/* VPNAW · 博客列表与文章页专属样式(全部由设计令牌派生) */

.reading-wrap {
  --reading-col: 54rem;
  width: 100%;
  max-width: calc(var(--reading-col) + 2 * var(--gutter));
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* 文章页:阅读列收窄到 .prose 的 760px 阅读宽度,面包屑/hero/正文同一条列 */
.article-hero .reading-wrap,
.reading-wrap.article-body,
main > .reading-wrap {
  --reading-col: 47.5rem;
}

/* ---------- 列表页 Hero:错位色块 ---------- */

.blog-hero {
  position: relative;
  overflow-x: clip;
  padding-top: calc(var(--sec-y) + 1.5rem);
  padding-bottom: calc(var(--sec-y) * .7 + 2.5rem);
  background-image: linear-gradient(180deg, var(--bg-hero-top), var(--bg-hero-bot));
}

.blog-hero-block {
  position: absolute;
  z-index: 0;
  top: 2.6rem;
  left: max(1rem, calc(50% - 30rem));
  width: 22rem;
  height: 12rem;
  border-radius: var(--r-panel);
  background: linear-gradient(120deg, color-mix(in srgb, var(--accent) 16%, transparent), color-mix(in srgb, var(--accent-2) 8%, transparent));
  box-shadow: 0 24px 60px rgba(var(--accent-rgb), .10);
  transform: rotate(-4deg);
  pointer-events: none;
}

.blog-hero-year {
  position: absolute;
  z-index: 0;
  right: max(.5rem, calc(50% - 32rem));
  bottom: -.6rem;
  font-family: var(--font-mono);
  font-size: clamp(3.4rem, 9vw, 5.5rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.04em;
  color: color-mix(in srgb, var(--text) 7%, transparent);
  pointer-events: none;
}

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

.blog-hero h1 {
  margin: .5rem 0 0;
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 4.4vw, 3rem);
  font-weight: 800;
  line-height: 1.16;
  letter-spacing: -.02em;
  color: var(--text);
  text-wrap: pretty;
}

.blog-hero .lede {
  max-width: 40rem;
  margin-top: 1rem;
  color: var(--muted);
  font-size: 1.02rem;
  line-height: 1.85;
}

.blog-hero .trust {
  margin-top: 1.4rem;
}

/* ---------- 面包屑 ---------- */

.crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .5rem;
  margin-top: 1.5rem;
  margin-bottom: 1.1rem;
  font-size: .86rem;
  color: var(--muted);
}

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

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

.crumbs .sep {
  color: var(--border);
}

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

/* ---------- 筛选条 ---------- */

.blog-list-sec {
  padding-top: calc(var(--sec-y) * .6);
  padding-bottom: var(--sec-y);
}

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border);
}

.filter-btn {
  appearance: none;
  border: 1px solid var(--border);
  border-radius: var(--r-pill);
  background: var(--panel);
  color: var(--text-muted, var(--muted));
  font-family: var(--font-body);
  font-size: .86rem;
  line-height: 1;
  padding: .55rem .95rem;
  cursor: pointer;
  transition: color .18s ease, border-color .18s ease, background-color .18s ease, transform .18s ease;
}

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

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

.filter-btn.is-active {
  background: var(--accent);
  border-color: var(--accent-dark);
  color: var(--text);
  font-weight: 600;
}

.list-count {
  margin: 1rem 0 1.6rem;
  font-family: var(--font-mono);
  font-size: .8rem;
  letter-spacing: .04em;
  color: var(--muted);
}

.list-empty {
  padding: 2.5rem 0;
  color: var(--muted);
  text-align: center;
}

/* ---------- 文章卡 ---------- */

.article-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 20rem), 1fr));
  gap: 1.4rem;
}

.post-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: .6rem;
  padding: 1.5rem 1.5rem 1.3rem;
  border: 1px solid var(--border);
  border-radius: var(--r-card);
  background: var(--panel);
  box-shadow: 0 1px 0 var(--white) inset, 0 18px 40px rgba(var(--accent-rgb), .06);
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}

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

.post-card:hover {
  transform: translateY(-3px);
  border-color: var(--accent);
  box-shadow: 0 1px 0 var(--white) inset, 0 24px 48px rgba(var(--accent-rgb), .12);
}

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

.post-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .55rem;
  font-size: .8rem;
  color: var(--muted);
}

.post-date {
  font-family: var(--font-mono);
  letter-spacing: .02em;
}

.post-card h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.12rem;
  font-weight: 700;
  line-height: 1.45;
  letter-spacing: -.01em;
  text-wrap: pretty;
}

.post-card h3 a {
  color: var(--text);
  text-decoration: none;
}

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

.post-card p {
  margin: 0;
  color: var(--muted);
  font-size: .92rem;
  line-height: 1.8;
}

.post-more {
  margin-top: auto;
  padding-top: .4rem;
  color: var(--accent);
  font-size: .88rem;
  font-weight: 600;
  text-decoration: none;
}

.post-more:hover {
  text-decoration: underline;
}

/* ---------- 文章页 Hero:offset-block ---------- */

.article-hero {
  position: relative;
  overflow-x: clip;
  padding-top: calc(var(--sec-y) * .5);
  padding-bottom: calc(var(--sec-y) * .45);
  background-image: linear-gradient(180deg, var(--bg-hero-top), var(--bg-hero-bot));
}

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

.article-hero-block {
  position: absolute;
  z-index: 0;
  top: 3.2rem;
  left: max(.75rem, calc(50% - 31rem));
  width: min(26rem, 62vw);
  height: 11.5rem;
  border-radius: var(--r-panel);
  background: linear-gradient(115deg, color-mix(in srgb, var(--accent) 18%, transparent), color-mix(in srgb, var(--accent-2) 7%, transparent));
  box-shadow: 0 26px 64px rgba(var(--accent-rgb), .12);
  transform: rotate(-3.5deg);
  pointer-events: none;
}

.article-hero-mark {
  position: absolute;
  z-index: 0;
  right: max(.5rem, calc(50% - 33rem));
  top: 1.2rem;
  font-family: var(--font-mono);
  font-size: clamp(3.4rem, 9vw, 6.4rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.05em;
  color: color-mix(in srgb, var(--accent) 11%, transparent);
  pointer-events: none;
}

.article-hero h1 {
  margin: .55rem 0 0;
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3.4vw, 2.6rem);
  font-weight: 800;
  line-height: 1.24;
  letter-spacing: -.02em;
  color: var(--text);
  text-wrap: pretty;
}

.article-hero .lede {
  max-width: 46rem;
  margin-top: .95rem;
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.85;
}

.article-hero .post-meta {
  margin-top: 1.1rem;
  padding-left: .2rem;
}

.article-hero .post-meta .badge {
  background: var(--accent);
  border-color: var(--accent-dark);
  color: var(--text);
  font-weight: 600;
}

/* ---------- 正文列 ---------- */

.reading-wrap.article-body {
  max-width: calc(var(--reading-col) + 2 * var(--gutter));
  width: 100%;
  margin-inline: auto;
  padding-inline: var(--gutter);
  padding-top: calc(var(--sec-y) * .45);
  padding-bottom: calc(var(--sec-y) * .3);
}

.prose {
  color: var(--text);
  font-size: 1rem;
  line-height: 1.9;
  margin-inline: auto;
}

/* 文章内推广按钮（footer.js 用它做转化埋点标记，这里补上排版定义） */
.promo-cta {
  flex: 0 0 auto;
  white-space: nowrap;
}

.prose > * + * {
  margin-top: 1.15rem;
}

.prose h2 {
  position: relative;
  margin-top: 2.9rem;
  padding-left: 1.05rem;
  font-family: var(--font-display);
  font-size: clamp(1.28rem, 2.2vw, 1.6rem);
  font-weight: 800;
  line-height: 1.4;
  letter-spacing: -.015em;
  color: var(--text);
  text-wrap: pretty;
  counter-increment: prose-sec;
}

.prose h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: .38em;
  width: 4px;
  height: 1em;
  border-radius: var(--r-pill);
  background: linear-gradient(180deg, var(--accent), var(--accent-2));
}

.prose h2::after {
  content: counter(prose-sec, decimal-leading-zero);
  margin-left: .55rem;
  font-family: var(--font-mono);
  font-size: .68em;
  font-weight: 500;
  color: color-mix(in srgb, var(--accent) 62%, var(--muted));
  vertical-align: .12em;
}

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

.prose h3 {
  margin-top: 2rem;
  font-family: var(--font-display);
  font-size: clamp(1.08rem, 1.7vw, 1.3rem);
  font-weight: 700;
  line-height: 1.5;
  letter-spacing: -.01em;
  color: var(--text);
  text-wrap: pretty;
}

.prose h3::before {
  content: "";
  display: inline-block;
  width: .45rem;
  height: .45rem;
  margin-right: .5rem;
  border-radius: 50%;
  background: var(--accent);
  vertical-align: .16em;
}

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

.prose a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: .18em;
}

.prose ul,
.prose ol {
  padding-left: 1.25rem;
}

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

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

.prose blockquote {
  margin: 1.6rem 0;
  padding: 1rem 1.2rem 1rem 1.3rem;
  border-left: 3px solid var(--accent);
  border-radius: 0 var(--r-tile) var(--r-tile) 0;
  background: var(--panel-2);
  color: var(--text);
}

.prose blockquote p {
  margin: 0;
}

.prose code {
  font-family: var(--font-mono);
  font-size: .88em;
  padding: .12em .38em;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--panel);
  color: var(--accent-dark);
}

.prose pre {
  position: relative;
  margin: 1.6rem 0;
  padding: 2.2rem 1.2rem 1.2rem;
  border: 1px solid var(--text);
  border-radius: var(--r-card);
  background: var(--text);
  color: var(--bg-hero-top);
  overflow-x: auto;
}

.prose pre::before {
  content: "";
  position: absolute;
  top: .85rem;
  left: 1.1rem;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--error);
  box-shadow: 16px 0 0 var(--warn), 32px 0 0 var(--success);
}

.prose pre code {
  display: block;
  padding: 0;
  border: 0;
  background: none;
  color: inherit;
  font-size: .86rem;
  line-height: 1.75;
  overflow-wrap: anywhere;
}

.prose hr {
  margin: 2.4rem 0;
  border: 0;
  border-top: 1px solid var(--border);
}

.prose .data-table {
  margin: 1.6rem 0;
}

/* ---------- stat-grid ---------- */

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 11rem), 1fr));
  gap: .9rem;
  margin: 1.7rem 0;
}

.stat-card {
  position: relative;
  padding: 1.15rem 1.15rem 1.05rem;
  border: 1px solid var(--border);
  border-radius: var(--r-card);
  background: var(--panel);
  box-shadow: 0 1px 0 var(--white) inset;
}

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

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

.stat-card:nth-child(3n)::before {
  background: color-mix(in srgb, var(--accent) 55%, var(--text));
}

.stat-card:nth-child(2n) {
  background: color-mix(in srgb, var(--accent-2) 7%, var(--panel));
}

.stat-card:nth-child(3n) {
  background: color-mix(in srgb, var(--accent) 5%, var(--panel));
}

.stat-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -.02em;
  color: var(--accent-dark);
  font-variant-numeric: tabular-nums;
}

.stat-label {
  display: block;
  margin-top: .35rem;
  font-size: .86rem;
  line-height: 1.6;
  color: var(--muted);
}

/* ---------- check-list(仅容器装饰,不注入勾叉语义) ---------- */

.check-list {
  list-style: none;
  margin: 1.6rem 0;
  padding: 0;
  display: grid;
  gap: .6rem;
}

.check-list li {
  padding: .8rem .95rem;
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: 0 var(--r-tile) var(--r-tile) 0;
  background: var(--panel);
  font-size: .95rem;
  line-height: 1.8;
}

.check-list li:nth-child(2n) {
  background: var(--panel-2);
}

/* ---------- verdict ---------- */

.verdict {
  margin: 1.7rem 0;
  padding: 1.05rem 1.2rem;
  border-left: 4px solid var(--accent);
  border-radius: 0 var(--r-tile) var(--r-tile) 0;
  background: color-mix(in srgb, var(--accent) 6%, var(--panel));
  font-size: .98rem;
  line-height: 1.85;
}

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

/* ---------- callout ---------- */

.callout {
  margin: 1.7rem 0;
}

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

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

/* ---------- 正文表格 ---------- */

.prose table {
  margin: 1.7rem 0;
}

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

/* ---------- 文末推广卡 ---------- */

.promo-block {
  margin-top: calc(var(--sec-y) * .55);
  margin-bottom: calc(var(--sec-y) * .45);
}

/* ---------- 延伸阅读 / 上下篇 ---------- */

#related-posts {
  padding-top: calc(var(--sec-y) * .35);
}

#post-nav {
  padding-top: 1.6rem;
  padding-bottom: calc(var(--sec-y) * .45);
}

.related-title {
  position: relative;
  margin: 0 0 1.2rem;
  padding-left: .95rem;
  font-family: var(--font-display);
  font-size: clamp(1.1rem, 1.9vw, 1.35rem);
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--text);
}

.related-title::before {
  content: "";
  position: absolute;
  left: 0;
  top: .3em;
  width: 4px;
  height: 1em;
  border-radius: var(--r-pill);
  background: linear-gradient(180deg, var(--accent), var(--accent-2));
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 16rem), 1fr));
  gap: 1.1rem;
}

.related-card {
  position: relative;
  padding: 1.2rem 1.2rem 1.15rem;
  border: 1px solid var(--border);
  border-radius: var(--r-card);
  background: var(--panel);
  transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease;
}

.related-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 2px;
  border-radius: var(--r-card) var(--r-card) 0 0;
  background: var(--accent);
  opacity: 0;
  transition: opacity .2s ease;
}

.related-card:hover {
  transform: translateY(-3px);
  border-color: var(--accent);
  box-shadow: 0 18px 36px rgba(var(--accent-rgb), .10);
}

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

.related-card h3 {
  margin: .1rem 0 .5rem;
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.5;
  text-wrap: pretty;
}

.related-card h3 a {
  color: var(--text);
  text-decoration: none;
}

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

.related-card p {
  margin: 0;
  color: var(--muted);
  font-size: .88rem;
  line-height: 1.75;
}

.post-nav-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 16rem), 1fr));
  gap: 1.1rem;
}

.post-nav-card {
  display: flex;
  flex-direction: column;
  gap: .4rem;
  padding: 1.15rem 1.2rem;
  border: 1px solid var(--border);
  border-radius: var(--r-card);
  background: var(--panel);
  text-decoration: none;
  transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease;
}

.post-nav-card:hover {
  transform: translateY(-3px);
  border-color: var(--accent);
  box-shadow: 0 18px 36px rgba(var(--accent-rgb), .10);
}

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

.pn-dir {
  font-family: var(--font-mono);
  font-size: .76rem;
  letter-spacing: .06em;
  color: var(--accent-dark);
}

.pn-title {
  color: var(--text);
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.5;
  text-wrap: pretty;
}

.pn-date {
  font-family: var(--font-mono);
  font-size: .76rem;
  color: var(--muted);
}

/* ---------- 窄屏 ---------- */

@media (max-width: 900px) {
  .blog-hero-block,
  .article-hero-block {
    width: min(18rem, 66vw);
    height: 9rem;
    top: 2rem;
  }

  .blog-hero-year,
  .article-hero-mark {
    right: .5rem;
  }
}

@media (max-width: 640px) {
  .blog-hero-block,
  .article-hero-block {
    left: .5rem;
    width: 14rem;
    height: 7rem;
    opacity: .8;
  }

  .blog-hero-year {
    font-size: 3.6rem;
    bottom: 0;
  }

  .article-hero-mark {
    font-size: 3rem;
    top: .6rem;
  }

  .prose h2 {
    padding-left: .85rem;
  }

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

@media (prefers-reduced-motion: reduce) {
  .post-card,
  .related-card,
  .post-nav-card,
  .filter-btn {
    transition: none;
  }

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