/* ----- 全局柔和风格，护眼留白 ----- */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

/* 引入 Font Awesome 图标库 */
@import url('https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.0.0-beta3/css/all.min.css');

body {
  font-family: 'Segoe UI', '微软雅黑', 'PingFang SC', system-ui, sans-serif;
  background: #f9f7f3;
  color: #2e3b3b;
  line-height: 1.5;
  padding: 20px;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.app-container {
  max-width: 1400px;
  width: 100%;
  background: rgba(255, 255, 245, 0.8);
  backdrop-filter: blur(2px);
  border-radius: 36px;
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.05);
  padding: 24px 28px;
  border: 1px solid #ece8e0;
  position: relative;
}

/* 返回首页按钮 */
.back-home-btn {
  position: absolute;
  top: 1rem;
  left: 1rem;
  display: flex;
  align-items: center;
  gap: 6px;
  background: linear-gradient(135deg, #b3cfc1 0%, #7fa392 100%);
  color: white;
  text-decoration: none;
  padding: 8px 16px;
  border-radius: 20px;
  font-size: 0.9rem;
  font-weight: 500;
  transition: all 0.3s ease;
  box-shadow: 0 2px 8px rgba(127, 163, 146, 0.3);
  z-index: 100;
}

.back-home-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(127, 163, 146, 0.5);
}

.back-home-btn i {
  font-size: 1rem;
}

h1 {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 500;
  font-size: 2.2rem;
  color: #4a6a5e;
  margin-bottom: 16px;
  letter-spacing: 1px;
  border-bottom: 3px dashed #c9d6cf;
  padding-bottom: 16px;
  padding-top: 40px;
}
h1 span {
  background: #e1d9c7;
  padding: 4px 16px;
  border-radius: 60px;
  font-size: 1rem;
  color: #3e5a4f;
}

/* 控制面板 */
.config-panel {
  background: #ffffffd6;
  border-radius: 28px;
  padding: 20px 24px;
  margin-bottom: 30px;
  box-shadow: 0 4px 10px rgba(0,0,0,0.02);
  border: 1px solid #e4dfd6;
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: 20px 30px;
}

.param-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.param-group label {
  font-size: 0.9rem;
  font-weight: 600;
  color: #5b6e64;
}
.param-group input[type="number"] {
  width: 110px;
  padding: 10px 12px;
  border: 1.5px solid #d4cdc0;
  border-radius: 40px;
  font-size: 1rem;
  background: white;
  transition: 0.2s;
}
.param-group input:focus {
  border-color: #8aa79b;
  outline: none;
  box-shadow: 0 0 0 3px rgba(138,167,155,0.2);
}

.checkbox-group {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 18px;
  background: linear-gradient(135deg, #f9f6f0 0%, #f4f0e9 100%);
  padding: 18px 24px 14px 24px;
  border-radius: 48px;
  border: 2px solid #c9b896;
  box-shadow: 0 3px 8px rgba(0, 0, 0, 0.08), inset 0 1px 2px rgba(255, 255, 255, 0.8);
  position: relative;
  margin-top: 8px;
}
.checkbox-group::before {
  content: "⚙️ 选项设置";
  position: absolute;
  top: -12px;
  left: 20px;
  background: white;
  padding: 2px 12px;
  border-radius: 12px;
  font-size: 0.85rem;
  font-weight: 700;
  color: #5a8f72;
  border: 2px solid #c9b896;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}
.checkbox-group label {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  font-weight: 600;
  color: #2c3e35;
  font-size: 1.05rem;
  padding: 6px 12px;
  border-radius: 24px;
  transition: all 0.2s ease;
  background: rgba(255, 255, 255, 0.5);
  border: 2px solid transparent;
}
.checkbox-group label:hover {
  background: rgba(127, 163, 146, 0.15);
  transform: translateY(-1px);
  border-color: rgba(127, 163, 146, 0.3);
}
.checkbox-group input[type="checkbox"]:checked + span,
.checkbox-group label:has(input[type="checkbox"]:checked) {
  background: rgba(90, 143, 114, 0.2);
  border-color: #5a8f72;
  color: #1e3a2f;
}
.checkbox-group input[type="checkbox"] {
  width: 22px;
  height: 22px;
  accent-color: #5a8f72;
  cursor: pointer;
  border: 2px solid #7fa392;
  border-radius: 4px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  transition: all 0.2s ease;
  flex-shrink: 0;
}
.checkbox-group input[type="checkbox"]:checked {
  background-color: #5a8f72;
  border-color: #4a7a62;
  box-shadow: 0 2px 6px rgba(90, 143, 114, 0.4);
  transform: scale(1.1);
}
.checkbox-group input[type="checkbox"]:hover {
  border-color: #5a8f72;
  box-shadow: 0 3px 8px rgba(90, 143, 114, 0.3);
  transform: scale(1.05);
}

.action-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-left: auto;
}
.btn {
  background: #e6e1d6;
  border: none;
  padding: 12px 24px;
  border-radius: 60px;
  font-size: 1rem;
  font-weight: 600;
  color: #2e4a3f;
  cursor: pointer;
  box-shadow: 0 3px 0 #c0b7a8;
  transition: all 0.15s;
  border: 1px solid #d6cfc2;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.btn-primary {
  background: #b3cfc1;
  box-shadow: 0 3px 0 #7f9a8b;
  border-color: #9bb9a8;
  color: #1f3a2f;
}
.btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 0 #a59b8c;
  background: #ede8dd;
}
.btn-primary:hover {
  background: #c2dfd0;
}
.btn:active {
  transform: translateY(2px);
  box-shadow: 0 1px 0 #a59b8c;
}

/* 内容区：两列布局 */
.content-panels {
  display: grid;
  grid-template-columns: 1fr 450px;
  gap: 28px;
  margin-top: 10px;
}
@media (max-width: 1000px) {
  .content-panels {
    grid-template-columns: 1fr 380px;
  }
}
@media (max-width: 800px) {
  .content-panels {
    grid-template-columns: 1fr;
    gap: 30px;
  }
}

.paper-card {
  background: #fffcf8;
  border-radius: 28px;
  padding: 24px 28px;
  box-shadow: inset 0 1px 3px rgba(255,255,255,0.9), 0 8px 18px rgba(0,0,0,0.03);
  border: 1px solid #e5dbce;
  position: relative;
}

/* 试卷装饰线 */
.paper-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 30px;
  right: 30px;
  height: 2px;
  background: linear-gradient(to right, transparent, #d4c5b0, transparent);
}

/* 试卷头部样式 */
.exam-header {
  margin-bottom: 25px;
  padding-bottom: 20px;
  border-bottom: 3px double #4a6a5e;
  position: relative;
}

.exam-title {
  font-size: 2rem;
  font-weight: 700;
  color: #2c3e35;
  text-align: center;
  margin-bottom: 20px;
  letter-spacing: 3px;
  font-family: 'SimSun', 'STSong', serif;
}

.exam-info {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 0 20px;
}

.info-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 15px;
}

.info-item {
  font-size: 1.1rem;
  color: #3e5a4f;
  font-weight: 500;
  display: flex;
  align-items: baseline;
  gap: 5px;
  font-family: 'SimSun', 'STSong', serif;
}

.underline-blank {
  display: inline-block;
  min-width: 120px;
  border-bottom: 1.5px solid #2c3e35;
  margin-left: 5px;
}

.underline-blank.short {
  min-width: 80px;
}

.section-title {
  font-size: 1.7rem;
  font-weight: 500;
  color: #476b5c;
  margin-bottom: 20px;
}

.question-list {
  list-style: none;
  counter-reset: question-counter;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px 25px;
  padding: 15px 0;
}
@media (max-width: 1000px) {
  .question-list {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 600px) {
  .question-list {
    grid-template-columns: 1fr;
  }
}
.question-item {
  counter-increment: question-counter;
  margin-bottom: 0;
  font-size: 1.25rem;
  font-weight: 500;
  display: flex;
  align-items: baseline;
  border-bottom: 1px dotted #bbb;
  padding-bottom: 8px;
  min-height: 42px;
  font-family: 'Times New Roman', 'SimSun', serif;
  line-height: 1.6;
}
.question-item::before {
  content: counter(question-counter) ".";
  font-weight: 600;
  color: #2c3e35;
  width: 2.2em;
  font-size: 1.25rem;
  margin-right: 8px;
  text-align: right;
  font-family: 'Times New Roman', serif;
}
.question-text {
  flex: 1;
  letter-spacing: 0.5px;
  word-break: break-word;
  white-space: nowrap;
  overflow: visible;
  text-overflow: clip;
}
.answer-blank {
  display: inline-block;
  min-width: 80px;
  border-bottom: 1.5px solid #2c3e35;
  margin-left: 10px;
  vertical-align: bottom;
}

.answer-card {
  background: #f6f3eb;
  border-radius: 28px;
  padding: 24px 22px;
  border: 1px solid #ddd2c0;
  box-shadow: 0 4px 12px rgba(0,0,0,0.02);
  overflow: hidden;
}
.answer-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 18px;
  padding-bottom: 15px;
  border-bottom: 2px solid #7e9a8b;
}
.answer-list {
  list-style: none;
  counter-reset: answer-counter;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px 18px;
}
@media (max-width: 1000px) {
  .answer-list {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 600px) {
  .answer-list {
    grid-template-columns: 1fr;
  }
}
.answer-item {
  counter-increment: answer-counter;
  padding: 6px 4px;
  border-bottom: 1px dashed #cbbfb0;
  font-size: 1.1rem;
  display: flex;
  align-items: baseline;
  min-width: 0;
  font-family: 'Times New Roman', 'SimSun', serif;
}
.answer-item::before {
  content: counter(answer-counter) ".";
  font-weight: 600;
  color: #2c3e35;
  width: 2em;
  margin-right: 6px;
  text-align: right;
  font-family: 'Times New Roman', serif;
}
.answer-value {
  font-weight: 700;
  color: #1e4a3a;
  background: transparent;
  padding: 2px 6px;
  margin-left: 4px;
  white-space: nowrap;
  font-size: 1.1rem;
}

.empty-msg {
  color: #8e9b91;
  font-size: 1.2rem;
  text-align: center;
  padding: 30px;
}

.toolbar {
  display: flex;
  gap: 16px;
  margin: 20px 0 10px;
}

/* 答案隐藏状态 */
.answer-card.answer-hidden .answer-list,
.answer-card.answer-hidden .answer-header .section-title {
  display: none;
}
.answer-card.answer-hidden .answer-header::after {
  content: "🔒 答案已隐藏";
  font-size: 1.1rem;
  color: #8f9e92;
}

/* 打印样式 */
@page {
  size: A4;
  margin: 1.5cm;
}

@media print {
  body {
    background: white;
    padding: 0;
    -webkit-print-color-adjust: exact;
    print-color-adjust: exact;
  }
  .app-container {
    box-shadow: none;
    border-radius: 0;
    padding: 0;
    background: white;
    max-width: 100%;
  }
  h1, .config-panel, .toolbar, .no-print, .action-buttons, .btn, .back-home-btn {
    display: none !important;
  }
  .content-panels {
    display: grid !important;
    grid-template-columns: 1fr 450px !important;
    gap: 28px !important;
    margin-top: 0 !important;
  }
  body.print-paper .content-panels {
    grid-template-columns: 1fr !important;
  }
  body.print-answer .content-panels {
    grid-template-columns: 1fr !important;
  }
  .paper-card, .answer-card {
    box-shadow: none;
    border: none;
    padding: 10px 0;
    background: white;
    border-radius: 0;
  }
  body.print-paper .answer-card,
  body.print-paper .answer-section {
    display: none !important;
  }
  body.print-answer .paper-card,
  body.print-answer .quiz-section {
    display: none !important;
  }
  
  /* 试卷头部打印样式 */
  .exam-header {
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 2px double #000;
    position: relative;
  }
  .exam-header::before {
    content: "密封线内不要答题";
    position: absolute;
    left: -60px;
    top: 50%;
    transform: translateY(-50%) rotate(-90deg);
    font-size: 9pt;
    color: #666;
    letter-spacing: 2px;
    white-space: nowrap;
  }
  .exam-title {
    font-size: 18pt;
    font-weight: 700;
    color: #000;
    margin-bottom: 15px;
    letter-spacing: 2px;
  }
  .exam-info {
    padding: 0 10px;
  }
  .info-item {
    font-size: 11pt;
    color: #000;
  }
  .underline-blank {
    border-bottom: 1px solid #000;
  }
  
  .section-title {
    font-size: 16pt;
    margin-bottom: 15px;
  }
  
  /* 题目打印样式 - 3列布局 */
  .question-item {
    border-bottom: 1px dotted #666;
    font-size: 11pt;
    page-break-inside: avoid;
    min-height: 35px;
    padding-bottom: 6px;
    line-height: 1.5;
    color: #000;
  }
  .question-item::before {
    font-size: 11pt;
    width: 2em;
    color: #000;
    font-weight: 700;
  }
  .question-text {
    white-space: nowrap;
    overflow: visible;
    text-overflow: clip;
    font-size: 11pt;
    color: #000;
  }
  .question-list {
    display: grid !important;
    grid-template-columns: repeat(3, 1fr) !important;
    gap: 10px 15px !important;
    padding: 10px 0;
  }
  body.print-paper .question-list {
    grid-template-columns: repeat(3, 1fr) !important;
  }
  .answer-blank {
    border-bottom: 1.5px solid #000;
    min-width: 70px;
  }
  
  /* 答案打印样式 - 3列布局 */
  .answer-item {
    font-size: 11pt;
    page-break-inside: avoid;
    padding: 5px 3px;
    border-bottom: 1px dashed #666;
    color: #000;
  }
  .answer-item::before {
    width: 1.8em;
    font-size: 11pt;
    color: #000;
    font-weight: 700;
  }
  .answer-list {
    display: grid !important;
    grid-template-columns: repeat(3, 1fr) !important;
    gap: 10px 15px !important;
  }
  body.print-answer .answer-list {
    grid-template-columns: repeat(3, 1fr) !important;
  }
  .answer-value {
    padding: 2px 5px;
    font-size: 11pt;
    background: transparent;
    color: #000;
    font-weight: 700;
  }
}

@media (max-width: 500px) {
  .app-container { padding: 16px; }
  .config-panel { flex-direction: column; align-items: stretch; }
  .action-buttons { margin-left: 0; }
  .question-item { font-size: 1.1rem; }
  .exam-title { font-size: 1.5rem; letter-spacing: 2px; }
  .exam-info { padding: 0 10px; }
  .info-item { font-size: 0.95rem; }
  .underline-blank { min-width: 80px; }
  .underline-blank.short { min-width: 60px; }
  .checkbox-group {
    padding: 16px 16px 12px 16px;
    gap: 12px;
  }
  .checkbox-group label {
    font-size: 0.95rem;
    padding: 5px 10px;
  }
  .checkbox-group input[type="checkbox"] {
    width: 20px;
    height: 20px;
  }
}