/* ==========================================================================
   VPNLS · 博客样式包(列表页 + 文章页)
   所有颜色、圆角、阴影一律取自 base.css 的 :root 令牌,不写死色值。
   阅读列:面包屑 / hero / 正文 / 文末推广共用 .reading-wrap(56rem)。
   ========================================================================== */

/* ---------- 0. 阅读列 ---------- */
.reading-wrap {
  width: 100%;
  max-width: calc(56rem + var(--gutter) * 2);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* ---------- 1. 图章(列表页 hero / 文章页 hero 共用) ---------- */
.blog-hero-card,
.article-hero-card {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: var(--r-xl);
  box-shadow: var(--shadow-card);
}

.blog-hero-card::after,
.article-hero-card::after {
  content: "VPNLS";
  position: absolute;
  top: clamp(0.9rem, 2.6vw, 1.5rem);
  right: clamp(0.9rem, 2.6vw, 1.5rem);
  width: clamp(3.4rem, 7vw, 5.2rem);
  aspect-ratio: 1 / 1;
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: clamp(0.5rem, 0.9vw, 0.66rem);
  letter-spacing: 0.14em;
  color: var(--accent);
  border: 1px solid var(--accent-24);
  border-radius: 50%;
  box-shadow: inset 0 0 0 3px var(--bg-panel), inset 0 0 0 4px var(--accent-18);
  transform: rotate(-11deg);
  pointer-events: none;
}

/* ---------- 2. 列表页 hero ---------- */
.blog-hero {
  padding-block: clamp(1.6rem, 4vw, 2.6rem) clamp(1.2rem, 2.4vw, 1.8rem);
}

.blog-hero-card {
  background: var(--gradient-panel);
  padding: clamp(1.6rem, 3.4vw, 2.6rem) clamp(1.5rem, 3.4vw, 2.6rem);
}

.blog-hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0 0 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: var(--accent);
}

.blog-hero-kicker::before {
  content: "";
  width: 1.6rem;
  height: 2px;
  border-radius: var(--r-pill);
  background: var(--gradient-rule);
}

.blog-hero-title {
  margin: 0 0 0.7rem;
  font-size: clamp(1.9rem, 4.4vw, 3rem);
  line-height: 1.16;
  letter-spacing: -0.01em;
  color: var(--text);
  text-wrap: pretty;
}

.blog-hero-lede {
  max-width: 40rem;
  margin: 0 0 1.2rem;
  font-size: 1.02rem;
  line-height: 1.8;
  color: var(--text-muted);
}

/* ---------- 3. 标签筛选 ---------- */
.blog-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.filter-btn {
  appearance: none;
  min-height: 2.4rem;
  padding: 0.62rem 1rem;
  border: 1px solid var(--border);
  border-radius: var(--r-pill);
  background: var(--bg-panel);
  color: var(--text-muted);
  font-family: var(--font-body);
  font-size: 0.9rem;
  line-height: 1;
  cursor: pointer;
  transition: color var(--transition-base), background-color var(--transition-base), border-color var(--transition-base);
}

.filter-btn:hover {
  color: var(--accent);
  border-color: var(--accent-24);
}

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

/* ---------- 4. 列表页文章卡 ---------- */
.blog-list-sec {
  padding-block: clamp(1.2rem, 2.6vw, 2rem) clamp(2.2rem, 4.6vw, 3.2rem);
}

.blog-list-title {
  margin: 0 0 1rem;
  font-size: clamp(1.1rem, 2vw, 1.35rem);
  color: var(--text);
}

.post-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 19rem), 1fr));
  gap: 1rem;
}

.post-grid .post-card {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  height: 100%;
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

.post-grid .post-card:hover {
  transform: translateY(-2px);
  border-color: var(--accent-24);
  box-shadow: var(--shadow-lift);
}

.post-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
}

.post-tag {
  display: inline-flex;
  align-items: center;
  padding: 0.26rem 0.62rem;
  border-radius: var(--r-pill);
  background: var(--accent);
  color: var(--bg-panel);
  font-size: 0.76rem;
  line-height: 1.4;
}

.post-date {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--text-muted);
}

.post-title {
  margin: 0;
  font-size: clamp(1.05rem, 1.8vw, 1.22rem);
  line-height: 1.5;
  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: 1.75;
  color: var(--text-muted);
}

.post-more {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  margin-top: auto;
  padding-top: 0.3rem;
  font-size: 0.88rem;
  color: var(--accent);
  text-decoration: none;
}

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

.post-empty {
  margin: 1.2rem 0 0;
  color: var(--text-muted);
}

/* ---------- 5. 列表页文末推广 ---------- */
.blog-promo {
  padding-block: 0 clamp(2.4rem, 5vw, 3.6rem);
}

.promo-block {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem 1.4rem;
  padding: clamp(1.3rem, 3vw, 1.9rem);
  border: 1px solid var(--accent-dark);
  border-radius: var(--r-xl);
  background: var(--gradient-accent);
  box-shadow: var(--shadow-panel);
  color: var(--bg-panel);
}

.promo-block .promo-brand {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  color: var(--amber-soft);
}

.promo-block .promo-title {
  margin: 0.2rem 0 0.35rem;
  font-size: clamp(1.05rem, 2vw, 1.3rem);
  font-weight: 700;
  line-height: 1.45;
  color: var(--bg-panel);
}

.promo-block .promo-text {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.7;
  color: var(--bg-panel);
}

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

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

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

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

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

/* ---------- 6. 面包屑 ---------- */
.breadcrumb {
  margin-top: 1.4rem;
  padding-top: 0.4rem;
  font-size: 0.86rem;
  color: var(--text-muted);
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.breadcrumb li + li::before {
  content: "/";
  margin-right: 0.4rem;
  color: var(--text-soft);
}

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

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

/* ---------- 7. 文章 hero(stamp-corner) ---------- */
.article-hero {
  padding-block: 1rem clamp(1.2rem, 2.6vw, 1.8rem);
}

.article-hero-card {
  background: color-mix(in srgb, var(--bg-panel-2) 62%, var(--bg-panel));
  padding: clamp(1.5rem, 3.4vw, 2.4rem) clamp(1.5rem, 3.4vw, 2.6rem);
  /* 左右内衬外扩到页面留白:卡片加宽、内衬吃掉扩宽,标题与正文落在同一条阅读列 */
  margin-inline: calc(-1 * min(clamp(1.5rem, 3.4vw, 2.6rem), var(--gutter)));
  padding-inline: min(clamp(1.5rem, 3.4vw, 2.6rem), var(--gutter));
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin: 0 0 0.9rem;
}

.meta-tag {
  display: inline-flex;
  align-items: center;
  padding: 0.26rem 0.66rem;
  border-radius: var(--r-pill);
  background: var(--accent);
  color: var(--bg-panel);
  font-size: 0.78rem;
  line-height: 1.4;
}

.meta-date,
.meta-read {
  display: inline-flex;
  align-items: center;
  padding: 0.24rem 0.66rem;
  border: 1px solid var(--border-strong);
  border-radius: var(--r-pill);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--text-muted);
}

.article-title {
  max-width: 44rem;
  margin: 0 0 0.8rem;
  font-size: clamp(1.6rem, 3.6vw, 2.6rem);
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--text);
  text-wrap: pretty;
}

.article-summary {
  max-width: 44rem;
  margin: 0;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--text-muted);
}

/* ---------- 8. 正文排版 ---------- */
.article-body {
  counter-reset: h2c;
  padding-block: clamp(1.2rem, 2.6vw, 1.8rem) 0;
  font-size: 1rem;
  line-height: 1.88;
  color: var(--text);
}

.article-body > *:first-child {
  margin-top: 0;
}

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

.article-body h2 {
  counter-increment: h2c;
  margin: 2.2rem 0 0.7rem;
  font-size: clamp(1.28rem, 2.2vw, 1.6rem);
  line-height: 1.42;
  letter-spacing: 0;
  color: var(--text);
  text-wrap: pretty;
}

.article-body h2::before {
  content: counter(h2c, decimal-leading-zero);
  display: inline-block;
  margin-right: 0.55rem;
  padding: 0.08em 0.42em;
  border-radius: var(--r-xs);
  background: var(--accent-08);
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.74em;
  vertical-align: 0.08em;
}

.article-body h3 {
  margin: 1.7rem 0 0.6rem;
  font-size: clamp(1.08rem, 1.8vw, 1.3rem);
  line-height: 1.5;
  color: var(--text);
  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(--amber);
  vertical-align: 0.06em;
}

.article-body ul,
.article-body ol {
  margin: 0 0 1.05rem;
  padding-left: 1.3rem;
}

.article-body li {
  margin-bottom: 0.4rem;
}

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

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

.article-body code {
  padding: 0.1em 0.35em;
  border-radius: var(--r-xs);
  background: var(--accent-06);
  font-family: var(--font-mono);
  font-size: 0.88em;
  overflow-wrap: anywhere;
}

.article-body blockquote {
  margin: 1.3rem 0;
  padding: 0.9rem 1.1rem;
  border-left: 3px solid var(--amber);
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
  background: var(--amber-10);
  color: var(--text-muted);
}

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

/* 终端窗 */
.article-body pre {
  position: relative;
  margin: 1.3rem 0;
  padding: 2.1rem 1.1rem 1.1rem;
  border: 1px solid var(--accent);
  border-radius: var(--r-md);
  background: var(--accent-dark);
  color: var(--bg-panel);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.7;
  overflow-x: auto;
  box-shadow: var(--shadow-card);
}

.article-body pre::before {
  content: "终端记录";
  position: absolute;
  top: 0.55rem;
  left: 1.1rem;
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.1em;
  color: var(--amber);
}

.article-body pre::after {
  content: "";
  position: absolute;
  top: 0.9rem;
  right: 1.1rem;
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: var(--amber);
  box-shadow: -1rem 0 0 0 var(--amber-24);
}

.article-body pre code {
  padding: 0;
  background: none;
  color: inherit;
  font-size: inherit;
}

/* 表格:实色表头 + 斑马纹 + hover */
.article-body table {
  width: 100%;
  margin: 1.3rem 0;
  border-collapse: collapse;
  font-size: 0.92rem;
  min-width: 34rem;
}

.article-body caption {
  caption-side: top;
  padding-bottom: 0.5rem;
  text-align: left;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.article-body thead th {
  padding: 0.6rem 0.75rem;
  border: 1px solid var(--accent-dark);
  background: var(--accent);
  color: var(--bg-panel);
  font-weight: 600;
  text-align: left;
}

.article-body tbody td {
  padding: 0.55rem 0.75rem;
  border: 1px solid var(--border);
  vertical-align: top;
}

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

.article-body tbody tr:hover {
  background: var(--accent-06);
}

.table-scroll {
  max-width: 100%;
  overflow-x: auto;
}

.table-scroll table {
  min-width: 34rem;
}

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

/* ---------- 9. 正文组件三件套 ---------- */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 12rem), 1fr));
  gap: 0.9rem;
  margin: 1.4rem 0;
}

.stat-card {
  padding: 1rem 1.1rem;
  border: 1px solid var(--border);
  border-top: 4px solid var(--accent);
  border-radius: var(--r-md);
  background: var(--bg-panel);
  box-shadow: var(--shadow-card);
}

.stat-card:nth-child(even) {
  border-top-color: var(--amber);
  background: color-mix(in srgb, var(--amber) 9%, var(--bg-panel));
}

.stat-num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.4rem, 3vw, 1.9rem);
  line-height: 1.2;
  color: var(--accent);
}

.stat-card:nth-child(even) .stat-num {
  color: var(--amber-dark);
}

.stat-label {
  display: block;
  margin-top: 0.3rem;
  font-size: 0.86rem;
  line-height: 1.6;
  color: var(--text-muted);
}

.check-list {
  display: grid;
  gap: 0.6rem;
  margin: 1.2rem 0;
  padding: 0;
  list-style: none;
}

.check-list li {
  margin: 0;
  padding: 0.7rem 0.95rem;
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  background: var(--bg-panel);
  line-height: 1.7;
}

.verdict {
  margin: 1.3rem 0;
  padding: 0.95rem 1.1rem;
  border-left: 4px solid var(--accent);
  border-radius: var(--r-sm);
  background: var(--accent-06);
  line-height: 1.8;
}

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

/* ---------- 10. 提示块 ---------- */
.callout {
  position: relative;
  margin: 1.3rem 0;
  padding: 0.95rem 1.1rem 0.95rem 3rem;
  border-left: 4px solid var(--accent);
  border-radius: var(--r-sm);
  background: var(--accent-06);
  line-height: 1.8;
}

.callout::before {
  content: "i";
  position: absolute;
  top: 1rem;
  left: 0.9rem;
  width: 1.4rem;
  height: 1.4rem;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--accent);
  color: var(--bg-panel);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  line-height: 1;
}

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

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

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

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

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

/* ---------- 11. 步骤 ---------- */
.steps {
  margin: 1.3rem 0;
  padding-left: 1.4rem;
}

.steps li {
  margin-bottom: 0.9rem;
}

.steps h3 {
  margin: 0 0 0.3rem;
  font-size: clamp(1rem, 1.6vw, 1.12rem);
}

.steps h3::before {
  content: none;
}

/* ---------- 12. 延伸阅读 / 上一篇下一篇 ---------- */
#related-posts {
  padding-block: 1.2rem;
}

#related-posts h2 {
  margin: 0 0 0.8rem;
  font-size: clamp(1.1rem, 2vw, 1.35rem);
  color: var(--text);
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 16rem), 1fr));
  gap: 0.8rem;
}

.related-card {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  padding: 0.9rem 1rem;
  border: 1px solid var(--border);
  border-top: 3px solid var(--border);
  border-radius: var(--r-md);
  background: var(--bg-panel);
  color: inherit;
  text-decoration: none;
  transition: border-color var(--transition-base), transform var(--transition-base), box-shadow var(--transition-base);
}

.related-card:hover {
  border-top-color: var(--amber);
  transform: translateY(-2px);
  box-shadow: var(--shadow-card);
}

.related-tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--accent);
}

.related-title {
  font-weight: 600;
  line-height: 1.55;
  color: var(--text);
}

.related-date {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--text-muted);
}

#post-nav {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 15rem), 1fr));
  gap: 0.8rem;
  padding-block: 1.2rem;
}

.post-nav-link {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  padding: 0.9rem 1rem;
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  background: var(--bg-panel-2);
  color: inherit;
  text-decoration: none;
  transition: border-color var(--transition-base), transform var(--transition-base);
}

.post-nav-link:hover {
  border-color: var(--accent-24);
  transform: translateY(-2px);
}

.post-nav-label {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.06em;
  color: var(--accent);
}

.post-nav-title {
  font-weight: 600;
  line-height: 1.55;
  color: var(--text);
}

/* ---------- 13. 文末注册引导弹窗 ---------- */
html.modal-open,
html.modal-open body {
  overflow: hidden;
}

.signup-modal {
  position: fixed;
  inset: 0;
  z-index: 120;
  display: grid;
  place-items: center;
  padding: clamp(1rem, 4vw, 2rem);
}

.signup-modal[hidden] {
  display: none;
}

.signup-modal-backdrop {
  position: absolute;
  inset: 0;
  background: color-mix(in srgb, var(--accent-dark) 55%, transparent);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.signup-modal-panel {
  position: relative;
  z-index: 1;
  width: min(27rem, 100%);
  max-height: calc(100vh - 2rem);
  overflow: auto;
  padding: clamp(1.5rem, 4vw, 2rem);
  border: 1px solid var(--border);
  border-radius: var(--r-xl);
  background: var(--bg-panel);
  box-shadow: var(--shadow-window);
  opacity: 0;
  transform: translateY(14px) scale(0.98);
  transition: opacity var(--transition-base), transform var(--transition-base);
}

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

.signup-modal.is-open .signup-modal-panel {
  opacity: 1;
  transform: none;
}

.signup-modal-close {
  position: absolute;
  top: 0.6rem;
  right: 0.6rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: var(--r-pill);
  background: var(--bg-panel-2);
  color: var(--text-muted);
  cursor: pointer;
  transition: color var(--transition-base), border-color var(--transition-base);
}

.signup-modal-close:hover {
  color: var(--accent);
  border-color: var(--accent-24);
}

.signup-modal-brand {
  margin: 0 0 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  color: var(--accent);
}

.signup-modal-title {
  margin: 0 0 0.6rem;
  font-size: clamp(1.2rem, 3vw, 1.5rem);
  line-height: 1.35;
  color: var(--text);
  text-wrap: pretty;
}

.signup-modal-text {
  margin: 0 0 1.1rem;
  font-size: 0.94rem;
  line-height: 1.75;
  color: var(--text-muted);
}

/* ---------- 14. 悬浮 CTA(文章页用,列表页不放) ---------- */
.float-cta {
  position: fixed;
  right: clamp(0.9rem, 3vw, 1.6rem);
  bottom: clamp(0.9rem, 3vw, 1.6rem);
  z-index: 60;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  max-width: calc(100vw - 1.8rem);
  padding: 0.7rem 1.1rem;
  border: 1px solid var(--accent-dark);
  border-radius: var(--r-pill);
  background: var(--gradient-accent);
  color: var(--bg-panel);
  font-family: var(--font-body);
  font-size: 0.94rem;
  font-weight: 600;
  line-height: 1;
  text-decoration: none;
  box-shadow: var(--shadow-float);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

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

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

/* ---------- 15. 窄屏修正 ---------- */
@media (max-width: 640px) {
  .blog-hero-card,
  .article-hero-card {
    padding-top: 4.6rem;
  }

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

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

  .promo-block .promo-actions {
    width: 100%;
  }
}

/* ---------- 16. 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  .filter-btn,
  .post-grid .post-card,
  .related-card,
  .post-nav-link,
  .signup-modal-backdrop,
  .signup-modal-panel,
  .float-cta {
    transition: none;
  }

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

  .signup-modal-panel {
    transform: none;
  }
}