:root {
  --white: #ffffff;
  --blue: #1d4ed8;
  --blue-dark: #1e40af;
  --blue-light: #eaf0ff;
  --red: #dc2626;
  --red-light: #fee2e2;
  --black: #111827;
  --gray: #6b7280;
  --gray-bg: #f5f7fa;
  --border: #e5e7eb;
}

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

body {
  font-family: "Segoe UI", "Microsoft YaHei", sans-serif;
  color: var(--black);
  background: var(--gray-bg);
  font-size: 14px;
}

.hidden { display: none !important; }

/* ---------- 登录/注册 ---------- */
.login-overlay {
  position: fixed; inset: 0;
  background: linear-gradient(135deg, #0f172a 0%, #1e40af 60%, #1d4ed8 100%);
  display: flex; align-items: center; justify-content: center; z-index: 100;
}
.login-card { background: var(--white); border-radius: 12px; padding: 36px 34px; width: 340px; box-shadow: 0 20px 60px rgba(0,0,0,.35); }
.login-logo { font-size: 22px; font-weight: 700; color: var(--black); text-align: center; }
.auth-tabs { display: flex; gap: 8px; margin: 16px 0; background: var(--gray-bg); padding: 4px; border-radius: 8px; }
.auth-tab { flex: 1; text-align: center; padding: 8px; border-radius: 6px; cursor: pointer; color: var(--gray); font-weight: 500; }
.auth-tab.active { background: var(--white); color: var(--blue); font-weight: 600; box-shadow: 0 1px 4px rgba(0,0,0,.1); }
.login-card input {
  width: 100%; padding: 12px; border: 1px solid var(--border); border-radius: 8px;
  font-size: 14px; outline: none; margin-top: 10px;
}
.login-card input:focus { border-color: var(--blue); box-shadow: 0 0 0 3px var(--blue-light); }
.login-err { color: var(--red); font-size: 12px; min-height: 18px; margin-top: 8px; }

/* ---------- 布局 ---------- */
.app { display: grid; grid-template-columns: 200px 1fr; grid-template-rows: 60px 1fr; height: 100vh; }
.header { grid-column: 1 / 3; background: var(--white); border-bottom: 1px solid var(--border); display: flex; align-items: center; justify-content: space-between; padding: 0 24px; }
.brand { font-size: 18px; font-weight: 700; display: flex; align-items: center; gap: 8px; }
.brand-dot { width: 12px; height: 12px; background: var(--red); border-radius: 50%; box-shadow: 0 0 0 3px var(--red-light); }
.header-actions { display: flex; gap: 10px; align-items: center; }
.header-user { color: var(--gray); font-size: 13px; margin: 0 4px; }

.sidebar { background: var(--white); border-right: 1px solid var(--border); padding: 16px 10px; }
.nav-item { display: flex; align-items: center; gap: 10px; padding: 11px 14px; border-radius: 8px; cursor: pointer; color: var(--gray); font-weight: 500; margin-bottom: 4px; user-select: none; }
.nav-item:hover { background: var(--gray-bg); color: var(--black); }
.nav-item.active { background: var(--blue-light); color: var(--blue); font-weight: 600; }
.nav-ico { font-size: 16px; }

.main { padding: 24px; overflow: auto; }
.tab { display: none; }
.tab.active { display: block; }

/* ---------- 通用 ---------- */
.panel-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 16px; }
.panel-head h2 { font-size: 20px; }
.panel-tools { display: flex; gap: 10px; }

.btn { padding: 9px 16px; border: none; border-radius: 8px; cursor: pointer; font-size: 14px; font-weight: 500; transition: .15s; white-space: nowrap; text-decoration: none; display: inline-block; }
.btn-primary { background: var(--blue); color: #fff; }
.btn-primary:hover { background: var(--blue-dark); }
.btn-ghost { background: var(--gray-bg); color: var(--black); }
.btn-ghost:hover { background: #e5e9f0; }
.btn-outline { background: transparent; color: var(--gray); border: 1px solid var(--border); }
.btn-outline:hover { color: var(--red); border-color: var(--red); }
.btn-danger { background: var(--red-light); color: var(--red); }
.btn-danger:hover { background: var(--red); color: #fff; }
.btn-block { width: 100%; }
.btn-sm { padding: 5px 10px; font-size: 12px; }

/* 子标签 */
.sub-tabs { display: flex; gap: 8px; margin-bottom: 14px; border-bottom: 1px solid var(--border); }
.sub-tab { padding: 8px 16px; cursor: pointer; color: var(--gray); font-weight: 500; border-bottom: 2px solid transparent; }
.sub-tab.active { color: var(--blue); border-bottom-color: var(--blue); font-weight: 600; }

/* 分段控件（PandaAI 风格） */
.segmented { display: inline-flex; background: var(--gray-bg); padding: 4px; border-radius: 10px; gap: 4px; }
.segmented span { padding: 7px 20px; border-radius: 8px; cursor: pointer; color: var(--gray); font-weight: 500; font-size: 13px; user-select: none; }
.segmented span.active { background: var(--white); color: var(--blue); font-weight: 600; box-shadow: 0 1px 4px rgba(0,0,0,.1); }

/* 策略卡片 sparkline */
.sparkline { width: 100%; height: 52px; display: block; margin: 10px 0 4px; }
.strategy-metrics { display: flex; gap: 16px; flex-wrap: wrap; font-size: 12px; color: var(--gray); margin-bottom: 10px; }
.strategy-metrics b { font-size: 14px; font-weight: 700; }
.up { color: var(--red); }
.down { color: #16a34a; }
.strategy-foot { display: flex; gap: 8px; flex-wrap: wrap; }

/* 标签 */
.tag-input { padding: 8px 12px; border: 1px solid var(--border); border-radius: 8px; font-size: 13px; outline: none; width: 160px; }
.tag-input:focus { border-color: var(--blue); box-shadow: 0 0 0 3px var(--blue-light); }
.tag-bar { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 14px; }
.tag-chip { display: inline-block; padding: 4px 12px; border-radius: 20px; font-size: 12px; cursor: pointer; background: var(--gray-bg); color: var(--gray); border: 1px solid transparent; user-select: none; }
.tag-chip:hover { border-color: var(--blue); color: var(--blue); }
.tag-chip.active { background: var(--blue); color: #fff; }
.tag-mini { display: inline-block; background: var(--blue-light); color: var(--blue); border-radius: 20px; padding: 2px 8px; font-size: 11px; margin: 2px 4px 2px 0; }

/* ---------- 工作台 ---------- */
.dash-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 16px; }
.dash-card { background: var(--white); border: 1px solid var(--border); border-radius: 12px; padding: 20px; }
.dash-title { font-size: 13px; color: var(--gray); margin-bottom: 10px; }
.dash-num { font-size: 32px; font-weight: 700; color: var(--blue); }
.dash-desc { color: var(--gray); font-size: 13px; margin-bottom: 14px; line-height: 1.6; }
.dash-tip { margin-top: 18px; background: var(--blue-light); color: var(--blue); border-radius: 10px; padding: 14px 18px; line-height: 1.7; }

/* ---------- 知识库 ---------- */
.file-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 14px; }
.file-card { background: var(--white); border: 1px solid var(--border); border-radius: 10px; padding: 16px; cursor: pointer; transition: .15s; }
.file-card:hover { border-color: var(--blue); box-shadow: 0 4px 14px rgba(29,78,216,.12); }
.file-icon { font-size: 30px; }
.file-name { font-weight: 600; margin: 10px 0 4px; word-break: break-all; }
.file-meta { color: var(--gray); font-size: 12px; }
.file-actions { margin-top: 10px; display: flex; gap: 6px; flex-wrap: wrap; }
.pub-badge { display: inline-block; background: #dcfce7; color: #16a34a; border-radius: 20px; padding: 2px 8px; font-size: 11px; margin-left: 6px; }

.empty { color: var(--gray); text-align: center; padding: 60px 0; grid-column: 1/-1; }

/* ---------- 程序 ---------- */
.copilot-layout { display: grid; grid-template-columns: 220px 1fr 380px; gap: 12px; height: calc(100vh - 190px); }
.copilot-chat { margin-top: 0; height: 100%; }
.chat-actions { display: flex; gap: 6px; padding: 6px 12px; border-top: 1px solid var(--border); }
.program-list { background: var(--white); border: 1px solid var(--border); border-radius: 10px; overflow: auto; padding: 8px; }
.p-item { padding: 10px 12px; border-radius: 8px; cursor: pointer; word-break: break-all; }
.p-item:hover { background: var(--gray-bg); }
.p-item.active { background: var(--blue-light); color: var(--blue); font-weight: 600; }
.program-editor { display: flex; flex-direction: column; gap: 10px; min-width: 0; }
.editor-bar { display: flex; gap: 8px; align-items: center; }
.editor-name { flex: 1; padding: 9px 12px; border: 1px solid var(--border); border-radius: 8px; font-size: 14px; outline: none; }
#p-code { flex: 1; width: 100%; border: 1px solid var(--border); border-radius: 10px; padding: 14px; font-family: Consolas, "Courier New", monospace; font-size: 13px; line-height: 1.5; resize: none; outline: none; }
#p-code:focus { border-color: var(--blue); }

.result { background: var(--white); border: 1px solid var(--border); border-radius: 10px; overflow: hidden; height: 240px; display: flex; flex-direction: column; }
.result-tabs { display: flex; align-items: center; gap: 4px; padding: 6px 10px; border-bottom: 1px solid var(--border); }
.result-tab { padding: 6px 14px; border-radius: 6px; cursor: pointer; color: var(--gray); font-size: 13px; }
.result-tab.active { background: var(--blue-light); color: var(--blue); font-weight: 600; }
.result-meta { margin-left: auto; color: var(--gray); font-size: 12px; }
.result-body { flex: 1; overflow: auto; padding: 12px; }
#r-output { font-family: Consolas, monospace; font-size: 12px; white-space: pre-wrap; word-break: break-all; }
#r-output.err { color: var(--red); }
#r-images img { max-width: 100%; border: 1px solid var(--border); border-radius: 8px; margin-bottom: 12px; }

/* ---------- 回测 ---------- */
.bt-form { display: flex; flex-wrap: wrap; gap: 14px; background: var(--white); border: 1px solid var(--border); border-radius: 10px; padding: 16px; }
.bt-form label { font-size: 13px; color: var(--gray); font-weight: 600; display: flex; flex-direction: column; gap: 6px; }
.bt-form input, .bt-form select { padding: 9px 12px; border: 1px solid var(--border); border-radius: 8px; font-size: 14px; outline: none; min-width: 130px; }
.bt-form input:focus, .bt-form select:focus { border-color: var(--blue); box-shadow: 0 0 0 3px var(--blue-light); }
.bt-actions { margin: 14px 0; display: flex; gap: 10px; align-items: center; }
.bt-strategy-pick { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--gray); font-weight: 600; }
.bt-strategy-pick select { padding: 8px 12px; border: 1px solid var(--border); border-radius: 8px; font-size: 14px; outline: none; max-width: 220px; }
.bt-strategy-pick select:focus { border-color: var(--blue); box-shadow: 0 0 0 3px var(--blue-light); }
.bt-data-info { color: var(--gray); font-size: 13px; }
.bt-editor textarea { width: 100%; height: 240px; border: 1px solid var(--border); border-radius: 10px; padding: 14px; font-family: Consolas, monospace; font-size: 13px; line-height: 1.5; resize: vertical; outline: none; }
.bt-editor textarea:focus { border-color: var(--blue); }
#bt-result { margin-top: 18px; }
.metric-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 12px; margin-bottom: 16px; }
.metric { background: var(--white); border: 1px solid var(--border); border-radius: 10px; padding: 14px; }
.metric-label { font-size: 12px; color: var(--gray); margin-bottom: 6px; }
.metric-value { font-size: 20px; font-weight: 700; color: var(--black); }
.metric-value.pos { color: var(--red); }
.metric-value.neg { color: #16a34a; }
.chart-box { background: var(--white); border: 1px solid var(--border); border-radius: 10px; padding: 16px; margin-bottom: 14px; }
.chart-title { font-weight: 600; margin-bottom: 10px; }
.chart-box canvas { width: 100%; }

/* ---------- 卡片 ---------- */
.card-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 16px; }
.card { background: var(--white); border: 1px solid var(--border); border-radius: 10px; padding: 18px; }
.card:hover { border-color: var(--blue); }
.card-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 10px; }
.card-title { font-size: 16px; font-weight: 700; }
.card-author { font-size: 12px; color: var(--gray); margin-top: 4px; }
.tag { display: inline-block; background: var(--blue-light); color: var(--blue); border-radius: 20px; padding: 3px 10px; font-size: 12px; margin: 6px 6px 0 0; }
.tag.red { background: var(--red-light); color: var(--red); }
.field-label { font-size: 12px; color: var(--gray); margin: 12px 0 4px; font-weight: 600; }
.field-text { color: var(--black); line-height: 1.6; }
.card-actions { margin-top: 14px; display: flex; gap: 8px; flex-wrap: wrap; }

/* ---------- 弹窗 ---------- */
.modal { position: fixed; inset: 0; background: rgba(17,24,39,.55); display: flex; align-items: center; justify-content: center; z-index: 50; }
.modal-box { background: var(--white); border-radius: 12px; width: 480px; max-width: 92vw; max-height: 88vh; display: flex; flex-direction: column; }
.modal-box.wide { width: 860px; }
.modal-head { display: flex; justify-content: space-between; align-items: center; padding: 16px 20px; border-bottom: 1px solid var(--border); font-weight: 700; font-size: 16px; }
.modal-head .btn { margin-left: 8px; }
.modal-body { padding: 20px; overflow: auto; }
.modal-body label { display: block; font-size: 13px; color: var(--gray); margin: 12px 0 5px; font-weight: 600; }
.modal-body input, .modal-body textarea, .modal-body select { width: 100%; padding: 10px 12px; border: 1px solid var(--border); border-radius: 8px; font-size: 14px; outline: none; font-family: inherit; }
.modal-body input:focus, .modal-body textarea:focus, .modal-body select:focus { border-color: var(--blue); box-shadow: 0 0 0 3px var(--blue-light); }
.modal-body textarea { min-height: 90px; resize: vertical; }

#pv-body { min-height: 300px; }
#pv-body iframe { width: 100%; height: 70vh; border: none; }
#pv-body img { max-width: 100%; border-radius: 8px; }
#pv-body pre { white-space: pre-wrap; word-break: break-all; font-family: Consolas, monospace; font-size: 13px; background: var(--gray-bg); padding: 14px; border-radius: 8px; }

/* 表格 */
table.tbl { border-collapse: collapse; font-size: 13px; width: 100%; margin-bottom: 16px; }
table.tbl th, table.tbl td { border: 1px solid var(--border); padding: 6px 10px; text-align: left; }
table.tbl th { background: var(--blue-light); color: var(--blue); }
.tbl-title { font-weight: 600; margin-bottom: 6px; }

/* ---------- Toast ---------- */
.toast { position: fixed; top: 24px; left: 50%; transform: translateX(-50%); background: var(--black); color: #fff; padding: 12px 22px; border-radius: 8px; z-index: 200; box-shadow: 0 6px 20px rgba(0,0,0,.25); font-size: 14px; }
.toast.err { background: var(--red); }

/* ---------- 聊天窗口 ---------- */
.chat-box { background: var(--white); border: 1px solid var(--border); border-radius: 12px; display: flex; flex-direction: column; overflow: hidden; margin-top: 16px; }
.chat-head { display: flex; align-items: center; justify-content: space-between; padding: 12px 16px; border-bottom: 1px solid var(--border); font-weight: 600; }
.chat-tools { display: flex; gap: 8px; align-items: center; }
.chat-model { padding: 6px 10px; border: 1px solid var(--border); border-radius: 8px; font-size: 13px; outline: none; }
.chat-messages { flex: 1; min-height: 220px; max-height: 400px; overflow-y: auto; padding: 14px 16px; background: var(--gray-bg); }
.chat-msg { margin-bottom: 12px; display: flex; }
.chat-msg.user { justify-content: flex-end; }
.chat-msg .bubble { max-width: 82%; padding: 10px 14px; border-radius: 12px; line-height: 1.6; white-space: pre-wrap; word-break: break-word; font-size: 14px; }
.chat-msg.user .bubble { background: var(--blue); color: #fff; border-bottom-right-radius: 4px; }
.chat-msg.assistant .bubble { background: var(--white); border: 1px solid var(--border); border-bottom-left-radius: 4px; }
.chat-msg.assistant .bubble pre { background: var(--gray-bg); padding: 8px 10px; border-radius: 6px; overflow-x: auto; font-family: Consolas, monospace; font-size: 12px; margin: 6px 0; }
.chat-input { display: flex; gap: 8px; padding: 12px 16px; border-top: 1px solid var(--border); }
.chat-input textarea { flex: 1; min-height: 44px; max-height: 120px; resize: vertical; border: 1px solid var(--border); border-radius: 8px; padding: 10px 12px; font-size: 14px; font-family: inherit; outline: none; }
.chat-input textarea:focus { border-color: var(--blue); box-shadow: 0 0 0 3px var(--blue-light); }
.chat-input .btn { align-self: flex-end; }
.chat-loading { color: var(--gray); font-style: italic; padding: 4px 0; }

/* ---------- 数据池 ---------- */
.dp-info { color: var(--gray); font-size: 13px; margin-bottom: 12px; }
.dp-cats { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 14px; }
.dp-cat { background: var(--white); border: 1px solid var(--border); border-radius: 10px; padding: 12px 16px; cursor: pointer; min-width: 130px; }
.dp-cat:hover { border-color: var(--blue); }
.dp-cat.active { border-color: var(--blue); background: var(--blue-light); }
.dp-cat .dp-cat-label { font-weight: 600; }
.dp-cat .dp-cat-count { color: var(--gray); font-size: 12px; margin-top: 4px; }
.dp-file { background: var(--white); border: 1px solid var(--border); border-radius: 8px; padding: 12px 14px; margin-bottom: 8px; display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.dp-file-name { font-weight: 500; word-break: break-all; }
.dp-file-meta { color: var(--gray); font-size: 12px; }

/* ---------- 汉堡按钮 ---------- */
.hamburger { display: none; background: none; border: none; font-size: 22px; line-height: 1; cursor: pointer; color: var(--black); padding: 4px 8px; border-radius: 6px; }
.hamburger:hover { background: var(--gray-bg); }

/* ---------- 移动端适配 ---------- */
@media (max-width: 768px) {
  .hamburger { display: inline-block; }

  .login-card { width: 92vw; max-width: 340px; padding: 28px 22px; }

  .app { grid-template-columns: 1fr; grid-template-rows: 56px 1fr; }
  .header { grid-column: 1; padding: 0 10px; }
  .brand { font-size: 16px; }
  .brand-dot { width: 10px; height: 10px; }
  .header-user { display: none; }
  #btn-wind { display: none; }
  .header-actions .btn { padding: 6px 9px; font-size: 12px; }
  .header-actions { gap: 6px; }

  .sidebar { position: fixed; top: 56px; left: 0; bottom: 0; width: 230px; transform: translateX(-105%); transition: transform .25s ease; z-index: 40; box-shadow: 2px 0 14px rgba(0,0,0,.18); overflow: auto; }
  .app.menu-open .sidebar { transform: translateX(0); }

  .main { padding: 14px 12px 90px; }

  .panel-head { flex-wrap: wrap; gap: 10px; }
  .panel-head h2 { font-size: 18px; }
  .panel-tools { flex-wrap: wrap; }

  .dash-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .dash-card { padding: 14px; }
  .dash-num { font-size: 24px; }

  .file-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .card-grid { grid-template-columns: 1fr; }

  .program-layout { grid-template-columns: 1fr; height: auto; }
  .copilot-layout { grid-template-columns: 1fr; height: auto; }
  .copilot-chat { height: 420px; }
  .program-list { max-height: 150px; }
  .program-editor { min-height: 70vh; }
  #p-code { min-height: 220px; }
  .editor-bar { flex-wrap: wrap; }
  .editor-name { flex: 1 1 100%; }
  .result { height: 220px; }

  .bt-form { flex-direction: column; }
  .bt-form label { width: 100%; }
  .bt-form input, .bt-form select { width: 100%; min-width: 0; }
  .bt-actions { flex-wrap: wrap; }
  .bt-strategy-pick { flex-wrap: wrap; width: 100%; }
  .bt-strategy-pick select { max-width: 100%; flex: 1; }
  .bt-editor textarea { height: 200px; }
  .metric-grid { grid-template-columns: repeat(2, 1fr); }
  .chart-box { padding: 12px; }

  .modal-box { width: 96vw; max-height: 92vh; }
  .modal-box.wide { width: 96vw; }
  .modal-head { padding: 12px 14px; }
  .modal-body { padding: 14px; }

  table.tbl { display: block; overflow-x: auto; white-space: nowrap; }
}