/* style.css — 入口样式文件，全部规则在 site.css */

/* =========================================================
   BG大游APP 指南站 · 版式：左导文档树 + 错位磁贴
   ========================================================= */

:root {
  --ink: #0b1417;
  --ink-2: #10232a;
  --panel: #14292f;
  --panel-2: #183238;
  --line: #26454d;
  --text: #e6eef0;
  --muted: #9fb6bb;
  --amber: #e0a33c;
  --amber-soft: #f0c67c;
  --radius: 6px;
  --mono: "IBM Plex Mono", "SFMono-Regular", ui-monospace, Menlo, monospace;
  --sans: "Inter", "Helvetica Neue", "PingFang SC", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  background:
    radial-gradient(circle at 12% -10%, rgba(224, 163, 60, 0.08), transparent 45%),
    radial-gradient(circle at 90% 0%, rgba(38, 69, 77, 0.55), transparent 50%),
    var(--ink);
  color: var(--text);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--amber-soft); text-decoration: none; }
a:hover { color: #fff; text-decoration: underline; text-underline-offset: 3px; }

/* 顶栏 */
.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 12px 20px;
  background: rgba(11, 20, 23, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); font-weight: 700; }
.brand img { width: 34px; height: 34px; border-radius: 6px; }
.brand span { font-size: 15px; white-space: nowrap; }
.brand small {
  display: block;
  font-family: var(--mono);
  font-size: 10px;
  color: var(--muted);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-weight: 400;
}
.menu-toggle {
  background: transparent;
  border: 1px solid var(--line);
  color: var(--text);
  font-size: 14px;
  padding: 7px 12px;
  border-radius: var(--radius);
  cursor: pointer;
  min-height: 40px;
}
.topnav { display: flex; gap: 4px; margin-left: auto; flex-wrap: wrap; }
.topnav a {
  font-size: 13px;
  color: var(--muted);
  padding: 6px 10px;
  border-radius: var(--radius);
  border: 1px solid transparent;
}
.topnav a:hover { color: var(--text); text-decoration: none; border-color: var(--line); }
.topnav a.is-active { color: var(--amber); border-color: rgba(224, 163, 60, 0.45); }
.topnav a.cf-link { font-family: var(--mono); font-size: 12px; }

/* 文档树布局 */
.shell {
  display: grid;
  grid-template-columns: 258px minmax(0, 1fr);
  max-width: 1280px;
  margin: 0 auto;
  align-items: start;
}
.sidebar {
  position: sticky;
  top: 62px;
  padding: 24px 16px 32px 20px;
  border-right: 1px solid var(--line);
  align-self: start;
}
.sidebar h2 {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 12px;
  font-weight: 500;
}
.tree { list-style: none; margin: 0 0 24px; padding: 0; }
.tree a {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  padding: 7px 10px 7px 14px;
  border-left: 2px solid var(--line);
  color: var(--muted);
  font-size: 14px;
}
.tree a:hover { color: var(--text); border-left-color: var(--amber); text-decoration: none; background: rgba(255,255,255,0.02); }
.tree a.is-active { color: var(--amber); border-left-color: var(--amber); }
.tree a em { font-family: var(--mono); font-size: 11px; font-style: normal; color: #6f878c; }
.side-note {
  font-size: 13px;
  color: var(--muted);
  border: 1px dashed var(--line);
  border-radius: var(--radius);
  padding: 12px;
  line-height: 1.7;
}

.main { padding: 28px 24px 56px; min-width: 0; }

.crumbs,
.breadcrumb {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--muted);
  margin: 0 0 14px;
}
.crumbs a, .breadcrumb a { color: var(--muted); }
.crumbs a:hover, .breadcrumb a:hover { color: var(--amber); }

.doc-head { margin-bottom: 26px; }
.eyebrow {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--amber);
  margin: 0 0 10px;
}
h1 {
  font-size: clamp(26px, 3.6vw, 42px);
  line-height: 1.22;
  margin: 0 0 12px;
  letter-spacing: -0.01em;
  color: #f2f7f8;
}
.lede { color: var(--muted); font-size: 16px; margin: 0 0 18px; max-width: 62ch; }

.hero-split {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  gap: 18px;
  align-items: stretch;
  margin: 0 0 34px;
}
.hero-copy {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(160deg, rgba(24, 50, 56, 0.85), rgba(11, 20, 23, 0.6));
  padding: 22px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.hero-copy h2 { margin: 0; font-size: 19px; }
.hero-copy p { margin: 0; color: var(--muted); font-size: 14.5px; }
.cta-row { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 4px; }
.btn {
  display: inline-block;
  padding: 10px 18px;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 600;
  border: 1px solid transparent;
  min-height: 44px;
}
.btn-primary { background: var(--amber); color: #14100a; }
.btn-primary:hover { background: #f0b859; color: #14100a; text-decoration: none; }
.btn-ghost { border-color: var(--line); color: var(--text); }
.btn-ghost:hover { border-color: var(--amber); color: var(--amber); text-decoration: none; }
.hero-figure { border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; background: #0e1f23; }
.hero-figure img { width: 100%; height: 100%; object-fit: cover; }

.stat-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  margin: 0 0 36px;
}
.stat { background: var(--ink-2); padding: 14px 16px; }
.stat b { display: block; font-family: var(--mono); font-size: 18px; color: var(--amber-soft); }
.stat span { font-size: 12px; color: var(--muted); }

.section { margin: 0 0 40px; }
.section-title { display: flex; align-items: baseline; gap: 12px; margin: 0 0 16px; }
.section-title h2 { font-size: 20px; margin: 0; }
.section-title span { font-family: var(--mono); font-size: 11px; color: var(--muted); letter-spacing: 0.12em; }

.tiles { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 14px; }
.tile {
  grid-column: span 2;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
.tile.wide { grid-column: span 3; }
.tile img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; }
.tile-body { padding: 14px 16px 18px; display: flex; flex-direction: column; gap: 8px; flex: 1; }
.tile-tag { font-family: var(--mono); font-size: 11px; color: var(--amber); letter-spacing: 0.1em; text-transform: uppercase; }
.tile h3 { margin: 0; font-size: 16px; line-height: 1.4; }
.tile h3 a { color: var(--text); }
.tile h3 a:hover { color: var(--amber); text-decoration: none; }
.tile p { margin: 0; font-size: 13.5px; color: var(--muted); }
.tile .more { margin-top: auto; font-size: 13px; color: var(--amber-soft); }

.cat-rail { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; }
.cat-card {
  border: 1px solid var(--line);
  border-left: 3px solid var(--amber);
  border-radius: var(--radius);
  background: rgba(20, 41, 47, 0.6);
  padding: 16px 18px;
}
.cat-card a strong { color: var(--text); font-size: 15px; }
.cat-card p { margin: 6px 0 0; font-size: 13px; color: var(--muted); }
.cat-card em { font-family: var(--mono); font-style: normal; font-size: 11px; color: #6f878c; }

.latest-list { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--line); }
.latest-list li {
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr) auto;
  gap: 14px;
  align-items: baseline;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}
.latest-list .date { font-family: var(--mono); font-size: 12px; color: var(--muted); }
.latest-list a { color: var(--text); font-size: 15px; }
.latest-list a:hover { color: var(--amber); text-decoration: none; }
.latest-list .cat { font-family: var(--mono); font-size: 11px; color: var(--amber); }

.split-block { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.75fr); gap: 20px; align-items: start; }
.panel {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--ink-2);
  padding: 18px 20px;
}
.panel h3 { margin: 0 0 8px; font-size: 16px; }
.panel p { margin: 0 0 10px; font-size: 14px; color: var(--muted); }
.panel ul { margin: 0; padding-left: 18px; color: var(--muted); font-size: 14px; }
.panel ul li { margin: 4px 0; }

.steps { counter-reset: s; list-style: none; margin: 0; padding: 0; }
.steps li {
  counter-increment: s;
  position: relative;
  padding: 0 0 16px 42px;
  border-left: 1px solid var(--line);
  margin-left: 12px;
}
.steps li:last-child { border-left-color: transparent; padding-bottom: 0; }
.steps li::before {
  content: counter(s, decimal-leading-zero);
  position: absolute;
  left: -13px;
  top: 0;
  width: 26px;
  height: 26px;
  display: grid;
  place-items: center;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--amber);
  background: var(--ink);
  border: 1px solid var(--line);
  border-radius: 50%;
}
.steps strong { display: block; color: var(--text); font-size: 14.5px; }
.steps p { margin: 4px 0 0; font-size: 13.5px; color: var(--muted); }

.figure-wide { border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.figure-wide img { width: 100%; object-fit: cover; }
.figure-cap { font-family: var(--mono); font-size: 11px; color: var(--muted); padding: 8px 12px; background: #0e1f23; }

.faq { border-top: 1px solid var(--line); }
.faq details { border-bottom: 1px solid var(--line); padding: 12px 0; }
.faq summary { cursor: pointer; color: var(--text); font-size: 15px; }
.faq summary:hover { color: var(--amber); }
.faq p { margin: 8px 0 0; color: var(--muted); font-size: 14px; }

.close-band {
  border: 1px solid rgba(224, 163, 60, 0.4);
  background: linear-gradient(120deg, rgba(224,163,60,0.12), rgba(20,41,47,0.5));
  border-radius: var(--radius);
  padding: 20px 22px;
}
.close-band h2 { margin: 0 0 6px; font-size: 18px; }
.close-band p { margin: 0; color: var(--muted); font-size: 14px; }

/* 栏目页 */
.cat-head { border-bottom: 1px solid var(--line); padding-bottom: 18px; margin-bottom: 8px; }
.cat-meta { font-family: var(--mono); font-size: 12px; color: var(--muted); margin: 0 0 12px; }
.index-list { list-style: none; margin: 0; padding: 0; }
.index-list li {
  display: grid;
  grid-template-columns: 120px minmax(0, 1fr);
  gap: 16px;
  padding: 16px 0;
  border-bottom: 1px dashed var(--line);
}
.index-list .stamp { font-family: var(--mono); font-size: 11px; color: var(--muted); line-height: 1.6; }
.index-list h3 { margin: 0 0 4px; font-size: 17px; }
.index-list h3 a { color: var(--text); }
.index-list h3 a:hover { color: var(--amber); text-decoration: none; }
.index-list p { margin: 0; font-size: 13.5px; color: var(--muted); }

/* 文章页 */
.article-grid { display: grid; grid-template-columns: minmax(0, 1fr) 232px; gap: 28px; align-items: start; }
.post-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--muted);
  margin: 0 0 18px;
}
.post-meta a { color: var(--amber-soft); }
.byline { color: var(--text); }
.post-hero { border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; margin: 0 0 24px; }
.post-hero img { width: 100%; }

.prose { font-size: 16px; }
.prose h2 { font-size: 22px; margin: 32px 0 10px; padding-top: 6px; border-top: 1px solid var(--line); }
.prose h3 { font-size: 17px; margin: 22px 0 8px; color: var(--amber-soft); }
.prose p { margin: 0 0 14px; }
.prose ul, .prose ol { margin: 0 0 16px; padding-left: 22px; color: #d3e2e5; }
.prose li { margin: 6px 0; }
.prose strong { color: #fff; }
.prose .callout {
  border-left: 3px solid var(--amber);
  background: rgba(224, 163, 60, 0.08);
  padding: 12px 16px;
  margin: 18px 0;
  font-size: 14.5px;
}
.prose .inline-fig { margin: 20px 0; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.prose .inline-fig figcaption { font-family: var(--mono); font-size: 11px; color: var(--muted); padding: 8px 12px; background: #0e1f23; }

.toc {
  position: sticky;
  top: 76px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--ink-2);
  padding: 14px 16px;
}
.toc h2 {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 10px;
  font-weight: 500;
}
.toc ol { margin: 0; padding-left: 18px; font-size: 13px; }
.toc li { margin: 6px 0; }
.toc a { color: var(--muted); }
.toc a:hover { color: var(--amber); }

.related { margin-top: 34px; border-top: 1px solid var(--line); padding-top: 18px; }
.related h2 { font-size: 16px; margin: 0 0 12px; }
.related ul { list-style: none; margin: 0; padding: 0; }
.related li { padding: 9px 0; border-bottom: 1px dashed var(--line); display: flex; gap: 10px; align-items: baseline; }
.related li span { font-family: var(--mono); font-size: 11px; color: var(--amber); flex: none; }
.related li a { color: var(--text); font-size: 14px; }
.related li a:hover { color: var(--amber); text-decoration: none; }
.backcat { margin-top: 18px; font-size: 13.5px; }

/* 页脚 */
.footer { border-top: 1px solid var(--line); background: #071013; margin-top: 20px; }
.footer-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 28px 24px 34px;
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: 24px;
}
.footer h2 {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 10px;
  font-weight: 500;
}
.footer p, .footer li { font-size: 13px; color: #a9bfc3; margin: 0 0 6px; }
.footer ul { list-style: none; margin: 0; padding: 0; }
.footer a { color: #cfe0e3; }
.footer a:hover { color: var(--amber); }
.footer-legal {
  border-top: 1px solid #132529;
  padding: 14px 24px 26px;
  max-width: 1280px;
  margin: 0 auto;
  font-size: 12.5px;
  color: #7e989c;
  display: flex;
  flex-wrap: wrap;
  gap: 6px 18px;
}
.footer-legal span { font-family: var(--mono); }

/* 移动端 */
@media (max-width: 900px) {
  .shell { grid-template-columns: 1fr; }
  .sidebar {
    position: static;
    border-right: 0;
    border-bottom: 1px solid var(--line);
    padding: 16px 18px 20px;
  }
  .hero-split, .split-block, .article-grid, .footer-inner { grid-template-columns: 1fr; }
  .tiles { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .tile, .tile.wide { grid-column: span 1; }
  .cat-rail { grid-template-columns: 1fr; }
  .stat-strip { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .toc { position: static; margin-bottom: 8px; }
}

@media (max-width: 768px) {
  .topnav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    background: #0b1417;
    border-bottom: 1px solid var(--line);
    padding: 8px 12px 14px;
  }
  .topnav.is-open { display: flex; }
  .topnav a { padding: 11px 12px; font-size: 14px; border-bottom: 1px solid #16282d; }
  .menu-toggle { display: inline-block; }
  .main { padding: 20px 16px 40px; }
  .index-list li { grid-template-columns: 1fr; gap: 6px; }
  .latest-list li { grid-template-columns: 1fr; gap: 2px; }
  .footer-inner { padding: 22px 16px; gap: 18px; }
  .footer-legal { padding: 12px 16px 22px; }
  .tiles { grid-template-columns: 1fr; }
  h1 { font-size: 25px; }
  .prose h2 { font-size: 19px; }
}

.menu-toggle { display: none; }
@media (min-width: 769px) { .menu-toggle { display: none !important; } }