/* ==========================================================================
   VPNAK 博客样式包 —— 列表页 + 文章页
   全部颜色 / 圆角 / 字体一律引用 base.css 的 :root 设计令牌,不写死色值。
   只被 zh-CN/blog/index.html 与 zh-CN/blog/articles/*.html 引用。
   ========================================================================== */

:root {
  --blog-reading-col: 55rem;
  --blog-rule-gradient: linear-gradient(90deg, var(--apricot), var(--accent) 52%, var(--cobalt));
}

/* --------------------------------------------------------------------------
   1. 阅读列:面包屑 / hero / 正文 / 文末推广共用同一条列并居中
   -------------------------------------------------------------------------- */

.reading-wrap {
  width: 100%;
  max-width: calc(var(--blog-reading-col) + var(--gutter) * 2);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.reading-wrap .prose {
  width: 100%;
  max-width: none;
  margin-inline: 0;
}

/* --------------------------------------------------------------------------
   2. 面包屑:与页头之间保留呼吸空间
   -------------------------------------------------------------------------- */

.crumbs {
  padding-top: 1.5rem;
  font-size: .85rem;
  color: var(--muted);
}
.crumbs .wrap {
  width: 100%;
  max-width: calc(var(--blog-reading-col) + var(--gutter) * 2);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.crumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .45rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.crumbs li {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
}

.crumbs li + li::before {
  content: "/";
  color: var(--border-strong);
}

.crumbs a {
  color: var(--accent);
  text-decoration: none;
}

.crumbs a:hover {
  text-decoration: underline;
}

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

/* --------------------------------------------------------------------------
   3. 列表页 hero
   -------------------------------------------------------------------------- */

.blog-hero {
  position: relative;
  overflow-x: clip;
  padding-block: 2.6rem 2.4rem;
  background: linear-gradient(180deg, var(--hero-top), var(--hero-bottom));
  border-bottom: 1px solid var(--border);
}

.blog-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, var(--grid-line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--grid-line) 1px, transparent 1px);
  background-size: 28px 28px;
  pointer-events: none;
}

.blog-hero::after {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 4px;
  background: var(--blog-rule-gradient);
}

.blog-hero .wrap {
  position: relative;
}

.blog-hero h1 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 4.6vw, 3rem);
  font-weight: 900;
  line-height: 1.16;
  letter-spacing: -0.02em;
  color: var(--text);
  text-wrap: pretty;
}

.blog-hero .lede {
  margin: 1rem 0 0;
  max-width: 46rem;
  font-size: 1.02rem;
  line-height: 1.8;
  color: var(--muted);
}

/* --------------------------------------------------------------------------
   4. 标签筛选
   -------------------------------------------------------------------------- */

.filter-row {
  display: flex;
  flex-wrap: wrap;
  gap: .55rem;
  margin-bottom: 1.6rem;
}

.filter-btn {
  font: inherit;
  font-size: .88rem;
  font-weight: 600;
  padding: .42rem .95rem;
  color: var(--muted);
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: color .16s ease, border-color .16s ease, background-color .16s ease;
}

.filter-btn:hover {
  color: var(--accent-dark);
  border-color: color-mix(in srgb, var(--accent) 45%, var(--border));
}

.filter-btn.is-active,
.filter-btn[aria-pressed="true"] {
  color: var(--bg-panel);
  background: var(--accent-dark);
  border-color: var(--accent-dark);
}

/* --------------------------------------------------------------------------
   5. 文章卡片网格
   -------------------------------------------------------------------------- */

.post-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 290px), 1fr));
  gap: 1.4rem;
}

.post-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: .72rem;
  padding: 1.35rem 1.35rem 1.2rem;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: 0 16px 32px -26px var(--shadow-tint-strong);
  overflow: hidden;
  transition: transform .18s ease, border-color .18s ease, box-shadow .18s ease;
}

.post-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 4px;
  background: var(--blog-rule-gradient);
  opacity: 0;
  transition: opacity .18s ease;
}

.post-card:hover {
  transform: translateY(-2px);
  border-color: color-mix(in srgb, var(--accent) 45%, var(--border));
  box-shadow: 0 24px 44px -28px var(--shadow-tint-strong);
}

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

.reveal.shown {
  opacity: 1;
}

.post-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .55rem;
  margin: 0;
  font-family: var(--font-mono);
  font-size: .78rem;
  color: var(--muted);
}

.post-card h3 {
  margin: 0;
  font-size: 1.12rem;
  font-weight: 800;
  line-height: 1.52;
  letter-spacing: -0.01em;
  color: var(--text);
  text-wrap: pretty;
}

.post-card h3 a {
  color: inherit;
  text-decoration: none;
}

.post-card h3 a:hover {
  color: var(--accent-dark);
}

.post-card .post-sum {
  margin: 0;
  font-size: .92rem;
  line-height: 1.78;
  color: var(--muted);
}

.post-more {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  margin-top: auto;
  padding-top: .2rem;
  font-size: .9rem;
  font-weight: 600;
  color: var(--accent);
  text-decoration: none;
}

.post-more:hover {
  color: var(--accent-dark);
}

.post-empty {
  grid-column: 1 / -1;
  margin: 0;
  padding: 2rem 1.2rem;
  text-align: center;
  color: var(--muted);
  background: var(--bg-panel);
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius-md);
}

/* --------------------------------------------------------------------------
   6. 文章页 hero(split-meta:左 3/4 标题摘要 + 右 1/4 竖向 meta 卡)
   -------------------------------------------------------------------------- */

.article-hero {
  position: relative;
  overflow-x: clip;
  padding-block: 2.2rem 2.4rem;
  background: linear-gradient(180deg, var(--hero-top), var(--hero-bottom));
  border-bottom: 1px solid var(--border);
}

.article-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, var(--grid-line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--grid-line) 1px, transparent 1px);
  background-size: 28px 28px;
  pointer-events: none;
}

.article-hero::after {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 4px;
  background: var(--blog-rule-gradient);
}

.article-hero .wrap {
  position: relative;
  width: 100%;
  max-width: calc(var(--blog-reading-col) + var(--gutter) * 2);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.article-hero-grid {
  display: grid;
  grid-template-columns: 3fr 1fr;
  gap: 2rem;
  align-items: start;
}

.article-hero-main h1 {
  margin: 0 0 .9rem;
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3.4vw, 2.6rem);
  font-weight: 900;
  line-height: 1.24;
  letter-spacing: -0.02em;
  color: var(--text);
  text-wrap: pretty;
}

.article-hero-main .article-sum {
  margin: 0;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--muted);
}

.article-meta-card {
  display: flex;
  flex-direction: column;
  gap: .85rem;
  padding: 1.1rem 1.15rem;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: 0 14px 30px -26px var(--shadow-tint-strong);
}

.article-meta-card .meta-label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--muted);
}

.article-meta-row {
  display: flex;
  flex-direction: column;
  gap: .2rem;
  padding-top: .8rem;
  border-top: 1px solid var(--border);
}

.article-meta-row:first-of-type {
  padding-top: 0;
  border-top: 0;
}

.article-meta-row .meta-key {
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .06em;
  color: var(--muted);
}

.article-meta-row .meta-val {
  font-size: .92rem;
  font-weight: 600;
  color: var(--text);
}

.article-meta-row .meta-val.is-tag {
  display: inline-flex;
  align-self: flex-start;
  padding: .2rem .6rem;
  font-size: .8rem;
  color: var(--bg-panel);
  background: var(--accent-dark);
  border-radius: var(--radius-pill);
}

.article-meta-row .meta-val.is-mono {
  font-family: var(--font-mono);
  font-weight: 500;
}

/* --------------------------------------------------------------------------
   7. 正文排版
   -------------------------------------------------------------------------- */

.article-body {
  padding-block: 2.4rem 1.2rem;
}

.prose {
  font-size: 1rem;
  line-height: 1.85;
  color: var(--text);
}

.prose > * + * {
  margin-top: 1.05rem;
}

.prose p {
  margin: 0;
}

.prose h2 {
  position: relative;
  margin: 2.3rem 0 0;
  padding-left: .85rem;
  font-family: var(--font-display);
  font-size: clamp(1.3rem, 2.2vw, 1.6rem);
  font-weight: 800;
  line-height: 1.4;
  letter-spacing: -0.015em;
  color: var(--text);
  text-wrap: pretty;
  counter-increment: blog-sec;
}

.prose h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: .18em;
  bottom: .18em;
  width: 4px;
  border-radius: var(--radius-pill);
  background: var(--blog-rule-gradient);
}

.prose h2::after {
  content: "0" counter(blog-sec);
  position: absolute;
  right: 0;
  top: .3em;
  font-family: var(--font-mono);
  font-size: .72rem;
  font-weight: 500;
  letter-spacing: .1em;
  color: color-mix(in srgb, var(--muted) 62%, transparent);
}

.prose {
  counter-reset: blog-sec;
}

.prose h3 {
  margin: 1.7rem 0 0;
  font-size: clamp(1.06rem, 1.6vw, 1.3rem);
  font-weight: 800;
  line-height: 1.5;
  letter-spacing: -0.01em;
  color: var(--text);
  text-wrap: pretty;
}

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

.prose li + li {
  margin-top: .45rem;
}

.prose li::marker {
  color: var(--accent);
}

.prose a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}

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

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

.prose blockquote {
  margin: 1.4rem 0 0;
  padding: .95rem 1.1rem;
  font-size: .96rem;
  color: var(--muted);
  background: var(--bg-panel2);
  border-left: 4px solid var(--accent);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.prose blockquote p {
  margin: 0;
}

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

.prose code {
  font-family: var(--font-mono);
  font-size: .88em;
  padding: .12em .38em;
  color: var(--accent-dark);
  background: var(--accent-soft);
  border-radius: 6px;
  overflow-wrap: anywhere;
}

/* 终端窗代码块 */
.prose pre {
  position: relative;
  margin: 1.5rem 0 0;
  padding: 2.1rem 1.15rem 1.1rem;
  overflow-x: auto;
  background: var(--text);
  border: 1px solid var(--text);
  border-radius: var(--radius-md);
  box-shadow: 0 18px 34px -30px var(--ink-shadow);
}

.prose pre::before {
  content: "";
  position: absolute;
  left: 1.1rem;
  top: .85rem;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--error);
  box-shadow: 15px 0 0 var(--warn), 30px 0 0 var(--success);
}

.prose pre::after {
  content: "terminal";
  position: absolute;
  right: 1.1rem;
  top: .72rem;
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .1em;
  color: color-mix(in srgb, var(--bg-panel) 55%, transparent);
}

.prose pre code {
  display: block;
  padding: 0;
  font-size: .86rem;
  line-height: 1.7;
  color: var(--bg-panel);
  background: none;
  border-radius: 0;
  white-space: pre;
}

/* --------------------------------------------------------------------------
   8. 表格:实色表头 + 斑马纹 + hover;窄屏横滑
   -------------------------------------------------------------------------- */

.prose table,
.prose .data-table {
  width: 100%;
  margin: 1.5rem 0 0;
  border-collapse: collapse;
  font-size: .92rem;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.prose thead th {
  padding: .72rem .85rem;
  text-align: left;
  font-weight: 700;
  color: var(--bg-panel);
  background: var(--text);
  border-bottom: 1px solid var(--text);
}

.prose tbody td {
  padding: .68rem .85rem;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}

.prose tbody tr:nth-child(even) {
  background: var(--bg-panel2);
}

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

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

.table-scroll {
  margin: 1.5rem 0 0;
  overflow-x: auto;
}

.table-scroll > table {
  margin: 0;
  min-width: 32rem;
}

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

/* --------------------------------------------------------------------------
   9. 正文组件:数据卡 / 勾叉清单 / 结论块 / callout
   -------------------------------------------------------------------------- */

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 200px), 1fr));
  gap: .9rem;
  margin: 1.5rem 0 0;
}

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

.stat-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 4px;
  background: var(--accent);
}

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

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

.stat-card:nth-child(2n) {
  background: color-mix(in srgb, var(--accent-soft) 55%, var(--bg-panel));
}

.stat-card .stat-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1.25;
  color: var(--text);
}

.stat-card .stat-label {
  display: block;
  margin-top: .35rem;
  font-size: .86rem;
  line-height: 1.65;
  color: var(--muted);
}

.check-list {
  margin: 1.4rem 0 0;
  padding: 0;
  list-style: none;
}

.check-list li {
  padding: .7rem .95rem;
  font-size: .95rem;
  line-height: 1.75;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}

.check-list li + li {
  margin-top: .5rem;
}

.check-list li:hover {
  border-color: color-mix(in srgb, var(--accent) 40%, var(--border));
}

.verdict {
  margin: 1.5rem 0 0;
  padding: .95rem 1.1rem;
  font-size: .96rem;
  line-height: 1.8;
  color: var(--text);
  background: color-mix(in srgb, var(--accent-soft) 70%, var(--bg-panel));
  border-left: 4px solid var(--accent);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

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

.callout {
  position: relative;
  margin: 1.5rem 0 0;
  padding: 1rem 1.1rem 1rem 3rem;
  font-size: .95rem;
  line-height: 1.8;
  color: var(--text);
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-left: 4px solid var(--cobalt);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.callout::before {
  content: "i";
  position: absolute;
  left: .95rem;
  top: 1rem;
  display: grid;
  place-items: center;
  width: 1.35rem;
  height: 1.35rem;
  font-family: var(--font-mono);
  font-size: .8rem;
  font-weight: 700;
  color: var(--bg-panel);
  background: var(--cobalt);
  border-radius: 50%;
}

.callout p {
  margin: 0;
}

.callout.warn {
  border-left-color: var(--warn);
  background: color-mix(in srgb, var(--warn) 9%, var(--bg-panel));
}

.callout.warn::before {
  content: "!";
  background: var(--warn);
}

.callout.success {
  border-left-color: var(--success);
  background: color-mix(in srgb, var(--success) 9%, var(--bg-panel));
}

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

/* --------------------------------------------------------------------------
   10. 文末推广卡(全站唯一转化块)
   -------------------------------------------------------------------------- */

.promo-block {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.1rem;
  margin: 2.4rem 0 0;
  padding: 1.4rem 1.5rem;
  color: var(--bg-panel);
  background: linear-gradient(120deg, var(--text) 0%, var(--accent-dark) 58%, var(--accent) 100%);
  border-radius: var(--radius-lg);
  box-shadow: 0 22px 42px -30px var(--shadow-tint-strong);
  overflow: hidden;
}

.promo-block::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 4px;
  background: linear-gradient(90deg, var(--apricot), var(--bg-panel) 50%, var(--cobalt));
}

.promo-block .pb-txt {
  position: relative;
  min-width: 14rem;
  flex: 1 1 16rem;
}

.promo-block .pb-brand {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 900;
  letter-spacing: .04em;
}

.promo-block .pb-line {
  margin: .35rem 0 0;
  font-size: .92rem;
  line-height: 1.75;
  color: color-mix(in srgb, var(--bg-panel) 84%, transparent);
}

.promo-block .btn-primary {
  color: var(--text);
  background: var(--bg-panel);
  border-color: var(--bg-panel);
}

.promo-block .btn-primary:hover {
  color: var(--text);
  background: var(--bg-panel2);
  border-color: var(--bg-panel2);
}

.promo-block .btn-secondary {
  color: var(--bg-panel);
  background: transparent;
  border-color: color-mix(in srgb, var(--bg-panel) 55%, transparent);
}

.promo-block .btn-secondary:hover {
  color: var(--text);
  background: var(--bg-panel);
  border-color: var(--bg-panel);
}

/* --------------------------------------------------------------------------
   11. 延伸阅读 / 上一篇下一篇(垫距合计 ≤5rem,避免空洞)
   -------------------------------------------------------------------------- */

#related-posts {
  display: block;
  padding-top: 1.6rem;
}

#post-nav {
  display: block;
  padding-bottom: 2rem;
}

.rel-head,
#post-nav .rel-head {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--text);
}

.rel-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 240px), 1fr));
  gap: 1rem;
}

.rel-card {
  display: flex;
  flex-direction: column;
  gap: .55rem;
  padding: 1.05rem 1.1rem;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: transform .16s ease, border-color .16s ease, box-shadow .16s ease;
}

.rel-card:hover {
  transform: translateY(-2px);
  border-color: color-mix(in srgb, var(--accent) 48%, var(--border));
  box-shadow: 0 18px 34px -28px var(--shadow-tint-strong);
}

.rel-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .5rem;
  margin: 0;
  font-family: var(--font-mono);
  font-size: .74rem;
  color: var(--muted);
}

.rel-title {
  margin: 0;
  font-size: .95rem;
  font-weight: 700;
  line-height: 1.6;
  color: var(--text);
}

.post-nav-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 240px), 1fr));
  gap: 1rem;
}

.post-nav-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: .4rem;
  padding: 1rem 1.1rem;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: transform .16s ease, border-color .16s ease;
}

.post-nav-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  border-radius: var(--radius-md) var(--radius-md) 0 0;
  background: var(--blog-rule-gradient);
  opacity: 0;
  transition: opacity .16s ease;
}

.post-nav-card:hover {
  transform: translateY(-2px);
  border-color: color-mix(in srgb, var(--accent) 48%, var(--border));
}

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

.post-nav-kind {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .08em;
  color: var(--accent);
}

.post-nav-title {
  margin: 0;
  font-size: .94rem;
  font-weight: 700;
  line-height: 1.6;
  color: var(--text);
}

/* --------------------------------------------------------------------------
   12. 注册引导弹窗
   -------------------------------------------------------------------------- */

.signup-modal {
  position: fixed;
  inset: 0;
  z-index: 90;
  display: grid;
  place-items: center;
  padding: 1.2rem;
  background: color-mix(in srgb, var(--text) 62%, transparent);
  opacity: 0;
  transition: opacity .22s ease;
}

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

.signup-modal-panel {
  position: relative;
  width: 100%;
  max-width: 26rem;
  padding: 1.6rem 1.5rem 1.5rem;
  text-align: center;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: 0 30px 60px -32px var(--ink-shadow);
  transform: translateY(10px) scale(.985);
  transition: transform .22s ease;
}

.signup-modal.is-open .signup-modal-panel {
  transform: translateY(0) scale(1);
}

.signup-modal-panel::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 4px;
  background: var(--blog-rule-gradient);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.signup-modal-close {
  position: absolute;
  top: .7rem;
  right: .7rem;
  display: grid;
  place-items: center;
  width: 2rem;
  height: 2rem;
  color: var(--muted);
  background: var(--bg-panel2);
  border: 1px solid var(--border);
  border-radius: 50%;
  cursor: pointer;
  transition: color .16s ease, border-color .16s ease;
}

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

.signup-modal-brand {
  margin: 0;
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .14em;
  color: var(--accent);
}

.signup-modal-title {
  margin: .6rem 0 0;
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 800;
  line-height: 1.5;
  letter-spacing: -0.01em;
  color: var(--text);
  text-wrap: pretty;
}

.signup-modal-text {
  margin: .6rem 0 1.2rem;
  font-size: .92rem;
  line-height: 1.75;
  color: var(--muted);
}

.signup-modal-cta {
  display: inline-flex;
}

/* --------------------------------------------------------------------------
   13. 悬浮 CTA(文章页专用样式;列表页不放)
   -------------------------------------------------------------------------- */

.float-cta {
  position: fixed;
  right: 1.1rem;
  bottom: 1.1rem;
  z-index: 60;
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  padding: .6rem 1.05rem;
  font-size: .9rem;
  font-weight: 700;
  color: var(--bg-panel);
  background: var(--accent-dark);
  border: 1px solid var(--accent-dark);
  border-radius: var(--radius-pill);
  box-shadow: 0 18px 34px -22px var(--shadow-tint-strong);
  text-decoration: none;
  transition: transform .16s ease, background-color .16s ease;
}

.float-cta:hover {
  transform: translateY(-2px);
  background: var(--accent);
  border-color: var(--accent);
}

.float-cta svg {
  flex: none;
}

@media (max-width: 640px) {
  .float-cta {
    right: .8rem;
    bottom: .8rem;
    padding: .5rem .85rem;
    font-size: .84rem;
  }
}

/* --------------------------------------------------------------------------
   14. 响应式与动效降级
   -------------------------------------------------------------------------- */

@media (max-width: 900px) {
  .article-hero-grid {
    grid-template-columns: 1fr;
    gap: 1.2rem;
  }

  .article-meta-card {
    order: -1;
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
    gap: .5rem 1.1rem;
  }

  .article-meta-card .meta-label {
    flex-basis: 100%;
  }

  .article-meta-row {
    padding-top: 0;
    border-top: 0;
    flex-direction: row;
    align-items: center;
    gap: .45rem;
  }
}

@media (max-width: 640px) {
  .blog-hero,
  .article-hero {
    padding-block: 1.8rem 1.7rem;
  }

  .reading-wrap {
    padding-inline: var(--gutter);
  }

  .prose h2::after {
    display: none;
  }

  .promo-block {
    padding: 1.2rem 1.15rem;
  }

  .signup-modal-panel {
    padding: 1.4rem 1.15rem 1.2rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .post-card,
  .rel-card,
  .post-nav-card,
  .float-cta,
  .signup-modal,
  .signup-modal-panel {
    transition: none;
  }

  .post-card:hover,
  .rel-card:hover,
  .post-nav-card:hover,
  .float-cta:hover {
    transform: none;
  }
}