/* ============================================================
   v2ray.cn — shared styles (blog + article + language switcher)
   ============================================================ */
:root {
  --bg: #0b0d10;
  --bg-raise: #111419;
  --bg-card: #14181e;
  --line: #232a33;
  --line-soft: #1a2027;
  --text: #e8ebee;
  --text-2: #9aa4b0;
  --text-3: #5f6a76;
  --accent: #e5484d;
  --accent-dim: rgba(229, 72, 77, 0.12);
  --green: #46a758;
  --amber: #d6a35c;
  --mono: ui-monospace, "Cascadia Code", "JetBrains Mono", Consolas, "Courier New", monospace;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Vazirmatn", Tahoma, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
.wrap { max-width: 1080px; margin: 0 auto; padding: 0 28px; }
.wrap-narrow { max-width: 760px; margin: 0 auto; padding: 0 28px; }

/* ---------- header / nav (shared) ---------- */
header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(11, 13, 16, 0.82);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line-soft);
}
.nav {
  display: flex; align-items: center; justify-content: space-between;
  height: 60px; gap: 20px;
}
.brand {
  display: flex; align-items: center; gap: 7px;
  font-family: var(--mono);
  font-size: 17px; font-weight: 700; letter-spacing: 0.02em;
  white-space: nowrap;
}
.brand-logo { width: 26px; height: 26px; flex: none; }
.brand em { color: var(--accent); font-style: normal; }
.nav-links { display: flex; align-items: center; gap: 28px; font-size: 14px; color: var(--text-2); }
.nav-links > a:hover { color: var(--text); }
.nav-links a.active { color: var(--text); }

/* ---------- language switcher (native <details>) ---------- */
details.lang-switch { position: relative; }
details.lang-switch > summary {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 12px; border: 1px solid var(--line); border-radius: 6px;
  color: var(--text-2); font-size: 13.5px; cursor: pointer;
  background: transparent; transition: border-color .15s, color .15s;
  list-style: none; user-select: none; white-space: nowrap;
}
details.lang-switch > summary::-webkit-details-marker { display: none; }
details.lang-switch > summary::marker { content: ""; }
details.lang-switch > summary:hover { color: var(--text); border-color: var(--text-3); }
details.lang-switch > summary svg { width: 14px; height: 14px; opacity: .7; }
details.lang-switch > summary .caret { width: 9px; height: 9px; transition: transform .15s; }
details.lang-switch[open] > summary .caret { transform: rotate(180deg); }
.lang-menu {
  display: none;
  position: absolute; right: 0; top: calc(100% + 8px);
  min-width: 172px;
  background: var(--bg-raise);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 18px 44px rgba(0,0,0,0.5);
  padding: 6px;
  z-index: 60;
}
details.lang-switch[open] > .lang-menu { display: block; }
.lang-menu a {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  width: 100%; text-align: left;
  padding: 8px 12px; border-radius: 5px;
  color: var(--text); font-size: 14px;
  transition: background .12s, color .12s;
}
.lang-menu a:hover { background: var(--bg-card); }
.lang-menu a.sel::after { content: "✓"; color: var(--accent); font-size: 13px; }
[dir="rtl"] .lang-menu { right: auto; left: 0; }
[dir="rtl"] .lang-menu a { text-align: right; }

/* ---------- blog index ---------- */
.blog-hero { padding: 66px 0 30px; border-bottom: 1px solid var(--line-soft); }
.kicker {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--mono); font-size: 12px; letter-spacing: 0.14em;
  color: var(--text-3); text-transform: uppercase; margin-bottom: 16px;
}
.kicker::before { content: ""; width: 24px; height: 1px; background: var(--accent); }
[dir="rtl"] .kicker { letter-spacing: 0; }
.blog-hero h1 { font-size: 38px; font-weight: 700; letter-spacing: -0.02em; }
.blog-hero p { color: var(--text-2); margin-top: 14px; max-width: 620px; }

.filters { display: flex; flex-wrap: wrap; gap: 10px; padding: 26px 0 4px; }
.filters button {
  font-size: 13px; color: var(--text-2);
  padding: 6px 14px; border: 1px solid var(--line); border-radius: 20px;
  background: transparent; cursor: pointer; font-family: inherit;
  transition: border-color .15s, color .15s, background .15s;
}
.filters button:hover { color: var(--text); border-color: var(--text-3); }
.filters button.on { color: var(--text); border-color: var(--accent); background: var(--accent-dim); }

.post-list { padding: 30px 0 90px; }
.post {
  display: grid; grid-template-columns: 120px 1fr; gap: 26px;
  padding: 26px 0; border-bottom: 1px solid var(--line-soft);
  align-items: start;
}
.post:hover .post-title { color: var(--accent); }
.post-meta { font-family: var(--mono); font-size: 12px; color: var(--text-3); line-height: 1.9; }
.post-cat { display: inline-block; color: var(--accent); }
.post-title { font-size: 20px; font-weight: 650; letter-spacing: -0.01em; transition: color .15s; }
.post-excerpt { color: var(--text-2); font-size: 14.5px; margin-top: 7px; }
.post-read { display: inline-flex; align-items: center; gap: 6px; margin-top: 12px; font-size: 13.5px; color: var(--text-2); }
.post-read::after { content: "→"; transition: transform .15s; }
[dir="rtl"] .post-read::after { content: "←"; }
.post:hover .post-read::after { transform: translateX(3px); }
[dir="rtl"] .post:hover .post-read::after { transform: translateX(-3px); }

/* ---------- article ---------- */
.article { padding: 56px 0 90px; }
.crumbs { font-family: var(--mono); font-size: 12.5px; color: var(--text-3); margin-bottom: 26px; }
.crumbs a:hover { color: var(--text-2); }
.crumbs span { color: var(--line); margin: 0 8px; }
.article h1 { font-size: 34px; font-weight: 700; line-height: 1.25; letter-spacing: -0.02em; }
.article-meta { font-family: var(--mono); font-size: 12.5px; color: var(--text-3); margin-top: 16px; display: flex; gap: 8px; flex-wrap: wrap; }
.article-meta span + span::before { content: "/"; margin-right: 8px; color: var(--line); }
.article-body { margin-top: 38px; font-size: 16px; color: var(--text); }
.article-body > * + * { margin-top: 18px; }
.article-body h2 { font-size: 21px; font-weight: 650; margin-top: 40px; letter-spacing: -0.01em; }
.article-body h3 { font-size: 17px; font-weight: 650; margin-top: 28px; color: var(--text); }
.article-body p { color: var(--text-2); }
.article-body ul, .article-body ol { color: var(--text-2); padding-inline-start: 22px; }
.article-body li { margin-top: 7px; }
.article-body strong { color: var(--text); font-weight: 650; }
.article-body a { color: var(--accent); border-bottom: 1px solid rgba(229,72,77,0.3); }
.article-body a:hover { border-color: var(--accent); }
.article-body code {
  font-family: var(--mono); font-size: 13.5px;
  background: var(--bg-raise); border: 1px solid var(--line-soft);
  padding: 1px 6px; border-radius: 4px; color: var(--text);
  word-break: break-word;
}
.article-body pre {
  background: var(--bg-raise); border: 1px solid var(--line);
  border-radius: 8px; padding: 16px 18px; overflow-x: auto;
  font-family: var(--mono); font-size: 13px; line-height: 1.7; color: var(--text-2);
  direction: ltr; text-align: left;
}
.article-body pre code { background: none; border: 0; padding: 0; color: inherit; }
/* keep command/code blocks left-to-right even in RTL layouts */
[dir="rtl"] .article-body pre { direction: ltr; text-align: left; }
[dir="rtl"] .article-meta span + span::before { margin-left: 8px; margin-right: 0; }
[dir="rtl"] .crumbs span { margin: 0 8px; }
.callout {
  border: 1px solid var(--line-soft); border-inline-start: 2px solid var(--amber);
  border-radius: 6px; padding: 14px 18px; font-size: 14.5px; color: var(--text-2);
  background: var(--bg-card);
}
.article-foot {
  margin-top: 50px; padding-top: 26px; border-top: 1px solid var(--line-soft);
  display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
}
.btn-ghost {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 14px; color: var(--text-2);
  padding: 11px 18px; border: 1px solid var(--line); border-radius: 8px;
  transition: color .15s, border-color .15s;
}
.btn-ghost:hover { color: var(--text); border-color: var(--text-3); }

.related { margin-top: 20px; }
.related h3 { font-size: 13px; font-family: var(--mono); letter-spacing: .08em; text-transform: uppercase; color: var(--text-3); margin-bottom: 14px; }
.related a { display: block; padding: 12px 0; border-bottom: 1px solid var(--line-soft); color: var(--text-2); font-size: 14.5px; transition: color .15s; }
.related a:hover { color: var(--accent); }

/* ---------- footer (shared) ---------- */
footer {
  border-top: 1px solid var(--line-soft);
  padding: 40px 0 48px;
  font-size: 13px; color: var(--text-3);
}
.foot-row { display: flex; justify-content: space-between; gap: 24px; flex-wrap: wrap; }
.foot-row .brand-logo { width: 22px; height: 22px; }
.foot-links { display: flex; gap: 24px; }
.foot-links a:hover { color: var(--text-2); }
.foot-note { margin-top: 18px; max-width: 720px; line-height: 1.8; }

/* ---------- responsive ---------- */
@media (max-width: 720px) {
  .nav-links { gap: 16px; }
  .nav-links .hide-m { display: none; }
  .post { grid-template-columns: 1fr; gap: 8px; }
  .post-meta { display: flex; gap: 12px; }
  .blog-hero h1 { font-size: 30px; }
  .article h1 { font-size: 27px; }
}

/* ==== promo (机场推广位) 开始 ==== */
/* ===========================================================
   promo.css — 合作机场推广位样式（跨站通用）
   -----------------------------------------------------------
   后期只改这个片段即可调整全站广告外观。
   颜色写死在这里，不依赖本站变量，因此在深色/浅色站都能用。

   如需改链接或文案，改 tools/build.js 顶部的 PROMO / PROMO_URL，
   然后重跑 node tools/build.js。页面里的广告块用成对注释
   <!-- promo:xxx --> … <!-- /promo:xxx --> 包裹，也可脚本整块替换。
   =========================================================== */

.promo {
  --promo-c1: #2563eb;
  --promo-c2: #7c3aed;
  --promo-c3: #0891b2;
  --promo-fg: #ffffff;
  --promo-sub: rgba(255, 255, 255, .82);
  --promo-chip-bg: rgba(255, 255, 255, .14);
  --promo-chip-fg: #a5f3fc;
  --promo-radius: 14px;

  display: block;
  position: relative;
  box-sizing: border-box;
  border-radius: var(--promo-radius);
  background: linear-gradient(105deg, var(--promo-c1) 0%, var(--promo-c2) 55%, var(--promo-c3) 100%);
  color: var(--promo-fg);
  text-decoration: none;
  overflow: hidden;
  isolation: isolate;
  transition: transform .16s ease, box-shadow .16s ease, filter .16s ease;
}

.promo::after {
  /* 柔和高光，避免大色块显得死板 */
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: radial-gradient(120% 140% at 88% 0%, rgba(255, 255, 255, .17), transparent 58%);
  pointer-events: none;
}

.promo:hover {
  transform: translateY(-1px);
  box-shadow: 0 14px 30px -16px rgba(15, 23, 42, .58);
  filter: saturate(1.06);
}

.promo:focus-visible {
  outline: 2px solid var(--promo-chip-fg);
  outline-offset: 3px;
}

/* 角标：合作/广告标识 */
.promo-chip {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  flex: none;
  padding: 3px 10px;
  border: 1px solid rgba(255, 255, 255, .38);
  border-radius: 999px;
  background: var(--promo-chip-bg);
  color: var(--promo-chip-fg);
  font-size: 11.5px;
  font-weight: 700;
  line-height: 1.5;
  white-space: nowrap;
}

.promo-chip svg { width: 12px; height: 12px; flex: none; }

.promo-title {
  display: block;
  font-size: 15.5px;
  font-weight: 800;
  line-height: 1.45;
  letter-spacing: -.1px;
  color: var(--promo-fg);
}

.promo-desc {
  display: block;
  font-size: 12.8px;
  line-height: 1.65;
  color: var(--promo-sub);
}

.promo-cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  flex: none;
  padding: 8px 15px;
  border-radius: 9px;
  background: rgba(255, 255, 255, .96);
  color: #1e2a63;
  font-size: 13px;
  font-weight: 800;
  white-space: nowrap;
}

.promo-cta svg { width: 13px; height: 13px; transition: transform .16s ease; }
.promo:hover .promo-cta svg { transform: translateX(2px); }

/* ---------- 变体 1：通栏横幅（首屏下方 / 下载区下方） ---------- */
.promo-banner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 18px;
  padding: 15px 20px;
}

.promo-banner .promo-copy {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
  flex: 1 1 260px;
}

.promo-banner .promo-cta { margin-inline-start: auto; }

/* ---------- 变体 2：卡片（侧栏 / 下载卡片旁） ---------- */
.promo-card {
  padding: 18px 18px 16px;
}

.promo-card .promo-title { margin-top: 10px; }
.promo-card .promo-desc { margin-top: 6px; }
.promo-card .promo-cta {
  margin-top: 14px;
  width: 100%;
  justify-content: center;
}

/* ---------- 变体 3：文章正文内嵌 ---------- */
.promo-inline {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 16px;
  padding: 15px 18px;
  margin: 30px 0;
}

.promo-inline .promo-copy {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
  flex: 1 1 240px;
}

.promo-inline .promo-title { font-size: 14.8px; }
.promo-inline .promo-cta { margin-inline-start: auto; }

/* ---------- 响应式 ---------- */
@media (max-width: 680px) {
  .promo-banner,
  .promo-inline {
    align-items: flex-start;
    padding: 14px 16px;
  }
  .promo-banner .promo-cta,
  .promo-inline .promo-cta {
    margin-inline-start: 0;
    width: 100%;
    justify-content: center;
  }
  .promo-title { font-size: 14.6px; }
  .promo-desc { font-size: 12.4px; }
}

/* ---------- RTL（波斯语站点） ---------- */
[dir="rtl"] .promo-cta svg { transform: rotate(180deg); }
[dir="rtl"] .promo:hover .promo-cta svg { transform: rotate(180deg) translateX(2px); }

/* ---------- 深色站点微调：降低亮度避免刺眼 ---------- */
@media (prefers-color-scheme: dark) {
  .promo { filter: saturate(.96); }
}

/* ---------- 本站布局适配：广告位所在的容器 ---------- */
/* 首页 hero 与「下载」区块之间的独立色带 */
.promo-slot-top { padding: 34px 0; border-bottom: 1px solid var(--line-soft); }
.hp .promo-slot-top + section { padding-top: 60px; }
/* 首页下载区块内，紧贴下载卡片与提示条下方 */
.promo-slot-dl { margin-top: 18px; }
/* 博客列表页，分类筛选条上方 */
.promo-slot-list { padding-top: 30px; }
/* ==== promo (机场推广位) 结束 ==== */

/* 防止站点内容区链接色规则（如 .article-body a）覆盖广告文字色。
   广告是独立组件，配色不应随所在区块变化。改动广告配色请改上方 .promo 的变量。 */
a.promo, a.promo:link, a.promo:visited, a.promo:hover, a.promo:active { color: var(--promo-fg) !important; }
a.promo .promo-title { color: var(--promo-fg) !important; }
a.promo .promo-desc  { color: var(--promo-sub) !important; }
a.promo .promo-chip  { color: var(--promo-chip-fg) !important; }
a.promo .promo-cta   { color: #1e2a63 !important; }