/* ==========================================================================
 银龄资讯网 (SilverAge News) - 原生适老化样式表 (style.css)
 设计理念：专为老年群体与视障人群设计，高对比度、大字号、防误触、全端适配
 适用语言：英文内容呈现；代码注释全部保留中文规范
 ========================================================================== */

/* --------------------------------------------------------------------------
 1. CSS 变量与主题定义（支持标准明亮模式与黑底黄字高对比度模式）
 -------------------------------------------------------------------------- */
:root {
  /* 基础字号变量（标准适老化字号：正文不低于 20px） */
  --font-base: 20px;
  --font-title-lg: 34px;
  --font-title-md: 26px;
  --font-title-sm: 22px;
  --font-small: 18px;

  /* 明亮模式配色：暖米白底色，深灰黑字，柔和保护视力，拒绝刺眼纯白与低对比浅灰 */
  --bg-page: #f9f8f4; /* 页面背景色：柔和暖白米色，不伤眼 */
  --bg-card: #ffffff; /* 卡片与文章容器背景色 */
  --bg-subtle: #f0eee6; /* 次级区块背景色 */
  --bg-toolbar: #e9f3ec; /* 顶部适老化无障碍辅助栏底色：清爽淡绿 */

  --text-main: #1a1a1a; /* 正文主标题文字：近纯黑，对比度极高（>12:1） */
  --text-regular: #2a2a2a; /* 正文段落文字：清晰深墨色（>10:1） */
  --text-muted: #4a4a4a; /* 次级辅助说明文字：确保高对比度（>5.5:1） */

  --color-primary: #1b6d3b; /* 品牌主题色：长青绿，易识别 */
  --color-primary-hover: #124d29; /* 主题色悬停/激活加深状态 */
  --color-primary-bg: #eaf5ee; /* 主题强调浅底色 */

  --color-accent: #c44000; /* 重点警示/提示色：醒目深橙红 */
  --color-border: #cccccc; /* 边界线颜色：清晰分明 */
  --color-border-bold: #888888; /* 强化边界线颜色 */

  --focus-outline: #ff9900; /* 键盘操作或点击聚焦高亮外框（防误触与辅助标识） */
  --reading-highlight: #fff3a8; /* 语音正在播报段落的高亮背景色 */
  --progress-bar-color: #1b6d3b; /* 顶部阅读进度条颜色 */

  /* 控件尺寸规范：保证长辈手指触控及鼠标点击，最小操作区域 >= 50px */
  --touch-min-height: 52px;
  --border-radius-base: 8px;
  --line-height-text: 1.85; /* 英文长篇段落舒适行高 */
}

/* --------------------------------------------------------------------------
 2. 高对比度关怀模式（黑底黄字模式，符合国家适老化无障碍标准最高等级）
 -------------------------------------------------------------------------- */
body.high-contrast {
  --bg-page: #000000; /* 纯黑背景 */
  --bg-card: #121212; /* 深黑卡片背景 */
  --bg-subtle: #1c1c1c; /* 次级深灰底色 */
  --bg-toolbar: #242400; /* 工具栏深黄黑底色 */

  --text-main: #ffff00; /* 主标题与核心按钮：高亮柠檬黄，暗室与老花眼极其清晰 */
  --text-regular: #ffffd0; /* 正文字体：柔和亮黄白，避免反光 */
  --text-muted: #00ffff; /* 辅助标注：青色高亮，层次鲜明 */

  --color-primary: #ffd700; /* 金黄主色调 */
  --color-primary-hover: #ffffff; /* 激活为亮白 */
  --color-primary-bg: #332b00; /* 金黄低亮度底衬 */

  --color-accent: #ff6666; /* 红色警示改用亮粉红，对比更强 */
  --color-border: #ffff00; /* 黄色清晰实线分割 */
  --color-border-bold: #ffff55; /* 强化边框 */

  --focus-outline: #00ffff; /* 聚焦变为亮青蓝，分外显眼 */
  --reading-highlight: #4d4400; /* 高对比朗读高亮底色 */
  --progress-bar-color: #ffff00; /* 进度条高对比黄 */
}

/* --------------------------------------------------------------------------
 3. 字号等级切换控制（标准 20px / 大号 24px / 特大 28px）
 -------------------------------------------------------------------------- */
body.font-standard {
  --font-base: 20px;
  --font-title-lg: 34px;
  --font-title-md: 26px;
  --font-title-sm: 22px;
  --font-small: 18px;
}

body.font-large {
  --font-base: 24px;
  --font-title-lg: 40px;
  --font-title-md: 30px;
  --font-title-sm: 26px;
  --font-small: 21px;
}

body.font-xlarge {
  --font-base: 28px;
  --font-title-lg: 46px;
  --font-title-md: 36px;
  --font-title-sm: 30px;
  --font-small: 24px;
}

/* --------------------------------------------------------------------------
 4. 基础全局样式重置与排版规范
 -------------------------------------------------------------------------- */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: var(--font-base);
  scroll-behavior: smooth;
  width: 100%;
  overflow-x: hidden;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Helvetica Neue', sans-serif;
  font-size: var(--font-base);
  line-height: var(--line-height-text);
  color: var(--text-regular);
  background-color: var(--bg-page);
  letter-spacing: 0.015em;
  transition:
    background-color 0.25s ease,
    color 0.25s ease;
  min-width: 320px;
  width: 100%;
  overflow-x: hidden;
  -webkit-tap-highlight-color: transparent;
}

/* 页面顶部阅读进度指示条 */
.reading-progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 6px;
  background-color: var(--progress-bar-color);
  z-index: 10002;
  transition: width 0.1s linear;
}

/* 针对视障与老年用户的键盘导航高亮外框 */
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible {
  outline: 4px solid var(--focus-outline) !important;
  outline-offset: 3px !important;
}

/* 清晰超链接样式 */
a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 4px;
  transition: color 0.2s ease;
}

a:hover,
a:active {
  color: var(--color-primary-hover);
}

.btn-large {
  min-height: var(--touch-min-height);
  min-width: 50px;
  padding: 8px 16px;
  font-size: var(--font-small);
  font-weight: bold;
  font-family: inherit;
  color: var(--text-main);
  background-color: var(--bg-card);
  border: 2px solid var(--color-border-bold);
  border-radius: var(--border-radius-base);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  transition: all 0.2s ease;
  user-select: none;
  box-sizing: border-box;
}

.btn-large:hover {
  color: var(--text-main);
  background-color: var(--bg-subtle);
  border-color: var(--text-main);
}

/* 当前处于激活/选中状态的按键 */
.btn-large.active,
.btn-large[aria-pressed='true'] {
  background-color: var(--color-primary);
  color: #ffffff;
  border-color: var(--color-primary);
}

body.high-contrast .btn-large.active,
body.high-contrast .btn-large[aria-pressed='true'] {
  background-color: #ffff00;
  color: #000000;
  border-color: #ffff00;
}

/* --------------------------------------------------------------------------
 6. 网站主头部与信息栏（标志、标准美国日历、大字搜索框防变形设计）
 -------------------------------------------------------------------------- */
.site-header {
  background-color: var(--bg-card);
  border-bottom: 2px solid var(--color-border);
  padding: 16px 18px;
}

.site-header-inner {
  max-width: 1240px;
  margin: 0 auto;
}

/* 搜索与天气左右结构容器 */
.header-search-weather-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  width: 100%;
}

/* 左侧：搜索框区域 */
.header-search-side {
  flex: 1 1 540px;
  min-width: 280px;
}

.search-container {
  display: flex;
  align-items: stretch;
  width: 100%;
  box-sizing: border-box;
}

.search-input {
  flex: 1 1 auto;
  min-width: 0;
  min-height: var(--touch-min-height);
  padding: 10px 18px;
  font-size: 19px;
  font-family: inherit;
  color: var(--text-main);
  background-color: var(--bg-page);
  border: 3px solid var(--color-border-bold);
  border-right: none;
  border-radius: var(--border-radius-base) 0 0 var(--border-radius-base);
  box-sizing: border-box;
}

.search-btn {
  flex: 0 0 auto;
  min-height: var(--touch-min-height);
  padding: 10px 24px;
  font-size: 19px;
  font-weight: bold;
  font-family: inherit;
  background-color: var(--color-primary);
  color: #ffffff;
  border: 3px solid var(--color-primary);
  border-radius: 0 var(--border-radius-base) var(--border-radius-base) 0;
  cursor: pointer;
  white-space: nowrap;
  box-sizing: border-box;
  transition: opacity 0.2s ease;
}

.search-btn:hover {
  opacity: 0.92;
}

body.high-contrast .search-btn {
  background-color: #ffff00;
  color: #000000;
  border-color: #ffff00;
}

/* 右侧：标准美国公历日期与天气看板 */
.header-weather-side {
  flex: 0 1 auto;
}

.weather-calendar-box {
  background-color: var(--bg-subtle);
  border: 2px solid var(--color-border);
  border-radius: var(--border-radius-base);
  padding: 8px 18px;
  display: flex;
  align-items: center;
  gap: 18px;
  flex-shrink: 0;
}

.date-large {
  font-size: 17px;
  font-weight: 800;
  color: var(--text-main);
}

.calendar-subtext {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-primary);
  margin-top: 2px;
}

body.high-contrast .calendar-subtext {
  color: #ffff00;
}

.weather-info {
  font-size: 13px;
  color: var(--text-muted);
  border-left: 2px solid var(--color-border);
  padding-left: 14px;
  line-height: 1.4;
}

.air-quality-badge {
  color: var(--color-primary);
  font-weight: 700;
}

body.high-contrast .air-quality-badge {
  color: #00ffff;
}

/* --------------------------------------------------------------------------
 7. 主导航栏（深度集成 SilverStoryHub 品牌标识、适老化阅读工具与专题标签）
 -------------------------------------------------------------------------- */
.main-nav {
  background-color: var(--color-primary);
  padding: 10px 18px 8px 18px;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.12);
  border-bottom: 3px solid rgba(0, 0, 0, 0.14);
  z-index: 1000;
}

body.high-contrast .main-nav {
  background-color: #1a1a1a;
  border-top: 2px solid #ffff00;
  border-bottom: 3px solid #ffff00;
}

.nav-inner-container {
  max-width: 1240px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

/* 导航栏第一行：品牌标识（左） + 适老化阅读辅助工具集（右） */
.nav-top-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

body.high-contrast .nav-top-row {
  border-bottom-color: #ffff00;
}

/* 导航栏内嵌品牌标识 */
.nav-branding {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.nav-brand-link {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: #ffffff;
  padding: 4px 6px;
  border-radius: 8px;
  transition: opacity 0.2s ease;
}

.nav-brand-link:hover {
  opacity: 0.92;
}

.nav-brand-logo-icon {
  width: 44px;
  height: 44px;
  background-color: #ffffff;
  color: var(--color-primary);
  border-radius: 10px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  font-weight: 900;
  font-size: 13px;
  line-height: 1.1;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.15);
  flex-shrink: 0;
}

body.high-contrast .nav-brand-logo-icon {
  background-color: #ffff00;
  color: #000000;
}

.nav-brand-text {
  display: flex;
  flex-direction: column;
}

.nav-brand-name {
  font-size: 22px;
  font-weight: 900;
  color: #ffffff;
  line-height: 1.15;
  letter-spacing: -0.01em;
}

body.high-contrast .nav-brand-name {
  color: #ffff00;
}

.nav-brand-domain {
  font-size: 13px;
  font-weight: 700;
  color: #e0f2fe;
  letter-spacing: 0.02em;
}

body.high-contrast .nav-brand-domain {
  color: #ffffff;
}

/* --------------------------------------------------------------------------
 7.1 导航栏适老化阅读工具组 (Reading Timer + Font Switcher + Care Mode)
 -------------------------------------------------------------------------- */
.nav-tools-cluster {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

/* 关怀模式与文章语言切换始终并排。 */
.nav-care-controls {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.nav-language-switcher {
  position: relative;
}

.nav-language-toggle {
  list-style: none;
}

.nav-language-toggle::-webkit-details-marker {
  display: none;
}

.nav-language-toggle:focus-visible {
  outline: 4px solid var(--focus-outline);
  outline-offset: 3px;
}

.nav-language-list {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  z-index: 1;
  min-width: 140px;
  max-height: 50vh;
  overflow-y: auto;
  padding: 6px;
  border: 2px solid var(--color-border);
  border-radius: var(--border-radius-base);
  background: var(--bg-card);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.nav-language-link {
  display: flex;
  align-items: center;
  min-height: var(--touch-min-height);
  padding: 8px 14px;
  border-radius: 4px;
  color: var(--text-main);
  font-size: var(--font-small);
  text-decoration: none;
  overflow-wrap: anywhere;
}

.nav-language-link:hover,
.nav-language-link[aria-current='true'] {
  background: var(--color-primary-bg);
  color: var(--color-primary);
  font-weight: 700;
}

/* 实时阅读时长徽章（结合导航栏风格） */
.nav-timer-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background-color: rgba(255, 255, 255, 0.16);
  border: 2px solid rgba(255, 255, 255, 0.35);
  border-radius: 8px;
  padding: 5px 12px;
  font-size: 15px;
  color: #ffffff;
  white-space: nowrap;
  flex-shrink: 0;
  user-select: none;
}

.nav-timer-icon {
  font-size: 16px;
}

.nav-timer-label {
  font-weight: 700;
  color: #e0f2fe;
}

.nav-timer-digits {
  font-weight: 800;
  color: #fef08a; /* 醒目柔和亮黄色，极易长辈辨识 */
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.04em;
  font-size: 16px;
}

body.high-contrast .nav-timer-badge {
  background-color: #000000;
  border-color: #ffff00;
}

body.high-contrast .nav-timer-digits {
  color: #ffff00;
}

/* 字号三档切换组（Standard / Large / X-Large） */
.nav-font-control-group {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background-color: rgba(0, 0, 0, 0.18);
  border: 2px solid rgba(255, 255, 255, 0.35);
  border-radius: 8px;
  padding: 3px 6px;
  flex-shrink: 0;
}

.nav-font-label {
  font-size: 13px;
  font-weight: 800;
  color: #e0f2fe;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding-left: 2px;
}

body.high-contrast .nav-font-label {
  color: #ffffa0;
}

.nav-font-btn-row {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.nav-tool-btn {
  min-height: 36px;
  padding: 4px 12px;
  font-size: 15px;
  font-weight: 700;
  font-family: inherit;
  color: #ffffff;
  background-color: rgba(255, 255, 255, 0.12);
  border: 2px solid rgba(255, 255, 255, 0.25);
  border-radius: 6px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  transition: all 0.2s ease;
  user-select: none;
  white-space: nowrap;
}

.nav-tool-btn:hover {
  background-color: rgba(255, 255, 255, 0.25);
  border-color: #ffffff;
}

.nav-tool-btn.active,
.nav-tool-btn[aria-pressed='true'] {
  background-color: #ffffff;
  color: var(--color-primary);
  border-color: #ffffff;
  font-weight: 800;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2);
}

body.high-contrast .nav-tool-btn {
  background-color: #000000;
  color: #ffffff;
  border-color: #ffffff;
}

body.high-contrast .nav-tool-btn.active,
body.high-contrast .nav-tool-btn[aria-pressed='true'] {
  background-color: #ffff00;
  color: #000000;
  border-color: #ffff00;
}

/* 导航栏黑底黄字关怀模式按钮 */
.nav-care-toggle {
  background-color: #111827;
  color: #fef08a;
  border: 2px solid #fef08a;
  border-radius: 8px;
  font-weight: 800;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.18);
}

.nav-care-toggle:hover {
  background-color: #000000;
  border-color: #ffffff;
  color: #ffffff;
  transform: translateY(-1px);
}

body.high-contrast .nav-care-toggle {
  background-color: #ffff00;
  color: #000000;
  border-color: #ffffff;
}

/* --------------------------------------------------------------------------
 7.2 导航栏第二行：专题标签导航 (Combined Tag Pills)
 -------------------------------------------------------------------------- */
.nav-bottom-row {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  width: 100%;
}
.nav-bottom-row::-webkit-scrollbar {
  display: none;
}
.nav-tag-group {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.nav-tag-label {
  font-size: 15px;
  font-weight: 800;
  color: #d1fae5;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

body.high-contrast .nav-tag-label {
  color: #ffffa0;
}

/* 标签列表容器 */
.nav-list {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  flex-wrap: wrap;
}

.nav-item {
  margin: 2px 0;
  flex-shrink: 0;
}

/* 标签化导航药丸（融合标签视觉与导航交互） */
.nav-link,
.nav-tag-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 44px;
  padding: 7px 18px;
  font-size: 17px;
  font-weight: 700;
  color: #ffffff;
  background-color: rgba(255, 255, 255, 0.12);
  text-decoration: none;
  border-radius: 9999px; /* 标签药丸形态 */
  border: 2px solid rgba(255, 255, 255, 0.35);
  transition: all 0.2s ease;
  white-space: nowrap;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.06);
}

.nav-link:hover,
.nav-tag-pill:hover,
.nav-link:focus-visible,
.nav-tag-pill:focus-visible {
  background-color: rgba(255, 255, 255, 0.25);
  border-color: #ffffff;
  color: #ffffff;
  transform: translateY(-1px);
}

.nav-link.current,
.nav-tag-pill.current {
  background-color: #ffffff;
  color: var(--color-primary);
  border-color: #ffffff;
  font-weight: 800;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.18);
}

body.high-contrast .nav-link,
body.high-contrast .nav-tag-pill {
  background-color: #000000;
  color: #ffffff;
  border-color: #ffffff;
}

body.high-contrast .nav-link:hover,
body.high-contrast .nav-tag-pill:hover,
body.high-contrast .nav-link:focus-visible,
body.high-contrast .nav-tag-pill:focus-visible {
  background-color: #333333;
  color: #ffff00;
  border-color: #ffff00;
}

body.high-contrast .nav-link.current,
body.high-contrast .nav-tag-pill.current {
  background-color: #ffff00;
  color: #000000;
  border-color: #ffff00;
}

/* --------------------------------------------------------------------------
 12. 网站通用页脚（适老化声明、版权说明）
 -------------------------------------------------------------------------- */
.site-footer {
  background-color: var(--bg-card);
  border-top: 4px solid var(--color-primary);
  padding: 40px 20px 60px;
  margin-top: 40px;
}

body.high-contrast .site-footer {
  border-top-color: #ffff00;
}

.footer-inner {
  max-width: 1240px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 24px;
  text-align: center;
}

.footer-badge-box {
  display: inline-flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  gap: 12px;
  background-color: var(--bg-subtle);
  border: 2px solid var(--color-border);
  padding: 12px 24px;
  border-radius: 12px;
  margin: 0 auto;
  font-size: var(--font-base);
  font-weight: 400;
  color: var(--text-main);
  text-align: left;
}

.footer-about-title {
  font-size: var(--font-title-sm);
  font-weight: 800;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 20px;
  list-style: none;
}

.footer-nav a {
  font-size: var(--font-base);
  font-weight: bold;
  color: var(--text-main);
}

.footer-statement {
  font-size: var(--font-small);
  color: var(--text-muted);
  line-height: 1.8;
  /* max-width: 800px; */
  margin: 0 auto;
}

/* --------------------------------------------------------------------------
 13. 浮动快速回到顶部按钮（超大尺寸、高对比度固定悬浮）
 -------------------------------------------------------------------------- */
.floating-back-top {
  position: fixed;
  bottom: 30px;
  right: 28px;
  width: 66px;
  height: 66px;
  border-radius: 50%;
  background-color: var(--color-primary);
  color: #ffffff;
  border: 3px solid #ffffff;
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.25);
  font-size: 26px;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 999;
  transition: all 0.2s ease;
}

.floating-back-top span {
  font-size: 13px;
  font-weight: bold;
  margin-top: -3px;
}

.floating-back-top:hover {
  transform: scale(1.08);
  background-color: var(--color-primary-hover);
}

body.high-contrast .floating-back-top {
  background-color: #ffff00;
  color: #000000;
  border: 3px solid #ffff00;
}

/* --------------------------------------------------------------------------
 14. 适老化健康护眼弹窗与舒缓养神蒙层
 -------------------------------------------------------------------------- */
.modal-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.75);
  z-index: 10050;
  align-items: center;
  justify-content: center;
  padding: 16px;
  backdrop-filter: blur(4px);
}

.modal-card {
  background-color: var(--bg-card);
  border: 4px solid var(--color-primary);
  border-radius: 14px;
  max-width: 580px;
  width: 100%;
  padding: 30px 28px;
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.4);
  animation: modalFadeIn 0.25s ease;
}

body.high-contrast .modal-card {
  border-color: #ffff00;
  background-color: #121212;
}

@keyframes modalFadeIn {
  from {
    opacity: 0;
    transform: translateY(-16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.modal-header {
  border-bottom: 2px dashed var(--color-border);
  padding-bottom: 14px;
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.modal-title {
  font-size: var(--font-title-md);
  font-weight: 800;
  color: var(--text-main);
}

.modal-body {
  font-size: var(--font-base);
  color: var(--text-regular);
  line-height: 1.8;
  margin-bottom: 24px;
}

.modal-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: flex-end;
}

/* 闭目养神全屏沉浸式护眼模式 */
.rest-screen-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: #0c1810;
  color: #e2f5e8;
  z-index: 10060;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 24px;
}

body.high-contrast .rest-screen-overlay {
  background-color: #000000;
  color: #ffff00;
}

.rest-timer-display {
  font-size: clamp(48px, 12vw, 84px);
  font-weight: 900;
  color: #55f088;
  margin: 20px 0;
  font-variant-numeric: tabular-nums;
}

body.high-contrast .rest-timer-display {
  color: #ffff00;
}

.rest-guide-text {
  font-size: var(--font-title-md);
  max-width: 600px;
  line-height: 1.8;
  margin-bottom: 30px;
}

/* 公共组件的原稿细节 */
.nav-brand-logo-caption {
  font-size: 10px;
  letter-spacing: 0.04em;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

.footer-accessibility-icon {
  font-size: 24px;
}

.footer-domain {
  margin-top: 6px;
}

.footer-domain-link {
  color: inherit;
  font-weight: bold;
  text-decoration: underline;
}

.modal-care-icon {
  font-size: 32px;
}

.modal-body-followup {
  margin-top: 10px;
}

.button-primary {
  background-color: var(--color-primary);
  color: #ffffff;
  border-color: var(--color-primary);
}

.rest-screen-icon {
  font-size: 40px;
}

.rest-screen-title {
  font-size: var(--font-title-lg);
  margin-top: 10px;
}

.rest-exit-button {
  background-color: #ffffff;
  color: #111111;
  border-color: #ffffff;
  min-width: 180px;
}

html,
body {
  overflow-x: visible;
  min-width: 0;
}

body {
  overflow-wrap: break-word;
}

strong,
b {
  font-weight: 700;
}

button,
input {
  font: inherit;
}

[hidden] {
  display: none !important;
}

img {
  max-width: 100%;
}

.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 11000;
  padding: 10px 16px;
  color: var(--text-main);
  background: var(--bg-card);
  transform: translateY(-160%);
}

.skip-link:focus {
  transform: none;
}

.modal-card {
  max-height: calc(100dvh - 32px);
  overflow-y: auto;
}

.rest-screen-overlay {
  overflow-y: auto;
  padding: 24px;
}

.elder-toast {
  position: fixed;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  width: max-content;
  max-width: calc(100% - 32px);
  padding: 16px 24px;
  border: 3px solid var(--color-border);
  border-radius: 12px;
  background: var(--text-main);
  color: var(--bg-card);
  font-size: var(--font-small);
  font-weight: 700;
  text-align: center;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
  z-index: 10060;
}

body.reading-dialog-open {
  overflow: hidden;
}

/* 所有页面的适配和主题覆盖统一放在基础样式之后。 */

/* 所有分辨率适配统一维护在此文件 */
/* --------------------------------------------------------------------------
 15. 移动端专项适老优化适配（彻底解决拉伸变形）
 -------------------------------------------------------------------------- */

/* 中屏适配（平板与小屏笔记本 <= 960px） */
@media (max-width: 960px) {
  .layout-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }
}

/* 移动端核心适配（主流手机屏幕 <= 768px） */
@media (max-width: 768px) {
  body.font-standard {
    --font-base: 19px;
    --font-title-lg: 27px;
    --font-title-md: 23px;
    --font-title-sm: 20px;
    --font-small: 17px;
  }

  body.font-large {
    --font-base: 22px;
    --font-title-lg: 31px;
    --font-title-md: 26px;
    --font-title-sm: 23px;
    --font-small: 19px;
  }

  body.font-xlarge {
    --font-base: 25px;
    --font-title-lg: 35px;
    --font-title-md: 29px;
    --font-title-sm: 25px;
    --font-small: 21px;
  }

  /* 顶部无障碍工具栏在移动端防变形排版 */
  .accessibility-bar {
    padding: 10px 12px;
  }

  .accessibility-inner {
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
  }

  .accessibility-brand-tag {
    justify-content: flex-start;
    font-size: 16px;
  }

  .reading-timer-badge {
    width: 100%;
    justify-content: center;
    padding: 8px 12px;
    font-size: 16px;
  }

  .toolbar-controls {
    flex-direction: column;
    width: 100%;
    gap: 8px;
  }

  .control-group {
    width: 100%;
    justify-content: space-between;
    padding: 6px 8px;
  }

  .control-group .btn-large {
    flex: 1;
    min-width: 0;
    padding: 8px 4px;
    font-size: 15px;
  }

  .btn-contrast-toggle {
    width: 100%;
    min-height: 50px;
  }

  /* 头部区域移动端紧凑排版 */
  .site-header {
    padding: 16px 14px;
  }

  .site-header-inner {
    gap: 14px;
  }

  .header-top-row {
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
  }

  .branding-area {
    justify-content: center;
    text-align: left;
  }

  .brand-logo-icon {
    width: 56px;
    height: 56px;
    font-size: 18px;
  }

  .brand-text h1 {
    font-size: var(--font-title-md);
  }

  .weather-calendar-box {
    width: 100%;
    justify-content: space-between;
    padding: 10px 14px;
    gap: 12px;
  }

  .date-large {
    font-size: 16px;
  }

  .weather-info {
    padding-left: 10px;
    font-size: 13px;
  }

  /* 移动端搜索与天气左右结构自适应换行 */
  .header-search-weather-row {
    flex-direction: column-reverse;
    align-items: stretch;
    gap: 12px;
  }

  .header-weather-side {
    width: 100%;
  }

  .header-search-side {
    width: 100%;
  }

  .search-container {
    width: 100%;
  }

  .search-input {
    font-size: 17px;
    padding: 8px 14px;
  }

  .search-btn {
    padding: 8px 18px;
    font-size: 17px;
  }

  /* 移动端主导航栏适配（双行集成架构） */
  .main-nav {
    padding: 8px 10px;
  }

  .nav-inner-container {
    flex-direction: column;
    align-items: stretch;
    gap: 8px;
  }

  .nav-top-row {
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding-bottom: 8px;
  }

  .nav-branding {
    justify-content: center;
    width: 100%;
  }

  .nav-tools-cluster {
    justify-content: center;
    width: 100%;
    gap: 6px;
  }

  .nav-care-controls {
    gap: 6px;
  }

  .nav-timer-badge {
    padding: 4px 8px;
    font-size: 13px;
  }

  .nav-font-control-group {
    padding: 2px 4px;
    gap: 4px;
  }

  .nav-tool-btn {
    min-height: 34px;
    padding: 3px 8px;
    font-size: 13px;
  }

  .nav-care-toggle {
    padding: 4px 10px;
    font-size: 13px;
  }

  .nav-bottom-row {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    padding-bottom: 2px;
  }

  .nav-tag-group {
    flex-wrap: nowrap;
    width: auto;
    gap: 8px;
  }

  .nav-list {
    flex-wrap: nowrap;
    width: auto;
    gap: 6px;
  }

  .nav-link {
    min-height: 40px;
    padding: 5px 12px;
    font-size: 15px;
    white-space: nowrap;
  }

  /* 主体边距 */
  .site-content {
    margin: 16px auto;
    padding: 0 12px;
  }

  .headline-focus-banner {
    padding: 16px 14px;
    border-left-width: 6px;
    margin-bottom: 20px;
  }

  .article-container {
    padding: 20px 14px;
    margin-bottom: 24px;
  }

  /* 关怀条移动端适配 */
  .article-care-bar {
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
  }

  .care-bar-right {
    width: 100%;
  }

  .care-bar-right .btn-large {
    flex: 1;
    font-size: 15px;
  }

  /* 语音控制栏移动端适配 */
  .audio-read-panel {
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
    padding: 14px;
  }

  .audio-panel-actions {
    width: 100%;
  }

  .audio-panel-actions .btn-large {
    flex: 1;
    min-width: 0;
  }

  .callout-box {
    padding: 14px 14px;
  }

  .callout-box ul {
    padding-left: 18px;
  }

  /* 关键修复：分区头部在移动端垂直排列，彻底解决 Senior News 标题和 View All Stories 挤压拉伸 */
  .section-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
    padding-bottom: 10px;
    margin-bottom: 16px;
  }

  .section-title {
    font-size: 21px;
    line-height: 1.3;
    width: 100%;
  }

  .section-more-link {
    font-size: 16px;
    align-self: flex-start;
  }

  /* 新闻列表大卡片在移动端垂直排列 */
  .section-container {
    padding: 18px 14px;
  }

  .news-card {
    flex-direction: column;
    gap: 12px;
    padding: 14px;
  }

  .news-card-thumb {
    width: 100%;
    height: 160px;
  }

  /* 侧边栏卡片适配 */
  .sidebar-card {
    padding: 16px 14px;
  }

  /* 弹窗在移动端铺满 */
  .modal-card {
    padding: 20px 18px;
  }

  .modal-actions {
    flex-direction: column;
  }

  .modal-actions .btn-large {
    width: 100%;
  }

  /* 页脚移动端留白与返回顶部按钮定位 */
  .site-footer {
    padding: 28px 14px 90px;
  }

  .footer-badge-box {
    padding: 10px 16px;
    font-size: 15px;
    width: 100%;
  }

  .footer-nav {
    gap: 12px 18px;
  }

  .floating-back-top {
    bottom: 20px;
    right: 18px;
    width: 58px;
    height: 58px;
    font-size: 22px;
  }
}

/* 超窄屏手机微调 (<= 380px) */
@media (max-width: 380px) {
  .control-group {
    flex-wrap: wrap;
    gap: 4px;
  }

  .control-group .btn-large {
    min-width: 30%;
  }

  .weather-calendar-box {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }

  .weather-info {
    border-left: none;
    border-top: 1px dashed var(--color-border);
    padding-left: 0;
    padding-top: 6px;
  }
}

body.high-contrast .button-primary,
body.high-contrast .hero-feature-cta,
body.high-contrast .hero-feature-badge,
body.high-contrast .article-read-more-link {
  color: #000;
  background: var(--color-primary);
  border-color: var(--color-primary);
}

body.high-contrast .hero-feature-link {
  color: #ffff00;
}

body.high-contrast .hero-feature .hero-feature-meta,
body.high-contrast .hero-feature .hero-feature-summary {
  color: #ffffd0;
}

.font-large .wellness-grid,
.font-xlarge .wellness-grid {
  grid-template-columns: minmax(0, 1fr);
}

.font-xlarge .layout-grid {
  grid-template-columns: minmax(0, 1fr);
}

#topStories,
#mainArticle,
#socialSecurity,
#medicare,
#scamAlerts {
  scroll-margin-top: 180px;
}

@media (max-width: 1100px) {
  .nav-top-row {
    justify-content: center;
  }

  .hero-feature {
    padding: 28px;
  }

  .latest-updates {
    padding: 20px;
  }

  .latest-updates-title {
    font-size: 16px;
  }
}

@media (max-width: 960px) {
  .layout-grid,
  .hero-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .hero-feature {
    min-height: 420px;
  }

  .latest-updates-list {
    gap: 16px;
  }
}

@media (max-width: 768px) {
  .main-nav {
    position: relative;
  }

  .nav-font-control-group {
    flex: 1 1 100%;
    justify-content: center;
    order: 3;
    min-width: 0;
    padding: 4px;
  }

  .nav-font-btn-row {
    flex: 1;
    justify-content: center;
  }

  .nav-tool-btn {
    min-height: 44px;
    font-size: 14px;
    padding: 6px 10px;
  }

  .nav-font-btn-row .nav-tool-btn {
    flex: 1;
  }

  .nav-link {
    min-height: 44px;
  }

  .nav-tag-label {
    display: none;
  }

  .nav-bottom-row {
    max-width: 100%;
  }

  .nav-list {
    width: max-content;
  }

  .weather-calendar-box {
    flex-wrap: wrap;
  }

  .search-input {
    min-width: 0;
  }

  .hero-feature {
    padding: 24px 20px;
    min-height: 460px;
  }

  .hero-feature-title {
    font-size: var(--font-title-md);
  }

  .hero-feature-cta {
    width: 100%;
    font-size: var(--font-small);
  }

  .latest-updates {
    padding: 20px 16px;
  }

  .home-hero-split-spacing {
    margin-bottom: 24px;
  }

  .wellness-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 14px;
  }

  .wellness-spotlight {
    padding: 20px 14px;
    margin-bottom: 24px;
  }

  .wellness-card {
    padding: 18px;
  }

  .section-title,
  .wellness-title {
    font-size: var(--font-title-sm);
  }

  .care-bar-left,
  .audio-panel-desc {
    align-items: flex-start;
  }

  .article-meta-info {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .news-card-thumb {
    height: auto;
    aspect-ratio: 16 / 9;
  }

  .footer-badge-box {
    border-radius: 12px;
    align-items: flex-start;
  }

  .rest-screen-overlay {
    padding: 20px 16px;
  }

  .rest-timer-display {
    font-size: 64px;
  }

  #topStories,
  #mainArticle,
  #socialSecurity,
  #medicare,
  #scamAlerts {
    scroll-margin-top: 20px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }
}

@media (max-width: 768px) {
  .header-search-side {
    flex: 0 1 auto;
  }

  .weather-info {
    border-left: 0;
    padding-left: 0;
  }
}

@media (max-width: 768px) {
  .article-page {
    padding: 18px 12px;
  }

  .article-detail {
    padding: 20px 14px;
  }

  .article-category-row {
    align-items: stretch;
    gap: 8px;
  }

  .article-category-row .btn-back-compact {
    padding: 8px 10px;
    font-size: 14px;
  }

  .article-category-badge {
    padding: 8px 10px;
    font-size: 14px;
  }

  .audio-read-compact {
    align-items: stretch;
    padding: 12px;
  }

  .audio-compact-info {
    align-items: flex-start;
    font-weight: 400;
  }

  .audio-compact-actions {
    width: 100%;
    flex-wrap: wrap;
  }

  .audio-compact-actions .btn-audio-compact {
    flex: 1;
    font-size: var(--font-small);
  }

  .article-action-card {
    padding: 18px 14px;
  }

  .article-action-heading {
    align-items: flex-start;
  }

  .article-pagination {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
  }

  .article-pagination-current {
    grid-column: 1 / -1;
    grid-row: 1;
  }

  .article-pagination-button {
    min-width: 0;
    padding: 8px 10px;
    font-size: var(--font-small);
  }

  .cross-promo-section {
    padding: 20px 14px;
    margin-top: 24px;
  }

  .cross-promo-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 18px;
  }

  .cross-promo-thumb {
    height: auto;
    aspect-ratio: 2 / 1;
  }

  .cross-promo-body {
    padding: 16px;
  }
}

@media (max-width: 380px) {
  .article-category-row .btn-back-compact {
    gap: 4px;
    padding: 8px;
    font-size: 13px;
  }

  .article-category-badge {
    font-size: 13px;
  }
}

/* 页脚信息页的移动端适配。 */
@media (max-width: 768px) {
  .footer-page {
    padding: 0 12px;
    margin: 18px auto;
  }

  .footer-page-content {
    padding: 20px 14px;
  }
}

/* 标签列表页的移动端适配。 */
@media (max-width: 768px) {
  .tag-page {
    padding: 0 12px;
    margin: 18px auto;
  }

  .tag-panel {
    padding: 20px 14px;
  }

  .tag-header {
    align-items: flex-start;
  }

  .tag-intro {
    margin-bottom: 20px;
  }
}