/* 骨架 f3：极简阅读（单列窄栏、无侧栏、大留白、衬线标题）
   特征：无卡片无边框，只用细线与留白分隔；文章正文首行缩进 */
.f3-wrap { max-width: min(760px, var(--width)); margin: 0 auto; padding: 0 22px; }

.f3-hd { border-bottom: 1px solid var(--line); background: var(--bg); }
.f3-hd-in { display: flex; align-items: center; justify-content: space-between; gap: 20px; min-height: 74px; flex-wrap: wrap; }
.f3-brand { font-family: Georgia, "Songti SC", "SimSun", serif; font-size: 22px; color: var(--txt); letter-spacing: 1px; }
.f3-brand:hover { color: var(--brand); }
.f3-nav { display: flex; gap: 22px; flex-wrap: wrap; }
.f3-nav a { font-size: 13px; color: var(--mut); letter-spacing: .5px; padding-bottom: 2px; border-bottom: 1px solid transparent; }
.f3-nav a:hover { color: var(--brand); border-bottom-color: var(--brand); }
.f3-nav a.on { color: var(--txt); border-bottom-color: var(--txt); }

.f3-main { padding-top: 46px; padding-bottom: 30px; }
.f3-crumb { font-size: 12px; color: #a1a1aa; margin-bottom: 22px; letter-spacing: .5px; }
.f3-crumb a { color: var(--mut); }
.f3-crumb a:hover { color: var(--brand); }
.f3-crumb span { margin: 0 4px; color: #d4d4d8; }

.f3-intro { padding-bottom: 34px; }
.f3-eyebrow { font-size: 11px; letter-spacing: 4px; color: var(--brand); margin-bottom: 14px; }
.f3-intro h1 { font-family: Georgia, "Songti SC", "SimSun", serif; font-size: 38px; line-height: 1.35; font-weight: 600; letter-spacing: 1px; }
.f3-lede { margin-top: 16px; font-size: 15px; line-height: 2; color: var(--mut); max-width: 640px; }

.f3-sec { padding: 30px 0 8px; border-top: 1px solid var(--line); margin-top: 8px; }
.f3-intro + .f3-sec { border-top: 0; padding-top: 0; }
.f3-sec-t { font-family: Georgia, "Songti SC", "SimSun", serif; font-size: 15px; letter-spacing: 3px; color: var(--mut); margin-bottom: 12px; font-weight: 400; }
.f3-page-t { font-family: Georgia, "Songti SC", "SimSun", serif; font-size: 30px; line-height: 1.4; letter-spacing: .5px; }
.f3-page-s { font-size: 12.5px; color: #a1a1aa; margin: 10px 0 6px; letter-spacing: .5px; }

.f3-list { list-style: none; }
.f3-list li { display: flex; gap: 16px; padding: 22px 0; border-bottom: 1px solid var(--line); }
.f3-list li:last-child { border-bottom: 0; }
.f3-n { flex: none; width: 26px; font-size: 12px; color: #c4c4c8; font-family: Georgia, serif; padding-top: 5px; }
.f3-li-b { min-width: 0; }
.f3-li-t { font-size: 18px; line-height: 1.65; color: var(--txt); font-weight: 500; }
.f3-li-t:hover { color: var(--brand); }
.f3-li-d { font-size: 13.5px; line-height: 1.9; color: var(--mut); margin-top: 7px; }
.f3-li-m { font-size: 11.5px; color: #a1a1aa; margin-top: 8px; letter-spacing: .5px; }

.f3-more { display: flex; gap: 22px; padding: 20px 0 6px; font-size: 13px; }
.f3-more a { color: var(--brand); border-bottom: 1px solid var(--brand); padding-bottom: 1px; }

.f3-hot { list-style: none; }
.f3-hot li { padding: 14px 0; border-bottom: 1px solid var(--line); display: flex; flex-direction: column; gap: 5px; }
.f3-hot li:last-child { border-bottom: 0; }
.f3-hot a { font-size: 16px; color: var(--txt); line-height: 1.6; }
.f3-hot a:hover { color: var(--brand); }
.f3-hot span { font-size: 11.5px; color: #a1a1aa; }
.f3-hot-lg li { padding: 18px 0; }
.f3-hot-lg a { font-size: 17px; }
.f3-hot-d { font-size: 13px; color: var(--mut); line-height: 1.8; }

.f3-index { font-size: 14px; line-height: 2.3; }
.f3-index a { color: var(--mut); }
.f3-index a:hover { color: var(--brand); border-bottom: 1px solid var(--brand); }
.f3-dot { color: #d4d4d8; margin: 0 8px; }

.f3-pager { display: flex; gap: 16px; align-items: center; padding: 24px 0 10px; font-size: 13px; flex-wrap: wrap; }
.f3-pager a { color: var(--mut); }
.f3-pager a:hover { color: var(--brand); }
.f3-pager span.on { color: var(--txt); border-bottom: 1px solid var(--txt); }
.f3-empty { color: #a1a1aa; font-size: 14px; padding: 10px 0; }

.f3-art { padding: 4px 0 26px; }
.f3-art-kicker { font-size: 11px; letter-spacing: 3px; color: var(--brand); margin-bottom: 12px; }
.f3-art h1 { font-family: Georgia, "Songti SC", "SimSun", serif; font-size: 35px; line-height: 1.42; font-weight: 600; letter-spacing: .5px; }
.f3-art-meta { font-size: 12px; color: #a1a1aa; margin: 18px 0 30px; padding-bottom: 18px; border-bottom: 1px solid var(--line); letter-spacing: .5px; }
.f3-art-cover { margin-bottom: 26px; }
.f3-art-cover img { width: 100%; display: block; }
.f3-art-body { font-size: 17px; line-height: 2.1; color: #27272a; }
.f3-art-body p { margin: 0 0 20px; text-indent: 2em; }
.f3-art-body h2 { font-family: Georgia, "Songti SC", "SimSun", serif; font-size: 22px; margin: 34px 0 14px; text-indent: 0; letter-spacing: .5px; }
.f3-art-body h3 { font-size: 18px; margin: 24px 0 10px; text-indent: 0; }
.f3-art-body img { max-width: 100%; height: auto; }
.f3-art-body blockquote { border-left: 2px solid var(--brand); padding-left: 18px; color: var(--mut); margin: 20px 0; }
.f3-art-tags { margin-top: 30px; padding-top: 16px; border-top: 1px solid var(--line); font-size: 13px; line-height: 2; }
.f3-art-tags a { color: var(--brand); }
.f3-art-note { font-size: 13px; color: var(--mut); line-height: 1.9; margin: 10px 0; }

.f3-pn { display: flex; justify-content: space-between; gap: 22px; padding: 20px 0; border-top: 1px solid var(--line); font-size: 13.5px; }
.f3-pn a { color: var(--mut); line-height: 1.6; max-width: 48%; }
.f3-pn a:hover { color: var(--brand); }
.f3-pn-n { text-align: right; margin-left: auto; }
.f3-rel { margin-top: 10px; }

.f3-ft { margin-top: 60px; border-top: 1px solid var(--line); padding: 28px 0 40px; text-align: center; }
.f3-ft-links { font-size: 11.5px; color: #a1a1aa; line-height: 2.2; }
.f3-ft-lbl { margin-right: 8px; color: #8f8f96; letter-spacing: 1px; }
.f3-ft-links a { color: #a1a1aa; margin: 0 7px; }
.f3-ft-links a:hover { color: var(--brand); }
.f3-ft-cp { font-size: 12px; color: var(--mut); margin-top: 12px; }
.f3-ft-note { font-size: 11.5px; color: #b4b4b8; margin-top: 6px; }

@media (max-width: 700px) {
  .f3-main { padding-top: 28px; }
  .f3-intro h1 { font-size: 28px; }
  .f3-art h1 { font-size: 25px; }
  .f3-art-body { font-size: 16px; line-height: 2; }
  .f3-li-t { font-size: 16.5px; }
  .f3-pn { flex-direction: column; }
  .f3-pn a { max-width: 100%; }
  .f3-pn-n { text-align: left; margin-left: 0; }
  .f3-hd-in { min-height: 60px; }
  .f3-nav { gap: 14px; }
}