body {
  margin: 0;
  padding: 0;
  background: #f5f6fa;
  font-family: Arial, "Microsoft YaHei";
}


.page-wrap {
  display: flex;
  max-width: 1200px;
  margin: 0 auto;
  gap: 20px;
}

.main-left {
  flex: 1;
  min-width: 0;
}

.main-right {
  width: 260px;
  border-radius: 8px;
  padding: 15px;
  box-sizing: border-box;
  position: sticky;
  top: 20px;
  height: fit-content;
}

/* 可选：让侧栏更像卡片 */
.main-right {
  position: sticky;
  top: 20px;
  height: fit-content;
}

.paper-container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 20px;
  font-family: "Microsoft YaHei", sans-serif;
}

/*
   面包屑
 */
.breadcrumb {
  font-size: 14px;
  color: #666;
  margin-bottom: 15px;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
}

.breadcrumb a {
  color: #409eff;
  text-decoration: none;
}

.breadcrumb .sep {
  color: #bbb;
}

.breadcrumb .current {
  color: #333;
}

/* 
   工具栏
    */
.tool-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: linear-gradient(180deg, #f8fbff, #f2f7ff);
  border: 1px solid #e6eefc;
  padding: 12px 16px;
  border-radius: 12px;
  margin-bottom: 20px;
}

.timer {
  font-size: 14px;
}

#time {
  font-weight: bold;
  color: #409eff;
}

.question-count {
  font-size: 14px;
  color: #333;
  display: flex;
  align-items: center;
  gap: 6px;
}

.question-count select {
  padding: 6px 10px;
  border-radius: 8px;
  border: 1px solid #dcdfe6;
  background: #fff;
  outline: none;
  cursor: pointer;
  transition: all 0.2s ease;
}

.question-count select:focus {
  border-color: #409eff;
  box-shadow: 0 0 0 2px rgba(64,158,255,0.15);
}

/* 
   题目区域（做题页）
 */
.question-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 15px;
}

.item {
  background: #fff;
  border: 1px solid #eef2f7;
  border-radius: 14px;
  padding: 18px 20px;
  display: flex;
  align-items: center;
  gap: 10px;
   justify-content: center; 
}

.q {
  font-size: 18px;
  font-weight: 600;
}

.q-no {
  color: #409eff;
  margin-right: 20px;
}

.answer-box input {
  width: 60px;
  padding: 8px;
  border: 1px solid #dcdfe6;
  border-radius: 8px;
}

.result-bar {
  margin-top: 20px;
  padding: 12px 16px;
  background: #eaf7ff;
  border: 1px solid #d6ecff;
  border-radius: 10px;

  display: flex;
  justify-content: center;
  gap: 20px;

  font-size: 14px;
  color: #333;
}

.result-bar span {
  font-weight: bold;
}

.right-count {
  color: #22c55e;
}

.wrong-count {
  color: #ef4444;
}

/* 
   按钮区
*/
.action-bar {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin: 20px 0;
}

.btn-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
      margin-top: 15px;
}

.btn {
  padding: 10px 18px;
  border: none;
  border-radius: 8px;
  cursor: pointer;
}

.btn.submit { background: #22c55e; color: #fff; }
.btn.reload { background: #3b82f6; color: #fff; }
.btn.print { background: #64748b; color: #fff; }
.btn.download { background: #f59e0b; color: #fff; }

/*
   推荐区
 */
.recommend {
  margin: 30px auto;
  max-width: 900px;
}

.recommend ul {
  list-style: none;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.recommend li {
  padding: 12px;
  border: 1px solid #eee;
  border-radius: 10px;
  background: #fafafa;
  cursor: pointer;
}

/*
   试卷区域（打印用）
 */

#paper {
display: none; 
}

.no-print {
  margin: 10px;
}

.page-break {
  page-break-after: always;
  break-after: page;
}

.result {
  margin-left: 6px;
  font-size: 16px;
  font-weight: bold;
}

.result.right {
  color: #16a34a;   /* 绿色 */
}

.result.wrong {
  color: #dc2626;   /* 红色 */
}

/* ===== 右侧卡片统一样式 ===== */
.side-card {
  background: #ffffff;
  border-radius: 10px;
  padding: 12px 15px;
  margin-bottom: 15px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.05);
}

/* 标题 */
.side-title {
  font-size: 15px;
  font-weight: bold;
  margin-top: 0;
  margin-bottom: 12px;
  color: #333;
  border-left: 4px solid #4caf50;
  padding-left: 8px;
}

/* 内容文字 */
.side-content {
 margin-top: 0;
  font-size: 13px;
  color: #666;
  line-height: 1.6;
}

/* ===== 二维码 ===== */
.qr-wrap {
  text-align: center;
}

.qr-code {
  width: 120px;
  height: 120px;
  margin: 0 auto 8px;
  border-radius: 8px;   /* ⭐稍微圆角 */
  overflow: hidden;
  background: #f5f5f5;
}

.qr-text {
  font-size: 12px;
  color: #888;
}

/* 标题和按钮之间留距离 */
.side-card .side-title {
  margin-bottom: 12px;
}

/* 按钮居中 */
.download-btn {
  display: block;
  width: 100%;
  padding: 10px 16px;   /* ⭐左右加大空间 */
  background: #4caf50;
  color: #fff;
  text-align: center;
  border-radius: 6px;
  font-size: 14px;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.2s;
  box-sizing: border-box;
}

/* hover效果 */
.download-btn:hover {
  background: #43a047;
}

/* ===== 年级列表 ===== */
.grade-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.grade-list a {
  flex: 1 1 calc(50% - 8px);
  text-align: center;
  background: #f1f8f4;
  padding: 6px 0;
  border-radius: 6px;
  font-size: 13px;
  color: #2e7d32;
  text-decoration: none;
  transition: all 0.2s;
}

.grade-list a:hover {
  background: #c8e6c9;
}

/* ===== 同类练习 ===== */
.side-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.side-list li {
  margin-bottom: 6px;
}

.side-list a {
  font-size: 13px;
  color: #333;
  text-decoration: none;
  transition: all 0.2s;
}

.side-list a:hover {
  color: #4caf50;
}

.tool-right {
  display: flex;
  align-items: center;
  gap: 10px;
}

/* 复制按钮 */
.copy-link-btn {
  padding: 6px 10px;
  font-size: 13px;
  background: #f5f5f5;
  border: 1px solid #ddd;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.2s;
  white-space: nowrap;
}

.copy-link-btn:hover {
  background: #e8f5e9;
  border-color: #4caf50;
  color: #4caf50;
}
.copy-link-btn.copied {
  background: #4caf50;
  border-color: #4caf50;
  color: #fff;
}

.recommend ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.recommend li {
  margin-bottom: 6px;
}

.recommend a {
  display: block;
  padding: 8px 10px;
  background: #f5f7fa;
  border-radius: 6px;
  font-size: 13px;
  color: #333;
  text-decoration: none;
  transition: all 0.2s;
}

.recommend a:hover {
  background: #e8f5e9;
  color: #4caf50;
}


/* 
   响应式
 */
@media (max-width: 768px) {
  .question-grid {
    grid-template-columns: 1fr;
  }

  .recommend ul {
    grid-template-columns: 1fr;
  }

  .item {
    flex-direction: column;
    align-items: flex-start;
  }

  .q {
    font-size: 16px;
  }
}
@media (max-width: 768px) {
  .item {
    flex-direction: row !important;
    align-items: center !important;
  }

  .q {
    display: inline;
  }

  .answer-box {
    display: inline-block;
    margin-left: 6px;
  }

  .answer-box input {
    width: 60px;
  }
}


@media (max-width: 768px) {

  .page-wrap {
    display: block;        /* ⭐直接变单列（关键） */
    padding: 0 10px;
  }

  .main-left {
    width: 100%;
  }

  .main-right {
    width: 100%;
    margin-top: 15px;      /* ⭐自然接在内容后面 */
    position: static;      /* ⭐取消吸附 */
  }
    /* 隐藏“题数：”文字 */
  .question-count {
    font-size: 0;
  }

  /* 但保留 select 正常显示 */
  .question-count select {
    font-size: 14px;
  }

}


/* ===== 手机端优化 ===== */
@media (max-width: 768px) {

  /* 卡片间距更紧凑 */
  .side-card {
    padding: 12px;
    margin-bottom: 12px;
    border-radius: 8px;
  }

  /* 标题稍微缩小 */
  .side-title {
    font-size: 14px;
  }

  /* 内容文字 */
  .side-content {
    font-size: 13px;
  }

  /* ===== 二维码 ===== */
  .qr-code {
    width: 120px;
    height: 120px;
  }

  .qr-text {
    font-size: 12px;
  }

  /* ===== 下载按钮 ===== */
  .download-btn {
    font-size: 14px;
    padding: 10px 0;
  }

  /* ===== 年级按钮（一行2个，手机更舒服） ===== */
  .grade-list a {
    flex: 1 1 calc(50% - 6px);
    font-size: 13px;
    padding: 8px 0;
  }

  /* ===== 同类练习 ===== */
  .side-list a {
    font-size: 13px;
  }

}

@media (max-width: 768px) {

  .tool-bar {
    padding: 12px 10px;   /* ⭐左右加宽一点 */
    border-radius: 10px;
  }

  .tool-left,
  .tool-right {
    flex: 1;
  }

  .tool-left {
    padding-right: 6px;
  }

  .tool-right {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
  }

  /* 防止内部元素挤压 */
  .question-count select {
    max-width: 100px;
  }

  .copy-link-btn {
    padding: 6px 8px;
    font-size: 12px;
  }
}