/* ============================================================
   深信号 · DEEPSIGNAL — 信号母题全站皮肤
   设计: 阿衍 (π) / 2026-09-09
   纸上底 + 信号琥珀 #a97a35 + mono 信号语言（简约版）
   ============================================================ */
:root{
  --bg:#faf9f4;
  --panel:#f4f2ec;
  --panel2:#edeae1;
  --ink:#23252b;
  --dim:#5c616b;
  --faint:#9aa0ab;
  --sig:#a97a35;
  --sig-soft:rgba(169,122,53,.10);
  --line:rgba(35,37,43,.10);
  --grid:rgba(35,37,43,.035);
  --sans:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Noto Sans SC","Microsoft YaHei","DengXian",sans-serif;
  --mono:ui-monospace,"SF Mono",Menlo,Consolas,"Courier New",monospace;
}
*{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;overflow-y:scroll;}
body{
  background:var(--bg);color:var(--ink);
  font-family:var(--sans);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
  line-height:1.8;
}
::selection{background:var(--sig);color:#2a2620;}
::-webkit-scrollbar{width:10px;height:10px;}
::-webkit-scrollbar-thumb{background:#d8d4c9;border-radius:6px;border:2px solid var(--bg);}
::-webkit-scrollbar-track{background:transparent;}
a{color:inherit;text-decoration:none;}
.wrap{max-width:1080px;margin:0 auto;padding:0 32px;}
.hidden{display:none!important;}
.btn{display:inline-flex;align-items:center;justify-content:center;border-radius:8px;padding:8px 18px;font-size:13px;font-weight:700;cursor:pointer;font-family:inherit;border:none;transition:.18s;letter-spacing:.02em;}
.btn-solid{background:var(--sig);color:#2a2620;}
.btn-solid:hover{filter:brightness(1.1);}
.btn-ghost2{background:transparent;color:var(--sig);border:1px solid rgba(169,122,53,.45);}
.btn-ghost2:hover{border-color:var(--sig);background:var(--sig-soft);}

/* ============ 顶栏 (滚动下滑入) ============ */
.topbar{
  position:fixed;top:0;left:0;right:0;z-index:90;
  background:rgba(250,249,244,.86);
  backdrop-filter:blur(16px) saturate(140%);-webkit-backdrop-filter:blur(16px) saturate(140%);
  border-bottom:1px solid var(--line);
  transform:translateY(-110%);
  transition:transform .3s ease;
  will-change:transform;
}
body.scrolled .topbar{transform:translateY(0);}
.topbar .wrap{display:flex;align-items:center;gap:30px;height:54px;}
.brand{display:flex;align-items:center;gap:10px;font-size:15px;font-weight:600;letter-spacing:.04em;color:var(--ink);flex:none;white-space:nowrap;}
.brand .dot{
  width:6px;height:6px;border-radius:50%;background:var(--sig);
}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.35}}
.brand em{font-style:normal;font-family:var(--mono);font-size:10px;letter-spacing:.28em;color:var(--faint);margin-left:2px;}
.catnav{display:flex;gap:22px;font-size:13.5px;color:var(--dim);min-width:0;}
.topbar .catnav{flex:1;justify-content:center;}
.catnav a{transition:color .2s;white-space:nowrap;border-bottom:1px solid transparent;padding-bottom:2px;}
.catnav a:hover{color:var(--sig);border-bottom-color:rgba(169,122,53,.5);}
.nav{display:flex;gap:14px;align-items:center;font-size:12px;flex:none;color:var(--dim);}
.nav a,.topacts a{font-family:var(--mono);letter-spacing:.1em;transition:color .2s;}
.nav a:hover,.topacts a:hover{color:var(--sig);}
.nav .rss,.topacts .rss{border:1px solid var(--line);border-radius:999px;padding:2px 12px;letter-spacing:1.5px;}
.nav .rss:hover,.topacts .rss:hover{border-color:rgba(169,122,53,.5);}
.nav .ic-search,.topacts .ic-search{display:inline-flex;align-items:center;padding:2px;}
.topacts{display:inline-flex;align-items:center;gap:16px;flex:none;color:var(--dim);}

/* ============ 首页台头: 信号监听台 ============ */
.masthead{position:relative;padding:9vh 0 5vh;border-bottom:1px solid var(--line);overflow:hidden;}

.masthead .wrap{position:relative;}
.mast-row{display:flex;justify-content:space-between;align-items:center;gap:18px;flex-wrap:wrap;margin-bottom:6vh;}
.kicker{font-family:var(--mono);font-size:11px;letter-spacing:.5em;color:var(--sig);}
.kicker::before{content:"▮ ";}
.masthead h1{
  font-size:clamp(52px,10vw,120px);font-weight:800;letter-spacing:-.015em;line-height:1.02;
}
.masthead h1 .dot{color:var(--sig);}
.lead{margin-top:2.6vh;max-width:42em;font-size:15.5px;line-height:2;color:var(--dim);}
.lead .lead-sig{display:inline-block;margin-left:10px;font-family:var(--mono);font-size:11px;color:var(--faint);letter-spacing:.1em;}
.wave{margin-top:6.5vh;width:100%;}
.wave svg{display:block;width:100%;height:auto;}
.wave .scan{stroke:var(--sig);stroke-width:1.4;fill:none;opacity:.5;}
.wave .ghost{stroke:var(--sig);stroke-width:1.2;fill:none;opacity:.16;}
.wavecap{margin-top:12px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:6px;font-family:var(--mono);font-size:10.5px;letter-spacing:.16em;color:var(--faint);}


/* ============ 首页头条 ============ */
.hero-story{position:relative;border-bottom:1px solid var(--line);padding:7vh 0;}
.hero-story .tag{
  display:inline-block;font-size:10.5px;font-family:var(--mono);letter-spacing:.24em;color:var(--sig);
  border:1px solid rgba(169,122,53,.5);padding:3px 11px;margin-bottom:3vh;
}
.hero-story h2{font-size:clamp(24px,3.4vw,38px);font-weight:700;line-height:1.38;letter-spacing:.01em;max-width:24em;}
.hero-story h2 a:hover{color:var(--sig);}
.hero-story .sum{margin-top:2.4vh;max-width:48em;font-size:15px;line-height:2;color:var(--dim);}
.hero-story .meta{margin-top:3vh;display:flex;flex-wrap:wrap;gap:10px;align-items:baseline;font-family:var(--mono);font-size:11.5px;letter-spacing:.1em;color:var(--faint);}
.hero-story .meta .sig{color:var(--sig);}
.hero-story .meta .go{color:var(--dim);transition:color .2s;}
.hero-story:hover .meta .go{color:var(--sig);}
.hero-story .meta .sep{opacity:.45;}

/* ============ 情报流列表 ============ */
.feed-head{padding:6vh 0 2vh;display:flex;align-items:baseline;gap:16px;}
.feed-head .fn{font-family:var(--mono);font-size:11px;letter-spacing:.4em;color:var(--faint);white-space:nowrap;}
.feed-head .fline{flex:1;height:1px;background:var(--line);}
.filters{display:flex;gap:8px;flex-wrap:wrap;margin:4px 0 8px;}
.chip{border:1px solid var(--line);background:transparent;color:var(--dim);border-radius:999px;padding:4px 15px;font-size:12.5px;cursor:pointer;font-family:inherit;transition:.16s;letter-spacing:.04em;}
.chip:hover{color:var(--sig);border-color:rgba(169,122,53,.45);}
.chip.on{background:var(--sig);color:#2a2620;border-color:var(--sig);font-weight:600;}
.grid{list-style:none;margin:8px 0 8vh;}
.card.entry{
  display:grid;grid-template-columns:96px 1fr auto;
  gap:26px;align-items:baseline;
  padding:20px 4px;
  border-bottom:1px solid var(--line);
  position:relative;
  transition:background .25s;
}
.card.entry:hover{background:linear-gradient(90deg,rgba(169,122,53,.05),transparent 70%);}
.card.entry .date{font-family:var(--mono);font-size:11.5px;color:var(--faint);letter-spacing:.06em;}
.card.entry h3{font-size:16.5px;font-weight:600;line-height:1.6;}
.card.entry h3 a{color:var(--ink);}
.card.entry h3 a:hover{color:var(--sig);}
.card.entry .cat{
  font-family:var(--mono);font-size:10px;letter-spacing:.14em;
  color:var(--dim);border:1px solid var(--line);padding:2px 10px;white-space:nowrap;
  transition:border-color .2s,color .2s;justify-self:end;
}
.card.entry:hover .cat{color:var(--sig);border-color:rgba(169,122,53,.45);}
.card.entry::before{
  content:"";position:absolute;left:0;top:22%;bottom:22%;width:2px;
  background:var(--sig);opacity:0;transition:opacity .25s;
  
}
.card.entry:hover::before{opacity:1;}
.empty-card{border:1px dashed rgba(90,98,121,.5);border-radius:12px;text-align:center;color:var(--faint);padding:48px 0;font-size:14px;}

/* ============ 标签 / 归档面板 ============ */
.s-box{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:18px 18px 12px;margin:6px 0 30px;}
.s-box h2{font-size:12px;font-weight:400;letter-spacing:2px;color:var(--faint);font-family:var(--mono);margin:0 0 14px;text-transform:uppercase;}
.s-list{display:flex;flex-wrap:wrap;gap:8px;padding-bottom:6px;}
.sb{border:1px solid var(--line);background:transparent;color:var(--dim);border-radius:16px;padding:3px 12px;font-size:12.5px;cursor:pointer;display:inline-flex;align-items:center;gap:6px;transition:.15s;font-family:inherit;}
.sb i{font-style:normal;font-size:10px;color:var(--faint);}
.sb:hover{color:var(--sig);border-color:rgba(169,122,53,.45);}
.sb.on{background:var(--sig);color:#2a2620;border-color:var(--sig);}
.sb.on i{color:rgba(20,16,10,.6);}
.s-none{color:var(--faint);font-size:12.5px;font-style:normal;}

/* ============ 文章页 ============ */
.article{width:100%;}
.art-top{display:flex;align-items:center;gap:26px;flex-wrap:wrap;padding:34px 0 4px;}
.art-top .brand{font-size:14.5px;}
.art-top .brand .dot{width:6px;height:6px;}
.art-top .back{font-size:12.5px;color:var(--faint);font-family:var(--mono);letter-spacing:.05em;flex:none;transition:color .2s;}
.art-top .back:hover{color:var(--sig);}
.art-top .catnav{margin-left:auto;}
.ahead{max-width:820px;margin:0 auto;padding:7vh 0 4vh;position:relative;}

.ahead > *{position:relative;}
.ahead .atag{display:inline-block;font-size:10.5px;font-family:var(--mono);letter-spacing:.24em;color:var(--sig);border:1px solid rgba(169,122,53,.5);padding:3px 11px;margin-bottom:2.6vh;}
.ahead h1{font-size:clamp(28px,4.4vw,48px);font-weight:800;line-height:1.32;letter-spacing:.005em;max-width:20em;}
.ahead .meta{margin-top:2.8vh;display:flex;flex-wrap:wrap;gap:10px;align-items:center;font-family:var(--mono);font-size:11.5px;color:var(--faint);letter-spacing:.08em;}
.ahead .meta .src,.ahead .meta .date{color:var(--dim);}
.ahead .meta .cat-t{color:var(--sig);}
.ahead .meta .sep{opacity:.45;}
.ahead .meta .tags{display:inline-flex;flex-wrap:wrap;gap:8px;margin-left:6px;}
.tag{font-size:10px;font-family:var(--mono);letter-spacing:.12em;color:var(--dim);border:1px solid var(--line);padding:2px 9px;border-radius:2px;transition:.15s;}
.ahead .meta .tag:hover{color:var(--sig);border-color:rgba(169,122,53,.5);}
/* 摘要快读 */
.summary{margin-top:4vh;max-width:680px;background:var(--panel);border-left:2px solid var(--sig);padding:20px 24px;border-radius:0 12px 12px 0;}
.summary .lbl{font-family:var(--mono);font-size:10px;letter-spacing:.3em;color:var(--sig);margin-bottom:10px;}
.summary p{font-size:15px;line-height:2;color:var(--dim);}
/* 封面主视觉 */
.coverband{margin:4vh auto 0;max-width:760px;padding:0;}
.coverband img{width:100%;max-height:400px;object-fit:cover;display:block;border-radius:16px;border:1px solid var(--line);background:var(--panel);}
/* 正文 */
.prose{max-width:760px;margin:0 auto;padding:4vh 0 3vh;}
.prose p{font-size:16.5px;line-height:2.15;color:#3f434b;margin-bottom:1.9em;}
.prose h2{
  display:flex;align-items:baseline;gap:14px;
  font-size:21px;font-weight:700;letter-spacing:.03em;color:var(--ink);
  margin:4.5em 0 1.2em;
}
.prose h2::before{content:attr(data-n);font-family:var(--mono);font-size:11px;color:var(--sig);letter-spacing:.14em;flex:none;}
.prose h2::after{content:"";flex:1;height:1px;background:var(--line);}
.prose h3{font-size:16px;font-weight:700;color:var(--ink);margin:2.4em 0 .9em;letter-spacing:.02em;}
.prose h3::before{content:"▸ ";color:var(--sig);}
.prose strong{color:var(--ink);font-weight:700;}
.prose b{color:var(--ink);}
.prose em{font-style:normal;color:var(--sig);}
.prose a{color:var(--sig);text-decoration:underline;text-underline-offset:3px;text-decoration-color:rgba(169,122,53,.4);transition:.15s;}
.prose a:hover{text-decoration-color:var(--sig);}
.prose blockquote{
  border-left:2px solid var(--sig);background:var(--panel);
  border-radius:0 12px 12px 0;padding:4px 22px 8px;margin:2.2em 0;
}
.prose blockquote p{color:#4a4f58;margin:.9em 0;}
.prose ul,.prose ol{margin:1.6em 0 2em;padding-left:0;list-style:none;}
.prose li{position:relative;padding-left:1.6em;margin:.6em 0;font-size:15.5px;line-height:2;color:#3f434b;}
.prose ul > li::before{content:"";position:absolute;left:.2em;top:.95em;width:5px;height:5px;border-radius:50%;background:var(--sig);}
.prose ol{counter-reset:olist;}
.prose ol > li{counter-increment:olist;}
.prose ol > li::before{content:counter(olist,decimal-leading-zero);position:absolute;left:0;top:.1em;font-family:var(--mono);font-size:10.5px;color:var(--sig);letter-spacing:.05em;}
.prose hr{border:0;border-top:1px dashed rgba(90,98,121,.5);margin:3.5em 0;}
.prose code{background:#efece4;border:1px solid var(--line);border-radius:4px;padding:1px 7px;font-size:13.5px;font-family:var(--mono);color:var(--sig);}
.prose pre{background:#f1efe8;border:1px solid var(--line);border-radius:12px;padding:18px 20px;overflow-x:auto;font-size:13px;line-height:1.8;font-family:var(--mono);margin:2em 0;color:#3f434b;}
.prose pre code{background:none;border:none;padding:0;color:inherit;}
.prose figure.mdimg{margin:2.4em 0;text-align:center;}
.prose figure.mdimg img{width:100%;border-radius:14px;border:1px solid var(--line);display:block;background:var(--panel);}
.prose figure.mdimg figcaption{margin-top:10px;font-size:12.5px;color:var(--faint);letter-spacing:.04em;line-height:1.8;}
.prose .twrap{overflow-x:auto;margin:2em 0;border:1px solid var(--line);border-radius:12px;background:var(--panel);}
.prose table{border-collapse:collapse;width:100%;font-size:14px;min-width:560px;}
.prose th{background:var(--panel2);color:var(--sig);text-align:left;padding:10px 14px;font-weight:700;font-family:var(--mono);font-size:12px;letter-spacing:.06em;white-space:nowrap;}
.prose td{border-top:1px solid var(--line);padding:9px 14px;color:#3f434b;vertical-align:top;line-height:1.85;}
/* 情报档案 */
.intel-box{
  margin:4.5em 0 2em;border:1px solid var(--line);background:var(--panel);
  border-radius:14px;padding:24px 26px;position:relative;overflow:hidden;
}
.intel-box::before{content:"";position:absolute;top:0;left:0;right:0;height:2px;background:linear-gradient(90deg,var(--sig),transparent 60%);}
.intel-box .ib-k{font-family:var(--mono);font-size:10.5px;letter-spacing:.3em;color:var(--sig);font-weight:400;}
.intel-box h4{font-size:16.5px;font-weight:700;color:var(--ink);margin:10px 0 6px;line-height:1.6;}
.intel-box p{font-size:13.5px;color:var(--dim);margin:8px 0;line-height:1.95;}
.intel-box .ib-acts{display:flex;gap:10px;margin-top:18px;flex-wrap:wrap;}
.intel-box a{text-decoration:none;}
.intel-box .btn-solid{background:var(--sig);color:#2a2620;}
.intel-box .btn-ghost2{color:var(--sig);border:1px solid rgba(169,122,53,.45);}

/* ============ 关联信号 ============ */
.others{border-top:1px solid var(--line);padding:7vh 0 3vh;}
.rel-head{display:flex;align-items:baseline;gap:16px;margin-bottom:3.5vh;}
.rel-head .fn,.rel-head .fline{font-family:var(--mono);}
.rel-head .fn{font-size:11px;letter-spacing:.4em;color:var(--sig);white-space:nowrap;}
.rel-head .fline{flex:1;height:1px;background:var(--line);color:transparent;}
.ogrid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;padding-bottom:20px;}
.ocard{
  background:var(--panel);border:1px solid var(--line);border-radius:14px;overflow:hidden;
  display:flex;flex-direction:column;transition:border-color .2s,transform .18s,box-shadow .2s;
}
.ocard:hover{border-color:rgba(169,122,53,.4);transform:translateY(-2px);box-shadow:0 8px 20px rgba(35,37,43,.08);}
.oc-thumb{aspect-ratio:16/7;display:block;overflow:hidden;background:var(--panel2);}
.oc-thumb img{width:100%;height:100%;object-fit:cover;display:block;opacity:.9;transition:opacity .25s,transform .3s;}
.ocard:hover .oc-thumb img{opacity:1;transform:scale(1.02);}
.oc-body{padding:14px 16px 16px;display:flex;flex-direction:column;gap:10px;flex:1;}
.oc-meta{display:flex;justify-content:space-between;align-items:center;gap:8px;}
.oc-cat{font-size:10px;font-family:var(--mono);color:var(--sig);border:1px solid rgba(169,122,53,.4);padding:1px 9px;letter-spacing:.08em;}
.oc-date{font-size:11px;color:var(--faint);font-family:var(--mono);}
.oc-t{font-size:15px;line-height:1.65;color:var(--ink);font-weight:600;}

/* ============ 搜索页 ============ */
.s-title{font-size:clamp(30px,5vw,52px);font-weight:800;margin-top:4.5vh;letter-spacing:-.01em;}
.s-head h1 .dot{color:var(--sig);}
.sform{
  display:flex;gap:12px;align-items:center;margin-top:3.5vh;max-width:680px;
  background:var(--panel);border:1px solid var(--line);border-radius:12px;
  padding:8px 8px 8px 20px;transition:border-color .2s;
}
.sform:focus-within{border-color:rgba(169,122,53,.5);}
.sform svg{color:var(--faint);flex:none;}
.sform input{flex:1;min-width:0;background:transparent;border:none;outline:none;color:var(--ink);font-size:15px;font-family:inherit;}
.sform input::placeholder{color:var(--faint);}
.s-layout{display:flex;gap:28px;align-items:flex-start;margin:4vh auto 8vh;}
.s-main{flex:1;min-width:0;}
.s-count{font-size:12px;color:var(--faint);font-family:var(--mono);margin:2px 0 16px;letter-spacing:.08em;}
.sres{display:flex;flex-direction:column;gap:16px;}
.res-card{display:flex;min-height:150px;background:var(--panel);border:1px solid var(--line);border-radius:14px;overflow:hidden;transition:border-color .2s;}
.res-card:hover{border-color:rgba(169,122,53,.4);}
.res-card .rc-img{width:236px;flex:none;background:var(--panel2);display:block;position:relative;overflow:hidden;}
.res-card .rc-img img{width:100%;height:100%;object-fit:cover;display:block;opacity:.92;transition:opacity .2s,transform .3s;position:absolute;inset:0;}
.res-card:hover .rc-img img{opacity:1;transform:scale(1.03);}
.res-card .rc-img .noimg{display:flex;align-items:center;justify-content:center;height:100%;color:var(--faint);font-size:11px;letter-spacing:4px;}
.res-card .rc-body{flex:1;min-width:0;display:flex;flex-direction:column;gap:8px;padding:16px 20px;}
.rc-meta{display:flex;align-items:center;gap:8px;font-size:11.5px;color:var(--faint);flex-wrap:wrap;font-family:var(--mono);letter-spacing:.05em;}
.rc-cat{color:var(--sig);border:1px solid rgba(169,122,53,.4);border-radius:2px;padding:1px 8px;letter-spacing:.1em;}
.rc-src{color:var(--faint);text-decoration:underline;text-underline-offset:3px;max-width:40%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;display:inline-block;vertical-align:bottom;}
.rc-src:hover{color:var(--sig);}
.rc-t{font-size:17px;font-weight:700;color:var(--ink);line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;transition:color .15s;}
.res-card:hover .rc-t{color:var(--sig);}
.rc-s{font-size:13.5px;color:var(--dim);line-height:1.85;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;margin:0;}
.rc-tags{display:flex;gap:7px;flex-wrap:wrap;margin-top:auto;}
.rc-tags .tag{cursor:pointer;}
.s-empty{border:1px dashed rgba(90,98,121,.5);border-radius:14px;color:var(--faint);text-align:center;padding:44px 0;font-size:14px;}
.s-side{width:250px;flex:none;display:flex;flex-direction:column;gap:16px;}

/* ============ 页脚 ============ */
.foot{border-top:1px solid var(--line);margin-top:6vh;padding:8vh 0 7vh;}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:44px;}
.foot-brand{font-size:17px;letter-spacing:.04em;font-weight:700;}
.foot-brand .dot{color:var(--sig);}
.foot-brand em{display:block;font-style:normal;font-family:var(--mono);font-size:10px;letter-spacing:.3em;color:var(--faint);font-weight:400;margin-top:8px;}
footer .note{margin-top:3vh;font-size:12.5px;line-height:2.1;color:var(--faint);max-width:46em;}
footer .note b{color:var(--dim);font-weight:600;}
.fcol h4{font-family:var(--mono);font-size:10.5px;letter-spacing:.3em;color:var(--faint);font-weight:400;margin-bottom:2.2vh;}
.fcol .links{display:flex;flex-wrap:wrap;gap:10px 18px;font-size:13px;color:var(--dim);}
.fcol .links a:hover{color:var(--sig);}
.foot-bottom{margin-top:6vh;padding-top:3vh;border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;font-family:var(--mono);font-size:10.5px;letter-spacing:.14em;color:var(--faint);}

/* ============ 响应式 ============ */
@media (max-width:980px){
  .s-layout{flex-direction:column;}
  .s-side{width:auto;flex-direction:row;flex-wrap:wrap;}
  .s-side .s-box{flex:1;min-width:200px;}
  .ogrid{grid-template-columns:1fr 1fr;}
}
@media (max-width:760px){
  .art-top .brand em{display:none;}
  .art-top{gap:14px;}
  .topbar .catnav,.art-top .catnav{display:none;}
  .catnav{display:none;}
  .mast-row .catnav{display:none;}
  .masthead{padding:7vh 0 4vh;}
  .masthead h1{font-size:60px;}
  .wrap{padding:0 18px;}
  .card.entry{grid-template-columns:1fr;gap:6px;padding:16px 2px;}
  .card.entry .cat{justify-self:start;}
  .foot-grid{grid-template-columns:1fr;gap:32px;}
  .ogrid{grid-template-columns:1fr;}
  .res-card{flex-direction:column;}
  .res-card .rc-img{width:100%;aspect-ratio:16/6;}
  .res-card .rc-img img{position:static;}
  .ahead{padding-top:5vh;}
  .prose{padding-top:3vh;}
  .wavecap{flex-direction:column;}
}

/* ===== 移动端导航: 汉堡菜单 (在全部断点后, 保证覆盖) ===== */
.burger{display:none;}
.drawer{display:none;}
@media (max-width:860px){
  /* 移动端: 固定顶条常驻 + 汉堡抽屉; 页内 art-top 隐藏避免双 logo */
  .topbar, body.scrolled .topbar{transform:none!important;position:fixed;top:0;left:0;right:0;}
  .topbar .wrap{min-height:52px;}
  .topbar .catnav, .topbar .nav .rss, .topbar .nav .ic-search,
  .mast-row .catnav, .art-top .catnav, .topacts{display:none;}
  .topbar .nav{margin-left:auto;}          /* 汉堡顶到最右 */
  .art-top, .art-top .brand{display:none;} /* 顶条已含 logo, 页内那行收起 */
  .burger{display:inline-flex;flex-direction:column;align-items:center;justify-content:center;gap:5px;
    width:38px;height:38px;margin-left:auto;border:1px solid var(--line);border-radius:10px;
    background:transparent;cursor:pointer;padding:0;flex:none;}
  .burger span{display:block;width:16px;height:1.6px;background:var(--ink);transition:.22s;}
  .burger.on span:nth-child(1){transform:translateY(6.6px) rotate(45deg);background:var(--sig);}
  .burger.on span:nth-child(2){opacity:0;}
  .burger.on span:nth-child(3){transform:translateY(-6.6px) rotate(-45deg);background:var(--sig);}
  .drawer{display:block;visibility:hidden;opacity:0;position:absolute;left:0;right:0;top:100%;
    background:rgba(250,249,244,.98);border-bottom:1px solid var(--line);z-index:96;
    transition:opacity .18s ease,visibility .18s ease;box-shadow:0 24px 40px rgba(35,37,43,.12);}
  .drawer.open{visibility:visible;opacity:1;}
  .drawer-in{padding:4px 24px 22px;}
  .drawer .catnav{display:flex;flex-direction:column;gap:0;}
  .dr-cats a{padding:13px 2px;font-size:15px;color:var(--ink);border-bottom:1px solid var(--line);
    display:flex;justify-content:space-between;align-items:center;font-family:var(--sans);}
  .dr-cats a::after{content:"\2192";color:var(--faint);font-size:12px;}
  .dr-cats a:active{color:var(--sig);}
  .dr-foot{display:flex;gap:24px;padding-top:18px;font-family:var(--mono);font-size:12.5px;color:var(--dim);}
  .dr-foot a:hover{color:var(--sig);}
  /* 固定顶条(52px)让位 */
  .masthead{padding-top:104px;}
  .ahead{padding-top:104px;}
  .s-title{padding-top:92px;}
  /* 内容不贴边: 容器级 padding */
  .wrap{padding-left:24px;padding-right:24px;}
  .prose, .ahead{padding-left:24px;padding-right:24px;}
  .card.entry{padding-left:2px;padding-right:2px;}
  .ahead h1, .prose p, .prose li, .summary p, .hero-story .sum{word-break:break-word;}
}
@media (max-width:380px){
  .brand em{display:none;}
}


/* ============ 行内标记（2026-09-11 衍聿汐加） ============ */
/* 圆角背景：用于模型名/产品名等专有名词 */
.prose .hl{
  background:rgba(169,122,53,.12);border:1px solid rgba(169,122,53,.28);
  border-radius:6px;padding:1px 7px 2px;margin:0 1px;
  color:#7a5a26;font-weight:600;white-space:nowrap;font-size:.94em;
}
/* 点状下划线：用于整句重点（比加粗克制，比白字显眼） */
.prose .dots{
  text-decoration:underline;text-decoration-style:dotted;
  text-decoration-color:rgba(169,122,53,.65);
  text-underline-offset:4px;text-decoration-thickness:2px;
  color:#6f5526;font-weight:600;
}
/* 术语 hover：dotted 下划线 + 悬浮气泡（data-tip） */
.prose .term{
  border-bottom:1px dotted rgba(169,122,53,.65);
  cursor:help;position:relative;
  color:#6f5526;font-weight:600;
  white-space:nowrap;
}
.prose .term::after{
  content:attr(data-tip);
  position:absolute;left:50%;bottom:155%;transform:translateX(-50%) translateY(6px);
  background:#23252b;color:#f2e9d8;font-size:12.5px;line-height:1.75;
  padding:9px 13px;border-radius:8px;width:280px;max-width:72vw;
  opacity:0;pointer-events:none;transition:.16s ease;z-index:60;
  font-weight:400;text-align:left;white-space:normal;
  box-shadow:0 8px 22px rgba(0,0,0,.28);
}
.prose .term:hover::after,.prose .term:focus::after{
  opacity:1;transform:translateX(-50%) translateY(0);
}
@media (hover:none){
  .prose .term::after{bottom:auto;top:145%;transform:translateX(-50%) translateY(-6px);}
  .prose .term:hover::after,.prose .term:focus::after{transform:translateX(-50%) translateY(0);}
}
/* 回到顶部按钮（位于 AI 客服按钮下方） */
#backtop{
  position:fixed;right:20px;bottom:32px;z-index:998;
  width:52px;height:52px;border-radius:50%;
  background:#f4f2ec;border:1px solid rgba(169,122,53,.35);color:#a97a35;
  font-size:18px;line-height:1;display:none;align-items:center;justify-content:center;
  cursor:pointer;transition:border-color .2s,color .2s,transform .15s,box-shadow .18s;
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;
  box-shadow:0 4px 12px rgba(35,37,43,.10),0 0 0 3px rgba(169,122,53,.04);
}
#backtop:hover{border-color:rgba(169,122,53,.75);color:#8a6226;transform:translateY(-2px)}
#backtop:active{transform:scale(.94)}
@media(max-width:560px){#backtop{right:12px;bottom:24px}}