:root{
  --bg:#f6f4ef; --panel:#ffffff; --ink:#1f2328; --muted:#6b7280; --line:#e6e1d6;
  --accent:#9a3b2e; --accent2:#2f5b8f; --pro:#2e7d52; --con:#b5742a;
  --maxw:860px; --serif:"Iowan Old Style","Source Serif Pro",Georgia,"Songti SC","Noto Serif SC",serif;
  --sans:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Noto Sans SC",sans-serif;
}
*{box-sizing:border-box}
html,body{margin:0}
body{background:var(--bg);color:var(--ink);font-family:var(--sans);line-height:1.7;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}

/* language switch */
body[data-lang="zh"] .en{display:none!important}
body[data-lang="en"] .zh{display:none!important}

a{color:var(--accent2);text-decoration:none}
a:hover{text-decoration:underline}

/* header */
.site-head{position:sticky;top:0;z-index:40;display:flex;align-items:center;justify-content:space-between;
  gap:16px;padding:10px 22px;background:rgba(246,244,239,.86);backdrop-filter:saturate(1.4) blur(10px);
  border-bottom:1px solid var(--line)}
.brand{display:flex;align-items:center;gap:10px;color:var(--ink)}
.brand:hover{text-decoration:none}
.brand-mark{display:inline-grid;place-items:center;width:30px;height:30px;border-radius:7px;
  background:var(--accent);color:#fff;font-weight:800;font-size:13px;letter-spacing:.5px}
.brand-txt{font-weight:700;font-size:14px}
.head-right{display:flex;align-items:center;gap:14px}
.back{font-size:13px;color:var(--muted)}
.lang-toggle{cursor:pointer;border:1px solid var(--line);background:var(--panel);border-radius:999px;
  padding:5px 12px;font-size:12.5px;font-weight:700;color:var(--muted);display:flex;gap:5px;align-items:center}
.lang-toggle:hover{border-color:var(--accent)}
body[data-lang="zh"] .lang-toggle .lt-zh{color:var(--accent)}
body[data-lang="en"] .lang-toggle .lt-en{color:var(--accent)}
.lt-sep{opacity:.4}

/* hero */
.hero{background:linear-gradient(180deg,#fbfaf6,transparent);border-bottom:1px solid var(--line)}
.hero-inner{max-width:var(--maxw);margin:0 auto;padding:42px 22px 30px}
.hero-tags{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:14px}
.badge-n{background:var(--accent);color:#fff;font-weight:800;border-radius:6px;padding:3px 9px;font-size:12.5px}
.badge-seq{background:#efe9dc;color:#7a6a4f;border-radius:6px;padding:3px 9px;font-size:12.5px;font-weight:600}
.badge-meta{color:var(--muted);font-size:12.5px;padding:3px 0}
.hero h1{font-family:var(--serif);font-size:40px;line-height:1.15;margin:.1em 0 .25em;letter-spacing:-.01em}
.tagline{font-size:18px;color:#4b5158;margin:.2em 0 .7em;font-family:var(--serif);font-style:italic}
.byline{color:var(--muted);font-size:13.5px;margin:0}

/* section nav */
.secnav{position:sticky;top:51px;z-index:30;background:rgba(246,244,239,.9);backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line)}
.secnav-inner{max-width:var(--maxw);margin:0 auto;padding:0 22px;display:flex;gap:4px;overflow-x:auto}
.secnav a{padding:11px 12px;font-size:13px;color:var(--muted);white-space:nowrap;border-bottom:2px solid transparent}
.secnav a:hover{color:var(--accent);text-decoration:none}
.secnav a.active{color:var(--ink);border-bottom-color:var(--accent);font-weight:600}

/* main */
.wrap{max-width:var(--maxw);margin:0 auto;padding:10px 22px 60px}
.sec{padding:34px 0;border-bottom:1px solid var(--line)}
.sec:last-child{border-bottom:none}
.sec-head{display:flex;align-items:baseline;gap:12px;margin-bottom:14px}
.sec-num{font-family:var(--serif);font-size:14px;color:var(--accent);font-weight:700;letter-spacing:.1em;
  border:1px solid var(--accent);border-radius:6px;padding:2px 7px;flex:none}
.sec-head h2{font-family:var(--serif);font-size:25px;margin:0;letter-spacing:-.01em}
.sec-body{font-size:17px}
.sec-body p{margin:.7em 0}
.sec-body h3{font-family:var(--serif);font-size:20px;margin:1.2em 0 .4em}
.sec-body h4{font-size:16px;margin:1em 0 .3em}
.sec-body ul,.sec-body ol{padding-left:1.3em}
.sec-body li{margin:.35em 0}
.sec-body blockquote{margin:1em 0;padding:.4em 1.1em;border-left:3px solid var(--accent);
  background:#fbf8f2;color:#444;font-style:italic;border-radius:0 8px 8px 0}
.sec-body code{background:#efece4;border-radius:4px;padding:.1em .35em;font-size:.9em}
.sec-body pre{background:#2b2b2b;color:#eee;padding:14px 16px;border-radius:10px;overflow:auto}
.sec-body pre code{background:none;color:inherit;padding:0}
.sec-body img{max-width:100%;height:auto;border-radius:8px;margin:.6em 0}
.sec-body hr{border:none;border-top:1px solid var(--line);margin:1.6em 0}

/* infographic */
.sec-info .sec-body{font-size:16px}
.stat-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:14px;margin:6px 0 22px}
.stat{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:18px 16px;text-align:center}
.stat-val{font-family:var(--serif);font-size:30px;font-weight:800;color:var(--accent);line-height:1.1}
.stat-lbl{font-size:13px;color:var(--muted);margin-top:6px}
.ig-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:14px;margin:6px 0 22px}
.ig-card{display:flex;gap:12px;background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:16px}
.ig-icon{font-size:24px;line-height:1;flex:none}
.ig-body h4{margin:0 0 .25em;font-size:15.5px}
.ig-body p{margin:0;font-size:14px;color:#52585f;line-height:1.55}
.flow{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:20px 20px 8px}
.flow-title{font-weight:700;font-size:14px;color:var(--muted);margin-bottom:12px;text-transform:uppercase;letter-spacing:.06em}
.flow-step{display:flex;gap:14px;padding:0 0 14px;position:relative}
.flow-step:not(:last-child)::before{content:"";position:absolute;left:13px;top:28px;bottom:0;width:2px;background:var(--line)}
.flow-num{flex:none;width:28px;height:28px;border-radius:50%;background:var(--accent);color:#fff;
  display:grid;place-items:center;font-weight:700;font-size:13px;z-index:1}
.flow-txt{font-size:15px;padding-top:3px}

/* faq */
.faq-item{border:1px solid var(--line);border-radius:12px;margin:10px 0;background:var(--panel);overflow:hidden}
.faq-item summary{cursor:pointer;padding:15px 18px;font-weight:600;font-size:16px;list-style:none;
  display:flex;justify-content:space-between;align-items:center;gap:12px}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";color:var(--accent);font-size:22px;font-weight:400;flex:none}
.faq-item[open] summary::after{content:"–"}
.faq-item[open] summary{border-bottom:1px solid var(--line)}
.faq-a{padding:6px 18px 16px;font-size:15.5px;color:#41464c}
.faq-a p:first-child{margin-top:.6em}

/* analysis */
.an-intro{font-size:17px;margin-bottom:18px}
.pa-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.pa-col{border:1px solid var(--line);border-radius:14px;padding:6px 18px 14px;background:var(--panel)}
.pa-col-h{display:flex;align-items:center;gap:8px;font-weight:700;font-size:16px;padding:14px 0 6px;
  border-bottom:1px solid var(--line);margin-bottom:6px}
.pa-ic{display:inline-grid;place-items:center;width:22px;height:22px;border-radius:50%;color:#fff;font-size:13px}
.pa-pro .pa-ic{background:var(--pro)} .pa-con .pa-ic{background:var(--con)}
.pa-pro .pa-col-h{color:var(--pro)} .pa-con .pa-col-h{color:var(--con)}
.pa-col ul{list-style:none;padding:0;margin:0}
.pa-col li{padding:11px 0;border-bottom:1px dashed var(--line)}
.pa-col li:last-child{border-bottom:none}
.pa-h{font-weight:650;font-size:15.5px;margin-bottom:2px}
.pa-d{font-size:14px;color:#52585f;line-height:1.55}
.verdict{margin-top:18px;background:#fbf8f2;border:1px solid var(--line);border-left:4px solid var(--accent);
  border-radius:0 12px 12px 0;padding:14px 18px}
.verdict-tag{font-size:12px;font-weight:800;text-transform:uppercase;letter-spacing:.08em;color:var(--accent);margin-bottom:4px}
.verdict p{margin:0;font-size:16px}

/* original */
.sec-original .orig{font-family:var(--serif);font-size:18px;line-height:1.78}
.sec-original .orig p{margin:1em 0}
.orig-meta{margin-bottom:16px}
.orig-link{display:inline-block;background:var(--panel);border:1px solid var(--line);border-radius:999px;
  padding:7px 16px;font-size:14px;font-weight:600}
.orig-link:hover{border-color:var(--accent);text-decoration:none}

.todo{color:var(--muted);font-style:italic}

/* prev / next */
.pn{max-width:var(--maxw);margin:0 auto;padding:24px 22px 10px;display:grid;grid-template-columns:1fr 1fr;gap:14px}
.pn a{display:block;background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:14px 18px}
.pn a:hover{border-color:var(--accent);text-decoration:none}
.pn-next{text-align:right}
.pn-rel{display:block;font-size:12px;color:var(--muted);text-transform:uppercase;letter-spacing:.06em}
.pn-t{font-family:var(--serif);font-size:16px;color:var(--ink)}
.pn-empty{display:block}

/* footer */
.site-foot{max-width:var(--maxw);margin:0 auto;padding:30px 22px 60px;color:var(--muted);font-size:13px;
  border-top:1px solid var(--line);text-align:center}
.site-foot a{font-size:14px;display:inline-block;margin-top:8px}

/* index */
.index-hero{max-width:980px;margin:0 auto;padding:54px 22px 26px;text-align:center}
.index-hero h1{font-family:var(--serif);font-size:46px;margin:.1em 0 .3em;letter-spacing:-.015em}
.lead{font-size:17px;color:#4b5158;max-width:720px;margin:.5em auto}
.lead-credit{color:var(--muted);font-size:14px;margin-top:10px}
.index-wrap{max-width:980px;margin:0 auto;padding:14px 22px 40px}
.seq-group{margin:30px 0}
.seq-h{font-family:var(--serif);font-size:15px;text-transform:uppercase;letter-spacing:.1em;color:var(--accent);
  border-bottom:2px solid var(--line);padding-bottom:8px;margin:0 0 16px}
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:14px}
.card{display:flex;align-items:center;gap:14px;background:var(--panel);border:1px solid var(--line);
  border-radius:14px;padding:16px 16px;color:var(--ink);transition:transform .12s,border-color .12s,box-shadow .12s}
.card:hover{text-decoration:none;border-color:var(--accent);transform:translateY(-2px);
  box-shadow:0 8px 24px rgba(154,59,46,.08)}
.card-n{font-family:var(--serif);font-weight:800;color:var(--accent);font-size:18px;flex:none;width:42px}
.card-titles{flex:1;min-width:0}
.card-t{font-weight:650;font-size:16px;line-height:1.3}
.card-tag{font-size:13px;color:var(--muted);margin-top:3px;line-height:1.4}
.card-arrow{color:var(--muted);font-size:18px;flex:none}
.card:hover .card-arrow{color:var(--accent)}
.card-pending{opacity:.55}

@media(max-width:680px){
  .hero h1{font-size:30px}.index-hero h1{font-size:32px}
  .pa-grid{grid-template-columns:1fr}.pn{grid-template-columns:1fr}
  .pn-next{text-align:left}.sec-head h2{font-size:21px}
  .brand-txt{display:none}
}