/* ========================================================================
   影关英语 · 博客模块共享 CSS（assets/blog.css）
   ----------------------------------------------------------------------
   维护说明：
   - 本文件是博客模块（17 个新页面）共享的样式单一真相源。
   - 每页 head 顶部仍要内联 @font-face + :root（这两块不能提取）。
   - 复用自首页 index.html：玻璃变量、按钮、nav、footer、玻璃卡片样式。
   - 模块新增类：.blog-container / .blog-hero / .blog-wave / .blog-grid /
     .blog-card / .blog-article / .blog-breadcrumb / .blog-cta-card /
     .blog-prev-next / .blog-tag-page / --gradient-{1..5}
   - 依赖：每页必须先在 :root 定义基础变量（参考 blog.html 头部）。
   - 响应式断点：≤1080px（平板 2 列）、≤760px（手机 1 列）。
   ======================================================================== */

/* ─── 5 种封面渐变（架构 §3.3） ─── */
:root {
  --gradient-1: linear-gradient(135deg, #e2f6d5 0%, #cdffad 45%, #9fe870 100%);
  --gradient-2: linear-gradient(135deg, #f7f8f6 0%, #e2f6d5 50%, #cdffad 100%);
  --gradient-3: linear-gradient(135deg, #ffffff 0%, #e2f6d5 60%, #9fe870 100%);
  --gradient-4: linear-gradient(135deg, #f1f3ef 0%, #cdffad 50%, #6e6e73 100%);
  --gradient-5: linear-gradient(135deg, #fff8e7 0%, #e2f6d5 50%, #9fe870 100%);
}

/* ─── 噪点纹理（与首页 body::before 同一份 SVG） ─── */
.blog-noise {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.028;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.72' numOctaves='4' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='180' height='180' filter='url(%23noise)' opacity='1'/%3E%3C/svg%3E");
  background-repeat: repeat;
  background-size: 180px 180px;
}

/* ─── 主容器 ─── */
.blog-container {
  width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

/* ─── Hero 区 ─── */
.blog-hero {
  display: grid;
  gap: 18px;
  justify-items: center;
  text-align: center;
  padding: clamp(72px, 10vw, 152px) 0 clamp(40px, 6vw, 72px);
  max-width: 880px;
  margin: 0 auto;
}
.blog-hero h1 {
  margin: 0;
  color: var(--ink);
  font-size: clamp(36px, 5.6vw, 56px);
  font-weight: 820;
  line-height: 1.12;
  letter-spacing: -0.04em;
}
.blog-hero .blog-lede {
  margin: 0;
  color: rgba(29, 29, 31, 0.66);
  font-size: clamp(17px, 1.9vw, 22px);
  line-height: 1.55;
  max-width: 660px;
}

/* ─── Hero 动态声波（5 根柱子，与首页 audio-wave 同款 keyframes） ─── */
.blog-wave {
  display: flex;
  align-items: flex-end;
  justify-content: center;
  gap: 10px;
  height: 72px;
  margin-top: 14px;
  padding: 0 12px;
}
.blog-wave i {
  display: block;
  width: 6px;
  height: var(--bar, 50%);
  min-height: 18px;
  border-radius: 4px;
  background: #8ad662;
  transform-origin: center bottom;
  animation: waveListen 1.6s ease-in-out infinite alternate;
  animation-delay: calc(var(--wave-i, 0) * -120ms);
}
.blog-wave i:nth-child(odd)  { animation-name: waveListenAlt; animation-duration: 1.5s; }
.blog-wave i:nth-child(even) { animation-name: waveListen;    animation-duration: 1.7s; }
.blog-wave i:nth-child(1) { --wave-i: 0; }
.blog-wave i:nth-child(2) { --wave-i: 1; }
.blog-wave i:nth-child(3) { --wave-i: 2; }
.blog-wave i:nth-child(4) { --wave-i: 3; }
.blog-wave i:nth-child(5) { --wave-i: 4; }

@keyframes waveListen {
  from { transform: scaleY(0.65); opacity: 0.55; }
  to   { transform: scaleY(1.12); opacity: 0.95; }
}
@keyframes waveListenAlt {
  from { transform: scaleY(0.58); opacity: 0.48; }
  to   { transform: scaleY(1.18); opacity: 1; }
}

/* ─── 3×3 文章卡片网格 ─── */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(24px, 3vw, 36px);
  padding: 24px 0 80px;
}
.blog-grid--single {
  grid-template-columns: minmax(0, 640px);
  justify-content: center;
}

/* ─── 玻璃卡片（与首页玻璃变量同款） ─── */
.blog-card {
  position: relative;
  display: grid;
  grid-template-rows: auto auto auto 1fr auto;
  gap: 14px;
  border-radius: var(--radius-lg);
  background: var(--glass-bg-strong);
  box-shadow: var(--glass-box);
  -webkit-backdrop-filter: var(--glass-blur);
  backdrop-filter: var(--glass-blur);
  border: var(--glass-border);
  padding: 18px;
  color: inherit;
  text-decoration: none;
  transition: transform 320ms cubic-bezier(.16, 1, .3, 1),
              box-shadow 320ms cubic-bezier(.16, 1, .3, 1),
              background 220ms ease;
}
.blog-card:hover {
  transform: translate3d(0, -4px, 0);
  background: rgba(255, 255, 255, 0.78);
  box-shadow: var(--glass-box-strong);
}
.blog-card:focus-visible {
  outline: 3px solid rgba(159, 232, 112, 0.34);
  outline-offset: 3px;
}

/* ─── 封面（图片 / 渐变） ─── */
.blog-card-cover {
  position: relative;
  aspect-ratio: 16 / 9;
  border-radius: 16px;
  overflow: hidden;
  background: var(--surface-warm);
}
.blog-card-cover--image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 600ms cubic-bezier(.16, 1, .3, 1);
}
.blog-card:hover .blog-card-cover--image img {
  transform: scale(1.04);
}
.blog-card-cover--gradient {
  display: grid;
  place-items: center;
  font-weight: 820;
  letter-spacing: -0.02em;
  color: rgba(22, 51, 0, 0.34);
  font-size: 22px;
  font-family: var(--font);
}
.blog-card-cover--gradient[data-g="1"] { background: var(--gradient-1); }
.blog-card-cover--gradient[data-g="2"] { background: var(--gradient-2); }
.blog-card-cover--gradient[data-g="3"] { background: var(--gradient-3); }
.blog-card-cover--gradient[data-g="4"] { background: var(--gradient-4); }
.blog-card-cover--gradient[data-g="5"] { background: var(--gradient-5); }

/* ─── Tag chip 行（米绿底深绿字） ─── */
.blog-card-tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.blog-card-tag {
  display: inline-block;
  background: var(--accent-wash);
  color: var(--accent-deep);
  font-size: 12px;
  font-weight: 720;
  letter-spacing: 0.02em;
  padding: 4px 10px;
  border-radius: 999px;
  text-decoration: none;
}

/* ─── 卡片标题 / 摘要 / meta ─── */
.blog-card h3 {
  margin: 0;
  font-size: clamp(18px, 1.4vw, 22px);
  font-weight: 760;
  line-height: 1.3;
  letter-spacing: -0.02em;
  color: var(--ink);
}
.blog-card-excerpt {
  margin: 0;
  color: rgba(29, 29, 31, 0.62);
  font-size: 14px;
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.blog-card-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  border-top: 1px solid var(--line);
  padding-top: 12px;
  color: rgba(29, 29, 31, 0.46);
  font-size: 12px;
  font-weight: 620;
  letter-spacing: 0.02em;
}
.blog-card-meta-sep {
  width: 3px;
  height: 3px;
  border-radius: 999px;
  background: rgba(29, 29, 31, 0.24);
}

/* ─── 详情页正文（max 720px 居中阅读容器） ─── */
.blog-article {
  width: min(720px, calc(100vw - 48px));
  margin: 0 auto;
  padding: clamp(40px, 6vw, 72px) 0 24px;
  position: relative;
  z-index: 1;
}
.blog-breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: rgba(29, 29, 31, 0.46);
  margin-bottom: 24px;
  font-weight: 620;
}
.blog-breadcrumb a {
  color: rgba(29, 29, 31, 0.62);
  text-decoration: none;
  transition: color 180ms ease;
}
.blog-breadcrumb a:hover { color: var(--ink); }
.blog-breadcrumb-sep {
  color: rgba(29, 29, 31, 0.32);
  font-weight: 500;
}
.blog-breadcrumb-current { color: var(--ink); font-weight: 680; }

.blog-article-tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 18px;
}
.blog-article-tag {
  display: inline-block;
  background: var(--accent-wash);
  color: var(--accent-deep);
  font-size: 12px;
  font-weight: 720;
  letter-spacing: 0.02em;
  padding: 5px 11px;
  border-radius: 999px;
  text-decoration: none;
  transition: background 180ms ease;
}
.blog-article-tag:hover {
  background: var(--accent-soft);
}

.blog-article h1 {
  margin: 0 0 16px;
  font-size: clamp(32px, 4.6vw, 48px);
  font-weight: 820;
  line-height: 1.18;
  letter-spacing: -0.035em;
  color: var(--ink);
}
.blog-article-lede {
  margin: 0 0 18px;
  color: rgba(29, 29, 31, 0.66);
  font-size: clamp(17px, 1.7vw, 20px);
  line-height: 1.6;
  font-weight: 540;
}
.blog-article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  color: rgba(29, 29, 31, 0.46);
  font-size: 14px;
  font-weight: 600;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 36px;
}
.blog-article-meta-sep {
  width: 3px;
  height: 3px;
  border-radius: 999px;
  background: rgba(29, 29, 31, 0.24);
}

/* ─── 正文排版 ─── */
.blog-article-body { color: rgba(29, 29, 31, 0.86); }
.blog-article-body h2 {
  margin: 44px 0 16px;
  font-size: clamp(22px, 2.4vw, 28px);
  font-weight: 780;
  line-height: 1.3;
  letter-spacing: -0.02em;
  color: var(--ink);
  scroll-margin-top: 96px;
}
.blog-article-body h3 {
  margin: 32px 0 12px;
  font-size: clamp(17px, 1.7vw, 21px);
  font-weight: 740;
  line-height: 1.4;
  color: var(--ink);
}
.blog-article-body p {
  margin: 0 0 18px;
  font-size: 16px;
  line-height: 1.78;
  color: rgba(29, 29, 31, 0.84);
}
.blog-article-body strong {
  color: var(--ink);
  font-weight: 760;
  background: linear-gradient(transparent 68%, rgba(199, 243, 138, 0.5) 68%);
  padding: 0 1px;
}
.blog-article-body ul,
.blog-article-body ol {
  margin: 0 0 22px;
  padding-left: 22px;
  font-size: 16px;
  line-height: 1.78;
  color: rgba(29, 29, 31, 0.84);
}
.blog-article-body li {
  margin-bottom: 8px;
}
.blog-article-body blockquote {
  margin: 28px 0;
  padding: 16px 20px;
  border-left: 3px solid var(--accent);
  background: var(--accent-wash);
  border-radius: 0 12px 12px 0;
  color: var(--accent-deep);
  font-size: 15px;
  line-height: 1.7;
  font-weight: 600;
}
.blog-article-body blockquote p {
  margin: 0;
  color: var(--accent-deep);
}
.blog-article-body blockquote cite {
  display: block;
  margin-top: 8px;
  color: rgba(22, 51, 0, 0.62);
  font-style: normal;
  font-size: 13px;
  font-weight: 600;
}

/* ─── Callout（提示/警告） ─── */
.blog-callout {
  margin: 28px 0;
  padding: 16px 20px;
  border-radius: 14px;
  border: 1px solid rgba(255, 255, 255, 0.52);
  background: var(--glass-bg-medium);
  box-shadow: var(--glass-box);
  -webkit-backdrop-filter: var(--glass-blur-light);
  backdrop-filter: var(--glass-blur-light);
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink);
}
.blog-callout--tip {
  border-left: 3px solid var(--accent);
  background: var(--accent-wash);
  color: var(--accent-deep);
}
.blog-callout--warning {
  border-left: 3px solid #d97706;
  background: rgba(255, 248, 231, 0.78);
  color: #7a4b00;
}
.blog-callout-label {
  display: block;
  margin-bottom: 4px;
  font-size: 12px;
  font-weight: 760;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  opacity: 0.76;
}

/* ─── 内链样式（跳到其他文章 / tag 页） ─── */
.blog-article-body a,
.blog-cta-card a,
.blog-prev-next a {
  color: var(--accent-deep);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
  text-decoration-color: rgba(22, 51, 0, 0.24);
  transition: text-decoration-color 180ms ease;
}
.blog-article-body a:hover,
.blog-cta-card a:hover,
.blog-prev-next a:hover {
  text-decoration-color: var(--accent-deep);
}

/* ─── 文末 CTA（玻璃卡，与首页 .cta-card 同款气质） ─── */
.blog-cta-card {
  width: min(720px, calc(100vw - 48px));
  margin: 56px auto 32px;
  padding: clamp(36px, 5vw, 56px) clamp(28px, 4vw, 48px);
  border-radius: 32px;
  text-align: center;
  background:
    radial-gradient(circle at 50% 0%, rgba(199, 243, 138, 0.18), transparent 52%),
    rgba(246, 252, 241, 0.52);
  -webkit-backdrop-filter: blur(22px) saturate(160%);
  backdrop-filter: blur(22px) saturate(160%);
  border: 1px solid rgba(255, 255, 255, 0.58);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.88),
    inset 0 -1px 0 rgba(255, 255, 255, 0.24),
    0 24px 64px rgba(20, 28, 16, 0.09),
    0 6px 18px rgba(20, 28, 16, 0.05);
  position: relative;
  z-index: 1;
}
.blog-cta-card h2 {
  margin: 0 0 10px;
  font-size: clamp(24px, 2.6vw, 32px);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--ink);
}
.blog-cta-card p {
  margin: 0 0 22px;
  color: rgba(29, 29, 31, 0.66);
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.6;
}
.blog-cta-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
}

/* ─── 上下篇环形导航 ─── */
.blog-prev-next {
  width: min(720px, calc(100vw - 48px));
  margin: 0 auto 80px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 16px;
  align-items: stretch;
  padding-top: 32px;
  border-top: 1px solid var(--line);
  position: relative;
  z-index: 1;
}
.blog-prev-next a,
.blog-prev-next .blog-prev-next-center {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  border-radius: 16px;
  background: var(--glass-bg-medium);
  -webkit-backdrop-filter: var(--glass-blur-light);
  backdrop-filter: var(--glass-blur-light);
  border: 1px solid rgba(255, 255, 255, 0.42);
  box-shadow: var(--shadow-tight);
  padding: 14px 16px;
  color: var(--ink);
  text-decoration: none;
  font-size: 14px;
  line-height: 1.4;
  transition: transform 240ms cubic-bezier(.16, 1, .3, 1), box-shadow 240ms ease;
}
.blog-prev-next a:hover {
  transform: translate3d(0, -2px, 0);
  box-shadow: var(--shadow-product);
}
.blog-prev-next a:focus-visible,
.blog-article-tag:focus-visible,
.blog-card-tag:focus-visible,
.blog-card:focus-visible {
  outline: 3px solid rgba(159, 232, 112, 0.34);
  outline-offset: 3px;
}
.blog-prev-next .blog-prev-next-center {
  align-self: center;
  text-align: center;
  background: transparent;
  border: 0;
  box-shadow: none;
  -webkit-backdrop-filter: none;
  backdrop-filter: none;
  color: rgba(29, 29, 31, 0.62);
  font-weight: 680;
  font-size: 13px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.blog-prev-next .blog-prev-next-center:hover { transform: none; box-shadow: none; }
.blog-prev-next-label {
  display: block;
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: rgba(29, 29, 31, 0.46);
  font-weight: 720;
}
.blog-prev-next a span:last-child {
  font-weight: 720;
  font-size: 14px;
}
.blog-prev-next-next { text-align: right; align-items: flex-end; }

/* ─── tag 聚合页 ─── */
.blog-tag-page {
  display: grid;
  gap: 14px;
  padding: clamp(72px, 9vw, 124px) 0 32px;
  max-width: 880px;
  margin: 0 auto;
  text-align: center;
}
.blog-tag-page h1 {
  margin: 0;
  font-size: clamp(34px, 4.6vw, 52px);
  font-weight: 820;
  letter-spacing: -0.035em;
  color: var(--ink);
}
.blog-tag-page .blog-tag-page-desc {
  margin: 0 auto;
  color: rgba(29, 29, 31, 0.62);
  font-size: clamp(15px, 1.5vw, 18px);
  line-height: 1.65;
  max-width: 640px;
}
.blog-tag-page .blog-tag-page-kicker {
  margin: 0;
  color: var(--accent-deep);
  font-size: 12px;
  font-weight: 760;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.blog-tag-page .blog-grid {
  padding-top: 24px;
  text-align: left;
}

/* ─── 引导下载条（列表页底部） ─── */
.blog-cta-strip {
  width: var(--container);
  margin: 0 auto 80px;
  padding: 22px 24px;
  border-radius: 20px;
  background: var(--glass-bg-medium);
  -webkit-backdrop-filter: var(--glass-blur-light);
  backdrop-filter: var(--glass-blur-light);
  border: 1px solid rgba(255, 255, 255, 0.42);
  box-shadow: var(--shadow-tight);
  text-align: center;
  font-size: 15px;
  color: rgba(29, 29, 31, 0.72);
  position: relative;
  z-index: 1;
}
.blog-cta-strip a {
  color: var(--accent-deep);
  text-decoration: underline;
  text-underline-offset: 3px;
  font-weight: 720;
  text-decoration-color: rgba(22, 51, 0, 0.24);
}

/* ─── 返回链接（tag 页 / 文末） ─── */
.blog-back-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: rgba(29, 29, 31, 0.62);
  text-decoration: none;
  font-weight: 680;
  letter-spacing: 0.04em;
  margin: 0 0 18px;
  transition: color 180ms ease;
}
.blog-back-link:hover { color: var(--ink); }
.blog-back-link::before {
  content: "←";
  font-weight: 720;
}

/* ─── 返回顶部 ─── */
.back-top {
  position: fixed;
  right: max(18px, calc((100vw - 1180px) / 2 + 18px));
  bottom: max(88px, calc(env(safe-area-inset-bottom) + 72px));
  z-index: 45;
  display: grid;
  width: 48px;
  height: 48px;
  place-items: center;
  padding: 0;
  border: var(--glass-border);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.72);
  color: var(--ink);
  box-shadow: var(--glass-box);
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transform: translate3d(0, 12px, 0) scale(0.96);
  transition: opacity 240ms ease, transform 240ms cubic-bezier(.16, 1, .3, 1), background 220ms ease, box-shadow 220ms ease;
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
}
.back-top::before {
  content: "";
  width: 11px;
  height: 11px;
  border-top: 2px solid currentColor;
  border-left: 2px solid currentColor;
  transform: translateY(3px) rotate(45deg);
}
.back-top.is-visible {
  opacity: 1;
  pointer-events: auto;
  transform: translate3d(0, 0, 0) scale(1);
}
.back-top:hover {
  background: rgba(255, 255, 255, 0.9);
  box-shadow: var(--glass-box-strong);
  transform: translate3d(0, -2px, 0) scale(1);
}
.back-top:active { transform: translate3d(0, 1px, 0) scale(0.98); }
.back-top:focus-visible {
  outline: 3px solid var(--accent-strong);
  outline-offset: 3px;
}

/* ─── footer（与首页同结构，但独立定义以便 blog.css 自包含） ─── */
.blog-footer {
  display: flex;
  width: var(--container);
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin: 0 auto;
  border-top: 1px solid var(--line);
  padding: 28px 24px max(34px, env(safe-area-inset-bottom));
  color: rgba(29, 29, 31, 0.56);
  font-size: 13px;
  position: relative;
  z-index: 1;
}
.blog-footer-links { display: flex; gap: 18px; flex-wrap: wrap; }
.blog-footer-links a {
  color: inherit;
  text-decoration: none;
  transition: color 180ms ease;
}
.blog-footer-links a:hover { color: var(--ink); }
.blog-footer .blog-brand-mini {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-weight: 720;
  letter-spacing: -0.02em;
  text-decoration: none;
}
.blog-footer .blog-brand-mini img {
  width: 24px;
  height: 30px;
  object-fit: contain;
}

/* ─── 响应式 ─── */
@media (max-width: 1080px) {
  .blog-grid { grid-template-columns: repeat(2, 1fr); gap: 22px; }
  .blog-prev-next { grid-template-columns: 1fr 1fr; }
  .blog-prev-next .blog-prev-next-center {
    grid-column: 1 / -1;
    order: 3;
    padding: 6px;
  }
}
@media (max-width: 760px) {
  .blog-grid { grid-template-columns: 1fr; gap: 18px; padding-bottom: 56px; }
  .blog-card { padding: 16px; }
  .blog-card h3 { font-size: 18px; }
  .blog-card-excerpt { -webkit-line-clamp: 2; }
  .blog-article { padding-top: 32px; }
  .blog-article-body p,
  .blog-article-body ul,
  .blog-article-body ol { font-size: 16px; line-height: 1.78; }
  .blog-cta-card { padding: 28px 22px; }
  .blog-cta-actions { flex-direction: column; align-items: stretch; }
  .blog-cta-actions .button-primary,
  .blog-cta-actions .button-secondary { width: 100%; }
  .blog-footer { flex-direction: column; align-items: flex-start; gap: 14px; }
  .blog-wave { height: 56px; gap: 8px; }
  .blog-wave i { width: 5px; min-height: 14px; }
  .blog-tag-page { padding-top: 56px; }
  .back-top { right: 14px; bottom: max(78px, calc(env(safe-area-inset-bottom) + 60px)); width: 44px; height: 44px; border-radius: 15px; }
}

/* ─── prefers-reduced-motion 降级 ─── */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 1ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 1ms !important;
  }
  .blog-wave i { animation: none !important; transform: none !important; }
  .back-top { transition: none !important; }
}

/* ─── prefers-reduced-transparency 降级 ─── */
@media (prefers-reduced-transparency: reduce) {
  .blog-card,
  .blog-callout,
  .blog-cta-card,
  .blog-prev-next a,
  .blog-cta-strip {
    background: rgba(255, 255, 255, 0.98) !important;
    -webkit-backdrop-filter: none !important;
    backdrop-filter: none !important;
  }
  .blog-cta-card { background: rgba(246, 252, 241, 0.98) !important; }
  .blog-callout--tip { background: rgba(226, 246, 213, 0.98) !important; }
  .back-top { background: rgba(251, 253, 248, 0.98); backdrop-filter: none; -webkit-backdrop-filter: none; }
}

/* ─── 按钮（在 blog.css 自包含定义一次，避免依赖 index.html 的内联样式） ─── */
.blog-button-row { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; }
.button-primary,
.button-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 0;
  cursor: pointer;
  text-decoration: none;
  min-height: 52px;
  border-radius: 999px;
  padding: 0 22px;
  font-size: 16px;
  font-weight: 760;
  white-space: nowrap;
  transition: transform 220ms cubic-bezier(.16, 1, .3, 1), box-shadow 220ms ease, background 220ms ease, color 220ms ease;
}
.button-primary {
  background: var(--accent-soft);
  color: var(--accent-strong);
  box-shadow: 0 18px 42px rgba(159, 232, 112, 0.26);
}
.button-primary:hover { transform: translate3d(0, -2px, 0); }
.button-secondary {
  background: rgba(255, 255, 255, 0.58);
  color: var(--ink);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.88),
    inset 0 -1px 0 rgba(255, 255, 255, 0.24),
    0 0 0 1px rgba(29, 29, 31, 0.07),
    0 14px 34px rgba(29, 29, 31, 0.07);
  -webkit-backdrop-filter: blur(18px) saturate(160%);
  backdrop-filter: blur(18px) saturate(160%);
}
.button-secondary:hover {
  background: rgba(255, 255, 255, 0.74);
  transform: translate3d(0, -2px, 0);
}
.button-primary:focus-visible,
.button-secondary:focus-visible {
  outline: 3px solid rgba(159, 232, 112, 0.34);
  outline-offset: 3px;
}