:root {
  /* ── 底色：三层递进，页面/卡片/悬浮��层次更清晰 ── */
  --bg: #0d1117;
  --surface: rgba(22, 27, 34, 0.72);
  --surface-solid: #161b22;
  --surface-raised: #1c2129;

  /* 边框：默认更淡，hover 时提亮，减少视觉噪音 */
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.16);

  /* 文字：三级灰阶，标题/正文/辅助拉开对比 */
  --text: #e6edf3;
  --text-dim: #9198a1;
  --text-faint: #6a737d;

  /* 国家色：降饱和以免在暗底上刺眼 */
  --cn: #e5534b;
  --us: #4d8ff0;
  --eu: #9b7aea;
  --jp: #f0883e;
  --kr: #2ba8c4;
  --other: #7d8590;

  --accent: #4d8ff0;
  --accent-soft: rgba(77, 143, 240, 0.14);
  --ok: #3fb950;
  --warn: #d29922;
  --danger: #e5534b;

  --radius-sm: 8px;
  --radius: 12px;
  --radius-lg: 16px;
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.45);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

/* 背景图：fixed + cover 让图片钉住不随滚动
   背景色是图片加载完成前的兜底，避免白屏闪烁 */
body {
  min-height: 100vh;
  background-color: var(--bg);
  background-repeat: no-repeat;
  background-position: center center;
  background-attachment: fixed;
  background-size: cover;
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC',
    'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  font-size: 15px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* 顶部渐变遮罩：保证文字在图片上有足够对比度
   上部淡、下部浓 —— 内容区在下方，需要更强的遮盖 */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background: linear-gradient(
    180deg,
    rgba(13, 17, 23, 0.62) 0%,
    rgba(13, 17, 23, 0.42) 25%,
    rgba(13, 17, 23, 0.78) 62%,
    rgba(13, 17, 23, 0.94) 100%
  );
  z-index: -1;
}

.container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 2.5rem 1.25rem 4.5rem;
}

/* ── 顶部信息栏 ────────────────────────────────── */
.topbar {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1.5rem;
  flex-wrap: wrap;
  margin-bottom: 2rem;
}

.brand h1 {
  margin: 0;
  font-size: 1.5rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.brand .sub {
  color: var(--text-dim);
  font-size: 0.875rem;
  margin-top: 0.25rem;
}

.widgets {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

/* 顶部右侧：卡片 + 管理入口按钮 */
.top-right {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
}

.admin-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 8px;
  background: var(--surface);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  color: var(--text-dim);
  flex-shrink: 0;
  transition: color 0.15s, border-color 0.15s, background 0.15s;
}

.admin-btn:hover {
  color: var(--text);
  border-color: rgba(255, 255, 255, 0.28);
  background: rgba(255, 255, 255, 0.1);
}

.widget {
  background: var(--surface);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.75rem 1rem;
  min-width: 150px;
}

.widget .label {
  font-size: 0.75rem;
  color: var(--text-faint);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.widget .value {
  font-size: 1rem;
  margin-top: 0.125rem;
}

.widget .sub {
  font-size: 0.8125rem;
  color: var(--text-dim);
}

.widget-daily .value {
  line-height: 1.5;
  font-size: 0.9375rem;
}

/* ── 壁纸主视觉 ────────────────────��───────────── */
.hero {
  background: var(--surface);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin-bottom: 2rem;
  box-shadow: var(--shadow);
}

.hero-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.hero-title {
  margin: 0;
  font-size: 1.375rem;
  font-weight: 600;
}

.hero-date {
  color: var(--text-dim);
  font-size: 0.875rem;
  margin-top: 0.25rem;
}

.hero-actions {
  display: flex;
  gap: 0.5rem;
}

/* 按钮：半透明玻璃质感，hover 提亮，focus 有可见环 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.375rem;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 0.4375rem 0.8125rem;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-family: inherit;
  font-weight: 500;
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
  transition: background 0.16s, border-color 0.16s, color 0.16s;
}
.btn:hover {
  background: rgba(255, 255, 255, 0.11);
  border-color: var(--border-strong);
  color: #fff;
}
.btn:active {
  background: rgba(255, 255, 255, 0.08);
}
.btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.btn:hover {
  background: rgba(255, 255, 255, 0.14);
}

.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
}

.btn-primary:hover {
  background: #2563eb;
}

.hero-img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: 10px;
  background: rgba(0, 0, 0, 0.3);
  display: block;
}

.hero-copyright {
  margin-top: 0.875rem;
  font-size: 0.8125rem;
  color: var(--text-dim);
  line-height: 1.5;
}

.hero-copyright a {
  color: var(--text-dim);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.hero-copyright a:hover {
  color: var(--text);
}

/* ── 新闻时间线 ────────────────────────────────── */
.news-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.news-head h2 {
  margin: 0;
  font-size: 1.25rem;
  font-weight: 600;
}

/* 国家筛选标签 */
/* 筛选标签：等宽数字 + 明确激活态 */
.filters {
  display: flex;
  gap: 0.4375rem;
  flex-wrap: wrap;
  align-items: center;
}

.chip {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border);
  color: var(--text-dim);
  padding: 0.3125rem 0.75rem;
  border-radius: 999px;
  font-size: 0.8125rem;
  cursor: pointer;
  font-family: inherit;
  transition: all 0.15s;
  white-space: nowrap;
}

.chip:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.12);
}

.chip.active {
  background: var(--text);
  color: var(--bg);
  border-color: var(--text);
  font-weight: 500;
}

.chip .cnt {
  opacity: 0.6;
  margin-left: 0.25rem;
  font-size: 0.75rem;
}

/* 日期分隔条：滚动时吸顶 */
.date-divider {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(13, 17, 23, 0.86);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  margin: 0 -1.25rem 0.875rem;
  padding: 0.625rem 1.25rem;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 0.75rem;
}

.date-divider .d {
  font-weight: 600;
  font-size: 0.9375rem;
  color: var(--accent);
  letter-spacing: 0.01em;
}

.date-divider .c {
  color: var(--text-faint);
  font-size: 0.75rem;
  font-variant-numeric: tabular-nums;
}

/* 地区分组 */
.region {
  margin-bottom: 1.5rem;
}

.region-head {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.6875rem;
  font-weight: 600;
  font-size: 0.875rem;
  color: var(--text);
  letter-spacing: 0.01em;
}

.dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

.dot.domestic { background: var(--cn); }
.dot.US { background: var(--us); }
.dot.EU { background: var(--eu); }
.dot.JP { background: var(--jp); }
.dot.KR { background: var(--kr); }
.dot.OTHER { background: var(--other); }

.country-group {
  margin-bottom: 1rem;
}

.country-head {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: var(--text-dim);
  margin-bottom: 0.5rem;
  padding-left: 0.25rem;
}

/* 新闻卡片 */
.news-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

/* 新闻卡片：左侧色条标识国家分类，hover 时微微右移 */
.news-item {
  display: block;
  position: relative;
  background: var(--surface);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--border);
  border-left: 3px solid var(--other);
  border-radius: var(--radius-sm);
  padding: 0.8125rem 1rem;
  text-decoration: none;
  color: inherit;
  transition: border-color 0.18s, background 0.18s, transform 0.18s;
}
.news-item:hover {
  border-color: var(--border-strong);
  background: rgba(28, 33, 41, 0.9);
  transform: translateX(2px);
}
/* 按国家着色：国内红、美国蓝、欧盟紫、日本橙、韩国青 */
.news-item[data-country='CN'],
.news-item.cn { border-left-color: var(--cn); }
.news-item[data-country='US'],
.news-item.us { border-left-color: var(--us); }
.news-item[data-country='EU'],
.news-item.eu { border-left-color: var(--eu); }
.news-item[data-country='JP'],
.news-item.jp { border-left-color: var(--jp); }
.news-item[data-country='KR'],
.news-item.kr { border-left-color: var(--kr); }

.news-item .t {
  font-size: 0.9375rem;
  line-height: 1.55;
  margin-bottom: 0.3125rem;
  color: var(--text);
  transition: color 0.18s;
}
.news-item:hover .t {
  color: #fff;
}
.news-item .s {
  font-size: 0.8125rem;
  color: var(--text-dim);
  line-height: 1.55;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.news-item .meta {
  display: flex;
  gap: 0.625rem;
  align-items: center;
  margin-top: 0.4375rem;
  font-size: 0.75rem;
  color: var(--text-faint);
}

/* 国家标签：胶囊形，内淡色底 */
.tag {
  display: inline-block;
  padding: 0.125rem 0.5rem;
  border-radius: 999px;
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  line-height: 1.5;
}

/* ── 状态 ────────────────────────────────── */
.loading,
.empty,
.error {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--text-dim);
}

.error {
  color: #f87171;
}

/* 骨架屏：微光扫过。1.8s 一次，不至于刺眼 */
.skeleton {
  background: linear-gradient(
    90deg,
    rgba(255, 255, 255, 0.04) 25%,
    rgba(255, 255, 255, 0.09) 50%,
    rgba(255, 255, 255, 0.04) 75%
  );
  background-size: 200% 100%;
  animation: shimmer 1.8s ease-in-out infinite;
  border: 1px solid var(--border);
  border-left: 3px solid var(--border-strong);
  border-radius: var(--radius-sm);
  height: 62px;
  margin-bottom: 0.625rem;
}

@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* 底部加载提示：三点呼吸，到头后转为静态文字 */
.sentinel {
  text-align: center;
  padding: 2rem 1rem;
  color: var(--text-faint);
  font-size: 0.8125rem;
  letter-spacing: 0.01em;
}
.sentinel:not(.done)::before {
  content: '';
  display: inline-block;
  width: 6px;
  height: 6px;
  margin-right: 0.5rem;
  border-radius: 50%;
  background: var(--accent);
  vertical-align: middle;
  animation: breathe 1.4s ease-in-out infinite;
}
@keyframes breathe {
  0%, 100% { opacity: 0.25; transform: scale(0.8); }
  50% { opacity: 1; transform: scale(1); }
}

.footer {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  font-size: 0.8125rem;
  color: var(--text-faint);
  line-height: 1.7;
}

.footer a {
  color: var(--text-dim);
}

/* ── 移动端 ────────────────────────────────── */
@media (max-width: 768px) {
  .container {
    padding: 1.25rem 0.875rem 3rem;
  }

  .topbar {
    flex-direction: column;
    gap: 1rem;
  }

  .widgets {
    width: 100%;
  }

  .widget {
    flex: 1;
    min-width: 0;
  }

  .hero {
    padding: 1rem;
  }

  .hero-title {
    font-size: 1.125rem;
  }

  .date-divider {
    margin: 0 -0.875rem 1rem;
    padding: 0.625rem 0.875rem;
  }
}
/* ── 无障碍：尊重系统的「减少动效」偏好 ──────────────
   骨架屏微光、呼吸点、卡片位移全部关掉，
   只保留瞬时状态变化。 */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .news-item:hover {
    transform: none;
  }
}

/* ── 焦点可见：键盘导航时给出清晰指示 ────────────── */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 4px;
}

/* ── 数字统一等宽，避免列表里数字跳动 ────────────── */
.count,
.news-item .meta span:last-child,
.date-divider .c {
  font-variant-numeric: tabular-nums;
}

/* ── 关键词 ────────────────────────────── */

/* 热门关键词条：横向可滚动，藏在国家筛选下方 */
.kwbar {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  flex-wrap: wrap;
  padding: 0 0 0.875rem;
  margin-bottom: 0.75rem;
  border-bottom: 1px solid var(--border);
}
.kw-label {
  font-size: 0.75rem;
  color: var(--text-faint);
  margin-right: 0.25rem;
  letter-spacing: 0.02em;
}

/* 热门词条 */
.kw-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.1875rem 0.5rem;
  font-size: 0.75rem;
  font-family: inherit;
  color: var(--text-dim);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border);
  border-radius: 999px;
  cursor: pointer;
  transition: background 0.16s, color 0.16s, border-color 0.16s;
}
.kw-chip:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text);
  border-color: var(--border-strong);
}
.kw-chip.active {
  background: var(--accent-soft);
  color: #7cb3f7;
  border-color: rgba(77, 143, 240, 0.4);
}
.kw-chip .cnt {
  font-size: 0.6875rem;
  color: var(--text-faint);
  font-variant-numeric: tabular-nums;
}
.kw-chip.active .cnt {
  color: #7cb3f7;
}

.kw-clear {
  padding: 0.1875rem 0.5rem;
  font-size: 0.75rem;
  font-family: inherit;
  color: var(--text-faint);
  background: transparent;
  border: 1px dashed var(--border-strong);
  border-radius: 999px;
  cursor: pointer;
}
.kw-clear:hover {
  color: var(--text);
  border-color: var(--text-faint);
}

/* 卡片内的关键词：小一号的胶囊 */
.kws {
  display: flex;
  gap: 0.3125rem;
  flex-wrap: wrap;
  margin-top: 0.4375rem;
}
.kws .kw {
  padding: 0.0625rem 0.4375rem;
  font-size: 0.6875rem;
  font-family: inherit;
  color: var(--text-dim);
  background: rgba(255, 255, 255, 0.055);
  border: 1px solid var(--border);
  border-radius: 999px;
  cursor: pointer;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}
.kws .kw:hover {
  background: var(--accent-soft);
  color: #7cb3f7;
  border-color: rgba(77, 143, 240, 0.35);
}
/* 选中态：与顶部词条呼应 */
.kws .kw.active {
  background: var(--accent-soft);
  color: #7cb3f7;
  border-color: rgba(77, 143, 240, 0.4);
}