:root {
  --bg: #f3f7ff;
  --bg2: #edf8ff;
  --panel: rgba(255, 255, 255, 0.92);
  --line: rgba(133, 153, 192, 0.3);
  --text: #162033;
  --muted: #5a667d;
  --primary: #2563eb;
  --primary-2: #0ea5e9;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Avenir Next", "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(900px 340px at 8% -10%, #dbe9ff 0%, transparent 60%),
    radial-gradient(760px 280px at 88% -8%, #d7f6ff 0%, transparent 60%),
    linear-gradient(180deg, var(--bg2) 0%, var(--bg) 42%, #f8fbff 100%);
}

.container {
  width: min(980px, calc(100% - 34px));
  margin: 0 auto;
  padding: 20px 0 42px;
}

header { margin-bottom: 14px; }
header a { color: #214f9f; text-decoration: none; font-weight: 700; }
h1 { margin: 0 0 8px; font-size: clamp(28px, 4.2vw, 36px); }
h2 { margin: 0 0 10px; font-size: 22px; }
.muted { color: var(--muted); }

.panel {
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 16px;
  background: var(--panel);
  margin-bottom: 14px;
  box-shadow: 0 14px 32px rgba(31, 42, 72, 0.1);
}

.row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

input[type="file"],
input[type="number"],
input[type="text"],
textarea,
select {
  width: 100%;
  border: 1px solid #c7d5ef;
  border-radius: 11px;
  padding: 10px 12px;
  font-size: 14px;
  background: rgba(255, 255, 255, 0.98);
}

input:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: rgba(37, 99, 235, 0.55);
  box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.1);
}

textarea { min-height: 180px; }

button,
.btn {
  border: none;
  border-radius: 11px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-2) 100%);
  color: #fff;
  padding: 10px 14px;
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
  font-weight: 700;
}

button.secondary,
.btn.secondary {
  background: #64748b;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 10px;
}

.card {
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 11px;
  background: rgba(255, 255, 255, 0.96);
}

ul { margin: 8px 0 0; padding-left: 18px; }
img.preview { max-width: 100%; border-radius: 8px; border: 1px solid var(--line); background: #fff; }
small { color: var(--muted); }

@media (max-width: 760px) {
  .container { width: calc(100% - 22px); }
}