/* 视觉增强 */
:root {
  --bg: #f6f8fb;
  --header-grad-1: #2b5876;
  --header-grad-2: #4e4376;
  --primary: #0d6efd;
  --primary-600: #0b5ed7;
  --success: #28a745;
  --success-600: #218838;
  --text-1: #1f2937;
  --text-2: #4b5563;
  --border: #e5e7eb;
  --card: #ffffff;
  --muted: #f3f4f6;
}

body {
  font-family: "Microsoft YaHei", Arial, sans-serif;
  background: var(--bg);
  color: var(--text-1);
  margin: 0;
  padding: 0;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 28px;
}

.header {
  background: linear-gradient(135deg, var(--header-grad-1), var(--header-grad-2));
  box-shadow: 0 4px 14px rgba(0,0,0,.15);
  border-bottom: 1px solid rgba(255,255,255,.08);
  color: white;
  text-align: center;
  padding: 28px 0;
  margin-bottom: 30px;
}

.header h1 {
  margin: 0;
  font-size: 32px;
  letter-spacing: .5px;
}

/* Top navigation */
.top-nav { margin-top: 12px; display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; }
.nav-link {
  display: inline-block;
  padding: 8px 14px;
  border-radius: 999px;
  background: rgba(255,255,255,.15);
  color: #fff;
  text-decoration: none;
  border: 1px solid rgba(255,255,255,.25);
  transition: background .15s ease, transform .15s ease;
  font-weight: 500;
}
.nav-link:hover { background: rgba(255,255,255,.25); transform: translateY(-1px); }
.nav-link.active { background: #fff; color: #1f2937; }

.card {
  background-color: #fff;
  border: 1px solid var(--border);
  border-radius: 5px;
  box-shadow: 0 10px 24px rgba(0,0,0,.06);
  transition: box-shadow .2s ease, transform .2s ease;
  margin-bottom: 20px;
  overflow: hidden;
}

.card:hover {
  box-shadow: 0 14px 32px rgba(0,0,0,.08);
}

.card-header {
  background: linear-gradient(135deg, #0ea5e9, #2563eb);
  border-bottom: 1px solid rgba(255,255,255,.15);
  color: white;
  padding: 18px;
  font-size: 18px;
  font-weight: bold;
}

.card-body {
  padding: 28px;
  position: relative;
}

.card-body::after {
  content: "";
  position: absolute; left: 20px; right: 20px; bottom: -1px;
  height: 1px; background: linear-gradient(to right, transparent, var(--border), transparent);
}

.form-group {
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
    color: #333;
    font-size: 15px;
}

.form-control {
  border: 1px solid var(--border);
  background: #fff;
  transition: border-color .2s ease, box-shadow .2s ease;
  width: 100%;
  padding: 12px 14px;
  font-size: 16px;
  height: 44px;
  border-radius: 4px;
  box-sizing: border-box;
}

.form-control:focus {
  outline: none;
  border-color: #93c5fd;
  box-shadow: 0 0 0 3px rgba(59,130,246,.15);
}

.form-group small {
  color: var(--text-2);
}

.form-row {
  display: flex;
  flex-wrap: wrap;
  margin-right: -10px;
  margin-left: -10px;
  gap: 18px;
}

.form-col {
  flex: 1;
  padding: 0 10px;
  min-width: 220px;
}

@media (max-width: 768px) {
  .form-row { flex-direction: column; }
  .form-col { width: 100%; padding: 0; }
  .btn-block { width: 100%; }
}

/* 胶囊式单选 */
.radio-group { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.radio-label { margin: 0; }
.radio-label input { display: none; }
.radio-pill {
  display: inline-block;
  padding: 8px 16px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--card);
  color: var(--text-2);
  transition: all .15s ease;
  font-size: 14px;
}
.radio-label input:checked + .radio-pill {
  background: #e8f0fe;
  color: var(--primary);
  border-color: #cfe1ff;
  box-shadow: 0 0 0 3px rgba(59,130,246,.12);
}
.radio-pill:hover { border-color: #cfe1ff; color: var(--primary); }

/* 结果区 */
.result-group {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px 20px;
  border-top: 1px dashed var(--border);
}

.result-item {
  display: flex;
  justify-content: space-between;
  margin-bottom: 10px;
  padding: 6px 0;
}

.result-label {
  font-weight: 500;
  color: var(--text-2);
  font-size: 14px;
}

.result-value {
  font-weight: 600;
  color: #111827;
  font-size: 16px;
}

/* 按钮与状态 */
.btn {
  display: inline-block;
  font-weight: 400;
  text-align: center;
  white-space: nowrap;
  vertical-align: middle;
  user-select: none;
  border: 1px solid transparent;
  padding: 12px 18px;
  font-size: 16px;
  line-height: 1.5;
  border-radius: 0.25rem;
  transition: color 0.15s ease-in-out, background-color 0.15s ease-in-out, border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
  cursor: pointer;
  box-shadow: 0 1px 2px rgba(0,0,0,.05);
}

.btn-primary {
  background: var(--primary);
  border-color: var(--primary);
}

.btn-primary:hover {
  background: var(--primary-600);
  border-color: var(--primary-600);
}

.btn-success {
  background: var(--success);
  border-color: var(--success);
}

.btn-success:hover {
  background: var(--success-600);
  border-color: var(--success-600);
}

.btn-block {
    display: block;
    width: 100%;
    height: 48px;
    font-weight: 600;
    letter-spacing: .2px;
}

.radio-group {
    margin-bottom: 15px;
}

.radio-label {
    margin-right: 15px;
    cursor: pointer;
}

.result-group {
    margin-top: 20px;
    border-top: 1px solid #ddd;
    padding-top: 20px;
}

.result-item {
    display: flex;
    justify-content: space-between;
    margin-bottom: 10px;
}

.result-label {
    font-weight: 500;
    color: #666;
}

.result-value {
    font-weight: 600;
    color: #007bff;
}

.disabled {
    background-color: #e9ecef;
    opacity: 1;
}

.export-actions {
    margin-top: 24px;
    text-align: center;
}