/* ============================================================
   环球观察 · 新闻网站通用模板 — 主样式表 (开发版)
   SEO / 响应式 / 无障碍 优化
   ------------------------------------------------------------
   设计令牌 (Design Tokens)
   ============================================================ */
:root {
  /* 品牌色 */
  --color-primary: #c8102e;        /* 主红（新闻强调色） */
  --color-primary-dark: #a50d26;
  --color-ink: #111827;            /* 标题/正文主色 */
  --color-body: #374151;           /* 正文灰 */
  --color-muted: #6b7280;          /* 辅助文字 */
  --color-faint: #9ca3af;          /* 弱化文字 */
  --color-bg: #ffffff;             /* 页面背景 */
  --color-bg-soft: #f6f7f9;        /* 分区浅灰 */
  --color-border: #e6e8ec;         /* 描边 */
  --color-gold: #d97706;           /* 金色强调（热门/趋势） */
  --color-link: #b91c1c;

  /* 字体 */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
               "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB",
               "Microsoft YaHei", sans-serif;
  --font-serif: Georgia, "Times New Roman", "Songti SC", "SimSun", serif;

  /* 尺寸与间距 */
  --container: 1200px;
  --radius: 10px;
  --radius-sm: 6px;
  --shadow-sm: 0 1px 3px rgba(17, 24, 39, .06);
  --shadow-md: 0 6px 24px rgba(17, 24, 39, .10);
  --transition: .22s cubic-bezier(.4, 0, .2, 1);

  /* 头部高度（供粘性定位计算） */
  --header-h: 64px;
}

/* ============================================================
   基础重置
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 12px);
  overflow-x: clip;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-body);
  background: var(--color-bg);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img, svg, video { max-width: 100%; height: auto; display: block; }
img { color: transparent; }

a {
  color: var(--color-link);
  text-decoration: none;
  transition: color var(--transition);
}
a:hover { color: var(--color-primary); }

h1, h2, h3, h4, h5 {
  color: var(--color-ink);
  line-height: 1.25;
  margin: 0 0 .5em;
  font-weight: 700;
}
h1 { font-size: clamp(1.75rem, 3.5vw, 2.5rem); }
h2 { font-size: clamp(1.4rem, 2.6vw, 1.9rem); }
h3 { font-size: clamp(1.15rem, 2vw, 1.4rem); }

p { margin: 0 0 1em; }

ul, ol { padding-left: 1.4em; margin: 0 0 1em; }

/* 无障碍：焦点可见 */
:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: 2px;
}

/* 无障碍：跳过导航 */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 200;
  background: var(--color-ink);
  color: #fff;
  padding: 10px 18px;
  border-radius: 0 0 var(--radius-sm) 0;
}
.skip-link:focus { left: 0; color: #fff; }

/* 无障碍：仅供屏幕阅读器 */
.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: 20px;
}

/* ============================================================
   顶部工具条
   ============================================================ */
.top-bar {
  background: var(--color-ink);
  color: #cbd5e1;
  font-size: 13px;
}
.top-bar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 38px;
  flex-wrap: wrap;
  padding-block: 6px;
}
.top-bar time { font-variant-numeric: tabular-nums; }
.top-bar__links { display: flex; gap: 18px; }
.top-bar__links a { color: #cbd5e1; }
.top-bar__links a:hover { color: #fff; }

/* ============================================================
   头部 / 导航
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, .96);
  backdrop-filter: saturate(180%) blur(8px);
  border-bottom: 1px solid var(--color-border);
}
.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  height: var(--header-h);
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--color-ink);
  letter-spacing: -.02em;
  white-space: nowrap;
  min-width: 0;
  max-width: 100%;
  overflow: hidden;
}
.logo:hover { color: var(--color-ink); }
.logo__mark {
  display: grid;
  place-items: center;
  width: 34px; height: 34px;
  background: var(--color-primary);
  color: #fff;
  border-radius: 8px;
  font-size: 1.05rem;
  font-weight: 900;
  flex-shrink: 0;
}
.logo__mark--serif { font-family: var(--font-serif); }
.logo > span:last-child {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  min-width: 0;
}

/* 主导航 */
.main-nav ul {
  display: flex;
  gap: 6px;
  list-style: none;
  margin: 0; padding: 0;
}
.main-nav a {
  display: block;
  padding: 8px 14px;
  color: var(--color-body);
  font-weight: 600;
  font-size: 15px;
  border-radius: var(--radius-sm);
}
.main-nav a:hover { color: var(--color-primary); background: var(--color-bg-soft); }
.main-nav a[aria-current="page"] { color: var(--color-primary); }
.main-nav a[aria-current="page"]::after {
  content: "";
  display: block;
  height: 2px;
  margin-top: 2px;
  background: var(--color-primary);
  border-radius: 2px;
}

/* 头部动作 */
.header-actions { display: flex; align-items: center; gap: 8px; }
.lang-switch { display: flex; align-items: center; gap: 2px; }
.lang-switch a {
  display: inline-block;
  padding: 6px 10px;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-body);
  border: 1px solid var(--color-border);
  border-radius: 20px;
}
.lang-switch a:hover { color: var(--color-primary); border-color: var(--color-primary); }
.icon-btn {
  display: grid;
  place-items: center;
  width: 40px; height: 40px;
  border: 1px solid var(--color-border);
  background: #fff;
  border-radius: 50%;
  cursor: pointer;
  transition: all var(--transition);
}
.icon-btn:hover { border-color: var(--color-primary); color: var(--color-primary); }
.icon-btn svg { width: 19px; height: 19px; }

/* 移动端汉堡按钮（桌面隐藏） */
.nav-toggle { display: none; }

/* ============================================================
   首页 Hero 头条
   ============================================================ */
.hero {
  padding-block: 28px 0;
}
.hero__grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr;
  gap: 24px;
}

.hero-card {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  min-height: 430px;
  display: flex;
  align-items: flex-end;
  box-shadow: var(--shadow-md);
}
.hero-card img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.hero-card::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(17,24,39,0) 30%, rgba(17,24,39,.88) 100%);
}
.hero-card__body {
  position: relative;
  z-index: 1;
  padding: 28px;
  color: #fff;
}
.hero-card__body h1 { color: #fff; font-family: var(--font-serif); margin-bottom: .4em; }
.hero-card__body h1 a { color: #fff; }
.hero-card__body h1 a:hover { color: #ffd7dc; }
.hero-card__excerpt {
  color: #e5e7eb;
  font-size: 15px;
  max-width: 60ch;
}

/* 侧栏头条列表 */
.hero__aside {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.mini-card {
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 14px;
  align-items: center;
}
.mini-card__thumb {
  border-radius: var(--radius-sm);
  overflow: hidden;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}
.mini-card h3 { font-size: 1rem; margin: 0 0 2px; line-height: 1.35; }
.mini-card h3 a { color: var(--color-ink); }
.mini-card h3 a:hover { color: var(--color-primary); }
.mini-card__meta { font-size: 12px; color: var(--color-muted); }

/* ============================================================
   分类标签 (Category tag)
   ============================================================ */
.cat-tag {
  display: inline-block;
  padding: 2px 10px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .04em;
  text-transform: uppercase;
  color: #fff;
  background: var(--color-primary);
  border-radius: 20px;
}
.cat-tag--gold { background: var(--color-gold); }
.cat-tag--outline {
  background: transparent;
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
}

/* ============================================================
   内容区块标题
   ============================================================ */
.section { padding-block: 40px; }
.section--soft { background: var(--color-bg-soft); }

.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 22px;
  border-bottom: 2px solid var(--color-ink);
  padding-bottom: 10px;
}
.section-head h2 {
  margin: 0;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.35rem;
}
.section-head h2::before {
  content: "";
  width: 8px; height: 22px;
  background: var(--color-primary);
  border-radius: 3px;
}
.section-head a { font-size: 14px; font-weight: 600; color: var(--color-muted); }
.section-head a:hover { color: var(--color-primary); }

/* ============================================================
   新闻卡片网格
   ============================================================ */
.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}
.news-grid--2col {
  grid-template-columns: repeat(2, 1fr);
}
.news-card {
  display: flex;
  flex-direction: column;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition);
}
.news-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.news-card__thumb {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--color-bg-soft);
}
.news-card__thumb img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform .4s ease;
}
.news-card:hover .news-card__thumb img { transform: scale(1.05); }
.news-card__thumb .cat-tag {
  position: absolute;
  top: 12px; left: 12px;
}
.news-card__body {
  display: flex;
  flex-direction: column;
  flex: 1;
  padding: 18px;
}
.news-card__body h3 { font-size: 1.08rem; line-height: 1.4; margin-bottom: 8px; }
.news-card__body h3 a { color: var(--color-ink); }
.news-card__body h3 a:hover { color: var(--color-primary); }
.news-card__excerpt {
  font-size: 14px;
  color: var(--color-muted);
  margin-bottom: 14px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.news-card__meta {
  margin-top: auto;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 12px;
  color: var(--color-muted);
}
.news-card__meta .avatar {
  width: 26px; height: 26px;
  border-radius: 50%;
  object-fit: cover;
}

/* ============================================================
   主布局（侧栏）
   ============================================================ */
.layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 32px;
  padding-block: 32px;
}

/* 侧栏组件 */
.widget {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 22px;
}
.widget__title {
  font-size: 1.05rem;
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--color-bg-soft);
  position: relative;
}
.widget__title::after {
  content: "";
  position: absolute;
  left: 0; bottom: -2px;
  width: 44px; height: 2px;
  background: var(--color-primary);
}

/* 趋势列表 */
.trend-list { list-style: none; margin: 0; padding: 0; counter-reset: trend; }
.trend-list li {
  counter-increment: trend;
  display: flex;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px dashed var(--color-border);
}
.trend-list li:last-child { border-bottom: 0; }
.trend-list li::before {
  content: counter(trend, decimal-leading-zero);
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 1.3rem;
  color: var(--color-faint);
  line-height: 1.2;
}
.trend-list a { color: var(--color-ink); font-weight: 600; font-size: 14px; line-height: 1.4; }
.trend-list a:hover { color: var(--color-primary); }

/* 标签云 */
.tag-cloud { display: flex; flex-wrap: wrap; gap: 8px; }
.tag-cloud a {
  padding: 5px 12px;
  font-size: 13px;
  background: var(--color-bg-soft);
  color: var(--color-body);
  border-radius: 20px;
  transition: all var(--transition);
}
.tag-cloud a:hover { background: var(--color-primary); color: #fff; }

/* 订阅框 */
.newsletter {
  background: var(--color-ink);
  color: #e5e7eb;
  border: none;
}
.newsletter h3 { color: #fff; }
.newsletter p { font-size: 14px; color: #cbd5e1; }
.newsletter form { display: flex; gap: 8px; margin-top: 14px; }
.newsletter input {
  flex: 1;
  min-width: 0;
  padding: 10px 12px;
  border: 1px solid #374151;
  border-radius: var(--radius-sm);
  background: #1f2937;
  color: #fff;
  font-size: 14px;
}
.newsletter input::placeholder { color: #9ca3af; }

/* ============================================================
   按钮
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 18px;
  border: none;
  border-radius: var(--radius-sm);
  background: var(--color-primary);
  color: #fff;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  transition: background var(--transition);
}
.btn:hover { background: var(--color-primary-dark); color: #fff; }
.btn--ghost {
  background: transparent;
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
}
.btn--ghost:hover { background: var(--color-primary); color: #fff; }
.btn--block { width: 100%; }

/* ============================================================
   面包屑导航
   ============================================================ */
.breadcrumb {
  font-size: 13px;
  color: var(--color-muted);
  padding-block: 14px;
  border-bottom: 1px solid var(--color-border);
}
.breadcrumb ol {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0; padding: 0;
}
.breadcrumb li { display: flex; align-items: center; gap: 6px; }
.breadcrumb li + li::before {
  content: "/";
  color: var(--color-faint);
}
.breadcrumb a { color: var(--color-muted); }
.breadcrumb a:hover { color: var(--color-primary); }
.breadcrumb [aria-current="page"] { color: var(--color-ink); font-weight: 600; }

/* ============================================================
   分页
   ============================================================ */
.pagination {
  display: flex;
  justify-content: center;
  gap: 6px;
  margin-top: 34px;
}
.pagination a, .pagination span {
  display: grid;
  place-items: center;
  min-width: 40px;
  height: 40px;
  padding: 0 8px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-body);
  font-weight: 600;
  font-size: 14px;
}
.pagination a:hover { border-color: var(--color-primary); color: var(--color-primary); }
.pagination .is-active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}
.pagination .is-disabled { color: var(--color-faint); pointer-events: none; }

/* ============================================================
   文章详情页
   ============================================================ */
.article { padding-block: 28px 48px; }
.article-header { max-width: 760px; margin-inline: auto; text-align: center; margin-bottom: 28px; }
.article-header h1 {
  font-family: var(--font-serif);
  font-size: clamp(1.9rem, 4vw, 2.7rem);
  line-height: 1.2;
  margin-bottom: 16px;
}
.article-header__excerpt {
  font-size: 1.1rem;
  color: var(--color-muted);
  max-width: 60ch;
  margin-inline: auto;
}
.article-meta {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 18px;
  font-size: 14px;
  color: var(--color-muted);
}
.article-meta .author {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--color-ink);
  font-weight: 600;
}
.article-meta .avatar { width: 34px; height: 34px; border-radius: 50%; }

/* 封面大图 */
.article-cover {
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 32px;
  box-shadow: var(--shadow-md);
}
.article-cover img { width: 100%; aspect-ratio: 21 / 9; object-fit: cover; }
.article-cover figcaption {
  padding: 10px 14px;
  font-size: 13px;
  color: var(--color-muted);
  background: var(--color-bg-soft);
}

/* 正文排版 */
.article-body {
  max-width: 720px;
  margin-inline: auto;
  font-size: 1.05rem;
  line-height: 1.85;
  color: #1f2937;
}
.article-body p { margin-bottom: 1.4em; }
.article-body h2 {
  font-family: var(--font-serif);
  margin: 1.8em 0 .7em;
  font-size: 1.5rem;
}
.article-body h3 { margin: 1.6em 0 .6em; }
.article-body a { text-decoration: underline; text-underline-offset: 3px; }
.article-body img { border-radius: var(--radius-sm); margin: 1.5em 0; }

/* 正文宽内容防溢出（移动端关键） */
.article-body img, .article-body video, .article-body iframe { max-width: 100%; height: auto; }
.article-body table {
  display: block;
  max-width: 100%;
  overflow-x: auto;
  border-collapse: collapse;
  -webkit-overflow-scrolling: touch;
}
.article-body pre, .article-body code {
  max-width: 100%;
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-word;
}
.article-body a { overflow-wrap: anywhere; word-break: break-word; }
.article-body blockquote {
  margin: 1.8em 0;
  padding: 16px 22px;
  border-left: 4px solid var(--color-primary);
  background: var(--color-bg-soft);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-family: var(--font-serif);
  font-size: 1.15rem;
  color: var(--color-ink);
}
.article-body figcaption { font-size: 13px; color: var(--color-muted); text-align: center; }
.article-body ul, .article-body ol { margin-bottom: 1.4em; }
.article-body li { margin-bottom: .4em; }

/* 文章关键词/标签 */
.article-tags {
  max-width: 720px;
  margin: 30px auto 0;
  padding-top: 20px;
  border-top: 1px solid var(--color-border);
}
.article-tags .tag-cloud { margin-top: 8px; }

/* 作者卡片 */
.author-card {
  max-width: 720px;
  margin: 28px auto 0;
  display: flex;
  gap: 16px;
  padding: 20px;
  background: var(--color-bg-soft);
  border-radius: var(--radius);
}
.author-card__avatar { width: 64px; height: 64px; border-radius: 50%; object-fit: cover; }
.author-card h3 { margin-bottom: 4px; }
.author-card p { font-size: 14px; margin: 0; }

/* 分享按钮 */
.share-row {
  max-width: 720px;
  margin: 24px auto 0;
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}
.share-row .btn { padding: 8px 14px; }

/* ============================================================
   相关文章
   ============================================================ */
.related { padding-block: 36px 52px; background: var(--color-bg-soft); }

/* ============================================================
   搜索页
   ============================================================ */
.search-hero {
  background: var(--color-ink);
  color: #fff;
  padding-block: 44px;
}
.search-hero h1 { color: #fff; margin-bottom: 16px; }
.search-form {
  display: flex;
  gap: 10px;
  max-width: 640px;
}
.search-form input {
  flex: 1;
  min-width: 0;
  padding: 14px 18px;
  border: 1px solid #374151;
  border-radius: 40px;
  background: #1f2937;
  color: #fff;
  font-size: 16px;
}
.search-form input::placeholder { color: #9ca3af; }
.search-form .btn { border-radius: 40px; padding: 14px 26px; }
.search-result-count { color: var(--color-muted); font-size: 14px; margin-bottom: 20px; }

/* 搜索结果条目 */
.result-list { list-style: none; margin: 0; padding: 0; }
.result-item {
  padding: 20px 0;
  border-bottom: 1px solid var(--color-border);
}
.result-item h3 { margin-bottom: 6px; }
.result-item h3 a { color: var(--color-ink); }
.result-item h3 a:hover { color: var(--color-primary); }
.result-item__url {
  font-size: 13px;
  color: #15803d;
  margin-bottom: 6px;
  display: block;
}
.result-item__excerpt { font-size: 14px; color: var(--color-muted); margin: 0; }

/* ============================================================
   关于页
   ============================================================ */
.about-hero {
  text-align: center;
  padding-block: 56px;
  background: var(--color-bg-soft);
}
.about-hero h1 { font-family: var(--font-serif); }
.about-hero p { max-width: 60ch; margin-inline: auto; color: var(--color-muted); }
.about-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  padding-block: 40px;
}
.about-card {
  padding: 24px;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  text-align: center;
}
.about-card__icon {
  width: 52px; height: 52px;
  margin: 0 auto 14px;
  display: grid;
  place-items: center;
  border-radius: 14px;
  background: var(--color-bg-soft);
  color: var(--color-primary);
}
.about-card__icon svg { width: 26px; height: 26px; }

/* ============================================================
   页脚
   ============================================================ */
.site-footer {
  background: var(--color-ink);
  color: #cbd5e1;
  padding-block: 48px 0;
  margin-top: 40px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 32px;
  padding-bottom: 36px;
}
.footer-grid > * { min-width: 0; }
.site-footer h3 { color: #fff; font-size: 1rem; margin-bottom: 14px; }
.site-footer p { font-size: 14px; color: #9ca3af; }
.footer-links { list-style: none; margin: 0; padding: 0; }
.footer-links li { margin-bottom: 8px; }
.footer-links a { color: #cbd5e1; font-size: 14px; }
.footer-links a:hover { color: #fff; }
.footer-bottom {
  border-top: 1px solid #1f2937;
  padding-block: 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  font-size: 13px;
  color: #9ca3af;
}
.footer-bottom a { color: #9ca3af; }
.footer-bottom a:hover { color: #fff; }

/* ============================================================
   返回顶部
   ============================================================ */
.back-top {
  position: fixed;
  right: 22px;
  bottom: 22px;
  width: 44px; height: 44px;
  border: none;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  cursor: pointer;
  display: grid;
  place-items: center;
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all var(--transition);
  z-index: 90;
}
.back-top.is-visible { opacity: 1; visibility: visible; transform: translateY(0); }
.back-top:hover { background: var(--color-primary-dark); }
.back-top svg { width: 20px; height: 20px; }

/* ============================================================
   栏目 / 分类 / 标签页
   ============================================================ */
.taxonomy { padding-block: 28px 48px; }
.section-head h1 {
  margin: 0;
  font-size: 1.6rem;
  color: var(--color-ink);
}
.taxonomy__desc {
  color: var(--color-muted);
  margin-bottom: 8px;
}
.taxonomy__count {
  color: var(--color-muted);
  margin-top: -8px;
  margin-bottom: 22px;
}
.taxonomy__terms {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.taxonomy__term {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  background: var(--color-bg-soft);
  color: var(--color-ink);
  border-radius: 30px;
  font-weight: 600;
  transition: all var(--transition);
}
.taxonomy__term:hover {
  background: var(--color-primary);
  color: #fff;
}
.taxonomy__term-count {
  background: #fff;
  color: var(--color-primary);
  font-size: 12px;
  padding: 2px 8px;
  border-radius: 20px;
}
.taxonomy__term:hover .taxonomy__term-count {
  background: rgba(255, 255, 255, .2);
  color: #fff;
}

/* ============================================================
   简单页面（关于我们 / 站内搜索等）
   ============================================================ */
.page-simple { background: var(--color-bg-soft); padding-bottom: 56px; }
.page-simple__inner { max-width: 760px; margin: 0 auto; }
.page-simple__head { text-align: center; padding: 40px 0 24px; }
.page-simple__head h1 {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 800;
  letter-spacing: -.01em;
}
.page-simple__lead {
  margin-top: 12px;
  color: var(--color-text-muted);
  font-size: 16px;
}
.page-simple__body {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 36px 40px;
  line-height: 1.85;
  font-size: 16px;
}
.page-simple__body h2 {
  font-size: 22px;
  font-weight: 700;
  margin: 32px 0 14px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--color-bg-soft);
}
.page-simple__body h2:first-of-type { margin-top: 8px; }
.page-simple__body h3 { font-size: 18px; font-weight: 700; margin: 24px 0 10px; }
.page-simple__body p { margin: 12px 0; }
.page-simple__body ul,
.page-simple__body ol { margin: 12px 0; padding-left: 1.4em; }
.page-simple__body li { margin: 6px 0; }
.page-simple__body table {
  width: 100%;
  border-collapse: collapse;
  margin: 18px 0;
  font-size: 15px;
}
.page-simple__body th,
.page-simple__body td {
  border: 1px solid var(--color-border);
  padding: 10px 12px;
  text-align: left;
}
.page-simple__body th { background: var(--color-bg-soft); font-weight: 700; }
.page-simple__body blockquote {
  margin: 18px 0;
  padding: 12px 18px;
  border-left: 4px solid var(--color-primary);
  background: var(--color-bg-soft);
  color: var(--color-text-muted);
  border-radius: 0 var(--radius) var(--radius) 0;
}
.page-simple__body a { color: var(--color-primary); text-decoration: underline; }

/* 站内搜索 */
.search-lead { color: var(--color-text-muted); margin-bottom: 20px; }
.search-box {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
}
.search-box__input {
  flex: 1;
  padding: 14px 16px;
  font-size: 16px;
  border: 2px solid var(--color-border);
  border-radius: var(--radius);
  outline: none;
  transition: border-color var(--transition);
}
.search-box__input:focus { border-color: var(--color-primary); }
.search-box__count { color: var(--color-text-muted); font-size: 14px; white-space: nowrap; }
.search-results { list-style: none; margin: 0; padding: 0; }
.search-result {
  padding: 16px 0;
  border-bottom: 1px solid var(--color-border);
}
.search-result h3 { font-size: 17px; font-weight: 700; margin: 0 0 6px; }
.search-result h3 a { color: var(--color-text); text-decoration: none; }
.search-result h3 a:hover { color: var(--color-primary); }
.search-result p {
  margin: 0;
  color: var(--color-text-muted);
  font-size: 14px;
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.search-empty { color: var(--color-text-muted); text-align: center; padding: 30px 0; }

/* ============================================================
   响应式
   ============================================================ */
/* 大平板 / 小桌面 */
@media (max-width: 1200px) {
  .news-grid, .news-grid--2col { grid-template-columns: repeat(2, 1fr); }
  .layout { grid-template-columns: 1fr 280px; gap: 24px; }
}

/* 平板 */
@media (max-width: 1024px) {
  .hero__grid { grid-template-columns: 1fr; }
  .hero-card { min-height: 360px; }
  .layout { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .about-grid { grid-template-columns: 1fr 1fr; }
}

/* 手机 */
@media (max-width: 768px) {
  :root { --header-h: 58px; }

  .main-nav {
    position: fixed;
    inset: var(--header-h) 0 0 0;
    background: #fff;
    padding: 16px 20px;
    transform: translateX(100%);
    transition: transform var(--transition);
    overflow-y: auto;
    z-index: 99;
  }
  .main-nav.is-open { transform: translateX(0); }
  .main-nav ul { flex-direction: column; gap: 4px; }
  .main-nav a { padding: 14px; font-size: 16px; border-bottom: 1px solid var(--color-bg-soft); }

  .nav-toggle { display: grid; }
  .news-grid, .news-grid--2col { grid-template-columns: 1fr; }
  .hero-card { min-height: 300px; }
  .hero-card__body { padding: 20px; }
  .hero-card__body h1 { font-size: clamp(1.2rem, 5vw, 1.5rem); }
  .mini-card { grid-template-columns: 88px 1fr; gap: 12px; }
  .section-head { flex-wrap: wrap; gap: 8px; }
  .pagination { flex-wrap: wrap; }
  .footer-grid { grid-template-columns: 1fr; }
  .about-grid { grid-template-columns: 1fr; }
  .search-form { flex-direction: column; }
  .search-form .btn { width: 100%; }
  .article-header { text-align: left; }
  .article-meta { justify-content: flex-start; }
  .article-cover img { aspect-ratio: 16 / 9; }
  .article-body { font-size: 1rem; }
  .author-card { flex-direction: column; text-align: center; }
  .author-card__avatar { margin-inline: auto; }
  .top-bar__inner { justify-content: center; }
  .top-bar__links { display: none; }
  .footer-bottom { justify-content: center; text-align: center; }
}

/* ============================================================
   无障碍：减少动效偏好
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ============================================================
   打印样式
   ============================================================ */
@media print {
  .site-header, .top-bar, .site-footer, .back-top, .newsletter, .share-row {
    display: none !important;
  }
  .article-body { max-width: 100%; }
}

/* ============================================================
   站点地图页
   ============================================================ */
.sitemap-list { list-style: none; margin: 12px 0 0; padding: 0; }
.sitemap-list li { padding: 8px 0; border-bottom: 1px solid var(--color-border); }
.sitemap-list li:last-child { border-bottom: none; }
.sitemap-list a { color: var(--color-text); text-decoration: none; font-weight: 600; }
.sitemap-list a:hover { color: var(--color-primary); }
.sitemap-count { color: var(--color-text-muted); font-size: 13px; }

/* ============================================================
   导航栏修复：英文长菜单自适应（不换行、logo 可收缩）
   ============================================================ */
.site-header__inner { gap: 12px; }
.main-nav { flex: 1 1 auto; min-width: 0; overflow: hidden; }
.main-nav ul { flex-wrap: nowrap; }
.main-nav a { padding: 8px 10px; font-size: 13px; white-space: nowrap; }
.logo { font-size: 1.2rem; }
.header-actions { flex-shrink: 0; }

/* 平板（≤1024px）提前启用汉堡菜单，避免英文长菜单挤压 */
@media (max-width: 1024px) {
  /* 关键修复：去掉 header 的 backdrop-filter，否则它会让子元素 position:fixed 变成相对 header 定位，
     导致抽屉菜单定位错乱、高度塌缩（点开导航看不到内容） */
  .site-header {
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    background: #fff;
  }
  .main-nav {
    position: fixed;
    inset: var(--header-h) 0 0 0;
    background: #fff;
    padding: 16px 20px;
    transform: translateX(100%);
    transition: transform var(--transition);
    overflow-y: auto;
    z-index: 99;
  }
  .main-nav.is-open { transform: translateX(0); }
  .main-nav ul { flex-direction: column; gap: 4px; flex-wrap: nowrap; }
  .main-nav a { padding: 14px; font-size: 16px; border-bottom: 1px solid var(--color-bg-soft); }
  .nav-toggle { display: grid; }
}

/* ============================================================
   响应式溢出修复：grid/flex 项 min-width:0
   （grid 的 1fr 默认 min-width:auto，内容过宽会撑破容器产生横向白边）
   ============================================================ */
.layout > *,
.news-grid > *,
.hero__grid > *,
.footer-grid > *,
.about-grid > * {
  min-width: 0;
}

/* ============ 文章目录 TOC ============ */
.article-toc {
  background: var(--color-bg-soft);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 20px 24px;
  margin: 28px 0;
}
.article-toc h2 {
  font-size: 16px;
  margin: 0 0 14px;
  color: var(--color-ink);
}
.article-toc ul {
  margin: 0;
  padding-left: 20px;
}
.article-toc li {
  margin: 7px 0;
  line-height: 1.55;
}
.article-toc a {
  color: var(--color-body);
  text-decoration: none;
}
.article-toc a:hover {
  color: var(--color-link);
  text-decoration: underline;
}