/* ============================================================
   VPNFP 博客系统样式(列表页 + 文章页)
   全部颜色 / 字体 / 圆角自 base.css 设计令牌派生
   ============================================================ */

:root {
  --blog-col: 56rem;
  --hero-pad-x: clamp(1.5rem, 3.5vw, 2rem);
}

.no-break {
  white-space: nowrap;
}

/* ---------- 面包屑(与页头之间留足呼吸) ---------- */
.breadcrumb {
  margin-top: 1.5rem;
  margin-bottom: 1rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
}
.breadcrumb a {
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.15s ease;
}
.breadcrumb a:hover {
  color: var(--accent);
}
.breadcrumb .sep {
  color: var(--border);
}
.breadcrumb .crumb-now {
  color: var(--text);
}

/* ---------- 列表页 hero ---------- */
.blog-hero {
  padding-block: clamp(3rem, 7vw, 4.5rem) clamp(1.25rem, 3vw, 2rem);
}
.blog-kicker {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent);
  text-align: center;
  margin: 0 0 0.9rem;
}
.blog-hero-title {
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 4.5vw, 3rem);
  font-weight: 800;
  letter-spacing: -0.01em;
  line-height: 1.25;
  text-wrap: pretty;
  text-align: center;
  margin: 0;
}
.blog-hero-desc {
  margin: 0.95rem auto 0;
  max-width: 40rem;
  color: var(--text-muted);
  font-size: 1rem;
  line-height: 1.8;
  text-align: center;
}

/* ---------- 标签筛选 ---------- */
.tag-filter {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.55rem;
  margin: 0 0 2rem;
}
.filter-btn {
  font-family: inherit;
  font-size: 0.88rem;
  padding: 0.45rem 1.05rem;
  border-radius: var(--r-pill);
  border: 1px solid var(--border);
  background: var(--bg-panel);
  color: var(--text-muted);
  cursor: pointer;
  transition: color 0.15s ease, border-color 0.15s ease, background 0.15s ease;
}
.filter-btn:hover {
  color: var(--text);
  border-color: color-mix(in srgb, var(--accent) 55%, var(--border));
}
.filter-btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
.filter-btn.is-active {
  background: var(--accent);
  color: var(--ink-on-accent);
  border-color: var(--accent);
  font-weight: 600;
}

/* ---------- 文章卡(列表页) ---------- */
#post-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(19rem, 1fr));
  gap: 1.1rem;
}
#post-list .post-card {
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
  min-width: 0;
  padding: 1.3rem 1.4rem;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-top: 3px solid transparent;
  border-radius: var(--r-m);
  transition: transform 0.18s ease, border-color 0.18s ease;
}
#post-list .post-card:hover {
  transform: translateY(-3px);
  border-top-color: var(--accent);
}
#post-list .post-card .post-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.6rem;
}
#post-list .post-card .post-date {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-muted);
}
#post-list .post-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  line-height: 1.55;
  text-wrap: pretty;
  margin: 0;</think> 0;
}
#post-list .post-card h3 a {
  color: var(--text);
  text-decoration: none;
}
#post-list .post-card h3 a:hover {
  color: var(--accent);
}
#post-list .post-card .post-sum {
  flex-grow: 1;
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--text-muted);
  margin: 0;
}
#post-list .post-card .post-more {
  margin-top: auto;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent);
  text-decoration: none;
}
#post-list .post-card .post-more:hover {
  text-decoration: underline;
}
.blog-empty {
  grid-column: 1 / -1;
  text-align: center;
  color: var(--text-muted);
  padding: 2.5rem 1rem;
}

/* ---------- 阅读列(面包屑 / hero / 正文 / 推广共用同一条居中列) ---------- */
.reading-wrap {
  width: min(100%, calc(var(--blog-col) + 2 * var(--gutter)));
  max-width: calc(var(--blog-col) + 2 * var(--gutter));
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* ---------- 文章 hero:side-rule-card(带框卡 + 左侧竖墨条 + 稿纸纹理) ---------- */
.article-hero {
  position: relative;
  margin: 0;
  padding: clamp(1.6rem, 4vw, 2.6rem) var(--hero-pad-x);
  background: color-mix(in srgb, var(--accent) 6%, var(--bg-panel));
  border: 1px solid var(--border);
  border-radius: var(--r-m);
}
.article-hero::before {
  content: "";
  position: absolute;
  left: 0;
  top: 1.25rem;
  bottom: 1.25rem;
  width: 4px;
  border-radius: var(--r-pill);
  background: linear-gradient(180deg, var(--accent), var(--accent-dark));
  box-shadow: 0 0 12px color-mix(in srgb, var(--accent) 45%, transparent);
}
.article-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  border-radius: inherit;
  background: repeating-linear-gradient(
    180deg,
    transparent 0 27px,
    color-mix(in srgb, var(--accent) 4%, transparent) 27px 28px
  );
  pointer-events: none;
}
.article-hero > * {
  position: relative;
  z-index: 1;
}
.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin: 0 0 1rem;
}
.meta-pill {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  line-height: 1;
  padding: 0.4rem 0.75rem;
  border-radius: var(--r-pill);
  border: 1px solid var(--border);
  color: var(--text-muted);
}
.meta-pill.is-tag {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--ink-on-accent);
  font-weight: 600;
}
.article-title {
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 3.5vw, 2.6rem);
  font-weight: 800;
  letter-spacing: -0.01em;
  line-height: 1.3;
  text-wrap: pretty;
  margin: 0;
}
.article-standfirst {
  margin: 0.9rem 0 0;
  font-size: 1.05rem;
  line-height: 1.75;
  color: var(--text-muted);
}

/* ---------- 文章正文 ---------- */
.article-body {
  margin-top: clamp(1.5rem, 3vw, 2.25rem);
  padding-inline: var(--hero-pad-x);
  font-size: 1rem;
  line-height: 1.85;
  color: var(--text);
  counter-reset: blogsec;
}
.article-body > * {
  min-width: 0;
}
.article-body p {
  margin-block: 1.1em;
}
.article-body a {
  color: var(--accent);
  text-decoration: underline;
  text-decoration-color: color-mix(in srgb, var(--accent) 45%, transparent);
  text-underline-offset: 3px;
}
.article-body a:hover {
  text-decoration-color: var(--accent);
}
.article-body img {
  max-width: 100%;
  height: auto;
  border-radius: var(--r-m);
}
.article-body ul,
.article-body ol {
  margin-block: 1.2em;
  padding-inline-start: 1.5em;
}
.article-body li {
  margin-block: 0.45em;
}
.article-body li::marker {
  color: var(--accent);
}

/* h2:编号徽 + 母题短标线(标题自身保持文档流,不做 flex/grid) */
.article-body h2 {
  counter-increment: blogsec;
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 2.4vw, 1.6rem);
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: -0.01em;
  text-wrap: pretty;
  margin: 2.4em 0 0.9em;
  scroll-margin-top: calc(var(--head-h) + 1rem);
}
.article-body h2::before {
  content: counter(blogsec, decimal-leading-zero);
  display: inline-block;
  vertical-align: 0.14em;
  margin-right: 0.6em;
  padding: 0.12em 0.45em;
  font-family: var(--font-mono);
  font-size: 0.72em;
  font-weight: 600;
  color: var(--accent);
  border: 1px solid color-mix(in srgb, var(--accent) 40%, transparent);
  border-radius: var(--r-s);
}
.article-body h2::after {
  content: "";
  display: block;
  width: 3rem;
  height: 2px;
  margin-top: 0.55em;
  background: linear-gradient(90deg, var(--accent), transparent);
}
.article-body h3 {
  font-family: var(--font-display);
  font-size: clamp(1.12rem, 2vw, 1.3rem);
  font-weight: 700;
  line-height: 1.45;
  text-wrap: pretty;
  margin: 2em 0 0.7em;
  scroll-margin-top: calc(var(--head-h) + 1rem);
}
.article-body h3::before {
  content: "";
  display: inline-block;
  vertical-align: 0.18em;
  width: 0.85em;
  height: 2px;
  margin-right: 0.5em;
  background: var(--accent);
}

/* ---------- 表格:实色表头 + 斑马纹 + hover,窄屏横滑 ---------- */
.article-body table {
  width: 100%;
  margin-block: 1.6rem;
  border-collapse: collapse;
  border: 1px solid var(--border);
  border-radius: var(--r-s);
  overflow: hidden;
  font-size: 0.92rem;
}
.article-body th {
  background: var(--bg-panel2);
  color: var(--text);
  text-align: left;
  font-weight: 600;
  padding: 0.65rem 0.85rem;
  border-bottom: 1px solid var(--border);
}
.article-body td {
  padding: 0.65rem 0.85rem;
  border-bottom: 1px solid var(--line-faint);
  color: var(--text-muted);
}
.article-body tbody tr:nth-child(even) {
  background: color-mix(in srgb, var(--bg-panel) 55%, transparent);
}
.article-body tbody tr:hover {
  background: color-mix(in srgb, var(--accent) 7%, var(--bg-panel));
}
.article-body tbody tr:last-child td {
  border-bottom: none;
}
@media (max-width: 860px) {
  .article-body table {
    display: block;
    width: fit-content;
    max-width: 100%;
    overflow-x: auto;
  }
}

/* ---------- 代码:终端窗(深底浅字 + 红黄绿灯) ---------- */
.article-body pre {
  position: relative;
  margin-block: 1.6rem;
  padding: 2.3rem 1.2rem 1.2rem;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--r-m);
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.88rem;
  line-height: 1.7;
  tab-size: 2;
}
.article-body pre::before {
  content: "";
  position: absolute;
  top: 0.85rem;
  left: 1.2rem;
  width: 0.72rem;
  height: 0.72rem;
  border-radius: 50%;
  background: var(--error);
  box-shadow: 1.1rem 0 0 var(--warn), 2.2rem 0 0 var(--success);
}
.article-body pre code {
  display: block;
  background: none;
  border: none;
  padding: 0;
  color: var(--text);
  font-size: inherit;
}
.article-body code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  padding: 0.1em 0.35em;
  background: color-mix(in srgb, var(--accent) 10%, var(--bg-panel));
  border: 1px solid var(--line-faint);
  border-radius: 4px;
  color: var(--accent);
}

/* ---------- 引用 ---------- */
.article-body blockquote {
  margin-block: 1.5rem;
  padding: 0.4rem 0 0.4rem 1.1rem;
  border-left: 3px solid var(--border);
  color: var(--text-muted);
}

/* ---------- callout:左色条 + 图标徽,warning / success 变体 ---------- */
.article-body .callout,
.callout {
  position: relative;
  margin-block: 1.6rem;
  padding: 1rem 1.2rem 1rem 3rem;
  background: color-mix(in srgb, var(--accent) 6%, var(--bg-panel));
  border: 1px solid color-mix(in srgb, var(--accent) 25%, var(--border));
  border-left: 3px solid var(--accent);
  border-radius: 0 var(--r-m) var(--r-m) 0;
  font-size: 0.95rem;
  line-height: 1.75;
}
.callout::before {
  content: "!";
  position: absolute;
  left: 0.9rem;
  top: 1rem;
  display: grid;
  place-items: center;
  width: 1.4rem;
  height: 1.4rem;
  border-radius: 50%;
  background: var(--accent);
  color: var(--ink-on-accent);
  font-weight: 700;
  font-size: 0.85rem;
  line-height: 1;
}
.callout-warning {
  background: color-mix(in srgb, var(--warn) 8%, var(--bg-panel));
  border-color: color-mix(in srgb, var(--warn) 30%, var(--border));
  border-left-color: var(--warn);
}
.callout-warning::before {
  background: var(--warn);
  color: var(--bg);
}
.callout-success {
  background: color-mix(in srgb, var(--success) 8%, var(--bg-panel));
  border-color: color-mix(in srgb, var(--success) 30%, var(--border));
  border-left-color: var(--success);
}
.callout-success::before {
  content: "✓";
  background: var(--success);
  color: var(--bg);
}

/* ---------- 数据卡网格 ---------- */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(10rem, 1fr));
  gap: 0.9rem;
  margin-block: 1.6rem;
}
.stat-card {
  --stat-c: var(--accent);
  position: relative;
  min-width: 0;
  padding: 1.5rem 1rem 1rem;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--r-m);
  overflow: hidden;
}
.stat-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--stat-c);
}
.stat-card:nth-child(2n) {
  --stat-c: var(--success);
}
.stat-card:nth-child(3n) {
  --stat-c: var(--warn);
}
.stat-num {
  font-family: var(--font-mono);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--stat-c);
  line-height: 1.2;
}
.stat-label {
  margin-top: 0.4rem;
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* ---------- 勾叉清单:只做容器/行卡装饰,不注入任何勾叉符号 ---------- */
.check-list {
  list-style: none;
  margin-block: 1.4rem;
  padding: 0;
  display: grid;
  gap: 0.6rem;
}
.check-list li {
  padding: 0.7rem 0.95rem;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-left: 3px solid color-mix(in srgb, var(--accent) 55%, var(--border));
  border-radius: var(--r-s);
  line-height: 1.7;
}

/* ---------- 结论块 ---------- */
.verdict {
  margin-block: 1.8rem;
  padding: 1.1rem 1.3rem;
  background: color-mix(in srgb, var(--accent) 8%, var(--bg-panel));
  border-left: 3px solid var(--accent);
  border-radius: 0 var(--r-m) var(--r-m) 0;
  font-weight: 500;
  line-height: 1.8;
}

/* ---------- 文末推广块(增强:品牌 tint + 角部光晕,按钮重配色) ---------- */
.promo-block {
  position: relative;
  margin-block: 2.5rem 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.4rem 1.5rem;
  background:
    radial-gradient(120% 160% at 100% 0%, color-mix(in srgb, var(--accent) 18%, transparent), transparent 55%),
    var(--bg-panel);
  border: 1px solid color-mix(in srgb, var(--accent) 40%, var(--border));
  border-radius: var(--r-m);
  overflow: hidden;
}
.promo-block::before {
  content: "";
  position: absolute;
  left: 0;
  top: 1rem;
  bottom: 1rem;
  width: 3px;
  border-radius: var(--r-pill);
  background: linear-gradient(180deg, var(--accent), var(--accent-dark));
}
.promo-block .promo-info {
  min-width: 16rem;
  flex: 1 1 16rem;
}
.promo-block .promo-title {
  font-weight: 700;
  color: var(--text);
  margin: 0;
}
.promo-block .promo-sub {
  margin: 0.3rem 0 0;
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.7;
}
.promo-block .promo-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}
.promo-block .btn-primary {
  background: var(--text);
  color: var(--bg);
  border: 1px solid var(--text);
}
.promo-block .btn-primary:hover {
  background: color-mix(in srgb, var(--text) 92%, var(--accent));
}
.promo-block .btn-ghost {
  color: var(--text);
  border-color: color-mix(in srgb, var(--text) 45%, transparent);
}
.promo-block .btn-ghost:hover {
  border-color: var(--text);
}

/* ---------- 延伸阅读 ---------- */
#related-posts {
  padding-top: 2.5rem;
  padding-bottom: 1rem;
}
#related-posts .related-head {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  margin: 0 0 1rem;
  text-wrap: pretty;
}
#related-posts .related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
  gap: 0.9rem;
}
.related-card {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  min-width: 0;
  padding: 1rem 1.1rem;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-top: 3px solid transparent;
  border-radius: var(--r-m);
  text-decoration: none;
  transition: transform 0.18s ease, border-color 0.18s ease;
}
.related-card:hover {
  transform: translateY(-3px);
  border-top-color: var(--accent);
}
.related-card .related-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
}
.related-card .post-date {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
}
.related-card .related-title {
  font-size: 0.95rem;
  font-weight: 600;
  line-height: 1.55;
  color: var(--text);
  text-wrap: pretty;
}
.related-card:hover .related-title {
  color: var(--accent);
}

/* ---------- 上一篇 / 下一篇 ---------- */
#post-nav {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr));
  gap: 0.9rem;
  padding-top: 1.5rem;
  padding-bottom: 2rem;
}
.post-nav-card {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  min-width: 0;
  padding: 1rem 1.15rem;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--r-m);
  text-decoration: none;
  transition: border-color 0.18s ease, transform 0.18s ease;
}
.post-nav-card:hover {
  border-color: color-mix(in srgb, var(--accent) 60%, var(--border));
  transform: translateY(-2px);
}
.post-nav-card.next {
  text-align: right;
  align-items: flex-end;
}
.post-nav-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
}
.post-nav-title {
  font-size: 0.95rem;
  font-weight: 600;
  line-height: 1.55;
  color: var(--text);
  text-wrap: pretty;
}
.post-nav-card:hover .post-nav-title {
  color: var(--accent);
}

/* ---------- 悬浮 CTA(文章页用;列表页不放此组件) ---------- */
.float-cta {
  position: fixed;
  right: 1.25rem;
  bottom: 1.25rem;
  z-index: 60;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.65rem 1.1rem;
  border-radius: var(--r-pill);
  background: var(--accent);
  color: var(--ink-on-accent);
  font-weight: 600;
  font-size: 0.92rem;
  text-decoration: none;
  box-shadow: 0 6px 24px color-mix(in srgb, var(--accent) 35%, transparent);
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}
.float-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 30px color-mix(in srgb, var(--accent) 45%, transparent);
}
.float-cta svg {
  flex-shrink: 0;
  width: 1em;
  height: 1em;
}
body:has(.float-cta) {
  padding-bottom: 4.5rem;
}
@media (max-width: 640px) {
  .float-cta {
    right: 0.75rem;
    bottom: 0.75rem;
    font-size: 0.85rem;
    padding: 0.55rem 0.95rem;
    max-width: calc(100vw - 1.5rem);
  }
}

/* ---------- 窄屏 ---------- */
@media (max-width: 640px) {
  .breadcrumb {
    margin-top: 1.3rem;
  }
  .tag-filter {
    justify-content: flex-start;
  }
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  .filter-btn,
  #post-list .post-card,
  .related-card,
  .post-nav-card,
  .promo-block .btn-primary,
  .promo-block .btn-ghost,
  .float-cta {
    transition: none;
  }
  #post-list .post-card:hover,
  .related-card:hover,
  .post-nav-card:hover,
  .float-cta:hover {
    transform: none;
  }
}