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

body {
  font-family: "Microsoft YaHei", "PingFang SC", sans-serif;
  background: #e8f0e4;
  color: #2c3e2c;
  min-height: 100vh;
}

header {
  text-align: center;
  padding: 22px 16px 10px;
  background: linear-gradient(135deg, #4a7c59, #6b9e78);
  color: #fff;
}

header h1 { font-size: 1.7rem; margin-bottom: 4px; }
header p  { font-size: 0.9rem; opacity: 0.9; }
header .title-en { font-size: 0.78rem; opacity: 0.78; margin-top: 5px; letter-spacing: 0.06em; }

.layout {
  display: grid;
  grid-template-columns: 220px 1fr 220px;
  gap: 0;
  max-width: 1200px;
  margin: 0 auto;
  min-height: calc(100vh - 96px);
}

.sidebar {
  padding: 20px 14px;
  font-size: 0.85rem;
  line-height: 1.7;
}

.sidebar-left  { background: #f5f0e8; border-right: 2px dashed #c8b89a; }
.sidebar-right { background: #eef4f8; border-left:  2px dashed #a8c4d4; }

.sidebar h3 {
  font-size: 0.95rem;
  margin-bottom: 10px;
  padding-bottom: 6px;
  border-bottom: 2px solid currentColor;
}

.sidebar-left h3  { color: #8b6914; }
.sidebar-right h3 { color: #2e6b8a; }

.profile-item, .fact-item {
  margin-bottom: 8px;
  padding: 6px 8px;
  border-radius: 6px;
  background: rgba(255,255,255,0.6);
}

.profile-item strong { color: #8b6914; }

.main-center {
  padding: 28px 24px 48px;
  background: linear-gradient(180deg, #f0f5ec 0%, #e4ede0 100%);
}

footer {
  text-align: center;
  padding: 14px;
  font-size: 0.8rem;
  color: #888;
  background: #dde8d8;
}

.btn {
  padding: 9px 20px;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.88rem;
  font-family: inherit;
  transition: all 0.2s;
  text-decoration: none;
  display: inline-block;
}

.btn-primary { background: #5b8fd4; color: #fff; }
.btn-primary:hover { background: #4a7ec0; }
.btn-success { background: #4a7c59; color: #fff; }
.btn-success:hover { background: #3d6849; }
.btn-warn { background: #e8a838; color: #fff; }
.btn-warn:hover { background: #d4972f; }
.btn-outline { background: #fff; border: 2px solid #888; color: #555; }
.btn-outline:hover { background: #f5f5f5; }
.btn:disabled { opacity: 0.45; cursor: not-allowed; }

.page-card {
  max-width: 620px;
  margin: 0 auto;
  background: #fff;
  border-radius: 16px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.08);
  overflow: hidden;
}

.page-card-header {
  padding: 18px 22px;
  color: #fff;
  display: flex;
  align-items: center;
  gap: 12px;
}

.page-card-header .num {
  width: 38px; height: 38px;
  border-radius: 50%;
  background: rgba(255,255,255,0.25);
  display: flex; align-items: center; justify-content: center;
  font-weight: bold; font-size: 1.1rem;
  flex-shrink: 0;
}

.page-card-header h2 { font-size: 1.15rem; }
.page-card-header p  { font-size: 0.8rem; opacity: 0.88; margin-top: 2px; }

.page-card-body { padding: 22px; }
.page-card-body p { margin-bottom: 12px; line-height: 1.75; font-size: 0.92rem; }
.page-card-footer {
  padding: 0 22px 22px;
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
}

.theme-1 .page-card-header { background: #e8a838; }
.theme-2 .page-card-header { background: #5b8fd4; }
.theme-3 .page-card-header { background: #9b72c4; }
.theme-4 .page-card-header { background: #e07070; }

.feedback {
  padding: 12px 14px;
  border-radius: 8px;
  margin-top: 12px;
  font-size: 0.88rem;
  line-height: 1.6;
  display: none;
}

.feedback.show { display: block; }
.feedback.ok  { background: #e8f5e9; color: #2e7d32; border-left: 4px solid #4a7c59; }
.feedback.err { background: #fde8e8; color: #c0392b; border-left: 4px solid #e07070; }
.feedback.info { background: #eef4f8; color: #2e6b8a; border-left: 4px solid #5b8fd4; }

@media (max-width: 800px) {
  .layout { grid-template-columns: 1fr; }
  .sidebar { display: none; }
}