/* =====================================================
   VPNHP 博客系统样式(列表页 + 文章页)
   颜色 / 字体 / 圆角 / 阴影全部引用 base.css 设计令牌
   ===================================================== */

/* ---------- 防断词兜底 ---------- */
.no-break {
  white-space: nowrap;
}

/* ---------- 阅读列:52~57rem,正文盒与 hero 同衬对齐 ---------- */
.reading-wrap {
  --blog-col: 56rem;
  --blog-inset: clamp(1.5rem, 4vw, 2rem);
  width: 100%;
  max-width: calc(var(--blog-col) + 2 * var(--gutter));
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* ---------- 面包屑(与页头留呼吸空间 ≥1.2rem) ---------- */
.crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem;
  margin: 1.6rem 0 1.4rem;
  font-size: 0.86rem;
  color: var(--text-muted);
}
.crumbs a {
  color: var(--text-muted);
  text-decoration: none;
}
.crumbs a:hover {
  color: var(--accent-dark);
  text-decoration: underline;
}
.crumbs .crumb-sep {
  color: var(--border);
}
.crumbs [aria-current="page"] {
  color: var(--text);
  font-weight: 600;
}

/* =====================================================
   列表页
   ===================================================== */
.blog-list-wrap {
  width: 100%;
  max-width: 74rem;
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.blog-hero {
  padding-top: clamp(1rem, 3vw, 2rem);
  padding-bottom: 0.4rem;
}
.blog-kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0 0 0.9rem;
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--accent-dark);
}
.blog-kicker::before {
  content: "";
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 50%;
  background: var(--grad-sunrise);
}
.blog-hero h1 {
  margin: 0 0 0.8rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.9rem, 4.5vw, 3rem);
  line-height: 1.18;
  letter-spacing: -0.02em;
  text-wrap: pretty;
}
.blog-hero-desc {
  margin: 0;
  max-width: 44rem;
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--text-muted);
}

/* ---------- 标签筛选 ---------- */
.tag-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  padding-top: 1.2rem;
  padding-bottom: 2rem;
}
.filter-btn {
  appearance: none;
  border: 1px solid var(--border);
  background: var(--bg-panel);
  color: var(--text-muted);
  font: 600 0.9rem/1 var(--font-body);
  padding: 0.58rem 1.1rem;
  border-radius: 999px;
  cursor: pointer;
  transition: color 0.18s ease, border-color 0.18s ease, background-color 0.18s ease;
}
.filter-btn:hover {
  border-color: var(--accent-line);
  color: var(--accent-dark);
}
.filter-btn.is-active {
  background: var(--grad-sunrise);
  border-color: transparent;
  color: var(--bg-panel);
}

/* ---------- 文章卡网格 ---------- */
.blog-post-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(19rem, 1fr));
  gap: 1.4rem;
  padding-bottom: clamp(3rem, 7vw, 4.5rem);
}
.post-card {
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
  padding: 1.4rem 1.4rem 1.25rem;
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}
.post-card:hover {
  transform: translateY(-3px);
  border-color: var(--accent-line);
  box-shadow: var(--shadow-pop);
}
.post-card h3 {
  margin: 0;
  font-size: 1.12rem;
  line-height: 1.5;
  text-wrap: pretty;
}
.post-card h3 a {
  color: var(--text);
  text-decoration: none;
}
.post-card h3 a:hover {
  color: var(--accent-dark);
}
.post-sum {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.75;
  color: var(--text-muted);
}
.post-more {
  margin-top: auto;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--accent-dark);
  text-decoration: none;
}
.post-more:hover {
  text-decoration: underline;
}
.post-more::after {
  content: " →";
}
.blog-empty {
  margin: 0;
  padding-top: 1rem;
  padding-bottom: 3rem;
  color: var(--text-muted);
}

/* =====================================================
   文章页 Hero:stamp-corner 图章角标卡
   ===================================================== */
.article-hero {
  position: relative;
  margin-top: 0.4rem;
  padding: clamp(1.8rem, 4.5vw, 2.8rem) var(--blog-inset);
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-l);
  box-shadow: var(--shadow-card);
}
/* 圆形双圈图章:细双圈边框 + 品牌缩写,旋转 -12° */
.article-hero::after {
  content: "VPNHP";
  position: absolute;
  top: 1.3rem;
  right: 1.5rem;
  display: grid;
  place-items: center;
  width: 5.4rem;
  height: 5.4rem;
  border: 2px solid var(--accent);
  border-radius: 50%;
  box-shadow:
    inset 0 0 0 0.3rem var(--bg-panel),
    inset 0 0 0 0.42rem var(--accent);
  background: color-mix(in srgb, var(--accent) 7%, transparent);
  color: var(--accent);
  font: 800 0.82rem/1.35 var(--font-display);
  letter-spacing: 0.1em;
  text-align: center;
  transform: rotate(-12deg);
  opacity: 0.9;
  pointer-events: none;
}
@media (max-width: 640px) {
  .article-hero::after {
    top: 1rem;
    right: 1rem;
    width: 4.2rem;
    height: 4.2rem;
    font-size: 0.66rem;
    letter-spacing: 0.06em;
  }
}

/* 元信息胶囊行:左对齐紧凑排列 */
.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin: 0 0 1.1rem;
  font-size: 0.84rem;
}
.meta-pill {
  display: inline-flex;
  align-items: center;
  padding: 0.32rem 0.75rem;
  border-radius: 999px;
  font-weight: 600;
}
.meta-pill.is-tag {
  background: var(--accent-soft);
  border: 1px solid var(--accent-line);
  color: var(--accent-dark);
}
.meta-pill.is-plain {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  color: var(--text-muted);
}

.article-hero h1 {
  margin: 0 0 1rem;
  max-width: 46rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.7rem, 4vw, 2.6rem);
  line-height: 1.22;
  letter-spacing: -0.02em;
  text-wrap: pretty;
}
.article-lead {
  margin: 0;
  max-width: 44rem;
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--text-muted);
}

/* =====================================================
   文章正文(与 hero 同衬对齐,字号克制)
   ===================================================== */
.article-body {
  padding: clamp(1.6rem, 4vw, 2.4rem) var(--blog-inset) 1rem;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--text);
  counter-reset: blog-h2;
  overflow-wrap: break-word;
}
.article-body p {
  margin: 0 0 1.15em;
}
.article-body a {
  color: var(--accent-dark);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* h2:编号徽 + 母题短标线(标题自身保持文档流,不用 flex/grid) */
.article-body h2 {
  margin: 2.4em 0 0.9em;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.32rem, 2.6vw, 1.6rem);
  line-height: 1.35;
  letter-spacing: -0.015em;
  text-wrap: pretty;
  counter-increment: blog-h2;
}
.article-body h2::before {
  content: counter(blog-h2, decimal-leading-zero);
  display: inline-block;
  min-width: 2.1em;
  margin-right: 0.6rem;
  padding: 0.12em 0.38em;
  border-radius: var(--radius-s);
  background: var(--accent-soft);
  border: 1px solid var(--accent-line);
  color: var(--accent-dark);
  font: 700 0.62em/1.4 var(--font-mono);
  letter-spacing: 0.04em;
  text-align: center;
  vertical-align: 0.18em;
}
.article-body h2::after {
  content: "";
  display: block;
  width: 2.6rem;
  height: 3px;
  margin-top: 0.65rem;
  border-radius: 2px;
  background: var(--grad-sunrise);
}
.article-body h3 {
  margin: 1.9em 0 0.7em;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.1rem, 2vw, 1.3rem);
  line-height: 1.4;
  text-wrap: pretty;
}
.article-body h3::before {
  content: "";
  display: inline-block;
  width: 0.5rem;
  height: 0.5rem;
  margin-right: 0.5rem;
  border-radius: 2px;
  background: var(--accent);
  vertical-align: 0.12em;
}

.article-body ul,
.article-body ol {
  margin: 0 0 1.2em;
  padding-left: 1.5em;
}
.article-body li {
  margin-bottom: 0.5em;
}

.article-body blockquote {
  margin: 1.6em 0;
  padding: 1rem 1.3rem;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-left: 4px solid var(--accent);
  border-radius: var(--radius-s);
  color: var(--text-muted);
}
.article-body blockquote p:last-child {
  margin-bottom: 0;
}

.article-body code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  padding: 0.15em 0.45em;
  border-radius: 6px;
  background: var(--bg-panel2);
  border: 1px solid var(--border);
}

/* pre:深底浅字终端窗(红黄绿灯角标) */
.article-body pre {
  position: relative;
  margin: 1.6em 0;
  padding: 2.4rem 1.3rem 1.3rem;
  background: var(--text);
  color: color-mix(in srgb, var(--bg) 88%, white);
  border-radius: var(--radius-m);
  box-shadow: var(--shadow-card);
  overflow-x: auto;
}
.article-body pre::before {
  content: "";
  position: absolute;
  top: 0.85rem;
  left: 1.15rem;
  width: 0.68rem;
  height: 0.68rem;
  border-radius: 50%;
  background: var(--error);
  box-shadow: 1.05rem 0 0 var(--warn), 2.1rem 0 0 var(--success);
}
.article-body pre code {
  padding: 0;
  background: none;
  border: none;
  font-size: 0.86rem;
  line-height: 1.7;
  color: inherit;
}

/* 表格:实色表头 + 斑马纹 + hover 行,窄屏横滑 */
.article-body table {
  width: 100%;
  max-width: 100%;
  margin: 1.6em 0;
  border-collapse: collapse;
  border: 1px solid var(--border);
  border-radius: var(--radius-s);
  overflow: hidden;
  font-size: 0.94rem;
  line-height: 1.6;
}
.article-body th {
  padding: 0.7rem 0.9rem;
  background: var(--text);
  color: var(--bg-panel);
  font-weight: 700;
  text-align: left;
}
.article-body td {
  padding: 0.68rem 0.9rem;
  border-top: 1px solid var(--border);
  vertical-align: top;
}
/* 首列标签(核查维度等)不许被挤成一字一行竖排 */
.article-body th:first-child,
.article-body td:first-child {
  min-width: 6.5em;
}
.article-body tbody tr:nth-child(even) {
  background: color-mix(in srgb, var(--bg-panel2) 55%, transparent);
}
.article-body tbody tr:hover {
  background: var(--accent-soft);
}
@media (max-width: 860px) {
  .article-body table {
    display: block;
    width: 100%;
    overflow-x: auto;
  }
}

/* ---------- 数据卡网格(stat-grid) ---------- */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(10rem, 1fr));
  gap: 1rem;
  margin: 1.8em 0;
}
.stat-card {
  position: relative;
  padding: 1.5rem 1.1rem 1.1rem;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-m);
  overflow: hidden;
}
.stat-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--accent);
}
.stat-card:nth-child(3n + 2)::before {
  background: var(--grad-sunrise);
}
.stat-card:nth-child(3n)::before {
  background: var(--success);
}
.stat-card:nth-child(3n + 2) {
  background: color-mix(in srgb, var(--accent-soft) 60%, var(--bg-panel));
}
.stat-card:nth-child(3n) {
  background: color-mix(in srgb, var(--success-soft) 55%, var(--bg-panel));
}
.stat-num {
  display: block;
  margin-bottom: 0.35rem;
  font: 700 1.7rem/1.2 var(--font-mono);
  font-variant-numeric: tabular-nums;
  color: var(--accent-dark);
}
.stat-card:nth-child(3n) .stat-num {
  color: var(--success);
}
.stat-label {
  font-size: 0.86rem;
  line-height: 1.5;
  color: var(--text-muted);
}

/* ---------- 勾叉清单:仅做行卡装饰,勾叉符号由 li 文本携带 ---------- */
.check-list {
  list-style: none;
  margin: 1.5em 0;
  padding: 0;
  display: grid;
  gap: 0.6rem;
}
.check-list li {
  padding: 0.8rem 1.05rem;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-s);
  line-height: 1.75;
}

/* ---------- 结论块 ---------- */
.verdict {
  margin: 1.8em 0;
  padding: 1.15rem 1.35rem;
  background: linear-gradient(90deg, var(--accent-soft), transparent 70%);
  border-left: 5px solid var(--accent);
  border-radius: var(--radius-s);
}
.verdict strong {
  color: var(--accent-dark);
}

/* ---------- callout:左色条 + 图标徽,warning / success 变体 ---------- */
.callout {
  position: relative;
  margin: 1.6em 0;
  padding: 1.05rem 1.25rem 1.05rem 3.1rem;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-left: 4px solid var(--accent);
  border-radius: var(--radius-s);
  font-size: 0.97rem;
}
.callout::before {
  content: "i";
  position: absolute;
  top: 1.05rem;
  left: 0.85rem;
  display: grid;
  place-items: center;
  width: 1.5rem;
  height: 1.5rem;
  border-radius: 50%;
  background: var(--grad-sunrise);
  color: var(--bg-panel);
  font: 800 0.85rem/1 var(--font-body);
}
.callout-warn {
  border-left-color: var(--warn);
  background: color-mix(in srgb, var(--warn) 8%, var(--bg-panel));
}
.callout-warn::before {
  content: "!";
  background: var(--warn);
}
.callout-ok {
  border-left-color: var(--success);
  background: color-mix(in srgb, var(--success) 8%, var(--bg-panel));
}
.callout-ok::before {
  content: "✓";
  background: var(--success);
}

/* =====================================================
   文末推广块(全站唯一):母题加框,日出渐变描边
   ===================================================== */
.promo-block {
  margin-top: clamp(1.8rem, 4vw, 2.6rem);
  margin-bottom: clamp(1.8rem, 4vw, 2.6rem);
  padding: clamp(1.6rem, 4vw, 2.4rem) var(--blog-inset);
  border: 2px solid transparent;
  border-radius: var(--radius-l);
  background:
    linear-gradient(var(--bg-panel), var(--bg-panel)) padding-box,
    linear-gradient(135deg, var(--accent-2), var(--accent)) border-box;
  box-shadow: var(--shadow-card);
}
.promo-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
  font: 800 1.05rem/1.3 var(--font-display);
  color: var(--accent-dark);
}
.promo-brand::before {
  content: "";
  width: 0.6rem;
  height: 0.6rem;
  border-radius: 50%;
  background: var(--grad-sunrise);
}
.promo-text {
  margin: 0 0 1.1rem;
  color: var(--text-muted);
  line-height: 1.75;
}
.promo-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

/* =====================================================
   延伸阅读 + 上一篇/下一篇(相邻垫距之和 ≤5rem)
   ===================================================== */
#related-posts {
  margin-top: clamp(1.4rem, 3.5vw, 2rem);
}
.blog-sec-title {
  margin: 0 0 1rem;
  padding-left: 0.7rem;
  border-left: 4px solid var(--accent);
  font: 800 1.25rem/1.4 var(--font-display);
  letter-spacing: -0.01em;
  text-wrap: pretty;
}
.rel-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(16rem, 1fr));
  gap: 1rem;
}
.rel-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  padding: 1.05rem 1.15rem 1rem;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-m);
  text-decoration: none;
  overflow: hidden;
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}
.rel-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--grad-sunrise);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.22s ease;
}
.rel-card:hover {
  transform: translateY(-3px);
  border-color: var(--accent-line);
  box-shadow: var(--shadow-pop);
}
.rel-card:hover::before {
  transform: scaleX(1);
}
.rel-tag {
  align-self: flex-start;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-dark);
  font-size: 0.76rem;
  font-weight: 700;
}
.rel-title {
  font-size: 0.98rem;
  font-weight: 600;
  color: var(--text);
  line-height: 1.55;
}
.rel-date {
  font: 500 0.78rem/1 var(--font-mono);
  color: var(--text-muted);
}

#post-nav {
  margin-top: clamp(1.4rem, 3.5vw, 2rem);
  padding-bottom: clamp(2.4rem, 6vw, 3.5rem);
}
.post-nav-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}
.post-nav-grid .pn-card:only-child {
  grid-column: 1 / -1;
}
.pn-card {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  padding: 1rem 1.15rem;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-m);
  text-decoration: none;
  transition: border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}
.pn-card:hover {
  border-color: var(--accent-line);
  transform: translateY(-2px);
  box-shadow: var(--shadow-pop);
}
.pn-label {
  font: 700 0.76rem/1 var(--font-mono);
  letter-spacing: 0.08em;
  color: var(--accent-dark);
}
.pn-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
  line-height: 1.55;
}
.pn-next {
  align-items: flex-end;
  text-align: right;
}
@media (max-width: 640px) {
  .post-nav-grid {
    grid-template-columns: 1fr;
  }
  .pn-next {
    align-items: flex-start;
    text-align: left;
  }
}

/* =====================================================
   悬浮 CTA(文章页搜索落地页用;列表页不放)
   ===================================================== */
.float-cta {
  position: fixed;
  right: 1.4rem;
  bottom: 1.4rem;
  z-index: 60;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.78rem 1.3rem;
  border-radius: 999px;
  background: var(--grad-sunrise);
  color: var(--bg-panel);
  font: 700 0.95rem/1 var(--font-body);
  text-decoration: none;
  box-shadow: var(--shadow-cta);
  transition: transform 0.2s ease;
}
.float-cta svg {
  display: block;
}
.float-cta:hover {
  transform: translateY(-2px);
}
@media (max-width: 640px) {
  .float-cta {
    right: 0.9rem;
    bottom: 0.9rem;
    padding: 0.68rem 1rem;
    font-size: 0.9rem;
  }
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  .post-card,
  .rel-card,
  .pn-card,
  .filter-btn,
  .float-cta {
    transition: none;
  }
  .post-card:hover,
  .rel-card:hover,
  .pn-card:hover,
  .float-cta:hover {
    transform: none;
  }
  .rel-card::before {
    transition: none;
  }
}