/* VPNBF 博客样式包:列表页 + 文章页,全部取值自设计令牌 */

/* ---------- 列表页 ---------- */

.blog-page {
  padding-top: calc(var(--header-h) + 1.6rem);
  padding-bottom: var(--sec-y);
}

.blog-hero {
  position: relative;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--r-xl);
  padding: 2.6rem 2rem 2.4rem;
  padding-inline: 1.8rem;
  box-shadow: var(--shadow-card);
  overflow: hidden;
  margin-bottom: 2.6rem;
}

.blog-hero::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 4px;
  background: linear-gradient(90deg, var(--peach), var(--lilac), var(--sky), var(--cream));
}

.hero-eyebrow {
  margin: 0 0 0.9rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.blog-hero h1 {
  margin: 0 0 0.9rem;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(1.85rem, 4.4vw, 3rem);
  line-height: 1.24;
  letter-spacing: -0.01em;
  color: var(--text);
  text-wrap: pretty;
}

.hero-sub {
  margin: 0;
  max-width: 46rem;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--text-muted);
}

.stamp {
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
  width: 6.4rem;
  height: 6.4rem;
  border-radius: 50%;
  border: 1px solid var(--accent);
  transform: rotate(-11deg);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.1rem;
  color: var(--accent);
  background: color-mix(in srgb, var(--bg-panel) 82%, transparent);
  pointer-events: none;
}

.stamp::before {
  content: "";
  position: absolute;
  inset: 5px;
  border-radius: 50%;
  border: 1px solid color-mix(in srgb, var(--accent) 45%, transparent);
}

.stamp b {
  font-family: var(--font-display);
  font-size: 1.5rem;
  line-height: 1;
  letter-spacing: 0.02em;
}

.stamp em {
  font-family: var(--font-mono);
  font-style: normal;
  font-size: 0.56rem;
  letter-spacing: 0.18em;
}

.tag-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-bottom: 2rem;
}

.tag-btn {
  font-family: var(--font-body);
  font-size: 0.88rem;
  color: var(--text-muted);
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--r-pill);
  padding: 0.5rem 1.1rem;
  cursor: pointer;
  transition: color 0.18s ease, border-color 0.18s ease, background-color 0.18s ease;
}

.tag-btn:hover {
  color: var(--text);
  border-color: color-mix(in srgb, var(--accent) 32%, var(--border));
}

.tag-btn.is-active {
  color: var(--bg-panel);
  background: var(--accent);
  border-color: var(--accent);
}

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

.post-card {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 1.6rem 1.5rem 1.4rem;
  box-shadow: var(--shadow-card);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.post-card:hover {
  transform: translateY(-2px);
  border-color: color-mix(in srgb, var(--accent) 22%, var(--border));
  box-shadow: var(--shadow-float);
}

.post-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--text-muted);
}

.chip-tag {
  font-family: var(--font-body);
  font-size: 0.76rem;
  color: var(--accent);
  background: color-mix(in srgb, var(--lilac) 42%, var(--bg-panel));
  border-color: transparent;
}

.post-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 1.24rem;
  line-height: 1.45;
  letter-spacing: -0.005em;
  text-wrap: pretty;
}

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

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

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

.post-more {
  margin-top: auto;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.88rem;
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
  align-self: flex-start;
}

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

.post-empty {
  margin: 1.6rem 0 0;
  font-size: 0.94rem;
  color: var(--text-muted);
}

/* ---------- 文章页骨架 ---------- */

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

.breadcrumb {
  margin-top: 1.5rem;
  padding-top: 0.4rem;
  padding-inline: 1.8rem;
  margin-bottom: 1.1rem;
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.breadcrumb li {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
}

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

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

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

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

.article-hero {
  position: relative;
  background: var(--bg-panel2);
  border-radius: var(--r-xl);
  padding: 2.4rem 1.8rem 2.2rem;
  padding-inline: 1.8rem;
  margin-bottom: 2.4rem;
  overflow: hidden;
}

.article-hero::after {
  content: "";
  position: absolute;
  right: -3rem;
  bottom: -4rem;
  width: 12rem;
  height: 12rem;
  border-radius: 50%;
  background: radial-gradient(circle, color-mix(in srgb, var(--lilac) 55%, transparent), transparent 70%);
  pointer-events: none;
}

.article-hero .stamp {
  top: 1.2rem;
  right: 1.2rem;
  width: 5.6rem;
  height: 5.6rem;
  background: color-mix(in srgb, var(--bg-panel) 74%, transparent);
}

.article-hero .stamp b {
  font-size: 1.3rem;
}

.article-hero .stamp em {
  font-size: 0.5rem;
}

.article-hero .post-meta {
  position: relative;
  z-index: 1;
  justify-content: flex-start;
  margin-bottom: 1rem;
  padding-right: 6.4rem;
}

.meta-outline {
  font-family: var(--font-body);
  font-size: 0.76rem;
  color: var(--text-muted);
  background: transparent;
  border: 1px solid color-mix(in srgb, var(--text-muted) 40%, transparent);
  border-radius: var(--r-pill);
  padding: 0.12rem 0.66rem;
}

.article-hero h1 {
  position: relative;
  z-index: 1;
  margin: 0 0 0.9rem;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(1.6rem, 3.6vw, 2.5rem);
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--text);
  text-wrap: pretty;
  padding-right: 3.4rem;
}

.article-hero .article-summary {
  position: relative;
  z-index: 1;
  margin: 0;
  max-width: 44rem;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--text-muted);
}

/* ---------- 正文 ---------- */

.prose {
  padding-inline: 1.8rem;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.85;
  color: var(--text);
}

.prose > section {
  margin-bottom: 2.2rem;
}

.prose h2 {
  counter-increment: prose-h2;
  position: relative;
  margin: 2.6rem 0 1rem;
  padding-left: 2.5rem;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 1.5rem;
  line-height: 1.4;
  letter-spacing: -0.005em;
  color: var(--text);
  text-wrap: pretty;
}

.prose h2::before {
  content: counter(prose-h2, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 0.18em;
  font-family: var(--font-mono);
  font-size: 0.86rem;
  color: var(--accent);
  background: color-mix(in srgb, var(--peach) 55%, var(--bg-panel));
  border-radius: var(--r-pill);
  padding: 0.1rem 0.5rem;
}

.prose h2:first-child {
  margin-top: 0;
}

.prose h3 {
  margin: 1.9rem 0 0.7rem;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 1.22rem;
  line-height: 1.45;
  color: var(--text);
  text-wrap: pretty;
}

.prose p {
  margin: 0 0 1.1rem;
}

.prose ul,
.prose ol {
  margin: 0 0 1.2rem;
  padding-left: 1.3rem;
}

.prose li {
  margin-bottom: 0.5rem;
  word-break: normal;
  overflow-wrap: anywhere;
}

.prose a {
  color: var(--accent);
  text-decoration: underline;
  text-decoration-color: color-mix(in srgb, var(--accent) 40%, transparent);
  text-underline-offset: 3px;
}

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

.prose strong {
  color: var(--text);
  font-weight: 600;
}

.prose code {
  font-family: var(--font-mono);
  font-size: 0.86em;
  background: var(--bg-panel2);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.08em 0.36em;
}

.prose pre {
  position: relative;
  margin: 0 0 1.4rem;
  padding: 2.4rem 1.2rem 1.2rem;
  background: var(--accent);
  color: var(--bg-panel);
  border-radius: var(--r-lg);
  overflow-x: auto;
  box-shadow: var(--shadow-card);
}

.prose pre::before {
  content: "";
  position: absolute;
  top: 0.85rem;
  left: 1.1rem;
  width: 0.62rem;
  height: 0.62rem;
  border-radius: 50%;
  background: var(--error);
  box-shadow: 1.05rem 0 0 var(--warn), 2.1rem 0 0 var(--success);
}

.prose pre::after {
  content: "terminal";
  position: absolute;
  top: 0.72rem;
  right: 1.1rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  color: color-mix(in srgb, var(--bg-panel) 62%, transparent);
}

.prose pre code {
  background: transparent;
  border: 0;
  padding: 0;
  color: inherit;
  font-size: 0.86rem;
  line-height: 1.7;
}

.prose blockquote {
  margin: 0 0 1.4rem;
  padding: 1rem 1.3rem;
  background: color-mix(in srgb, var(--cream) 34%, var(--bg-panel));
  border-left: 3px solid var(--accent);
  border-radius: 0 var(--r-md) var(--r-md) 0;
  color: var(--text);
}

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

.table-scroll {
  margin: 0 0 1.4rem;
  overflow-x: auto;
  max-width: 100%;
}

.prose table {
  width: 100%;
  min-width: 34rem;
  border-collapse: collapse;
  font-size: 0.92rem;
}

.prose thead th {
  background: var(--accent);
  color: var(--bg-panel);
  font-weight: 500;
  text-align: left;
  padding: 0.7rem 0.9rem;
  white-space: nowrap;
}

.prose tbody td {
  padding: 0.68rem 0.9rem;
  border-bottom: 1px solid var(--border);
  word-break: keep-all;
}

.prose tbody tr:nth-child(even) {
  background: color-mix(in srgb, var(--bg-panel2) 55%, transparent);
}

.prose tbody tr:hover {
  background: color-mix(in srgb, var(--peach) 30%, transparent);
}

/* 三件套:数据卡 / 勾叉清单 / 结论块 */

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(9.5rem, 1fr));
  gap: 0.9rem;
  margin: 0 0 1.5rem;
  padding: 0;
  list-style: none;
}

.stat-card {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: 1rem 1rem 0.9rem;
  border-top: 3px solid var(--peach);
}

.stat-card:nth-child(2n) {
  border-top-color: var(--lilac);
}

.stat-card:nth-child(3n) {
  border-top-color: var(--sky);
}

.stat-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.32rem;
  line-height: 1.2;
  color: var(--accent);
  margin-bottom: 0.28rem;
}

.stat-label {
  display: block;
  font-size: 0.84rem;
  line-height: 1.6;
  color: var(--text-muted);
}

.check-list {
  margin: 0 0 1.5rem;
  padding: 0;
  list-style: none;
}

.check-list li {
  position: relative;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: 0.75rem 1rem;
  margin-bottom: 0.55rem;
  font-size: 0.94rem;
  line-height: 1.75;
}

.check-list li:last-child {
  margin-bottom: 0;
}

.check-list li:hover {
  border-color: color-mix(in srgb, var(--accent) 24%, var(--border));
}

.verdict {
  margin: 0 0 1.5rem;
  padding: 1rem 1.2rem;
  background: color-mix(in srgb, var(--sky) 22%, var(--bg-panel));
  border-left: 3px solid var(--accent);
  border-radius: 0 var(--r-md) var(--r-md) 0;
  font-size: 0.95rem;
  line-height: 1.8;
}

.verdict b {
  display: inline-block;
  margin-right: 0.4rem;
  color: var(--accent);
}

.callout {
  position: relative;
  margin: 0 0 1.4rem;
  padding: 1rem 1.2rem 1rem 3rem;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: 0 var(--r-md) var(--r-md) 0;
  font-size: 0.95rem;
  line-height: 1.8;
}

.callout::before {
  content: "i";
  position: absolute;
  left: 0.95rem;
  top: 1rem;
  width: 1.25rem;
  height: 1.25rem;
  border-radius: 50%;
  background: var(--accent);
  color: var(--bg-panel);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  line-height: 1.25rem;
  text-align: center;
}

.callout-title {
  display: block;
  display: block;
  margin-bottom: 0.3rem;
  font-weight: 600;
  color: var(--text);
}

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

.callout-ok {
  background: color-mix(in srgb, var(--success) 10%, var(--bg-panel));
  border-left-color: var(--success);
}

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

.callout-note {
  background: color-mix(in srgb, var(--cream) 40%, var(--bg-panel));
  border-left-color: var(--warn);
}

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

/* ---------- 文末推广 / 延伸阅读 / 上下篇 ---------- */

.promo-block {
  margin-top: 2.6rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.2rem;
  padding: 1.7rem 1.6rem;
  border-radius: var(--r-xl);
  background: linear-gradient(120deg, var(--peach), var(--lilac) 55%, var(--sky));
  border: 1px solid color-mix(in srgb, var(--accent) 16%, transparent);
  box-shadow: var(--shadow-float);
}

.promo-copy b {
  display: block;
  font-family: var(--font-display);
  font-size: 1.24rem;
  color: var(--accent);
  margin-bottom: 0.3rem;
}

.promo-copy p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.75;
  color: var(--accent);
}

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

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

#related-posts {
  margin-top: 2.4rem;
  padding-top: 2.2rem;
  border-top: 1px solid var(--border);
}

.related-title {
  margin: 0 0 1.2rem;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 1.28rem;
  color: var(--text);
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(15rem, 1fr));
  gap: 1rem;
}

.related-card {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  padding: 1.2rem 1.1rem;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  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) 26%, var(--border));
  box-shadow: var(--shadow-card);
}

.related-card h3 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 1.02rem;
  line-height: 1.5;
}

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

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

.related-card .post-summary {
  font-size: 0.88rem;
  line-height: 1.72;
}

#post-nav {
  margin-top: 2rem;
  padding-bottom: 2.2rem;
}

.post-nav-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr));
  gap: 1rem;
}

.post-nav-card {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  padding: 1.1rem 1.15rem;
  background: var(--bg-panel2);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  text-decoration: none;
  transition: transform 0.2s ease, border-color 0.2s ease, background-color 0.2s ease;
}

.post-nav-card:hover {
  transform: translateY(-2px);
  border-color: color-mix(in srgb, var(--accent) 28%, var(--border));
  background: color-mix(in srgb, var(--peach) 26%, var(--bg-panel2));
}

.post-nav-dir {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.12em;
  color: var(--text-muted);
}

.post-nav-title {
  font-family: var(--font-display);
  font-size: 1rem;
  line-height: 1.5;
  color: var(--text);
}

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

/* ---------- 注册引导弹窗 ---------- */

.signup-modal-mask {
  position: fixed;
  inset: 0;
  z-index: 90;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.2rem;
  background: color-mix(in srgb, var(--accent-dark) 46%, transparent);
  opacity: 0;
  transition: opacity 0.24s ease;
}

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

.signup-modal-panel {
  position: relative;
  width: 100%;
  max-width: 26rem;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--r-xl);
  padding: 2rem 1.7rem 1.8rem;
  box-shadow: var(--shadow-window);
  transform: translateY(10px);
  transition: transform 0.24s ease;
}

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

.signup-modal-close {
  position: absolute;
  top: 0.85rem;
  right: 0.85rem;
  width: 2rem;
  height: 2rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-panel2);
  color: var(--text-muted);
  border: 1px solid var(--border);
  border-radius: 50%;
  cursor: pointer;
  transition: color 0.18s ease, background-color 0.18s ease;
}

.signup-modal-close:hover {
  color: var(--accent);
  background: color-mix(in srgb, var(--peach) 40%, var(--bg-panel2));
}

.signup-modal-brand {
  margin: 0 0 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.16em;
  color: var(--text-muted);
}

.signup-modal-title {
  margin: 0 0 0.7rem;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 1.42rem;
  line-height: 1.35;
  color: var(--text);
  text-wrap: pretty;
}

.signup-modal-text {
  margin: 0 0 1.3rem;
  font-size: 0.94rem;
  line-height: 1.8;
  color: var(--text-muted);
}

.signup-modal-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  width: 100%;
  justify-content: center;
}

.has-signup-modal {
  overflow: hidden;
}

/* ---------- 响应式 ---------- */

@media (max-width: 860px) {
  .prose table {
    display: block;
    width: fit-content;
    max-width: 100%;
    overflow-x: auto;
    min-width: 0;
  }

  .prose thead,
  .prose tbody,
  .prose tr {
    width: max-content;
    min-width: 100%;
  }

  .prose thead th,
  .prose tbody td {
    min-width: 8rem;
  }
}

@media (max-width: 768px) {
  .blog-page {
    padding-top: calc(var(--header-h) + 1.1rem);
  }

  .blog-hero {
    padding: 2.1rem 1.3rem 1.9rem;
    padding-inline: 1.3rem;
  }

  .stamp {
    top: 1rem;
    right: 1rem;
    width: 5rem;
    height: 5rem;
  }

  .stamp b {
    font-size: 1.15rem;
  }

  .article-hero {
    padding: 1.9rem 1.3rem 1.8rem;
    padding-inline: 1.3rem;
  }

  .prose,
  .breadcrumb {
    padding-inline: 1.3rem;
  }

  .article-hero h1 {
    padding-right: 0;
    font-size: clamp(1.5rem, 6vw, 1.9rem);
  }

  .article-hero .post-meta {
    padding-right: 0;
  }

  .article-hero .stamp {
    position: static;
    transform: rotate(-11deg);
    margin-bottom: 1rem;
  }

  .prose h2 {
    padding-left: 2.2rem;
    font-size: 1.3rem;
  }

  .promo-block {
    flex-direction: column;
    align-items: flex-start;
  }

  .promo-block .btn {
    width: 100%;
    justify-content: center;
  }

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

@media (max-width: 640px) {
  .no-break {
    white-space: normal;
  }

  .post-grid {
    grid-template-columns: 1fr;
  }
}

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

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