*, *::before, *::after { box-sizing: border-box; }
body { margin: 0; font: 15px/1.7 -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif; color: #e5e7eb; background: #0f1115; }
a { color: inherit; text-decoration: none; }
a:hover { color: var(--accent); }
img { max-width: 100%; height: auto; display: block; }
.wrap { max-width: 1180px; margin: 0 auto; padding: 0 16px; }

.gd-header { background: rgba(15, 17, 21, .95); border-bottom: 1px solid #23262d; position: sticky; top: 0; z-index: 10; }
.gd-header-inner { display: flex; align-items: center; gap: 24px; height: 60px; }
.gd-brand { display: flex; align-items: center; gap: 8px; font-weight: 800; font-size: 18px; color: #fff; }
.gd-brand img { border-radius: 8px; }
.gd-nav { display: flex; gap: 4px; overflow-x: auto; white-space: nowrap; flex: 1; }
.gd-nav a { padding: 6px 12px; border-radius: 6px; color: #9ca3af; }
.gd-nav a.active { color: #fff; background: #23262d; }
.gd-cta { background: var(--accent); color: #111 !important; font-weight: 700; padding: 8px 18px; border-radius: 999px; }

.gd-hero { background: radial-gradient(circle at 30% 20%, #2a2f3a, #0f1115 70%); background-size: cover; background-position: center; padding: 72px 0 56px; text-align: center; }
.gd-hero-inner { display: flex; flex-direction: column; align-items: center; }
.gd-icon { border-radius: 22px; box-shadow: 0 10px 30px rgba(0, 0, 0, .5); margin-bottom: 14px; }
.gd-hero h1 { font-size: 44px; margin: 0; color: #fff; letter-spacing: 2px; }
.gd-slogan { font-size: 18px; color: #d1d5db; margin: 8px 0 24px; }
.dl-buttons { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; }
.dl-btn { display: flex; flex-direction: column; align-items: center; min-width: 150px; padding: 10px 22px; border-radius: 12px; background: var(--accent); color: #111 !important; font-weight: 700; font-size: 16px; }
.dl-btn:hover { filter: brightness(1.1); }
.dl-os { font-size: 11px; font-weight: 600; opacity: .7; letter-spacing: 1px; }
.dl-closed { color: #9ca3af; border: 1px dashed #4b5563; border-radius: 10px; padding: 10px 20px; }
.dl-info { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px 22px; margin: 18px 0 0; font-size: 13px; }
.dl-info div { display: flex; gap: 6px; }
.dl-info dt { color: #9ca3af; }
.dl-info dd { margin: 0; color: #f3f4f6; }

.gd-main { padding: 32px 16px 48px; }
.gd-block { background: #171a21; border: 1px solid #23262d; border-radius: 14px; padding: 20px 22px; margin-bottom: 22px; }
.gd-title { display: flex; justify-content: space-between; align-items: baseline; font-size: 19px; margin: 0 0 14px; color: #fff; }
.gd-title::before { content: ""; width: 4px; height: 18px; background: var(--accent); border-radius: 2px; margin-right: 10px; align-self: center; }
.gd-title a:first-child { flex: 1; }
.gd-title .more { font-size: 13px; color: #9ca3af; font-weight: 400; }
.gd-gallery { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 14px; }
.gd-gallery a { position: relative; border-radius: 10px; overflow: hidden; }
.gd-gallery img { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; transition: transform .3s; }
.gd-gallery a:hover img { transform: scale(1.05); }
.gd-gallery span { position: absolute; left: 0; right: 0; bottom: 0; padding: 18px 10px 8px; background: linear-gradient(transparent, rgba(0, 0, 0, .85)); font-size: 13px; color: #fff; }
.gd-columns { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 22px; }
.gd-columns .gd-block { margin-bottom: 0; }
.gd-columns + .gd-block { margin-top: 22px; }
.gd-list { list-style: none; margin: 0; padding: 0; }
.gd-list li { display: flex; gap: 10px; align-items: baseline; padding: 7px 0; border-bottom: 1px solid #23262d; }
.gd-list li a:not(.tag) { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.gd-list time { color: #6b7280; font-size: 12px; flex: none; }
.tag { font-size: 12px; color: var(--accent); border: 1px solid var(--accent); border-radius: 4px; padding: 0 6px; flex: none; }

.gd-two { display: grid; grid-template-columns: minmax(0, 1fr) 320px; gap: 22px; align-items: start; }
.gd-sticky { position: sticky; top: 80px; text-align: center; }
.gd-sticky .gd-title { justify-content: center; }
.gd-sticky .dl-buttons { flex-direction: column; }
.crumbs { margin: 0 0 8px; font-size: 13px; color: #6b7280; }
.desc { color: #9ca3af; margin-top: -6px; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chips a { background: #23262d; border-radius: 999px; padding: 2px 12px; font-size: 13px; }
.gd-cards { list-style: none; margin: 0; padding: 0; }
.gd-cards li { display: flex; gap: 14px; padding: 14px 0; border-bottom: 1px solid #23262d; }
.gd-cards img { width: 180px; aspect-ratio: 16 / 10; object-fit: cover; border-radius: 8px; }
.gd-cards .title { font-size: 17px; font-weight: 700; color: #fff; }
.gd-cards p { margin: 4px 0; color: #9ca3af; font-size: 14px; }
.gd-cards time { color: #6b7280; font-size: 12px; }
.gd-article-title { font-size: 28px; color: #fff; margin: 0 0 8px; line-height: 1.4; }
.meta { display: flex; flex-wrap: wrap; gap: 12px; color: #6b7280; font-size: 13px; align-items: center; }
.gd-cover { margin: 16px 0; }
.gd-cover img { border-radius: 10px; width: 100%; }
.gd-body { font-size: 16px; line-height: 1.9; color: #d1d5db; }
.gd-body h2, .gd-body h3 { color: #fff; }
.gd-body a { color: var(--accent); }
.gd-body img { border-radius: 8px; margin: 12px auto; }
.gd-body table { border-collapse: collapse; width: 100%; }
.gd-body th, .gd-body td { border: 1px solid #374151; padding: 6px 10px; }
.gd-body blockquote { margin: 14px 0; padding: 8px 14px; border-left: 3px solid var(--accent); background: #1f232b; }

.pagination { display: flex; justify-content: center; gap: 12px; margin-top: 16px; font-size: 14px; }
.pagination a { border: 1px solid #374151; border-radius: 6px; padding: 3px 12px; }
.empty { color: #6b7280; text-align: center; }
.gd-footer { border-top: 1px solid #23262d; color: #6b7280; font-size: 13px; text-align: center; padding: 24px 0; }
.gd-intro { max-width: 720px; margin: 18px auto 0; color: #9ca3af; font-size: 14px; }
.gd-hero-nav { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px; margin-top: 18px; }
.gd-hero-nav a { padding: 3px 14px; border: 1px solid rgba(255, 255, 255, .2); border-radius: 999px; font-size: 13px; color: #d1d5db; }
.gd-post-nav { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin: 22px 0; }
.gd-post-nav a { display: block; padding: 10px 14px; border: 1px solid #23262d; border-radius: 10px; font-size: 14px; color: #e5e7eb; }
.gd-post-nav a.next { grid-column: 2; text-align: right; }
.gd-post-nav span { display: block; font-size: 12px; color: #6b7280; }
.gd-footer .seo-footer-nav a:hover { color: var(--accent); }
.gd-main .seo-related ul a, .gd-main .seo-chip, .gd-main .seo-tag { border-color: #374151; }

@media (max-width: 900px) {
  .gd-two { grid-template-columns: 1fr; }
  .gd-sticky { position: static; }
  .gd-hero h1 { font-size: 32px; }
  .gd-cards img { width: 110px; }
  .gd-cta { display: none; }
  .gd-header-inner { gap: 12px; }
  .gd-hero { padding: 40px 0 32px; }
}

@media (max-width: 560px) {
  .gd-hero h1 { font-size: 26px; }
  .gd-slogan { font-size: 15px; }
  .gd-post-nav { grid-template-columns: 1fr; }
  .gd-post-nav a.next { grid-column: auto; }
  .gd-block { padding: 16px; }
}

/* ---- SEO 公共区块与响应式基础（各主题共用，类名以 seo- 开头） ---- */
img,
video {
  max-width: 100%;
  height: auto;
}

table:not([class]) {
  display: block;
  max-width: 100%;
  overflow-x: auto;
  border-collapse: collapse;
  -webkit-overflow-scrolling: touch;
}

pre {
  max-width: 100%;
  overflow-x: auto;
}

.seo-footer-nav {
  margin: 0 0 12px;
  font-size: 13px;
}

.seo-footer-nav ul {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 6px 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.seo-footer-nav ul ul {
  display: inline-flex;
  gap: 4px 10px;
  margin-left: 8px;
  opacity: 0.8;
}

.seo-footer-nav a {
  color: inherit;
  text-decoration: none;
}

.seo-footer-nav a:hover {
  text-decoration: underline;
}

.seo-related,
.seo-tags,
nav.seo-back {
  margin: 24px 0;
}

.seo-related h2 {
  margin: 0 0 10px;
  font-size: 16px;
}

.seo-related ul {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.seo-related ul a,
.seo-chip,
.seo-tag {
  display: inline-block;
  padding: 4px 12px;
  font-size: 13px;
  line-height: 1.6;
  color: inherit;
  text-decoration: none;
  border: 1px solid rgba(127, 127, 127, 0.35);
  border-radius: 999px;
}

.seo-tag {
  background: rgba(127, 127, 127, 0.08);
}

.seo-tags {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.seo-tags-label {
  font-size: 13px;
  opacity: 0.75;
}

.seo-back {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 12px;
}

.seo-back-link {
  font-weight: 600;
}

.seo-paged-title {
  margin: 0 0 16px;
  font-size: 22px;
}

@media (max-width: 640px) {
  .seo-footer-nav ul ul {
    display: none;
  }

  .seo-related ul a,
  .seo-chip {
    padding: 6px 12px;
  }
}