/* =========================================================
   VPNCQ · 博客样式包(列表页 + 文章页)
   全部颜色 / 圆角 / 阴影取自 :root 设计令牌
   ========================================================= */

:root {
  --read-w: 56rem;
  --read-pad: var(--gutter);
  --list-w: 72rem;
}

/* ---------- 通用列容器 ---------- */
.blog-hero-inner,
.blog-index {
  width: 100%;
  max-width: calc(var(--list-w) + 2 * var(--read-pad));
  margin-inline: auto;
  padding-inline: var(--read-pad);
}

.crumbs,
.article-hero,
.reading-wrap {
  width: 100%;
  max-width: calc(var(--read-w) + 2 * var(--read-pad));
  margin-inline: auto;
  padding-inline: var(--read-pad);
}

/* ---------- 列表页 hero ---------- */
.blog-hero {
  position: relative;
  padding-block: clamp(2.2rem, 5vw, 3.4rem) clamp(1.4rem, 3vw, 2rem);
}

.blog-hero::after {
  content: "";
  display: block;
  height: 2px;
  margin-top: clamp(1.2rem, 2.5vw, 1.8rem);
  background: linear-gradient(90deg,
    color-mix(in srgb, var(--accent) 55%, transparent) 0,
    color-mix(in srgb, var(--mint) 70%, transparent) 46%,
    transparent 100%);
  border-radius: var(--r-pill);
}

.blog-hero-title {
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 4vw, 3rem);
  line-height: 1.14;
  letter-spacing: -0.02em;
  font-weight: 900;
  color: var(--text);
  margin: 0.5rem 0 0;
  text-wrap: pretty;
}

.blog-hero-lead {
  max-width: 44rem;
  margin: 0.9rem 0 0;
  color: var(--text-muted);
  font-size: clamp(0.96rem, 1.15vw, 1.04rem);
  line-height: 1.85;
}

/* ---------- 列表页筛选 ---------- */
.blog-index {
  padding-bottom: clamp(2.4rem, 5vw, 4rem);
}

.filter-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding-top: 0.4rem;
}

.filter-btn {
  font-family: var(--font-body);
  font-size: 0.9rem;
  line-height: 1;
  min-height: 40px;
  padding: 0.62rem 1.05rem;
  border-radius: var(--r-pill);
  border: 1px solid var(--border);
  background: var(--bg-panel);
  color: var(--text-muted);
  cursor: pointer;
  transition: background 0.18s ease, color 0.18s ease, border-color 0.18s ease, transform 0.18s ease;
}

.filter-btn:hover {
  color: var(--accent-dark);
  border-color: color-mix(in srgb, var(--accent) 34%, var(--border));
  transform: translateY(-1px);
}

.filter-btn.is-active {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--paper-white);
}

.list-count {
  margin: 1rem 0 0.9rem;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.02em;
  color: var(--text-muted);
}

.list-empty {
  margin: 1.4rem 0 0;
  padding: 1rem 1.1rem;
  border-radius: var(--r-sm);
  border: 1px dashed var(--border);
  color: var(--text-muted);
  background: color-mix(in srgb, var(--bg-panel-2) 55%, var(--bg-panel));
}

/* ---------- 文章卡片 ---------- */
.post-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(17rem, 1fr));
  gap: 1rem;
}

.post-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  padding: clamp(1.1rem, 2vw, 1.5rem);
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  box-shadow: var(--shadow-soft);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.post-card::after {
  content: "";
  position: absolute;
  left: clamp(1.1rem, 2vw, 1.5rem);
  right: clamp(1.1rem, 2vw, 1.5rem);
  top: 0;
  height: 2px;
  border-radius: var(--r-pill);
  background: var(--grad-mint);
  opacity: 0;
  transform: scaleX(0.4);
  transform-origin: left center;
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.post-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lift);
  border-color: color-mix(in srgb, var(--accent) 26%, var(--border));
}

.post-card:hover::after {
  opacity: 1;
  transform: scaleX(1);
}

.post-card-top {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.55rem;
}

.post-tag,
.related-tag {
  background: color-mix(in srgb, var(--accent) 12%, var(--bg-panel));
  color: var(--accent-dark);
  border: 1px solid color-mix(in srgb, var(--accent) 26%, var(--border));
  font-weight: 600;
}

.post-date,
.related-card-date,
.post-nav-date {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.02em;
  color: var(--text-muted);
}

.post-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.05rem, 1.5vw, 1.24rem);
  line-height: 1.42;
  letter-spacing: -0.01em;
  font-weight: 700;
}

.post-title a {
  color: var(--text);
  text-decoration: none;
  transition: color 0.18s ease;
}

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

.post-summary {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.94rem;
  line-height: 1.8;
}

.post-more {
  margin-top: auto;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding-top: 0.35rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--accent);
  text-decoration: none;
}

.post-more svg {
  transition: transform 0.18s ease;
}

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

.post-more:hover svg {
  transform: translateX(3px);
}

/* ---------- 面包屑(文章页) ---------- */
.crumbs {
  margin-top: 1.6rem;
  padding-top: 0.4rem;
  padding-bottom: 0.2rem;
}

.crumbs-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.crumbs-list li {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.crumbs-list li + li::before {
  content: "/";
  color: color-mix(in srgb, var(--text-muted) 55%, transparent);
}

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

.crumbs-list a:hover {
  color: var(--accent);
  text-decoration: underline;
}

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

/* ---------- 文章 hero:offset-block 错位色块 ---------- */
.article-hero {
  position: relative;
  z-index: 0;
  margin-top: 0.6rem;
  margin-bottom: clamp(1rem, 2vw, 1.5rem);
  padding-block: clamp(1.5rem, 3vw, 2.3rem) clamp(1.4rem, 2.6vw, 2rem);
}

.article-hero::before {
  content: "";
  position: absolute;
  z-index: -1;
  right: calc(var(--read-pad) - 0.4rem);
  top: 1.05rem;
  width: min(56%, 24rem);
  height: 52%;
  border-radius: var(--r-lg);
  background: linear-gradient(135deg,
    color-mix(in srgb, var(--mint) 62%, var(--bg-panel)) 0%,
    color-mix(in srgb, var(--mint) 20%, var(--bg-panel)) 100%);
  box-shadow: var(--shadow-soft);
  transform: rotate(-1.4deg);
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin: 0 0 0.9rem;
  padding-left: clamp(0rem, 1.4vw, 1rem);
}

.meta-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.3rem 0.7rem;
  border-radius: var(--r-pill);
  border: 1px solid var(--border);
  background: var(--bg-panel);
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  line-height: 1.5;
}

.meta-pill.is-tag {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--paper-white);
  font-family: var(--font-body);
  font-weight: 600;
}

.article-title {
  margin: 0 0 0.75rem;
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3.6vw, 2.6rem);
  line-height: 1.22;
  letter-spacing: -0.015em;
  font-weight: 900;
  color: var(--text);
  text-wrap: pretty;
}

.article-lead {
  margin: 0;
  padding-left: clamp(0rem, 1.4vw, 1rem);
  max-width: 46rem;
  color: var(--text-muted);
  font-size: clamp(0.97rem, 1.15vw, 1.05rem);
  line-height: 1.85;
}

/* ---------- 正文列 ---------- */
.reading-wrap {
  counter-reset: sec;
  padding-block: 0 clamp(1.5rem, 3vw, 2rem);
}

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

.article-body p {
  margin: 0 0 1.05em;
}

.article-body a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

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

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

.reading-wrap h2 {
  counter-increment: sec;
  margin: 2rem 0 0.75rem;
  padding-bottom: 0.45rem;
  border-bottom: 1px solid var(--border);
  font-family: var(--font-display);
  font-size: clamp(1.22rem, 1.9vw, 1.6rem);
  line-height: 1.38;
  letter-spacing: -0.01em;
  font-weight: 800;
  color: var(--text);
  text-wrap: pretty;
}

.reading-wrap h2::before {
  content: counter(sec, decimal-leading-zero);
  display: inline-block;
  margin-right: 0.55rem;
  font-family: var(--font-mono);
  font-size: 0.66em;
  font-weight: 700;
  color: var(--accent);
  vertical-align: 0.14em;
}

.reading-wrap h3 {
  margin: 1.5rem 0 0.55rem;
  font-family: var(--font-display);
  font-size: clamp(1.06rem, 1.4vw, 1.3rem);
  line-height: 1.45;
  letter-spacing: -0.008em;
  font-weight: 700;
  color: var(--text);
  text-wrap: pretty;
}

.article-body > h2:first-child,
.article-body > h3:first-child {
  margin-top: 0.3rem;
}

.reading-wrap ul,
.reading-wrap ol {
  margin: 0 0 1.1em;
  padding-left: 1.25rem;
}

.reading-wrap li {
  margin-bottom: 0.4em;
}

.reading-wrap blockquote {
  margin: 1.4rem 0;
  padding: 0.85rem 1.1rem;
  border-left: 4px solid var(--accent);
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
  background: color-mix(in srgb, var(--bg-panel-2) 60%, var(--bg-panel));
  color: var(--text-muted);
}

.reading-wrap blockquote p:last-child {
  margin-bottom: 0;
}

/* 行内代码 */
.reading-wrap :not(pre) > code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  padding: 0.14em 0.4em;
  border-radius: var(--r-xs);
  background: var(--bg-panel-2);
  border: 1px solid var(--border);
  color: var(--accent-dark);
  overflow-wrap: anywhere;
}

/* 终端窗代码块 */
.reading-wrap pre {
  position: relative;
  margin: 1.4rem 0;
  padding: 2.4rem 1.1rem 1.1rem;
  border-radius: var(--r-md);
  background: var(--espresso);
  color: color-mix(in srgb, var(--mint) 72%, var(--paper-white));
  border: 1px solid color-mix(in srgb, var(--paper-white) 10%, transparent);
  box-shadow: var(--shadow-card);
  overflow-x: auto;
}

.reading-wrap pre::before {
  content: "";
  position: absolute;
  left: 1.05rem;
  top: 0.95rem;
  width: 0.55rem;
  height: 0.55rem;
  border-radius: var(--r-pill);
  background: var(--error);
  box-shadow: 1rem 0 0 var(--warn), 2rem 0 0 var(--success);
}

.reading-wrap pre code {
  display: block;
  background: none;
  border: 0;
  padding: 0;
  color: inherit;
  font-family: var(--font-mono);
  font-size: 0.86rem;
  line-height: 1.72;
  overflow-wrap: normal;
}

/* 表格 */
.reading-wrap table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.4rem 0;
  font-size: 0.94rem;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  overflow: hidden;
}

.reading-wrap thead th {
  background: var(--accent-dark);
  color: var(--paper-white);
  text-align: left;
  font-weight: 600;
  padding: 0.7rem 0.85rem;
  white-space: nowrap;
}

.reading-wrap tbody td {
  padding: 0.68rem 0.85rem;
  border-top: 1px solid var(--border);
  vertical-align: top;
}

.reading-wrap tbody tr:nth-child(even) {
  background: color-mix(in srgb, var(--bg-panel-2) 55%, var(--bg-panel));
}

.reading-wrap tbody tr:hover {
  background: color-mix(in srgb, var(--mint) 14%, var(--bg-panel));
}

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

/* ---------- 数据卡网格 ---------- */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(9.5rem, 1fr));
  gap: 0.85rem;
  margin: 1.4rem 0;
}

.stat-card {
  padding: 1rem 1.05rem;
  border-radius: var(--r-sm);
  border: 1px solid var(--border);
  border-top: 3px solid var(--accent);
  background: var(--bg-panel);
  box-shadow: var(--shadow-soft);
}

.stat-card:nth-child(even) {
  border-top-color: var(--mint);
  background: color-mix(in srgb, var(--mint) 10%, var(--bg-panel));
}

.stat-num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.3rem, 2.4vw, 1.68rem);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--accent-dark);
}

.stat-label {
  display: block;
  margin-top: 0.28rem;
  font-size: 0.85rem;
  line-height: 1.55;
  color: var(--text-muted);
}

/* ---------- 勾叉清单(不注入任何语义标记) ---------- */
.check-list {
  list-style: none;
  margin: 1.2rem 0;
  padding: 0;
  display: grid;
  gap: 0.5rem;
}

.check-list li {
  margin: 0;
  padding: 0.7rem 0.9rem;
  border-radius: var(--r-xs);
  border: 1px solid var(--border);
  border-left: 3px solid color-mix(in srgb, var(--accent) 55%, var(--border));
  background: var(--bg-panel);
  font-size: 0.96rem;
  line-height: 1.75;
}

/* ---------- 结论块 ---------- */
.verdict {
  margin: 1.5rem 0;
  padding: 1rem 1.1rem;
  border-left: 4px solid var(--accent);
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
  background: color-mix(in srgb, var(--mint) 12%, var(--bg-panel));
  font-size: 0.98rem;
  line-height: 1.8;
}

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

/* ---------- 提示块 ---------- */
.callout {
  position: relative;
  margin: 1.4rem 0;
  padding: 1rem 1.1rem 1rem 3rem;
  border-radius: var(--r-sm);
  border: 1px solid var(--border);
  border-left: 4px solid var(--warn);
  background: color-mix(in srgb, var(--warn) 9%, var(--bg-panel));
}

.callout::before {
  content: "!";
  position: absolute;
  left: 0.9rem;
  top: 1rem;
  width: 1.4rem;
  height: 1.4rem;
  border-radius: var(--r-pill);
  background: var(--warn);
  color: var(--paper-white);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 700;
  line-height: 1.4rem;
  text-align: center;
}

.callout-title {
  margin: 0 0 0.3rem;
  font-weight: 700;
  color: var(--text);
}

.callout p:last-child {
  margin-bottom: 0;
}

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

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

/* ---------- 文末推广卡 ---------- */
.post-promo {
  position: relative;
  margin: clamp(2rem, 4vw, 2.75rem) 0 0;
  padding: clamp(1.4rem, 3vw, 2rem);
  border-radius: var(--r-lg);
  color: var(--paper-white);
  background-image:
    radial-gradient(circle at 88% 10%, color-mix(in srgb, var(--mint) 34%, transparent) 0, transparent 48%),
    linear-gradient(135deg, var(--accent-dark) 0%, var(--espresso) 80%);
  box-shadow: var(--shadow-card);
}

.post-promo-brand {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: color-mix(in srgb, var(--mint) 82%, var(--paper-white));
}

.post-promo-desc {
  margin: 0.55rem 0 1.1rem;
  max-width: 34rem;
  font-size: 0.98rem;
  line-height: 1.8;
  color: color-mix(in srgb, var(--paper-white) 92%, transparent);
}

.post-promo-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.post-promo .btn-promo {
  background: var(--paper-white);
  color: var(--accent-dark);
  border: 1px solid var(--paper-white);
}

.post-promo .btn-promo:hover {
  background: color-mix(in srgb, var(--paper-white) 88%, var(--mint));
}

.post-promo .btn-promo-ghost {
  background: transparent;
  color: var(--paper-white);
  border: 1px solid color-mix(in srgb, var(--paper-white) 55%, transparent);
}

.post-promo .btn-promo-ghost:hover {
  border-color: var(--paper-white);
}

/* ---------- 区块小标题 ---------- */
.section-h {
  margin: clamp(1.8rem, 3vw, 2.4rem) 0 0.4rem;
  font-family: var(--font-display);
  font-size: clamp(1.1rem, 1.6vw, 1.28rem);
  line-height: 1.4;
  letter-spacing: -0.01em;
  font-weight: 800;
  color: var(--text);
}

/* ---------- 延伸阅读 ---------- */
#related-posts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr));
  gap: 0.85rem;
  margin-top: 0.9rem;
  padding-top: 0;
}

#related-posts:empty {
  display: none;
}

.related-card {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  padding: 1rem 1.05rem;
  border-radius: var(--r-sm);
  border: 1px solid var(--border);
  background: var(--bg-panel);
  text-decoration: none;
  color: var(--text);
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.related-card:hover {
  transform: translateY(-2px);
  border-color: color-mix(in srgb, var(--accent) 40%, var(--border));
  box-shadow: var(--shadow-soft);
}

.related-card .related-tag {
  align-self: flex-start;
  font-size: 0.76rem;
  padding: 0.16rem 0.55rem;
  border-radius: var(--r-pill);
}

.related-card-title {
  font-size: 0.95rem;
  line-height: 1.6;
  font-weight: 600;
}

.related-card:hover .related-card-title {
  color: var(--accent-dark);
}

/* ---------- 上一篇 / 下一篇 ---------- */
#post-nav {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.85rem;
  margin-top: 0.9rem;
  padding-bottom: clamp(1.2rem, 2.4vw, 1.6rem);
}

#post-nav:empty {
  display: none;
}

.post-nav-link {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  padding: 1rem 1.05rem;
  border-radius: var(--r-sm);
  border: 1px solid var(--border);
  background: var(--bg-panel);
  text-decoration: none;
  color: var(--text);
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

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

.post-nav-link:hover {
  transform: translateY(-2px);
  border-color: color-mix(in srgb, var(--accent) 40%, var(--border));
  box-shadow: var(--shadow-soft);
}

.post-nav-dir {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  color: var(--accent);
}

.post-nav-title {
  font-size: 0.95rem;
  line-height: 1.6;
  font-weight: 600;
}

.post-nav-link:hover .post-nav-title {
  color: var(--accent-dark);
}

/* ---------- 悬浮 CTA(文章页使用) ---------- */
.float-cta {
  position: fixed;
  right: clamp(0.85rem, 3vw, 1.75rem);
  bottom: clamp(0.85rem, 3vw, 1.75rem);
  z-index: 60;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  min-height: 48px;
  padding: 0.78rem 1.15rem;
  border-radius: var(--r-pill);
  background: var(--grad-primary);
  color: var(--paper-white);
  font-family: var(--font-body);
  font-size: 0.94rem;
  font-weight: 600;
  text-decoration: none;
  border: 1px solid color-mix(in srgb, var(--paper-white) 22%, transparent);
  box-shadow: var(--shadow-lift);
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.float-cta:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-card);
}

.float-cta svg {
  flex: 0 0 auto;
}

@media (max-width: 640px) {
  .float-cta {
    right: 0.7rem;
    bottom: 0.7rem;
    padding: 0.66rem 0.95rem;
    font-size: 0.88rem;
  }
}

/* ---------- 响应式 ---------- */
@media (max-width: 640px) {
  .post-grid {
    grid-template-columns: 1fr;
  }

  .article-hero::before {
    width: 62%;
    height: 44%;
    top: 0.7rem;
  }

  .article-meta,
  .article-lead {
    padding-left: 0;
  }

  #post-nav {
    grid-template-columns: 1fr;
  }

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

@media (prefers-reduced-motion: reduce) {
  .post-card,
  .post-card::after,
  .post-more svg,
  .filter-btn,
  .related-card,
  .post-nav-link,
  .float-cta {
    transition: none;
  }

  .post-card:hover,
  .related-card:hover,
  .post-nav-link:hover,
  .float-cta:hover,
  .filter-btn:hover {
    transform: none;
  }
}