:root { --bg:#0b1220; --card:#121a2a; --text:#e8eefc; --muted:#9bb0d1; --line:#1f2a44; }
*{ box-sizing:border-box; }
body{ margin:0; font-family: system-ui, -apple-system, Segoe UI, Roboto, "PingFang SC","Microsoft YaHei", sans-serif; background:var(--bg); color:var(--text); }
a{ color:#b9d2ff; text-decoration:none; }
.wrap{ max-width:1100px; margin:0 auto; padding:22px; }

.top{ display:flex; align-items:flex-start; justify-content:space-between; gap:16px; margin-bottom:16px; }
h1{ margin:0; font-size:22px; }
.sub{ color:var(--muted); font-size:13px; margin-top:6px; }
.nav a{ margin-left:14px; padding:8px 10px; border:1px solid var(--line); border-radius:10px; background:rgba(255,255,255,0.03); }

.cards{ display:grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap:12px; margin: 12px 0 18px; }
.card{ background:var(--card); border:1px solid var(--line); border-radius:14px; padding:14px; }
.label{ color:var(--muted); font-size:12px; }
.value{ font-size:26px; margin-top:10px; }
.hint{ color:var(--muted); font-size:12px; margin-top:8px; }

.panel{ background:var(--card); border:1px solid var(--line); border-radius:14px; padding:14px; margin-bottom:12px; }
.panel h2{ margin:0 0 10px; font-size:16px; }

/* ✅ 图表容器：必须给高度，否则手机端会塌/挤 */
.chart{
  width:100%;
  height:320px;
  border-radius:12px;
}



.form{ display:flex; flex-direction:column; gap:10px; }
.form.grid{ display:grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap:10px; }
.form .full{ grid-column:1 / -1; }
label{ font-size:12px; color:var(--muted); }
input{ width:100%; padding:10px 10px; border-radius:10px; border:1px solid var(--line); background:#0e1626; color:var(--text); }
button{ padding:10px 12px; border-radius:10px; border:1px solid #2b3b62; background:#17305c; color:var(--text); cursor:pointer; }
button:hover{ filter:brightness(1.08); }
.error{ color:#ffb3b3; }

/* ✅ 移动端：两列改一列，图表高度略减 */
@media (max-width: 720px){
  .wrap{ padding:14px; }

  /* ✅ 手机上两张卡同一行 */
  .cards{
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap:10px;
  }

  .card{
    padding:12px;
  }

  .value{
    font-size:22px;   /* 稍微小一点，防挤 */
  }

  .chart{ height:240px; }
}