:root {
  --bg: #0d1117;
  --bg2: #161b22;
  --bg3: #1c2330;
  --border: #2d333b;
  --text: #e6edf3;
  --muted: #8b949e;
  --accent: #3b82f6;
  --green: #22c55e;
  --red: #ef4444;
  --yellow: #eab308;
  --radius: 10px;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
}
a { color: var(--accent); text-decoration: none; }
input, select, button, textarea {
  font-family: inherit;
}
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-thumb { background: #30363d; border-radius: 4px; }
::-webkit-scrollbar-track { background: transparent; }

/* 布局 */
.topbar {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; gap: 16px;
  height: 54px; padding: 0 20px;
  background: var(--bg2); border-bottom: 1px solid var(--border);
}
.brand { font-weight: 700; font-size: 16px; letter-spacing: .5px; }
.brand span { color: var(--accent); }
.topbar nav { display: flex; gap: 4px; flex: 1; }
.topbar nav a {
  padding: 8px 14px; border-radius: 8px; color: var(--muted);
  font-size: 14px;
}
.topbar nav a:hover { color: var(--text); background: var(--bg3); }
.topbar nav a.active { color: var(--text); background: var(--bg3); }
.topbar .userbox { display: flex; align-items: center; gap: 10px; }
.avatar {
  width: 30px; height: 30px; border-radius: 50%;
  background: var(--accent); color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 13px;
}
.container { max-width: 1400px; margin: 0 auto; padding: 16px 20px 40px; }

/* 卡片 */
.card {
  background: var(--bg2); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 16px;
  margin-bottom: 16px;
}
.card h3 { font-size: 14px; margin-bottom: 12px; color: var(--muted); font-weight: 600; }
.card-title { display: flex; justify-content: space-between; align-items: center; margin-bottom: 12px; }
.card-title h3 { margin: 0; }

/* 网格 */
.grid { display: grid; gap: 16px; }
.grid.cols-4 { grid-template-columns: repeat(4, 1fr); }
.grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
@media (max-width: 900px) {
  .grid.cols-4, .grid.cols-3, .grid.cols-2 { grid-template-columns: 1fr; }
}

/* 统计 */
.stat { background: var(--bg2); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; }
.stat .label { color: var(--muted); font-size: 12px; margin-bottom: 6px; }
.stat .value { font-size: 22px; font-weight: 700; }
.stat .value.up { color: var(--green); }
.stat .value.down { color: var(--red); }

/* 按钮 */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 8px 16px; border-radius: 8px; border: 1px solid var(--border);
  background: var(--bg3); color: var(--text); cursor: pointer;
  font-size: 14px; transition: .15s;
}
.btn:hover { border-color: var(--accent); }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.primary:hover { filter: brightness(1.1); }
.btn.success { background: var(--green); border-color: var(--green); color: #fff; }
.btn.danger { background: transparent; border-color: var(--red); color: var(--red); }
.btn.sm { padding: 4px 10px; font-size: 12px; }
.btn.buy { background: var(--green); border-color: var(--green); color: #fff; }
.btn.sell { background: var(--red); border-color: var(--red); color: #fff; }

/* 表单 */
.form-group { margin-bottom: 14px; }
.form-group label { display: block; margin-bottom: 6px; color: var(--muted); font-size: 13px; }
.form-group input, .form-group select, .form-group textarea {
  width: 100%; padding: 9px 12px; border-radius: 8px;
  border: 1px solid var(--border); background: var(--bg);
  color: var(--text); font-size: 14px;
}
.form-group input:focus, .form-group select:focus { outline: none; border-color: var(--accent); }
.form-row { display: flex; gap: 12px; }
.form-row .form-group { flex: 1; }

/* 表格 */
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--border); font-size: 13px; }
th { color: var(--muted); font-weight: 600; font-size: 12px; white-space: nowrap; }
tbody tr:hover { background: var(--bg3); }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }
.up { color: var(--green); }
.down { color: var(--red); }

/* 徽章 */
.badge { display: inline-block; padding: 2px 10px; border-radius: 20px; font-size: 12px; }
.badge.green { background: rgba(34,197,94,.15); color: var(--green); }
.badge.red { background: rgba(239,68,68,.15); color: var(--red); }
.badge.gray { background: rgba(139,148,158,.15); color: var(--muted); }
.badge.blue { background: rgba(59,130,246,.15); color: var(--accent); }
.badge.yellow { background: rgba(234,179,8,.15); color: var(--yellow); }

/* 登录页 */
.auth-wrap {
  min-height: 100vh; display: flex; align-items: center; justify-content: center;
  background: radial-gradient(ellipse at top, #1c2330, #0d1117);
}
.auth-box { width: 380px; background: var(--bg2); border: 1px solid var(--border); border-radius: 14px; padding: 32px; }
.auth-box h1 { font-size: 22px; margin-bottom: 4px; }
.auth-box .sub { color: var(--muted); margin-bottom: 24px; font-size: 13px; }
.auth-tabs { display: flex; gap: 8px; margin-bottom: 20px; }
.auth-tabs button {
  flex: 1; padding: 8px; border-radius: 8px; border: 1px solid var(--border);
  background: transparent; color: var(--muted); cursor: pointer;
}
.auth-tabs button.active { background: var(--bg3); color: var(--text); }

/* 提示 */
.toast-wrap { position: fixed; top: 70px; right: 20px; z-index: 999; display: flex; flex-direction: column; gap: 8px; }
.toast {
  padding: 10px 16px; border-radius: 8px; background: var(--bg3);
  border: 1px solid var(--border); font-size: 13px; min-width: 220px;
  box-shadow: 0 4px 16px rgba(0,0,0,.4); animation: slidein .2s;
}
.toast.ok { border-color: var(--green); }
.toast.err { border-color: var(--red); }
@keyframes slidein { from { transform: translateX(20px); opacity: 0; } to { transform: none; opacity: 1; } }

/* 模态 */
.modal-mask {
  position: fixed; inset: 0; background: rgba(0,0,0,.55); z-index: 200;
  display: flex; align-items: center; justify-content: center;
}
.modal {
  width: 560px; max-width: 94vw; max-height: 86vh; overflow: auto;
  background: var(--bg2); border: 1px solid var(--border); border-radius: 14px; padding: 24px;
}
.modal h2 { font-size: 17px; margin-bottom: 18px; }
.modal .actions { display: flex; justify-content: flex-end; gap: 10px; margin-top: 20px; }

/* 交易面板 */
.trade-panel { display: grid; grid-template-columns: 1fr 320px; gap: 16px; }
@media (max-width: 1000px) { .trade-panel { grid-template-columns: 1fr; } }
.price-head { display: flex; align-items: baseline; gap: 12px; margin-bottom: 10px; }
.price-head .big { font-size: 26px; font-weight: 700; }
.buy-sell { display: flex; gap: 10px; margin-top: 18px; }
.buy-sell .btn { flex: 1; padding: 12px; font-size: 15px; }
.table-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; }
.table-scroll table { min-width: 100%; }

/* 行情行 */
.ticker-row {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(210px, 1fr)); gap: 10px;
}
.ticker-cell {
  background: var(--bg2); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 12px; cursor: pointer; transition: .15s;
}
.ticker-cell:hover { border-color: var(--accent); }
.ticker-cell .sym { font-weight: 700; }
.ticker-cell .last { font-size: 18px; font-weight: 700; margin-top: 4px; }
.ticker-cell .meta { color: var(--muted); font-size: 12px; margin-top: 4px; display: flex; justify-content: space-between; }
.ticker-cell.selected { border-color: var(--accent); }

/* 图表示意 */
.klines-box { height: 380px; position: relative; overflow: hidden; }
.klines-canvas { width: 100%; height: 100%; display: block; }

.empty { text-align: center; color: var(--muted); padding: 40px 0; }
.muted { color: var(--muted); }
.text-right { text-align: right; }
.mt16 { margin-top: 16px; }
.mt12 { margin-top: 12px; }
.mb12 { margin-bottom: 12px; }
.flex { display: flex; align-items: center; gap: 10px; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.flex-1 { flex: 1; }
.strat-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 16px; }
.strat-card {
  border: 1px solid var(--border); border-radius: 12px; padding: 16px; background: var(--bg2);
  display: flex; flex-direction: column; gap: 8px;
}
.strat-card h4 { font-size: 15px; margin: 0; }
@media (max-width: 700px) { .strat-grid { grid-template-columns: 1fr; } }
.code {
  font-family: Consolas, monospace; background: var(--bg); border: 1px solid var(--border);
  padding: 2px 6px; border-radius: 6px; font-size: 12px;
}