:root {
  --bg: #f4f6f9;
  --panel: #ffffff;
  --border: #e3e8ef;
  --text: #1f2933;
  --muted: #7b8794;
  --accent: #2f7fd4;
  --accent-soft: #e7f0fb;
  --in: #16a34a;
  --in-soft: #e7f6ec;
  --sold: #9aa5b1;
  --sold-soft: #eef1f4;
  --radius: 12px;
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body {
  font-family: -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg); color: var(--text); font-size: 14px;
}
.layout { display: flex; min-height: 100vh; }
.sidebar {
  width: 200px; flex-shrink: 0; background: #1c2733; color: #cdd8e3;
  padding: 22px 14px; display: flex; flex-direction: column; gap: 6px;
}
.brand { font-size: 17px; font-weight: 700; color: #fff; padding: 4px 10px 18px; }
.nav {
  display: block; width: 100%; text-align: left; padding: 11px 12px;
  border: none; background: transparent; color: #cdd8e3;
  font-size: 14px; border-radius: 8px; cursor: pointer;
}
.nav:hover { background: rgba(255,255,255,.07); }
.nav.active { background: var(--accent); color: #fff; font-weight: 600; }
.content { flex: 1; padding: 26px 30px; max-width: 1060px; }
h1 { font-size: 22px; margin: 0 0 18px; }
h2 { font-size: 15px; margin: 0 0 12px; color: var(--text); }
.muted { color: var(--muted); }

/* cards */
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); gap: 14px; margin-bottom: 22px; }
.card {
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 16px 18px;
}
.card-num { font-size: 26px; font-weight: 700; letter-spacing: .5px; }
.card-label { color: var(--muted); margin-top: 4px; font-size: 13px; }
.card-label span { margin-left: 4px; }

.panel { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px; margin-bottom: 20px; }

/* tables */
.tbl { width: 100%; border-collapse: collapse; }
.tbl th, .tbl td { text-align: left; padding: 9px 10px; border-bottom: 1px solid var(--border); }
.tbl th { color: var(--muted); font-weight: 600; font-size: 12px; }
.tbl tr:last-child td { border-bottom: none; }

/* status pill */
.pill { display: inline-block; padding: 2px 10px; border-radius: 999px; font-size: 12px; }
.pill.in { background: var(--in-soft); color: var(--in); }
.pill.sold { background: var(--sold-soft); color: var(--sold); }
.pos { color: var(--in); }
.neg { color: #dc2626; }

/* buttons */
.btn {
  display: inline-block; background: var(--accent); color: #fff; border: none;
  padding: 8px 16px; border-radius: 8px; font-size: 13px; cursor: pointer; text-decoration: none;
}
.btn:hover { background: #256bc0; }
.btn.ghost { background: var(--accent-soft); color: var(--accent); }

/* form */
.fmt { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 12px; }
.field label { display: block; color: var(--muted); font-size: 12px; margin-bottom: 4px; }
.field input, .field select {
  width: 100%; padding: 8px 10px; border: 1px solid var(--border);
  border-radius: 8px; font-size: 13px; background: #fff; color: var(--text);
}
.row { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; margin-top: 12px; }

/* filter tabs */
.tabs { display: flex; gap: 8px; margin-bottom: 14px; }
.tab {
  padding: 6px 16px; border-radius: 999px; border: 1px solid var(--border);
  background: var(--panel); color: var(--muted); cursor: pointer; font-size: 13px;
}
.tab.active { background: var(--accent); color: #fff; border-color: var(--accent); }

.search {
  width: 100%; max-width: 300px; padding: 8px 12px; border: 1px solid var(--border);
  border-radius: 8px; font-size: 13px; margin-bottom: 14px;
}

.msg { padding: 10px 14px; border-radius: 8px; margin-top: 12px; font-size: 13px; }
.msg.ok { background: var(--in-soft); color: var(--in); }
.msg.err { background: #fdecec; color: #dc2626; }
.msg.info { background: var(--accent-soft); color: var(--accent); }
.msg ul { margin: 6px 0 0; padding-left: 18px; }

.sale-item { padding: 12px 14px; border: 1px solid var(--border); border-radius: 8px; margin-bottom: 12px; }
.sale-item b { font-size: 15px; }
.preview { display: flex; gap: 24px; margin-top: 12px; }
.preview div { color: var(--muted); font-size: 13px; }
.preview b { color: var(--text); font-size: 16px; display: block; margin-top: 2px; }
.platforms { margin-top: 22px; }
.platform-list { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 10px; }
.platform-tag { background: var(--accent-soft); color: var(--accent); padding: 6px 12px; border-radius: 999px; font-size: 13px; }

/* ============ 手机端适配 ============ */
@media (max-width: 860px) {
  .layout { flex-direction: column; }
  .sidebar { width: 100%; padding: 12px 10px; gap: 4px; }
  .brand { font-size: 15px; padding: 0 8px 10px; }
  .sidebar nav { display: flex; gap: 6px; overflow-x: auto; -webkit-overflow-scrolling: touch; }
  .nav { white-space: nowrap; padding: 9px 12px; font-size: 13px; }
  .content { padding: 16px; }
  h1 { font-size: 19px; margin-bottom: 14px; }
  .cards { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .card { padding: 14px; }
  .card-num { font-size: 22px; }
  .fmt { grid-template-columns: 1fr 1fr; gap: 10px; }
  .panel { padding: 14px; overflow-x: auto; -webkit-overflow-scrolling: touch; }
  .tbl { min-width: 600px; }
  .preview { flex-wrap: wrap; gap: 14px; }
  .row .btn, .sale-item .btn { padding: 10px 18px; font-size: 14px; }
}
@media (max-width: 460px) {
  .cards { grid-template-columns: 1fr; }
  .fmt { grid-template-columns: 1fr; }
  .card-num { font-size: 24px; }
  .search { max-width: none; }
  .tabs { flex-wrap: wrap; }
}