:root {
  --brand: #0f4c81;
  --brand-2: #1769aa;
  --accent: #f2a541;
  --bg: #f4f7fb;
  --panel: #ffffff;
  --text: #1f2937;
  --muted: #5f6b7a;
  --line: #d7dee8;
}

* { box-sizing: border-box; }

body.portal-body {
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 5% 5%, rgba(15, 76, 129, .08), transparent 35%),
    radial-gradient(circle at 95% 10%, rgba(23, 105, 170, .09), transparent 30%),
    linear-gradient(180deg, #f9fbff 0%, var(--bg) 100%);
  min-height: 100vh;
}

.portal-shell { padding: 2rem 0 3rem; }

.portal-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 16px;
  box-shadow: 0 10px 35px rgba(24, 43, 75, .08);
  overflow: hidden;
}

.portal-head {
  background: linear-gradient(120deg, var(--brand), var(--brand-2));
  color: #fff;
  padding: 1rem 1.25rem;
}

.portal-head h4, .portal-head h5 { margin: 0; font-weight: 700; letter-spacing: .2px; }

.portal-body-wrap { padding: 1.25rem; }

.form-control, .form-select {
  border-radius: 10px;
  border-color: var(--line);
  padding-top: .58rem;
  padding-bottom: .58rem;
}

.form-control:focus, .form-select:focus {
  border-color: var(--brand-2);
  box-shadow: 0 0 0 .2rem rgba(23, 105, 170, .14);
}

.btn {
  border-radius: 10px;
  font-weight: 600;
}

.btn-primary {
  background: linear-gradient(120deg, var(--brand), var(--brand-2));
  border: 0;
}

.btn-primary:hover { filter: brightness(1.06); }

.soft-note {
  background: #eef5fc;
  border: 1px solid #d1e3f5;
  color: #214a74;
  padding: .65rem .8rem;
  border-radius: 10px;
}

.choice-row {
  background: #f9fbfe;
  border: 1px dashed #d3ddec;
  border-radius: 12px;
  padding: .6rem;
}

.top-actions { display: flex; gap: .5rem; flex-wrap: wrap; }

/* 移动端优化 */
@media (max-width: 768px) {
  .portal-shell { padding: 1rem 0.5rem 2rem; }
  .portal-body-wrap { padding: 1rem; }
  .portal-head { padding: 0.875rem 1rem; }
  .portal-head h4, .portal-head h5 { font-size: 1.1rem; }
  
  /* 表单元素在移动端更好的触摸体验 */
  .form-control, .form-select {
    font-size: 16px; /* 防止 iOS 缩放 */
    min-height: 44px; /* 更好的触摸目标 */
  }
  
  /* 按钮在移动端更好的触摸体验 */
  .btn {
    min-height: 44px;
    padding: 0.625rem 1rem;
  }
  
  /* 志愿选择行在移动端垂直排列 */
  .choice-row {
    padding: 0.75rem;
  }
  .choice-row .col-md-2,
  .choice-row .col-md-3,
  .choice-row .col-md-4 {
    margin-bottom: 0.5rem;
  }
}

/* 小屏幕手机额外优化 */
@media (max-width: 576px) {
  .portal-card {
    border-radius: 12px;
    margin: 0 -0.25rem;
  }
  
  .form-label {
    font-size: 0.875rem;
    margin-bottom: 0.375rem;
  }
  
  /* 输入框组在移动端垂直排列 */
  .input-group {
    flex-direction: column;
  }
  .input-group > .form-control,
  .input-group > .form-select {
    width: 100%;
    border-radius: 10px !important;
  }
  .input-group > .input-group-text {
    width: 100%;
    justify-content: center;
    border-radius: 10px;
    margin-top: 0.25rem;
  }
  
  /* 日期选择器在移动端调整 */
  #graduation_time_picker {
    width: 100% !important;
    height: 44px !important;
    opacity: 0;
    position: absolute;
    top: 0;
    left: 0;
  }
  
  /* 考试地点选择器在移动端优化 */
  .exam-location-group {
    flex-wrap: wrap;
    gap: 0.5rem;
  }
  .exam-location-group .form-select,
  .exam-location-group .form-control {
    width: 100%;
    max-width: none;
    border-radius: 10px;
  }
  .exam-location-group #exam_city {
    flex: 1 1 100%;
  }
  .exam-location-group #exam_district {
    flex: 1 1 100%;
  }
}