/* ==========================================================================
   VPNDH 博客样式包：列表页（blog/index.html）与文章页（blog/articles/*）
   颜色、字体、圆角、阴影一律引用 base.css 的 :root 令牌，不新增色值。
   ========================================================================== */

:root {
  /* 与 components.css 的 .prose max-width(760px) 取同值：
     面包屑 / hero / 正文共用同一条阅读列，正文不再在列内二次居中 */
  --blog-reading: 47.5rem;
}

/* 阅读列：面包屑 / hero / 正文 / 文末推广共用同一条列并居中 */
.reading-wrap {
  box-sizing: border-box;
  width: 100%;
  max-width: calc(var(--blog-reading) + 2 * var(--gutter));
  margin-inline: auto;
  padding-inline: max(var(--gutter), 1.5rem);
}

/* ---------- 列表页 Hero ---------- */

.blog-hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(2.25rem, 5vw, 3.5rem) clamp(1.5rem, 3vw, 2.25rem);
  border-bottom: 1px solid var(--border);
  background:
    radial-gradient(120% 100% at 92% -20%, var(--accent-06), transparent 62%),
    linear-gradient(180deg, var(--bg-panel-3), var(--bg) 78%);
}

.blog-glyph {
  position: absolute;
  font-family: var(--font-mono);
  font-size: clamp(3rem, 9vw, 6.5rem);
  line-height: 1;
  color: var(--ink-06);
  pointer-events: none;
  user-select: none;
}

.bg-1 {
  top: 1rem;
  left: 3%;
}

.bg-2 {
  top: 2.25rem;
  right: 9%;
}

.bg-3 {
  bottom: -0.5rem;
  left: 42%;
}

.blog-hero .reading-wrap {
  position: relative;
  z-index: 1;
}

.blog-title {
  margin: 0.55rem 0 0;
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 4.4vw, 3rem);
  font-weight: 900;
  line-height: 1.16;
  letter-spacing: -0.015em;
  color: var(--text);
  text-wrap: pretty;
  max-width: 22ch;
}

.blog-sub {
  margin: 1rem 0 0;
  max-width: 44rem;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--text-muted);
}

/* ---------- 标签筛选 ---------- */

.tag-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1.75rem;
}

.tag-btn {
  appearance: none;
  border: 1px solid var(--border);
  background: var(--bg-panel);
  color: var(--text-muted);
  font-family: var(--font-body);
  font-size: 0.875rem;
  line-height: 1.4;
  padding: 0.45rem 0.95rem;
  border-radius: var(--r-pill);
  cursor: pointer;
  transition: color 0.18s ease, border-color 0.18s ease, background-color 0.18s ease, transform 0.18s ease;
}

.tag-btn:hover {
  color: var(--text);
  border-color: var(--accent-28);
  transform: translateY(-1px);
}

.tag-btn.is-active {
  background: var(--accent);
  border-color: var(--accent-dark);
  color: var(--bg-panel);
  box-shadow: var(--shadow-soft);
}

.tag-btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* ---------- 列表主体 ---------- */

.blog-list {
  padding-block: clamp(1.5rem, 3vw, 2.25rem) clamp(3rem, 6vw, 4.5rem);
}

.list-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.0625rem;
  font-weight: 700;
  letter-spacing: 0;
  color: var(--text);
  text-wrap: pretty;
}

.list-count {
  margin: 0.35rem 0 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.02em;
  color: var(--text-muted);
}

.blog-post-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 20rem), 1fr));
  gap: 1.25rem;
}

.blog-post-grid .post-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  padding: 1.5rem;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  box-shadow: var(--shadow-card), var(--edge-light);
  color: inherit;
  text-decoration: none;
  overflow: hidden;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.blog-post-grid .post-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-warm));
  opacity: 0;
  transition: opacity 0.2s ease;
}

.blog-post-grid .post-card:hover {
  transform: translateY(-3px);
  border-color: var(--accent-28);
  box-shadow: var(--shadow-float), var(--edge-light);
}

.blog-post-grid .post-card:hover::before {
  opacity: 1;
}

.blog-post-grid .post-card:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.blog-post-grid .post-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.post-tag,
.related-tag {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.6rem;
  border-radius: var(--r-pill);
  background: var(--accent-12);
  color: var(--accent-dark);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.blog-post-grid .post-date {
  font-family: var(--font-mono);
  letter-spacing: 0.02em;
}

.blog-post-grid .post-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: 700;
  line-height: 1.45;
  letter-spacing: -0.01em;
  color: var(--text);
  text-wrap: pretty;
}

.blog-post-grid .post-sum {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--text-muted);
}

.blog-post-grid .post-more {
  margin-top: auto;
  padding-top: 0.35rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--accent);
}

.post-empty {
  margin: 0;
  padding: 1.25rem 1.35rem;
  border: 1px dashed var(--border);
  border-radius: var(--r-md);
  color: var(--text-muted);
  font-size: 0.9375rem;
}

.noscript-list {
  margin: 1.5rem 0 0;
  padding-left: 1.2rem;
  color: var(--text-muted);
  line-height: 1.9;
}

.noscript-list a {
  color: var(--accent-dark);
}

/* ---------- 面包屑 ---------- */

.breadcrumb {
  margin-top: 1.5rem;
  margin-bottom: 0;
  padding-top: 0;
  font-size: 0.875rem;
  color: var(--text-muted);
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.breadcrumb li {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  min-width: 0;
}

.breadcrumb li + li::before {
  content: "›";
  color: var(--ink-24);
  font-family: var(--font-mono);
}

.breadcrumb a {
  color: var(--text-muted);
  text-decoration: none;
}

.breadcrumb a:hover {
  color: var(--accent-dark);
  text-decoration: underline;
  text-underline-offset: 0.18em;
}

.breadcrumb [aria-current="page"] {
  color: var(--text);
  font-weight: 600;
}

/* ---------- 文章 Hero：split-meta ---------- */

.article-hero {
  position: relative;
  padding-block: clamp(1.25rem, 2.5vw, 2rem) clamp(1.5rem, 3vw, 2.25rem);
  border-bottom: 1px solid var(--border);
  background: linear-gradient(180deg, var(--bg-panel-3), transparent 76%);
}

.article-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 3fr) minmax(0, 1fr);
  gap: 2rem 2.5rem;
  align-items: start;
}

.article-hero-main {
  min-width: 0;
}

.article-title {
  margin: 0.6rem 0 0;
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3.2vw, 2.6rem);
  font-weight: 900;
  line-height: 1.24;
  letter-spacing: -0.015em;
  color: var(--text);
  text-wrap: pretty;
}

.article-sum {
  margin: 0.9rem 0 0;
  max-width: 44rem;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--text-muted);
}

.article-meta-card {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  min-width: 0;
  padding: 1rem 1.1rem;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  box-shadow: var(--shadow-soft), var(--edge-light);
}

.meta-item {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  min-width: 0;
}

.meta-item + .meta-item {
  padding-top: 0.85rem;
  border-top: 1px dashed var(--border);
}

.meta-k {
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--text-muted);
}

.meta-v {
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1.5;
  color: var(--text);
}

.meta-v.mono {
  font-family: var(--font-mono);
  font-weight: 500;
}

@media (max-width: 860px) {
  .article-hero-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 1.25rem;
  }

  .article-meta-card {
    order: -1;
    flex-direction: row;
    flex-wrap: wrap;
    gap: 0.75rem 1.25rem;
  }

  .meta-item + .meta-item {
    padding-top: 0;
    padding-left: 1.25rem;
    border-top: 0;
    border-left: 1px dashed var(--border);
  }
}

/* ---------- 正文排版 ---------- */

.prose {
  counter-reset: h2;
  padding-block: clamp(1.5rem, 3vw, 2.25rem) 0;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.85;
  color: var(--text);
}

/* 正文列在阅读容器内水平居中（.prose 自带 max-width，缺 auto 会整条贴左） */
.reading-wrap > .prose {
  margin-inline: auto;
}

.prose > * + * {
  margin-top: 1.1rem;
}

.prose > :first-child {
  margin-top: 0;
}

.prose p {
  margin: 0;
}

.prose h2 {
  counter-increment: h2;
  margin-top: 2.4rem;
  padding-top: 1.1rem;
  border-top: 1px solid var(--border);
  font-family: var(--font-display);
  font-size: clamp(1.3rem, 2.2vw, 1.6rem);
  font-weight: 800;
  line-height: 1.38;
  letter-spacing: -0.01em;
  color: var(--text);
  text-wrap: pretty;
}

.prose h2::before {
  content: counter(h2, decimal-leading-zero);
  display: inline-block;
  margin-right: 0.6rem;
  padding: 0.1rem 0.4rem;
  border: 1px solid var(--accent-20);
  border-radius: var(--r-xs);
  background: var(--accent-08);
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  line-height: 1.2;
  vertical-align: 0.18em;
}

.prose h3 {
  margin-top: 1.8rem;
  font-family: var(--font-display);
  font-size: 1.1875rem;
  font-weight: 700;
  line-height: 1.45;
  letter-spacing: -0.005em;
  color: var(--text);
  text-wrap: pretty;
}

.prose ul,
.prose ol {
  margin: 0;
  padding-left: 1.35rem;
}

.prose li + li {
  margin-top: 0.45rem;
}

.prose a {
  color: var(--accent-dark);
  text-decoration: underline;
  text-underline-offset: 0.18em;
}

.prose a:hover {
  color: var(--accent);
}

.prose strong {
  font-weight: 700;
  color: var(--text);
}

.prose blockquote {
  margin: 1.5rem 0;
  padding: 1rem 1.25rem;
  background: var(--bg-panel-3);
  border-left: 3px solid var(--accent);
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
  color: var(--text-muted);
}

.prose blockquote p {
  margin: 0;
}

.prose hr {
  margin: 2rem 0;
  border: 0;
  border-top: 1px dashed var(--border);
}

/* ---------- 正文表格 ---------- */

.table-scroll {
  max-width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.prose table {
  width: 100%;
  border-collapse: collapse;
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  background: var(--bg-panel);
  font-size: 0.9375rem;
  line-height: 1.7;
}

.prose thead th {
  padding: 0.7rem 0.85rem;
  background: var(--bg-panel-2);
  border-bottom: 1px solid var(--border);
  color: var(--text);
  font-weight: 700;
  text-align: left;
  white-space: nowrap;
}

.prose tbody td {
  padding: 0.7rem 0.85rem;
  border-bottom: 1px solid var(--border);
  color: var(--text-muted);
  vertical-align: top;
}

.prose tbody tr:nth-child(even) {
  background: var(--bg-panel-3);
}

.prose tbody tr:hover {
  background: var(--accent-04);
}

.prose tbody tr:last-child td {
  border-bottom: 0;
}

@media (max-width: 860px) {
  .prose table {
    display: block;
    width: fit-content;
    max-width: 100%;
    overflow-x: auto;
  }
}

/* ---------- 终端窗代码块 ---------- */

.prose pre {
  position: relative;
  margin: 1.5rem 0;
  padding: 2rem 1.15rem 1.15rem;
  background: var(--band);
  color: var(--band-text);
  border-radius: var(--r-md);
  box-shadow: var(--shadow-soft);
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  line-height: 1.7;
}

.prose pre::before {
  content: "";
  position: absolute;
  top: 0.8rem;
  left: 1rem;
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0.9rem 0 0 var(--warn), 1.8rem 0 0 var(--success);
}

.prose pre code {
  padding: 0;
  background: none;
  color: inherit;
  font-family: inherit;
  font-size: inherit;
}

.prose code {
  padding: 0.1rem 0.35rem;
  border-radius: var(--r-xs);
  background: var(--bg-panel-2);
  color: var(--accent-dark);
  font-family: var(--font-mono);
  font-size: 0.875em;
}

/* ---------- Callout ---------- */

.callout {
  position: relative;
  margin: 1.6rem 0;
  padding: 1rem 1.15rem 1rem 3rem;
  background: var(--bg-panel-3);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: var(--r-sm);
}

.callout::before {
  content: "!";
  position: absolute;
  top: 1rem;
  left: 0.9rem;
  display: grid;
  place-items: center;
  width: 1.35rem;
  height: 1.35rem;
  border-radius: 50%;
  background: var(--accent-12);
  color: var(--accent-dark);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 700;
}

.callout-title {
  display: block;
  margin-bottom: 0.25rem;
  font-weight: 700;
  color: var(--text);
}

.callout p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--text-muted);
}

.callout.is-warning {
  background: color-mix(in srgb, var(--warn) 8%, var(--bg-panel));
  border-left-color: var(--warn);
}

.callout.is-warning::before {
  background: var(--warn-10);
  color: var(--warn);
}

.callout.is-success {
  background: color-mix(in srgb, var(--success) 8%, var(--bg-panel));
  border-left-color: var(--success);
}

.callout.is-success::before {
  content: "✓";
  background: var(--success-10);
  color: var(--success);
}

/* ---------- 数据卡网格 ---------- */

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 12rem), 1fr));
  gap: 0.85rem;
  margin: 1.6rem 0;
}

.stat-card {
  position: relative;
  padding: 1rem 1.1rem 1.05rem;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  box-shadow: var(--shadow-soft);
  overflow: hidden;
}

.stat-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: var(--accent);
}

.stat-card:nth-child(2n) {
  background: var(--accent-04);
}

.stat-card:nth-child(2n)::before {
  background: var(--accent-warm);
}

.stat-card:nth-child(3n)::before {
  background: var(--text-muted);
}

.stat-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1.2;
  color: var(--text);
}

.stat-label {
  display: block;
  margin-top: 0.25rem;
  font-size: 0.8125rem;
  line-height: 1.6;
  color: var(--text-muted);
}

/* ---------- 勾叉清单（只做行卡，不注入任何符号） ---------- */

.prose ul.check-list {
  display: grid;
  gap: 0.5rem;
  margin: 1.4rem 0;
  padding-left: 0;
  list-style: none;
}

.check-list li {
  margin: 0;
  padding: 0.7rem 0.9rem;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--text-muted);
  transition: border-color 0.18s ease, background-color 0.18s ease;
}

.check-list li:hover {
  border-color: var(--accent-20);
  background: var(--bg-panel-3);
}

/* ---------- 结论块 ---------- */

.verdict {
  margin: 1.7rem 0;
  padding: 1rem 1.15rem;
  background: var(--accent-04);
  border-left: 3px solid var(--accent);
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
  font-size: 0.96875rem;
  line-height: 1.8;
  color: var(--text);
}

.verdict strong:first-child {
  color: var(--accent-dark);
}

/* ---------- 文末推广块 ---------- */

.promo-block {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem 1.5rem;
  margin-top: clamp(2rem, 4vw, 2.75rem);
  padding: clamp(1.25rem, 2.5vw, 1.75rem);
  border-radius: var(--r-lg);
  background: linear-gradient(135deg, var(--band-hi), var(--band) 68%);
  color: var(--band-text);
  box-shadow: var(--shadow-float);
  overflow: hidden;
}

.promo-block::after {
  content: "";
  position: absolute;
  right: -2.5rem;
  bottom: -3.5rem;
  width: 13rem;
  height: 13rem;
  border: 1px dashed var(--band-line);
  border-radius: 50%;
  opacity: 0.55;
  pointer-events: none;
}

.promo-body {
  position: relative;
  z-index: 1;
  min-width: 0;
}

.promo-brand {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.18em;
  color: var(--accent-warm);
}

.promo-text {
  margin: 0.4rem 0 0;
  max-width: 38rem;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--band-muted);
}

.promo-block .btn {
  position: relative;
  z-index: 1;
}

.promo-block .btn-primary {
  background: var(--bg-panel);
  background-image: none;
  border: 1px solid var(--bg-panel);
  color: var(--accent-dark);
  box-shadow: none;
}

.promo-block .btn-primary:hover {
  background: var(--bg-panel-3);
}

.promo-block .btn-ghost {
  border-color: var(--band-line);
  color: var(--band-text);
}

.promo-block .btn-ghost:hover {
  border-color: var(--band-text);
  background: var(--ink-08);
}

/* ---------- 延伸阅读 ---------- */

#related-posts {
  margin-top: 2.25rem;
  padding-block: 0;
}

.related-title {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-size: 1.0625rem;
  font-weight: 700;
  line-height: 1.4;
  color: var(--text);
  text-wrap: pretty;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 15rem), 1fr));
  gap: 0.85rem;
}

.related-card {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  min-width: 0;
  padding: 1rem 1.1rem;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  color: inherit;
  text-decoration: none;
  transition: border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.related-card:hover {
  border-color: var(--accent-28);
  transform: translateY(-2px);
  box-shadow: var(--shadow-card);
}

.related-card:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.related-card .related-tag {
  align-self: flex-start;
}

.related-card-title {
  display: block;
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1.55;
  color: var(--text);
}

.related-date {
  display: block;
  margin-top: auto;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.02em;
  color: var(--text-muted);
}

/* ---------- 上一篇 / 下一篇 ---------- */

#post-nav {
  margin-top: 2.25rem;
  padding-block: 0;
}

.post-nav {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.85rem;
}

.post-nav.is-single {
  grid-template-columns: minmax(0, 1fr);
}

.post-nav.is-empty {
  display: none;
}

.post-nav-card {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  min-width: 0;
  padding: 1rem 1.1rem;
  background: var(--bg-panel-3);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  color: inherit;
  text-decoration: none;
  transition: border-color 0.2s ease, background-color 0.2s ease, transform 0.2s ease;
}

.post-nav-card:hover {
  border-color: var(--accent-28);
  background: var(--bg-panel);
  transform: translateY(-2px);
}

.post-nav-card:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.post-nav-card.is-next {
  align-items: flex-end;
  text-align: right;
}

.post-nav.is-single .post-nav-card.is-next {
  align-items: flex-start;
  text-align: left;
}

.pn-k {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}

.pn-title {
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1.5;
  color: var(--text);
}

@media (max-width: 640px) {
  .post-nav {
    grid-template-columns: minmax(0, 1fr);
  }

  .post-nav-card.is-next {
    align-items: flex-start;
    text-align: left;
  }
}

/* ---------- 右下角悬浮 CTA（文章页使用，列表页不放） ---------- */

.float-cta {
  position: fixed;
  right: clamp(0.75rem, 2.5vw, 1.75rem);
  bottom: clamp(0.75rem, 2.5vw, 1.75rem);
  z-index: 60;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  max-width: calc(100% - 1.5rem);
  padding: 0.7rem 1.15rem;
  border-radius: var(--r-pill);
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  color: var(--bg-panel);
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 600;
  line-height: 1.3;
  text-decoration: none;
  box-shadow: var(--shadow-cta), var(--edge-light);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.float-cta:hover {
  transform: translateY(-2px);
}

.float-cta:focus-visible {
  outline: 2px solid var(--accent-dark);
  outline-offset: 3px;
}

.float-cta svg {
  flex: none;
  width: 1rem;
  height: 1rem;
}

@media (max-width: 640px) {
  .float-cta {
    padding: 0.6rem 0.9rem;
    font-size: 0.8125rem;
  }
}

/* ---------- 文末注册引导弹窗 ---------- */

body.modal-open {
  overflow: hidden;
}

.signup-modal {
  position: fixed;
  inset: 0;
  z-index: 120;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.25rem;
}

.signup-modal[hidden] {
  display: none;
}

.signup-modal-mask {
  position: absolute;
  inset: 0;
  background: color-mix(in srgb, var(--text) 52%, transparent);
  opacity: 0;
  transition: opacity 0.22s ease;
}

.signup-modal-panel {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 26rem;
  max-height: calc(100vh - 2.5rem);
  overflow-y: auto;
  padding: clamp(1.5rem, 4vw, 2rem);
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-float);
  opacity: 0;
  transform: translateY(10px) scale(0.98);
  transition: opacity 0.22s ease, transform 0.22s ease;
}

.signup-modal.is-open .signup-modal-mask {
  opacity: 1;
}

.signup-modal.is-open .signup-modal-panel {
  opacity: 1;
  transform: none;
}

.signup-modal-close {
  position: absolute;
  top: 0.6rem;
  right: 0.6rem;
  display: grid;
  place-items: center;
  width: 2rem;
  height: 2rem;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: var(--r-pill);
  background: var(--bg-panel-3);
  color: var(--text-muted);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1;
  cursor: pointer;
  transition: color 0.18s ease, border-color 0.18s ease, background-color 0.18s ease;
}

.signup-modal-close:hover {
  color: var(--accent);
  border-color: var(--accent-28);
  background: var(--accent-04);
}

.signup-modal-close:focus-visible,
.signup-modal-later:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.signup-modal-brand {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  color: var(--accent);
}

.signup-modal-title {
  margin: 0.5rem 0 0;
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 800;
  line-height: 1.42;
  letter-spacing: -0.01em;
  color: var(--text);
  text-wrap: pretty;
}

.signup-modal-text {
  margin: 0.6rem 0 1.25rem;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--text-muted);
}

.signup-modal-later {
  display: block;
  width: 100%;
  margin-top: 0.6rem;
  padding: 0.5rem;
  border: 0;
  border-radius: var(--r-sm);
  background: none;
  font-family: var(--font-body);
  font-size: 0.8125rem;
  color: var(--text-muted);
  cursor: pointer;
}

.signup-modal-later:hover {
  color: var(--text);
}

/* ---------- 响应式收口 ---------- */

@media (max-width: 768px) {
  .blog-glyph {
    display: none;
  }

  .blog-title {
    max-width: none;
  }
}

@media (max-width: 640px) {
  .blog-post-grid .post-card {
    padding: 1.25rem;
  }

  .tag-filter {
    gap: 0.4rem;
  }

  .tag-btn {
    font-size: 0.8125rem;
    padding: 0.4rem 0.8rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .tag-btn,
  .blog-post-grid .post-card,
  .check-list li,
  .related-card,
  .post-nav-card,
  .float-cta,
  .signup-modal-mask,
  .signup-modal-panel {
    transition: none;
  }

  .tag-btn:hover,
  .blog-post-grid .post-card:hover,
  .related-card:hover,
  .post-nav-card:hover,
  .float-cta:hover {
    transform: none;
  }

  .signup-modal-panel {
    transform: none;
  }
}