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

body {
  font-family: -apple-system, "Microsoft YaHei", "PingFang SC", sans-serif;
}

.tool-card {
  background: white;
  border-radius: 12px;
  padding: 20px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.08);
  transition: all 0.2s;
  display: block;
  text-decoration: none;
  border: 1px solid #f0f0f0;
}

.tool-card:hover {
  box-shadow: 0 4px 16px rgba(0,0,0,0.1);
  transform: translateY(-2px);
  border-color: #c7d2fe;
}

/* Calculator page styles */
.calc-container {
  max-width: 640px;
  margin: 0 auto;
  padding: 20px;
}

.calc-card {
  background: white;
  border-radius: 16px;
  padding: 24px;
  box-shadow: 0 2px 12px rgba(0,0,0,0.06);
  margin-bottom: 20px;
}

.calc-card h2 {
  font-size: 18px;
  font-weight: 700;
  color: #1e293b;
  margin-bottom: 16px;
}

.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: #374151;
  margin-bottom: 6px;
}

.form-group input,
.form-group select {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid #e5e7eb;
  border-radius: 8px;
  font-size: 16px;
  transition: border-color 0.2s;
  outline: none;
}

.form-group input:focus,
.form-group select:focus {
  border-color: #6366f1;
  box-shadow: 0 0 0 3px rgba(99,102,241,0.1);
}

.form-group .hint {
  font-size: 12px;
  color: #9ca3af;
  margin-top: 4px;
}

.btn-primary {
  width: 100%;
  padding: 12px;
  background: linear-gradient(135deg, #6366f1, #4f46e5);
  color: white;
  border: none;
  border-radius: 10px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: opacity 0.2s;
}

.btn-primary:hover {
  opacity: 0.9;
}

.btn-primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.result-box {
  background: #f0fdf4;
  border: 1px solid #bbf7d0;
  border-radius: 12px;
  padding: 20px;
  margin-top: 16px;
  display: none;
}

.result-box.show {
  display: block;
}

.result-box .result-amount {
  font-size: 36px;
  font-weight: 800;
  color: #16a34a;
  text-align: center;
  margin: 8px 0;
}

.result-box .result-label {
  font-size: 14px;
  color: #6b7280;
  text-align: center;
}

.result-detail {
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid #e5e7eb;
}

.result-detail .detail-row {
  display: flex;
  justify-content: space-between;
  padding: 6px 0;
  font-size: 14px;
  color: #4b5563;
}

.result-detail .detail-row .value {
  font-weight: 600;
  color: #1e293b;
}

.ai-section {
  margin-top: 16px;
  padding: 16px;
  background: #eff6ff;
  border-radius: 12px;
  border: 1px solid #bfdbfe;
}

.ai-section .ai-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  background: #3b82f6;
  color: white;
  border: none;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.2s;
}

.ai-section .ai-btn:hover {
  background: #2563eb;
}

.ai-section .ai-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.ai-result {
  margin-top: 12px;
  font-size: 14px;
  color: #374151;
  line-height: 1.8;
  white-space: pre-wrap;
  display: none;
}

.ai-result.show {
  display: block;
}

.page-header {
  background: linear-gradient(135deg, #6366f1, #4f46e5);
  color: white;
  padding: 24px;
  text-align: center;
}

.page-header h1 {
  font-size: 22px;
  font-weight: 700;
}

.page-header p {
  font-size: 14px;
  opacity: 0.85;
  margin-top: 4px;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: white;
  text-decoration: none;
  font-size: 14px;
  opacity: 0.85;
  margin-bottom: 12px;
}

.back-link:hover {
  opacity: 1;
}

/* 深色模式 */
.dark body, .dark { background: #0f172a !important; color: #e2e8f0 !important; }
.dark .tool-card { background: #1e293b; border-color: #334155; color: #e2e8f0; }
.dark .tool-card:hover { border-color: #6366f1; }
.dark .tool-card h3 { color: #f1f5f9; }
.dark .tool-card p { color: #94a3b8; }
.dark .calc-card { background: #1e293b; }
.dark .calc-card h2 { color: #f1f5f9; }
.dark .form-group label { color: #cbd5e1; }
.dark .form-group input, .dark .form-group select { background: #0f172a; border-color: #475569; color: #e2e8f0; }
.dark .result-box { background: #0f2922; border-color: #166534; }
.dark .result-box .result-label { color: #86efac; }
.dark .result-box .result-amount { color: #4ade80; }
.dark .result-detail .detail-row { color: #94a3b8; }
.dark .result-detail .detail-row .value { color: #e2e8f0; }
.dark .ai-section { background: #1e3a5f; border-color: #1e40af; }
.dark .page-header { background: linear-gradient(135deg, #4338ca, #3730a3); }
.dark footer { background: #0f172a; }
.dark #searchInput { background: rgba(255,255,255,0.1); border-color: rgba(255,255,255,0.2); color: #f1f5f9; }

/* 分享按钮 */
.share-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  background: #10b981;
  color: white;
  border: none;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.2s;
  margin-top: 12px;
}
.share-btn:hover { background: #059669; }