/* ============================================================
   BoneGuard 模块样式（第二阶段：适老化首页）
   约定：
   1. 所有规则都限定在 .bg-app 之内，不影响主应用其他区域；
   2. 所有类名以 bg- 开头，CSS 变量以 --bg- 开头；
   3. 颜色、字号、间距集中在变量里，方便后续统一调整。
   ============================================================ */

.bg-app {
  /* 底色与文字 */
  --bg-page: #ffffff;
  --bg-ink: #1f2d3a;
  --bg-ink-soft: #4b5c6b;
  --bg-ink-faint: #6e7f8e;

  /* 主题色：深蓝用于标题与专业信息，青绿用于主要操作 */
  --bg-title: #12395c;
  --bg-brand: #17806a;
  --bg-brand-deep: #0f6a57;
  --bg-brand-soft: #e9f6f1;
  --bg-blue-soft: #eef4fb;

  /* 线条与状态色 */
  --bg-line: #d5e0ea;
  --bg-line-strong: #b9cad9;
  --bg-danger: #b3352c;

  /* 尺寸 */
  --bg-radius-md: 12px;
  --bg-radius-lg: 16px;
  --bg-max-width: 980px;

  box-sizing: border-box;
  background: var(--bg-page);
  color: var(--bg-ink);
  font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", system-ui, -apple-system, sans-serif;
  font-size: 18px;
  line-height: 1.75;
  overflow-wrap: break-word;
  word-break: break-word;
  -webkit-text-size-adjust: 100%;
  -webkit-tap-highlight-color: rgba(23, 128, 106, 0.12);
}

.bg-app *,
.bg-app *::before,
.bg-app *::after {
  box-sizing: inherit;
}

/* 仅独立页面使用：让底色铺满整屏。嵌入主应用时不生效。 */
.bg-standalone.bg-app {
  min-height: 100vh;
}

/* ---------- 布局骨架 ---------- */

.bg-shell {
  width: 100%;
  max-width: var(--bg-max-width);
  margin: 0 auto;
  padding: 24px 20px 48px;
}

.bg-view,
.bg-main {
  width: 100%;
}

/* ---------- 图标 ---------- */

.bg-icon {
  display: block;
  width: 24px;
  height: 24px;
}

/* ---------- 区域一：顶部标题 ---------- */

.bg-hero {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin: 4px 0 24px;
}

.bg-hero-badge {
  flex: none;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  border-radius: 16px;
  background: var(--bg-brand-soft);
  color: var(--bg-brand-deep);
}

.bg-hero-badge .bg-icon {
  width: 28px;
  height: 28px;
}

.bg-hero-text {
  min-width: 0;
}

.bg-title {
  margin: 0;
  font-size: 26px;
  font-weight: 600;
  line-height: 1.35;
  letter-spacing: 0.01em;
  color: var(--bg-title);
}

/* 标题只是切页后接收焦点，不需要画焦点框 */
.bg-title:focus,
.bg-title:focus-visible {
  outline: none;
}

.bg-subtitle {
  margin: 2px 0 0;
  font-size: 16px;
  font-weight: 400;
  letter-spacing: 0.14em;
  color: var(--bg-ink-faint);
}

.bg-hero-desc {
  margin: 10px 0 0;
  font-size: 18px;
  line-height: 1.75;
  color: var(--bg-ink-soft);
}

/* ---------- 卡片通用 ---------- */

.bg-card {
  margin: 0 0 18px;
  padding: 22px 20px;
  border: 1px solid var(--bg-line);
  border-radius: var(--bg-radius-lg);
  background: #ffffff;
}

.bg-card--blue {
  background: var(--bg-blue-soft);
  border-color: #dbe7f4;
}

.bg-card--teal {
  background: var(--bg-brand-soft);
  border-color: #cfe8df;
}

.bg-card-title {
  margin: 0;
  font-size: 21px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--bg-title);
}

.bg-card-desc {
  margin: 8px 0 0;
  font-size: 18px;
  line-height: 1.7;
  color: var(--bg-ink-soft);
}

.bg-card-head {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.bg-card-icon {
  flex: none;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: #ffffff;
  color: var(--bg-brand-deep);
}

.bg-card-headtext {
  min-width: 0;
}

/* ---------- 输入区 ---------- */

.bg-query-row {
  margin: 18px 0 0;
}

.bg-field {
  position: relative;
}

.bg-field-icon {
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  align-items: center;
  color: #7f8fa0;
  pointer-events: none;
}

.bg-field-icon .bg-icon {
  width: 22px;
  height: 22px;
}

.bg-input {
  display: block;
  width: 100%;
  min-height: 58px;
  padding: 12px 16px 12px 50px;
  border: 2px solid #cbdae8;
  border-radius: var(--bg-radius-md);
  background: #ffffff;
  color: var(--bg-ink);
  font-family: inherit;
  font-size: 18px;
  line-height: 1.5;
  appearance: none;
  -webkit-appearance: none;
}

.bg-input::placeholder {
  color: #8b9aa8;
}

.bg-input:focus {
  outline: none;
  border-color: var(--bg-brand);
  box-shadow: 0 0 0 3px rgba(23, 128, 106, 0.18);
}

/* 出错时只变色，不改变高度，避免页面跳动 */
.bg-field--error .bg-input {
  border-color: var(--bg-danger);
}

/* 出错且输入框处于焦点时，光圈也跟着变红，避免青绿+红色同时出现 */
.bg-field--error .bg-input:focus {
  border-color: var(--bg-danger);
  box-shadow: 0 0 0 3px rgba(179, 53, 44, 0.15);
}

.bg-field--error .bg-field-icon {
  color: var(--bg-danger);
}

.bg-field-msg {
  min-height: 26px;
  margin: 6px 0 0;
  font-size: 16px;
  line-height: 1.6;
  color: var(--bg-danger);
}

.bg-field-msg--error::before {
  content: "！";
  display: inline-block;
  margin-right: 4px;
  font-weight: 600;
}

/* ---------- 按钮 ---------- */

.bg-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-height: 56px;
  padding: 14px 22px;
  border: 1px solid var(--bg-line-strong);
  border-radius: var(--bg-radius-md);
  background: #ffffff;
  color: var(--bg-title);
  font-family: inherit;
  font-size: 19px;
  font-weight: 600;
  line-height: 1.4;
  text-align: center;
  cursor: pointer;
  touch-action: manipulation;
  transition: background-color 0.12s ease, border-color 0.12s ease;
}

.bg-btn:hover {
  border-color: #9fb4c6;
}

.bg-btn--primary {
  border-color: var(--bg-brand);
  background: var(--bg-brand);
  color: #ffffff;
}

.bg-btn--primary:hover {
  border-color: var(--bg-brand-deep);
  background: var(--bg-brand-deep);
}

.bg-btn--primary:active {
  background: var(--bg-brand-deep);
}

.bg-btn--block {
  margin-top: 14px;
}

.bg-btn:focus-visible,
.bg-back:focus-visible,
.bg-input:focus-visible {
  outline: 3px solid rgba(23, 128, 106, 0.55);
  outline-offset: 2px;
}

/* ---------- 区域四：功能说明 ---------- */

.bg-features {
  margin: 30px 0 0;
}

.bg-section-title {
  margin: 0 0 14px;
  font-size: 21px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--bg-title);
}

.bg-feature-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.bg-feature {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px;
  border: 1px solid #e2ebf3;
  border-radius: 14px;
  background: #f7fafc;
}

.bg-feature-icon {
  flex: none;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: #e6f1f9;
  color: #2b6b93;
}

.bg-feature-icon .bg-icon {
  width: 22px;
  height: 22px;
}

.bg-feature-text {
  min-width: 0;
}

.bg-feature-title {
  margin: 0 0 2px;
  font-size: 19px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--bg-title);
}

.bg-feature-desc {
  margin: 0;
  font-size: 17px;
  line-height: 1.65;
  color: var(--bg-ink-soft);
}

/* ---------- 区域五：免责声明 ---------- */

.bg-disclaimer {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin: 24px 0 0;
  padding: 16px 18px;
  border: 1px solid #e1eaf2;
  border-radius: 14px;
  background: #f2f6fa;
  color: #56697a;
  font-size: 16px;
  line-height: 1.7;
}

.bg-disclaimer-icon {
  flex: none;
  display: flex;
  align-items: center;
  margin-top: 2px;
  color: #6b8aa5;
}

.bg-disclaimer-icon .bg-icon {
  width: 20px;
  height: 20px;
}

/* ---------- 其他页面沿用 ---------- */

.bg-header {
  margin: 0 0 20px;
}

.bg-back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 52px;
  padding: 0 20px 0 14px;
  margin: 0 0 16px;
  border: 1px solid var(--bg-line-strong);
  border-radius: 999px;
  background: #ffffff;
  color: var(--bg-title);
  font-family: inherit;
  font-size: 18px;
  cursor: pointer;
}

.bg-back .bg-icon {
  width: 20px;
  height: 20px;
}

.bg-drug-name {
  margin: 12px 0 0;
  padding: 14px 16px;
  border-radius: var(--bg-radius-md);
  background: var(--bg-blue-soft);
  color: var(--bg-title);
  font-size: 22px;
  font-weight: 600;
  line-height: 1.5;
}

.bg-placeholder {
  margin: 12px 0 0;
  padding: 18px 16px;
  border: 1px dashed var(--bg-line-strong);
  border-radius: var(--bg-radius-md);
  background: #fbfcfd;
  color: var(--bg-ink-faint);
  font-size: 18px;
  text-align: center;
}

.bg-placeholder--tall {
  padding: 30px 16px;
}

.bg-note {
  margin: 0 0 8px;
  padding: 16px 18px;
  border-left: 4px solid #a9c4bb;
  border-radius: var(--bg-radius-md);
  background: var(--bg-brand-soft);
  color: var(--bg-ink-soft);
  font-size: 18px;
  line-height: 1.75;
}

.bg-footer-actions {
  margin: 24px 0 0;
}

/* ---------- 电脑端 ---------- */

@media (min-width: 720px) {
  .bg-shell {
    padding: 44px 32px 64px;
  }

  .bg-hero {
    gap: 18px;
    margin-bottom: 28px;
  }

  .bg-hero-badge {
    width: 64px;
    height: 64px;
    border-radius: 18px;
  }

  .bg-hero-badge .bg-icon {
    width: 34px;
    height: 34px;
  }

  .bg-title {
    font-size: 30px;
  }

  .bg-card {
    padding: 26px;
  }

  .bg-card-title {
    font-size: 22px;
  }

  .bg-feature-list {
    grid-template-columns: repeat(3, 1fr);
    gap: 14px;
  }

  .bg-feature {
    flex-direction: column;
    gap: 10px;
  }

  /* 电脑端：输入框与按钮同一行，避免按钮被拉得过长 */
  .bg-query-row {
    display: flex;
    align-items: flex-start;
    gap: 14px;
  }

  .bg-field-block {
    flex: 1 1 auto;
    min-width: 0;
  }

  .bg-query-row .bg-btn--block {
    flex: none;
    width: auto;
    min-width: 220px;
    margin-top: 0;
  }
}

/* ---------- 第三阶段：检索结果 ---------- */

/* 只给读屏软件看，视觉上不占位 */
.bg-sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  border: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
}

.bg-results-slot:empty {
  display: none;
}

.bg-results-wrap {
  margin: 20px 0 0;
  padding: 18px 0 0;
  border-top: 1px solid #dbe7f4;
}

.bg-results-title {
  margin: 0;
  font-size: 20px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--bg-title);
}

.bg-results-hint {
  margin: 8px 0 0;
  font-size: 17px;
  line-height: 1.65;
  color: var(--bg-ink-soft);
}

.bg-result-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
}

.bg-result {
  padding: 18px 16px;
  border: 1px solid #d7e4ef;
  border-radius: var(--bg-radius-md);
  background: #ffffff;
}

.bg-result-name {
  margin: 0;
  font-size: 21px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--bg-title);
}

.bg-result-meta {
  margin: 6px 0 0;
  font-size: 17px;
  line-height: 1.65;
  color: var(--bg-ink-soft);
}

/* 「查看详情」用描边样式：多个结果同时出现也不会糊成一片青绿色 */
.bg-result-btn {
  min-height: 52px;
  margin-top: 14px;
  border: 2px solid var(--bg-brand);
  background: #ffffff;
  color: var(--bg-brand-deep);
  font-size: 18px;
}

.bg-result-btn:hover {
  border-color: var(--bg-brand-deep);
  background: var(--bg-brand-soft);
}

.bg-result-btn:active {
  background: #dcefe8;
}

.bg-results-note {
  margin: 14px 0 0;
  font-size: 16px;
  line-height: 1.7;
  color: var(--bg-ink-faint);
}

/* 未找到 / 状态提示 */
.bg-empty {
  margin: 18px 0 0;
  padding: 18px 16px;
  border: 1px solid #e2ebf3;
  border-radius: var(--bg-radius-md);
  background: #f7fafc;
}

.bg-empty-title {
  margin: 0;
  font-size: 19px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--bg-title);
}

.bg-empty-desc {
  margin: 8px 0 0;
  font-size: 17px;
  line-height: 1.7;
  color: var(--bg-ink-soft);
}

/* ---------- 第三阶段：结果页药品信息 ---------- */

.bg-meta {
  margin: 14px 0 0;
  padding: 0;
}

.bg-meta-row {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid #edf2f7;
}

.bg-meta-row:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.bg-meta-label {
  flex: none;
  width: 5em;
  margin: 0;
  font-size: 17px;
  color: var(--bg-ink-faint);
}

.bg-meta-value {
  flex: 1 1 auto;
  min-width: 0;
  margin: 0;
  font-size: 18px;
  color: var(--bg-ink);
}

.bg-desc-text {
  margin: 12px 0 0;
  font-size: 18px;
  line-height: 1.8;
  color: var(--bg-ink);
}

/* ---------- 第四阶段：医学证据卡（组件已备好，第五步接入页面） ---------- */

.bg-ev-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.bg-ev-card {
  padding: 20px 18px;
  border: 1px solid var(--bg-line);
  border-radius: var(--bg-radius-lg);
  background: #ffffff;
}

.bg-ev-card--limited {
  border-style: dashed;
  background: #fbfcfd;
}

.bg-ev-summary {
  margin: 0;
  padding: 14px 16px;
  border-radius: var(--bg-radius-md);
  background: var(--bg-blue-soft);
  color: var(--bg-title);
  font-size: 19px;
  font-weight: 600;
  line-height: 1.7;
}

.bg-ev-source {
  margin: 16px 0 0;
  padding: 14px 16px;
  border-left: 4px solid #b8cfe4;
  background: #f6f9fc;
  border-radius: 0 var(--bg-radius-md) var(--bg-radius-md) 0;
}

.bg-ev-tag {
  display: inline-block;
  padding: 3px 12px;
  border-radius: 999px;
  background: #e3edf7;
  color: #2b6b93;
  font-size: 15px;
  font-weight: 600;
}

.bg-ev-org {
  margin: 10px 0 0;
  font-size: 17px;
  color: var(--bg-ink-soft);
}

.bg-ev-doc {
  margin: 4px 0 0;
  font-size: 17px;
  font-weight: 500;
  line-height: 1.65;
  color: var(--bg-title);
  overflow-wrap: anywhere;
}

.bg-ev-year {
  margin: 4px 0 0;
  font-size: 16px;
  color: var(--bg-ink-faint);
}

.bg-ev-certainty,
.bg-ev-strength {
  margin: 14px 0 0;
  font-size: 17px;
  line-height: 1.7;
  color: var(--bg-ink);
}

.bg-ev-certainty strong,
.bg-ev-strength strong {
  color: var(--bg-title);
}

.bg-ev-strength-note {
  display: block;
  margin-top: 4px;
  font-size: 15px;
  color: var(--bg-ink-faint);
}

.bg-ev-label {
  margin: 0;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--bg-ink-faint);
}

.bg-ev-text {
  margin: 6px 0 0;
  font-size: 17px;
  line-height: 1.75;
  color: var(--bg-ink);
}

.bg-ev-note {
  margin: 8px 0 0;
  font-size: 16px;
  line-height: 1.7;
  color: var(--bg-ink-soft);
}

.bg-ev-applicability,
.bg-ev-limits,
.bg-ev-locate {
  margin: 16px 0 0;
  padding: 14px 16px;
  border: 1px solid #e6edf3;
  border-radius: var(--bg-radius-md);
  background: #fbfcfe;
}

.bg-ev-list {
  margin: 6px 0 0;
  padding-left: 22px;
  font-size: 16px;
  line-height: 1.75;
  color: var(--bg-ink-soft);
  overflow-wrap: anywhere;
}

.bg-ev-fallback-title {
  margin: 0;
  font-size: 19px;
  font-weight: 600;
  color: var(--bg-title);
}

.bg-ev-link {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  margin: 18px 0 0;
  padding: 12px 20px;
  border: 2px solid var(--bg-brand);
  border-radius: var(--bg-radius-md);
  background: #ffffff;
  color: var(--bg-brand-deep);
  font-size: 18px;
  font-weight: 600;
  text-decoration: none;
  text-align: center;
}

.bg-ev-link:hover {
  background: var(--bg-brand-soft);
}

.bg-ev-link:focus-visible {
  outline: 3px solid rgba(23, 128, 106, 0.55);
  outline-offset: 2px;
}

.bg-ev-scope {
  margin: 12px 0 0;
  font-size: 16px;
  line-height: 1.7;
  color: var(--bg-ink-faint);
}

.bg-ev-scope--fail {
  color: var(--bg-danger);
}

.bg-ev-trace {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--bg-ink-faint);
}

/* 电脑端：结果条目改为「左侧信息 + 右侧按钮」，避免长按钮显得笨重 */
@media (min-width: 720px) {
  .bg-result {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    padding: 20px 22px;
  }

  .bg-result-body {
    min-width: 0;
  }

  .bg-result-btn {
    flex: none;
    width: auto;
    min-width: 168px;
    margin-top: 0;
  }
}

/* ============================================================
   第五阶段：结果页六区域（关注结果 / 证据卡补充 / 咨询卡）
   ============================================================ */

/* ---------- 区域 2：骨健康关注结果 ---------- */

.bg-concern-head {
  margin: 14px 0 0;
  font-size: 21px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--bg-title);
}

.bg-concern-sub {
  margin: 10px 0 0;
  font-size: 17px;
  line-height: 1.7;
  color: var(--bg-ink-soft);
}

.bg-concern-list {
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
}

.bg-concern-item {
  padding: 14px 0 0;
}

.bg-concern-item + .bg-concern-item {
  margin-top: 6px;
  border-top: 1px solid var(--bg-line);
}

.bg-concern-text {
  margin: 0;
  font-size: 19px;
  line-height: 1.8;
  color: var(--bg-ink);
}

.bg-concern-note {
  margin: 8px 0 0;
  font-size: 16px;
  line-height: 1.7;
  color: var(--bg-ink-soft);
}

.bg-reason-list {
  margin: 14px 0 0;
  padding-left: 22px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--bg-ink-soft);
}

/* 类别层面证据标记（重要信息不只靠颜色，带文字说明） */
.bg-classbadge {
  display: inline-block;
  margin: 0 0 8px;
  padding: 4px 12px;
  border-radius: 999px;
  background: #fdf3e3;
  border: 1px solid #e8c98f;
  font-size: 15px;
  font-weight: 600;
  color: #7a5518;
}

.bg-concern .bg-classbadge {
  margin-bottom: 4px;
}

.bg-ev-classbadge {
  display: block;
  margin: 0 0 10px;
  padding: 8px 12px;
  border-radius: 10px;
  background: #fdf3e3;
  border: 1px solid #e8c98f;
  font-size: 15px;
  font-weight: 600;
  color: #7a5518;
}

.bg-ev-classnote {
  display: block;
  margin-top: 4px;
  font-weight: 400;
  font-size: 15px;
  line-height: 1.6;
  color: #7a5518;
}

/* ---------- 区域 5：医生咨询问题与沟通卡 ---------- */

.bg-dq-list {
  margin: 14px 0 18px;
  padding: 0;
  list-style: none;
}

.bg-dq-item {
  padding: 12px 14px;
  margin-top: 10px;
  border-radius: 12px;
  background: #ffffff;
  border: 1px solid var(--bg-line);
  font-size: 18px;
  line-height: 1.7;
  color: var(--bg-ink);
}

.bg-consult {
  margin-top: 16px;
  padding: 16px;
  border-radius: 12px;
  background: #ffffff;
  border: 2px solid var(--bg-brand);
}

.bg-consult-title {
  margin: 0;
  font-size: 19px;
  font-weight: 600;
  color: var(--bg-title);
}

.bg-consult-hint {
  margin: 8px 0 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--bg-ink-soft);
}

.bg-consult-text {
  margin: 12px 0;
  padding: 14px;
  border-radius: 10px;
  background: var(--bg-blue-soft);
  border: 1px solid var(--bg-line);
  font-family: inherit;
  font-size: 16px;
  line-height: 1.8;
  color: var(--bg-ink);
  white-space: pre-wrap;
  word-break: break-word;
  max-height: 320px;
  overflow-y: auto;
}

.bg-copy-msg {
  margin: 10px 0 0;
  min-height: 22px;
  font-size: 16px;
  color: var(--bg-brand-deep);
}

@media (min-width: 720px) {
  .bg-concern-text {
    font-size: 20px;
  }
}