/* theme-doupi · 共用样式（文章页 / 单页 / 归档 / 分类 / 标签 / 错误页） */
:root{
  --pad:clamp(20px,4.6vw,68px);
  --bg:#FAFAFC; --bg-2:#F2F2F5; --ink:#1D1D1F; --muted:#86868B;
  --line:rgba(0,0,0,.10); --card:#FFFFFF;
  --sans:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --mono:"SF Mono",ui-monospace,Menlo,Consolas,"Liberation Mono",monospace;
  --ease:cubic-bezier(.16,1,.3,1);
  --wrap:1120px;
}
*{box-sizing:border-box}
html{overflow-x:clip; scroll-behavior:smooth}
body{margin:0; background:var(--bg); color:var(--ink); font:16.5px/1.75 var(--sans);
  -webkit-font-smoothing:antialiased; letter-spacing:-.011em}
a{color:inherit; text-decoration:none}
img{max-width:100%; height:auto}
::selection{background:rgba(0,0,0,.09)}

/* ---------- nav ---------- */
.nav{position:sticky; top:0; z-index:50; display:flex; align-items:center; justify-content:space-between;
  gap:20px; padding:10px clamp(18px,4.6vw,68px); background:color-mix(in srgb,var(--bg) 86%, transparent);
  backdrop-filter:blur(18px) saturate(180%); border-bottom:1px solid transparent; transition:border-color .3s}
.nav.solid{border-bottom-color:var(--line)}
.brand{display:flex; align-items:baseline; gap:8px; font-weight:600; letter-spacing:-.02em; font-size:15px}
.brand small{font-family:var(--mono); font-size:9.5px; letter-spacing:.16em; color:var(--muted)}
.nav nav{display:flex; gap:clamp(12px,2vw,26px); font-size:13.5px; color:var(--muted)}
.nav nav a:hover{color:var(--ink)}
.nav nav a.on{color:var(--ink); font-weight:500}

/* ---------- 通用页头 ---------- */
.wrap{max-width:var(--wrap); margin:0 auto; padding:0 clamp(18px,4.6vw,68px)}
.hero{padding:clamp(46px,7vw,110px) 0 clamp(20px,3vw,36px)}
.kicker{font-family:var(--mono); font-size:10.5px; letter-spacing:.2em; text-transform:uppercase;
  color:var(--muted); margin:0 0 14px}
h1.title{font-size:clamp(38px,6.4vw,92px); line-height:1.02; letter-spacing:-.045em; margin:0 0 16px; font-weight:600}
.lead{margin:0; color:var(--muted); font-size:15px; max-width:54em; line-height:1.8}
.lead b{color:var(--ink); font-weight:500}

/* ---------- 文章 ---------- */
.post-head{padding:clamp(36px,5.6vw,86px) 0 clamp(14px,2vw,22px)}
.post-meta{display:flex; flex-wrap:wrap; gap:8px 16px; align-items:center; margin-top:14px;
  font-family:var(--mono); font-size:11px; letter-spacing:.08em; color:var(--muted)}
.post-meta .dot{width:3px; height:3px; border-radius:50%; background:var(--muted); opacity:.6}
.post-cover{margin:clamp(18px,3vw,30px) 0 0; border-radius:18px; overflow:hidden; background:var(--bg-2)}
.post-cover img{display:block; width:100%; max-height:min(58vh,560px); object-fit:cover}

.prose{max-width:720px; margin:0 auto; padding:clamp(26px,4.4vw,52px) clamp(18px,4.6vw,0px) 0; font-size:16.5px; line-height:1.95}
.prose > *:first-child{margin-top:0}
.prose p{margin:0 0 1.15em}
.prose h2{font-size:24px; line-height:1.35; letter-spacing:-.02em; margin:2em 0 .7em; font-weight:600}
.prose h3{font-size:19px; line-height:1.4; margin:1.7em 0 .6em; font-weight:600}
.prose h4{font-size:16.5px; margin:1.5em 0 .5em}
.prose img{border-radius:14px; margin:1.4em 0; box-shadow:0 12px 40px rgba(0,0,0,.06)}
.prose figure{margin:1.6em 0}
.prose figcaption{font-size:12px; color:var(--muted); text-align:center; margin-top:8px; font-family:var(--mono)}
.prose a{color:var(--ink); border-bottom:1px solid color-mix(in srgb,var(--ink) 35%, transparent)}
.prose a:hover{border-bottom-color:var(--ink)}
.prose blockquote{margin:1.6em 0; padding:2px 0 2px 20px; border-left:2px solid color-mix(in srgb,var(--ink) 25%, transparent); color:#3a3a3e}
.prose ul,.prose ol{padding-left:1.35em; margin:0 0 1.15em}
.prose li{margin:.3em 0}
.prose code{font-family:var(--mono); font-size:.88em; background:var(--bg-2); padding:2px 6px; border-radius:5px}
.prose pre{background:#141416; color:#F5F5F7; padding:16px 18px; border-radius:12px; overflow:auto; margin:1.6em 0; font-size:13.5px; line-height:1.7}
.prose pre code{background:none; padding:0; color:inherit; font-size:inherit}
.prose hr{border:0; border-top:1px solid var(--line); margin:2.4em 0}
.prose table{width:100%; border-collapse:collapse; font-size:14.5px; margin:1.6em 0}
.prose th,.prose td{border-bottom:1px solid var(--line); padding:9px 10px; text-align:left}

.pager{display:grid; grid-template-columns:1fr 1fr; gap:12px; max-width:720px; margin:clamp(40px,6vw,80px) auto 0;
  padding:0 clamp(18px,4.6vw,0px)}
.pager a{padding:16px 18px; border:1px solid var(--line); border-radius:14px; transition:background .2s, transform .2s var(--ease)}
.pager a:hover{background:var(--bg-2); transform:translateY(-2px)}
.pager .dir{font-family:var(--mono); font-size:10px; letter-spacing:.16em; text-transform:uppercase; color:var(--muted)}
.pager .t{display:block; margin-top:6px; font-size:14.5px; line-height:1.5}
.pager .next{text-align:right}

/* ---------- 列表（归档 / 分类 / 标签） ---------- */
.list{margin:clamp(20px,3vw,34px) 0 0; border-top:1px solid var(--line)}
.list-year{display:flex; align-items:baseline; gap:14px; padding:26px 0 6px}
.list-year h2{font-size:clamp(26px,3.6vw,40px); letter-spacing:-.04em; margin:0; font-weight:600; line-height:1}
.list-year span{font-family:var(--mono); font-size:10px; letter-spacing:.14em; color:var(--muted); text-transform:uppercase}
.item{display:grid; grid-template-columns:86px 1fr auto; gap:clamp(8px,1.6vw,20px); align-items:baseline;
  padding:11px 2px; border-bottom:1px solid color-mix(in srgb,var(--line) 65%, transparent);
  transition:background .18s, padding-left .18s}
.item:hover{background:color-mix(in srgb,var(--bg-2) 70%, transparent); padding-left:8px}
.item .d{font-family:var(--mono); font-size:12px; color:var(--muted)}
.item .t{font-size:15px}
.item .n{font-family:var(--mono); font-size:11px; color:var(--muted)}
.chips{display:flex; flex-wrap:wrap; gap:8px; margin-top:18px}
.chip{font-size:12.5px; padding:5px 12px; border:1px solid var(--line); border-radius:999px; color:var(--muted)}
.chip:hover{border-color:color-mix(in srgb,var(--ink) 30%, transparent); color:var(--ink)}
.chip.on{background:var(--ink); border-color:var(--ink); color:var(--bg)}

.pagination{display:flex; gap:8px; justify-content:center; margin:clamp(34px,5vw,64px) 0 0;
  font-family:var(--mono); font-size:12px}
.pagination a,.pagination span{padding:7px 12px; border:1px solid var(--line); border-radius:9px; color:var(--muted)}
.pagination .current{background:var(--ink); border-color:var(--ink); color:var(--bg)}

/* ---------- footer ---------- */
.footer{margin-top:clamp(60px,9vw,140px); border-top:1px solid var(--line); background:#0A0A0C; color:#F5F5F7}
.footer .in{max-width:var(--wrap); margin:0 auto; padding:clamp(40px,6vw,88px) clamp(18px,4.6vw,68px) clamp(24px,3vw,40px);
  display:grid; grid-template-columns:1.3fr 1fr 1fr 1.2fr; gap:clamp(20px,3vw,40px)}
.footer h3{margin:0 0 14px; font-size:clamp(26px,3.4vw,42px); letter-spacing:-.045em; font-weight:600}
.footer p{margin:0; font-size:12.5px; color:#A1A1A6; line-height:1.7}
.footer h4{margin:0 0 12px; font-family:var(--mono); font-size:10px; letter-spacing:.16em;
  text-transform:uppercase; color:#6E6E73; font-weight:400}
.footer a{font-size:13px; color:#D2D2D7; display:block; padding:3px 0}
.footer a:hover{color:#fff}
.footer .row{display:flex; justify-content:space-between; gap:12px; font-size:12.5px; color:#A1A1A6; padding:4px 0}
.footer .base{max-width:var(--wrap); margin:0 auto; padding:18px clamp(18px,4.6vw,68px) 34px;
  border-top:1px solid rgba(255,255,255,.10); display:flex; flex-wrap:wrap; gap:10px 24px;
  justify-content:space-between; font-family:var(--mono); font-size:10.5px; letter-spacing:.1em; color:#6E6E73}

@media (max-width:880px){
  .item{grid-template-columns:70px 1fr; }
  .item .n{display:none}
  .pager{grid-template-columns:1fr}
  .pager .next{text-align:left}
  .footer .in{grid-template-columns:1fr 1fr}
}
@media (max-width:560px){
  .footer .in{grid-template-columns:1fr}
}