative;
}
.conv-item:hover { background: var(--surface-2); color: var(--text); }
.conv-item.is-active {
  background: linear-gradient(135deg, rgba(167,139,250,0.18), rgba(96,165,250,0.1));
  color: var(--text);
}
.conv-item.is-active::before {
  content: ''; position: absolute; left: 0; top: 20%; bottom: 20%; width: 3px;
  background: var(--grad-primary); border-radius: 3px;
}
.conv-item__icon { color: var(--text-4); flex-shrink: 0; }
.conv-item__title {
  flex: 1; font-size: 13.5px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.conv-item__del {
  opacity: 0; color: var(--text-4); padding: 4px; border-radius: 6px;
  display: grid; place-items: center;
  transition: all 0.15s;
}
.conv-item:hover .conv-item__del { opacity: 1; }
.conv-item__del:hover { color: var(--c-rose); background: var(--surface-3); }

.conv-empty {
  padding: 30px 16px; text-align: center; color: var(--text-4); font-size: 13px;
}

.sidebar__foot { padding: 10px; border-top: 1px solid var(--border); display: flex; flex-direction: column; gap: 2px; }
.foot-btn {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 12px; border-radius: var(--radius-sm);
  color: var(--text-2); font-size: 13.5px; font-weight: 500;
  transition: all 0.18s;
}
.foot-btn:hover { background: var(--surface-2); color: var(--text); }
.foot-btn span:first-of-type { flex: 1; text-align: left; }
.foot-btn__count {
  font-size: 11px; padding: 1px 8px; border-radius: var(--radius-pill);
  background: var(--surface-3); color: var(--text-2); font-weight: 600;
  font-family: 'JetBrains Mono', monospace;
}

/* ---------- 主聊天区 ---------- */
.main {
  display: flex; flex-direction: column;
  min-width: 0; min-height: 0; position: relative;
  /* 高度由父级 .app 的 grid 行撑满，自身作为 flex 列容器 */
  height: 100%;
  overflow: hidden;
}

.topbar {
  display: flex; align-items: center; gap: 14px;
  background: rgba(12, 12, 20, 0.9);
  flex-shrink: 0; /* 顶栏固定高度，不被压缩 */
  padding: 14px 22px;
  border-bottom: 1px solid var(--border);
  background: var(--glass);
    z-index: 10;
}
.menu-btn { display: none; }
.app.is-collapsed .menu-btn { display: grid; }

.model-selector {
  position: relative; display: flex; align-items: center; gap: 8px;
  padding: 8px 14px; border-radius: var(--radius-pill);
  background: linear-gradient(180deg, var(--surface-2), var(--surface)); border: 1px solid var(--border);
  transition: all 0.2s;
}
.model-selector:hover { border-color: var(--border-2); background: var(--surface-2); }
.model-selector__current { display: flex; align-items: center; gap: 8px; cursor: pointer; }
.model-selector__name { font-size: 13.5px; font-weight: 500; }
.model-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--text-4);
  box-shadow: 0 0 0 0 rgba(52,211,153,0.5);
}
.model-dot.is-active { background: var(--c-emerald); box-shadow: 0 0 6px rgba(52,211,153,0.6); }
@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(52,211,153,0.5); }
  50% { box-shadow: 0 0 0 6px rgba(52,211,153,0); }
}
/* --- 自定义模型下拉面板 --- */
.model-dropdown {
  position: absolute; top: calc(100% + 6px); left: 0; right: 0;
  min-width: 300px; max-height: 400px; z-index: 200;
  display: flex; flex-direction: column;
  background: var(--glass-2); backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border); border-radius: var(--radius);
  box-shadow: 0 12px 40px rgba(0,0,0,0.45);
  opacity: 0; visibility: hidden; transform: translateY(-8px);
  transition: opacity 0.2s var(--ease), transform 0.2s var(--ease), visibility 0.2s;
  overflow: hidden;
}
.model-dropdown.is-open {
  opacity: 1; visibility: visible; transform: translateY(0);
}
.model-dropdown__search {
  display: flex; align-items: center; gap: 8px;
  padding: 8px 12px; border-bottom: 1px solid var(--border);
  color: var(--text-4); flex-shrink: 0;
}
.model-dropdown__search input {
  flex: 1; background: none; border: none; outline: none;
  color: var(--text-1); font-size: 13px; font-family: inherit;
}
.model-dropdown__search input::placeholder { color: var(--text-4); }
.model-dropdown__list {
  overflow-y: auto; flex: 1; padding: 4px 0;
}
.model-dropdown__list::-webkit-scrollbar { width: 4px; }
.model-dropdown__list::-webkit-scrollbar-thumb { background: var(--text-4); border-radius: 2px; }

/* 分组头 */
.model-group {
  user-select: none;
}
.model-group__header {
  display: flex; align-items: center; gap: 8px;
  padding: 6px 12px; cursor: pointer;
  font-size: 11px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.04em;
  color: var(--text-3);
  transition: background 0.15s;
}
.model-group__header:hover { background: rgba(255,255,255,0.04); }
.model-group__emoji { font-size: 14px; }
.model-group__arrow {
  margin-left: auto; transition: transform 0.2s var(--ease);
  color: var(--text-4); font-size: 10px;
}
.model-group.is-collapsed .model-group__arrow { transform: rotate(-90deg); }
.model-group.is-collapsed .model-group__items { display: none; }

/* 模型项 */
.model-group__items { padding: 2px 0; }
.model-subgroup__header {
  padding: 6px 12px 3px 28px;
  font-size: 11px; font-weight: 600; color: var(--text-4);
  text-transform: uppercase; letter-spacing: 0.06em;
  border-top: 1px solid rgba(255,255,255,0.04);
  user-select: none;
}
.model-item {
  display: flex; align-items: center; gap: 8px;
  padding: 7px 12px 7px 28px; cursor: pointer;
  font-size: 13px; color: var(--text-2);
  transition: background 0.12s, color 0.12s;
  border-left: 2px solid transparent;
}
.model-item:hover {
  background: rgba(167,139,250,0.08); color: var(--text-1);
}
.model-item.is-active {
  background: rgba(167,139,250,0.12); color: var(--c-violet);
  border-left-color: var(--c-violet);
}
.model-item__name { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.model-item__tag {
  font-size: 10px; padding: 1px 5px; border-radius: 4px;
  background: rgba(255,255,255,0.06); color: var(--text-4);
  flex-shrink: 0; text-transform: uppercase; letter-spacing: 0.03em;
}
.model-item__builtin {
  font-size: 11px; color: var(--c-amber); flex-shrink: 0;
}
.model-item__dot {
  width: 6px; height: 6px; border-radius: 50%; flex-shrink: 0;
}
.model-dropdown__empty {
  padding: 24px; text-align: center; color: var(--text-4); font-size: 13px;
}
.model-selector__chevron { color: var(--text-4); pointer-events: none; }

.topbar__actions { margin-left: auto; display: flex; gap: 4px; }

/* ---------- 欢迎屏 ---------- */
.welcome {
  flex: 1; display: grid; place-items: center;
  overflow-y: auto; padding: 40px 24px;
}
.welcome__inner { max-width: 760px; width: 100%; text-align: center; animation: rise 0.6s var(--ease) both; }
@keyframes rise { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }

.welcome__logo {
  display: inline-grid; place-items: center; margin-bottom: 24px;
  filter: drop-shadow(0 8px 30px rgba(167,139,250,0.4));
  animation: none;
}
@keyframes spin-slow { to { transform: rotate(360deg); } }

.welcome__title {
  font-size: clamp(28px, 5vw, 42px); font-weight: 800; letter-spacing: -0.02em; line-height: 1.15;
  margin-bottom: 10px;
}
.gradient-text {
  background: var(--grad-primary); -webkit-background-clip: text; background-clip: text; color: transparent;
  background-size: 200% 200%;
}
@keyframes grad-move { 0%,100% { background-position: 0% 50%; } 50% { background-position: 100% 50%; } }

.welcome__desc { color: var(--text-3); font-size: 15px; margin-bottom: 36px; }

.suggestions {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px;
}
.suggestion-card {
  display: flex; align-items: center; gap: 14px; text-align: left;
  padding: 16px 18px; border-radius: var(--radius);
  background: var(--glass-2); backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
  border: 1px solid var(--border);
  transition: all 0.28s var(--ease);
  position: relative; overflow: hidden;
}
.suggestion-card::before {
  content: ''; position: absolute; inset: 0; opacity: 0;
  background: radial-gradient(circle at var(--mx,50%) var(--my,50%), rgba(167,139,250,0.12), transparent 60%);
  transition: opacity 0.3s;
}
.suggestion-card:hover {
  transform: translateY(-3px); border-color: var(--border-2);
  box-shadow: var(--shadow-soft);
}
.suggestion-card:hover::before { opacity: 1; }
.suggestion-card__icon {
  display: grid; place-items: center; width: 40px; height: 40px; border-radius: 12px; flex-shrink: 0;
  background: linear-gradient(135deg, var(--c1), var(--c2));
  color: #fff; box-shadow: 0 6px 16px -6px var(--c1);
}
.suggestion-card__body { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.suggestion-card__title { font-size: 14px; font-weight: 600; color: var(--text); }
.suggestion-card__desc { font-size: 12.5px; color: var(--text-3); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

@media (max-width: 600px) {
  .suggestions { grid-template-columns: 1fr; }
}

/* ---------- 聊天区 ---------- */
.chat {
  flex: 1 1 0; min-height: 0; overflow-y: auto; padding: 24px 0;
  scroll-behavior: smooth;
}
.chat[hidden] { display: none; }
.chat__inner { max-width: 820px; margin: 0 auto; padding: 0 24px; display: flex; flex-direction: column; gap: 28px; }

.msg { display: flex; gap: 16px; animation: msg-in 0.4s var(--ease) both; }
@keyframes msg-in { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: translateY(0); } }

.msg__avatar {
  width: 34px; height: 34px; border-radius: 10px; flex-shrink: 0;
  display: grid; place-items: center; font-weight: 700; font-size: 14px; color: #fff;
}
.msg--user .msg__avatar { background: var(--grad-blue); }
.msg--ai .msg__avatar { background: var(--grad-violet); box-shadow: 0 0 16px -2px rgba(124,58,237,0.4), inset 0 1px 0 rgba(255,255,255,0.15); }

.msg__body { flex: 1; min-width: 0; }
.msg__name { font-size: 13px; font-weight: 600; color: var(--text-2); margin-bottom: 4px; }
.msg__content { color: var(--text); font-size: var(--font-size-base); line-height: 1.7; word-wrap: break-word; overflow-wrap: break-word; }

/* Markdown 内容样式 */
.msg__content > *:first-child { margin-top: 0; }
.msg__content > *:last-child { margin-bottom: 0; }
.msg__content p { margin: 0.6em 0; }
.msg__content h1, .msg__content h2, .msg__content h3, .msg__content h4 { margin: 1.2em 0 0.5em; font-weight: 700; line-height: 1.3; }
.msg__content h1 { font-size: 1.6em; }
.msg__content h2 { font-size: 1.4em; }
.msg__content h3 { font-size: 1.2em; }
.msg__content ul, .msg__content ol { margin: 0.6em 0; padding-left: 1.4em; }
.msg__content li { margin: 0.3em 0; }
.msg__content li::marker { color: var(--c-violet); }
.msg__content a { color: var(--c-blue); text-decoration: underline; text-underline-offset: 2px; }
.msg__content blockquote {
  margin: 0.8em 0; padding: 8px 16px; border-left: 3px solid var(--c-violet);
  background: var(--surface); border-radius: 0 8px 8px 0; color: var(--text-2);
}
.msg__content code:not(pre code) {
  font-family: 'JetBrains Mono', monospace; font-size: 0.88em;
  background: var(--surface-3); padding: 2px 6px; border-radius: 5px;
  color: var(--c-violet);
}
.msg__content pre {
  margin: 0.9em 0; border-radius: var(--radius); overflow: hidden;
  background: #0d1117 !important; border: 1px solid var(--border);
}
[data-theme="light"] .msg__content pre { background: #f6f8fa !important; }
.msg__content pre code {
  display: block; padding: 14px 16px; font-family: 'JetBrains Mono', monospace;
  font-size: 13px; line-height: 1.6; overflow-x: auto;
}
.msg__content table {
  width: 100%; margin: 0.9em 0; border-collapse: collapse; font-size: 0.92em;
  border: 1px solid var(--border-2); border-radius: var(--radius-sm); overflow: hidden;
}
.msg__content th, .msg__content td { padding: 9px 13px; border: 1px solid var(--border); }
.msg__content th { background: var(--surface-2); font-weight: 600; text-align: left; }
.msg__content hr { margin: 1.4em 0; border: none; border-top: 1px solid var(--border-2); }

/* 代码块工具栏 */
.code-block { position: relative; }
.code-block__bar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 6px 8px 6px 14px; background: rgba(255,255,255,0.04);
  border-bottom: 1px solid var(--border); font-size: 12px; color: var(--text-3);
  font-family: 'JetBrains Mono', monospace;
}
.code-block__copy {
  display: flex; align-items: center; gap: 4px; padding: 4px 8px; border-radius: 6px;
  font-size: 11px; color: var(--text-3); transition: all 0.15s;
}
.code-block__copy:hover { background: var(--surface-3); color: var(--text); }
.code-block__copy.is-copied { color: var(--c-emerald); }

.msg__actions {
  display: flex; gap: 4px; margin-top: 10px; opacity: 0;
  transition: opacity 0.2s;
}
.msg:hover .msg__actions { opacity: 1; }
.msg__action {
  display: flex; align-items: center; gap: 5px; padding: 5px 9px; border-radius: 7px;
  font-size: 12px; color: var(--text-3); transition: all 0.15s;
}
.msg__action:hover { background: var(--surface-2); color: var(--text); }

/* 用户消息编辑模式 */
.msg__edit-area {
  width: 100%; resize: none; padding: 10px 12px;
  border-radius: var(--radius); background: var(--surface-2);
  border: 1px solid var(--c-violet); color: var(--text);
  font-size: var(--font-size-base); line-height: 1.5; font-family: inherit;
  box-shadow: 0 0 0 3px rgba(167,139,250,0.12);
}
.msg__edit-area:focus { outline: none; }
.msg__edit-bar {
  display: flex; justify-content: flex-end; gap: 8px; margin-top: 8px;
}

/* 版本导航 */
.msg__version-nav {
  display: flex; align-items: center; justify-content: center; gap: 6px;
  margin-top: 8px;
  padding: 4px 0;
}
.msg__version-btn {
  width: 26px; height: 26px; border-radius: 7px;
  display: grid; place-items: center;
  font-size: 10px; color: var(--text-3);
  background: var(--surface-2); border: 1px solid var(--border);
  transition: all 0.18s var(--ease);
}
.msg__version-btn:hover:not(:disabled) {
  background: var(--surface-3); color: var(--text); border-color: var(--border-2);
}
.msg__version-btn:disabled {
  opacity: 0.35; cursor: not-allowed;
}
.msg__version-label {
  font-size: 12px; color: var(--text-4); font-weight: 500;
  font-variant-numeric: tabular-nums; min-width: 36px; text-align: center;
  user-select: none;
}

/* 打字光标 */
.typing-cursor {
  display: inline-block; width: 8px; height: 1.1em; vertical-align: text-bottom;
  background: var(--c-violet); margin-left: 2px; border-radius: 1px;
  animation: blink 1s steps(2) infinite;
}
@keyframes blink { 50% { opacity: 0; } }

/* 思考点 */
.thinking-dots { display: inline-flex; gap: 5px; padding: 8px 0; }
.thinking-dots span {
  width: 8px; height: 8px; border-radius: 50%; background: var(--c-violet);
  animation: bounce 1.4s ease-in-out infinite;
}
.thinking-dots span:nth-child(2) { animation-delay: 0.15s; }
.thinking-dots span:nth-child(3) { animation-delay: 0.3s; }
@keyframes bounce {
  0%, 80%, 100% { transform: scale(0.5); opacity: 0.4; }
  40% { transform: scale(1); opacity: 1; }
}

/* ---------- 输入区 ---------- */
.composer {
  flex-shrink: 0; /* 输入区永远不被压缩，固定在底部 */
  padding: 8px 24px 16px;
  background: linear-gradient(to top, var(--bg) 60%, transparent);
}
.composer__wrap {
  max-width: 820px; margin: 0 auto;
  background: linear-gradient(180deg, rgba(28, 29, 42, 0.95), rgba(18, 19, 30, 0.95));
  background: var(--glass-2);
    border: 1px solid var(--border-2); border-radius: var(--radius-xl);
  padding: 8px 8px 8px 8px;
  box-shadow: var(--shadow-soft);
  transition: border-color 0.2s, box-shadow 0.2s;
}
.composer__wrap:focus-within {
  border-color: rgba(167,139,250,0.5);
  box-shadow: var(--shadow-soft), 0 0 0 4px rgba(167,139,250,0.12);
}
.composer__tools {
  display: flex; align-items: center; justify-content: space-between;
  padding: 4px 10px; min-height: 22px;
}
.composer__tool {
  display: flex; align-items: center; gap: 5px;
  padding: 5px 12px; border-radius: var(--radius-pill);
  background: var(--surface-3); color: var(--text-2); font-size: 12.5px;
  transition: all 0.15s;
}
.composer__tool:hover { background: var(--border-2); }
.composer__tool[hidden] { display: none; }
.composer__hint { font-size: 11.5px; color: var(--text-4); }

.composer__input-wrap {
  display: flex; align-items: flex-end; gap: 6px;
  padding: 4px 6px 4px 4px;
}
.composer__main { flex: 1; display: flex; flex-direction: column; gap: 6px; min-width: 0; }
.composer__input-wrap.is-dragover { outline: 2px dashed var(--c-violet); outline-offset: -2px; border-radius: var(--radius-xl); }

/* 文件预览区 */
.file-preview { display: flex; flex-wrap: wrap; gap: 6px; padding: 2px 0; }
.file-preview[hidden] { display: none; }
.file-chip {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 5px 8px 5px 6px; border-radius: 9px;
  background: var(--surface-2); border: 1px solid var(--border-2);
  font-size: 12px; color: var(--text-2); max-width: 200px;
  animation: chip-in 0.2s var(--ease);
}
@keyframes chip-in { from { opacity: 0; transform: scale(0.85); } to { opacity: 1; transform: scale(1); } }
.file-chip__icon { font-size: 14px; flex-shrink: 0; }
.file-chip__name { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 120px; }
.file-chip__size { color: var(--text-4); font-size: 10.5px; flex-shrink: 0; }
.file-chip__del {
  width: 18px; height: 18px; border-radius: 50%; display: grid; place-items: center;
  color: var(--text-4); transition: all 0.15s; flex-shrink: 0;
}
.file-chip__del:hover { background: rgba(251,113,133,0.2); color: var(--c-rose); }
.composer__attach {
  width: 38px; height: 38px; border-radius: 12px; flex-shrink: 0;
  display: grid; place-items: center; color: var(--text-3);
  transition: all 0.18s;
}
.composer__attach:hover { background: var(--surface-2); color: var(--c-violet); transform: rotate(90deg); }

.composer__textarea {
  flex: 1; resize: none; padding: 9px 4px; max-height: 200px; min-height: 24px;
  font-size: var(--font-size-base); line-height: 1.5; color: var(--text);
}
.composer__textarea::placeholder { color: var(--text-4); }

.composer__send {
  width: 38px; height: 38px; border-radius: 12px; flex-shrink: 0;
  display: grid; place-items: center;
  background: var(--grad-primary); color: #fff;
  box-shadow: 0 4px 14px -4px rgba(124,58,237,0.5), inset 0 1px 0 rgba(255,255,255,0.15);
  transition: all 0.22s var(--ease);
  transform: scale(1);
}
.composer__send:disabled {
  background: var(--surface-3); color: var(--text-4); box-shadow: none; cursor: not-allowed; transform: scale(0.92);
}
.composer__send:not(:disabled):hover { transform: scale(1.06) rotate(-8deg); box-shadow: 0 8px 20px -4px rgba(124,58,237,0.6); }

.composer__disclaimer {
  text-align: center; font-size: 11px; color: var(--text-4);
  margin-top: 8px;
}

/* 工具开关按钮 */
.composer__tools-left { display: flex; align-items: center; gap: 4px; }
.composer__tool-toggle {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 5px 11px; border-radius: var(--radius-pill);
  background: var(--surface); color: var(--text-3); font-size: 12.5px; font-weight: 500;
  border: 1px solid var(--border);
  transition: all 0.18s var(--ease);
}
.composer__tool-toggle:hover { background: var(--surface-2); color: var(--text); }
.composer__tool-toggle[aria-pressed="true"] {
  background: linear-gradient(135deg, rgba(167,139,250,0.18), rgba(96,165,250,0.12));
  color: var(--c-violet); border-color: rgba(167,139,250,0.35);
  box-shadow: 0 0 0 3px rgba(167,139,250,0.08);
}
.composer__tool-toggle[aria-pressed="true"] svg { transform: rotate(0); }

/* 工具调用过程卡片（消息内折叠） */
.tool-trace {
  margin: 6px 0 12px; border: 1px solid var(--border); border-radius: var(--radius);
  background: var(--surface); overflow: hidden;
}
.tool-trace__head {
  display: flex; align-items: center; gap: 8px;
  padding: 9px 13px; cursor: pointer; user-select: none;
  font-size: 12.5px; color: var(--text-2);
  transition: background 0.15s;
}
.tool-trace__head:hover { background: var(--surface-2); }
.tool-trace__icon { font-size: 14px; }
.tool-trace__title { flex: 1; font-weight: 500; }
.tool-trace__status { font-size: 11px; padding: 2px 8px; border-radius: 999px; font-weight: 600; }
.tool-trace__status.is-running { background: rgba(96,165,250,0.15); color: var(--c-blue); }
.tool-trace__status.is-done { background: rgba(52,211,153,0.15); color: var(--c-emerald); }
.tool-trace__status.is-error { background: rgba(251,113,133,0.15); color: var(--c-rose); }
.tool-trace__chevron { color: var(--text-4); transition: transform 0.2s; }
.tool-trace.is-open .tool-trace__chevron { transform: rotate(90deg); }
.tool-trace__body {
  padding: 0; max-height: 0; overflow: hidden;
  transition: max-height 0.25s var(--ease), padding 0.25s;
  border-top: 0px solid transparent;
}
.tool-trace.is-open .tool-trace__body { max-height: 600px; padding: 12px 13px; border-top: 1px solid var(--border); }
.tool-trace__step {
  padding: 10px 0; border-bottom: 1px dashed var(--border);
  font-size: 12.5px;
}
.tool-trace__step:last-child { border-bottom: none; }
.tool-trace__step-head {
  display: flex; align-items: center; gap: 6px; margin-bottom: 4px;
  font-weight: 600; color: var(--text-2);
}
.tool-trace__args, .tool-trace__result {
  margin: 4px 0 0 18px; padding: 8px 10px; border-radius: 7px;
  background: var(--bg-2); border: 1px solid var(--border);
  font-family: 'JetBrains Mono', monospace; font-size: 11.5px;
  white-space: pre-wrap; word-break: break-all; max-height: 200px; overflow-y: auto;
  color: var(--text-3);
}
.tool-trace__args-label, .tool-trace__result-label {
  display: inline-block; margin: 6px 0 0 18px;
  font-size: 10.5px; font-weight: 600; color: var(--text-4); text-transform: uppercase; letter-spacing: 0.05em;
}
.tool-trace__spinner {
  display: inline-block; width: 11px; height: 11px; border: 2px solid var(--c-blue);
  border-top-color: transparent; border-radius: 50%; animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ---------- 通用按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 10px 18px; border-radius: var(--radius); font-size: 13.5px; font-weight: 600;
  transition: all 0.2s var(--ease); white-space: nowrap;
}
.btn--sm { padding: 7px 12px; font-size: 12.5px; }
.btn--primary {
  background: var(--grad-primary); color: #fff;
  box-shadow: 0 6px 18px -6px rgba(124,58,237,0.5);
}
.btn--primary:hover { transform: translateY(-1px); box-shadow: 0 10px 24px -6px rgba(124,58,237,0.6); }
.btn--ghost { background: var(--surface-2); color: var(--text-2); border: 1px solid var(--border); }
.btn--ghost:hover { background: var(--surface-3); color: var(--text); border-color: var(--border-2); }
.btn--danger { background: rgba(251,113,133,0.12); color: var(--c-rose); border: 1px solid rgba(251,113,133,0.25); }
.btn--danger:hover { background: rgba(251,113,133,0.2); }

/* ---------- 分段控件 ---------- */
.seg { display: inline-flex; gap: 2px; padding: 3px; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); }
.seg__btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 7px 14px; border-radius: 9px; font-size: 13px; color: var(--text-3); font-weight: 500;
  transition: all 0.2s var(--ease);
}
.seg__btn:hover { color: var(--text); }
.seg__btn.is-active {
  background: var(--surface-3); color: var(--text);
  box-shadow: var(--shadow-soft), inset 0 1px 0 rgba(255,255,255,0.06);
}

/* ---------- 开关 ---------- */
.switch { display: inline-flex; align-items: center; gap: 8px; cursor: pointer; font-size: 13px; }
.switch input { display: none; }
.switch__track {
  width: 36px; height: 20px; border-radius: 999px; background: var(--surface-3);
  position: relative; transition: background 0.25s;
}
.switch__thumb {
  position: absolute; top: 2px; left: 2px; width: 16px; height: 16px; border-radius: 50%;
  background: var(--text-3); transition: all 0.25s var(--ease-spring);
}
.switch input:checked + .switch__track { background: var(--grad-violet); }
.switch input:checked + .switch__track .switch__thumb { left: 18px; background: #fff; }

/* ---------- 弹窗 ---------- */
.modal { position: fixed; inset: 0; z-index: 100; padding: 20px; }
.modal[hidden] { display: none !important; }
.modal__overlay {
  position: absolute; inset: 0;
  background: rgba(0,0,0,0.55); backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
  animation: fade 0.25s var(--ease);
}
@keyframes fade { from { opacity: 0; } to { opacity: 1; } }

.modal__panel {
  position: relative; width: 100%; max-width: 560px; max-height: 88vh;
  background: var(--glass); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(8px);
  border: 1px solid var(--border-2); border-radius: var(--radius-xl);
  box-shadow: var(--shadow); overflow: hidden;
  display: flex; flex-direction: column;
  margin: auto; /* 配合 .modal 的 place-items 让面板居中 */
  animation: modal-in 0.4s var(--ease-spring);
}
.modal__panel--wide { max-width: 980px; }
@keyframes modal-in { from { opacity: 0; transform: scale(0.94) translateY(20px); } to { opacity: 1; transform: scale(1) translateY(0); } }

.modal__head {
  display: flex; align-items: flex-start; justify-content: space-between; gap: 16px;
  padding: 22px 24px 18px; border-bottom: 1px solid var(--border);
}
.modal__title { font-size: 19px; font-weight: 700; letter-spacing: -0.01em; }
.modal__subtitle { font-size: 13px; color: var(--text-3); margin-top: 3px; }
.modal__body { overflow-y: auto; padding: 22px 24px; }
/* API 面板需要占满高度，覆盖默认 padding */
.modal__body.api-panel { padding: 0; display: flex; flex: 1; min-height: 0; overflow: hidden; }

/* ---------- API 管理面板 ---------- */
.api-panel {
  display: grid; grid-template-columns: 320px 1fr;
  gap: 0; width: 100%; flex: 1; min-height: 0;
}
.api-panel__list {
  border-right: 1px solid var(--border); padding: 16px; overflow-y: auto;
  display: flex; flex-direction: column; gap: 8px; min-height: 0;
}
.api-panel__list-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 8px; font-size: 12px; color: var(--text-4); font-weight: 600; text-transform: uppercase; letter-spacing: 0.05em; }

.api-card {
  display: flex; align-items: center; gap: 11px; padding: 12px;
  border-radius: var(--radius); border: 1px solid var(--border); background: var(--surface);
  cursor: pointer; transition: all 0.2s var(--ease);
  position: relative; overflow: hidden;
}
.api-card::before {
  content: ''; position: absolute; left: 0; top: 0; bottom: 0; width: 3px;
  background: transparent; transition: background 0.2s;
}
.api-card:hover { background: var(--surface-2); border-color: var(--border-2); transform: translateX(3px); }
.api-card.is-active {
  background: linear-gradient(135deg, rgba(167,139,250,0.14), rgba(96,165,250,0.06));
  border-color: rgba(167,139,250,0.4);
}
.api-card.is-active::before { background: var(--grad-primary); }
.api-card__logo {
  width: 40px; height: 40px; border-radius: 11px; flex-shrink: 0;
  display: grid; place-items: center; font-size: 18px; font-weight: 700;
  background: var(--ac, var(--grad-violet)); color: #fff;
  box-shadow: 0 4px 12px -3px rgba(0,0,0,0.3);
}
.api-card__body { flex: 1; min-width: 0; }
.api-card__name { font-size: 14px; font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; display: flex; align-items: center; gap: 6px; }
.api-card__badge {
  font-size: 9.5px; padding: 1px 6px; border-radius: 999px; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.04em; flex-shrink: 0;
}
.api-card__badge--builtin { background: rgba(167,139,250,0.2); color: var(--c-violet); }
.api-card__badge--active { background: rgba(52,211,153,0.2); color: var(--c-emerald); }
.api-card__model { font-size: 11.5px; color: var(--text-4); font-family: 'JetBrains Mono', monospace; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; margin-top: 1px; }
.api-card__dot { width: 7px; height: 7px; border-radius: 50%; background: var(--c-emerald); flex-shrink: 0; box-shadow: 0 0 8px rgba(52,211,153,0.5); }
.api-card__dot.is-off { background: var(--text-4); box-shadow: none; }

/* API 分组 */
.api-group { user-select: none; }
.api-group__header {
  display: flex; align-items: center; gap: 8px;
  padding: 8px 10px; cursor: pointer;
  font-size: 11px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.04em;
  color: var(--text-3); border-radius: var(--radius);
  transition: background 0.15s;
}
.api-group__header:hover { background: var(--surface-2); }
.api-group__emoji { font-size: 14px; }
.api-group__count {
  font-size: 10px; padding: 1px 6px; border-radius: 999px;
  background: rgba(255,255,255,0.06); color: var(--text-4); font-weight: 500;
  text-transform: none; letter-spacing: 0;
}
.api-group__arrow {
  margin-left: auto; transition: transform 0.2s var(--ease);
  color: var(--text-4);
}
.api-group.is-collapsed .api-group__arrow { transform: rotate(-90deg); }
.api-group.is-collapsed .api-group__items { display: none; }
.api-group__items { padding: 0 0 4px; display: flex; flex-direction: column; gap: 4px; }

.api-panel__form {
  padding: 22px; overflow-y: auto; min-height: 0;
  display: flex; flex-direction: column;
}
/* 空状态：撑满高度居中 */
.api-panel__empty {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 12px; flex: 1; min-height: 100%;
  color: var(--text-4); text-align: center;
}
/* 表单：撑满 */
.api-form { display: flex; flex-direction: column; gap: 16px; flex: 1; }
.api-form__group { display: flex; flex-direction: column; gap: 6px; }
.api-form__group label { font-size: 12.5px; font-weight: 600; color: var(--text-2); }
.api-form__row { display: grid; grid-template-columns: 1.4fr 1fr; gap: 14px; }
.api-form input[type="text"], .api-form input[type="password"], .api-form input[type="number"] {
  padding: 10px 13px; border-radius: var(--radius-sm); background: var(--surface); border: 1px solid var(--border);
  font-size: 13.5px; transition: all 0.2s var(--ease);
}
.api-form input:focus { border-color: var(--c-violet); background: var(--surface-2); box-shadow: 0 0 0 3px rgba(167,139,250,0.12); }
.input-pwd { position: relative; }
.input-pwd input { width: 100%; padding-right: 38px; }
.input-pwd__toggle { position: absolute; right: 6px; top: 50%; transform: translateY(-50%); width: 30px; height: 30px; display: grid; place-items: center; border-radius: 7px; color: var(--text-4); transition: all 0.15s; }
.input-pwd__toggle:hover { color: var(--text); background: var(--surface-2); }
.api-key--readonly {
  background: var(--surface-2) !important; color: var(--text-4) !important;
  cursor: not-allowed; letter-spacing: 0.15em;
}

.model-input { display: flex; gap: 8px; }
.model-input input { flex: 1; }

.preset-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(100px, 1fr)); gap: 8px; }
.preset-card {
  padding: 10px; border-radius: var(--radius-sm); border: 1px solid var(--border); background: var(--surface);
  display: flex; flex-direction: column; align-items: center; gap: 6px; transition: all 0.18s var(--ease);
  text-align: center;
}
.preset-card:hover { background: var(--surface-2); border-color: var(--border-2); transform: translateY(-2px); }
.preset-card__logo { width: 30px; height: 30px; border-radius: 8px; display: grid; place-items: center; font-size: 16px; font-weight: 700; color: #fff; }
.preset-card__name { font-size: 11px; font-weight: 600; }

.api-advanced { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.api-advanced__item { display: flex; align-items: center; justify-content: space-between; gap: 8px; padding: 10px 12px; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-sm); }
.api-advanced__item > span { font-size: 12.5px; color: var(--text-2); }
.api-advanced__item input[type="number"] { width: 70px; padding: 5px 8px; border-radius: 6px; background: var(--surface-2); border: 1px solid var(--border); font-size: 12.5px; }
.api-advanced__item--wide { grid-column: 1 / -1; }

/* --- 批量模型选择面板 --- */
.batch-models {
  border: 1px solid var(--border); border-radius: var(--radius);
  background: var(--surface-2); margin-top: 8px;
}
.batch-models__header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 8px 12px; border-bottom: 1px solid var(--border);
  font-size: 12.5px; color: var(--text-3);
}
.batch-models__header strong { color: var(--c-violet); }
.batch-models__actions { display: flex; gap: 4px; }
.batch-models__list {
  max-height: 200px; overflow-y: auto; padding: 4px 0;
}
.batch-models__list::-webkit-scrollbar { width: 4px; }
.batch-models__list::-webkit-scrollbar-thumb { background: var(--text-4); border-radius: 2px; }
.batch-model-item {
  display: flex; align-items: center; gap: 8px;
  padding: 6px 12px; font-size: 13px; color: var(--text-2);
  cursor: pointer; transition: background 0.12s;
}
.batch-model-item:hover { background: rgba(167,139,250,0.06); }
.batch-model-item input[type="checkbox"] {
  accent-color: var(--c-violet); flex-shrink: 0;
}
.batch-model-item__name { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.batch-model-item__exists {
  font-size: 10px; padding: 1px 5px; border-radius: 4px;
  background: rgba(52,211,153,0.12); color: var(--c-emerald);
  flex-shrink: 0;
}
.batch-models__footer {
  padding: 8px 12px; border-top: 1px solid var(--border);
  display: flex; justify-content: flex-end;
}

.btn--xs {
  padding: 2px 8px; font-size: 11px; border-radius: 6px;
}

.api-form__actions { display: flex; align-items: center; justify-content: space-between; gap: 8px; padding-top: 8px; border-top: 1px solid var(--border); }
.api-form__actions > div { display: flex; gap: 8px; }
.api-form__status { font-size: 12.5px; padding: 8px 12px; border-radius: 8px; }
.api-form__status.is-ok { background: rgba(52,211,153,0.12); color: var(--c-emerald); }
.api-form__status.is-err { background: rgba(251,113,133,0.12); color: var(--c-rose); }
.api-form__status:empty { display: none; }

/* ---------- 设置 ---------- */
.settings { display: flex; flex-direction: column; gap: 22px; }
.settings__group { display: flex; flex-direction: column; gap: 8px; }
.settings__label { font-size: 13px; font-weight: 600; color: var(--text-2); }
.settings__hint { font-size: 12px; color: var(--text-4); }
.settings__row { display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.settings__textarea { width: 100%; padding: 11px 14px; border-radius: var(--radius); background: var(--surface); border: 1px solid var(--border); font-size: 13.5px; resize: vertical; min-height: 80px; font-family: inherit; }
.settings__textarea:focus { border-color: var(--c-violet); }
.settings__num { width: 100px; padding: 8px 12px; border-radius: var(--radius-sm); background: var(--surface); border: 1px solid var(--border); font-size: 13.5px; }
.settings__num:focus { border-color: var(--c-violet); }

/* 代理状态指示器 */
.proxy-status {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 8px 14px; border-radius: var(--radius-pill);
  background: var(--surface); border: 1px solid var(--border);
  font-size: 12.5px; color: var(--text-3);
}
.proxy-status__dot { width: 8px; height: 8px; border-radius: 50%; background: var(--text-4); flex-shrink: 0; }
.proxy-status.is-ok { color: var(--c-emerald); border-color: rgba(52,211,153,0.3); }
.proxy-status.is-ok .proxy-status__dot { background: var(--c-emerald); box-shadow: 0 0 5px rgba(52,211,153,0.5); }
.proxy-status.is-err { color: var(--c-amber); border-color: rgba(251,191,36,0.3); }
.proxy-status.is-err .proxy-status__dot { background: var(--c-amber); }
.proxy-status.is-off { color: var(--text-4); }
@keyframes pulse-dot { 0%,100% { box-shadow: 0 0 0 0 rgba(52,211,153,0.5); } 50% { box-shadow: 0 0 0 5px rgba(52,211,153,0); } }

.range { -webkit-appearance: none; appearance: none; width: 200px; height: 6px; border-radius: 999px; background: var(--surface-3); outline: none; }
.range::-webkit-slider-thumb { -webkit-appearance: none; appearance: none; width: 18px; height: 18px; border-radius: 50%; background: var(--grad-violet); cursor: pointer; box-shadow: 0 2px 8px rgba(124,58,237,0.5); transition: transform 0.15s; }
.range::-webkit-slider-thumb:hover { transform: scale(1.15); }
.range::-moz-range-thumb { width: 18px; height: 18px; border: none; border-radius: 50%; background: var(--c-violet-d); cursor: pointer; }
.range__val { font-size: 13px; font-weight: 600; color: var(--text-2); width: 30px; font-family: 'JetBrains Mono', monospace; }

/* Token 用量徽章 */
.usage-badge {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 6px 12px; border-radius: var(--radius-pill);
  background: var(--surface); border: 1px solid var(--border);
  font-size: 12px; color: var(--text-3); font-weight: 500;
  font-variant-numeric: tabular-nums;
}
.usage-badge[hidden] { display: none; }
.usage-badge svg { color: var(--c-amber); }
.usage-badge__sep { color: var(--text-4); }
.usage-badge #usageCost { color: var(--c-emerald); font-weight: 600; }

/* 用量明细（设置面板） */
.usage-detail { display: flex; flex-direction: column; gap: 6px; }
.usage-detail__summary {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin-bottom: 8px;
}
.usage-detail__card {
  padding: 12px; border-radius: var(--radius-sm); background: var(--surface);
  border: 1px solid var(--border); text-align: center;
}
.usage-detail__card-val { font-size: 18px; font-weight: 700; font-variant-numeric: tabular-nums; }
.usage-detail__card-label { font-size: 11px; color: var(--text-4); margin-top: 2px; }
.usage-detail__row {
  display: flex; align-items: center; justify-content: space-between;
  padding: 8px 12px; border-radius: var(--radius-sm); background: var(--surface);
  font-size: 12.5px; font-variant-numeric: tabular-nums;
}
.usage-detail__row-name { font-weight: 600; color: var(--text-2); }
.usage-detail__row-stats { color: var(--text-3); }
.usage-detail__row-cost { color: var(--c-emerald); font-weight: 600; margin-left: 8px; }
.usage-detail__empty { padding: 16px; text-align: center; color: var(--text-4); font-size: 12.5px; }

/* 自定义 skill 列表 */
.skill-list { display: flex; flex-direction: column; gap: 8px; }

/* 渐进式表单：核心 + 参数行 + 高级折叠 */
.skill-form__row { display: flex; gap: 12px; align-items: flex-start; }
.skill-form__row .settings__group { margin-bottom: 14px; }

.skill-params { display: flex; flex-direction: column; gap: 8px; }
.skill-params:empty + .skill-params-empty { display: block; }
.skill-params:not(:empty) + .skill-params-empty { display: none; }
.skill-params-empty {
  padding: 14px; text-align: center; color: var(--text-4); font-size: 12.5px;
  border: 1px dashed var(--border); border-radius: var(--radius-sm);
}

.skill-param-row {
  display: grid; grid-template-columns: 1.4fr 0.8fr 2fr auto; gap: 8px; align-items: center;
  padding: 8px; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-sm);
}
.skill-param-row input {
  padding: 6px 9px; border-radius: 6px; background: var(--surface-2);
  border: 1px solid var(--border); font-size: 12.5px; width: 100%;
}
.skill-param-row input:focus { border-color: var(--c-violet); }
.skill-param-row select {
  padding: 6px 9px; border-radius: 6px; background: var(--surface-2);
  border: 1px solid var(--border); font-size: 12.5px; cursor: pointer;
}
.skill-param-row__del {
  width: 28px; height: 28px; border-radius: 6px; display: grid; place-items: center;
  color: var(--text-4); transition: all 0.15s;
}
.skill-param-row__del:hover { color: var(--c-rose); background: var(--surface-3); }
.skill-param-row__required {
  display: inline-flex; align-items: center; gap: 4px; font-size: 11px; color: var(--text-3);
  cursor: pointer; white-space: nowrap;
}
.skill-param-row__required input { width: auto; }

/* 高级配置折叠 */
.skill-advanced {
  margin-top: 6px; border: 1px solid var(--border); border-radius: var(--radius);
  background: var(--surface); overflow: hidden;
}
.skill-advanced summary {
  display: flex; align-items: center; gap: 6px; cursor: pointer; user-select: none;
  padding: 10px 14px; font-size: 13px; font-weight: 600; color: var(--text-2);
  list-style: none;
}
.skill-advanced summary::-webkit-details-marker { display: none; }
.skill-advanced summary svg { transition: transform 0.2s; }
.skill-advanced[open] summary svg { transform: rotate(180deg); }
.skill-advanced__body { padding: 0 14px 14px; display: flex; flex-direction: column; gap: 14px; }

.skill-item {
  display: flex; align-items: center; gap: 11px;
  padding: 11px 13px; border-radius: var(--radius);
  border: 1px solid var(--border); background: var(--surface);
  transition: all 0.18s var(--ease);
}
.skill-item:hover { background: var(--surface-2); border-color: var(--border-2); }
.skill-item__icon { font-size: 20px; width: 28px; text-align: center; flex-shrink: 0; }
.skill-item__body { flex: 1; min-width: 0; }
.skill-item__name { font-size: 13.5px; font-weight: 600; }
.skill-item__desc { font-size: 11.5px; color: var(--text-4); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.skill-item__actions { display: flex; align-items: center; gap: 4px; flex-shrink: 0; }
.skill-item__btn {
  width: 28px; height: 28px; border-radius: 7px; display: grid; place-items: center;
  color: var(--text-4); transition: all 0.15s;
}
.skill-item__btn:hover { background: var(--surface-3); color: var(--text); }
.skill-item__btn.is-danger:hover { color: var(--c-rose); }
.skill-empty { padding: 20px; text-align: center; color: var(--text-4); font-size: 12.5px; }

/* ---------- 选中文本浮动工具栏 ---------- */
.select-toolbar {
  position: fixed; z-index: 150;
  display: flex; align-items: center; gap: 3px;
  padding: 5px;
  background: rgba(20, 20, 32, 0.78);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 13px;
  box-shadow: 0 12px 40px -8px rgba(0,0,0,0.55), 0 0 0 1px rgba(255,255,255,0.05) inset;
  animation: select-pop 0.24s var(--ease-spring);
  pointer-events: auto;
}
[data-theme="light"] .select-toolbar { background: rgba(255,255,255,0.85); border-color: rgba(0,0,0,0.1); }
.select-toolbar[hidden] { display: none; }
@keyframes select-pop {
  from { opacity: 0; transform: translateY(10px) scale(0.88); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}
/* 底部指示三角 */
.select-toolbar::after {
  content: ''; position: absolute; top: 100%; left: 50%; transform: translateX(-50%);
  width: 0; height: 0;
  border-left: 8px solid transparent; border-right: 8px solid transparent;
  border-top: 8px solid rgba(20,20,32,0.78);
  margin-top: 1px;
  filter: drop-shadow(0 1px 1px rgba(0,0,0,0.2));
}
[data-theme="light"] .select-toolbar::after { border-top-color: rgba(255,255,255,0.85); }

.select-toolbar__btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 7px 13px; border-radius: 9px;
  font-size: 13px; font-weight: 600; color: var(--text-2);
  transition: all 0.18s var(--ease);
  white-space: nowrap; position: relative;
}
.select-toolbar__btn svg { flex-shrink: 0; transition: transform 0.18s var(--ease); }
.select-toolbar__btn:hover { transform: translateY(-1px); }
.select-toolbar__btn:hover svg { transform: scale(1.12); }

/* 引用按钮 - 蓝色 */
.select-toolbar__btn[data-act="quote"]:hover {
  background: linear-gradient(135deg, rgba(96,165,250,0.2), rgba(37,99,235,0.15));
  color: #60a5fa;
  box-shadow: 0 4px 14px -4px rgba(37,99,235,0.4);
}
/* 回答按钮 - 绿色 */
.select-toolbar__btn[data-act="reply"]:hover {
  background: linear-gradient(135deg, rgba(52,211,153,0.2), rgba(5,150,105,0.15));
  color: #34d399;
  box-shadow: 0 4px 14px -4px rgba(5,150,105,0.4);
}
/* 复制按钮 - 灰色 */
.select-toolbar__btn[data-act="copy"]:hover {
  background: var(--surface-3); color: var(--text);
}

/* 按钮之间的分隔线（复制按钮前） */
.select-toolbar__btn[data-act="copy"]::before {
  content: ''; position: absolute; left: -2px; top: 25%; bottom: 25%; width: 1px;
  background: var(--border-2);
}

/* ---------- Toast ---------- */
.toast-wrap { position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%); z-index: 200; display: flex; flex-direction: column; gap: 8px; align-items: center; pointer-events: none; }
.toast {
  display: flex; align-items: center; gap: 10px; padding: 11px 18px; border-radius: var(--radius-pill);
  background: var(--glass); backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
  border: 1px solid var(--border-2); box-shadow: var(--shadow);
  font-size: 13.5px; font-weight: 500; color: var(--text);
  animation: toast-in 0.4s var(--ease-spring);
  pointer-events: auto;
}
.toast.is-out { animation: toast-out 0.3s var(--ease) forwards; }
.toast__icon { display: grid; place-items: center; }
.toast--success .toast__icon { color: var(--c-emerald); }
.toast--error .toast__icon { color: var(--c-rose); }
.toast--info .toast__icon { color: var(--c-blue); }
@keyframes toast-in { from { opacity: 0; transform: translateY(20px) scale(0.9); } to { opacity: 1; transform: translateY(0) scale(1); } }
@keyframes toast-out { to { opacity: 0; transform: translateY(20px) scale(0.9); } }

/* ---------- 响应式 ---------- */
@media (max-width: 900px) {
  .app { grid-template-columns: 1fr; }
  .sidebar {
    position: fixed; top: 0; left: 0; bottom: 0; width: 280px; z-index: 50;
    transform: translateX(-100%);
  }
  .app:not(.is-collapsed) .sidebar { transform: translateX(0); box-shadow: var(--shadow); }
  .app:not(.is-collapsed) .main::before {
    content: ''; position: absolute; inset: 0; background: rgba(0,0,0,0.4); z-index: 40; backdrop-filter: blur(8px);
  }
  .menu-btn { display: grid !important; }
  .api-panel { grid-template-columns: 1fr; }
  .api-panel__list { max-height: 200px; border-right: none; border-bottom: 1px solid var(--border); }
  .api-form__row { grid-template-columns: 1fr; }
  .api-advanced { grid-template-columns: 1fr; }
}

/* ---------- Onboarding 使用说明弹窗 ---------- */
.modal__panel--onboarding {
  max-width: 520px;
  background: var(--glass);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border: 1px solid var(--border-2);
  box-shadow: var(--shadow), 0 0 80px -20px rgba(167,139,250,0.25);
  animation: onboarding-in 0.5s var(--ease-spring) both;
}
@keyframes onboarding-in {
  from { opacity: 0; transform: scale(0.92) translateY(30px); }
  to { opacity: 1; transform: scale(1) translateY(0); }
}

.onboarding {
  padding: 32px 28px 24px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

/* Hero 区域 */
.onboarding__hero {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}
.onboarding__logo-wrap {
  display: grid;
  place-items: center;
  width: 80px;
  height: 80px;
  border-radius: 24px;
  background: linear-gradient(135deg, rgba(167,139,250,0.15), rgba(96,165,250,0.1), rgba(34,211,238,0.08));
  border: 1px solid rgba(167,139,250,0.2);
  box-shadow: 0 8px 32px -8px rgba(167,139,250,0.35), inset 0 1px 0 rgba(255,255,255,0.1);
  animation: logo-float 3s ease-in-out infinite;
  filter: drop-shadow(0 4px 20px rgba(167,139,250,0.5));
}
@keyframes logo-float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}
.onboarding__hero h2 {
  font-size: 22px;
  font-weight: 800;
  letter-spacing: -0.02em;
  background: var(--grad-primary);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  background-size: 200% 200%;
  animation: grad-move 4s ease infinite;
}
.onboarding__hero-sub {
  color: var(--text-3);
  font-size: 13.5px;
  line-height: 1.5;
}

/* 步骤列表 */
.onboarding__steps {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.onboarding__step {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px 14px;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--border);
  transition: all 0.22s var(--ease);
  position: relative;
  overflow: hidden;
}
.onboarding__step::before {
  content: '';
  position: absolute;
  inset: 0;
  opacity: 0;
  background: radial-gradient(circle at 0% 50%, rgba(167,139,250,0.06), transparent 70%);
  transition: opacity 0.3s;
}
.onboarding__step:hover {
  border-color: var(--border-2);
  transform: translateX(4px);
  box-shadow: var(--shadow-soft);
}
.onboarding__step:hover::before { opacity: 1; }

.onboarding__step-num {
  position: absolute;
  top: 8px;
  right: 10px;
  font-size: 10px;
  font-weight: 700;
  color: var(--text-4);
  font-family: 'JetBrains Mono', monospace;
  opacity: 0.5;
}

.onboarding__step-icon {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 13px;
  background: linear-gradient(135deg, var(--oc1), var(--oc2));
  color: #fff;
  flex-shrink: 0;
  box-shadow: 0 4px 16px -4px var(--oc1);
  position: relative;
  z-index: 1;
}

.onboarding__step-body {
  display: flex;
  flex-direction: column;
  gap: 3px;
  min-width: 0;
  position: relative;
  z-index: 1;
}
.onboarding__step-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
}
.onboarding__step-desc {
  font-size: 12.5px;
  color: var(--text-3);
  line-height: 1.45;
}

/* 快捷键提示区 */
.onboarding__shortcuts {
  padding: 14px 16px;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--border);
  border-top: none;
  border-radius: 0 0 var(--radius) var(--radius);
}
.onboarding__shortcuts-title {
  font-size: 11px;
  font-weight: 700;
  color: var(--text-4);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 10px;
}
.onboarding__shortcuts-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}
.onboarding__shortcut {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 12.5px;
  color: var(--text-3);
}
.onboarding__shortcut kbd {
  display: inline-flex;
  align-items: center;
  padding: 3px 7px;
  border-radius: 6px;
  background: var(--surface-2);
  border: 1px solid var(--border-2);
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  font-weight: 600;
  color: var(--text-2);
  white-space: nowrap;
  box-shadow: 0 1px 2px rgba(0,0,0,0.15);
}

/* Footer */
.onboarding__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}

.onboarding__check {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  font-size: 13px;
  color: var(--text-3);
  user-select: none;
  transition: color 0.15s;
}
.onboarding__check:hover { color: var(--text-2); }
.onboarding__check input { display: none; }
.onboarding__check-box {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  border-radius: 6px;
  background: var(--surface-2);
  border: 1.5px solid var(--border-2);
  transition: all 0.2s var(--ease-spring);
  flex-shrink: 0;
}
.onboarding__check-box::after {
  content: '';
  width: 10px;
  height: 10px;
  border-radius: 3px;
  background: var(--grad-violet);
  opacity: 0;
  transform: scale(0.5);
  transition: all 0.2s var(--ease-spring);
}
.onboarding__check input:checked + .onboarding__check-box {
  border-color: var(--c-violet);
  background: rgba(167,139,250,0.15);
}
.onboarding__check input:checked + .onboarding__check-box::after {
  opacity: 1;
  transform: scale(1);
}

.btn--lg {
  padding: 12px 24px;
  font-size: 14.5px;
  border-radius: var(--radius);
}

/* 响应式 */
@media (max-width: 560px) {
  .modal__panel--onboarding { max-width: 100%; margin: 10px; }
  .onboarding { padding: 24px 18px 18px; gap: 18px; }
  .onboarding__shortcuts-grid { grid-template-columns: 1fr; }
  .onboarding__step { padding: 10px 12px; }
  .onboarding__step-icon { width: 36px; height: 36px; border-radius: 10px; }
  .onboarding__step-icon svg { width: 16px; height: 16px; }
}