/* How to Live Better · 墨绿 + 米白 */
:root{
  --green:#1e5c45; --green-dark:#143d2e; --green-soft:#e7f0ea;
  --paper:#faf7ef; --card:#ffffff; --ink:#33322e; --muted:#8a8578;
  --line:#e5dfd0; --radius:14px;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0; background:var(--paper); color:var(--ink);
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
  line-height:1.8; font-size:16px;
}
.wrap{max-width:1060px;margin:0 auto;padding:0 18px}
a{color:var(--green)}
.site-header{background:var(--green-dark);color:#fff;position:sticky;top:0;z-index:50}
.site-header .wrap{display:flex;align-items:center;gap:18px;padding:12px 18px;flex-wrap:wrap}
.brand{color:#fff;text-decoration:none;font-weight:700;font-size:17px;white-space:nowrap}
.brand small{display:block;font-size:11px;font-weight:400;color:#cfe3d6;letter-spacing:.1em}
nav.mainnav{display:flex;gap:4px;flex-wrap:wrap;margin-left:auto}
nav.mainnav a{color:#dcebe1;text-decoration:none;font-size:14px;padding:6px 12px;border-radius:999px}
nav.mainnav a:hover{background:rgba(255,255,255,.12)}
nav.mainnav a.active{background:#fff;color:var(--green-dark);font-weight:700}
.hero{background:linear-gradient(160deg,var(--green-dark),var(--green));color:#fff;padding:64px 0 56px;text-align:center}
.hero h1{margin:0 0 10px;font-size:clamp(26px,5vw,40px);line-height:1.4;letter-spacing:.02em}
.hero p.lead{margin:0 auto;max-width:640px;color:#e2efe7;font-size:16px}
.entry-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin:34px 0 8px}
a.entry-card{background:var(--card);border-radius:var(--radius);padding:26px 20px;text-decoration:none;color:var(--ink);
  box-shadow:0 2px 12px rgba(20,61,46,.08);border:1px solid var(--line);display:block;transition:transform .15s}
a.entry-card:hover{transform:translateY(-3px)}
a.entry-card .k{font-size:13px;color:var(--green);font-weight:700;letter-spacing:.08em}
a.entry-card h2{margin:8px 0 6px;font-size:19px;color:var(--green-dark)}
a.entry-card p{margin:0;font-size:14px;color:var(--muted)}
.stats{display:flex;margin:26px 0 10px;background:var(--card);border:1px solid var(--line);
  border-radius:var(--radius);overflow:hidden}
.stat{flex:1;text-align:center;padding:18px 8px;border-left:1px solid var(--line)}
.stat:first-child{border-left:none}
.stat b{display:block;font-size:26px;color:var(--green-dark)}
.stat span{font-size:13px;color:var(--muted)}
.toolbar{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:16px;margin:22px 0}
.search-row{display:flex;gap:10px;flex-wrap:wrap}
.search-row input[type=search]{flex:1;min-width:200px;padding:11px 14px;font-size:15px;border:1px solid var(--line);
  border-radius:10px;background:var(--paper)}
.search-row select{padding:11px 10px;font-size:14px;border:1px solid var(--line);border-radius:10px;background:var(--paper);max-width:100%}
.tag-row{display:flex;gap:8px;flex-wrap:wrap;margin-top:12px;align-items:center}
.tag-row .lbl{font-size:13px;color:var(--muted)}
button.tag{border:1px solid var(--green);background:#fff;color:var(--green);border-radius:999px;
  padding:6px 14px;font-size:13px;cursor:pointer}
button.tag.on{background:var(--green);color:#fff}
.result-meta{font-size:13px;color:var(--muted);margin:14px 2px}
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:14px;padding-bottom:40px}
.tip-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:18px}
.tip-card h3{margin:8px 0 8px;font-size:16.5px;line-height:1.6;color:var(--green-dark)}
.tip-card p{margin:6px 0;font-size:14.5px}
.badge{display:inline-block;background:var(--green-soft);color:var(--green-dark);font-size:12px;font-weight:700;
  padding:2px 10px;border-radius:999px}
.chips{margin-top:4px}
.chip{display:inline-block;font-size:12px;color:var(--muted);border:1px solid var(--line);border-radius:999px;
  padding:1px 9px;margin:2px 4px 2px 0}
.chip.hot{color:var(--green);border-color:var(--green)}
.costline{font-size:13.5px;color:var(--muted);border-top:1px dashed var(--line);padding-top:8px;margin-top:10px}
.tip-card details{margin-top:8px;font-size:14px}
.tip-card summary{cursor:pointer;color:var(--green);font-weight:600;font-size:13.5px}
.tip-card details p{color:var(--ink)}
.article{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:34px 30px;margin:26px 0}
.article h1{font-size:26px;color:var(--green-dark);margin:0 0 6px;line-height:1.5}
.article .sub{color:var(--muted);font-size:13.5px;margin-bottom:18px}
.article h2{font-size:20px;color:var(--green-dark);margin:34px 0 10px;padding-bottom:8px;border-bottom:2px solid var(--green-soft)}
.article h3{font-size:16.5px;color:var(--green);margin:22px 0 8px}
.article p{margin:10px 0}
.article ul{padding-left:22px}
.article li{margin:8px 0}
.kv{display:inline-block;background:var(--green);color:#fff;font-weight:700;border-radius:8px;padding:0 10px;margin-right:6px;font-size:14px}
.callout{background:var(--green-soft);border-left:4px solid var(--green);border-radius:0 10px 10px 0;padding:14px 18px;margin:18px 0;font-size:15px}
.disclaimer{font-size:13.5px;color:var(--muted);background:#f4f1e8;border-radius:10px;padding:14px 18px;margin-top:24px}
.copyright-note{background:#fff8e8;border:1px solid #ead9a8;border-radius:var(--radius);padding:16px 20px;margin:22px 0;font-size:14px}
.safety-list{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:10px 26px;margin:0 0 34px;columns:2;column-gap:36px}
.safety-list li{margin:9px 0;font-size:15px;break-inside:avoid}
.buy-links{display:flex;gap:10px;flex-wrap:wrap;margin:14px 0 30px}
.buy-links a{display:inline-block;background:var(--green);color:#fff;text-decoration:none;border-radius:10px;padding:10px 20px;font-size:14.5px}
footer.site-footer{background:var(--green-dark);color:#cfe3d6;margin-top:20px;padding:30px 0;font-size:13.5px}
footer.site-footer a{color:#fff}
footer.site-footer p{margin:6px 0}
@media (max-width:720px){
  .entry-cards{grid-template-columns:1fr}
  .safety-list{columns:1}
  .article{padding:24px 18px}
  .hero{padding:44px 0 40px}
  .stat b{font-size:21px}
  nav.mainnav{margin-left:0}
}
@media (prefers-reduced-motion:reduce){*{transition:none}}
/* 知识图谱 */
.graph-band{background:#0b1116;color:#dbe4ec;padding:46px 0 54px;margin:0}
.graph-band h2{color:#fff;margin:0 0 6px;font-size:24px}
.graph-lead{color:#9fb0c0;font-size:14.5px;margin:0 0 16px}
.graph-bar{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin-bottom:14px}
.graph-bar input[type=search]{flex:1;min-width:220px;max-width:420px;padding:10px 14px;font-size:14.5px;
  border:1px solid #2a3642;border-radius:10px;background:#141c24;color:#e8edf3}
.graph-bar button{padding:10px 22px;font-size:14.5px;border:none;border-radius:10px;background:var(--green);
  color:#fff;cursor:pointer;font-weight:600}
#graph-search-msg{font-size:13px;color:#e8b34b}
.graph-wrap{display:flex;gap:14px;align-items:stretch}
#graph-canvas{flex:1;min-width:0;height:520px;border-radius:var(--radius);border:1px solid #22303d;
  cursor:grab;touch-action:none;background:#0e141b}
#graph-side{width:300px;flex-shrink:0;background:#141c24;border:1px solid #22303d;border-radius:var(--radius);
  padding:18px;display:none;max-height:520px;overflow-y:auto}
#graph-side.open{display:block}
#graph-side h3{margin:0 0 2px;color:#9d8df1;font-size:18px}
#graph-side .side-sub{font-size:12.5px;color:#9fb0c0;margin:0 0 12px}
.side-book{display:block;background:#1a232e;border:1px solid #2a3642;border-radius:10px;padding:12px 14px;
  margin-bottom:10px;text-decoration:none;color:#dbe4ec}
.side-book:hover{border-color:#e8b34b}
.side-book b{display:block;color:#fff;font-size:14.5px}
.side-book span{font-size:12.5px;color:#e8b34b}
.side-book p{font-size:13px;color:#9fb0c0;margin:6px 0 0}
@media (max-width:860px){
  .graph-wrap{flex-direction:column}
  #graph-canvas{height:420px}
  #graph-side{width:auto;max-height:300px}
}

/* Key takeaways (GEO citable blocks) */
.takeaways{padding:26px 0}
.takeaways h2{margin:0 0 4px}
.qa{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:16px 18px;margin:12px 0}
.qa h3{margin:0 0 8px;font-size:16px;color:var(--green-dark)}
.qa p{margin:0;font-size:14.5px;line-height:1.65}

/* Blurred brain backdrop for the knowledge graph */
.graph-wrap{position:relative;overflow:hidden;border-radius:var(--radius)}
.graph-bg{position:absolute;inset:0;background:url('assets/img/brain-bg.jpg') center/cover no-repeat;
  filter:blur(16px) brightness(.85);opacity:.6;pointer-events:none}
#graph-canvas{position:relative;z-index:1}
/* Page hero illustrations */
.page-hero{display:block;width:100%;max-height:340px;object-fit:cover;
  border-radius:var(--radius);margin:18px 0}