/* roulang page: index */
:root{
  --primary:#E8541F;
  --primary-dark:#C23F0E;
  --primary-light:#FDEDE6;
  --ink:#221F2A;
  --ink-deep:#17161B;
  --jade:#12897A;
  --warn:#B3261E;
  --bg:#FAF7F3;
  --card:#FFFFFF;
  --line:#EAE4DC;
  --text:#2B2733;
  --muted:#6B6572;
  --disabled:#A9A2AE;
  --r-sm:8px;
  --r-md:12px;
  --r:14px;
  --r-lg:18px;
  --shadow-1:0 1px 2px rgba(34,31,42,.05),0 8px 24px rgba(34,31,42,.06);
  --shadow-2:0 12px 30px rgba(34,31,42,.12);
  --font-cn:system-ui,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",sans-serif;
  --font-num:"DIN Alternate","Barlow",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --sec:56px;
}
@media (min-width:768px){ :root{ --sec:80px; } }
@media (min-width:1024px){ :root{ --sec:104px; } }

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.85;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;border-radius:10px;}
a{color:var(--primary);text-decoration:none;transition:color .2s ease,background-color .2s ease;}
a:hover{color:var(--primary-dark);}
h1,h2,h3,h4,p,figure,blockquote{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
button,input,select,textarea{font-family:inherit;font-size:inherit;color:inherit;line-height:1.5;}
button{cursor:pointer;border:none;background:none;}
:focus-visible{outline:2px solid rgba(232,84,31,.45);outline-offset:2px;}
.mono{font-family:var(--font-num);font-variant-numeric:tabular-nums;}

.wrap{width:100%;max-width:1200px;margin:0 auto;padding-left:20px;padding-right:20px;}
@media (min-width:1024px){ .wrap{padding-left:32px;padding-right:32px;} }

.section{padding:var(--sec) 0;}
.section--tight{padding-top:0;}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap;margin-bottom:32px;}
.section-head h2{font-size:clamp(24px,2.8vw,34px);line-height:1.3;font-weight:700;color:var(--ink);letter-spacing:0;}
.section-head .sub{margin-top:8px;font-size:14px;line-height:1.7;color:var(--muted);max-width:640px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;font-weight:600;line-height:1;letter-spacing:0;
  color:var(--primary-dark);background:var(--primary-light);
  border-radius:999px;padding:8px 14px;margin-bottom:16px;
}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--primary);}

/* ===== Buttons ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 28px;border-radius:var(--r-sm);
  font-size:15px;font-weight:600;line-height:1;white-space:nowrap;
  border:1.5px solid transparent;min-height:44px;
  transition:background-color .22s ease,color .22s ease,transform .18s ease,border-color .22s ease,box-shadow .22s ease;
}
.btn-primary{background:var(--primary);color:#fff;}
.btn-primary:hover{background:var(--primary-dark);color:#fff;transform:translateY(-1px);}
.btn-primary:active{transform:translateY(1px);}
.btn-ghost{background:transparent;border-color:var(--primary);color:var(--primary);}
.btn-ghost:hover{background:var(--primary-light);color:var(--primary-dark);border-color:var(--primary-dark);}
.btn-sm{height:40px;padding:0 18px;font-size:14px;}
.btn-block{width:100%;}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--primary);}
.link-arrow:hover{color:var(--primary-dark);text-decoration:underline;text-underline-offset:3px;}

/* ===== Header / Nav ===== */
.site-header{
  position:sticky;top:0;z-index:80;background:#fff;
  border-bottom:1px solid var(--line);transition:box-shadow .25s ease;
}
.site-header.is-scrolled{box-shadow:0 1px 8px rgba(34,31,42,.08);}
.nav-wrap{
  max-width:1200px;margin:0 auto;padding:0 20px;height:72px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
}
@media (min-width:1024px){ .nav-wrap{padding:0 32px;} }
.nav-left,.nav-right{display:flex;align-items:center;gap:6px;flex:1 1 0;min-width:0;}
.nav-right{justify-content:flex-end;}
.nav-left a,.nav-link{
  position:relative;display:inline-flex;align-items:center;height:72px;
  padding:0 12px;font-size:15px;font-weight:500;color:var(--ink);
}
.nav-left a::after,.nav-link::after{
  content:"";position:absolute;left:12px;right:12px;bottom:20px;height:2px;
  background:var(--primary);transform:scaleX(0);transform-origin:center;transition:transform .22s ease;
}
.nav-left a:hover,.nav-link:hover{color:var(--primary);}
.nav-left a:hover::after,.nav-link:hover::after,.nav-left a.is-active::after,.nav-link.is-active::after{transform:scaleX(1);}
.nav-left a.is-active,.nav-link.is-active{color:var(--primary);font-weight:600;}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand-mark{
  width:28px;height:28px;border-radius:8px;background:var(--primary-light);
  display:inline-flex;align-items:center;justify-content:center;color:var(--primary);
}
.brand-text{font-size:20px;font-weight:700;color:var(--ink);letter-spacing:0;white-space:nowrap;}
.brand:hover .brand-text{color:var(--primary-dark);}
.nav-cta{margin-left:8px;}
.nav-toggle{
  display:none;align-items:center;justify-content:center;
  width:44px;height:44px;border-radius:var(--r-sm);color:var(--ink);
  border:1px solid var(--line);background:#fff;
}
.nav-toggle:hover{border-color:var(--primary);color:var(--primary);}
.mobile-panel{
  display:none;position:fixed;left:0;right:0;top:72px;bottom:0;z-index:79;
  background:var(--ink);padding:16px 0 96px;overflow-y:auto;
}
.mobile-panel.is-open{display:block;}
.mobile-panel a{
  display:flex;align-items:center;justify-content:space-between;
  height:52px;padding:0 24px;color:rgba(255,255,255,.9);font-size:16px;
  border-bottom:1px solid rgba(255,255,255,.08);
}
.mobile-panel a:hover{background:rgba(255,255,255,.06);color:#fff;}
.mobile-panel .arrow{color:var(--primary);font-size:18px;}
.mobile-cta{position:fixed;left:20px;right:20px;bottom:24px;width:auto;}
@media (max-width:1023px){
  .nav-left,.nav-right{display:none;}
  .nav-toggle{display:inline-flex;}
  .nav-wrap{justify-content:space-between;}
  .brand-text{font-size:17px;}
}

/* ===== Hero ===== */
.hero{position:relative;background:var(--bg);padding:56px 0 64px;overflow:hidden;}
@media (min-width:1024px){ .hero{padding:88px 0 96px;} }
.hero::before{
  content:"";position:absolute;top:0;right:0;width:48%;height:100%;
  background-image:repeating-linear-gradient(135deg,rgba(232,84,31,.06) 0 1px,transparent 1px 16px);
  pointer-events:none;
}
.hero-grid{position:relative;z-index:1;}
.hero h1{
  font-size:clamp(30px,4.2vw,50px);line-height:1.28;font-weight:700;
  color:var(--ink);letter-spacing:0;max-width:14em;
}
.hero-sub{margin-top:20px;font-size:16px;line-height:1.85;color:var(--muted);max-width:34em;}
.hero-actions{display:flex;flex-wrap:wrap;gap:16px;margin-top:32px;}
.hero-stats{display:flex;flex-wrap:wrap;gap:32px;margin-top:40px;padding-top:24px;border-top:1px solid var(--line);}
.hero-stat .num{font-family:var(--font-num);font-size:24px;font-weight:700;color:var(--ink);line-height:1.2;}
.hero-stat .num span{font-size:13px;font-weight:500;color:var(--muted);margin-left:4px;}
.hero-stat .lb{font-size:14px;color:var(--muted);margin-top:4px;}
.hero-media{position:relative;margin-top:40px;}
@media (min-width:1024px){ .hero-media{margin-top:0;} }
.hero-media img{
  width:100%;border-radius:var(--r-lg);border:1px solid var(--line);
  box-shadow:var(--shadow-1);aspect-ratio:4/3;object-fit:cover;
}
.hero-badge{
  position:absolute;left:16px;bottom:-16px;background:#fff;border:1px solid var(--line);
  border-radius:var(--r);padding:14px 18px;box-shadow:var(--shadow-1);
  display:flex;flex-direction:column;gap:2px;
}
.hero-badge .hb-num{font-family:var(--font-num);font-size:22px;font-weight:700;color:var(--jade);line-height:1.2;}
.hero-badge .hb-label{font-size:13px;color:var(--muted);}

/* ===== Metrics ===== */
.metric-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r);
  padding:24px;box-shadow:var(--shadow-1);height:100%;
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.metric-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);border-color:#dfd7cc;}
.metric-value{font-family:var(--font-num);font-size:40px;line-height:1.1;font-weight:700;color:var(--ink);}
.metric-value span{font-size:14px;font-weight:500;color:var(--muted);margin-left:4px;}
.metric-label{font-size:14px;color:var(--muted);margin-top:8px;}
.metric-foot{
  margin-top:16px;padding-top:14px;border-top:1px solid var(--line);
  font-size:13px;color:var(--muted);display:flex;align-items:center;gap:8px;
}
.tri{width:0;height:0;flex:0 0 auto;}
.tri-up{border-left:5px solid transparent;border-right:5px solid transparent;border-bottom:8px solid var(--jade);}
.tri-down{border-left:5px solid transparent;border-right:5px solid transparent;border-top:8px solid var(--warn);}
.metric-card + .metric-card{margin-top:0;}

/* ===== Matrix ===== */
.matrix-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r);
  padding:24px;height:100%;display:flex;flex-direction:column;gap:12px;
  box-shadow:var(--shadow-1);transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.matrix-card:hover{transform:translateY(-2px);border-color:var(--primary-light);box-shadow:var(--shadow-2);}
.matrix-card h3{font-size:18px;line-height:1.4;font-weight:600;color:var(--ink);}
.matrix-card p{font-size:14px;line-height:1.75;color:var(--muted);}
.matrix-card .link-arrow{margin-top:auto;padding-top:8px;}
.icon-32{width:32px;height:32px;color:var(--primary);}
.matrix-feature{
  position:relative;border-radius:var(--r-lg);overflow:hidden;height:100%;
  min-height:320px;display:flex;flex-direction:column;justify-content:flex-end;
  padding:28px;color:#fff;border:1px solid var(--line);
  background-image:linear-gradient(180deg,rgba(23,22,27,.25) 0%,rgba(23,22,27,.86) 72%),url("/assets/images/backpic/back-2.webp");
  background-size:cover;background-position:center;
}
.matrix-feature h3{font-size:22px;line-height:1.4;font-weight:700;color:#fff;}
.matrix-feature p{margin-top:12px;font-size:14px;line-height:1.75;color:rgba(255,255,255,.85);max-width:32em;}
.matrix-feature .link-arrow{margin-top:20px;color:#fff;}
.matrix-feature .link-arrow:hover{color:var(--primary-light);}
.matrix-note{
  background:var(--primary-light);border:1px solid #f6d9cb;border-radius:var(--r);
  padding:24px;height:100%;display:flex;flex-direction:column;gap:12px;justify-content:center;
}
.matrix-note h3{font-size:18px;font-weight:600;line-height:1.4;color:var(--ink);}
.matrix-note p{font-size:14px;line-height:1.75;color:var(--primary-dark);}

/* ===== Compare ===== */
.compare-wrap{position:relative;background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--shadow-1);}
.compare-col{padding:32px 28px;}
.compare-col + .compare-col{border-left:1px solid var(--line);}
@media (max-width:1023px){
  .compare-col + .compare-col{border-left:none;border-top:1px solid var(--line);}
}
.compare-col h3{font-size:20px;font-weight:700;color:var(--ink);}
.compare-col .tagline{font-size:14px;color:var(--muted);margin-top:8px;}
.compare-list{margin-top:24px;}
.compare-row{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:14px 0;border-bottom:1px dashed var(--line);}
.compare-row:last-child{border-bottom:none;}
.compare-row .dim{font-size:14px;color:var(--muted);}
.compare-row .val{font-family:var(--font-num);font-size:15px;font-weight:600;}
.val-good{color:var(--jade);}
.val-bad{color:var(--warn);}
.compare-col.is-best{background:#fffdfb;}

/* ===== News ===== */
.news-lead{
  display:block;background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);
  overflow:hidden;box-shadow:var(--shadow-1);transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.news-lead:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);border-color:var(--primary-light);}
.news-lead img{width:100%;height:100%;aspect-ratio:16/10;object-fit:cover;border-radius:0;}
.news-lead-body{padding:28px;}
.news-lead h3{font-size:20px;line-height:1.45;font-weight:600;color:var(--ink);margin-top:12px;}
.news-lead:hover h3{color:var(--primary-dark);}
.news-lead p{margin-top:12px;font-size:14px;line-height:1.75;color:var(--muted);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-meta{display:flex;align-items:center;gap:12px;margin-top:16px;font-size:13px;color:var(--muted);}
.badge{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:999px;
  font-size:12px;font-weight:600;line-height:1;background:var(--primary-light);color:var(--primary-dark);
}
.badge-jade{background:#E4F3F0;color:#0d6a5e;}
.news-row{
  display:flex;gap:16px;align-items:flex-start;background:var(--card);
  border:1px solid var(--line);border-radius:var(--r);padding:16px;
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.news-row:hover{transform:translateY(-2px);border-color:var(--primary-light);box-shadow:var(--shadow-1);}
.news-row img{width:64px;height:64px;flex:0 0 64px;object-fit:cover;border-radius:10px;}
.news-row h4{font-size:16px;line-height:1.5;font-weight:600;color:var(--ink);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-row:hover h4{color:var(--primary-dark);}
.news-row p{margin-top:6px;font-size:13px;color:var(--muted);display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden;}
.news-row .news-meta{margin-top:8px;font-size:12px;}
.empty-state{
  background:var(--card);border:1px dashed var(--line);border-radius:var(--r-lg);
  padding:56px 24px;text-align:center;
}
.empty-state svg{width:56px;height:56px;color:var(--disabled);margin:0 auto 16px;}
.empty-state p{font-size:14px;color:var(--muted);margin-bottom:20px;}

/* ===== FAQ ===== */
.faq-list .accordion{margin:0;background:transparent;}
.faq-list .accordion-item{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
  margin-bottom:12px;overflow:hidden;position:relative;transition:border-color .2s ease;
}
.faq-list .accordion-item:hover{border-color:#dfd7cc;}
.faq-list .accordion-item.is-active{border-color:var(--primary);}
.faq-list .accordion-item.is-active::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--primary);
}
.faq-list .accordion-title{
  display:block;position:relative;background:#fff;border:none;
  padding:18px 56px 18px 20px;font-size:17px;font-weight:600;line-height:1.5;color:var(--ink);
}
.faq-list .accordion-title:hover{color:var(--primary-dark);background:#fff;}
.faq-list .accordion-title::after{
  content:"";position:absolute;right:22px;top:50%;width:14px;height:2px;
  background:var(--primary);transform:translateY(-50%);
}
.faq-list .accordion-title::before{
  content:"";position:absolute;right:28px;top:50%;width:2px;height:14px;
  background:var(--primary);transform:translateY(-50%);transition:transform .2s ease;
}
.faq-list .accordion-item.is-active .accordion-title::before{transform:translateY(-50%) scaleY(0);}
.faq-list .accordion-content{
  border:none;border-top:1px solid var(--line);background:#fff;
  padding:16px 20px 20px;color:var(--muted);font-size:15px;line-height:1.8;
}
.faq-list .accordion-content p + p{margin-top:10px;}

/* ===== Lead form ===== */
.lead-band{background:var(--ink-deep);padding:var(--sec) 0;}
.lead-band h2{font-size:clamp(24px,2.8vw,34px);line-height:1.3;font-weight:700;color:#fff;}
.lead-band .lead-desc{margin-top:16px;font-size:15px;line-height:1.8;color:rgba(255,255,255,.78);max-width:34em;}
.lead-points{margin-top:28px;display:flex;flex-direction:column;gap:14px;}
.lead-points li{display:flex;gap:12px;align-items:flex-start;font-size:14px;color:rgba(255,255,255,.85);line-height:1.7;}
.lead-points svg{width:20px;height:20px;flex:0 0 20px;color:var(--primary);margin-top:3px;}
.form-card{
  background:#fff;border-radius:var(--r-lg);padding:32px;box-shadow:var(--shadow-2);
}
@media (min-width:1024px){ .form-card{margin-top:-24px;} }
.form-row{margin-bottom:18px;}
.form-row label{display:block;font-size:14px;color:var(--muted);margin-bottom:8px;}
.form-row input[type="text"],
.form-row input[type="tel"],
.form-row select,
.form-row textarea{
  width:100%;height:48px;padding:0 14px;border:1px solid var(--line);
  border-radius:var(--r-sm);background:#fff;color:var(--text);
  transition:border-color .2s ease,box-shadow .2s ease;margin:0;
}
.form-row textarea{height:auto;min-height:110px;padding:12px 14px;resize:vertical;line-height:1.7;}
.form-row input:focus,.form-row select:focus,.form-row textarea:focus{
  outline:none;border-color:var(--primary);box-shadow:0 0 0 2px var(--primary-light);
}
.form-check{display:flex;gap:10px;align-items:flex-start;font-size:13px;color:var(--muted);line-height:1.7;margin:4px 0 20px;}
.form-check input{width:16px;height:16px;margin:4px 0 0;flex:0 0 16px;accent-color:var(--primary);}
.form-error{color:var(--warn);font-size:13px;margin-top:6px;display:none;}
.form-row.has-error input,.form-row.has-error select{border-color:var(--warn);}
.form-row.has-error .form-error{display:block;}
.form-result{
  display:none;margin-top:18px;padding:16px;border-radius:var(--r-sm);
  background:#E4F3F0;color:#0d6a5e;font-size:14px;line-height:1.7;
}
.form-result.is-visible{display:block;}

/* ===== Footer ===== */
.site-footer{background:var(--ink-deep);color:rgba(255,255,255,.85);padding:64px 0 0;}
.footer-grid{display:flex;flex-wrap:wrap;gap:40px;}
.footer-col{flex:1 1 200px;min-width:180px;}
.footer-brand{flex:1 1 300px;max-width:360px;}
.footer-title{font-size:14px;font-weight:600;color:#fff;margin-bottom:18px;}
.footer-brand .brand-text{color:#fff;}
.footer-brand .brand-mark{background:rgba(232,84,31,.16);color:var(--primary);}
.footer-brand p{margin-top:16px;font-size:14px;line-height:1.8;color:rgba(255,255,255,.7);}
.footer-links li{margin-bottom:12px;}
.footer-links a{font-size:14px;color:rgba(255,255,255,.78);}
.footer-links a:hover{color:var(--primary);text-decoration:underline;text-underline-offset:3px;}
.footer-contact li{font-size:14px;line-height:1.8;color:rgba(255,255,255,.78);margin-bottom:10px;}
.footer-contact .mono{color:#fff;}
.footer-bottom{
  margin-top:56px;border-top:1px solid rgba(255,255,255,.1);
  padding:20px 0;display:flex;flex-wrap:wrap;align-items:center;
  justify-content:space-between;gap:12px;font-size:13px;color:rgba(255,255,255,.6);
}
.to-top{display:inline-flex;align-items:center;gap:6px;color:rgba(255,255,255,.8);}
.to-top:hover{color:var(--primary);}

@media (max-width:639px){
  .section-head{flex-direction:column;align-items:flex-start;}
  .hero-stats{gap:24px;}
  .form-card{padding:24px;}
  .footer-grid{gap:32px;}
}

/* roulang page: article */
:root{
  --brand:#E8541F;
  --brand-dark:#C23F0E;
  --brand-soft:#FDEDE6;
  --ink:#221F2A;
  --ink-deep:#17161B;
  --jade:#12897A;
  --warn:#B3261E;
  --bg:#FAF7F3;
  --card:#FFFFFF;
  --line:#EAE4DC;
  --text:#2B2733;
  --muted:#6B6572;
  --disabled:#A9A2AE;
  --r-card:14px;
  --r-card-lg:18px;
  --r-btn:8px;
  --r-img:10px;
  --sh-1:0 1px 2px rgba(34,31,42,.05), 0 8px 24px rgba(34,31,42,.06);
  --sh-2:0 12px 30px rgba(34,31,42,.12);
  --sect:56px;
  --mono:"DIN Alternate","Barlow",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
@media (min-width:640px){ :root{ --sect:80px; } }
@media (min-width:1024px){ :root{ --sect:104px; } }

*,*::before,*::after{ box-sizing:border-box; }
html{ -webkit-text-size-adjust:100%; scroll-behavior:smooth; }
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:system-ui,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;padding:0;}
ul,ol{list-style:none;}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;transition:color .18s ease,background-color .18s ease,border-color .18s ease;}
button{font:inherit;cursor:pointer;border:0;background:none;color:inherit;}
input,select,textarea{font:inherit;}
h1{font-size:clamp(30px,4.2vw,50px);line-height:1.28;font-weight:700;color:var(--ink);letter-spacing:0;}
h2{font-size:clamp(24px,2.8vw,34px);line-height:1.3;font-weight:700;color:var(--ink);letter-spacing:0;}
h3{font-size:20px;line-height:1.4;font-weight:600;color:var(--ink);}
p{line-height:1.85;}
:focus-visible{outline:2px solid rgba(232,84,31,.45);outline-offset:2px;}

.wrap{width:100%;max-width:1200px;margin:0 auto;padding:0 20px;}
@media (min-width:1024px){ .wrap{ padding:0 32px; } }
.mono{font-family:var(--mono);}
.section{padding:var(--sect) 0 0;}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:48px;padding:0 28px;border-radius:var(--r-btn);
  font-size:16px;font-weight:600;white-space:nowrap;
  transition:transform .18s ease,background-color .18s ease,color .18s ease,border-color .18s ease,box-shadow .18s ease;
}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 6px 18px rgba(232,84,31,.22);}
.btn-primary:hover{background:var(--brand-dark);transform:translateY(-1px);color:#fff;}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{background:transparent;color:var(--brand);border:1.5px solid var(--brand);}
.btn-ghost:hover{background:var(--brand-soft);color:var(--brand-dark);}
.btn-sm{min-height:40px;padding:0 18px;font-size:14px;border-radius:8px;}
.btn-block{width:100%;}
.text-link{color:var(--brand);font-weight:600;font-size:14px;}
.text-link:hover{color:var(--brand-dark);text-decoration:underline;text-underline-offset:3px;}

/* ============ 导航 ============ */
.site-header{
  position:sticky;top:0;z-index:60;background:#fff;
  border-bottom:1px solid var(--line);
  transition:box-shadow .2s ease;
}
.site-header.is-scrolled{box-shadow:0 1px 8px rgba(34,31,42,.08);}
.nav-shell{
  display:grid;grid-template-columns:1fr auto 1fr;align-items:center;
  height:72px;gap:16px;
}
.nav-left{display:flex;align-items:center;gap:26px;}
.nav-left a,.nav-right a{
  font-size:15px;color:var(--text);position:relative;padding:6px 0;line-height:44px;
}
.nav-left a:hover,.nav-right a:hover{color:var(--brand);}
.nav-left a.is-active{color:var(--brand);font-weight:600;}
.nav-left a.is-active::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--brand);border-radius:2px;
}
.brand{display:inline-flex;align-items:center;gap:10px;justify-self:center;}
.brand-mark{
  width:28px;height:28px;border-radius:8px;background:var(--brand);color:#fff;
  display:inline-flex;align-items:center;justify-content:center;flex:0 0 28px;
}
.brand-text{font-size:20px;font-weight:700;color:var(--ink);letter-spacing:0;white-space:nowrap;}
.nav-right{display:flex;align-items:center;gap:22px;justify-content:flex-end;}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:10px;align-items:center;justify-content:center;
  border:1px solid var(--line);
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px;margin:2px auto;}
.mobile-panel{
  position:fixed;left:0;right:0;top:72px;bottom:0;z-index:55;
  background:var(--ink-deep);padding:16px 20px 120px;overflow-y:auto;
  opacity:0;visibility:hidden;transform:translateY(-10px);transition:opacity .22s ease,transform .22s ease,visibility .22s;
}
.mobile-panel.is-open{opacity:1;visibility:visible;transform:none;}
.mobile-panel a.m-link{
  display:flex;align-items:center;justify-content:space-between;
  height:52px;color:rgba(255,255,255,.9);font-size:16px;border-bottom:1px solid rgba(255,255,255,.12);
}
.mobile-panel a.m-link:hover{color:var(--brand);}
.mobile-cta{position:fixed;left:20px;right:20px;bottom:20px;z-index:56;}
@media (max-width:1023px){
  .nav-shell{display:flex;justify-content:space-between;}
  .nav-left,.nav-right{display:none;}
  .nav-toggle{display:inline-flex;flex-direction:column;}
}

/* ============ 面包屑 ============ */
.crumb{
  padding:20px 0 0;font-size:14px;color:var(--muted);
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
}
.crumb a{color:var(--muted);}
.crumb a:hover{color:var(--brand);}
.crumb .sep{color:#CFC7BD;}
.crumb .current{color:var(--ink);}

/* ============ 文章头部 ============ */
.article-hero{padding:24px 0 0;}
.badge-row{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin-bottom:16px;}
.badge{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:999px;
  font-size:12px;font-weight:600;line-height:1;background:var(--brand-soft);color:var(--brand-dark);
}
.badge.jade{background:rgba(18,137,122,.1);color:var(--jade);}
.badge.plain{background:#fff;color:var(--muted);border:1px solid var(--line);}
.article-title{font-size:clamp(28px,3.6vw,40px);line-height:1.32;font-weight:700;color:var(--ink);}
.article-meta{
  display:flex;flex-wrap:wrap;gap:8px 22px;margin-top:18px;
  font-size:14px;color:var(--muted);
}
.article-meta .mono{color:var(--muted);}
.article-meta .dot{width:4px;height:4px;border-radius:50%;background:#CFC7BD;align-self:center;}

/* ============ 封面 ============ */
.cover-figure{margin:28px 0 0;}
.cover-figure img{
  width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:var(--r-card);
  border:1px solid var(--line);
}
.cover-figure figcaption{margin-top:12px;text-align:center;font-size:13px;color:var(--muted);}

/* ============ 正文布局 ============ */
.article-layout{
  display:grid;grid-template-columns:minmax(0,8fr) minmax(0,4fr);
  gap:48px;align-items:start;padding-top:36px;
}
@media (max-width:1023px){
  .article-layout{grid-template-columns:minmax(0,1fr);gap:40px;}
}
.article-main{max-width:760px;}

.article-body{font-size:17px;line-height:1.9;color:var(--text);}
.article-body p{margin:0 0 1.2em;}
.article-body h2{
  font-size:22px;line-height:1.4;font-weight:700;color:var(--ink);
  margin:48px 0 16px;padding-left:12px;border-left:4px solid var(--brand);
}
.article-body h3{font-size:19px;line-height:1.5;font-weight:600;color:var(--ink);margin:32px 0 12px;}
.article-body ul,.article-body ol{margin:0 0 1.2em;padding-left:1.2em;}
.article-body ul li{position:relative;padding-left:16px;margin-bottom:8px;}
.article-body ul li::before{
  content:"";position:absolute;left:0;top:.72em;width:6px;height:6px;border-radius:2px;background:var(--brand);
}
.article-body ol{list-style:decimal;}
.article-body ol li{margin-bottom:8px;}
.article-body blockquote{
  margin:24px 0;padding:18px 20px;background:var(--bg);
  border-left:4px solid var(--brand);border-radius:0 var(--r-img) var(--r-img) 0;
  color:var(--text);font-style:normal;
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body img{border-radius:var(--r-img);margin:24px auto;}
.article-body figure{margin:24px 0;}
.article-body figcaption{font-size:13px;color:var(--muted);text-align:center;margin-top:10px;}
.article-body a{color:var(--brand);text-decoration:underline;text-underline-offset:3px;}
.article-body a:hover{color:var(--brand-dark);}
.article-body strong{color:var(--ink);font-weight:600;}
.table-scroll{width:100%;overflow-x:auto;margin:24px 0;border:1px solid var(--line);border-radius:var(--r-card);}
.article-body table{width:100%;border-collapse:collapse;font-size:15px;min-width:520px;}
.article-body thead th{background:#fff;font-weight:700;color:var(--ink);text-align:left;}
.article-body th,.article-body td{padding:12px 16px;border-bottom:1px solid var(--line);}
.article-body tbody tr:nth-child(even){background:var(--bg);}
.article-body tbody tr:last-child td{border-bottom:0;}

.empty-state{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:56px 24px;text-align:center;box-shadow:var(--sh-1);
}
.empty-state svg{color:var(--disabled);margin:0 auto 16px;}
.empty-state p{font-size:14px;color:var(--muted);margin-bottom:20px;}

/* ============ 侧栏 ============ */
.sidebar{position:sticky;top:96px;display:flex;flex-direction:column;gap:20px;}
@media (max-width:1023px){ .sidebar{position:static;} }
.side-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:20px;box-shadow:var(--sh-1);
}
.side-title{
  display:flex;align-items:center;gap:8px;font-size:15px;font-weight:700;color:var(--ink);margin-bottom:14px;
}
.side-title .bar{width:3px;height:16px;border-radius:2px;background:var(--brand);}
.side-list li{border-bottom:1px dashed var(--line);padding:10px 0;}
.side-list li:last-child{border-bottom:0;padding-bottom:0;}
.side-list a{font-size:14px;color:var(--text);line-height:1.6;display:block;}
.side-list a:hover{color:var(--brand);}
.side-list .time{display:block;margin-top:4px;font-size:12px;color:var(--disabled);font-family:var(--mono);}
.side-post{display:flex;gap:12px;align-items:flex-start;padding:10px 0;border-bottom:1px dashed var(--line);}
.side-post:last-child{border-bottom:0;padding-bottom:0;}
.side-post img{width:64px;height:64px;flex:0 0 64px;border-radius:8px;object-fit:cover;border:1px solid var(--line);}
.side-post .t{font-size:14px;color:var(--text);line-height:1.6;}
.side-post:hover .t{color:var(--brand);}

/* ============ 标签 / 前后篇 / 相关 ============ */
.tag-block{margin-top:40px;}
.tag-block .label{font-size:14px;color:var(--muted);margin-bottom:12px;}
.tag-list{display:flex;flex-wrap:wrap;gap:10px;}
.tag-list a{
  display:inline-flex;align-items:center;height:32px;padding:0 14px;border-radius:999px;
  background:#fff;border:1px solid var(--line);font-size:13px;color:var(--muted);
}
.tag-list a:hover{border-color:var(--brand);color:var(--brand-dark);background:var(--brand-soft);}

.pn-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:36px;}
@media (max-width:639px){ .pn-grid{grid-template-columns:1fr;} }
.pn-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:18px 20px;transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
}
.pn-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:#F6CFBE;}
.pn-card .dir{font-size:12px;color:var(--disabled);font-weight:600;letter-spacing:0;margin-bottom:8px;display:block;}
.pn-card .t{font-size:15px;font-weight:600;color:var(--ink);line-height:1.6;}

.related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;margin-top:28px;}
@media (max-width:1023px){ .related-grid{grid-template-columns:repeat(2,minmax(0,1fr));} }
@media (max-width:639px){ .related-grid{grid-template-columns:1fr;} }
.rel-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;box-shadow:var(--sh-1);
  transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
}
.rel-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:#F6CFBE;}
.rel-card img{width:100%;aspect-ratio:16/10;object-fit:cover;}
.rel-card .body{padding:16px 18px 20px;}
.rel-card .t{font-size:16px;font-weight:600;color:var(--ink);line-height:1.55;}
.rel-card .time{display:block;margin-top:10px;font-size:12px;color:var(--disabled);font-family:var(--mono);}

.block-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;flex-wrap:wrap;}
.block-head h2{font-size:clamp(22px,2.4vw,28px);}

/* ============ CTA 带 ============ */
.cta-band{
  margin-top:var(--sect);background:var(--brand-soft);border-radius:var(--r-card-lg);
  padding:40px 32px;display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap;
}
.cta-band h2{font-size:clamp(22px,2.4vw,28px);}
.cta-band p{margin-top:8px;font-size:15px;color:var(--muted);}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap;}
@media (max-width:639px){ .cta-band{padding:28px 20px;} .cta-actions .btn{width:100%;} }

/* ============ 页脚 ============ */
.site-footer{margin-top:var(--sect);background:var(--ink-deep);color:rgba(255,255,255,.85);padding:56px 0 0;}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:32px;}
@media (max-width:1023px){ .footer-grid{grid-template-columns:1fr 1fr;} }
@media (max-width:639px){ .footer-grid{grid-template-columns:1fr;gap:28px;} }
.footer-brand .brand{margin-bottom:14px;justify-self:start;}
.footer-brand .brand-text{color:#fff;}
.footer-brand p{font-size:14px;color:rgba(255,255,255,.7);line-height:1.8;max-width:340px;}
.footer-title{font-size:14px;font-weight:700;color:#fff;margin-bottom:14px;}
.footer-links li,.footer-contact li{margin-bottom:10px;font-size:14px;color:rgba(255,255,255,.72);}
.footer-links a{color:rgba(255,255,255,.72);}
.footer-links a:hover{color:var(--brand);text-decoration:underline;text-underline-offset:3px;}
.footer-bottom{
  margin-top:44px;border-top:1px solid rgba(255,255,255,.12);
  padding:20px 0 24px;display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;
  font-size:13px;color:rgba(255,255,255,.6);
}
.to-top{color:rgba(255,255,255,.72);}
.to-top:hover{color:var(--brand);text-decoration:underline;text-underline-offset:3px;}

/* roulang page: category1 */
:root{
  --primary:#E8541F;
  --primary-dark:#C23F0E;
  --primary-light:#FDEDE6;
  --ink:#221F2A;
  --ink-deep:#17161B;
  --jade:#12897A;
  --danger:#B3261E;
  --bg:#FAF7F3;
  --card:#FFFFFF;
  --line:#EAE4DC;
  --text:#2B2733;
  --muted:#6B6572;
  --disabled:#A9A2AE;
  --radius-sm:8px;
  --radius:14px;
  --radius-lg:18px;
  --radius-pill:999px;
  --shadow-1:0 1px 2px rgba(34,31,42,.05),0 8px 24px rgba(34,31,42,.06);
  --shadow-2:0 12px 30px rgba(34,31,42,.12);
  --font-base:system-ui,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",sans-serif;
  --font-mono:"DIN Alternate","Barlow",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-base);
  font-size:16px;
  line-height:1.85;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{padding:0;list-style:none}
a{color:var(--primary);text-decoration:none;transition:color .18s ease,border-color .18s ease}
a:hover{color:var(--primary-dark)}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:2px solid rgba(232,84,31,.4);outline-offset:2px;border-radius:4px}
button{font-family:inherit}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums}
.wrap{max-width:1200px;margin:0 auto;padding:0 20px}
@media (min-width:1024px){.wrap{padding:0 32px}}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:48px;padding:0 28px;border-radius:var(--radius-sm);
  font-size:15px;font-weight:600;line-height:1;cursor:pointer;
  border:1.5px solid transparent;transition:all .18s ease;white-space:nowrap;
}
.btn-primary{background:var(--primary);color:#fff;border-color:var(--primary)}
.btn-primary:hover{background:var(--primary-dark);border-color:var(--primary-dark);color:#fff;transform:translateY(-1px)}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{background:transparent;color:var(--primary);border-color:var(--primary)}
.btn-ghost:hover{background:var(--primary-light);color:var(--primary-dark);border-color:var(--primary-dark)}
.btn-sm{min-height:40px;padding:0 18px;font-size:14px;border-radius:var(--radius-sm)}
.link-more{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--primary)}
.link-more:hover{color:var(--primary-dark);text-decoration:underline;text-underline-offset:3px}

/* ============ 导航 ============ */
.site-header{position:sticky;top:0;z-index:80;background:#fff;border-bottom:1px solid var(--line);transition:box-shadow .2s ease}
.site-header.is-scrolled{box-shadow:0 1px 8px rgba(34,31,42,.08)}
.nav-wrap{display:flex;align-items:center;height:72px;position:relative}
.nav-left{display:flex;align-items:center;gap:24px;flex:1 1 0;min-width:0}
.nav-right{display:flex;align-items:center;gap:18px;flex:1 1 0;justify-content:flex-end;min-width:0}
.nav-left a,.nav-right a.nav-link{position:relative;font-size:15px;font-weight:500;color:var(--text);padding:10px 0;display:inline-flex;align-items:center;min-height:44px}
.nav-left a::after{content:"";position:absolute;left:0;right:0;bottom:6px;height:2px;border-radius:2px;background:var(--primary);transform:scaleX(0);transform-origin:left;transition:transform .18s ease}
.nav-left a:hover{color:var(--primary)}
.nav-left a:hover::after{transform:scaleX(1)}
.nav-left a.is-active{color:var(--primary)}
.nav-left a.is-active::after{transform:scaleX(1)}
.nav-right a.nav-link:hover{color:var(--primary)}
.brand{
  position:absolute;left:50%;transform:translateX(-50%);
  display:inline-flex;align-items:center;gap:10px;color:var(--ink);
}
.brand:hover{color:var(--ink)}
.brand-mark{width:28px;height:28px;border-radius:8px;background:var(--primary-light);color:var(--primary);display:inline-flex;align-items:center;justify-content:center;flex:0 0 28px}
.brand-text{font-size:20px;font-weight:700;letter-spacing:0;white-space:nowrap}
.nav-toggle{
  display:none;width:44px;height:44px;border:1px solid var(--line);background:#fff;border-radius:var(--radius-sm);
  align-items:center;justify-content:center;color:var(--ink);cursor:pointer;
}
.mobile-panel{display:none}
@media (max-width:1023px){
  .nav-left,.nav-right{display:none}
  .brand{position:static;transform:none}
  .brand-text{font-size:17px}
  .nav-wrap{justify-content:space-between;gap:12px}
  .nav-toggle{display:inline-flex}
  .mobile-panel{display:block;position:fixed;left:0;right:0;top:72px;bottom:0;background:var(--ink-deep);z-index:79;padding:16px 20px 96px;overflow-y:auto;transform:translateY(-8px);opacity:0;visibility:hidden;transition:opacity .2s ease,transform .2s ease,visibility .2s}
  .mobile-panel.is-open{opacity:1;visibility:visible;transform:translateY(0)}
  .mobile-panel a{display:flex;align-items:center;justify-content:space-between;height:52px;color:rgba(255,255,255,.9);font-size:16px;border-bottom:1px solid rgba(255,255,255,.1)}
  .mobile-panel a:hover{color:var(--primary)}
  .mobile-panel a.is-active{color:var(--primary)}
  .mobile-cta{position:fixed;left:20px;right:20px;bottom:20px}
  .mobile-cta .btn{width:100%}
}

/* ============ 面包屑 ============ */
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:14px;color:var(--muted);margin-bottom:16px}
.breadcrumb a{color:var(--muted)}
.breadcrumb a:hover{color:var(--primary);text-decoration:underline;text-underline-offset:3px}
.breadcrumb .sep{color:var(--disabled)}
.breadcrumb .current{color:var(--ink)}

/* ============ 顶部窄条 ============ */
.page-hero{background:var(--bg);border-bottom:1px solid var(--line);position:relative;overflow:hidden}
.page-hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:repeating-linear-gradient(90deg,rgba(232,84,31,.06) 0 1px,transparent 1px 42px);
  opacity:.7;
}
.page-hero-inner{position:relative;display:flex;align-items:center;gap:32px;min-height:200px;padding:28px 0}
.page-hero-text{flex:1 1 auto;min-width:0;max-width:640px}
.page-hero h1{font-size:clamp(26px,3.4vw,40px);line-height:1.32;font-weight:700;color:var(--ink);margin-bottom:12px}
.page-hero p{font-size:14px;color:var(--muted);line-height:1.7}
.page-hero-media{flex:0 0 400px;width:400px}
.page-hero-media img{width:100%;height:180px;object-fit:cover;border-radius:var(--radius);border:1px solid var(--line);box-shadow:var(--shadow-1)}
@media (max-width:1023px){
  .page-hero-inner{flex-direction:column;align-items:flex-start;gap:24px;padding:32px 0}
  .page-hero-media{flex:0 0 auto;width:100%}
  .page-hero-media img{height:160px}
}

/* ============ 主体布局 ============ */
.layout-section{padding:56px 0}
@media (min-width:1024px){.layout-section{padding:72px 0}}
.layout-x{margin:0 auto;max-width:1200px;padding:0 20px}
@media (min-width:1024px){.layout-x{padding:0 32px}}

.toc-cell{padding-right:0}
.toc{position:sticky;top:96px;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow-1)}
.toc-title{font-size:13px;font-weight:600;color:var(--muted);letter-spacing:0;margin-bottom:12px;padding-bottom:12px;border-bottom:1px solid var(--line)}
.toc-list li{position:relative}
.toc-list li span{display:block;font-size:15px;color:var(--text);padding:12px 12px 12px 16px;border-radius:10px;transition:background .18s ease,color .18s ease}
.toc-list li.is-active span{background:var(--primary-light);color:var(--primary);font-weight:600}
.toc-list li.is-active span::before{content:"";position:absolute;left:0;top:10px;bottom:10px;width:3px;border-radius:3px;background:var(--primary)}
.toc-list li:hover span{background:var(--bg)}
.toc-note{margin-top:16px;padding-top:16px;border-top:1px solid var(--line);font-size:13px;color:var(--muted);line-height:1.7}

.list-cell{padding-left:0}
@media (min-width:1024px){.list-cell{padding-left:32px}}

.list-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:24px}
.list-head h2{font-size:clamp(20px,2.4vw,26px);font-weight:700;color:var(--ink);line-height:1.35}
.list-head .meta{font-size:14px;color:var(--muted)}

.entry-list{border-top:1px solid var(--line)}
.entry-row{display:flex;gap:24px;padding:24px 16px;border-bottom:1px solid var(--line);transition:background .18s ease}
.entry-row:hover{background:var(--bg)}
.entry-index{font-family:var(--font-mono);font-size:32px;line-height:1.1;font-weight:600;color:var(--disabled);flex:0 0 56px}
.entry-row:hover .entry-index{color:var(--primary)}
.entry-body{min-width:0}
.entry-title{font-size:18px;font-weight:600;line-height:1.5;color:var(--ink);margin-bottom:8px;transition:color .18s ease}
.entry-row:hover .entry-title{color:var(--primary)}
.entry-desc{font-size:15px;color:var(--muted);line-height:1.8;margin-bottom:12px}
.entry-tags{display:flex;flex-wrap:wrap;gap:8px}
.badge{
  display:inline-flex;align-items:center;height:24px;padding:0 12px;border-radius:var(--radius-pill);
  font-size:12px;font-weight:600;line-height:1;background:var(--primary-light);color:var(--primary-dark);
}
.badge-jade{background:rgba(18,137,122,.1);color:var(--jade)}
.badge-line{background:#fff;border:1px solid var(--line);color:var(--muted)}
.list-foot{margin-top:32px}

@media (max-width:1023px){
  .toc-cell{padding-right:0;margin-bottom:24px}
  .toc{position:static}
  .list-cell{padding-left:0}
  .entry-row{gap:16px;padding:20px 8px}
  .entry-index{font-size:26px;flex:0 0 44px}
}

/* ============ 提示排查板块 ============ */
.panel-section{padding:56px 0;background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
@media (min-width:1024px){.panel-section{padding:80px 0}}
.section-head{max-width:720px;margin-bottom:32px}
.section-head h2{font-size:clamp(22px,2.6vw,32px);font-weight:700;color:var(--ink);line-height:1.32;margin-bottom:12px}
.section-head p{font-size:15px;color:var(--muted)}
.panel-grid{display:grid;grid-template-columns:minmax(0,5fr) minmax(0,7fr);gap:32px;align-items:start}
.panel-media img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--radius-lg);border:1px solid var(--line);box-shadow:var(--shadow-1)}
.panel-list{display:grid;gap:16px}
.panel-item{display:flex;gap:16px;background:var(--bg);border:1px solid var(--line);border-radius:var(--radius);padding:20px;transition:box-shadow .2s ease,transform .2s ease,border-color .2s ease}
.panel-item:hover{box-shadow:var(--shadow-1);transform:translateY(-2px);border-color:var(--primary-light)}
.panel-icon{flex:0 0 32px;width:32px;height:32px;color:var(--primary);display:inline-flex;align-items:center;justify-content:center}
.panel-item h3{font-size:16px;font-weight:600;color:var(--ink);margin-bottom:6px;line-height:1.5}
.panel-item p{font-size:14px;color:var(--muted);line-height:1.75}
@media (max-width:1023px){
  .panel-grid{grid-template-columns:minmax(0,1fr);gap:24px}
  .panel-media img{aspect-ratio:16/9}
}

/* ============ FAQ ============ */
.faq-section{padding:56px 0}
@media (min-width:1024px){.faq-section{padding:80px 0}}
.faq-acc.accordion{background:transparent;border:none;margin:0}
.faq-acc .accordion-item{
  position:relative;background:#fff;border:1px solid var(--line);border-radius:12px;
  margin-bottom:12px;overflow:hidden;transition:border-color .18s ease,box-shadow .18s ease;
}
.faq-acc .accordion-item:hover{box-shadow:var(--shadow-1)}
.faq-acc .accordion-item.is-active{border-color:var(--primary)}
.faq-acc .accordion-item.is-active::before{content:"";position:absolute;left:0;top:12px;bottom:12px;width:3px;border-radius:0 3px 3px 0;background:var(--primary);z-index:2}
.faq-acc .accordion-title{
  display:block;position:relative;padding:18px 56px 18px 20px;
  font-size:17px;font-weight:600;line-height:1.6;color:var(--ink);
  background:transparent;border:none;
}
.faq-acc .accordion-title:hover{color:var(--primary)}
.faq-acc .accordion-title::before{
  content:"";position:absolute;right:27px;top:50%;width:2px;height:12px;
  margin-top:0;background:var(--muted);transform:translateY(-50%);transition:transform .18s ease,background .18s ease;
}
.faq-acc .accordion-title::after{
  content:"";position:absolute;right:22px;top:50%;width:12px;height:2px;
  margin-top:0;background:var(--muted);transform:translateY(-50%);transition:background .18s ease;
}
.faq-acc .accordion-item.is-active .accordion-title{color:var(--primary-dark)}
.faq-acc .accordion-item.is-active .accordion-title::before{transform:translateY(-50%) scaleY(0);background:var(--primary)}
.faq-acc .accordion-item.is-active .accordion-title::after{background:var(--primary)}
.faq-acc .accordion-content{
  padding:0 20px 20px;background:transparent;border:none;
  font-size:15px;color:var(--muted);line-height:1.85;
}
.faq-acc .accordion-content p{margin:0}

/* ============ CTA 条 ============ */
.cta-band{background:var(--primary-light);border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:48px 0}
@media (min-width:1024px){.cta-band{padding:56px 0}}
.cta-inner{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:24px}
.cta-text h2{font-size:clamp(20px,2.4vw,28px);font-weight:700;color:var(--ink);line-height:1.35;margin-bottom:8px}
.cta-text p{font-size:15px;color:var(--muted)}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}
@media (max-width:639px){
  .cta-actions{width:100%}
  .cta-actions .btn{flex:1 1 100%}
}

/* ============ 页脚 ============ */
.site-footer{background:var(--ink-deep);color:rgba(255,255,255,.85);padding:56px 0 24px;margin-top:0}
.site-footer a{color:rgba(255,255,255,.85)}
.site-footer a:hover{color:var(--primary);text-decoration:underline;text-underline-offset:3px}
.footer-grid{display:grid;grid-template-columns:minmax(0,1.4fr) repeat(3,minmax(0,1fr));gap:32px;padding-bottom:40px;border-bottom:1px solid rgba(255,255,255,.12)}
.footer-brand .brand{position:static;transform:none;color:#fff;margin-bottom:16px}
.footer-brand .brand:hover{color:#fff}
.footer-brand .brand-mark{background:rgba(232,84,31,.18);color:var(--primary)}
.footer-brand p{font-size:14px;line-height:1.8;color:rgba(255,255,255,.7);max-width:340px}
.footer-title{font-size:14px;font-weight:600;color:#fff;margin-bottom:16px}
.footer-links li{margin-bottom:10px}
.footer-links a,.footer-contact li{font-size:14px;line-height:1.7}
.footer-contact li{margin-bottom:10px;color:rgba(255,255,255,.7)}
.footer-contact .mono{color:rgba(255,255,255,.9)}
.footer-bottom{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;padding-top:20px;font-size:13px;color:rgba(255,255,255,.6)}
.to-top{display:inline-flex;align-items:center;min-height:44px;font-size:13px}
@media (max-width:1023px){
  .footer-grid{grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:28px}
}
@media (max-width:639px){
  .footer-grid{grid-template-columns:minmax(0,1fr)}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}

/* roulang page: category2 */
:root{
  --primary:#E8541F;
  --primary-dark:#C23F0E;
  --primary-soft:#FDEDE6;
  --ink:#221F2A;
  --deep:#17161B;
  --bamboo:#12897A;
  --warn:#B3261E;
  --bg:#FAF7F3;
  --card:#FFFFFF;
  --line:#EAE4DC;
  --text:#2B2733;
  --muted:#6B6572;
  --disabled:#A9A2AE;
  --r-card:14px;
  --r-large:18px;
  --r-btn:8px;
  --r-img:10px;
  --shadow-1:0 1px 2px rgba(34,31,42,.05),0 8px 24px rgba(34,31,42,.06);
  --shadow-2:0 12px 30px rgba(34,31,42,.12);
  --font:system-ui,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",sans-serif;
  --mono:"DIN Alternate","Barlow",ui-monospace,SFMono-Regular,Menlo,monospace;
  --sec:104px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.85;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-radius:var(--r-img);}
a{color:var(--primary);text-decoration:none;transition:color .2s ease,text-underline-offset .2s ease;}
a:hover{color:var(--primary-dark);}
h1,h2,h3,h4,p,ul,ol{margin:0;}
ul,ol{padding:0;list-style:none;}
button{font-family:inherit;}
input,select,textarea{font-family:inherit;font-size:15px;}
:focus-visible{outline:2px solid rgba(232,84,31,.4);outline-offset:2px;border-radius:4px;}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums;}
.wrap{max-width:1200px;margin:0 auto;padding:0 20px;}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:80;background:#fff;
  border-bottom:1px solid var(--line);
  transition:box-shadow .25s ease;
}
.site-header.is-scrolled{box-shadow:0 1px 8px rgba(34,31,42,.08);}
.nav-wrap{
  display:flex;align-items:center;justify-content:space-between;
  height:72px;gap:16px;
}
.nav-left,.nav-right{display:flex;align-items:center;gap:4px;flex:1;}
.nav-right{justify-content:flex-end;gap:8px;}
.nav-left a{
  display:inline-flex;align-items:center;height:44px;padding:0 12px;
  color:var(--ink);font-size:15px;font-weight:500;position:relative;
  border-radius:6px;
}
.nav-left a::after{
  content:"";position:absolute;left:12px;right:12px;bottom:9px;height:2px;
  background:var(--primary);border-radius:2px;transform:scaleX(0);transition:transform .2s ease;
}
.nav-left a:hover{color:var(--primary-dark);background:var(--primary-soft);}
.nav-left a:hover::after{transform:scaleX(1);}
.nav-left a.is-active{color:var(--primary);font-weight:600;}
.nav-left a.is-active::after{transform:scaleX(1);}
.brand{
  display:inline-flex;align-items:center;gap:10px;
  color:var(--ink);font-size:20px;font-weight:700;letter-spacing:0;
  white-space:nowrap;flex:0 0 auto;
}
.brand:hover{color:var(--ink);}
.brand-mark{
  width:28px;height:28px;border-radius:8px;background:var(--primary);color:#fff;
  display:inline-flex;align-items:center;justify-content:center;flex:0 0 28px;
}
.nav-right .nav-link{color:var(--muted);font-size:15px;padding:0 10px;height:44px;display:inline-flex;align-items:center;}
.nav-right .nav-link:hover{color:var(--primary-dark);}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 28px;border-radius:var(--r-btn);border:1.5px solid transparent;
  font-size:15px;font-weight:600;cursor:pointer;transition:all .2s ease;white-space:nowrap;
  min-width:44px;
}
.btn-primary{background:var(--primary);color:#fff;}
.btn-primary:hover{background:var(--primary-dark);color:#fff;transform:translateY(-1px);}
.btn-primary:active{transform:translateY(1px);}
.btn-ghost{background:transparent;border-color:var(--primary);color:var(--primary);}
.btn-ghost:hover{background:var(--primary-soft);color:var(--primary-dark);transform:translateY(-1px);}
.btn-ghost:active{transform:translateY(1px);}
.btn-sm{height:40px;padding:0 18px;font-size:14px;}
.btn-block{width:100%;}
.link-more{display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:600;color:var(--primary);}
.link-more:hover{color:var(--primary-dark);text-decoration:underline;text-underline-offset:3px;}
.nav-toggle{
  display:none;width:44px;height:44px;border:1px solid var(--line);background:#fff;
  border-radius:8px;align-items:center;justify-content:center;cursor:pointer;color:var(--ink);
}
.mobile-panel{
  position:fixed;left:0;right:0;top:72px;bottom:0;background:var(--ink);color:#fff;
  z-index:79;padding:12px 0 108px;overflow-y:auto;
  opacity:0;visibility:hidden;transform:translateY(-10px);transition:all .25s ease;
}
.mobile-panel.is-open{opacity:1;visibility:visible;transform:none;}
.mobile-panel a.m-item{
  display:flex;align-items:center;justify-content:space-between;
  height:52px;padding:0 20px;color:rgba(255,255,255,.92);font-size:16px;
  border-bottom:1px solid rgba(255,255,255,.08);
}
.mobile-panel a.m-item:hover{background:rgba(255,255,255,.06);color:#fff;}
.mobile-panel a.m-item.is-active{color:var(--primary);font-weight:600;}
.mobile-cta{
  position:fixed;left:0;right:0;bottom:0;padding:14px 20px 18px;
  background:linear-gradient(180deg,rgba(23,22,27,0) 0%,rgba(23,22,27,.96) 40%);
  z-index:81;
}

/* ---------- Breadcrumb ---------- */
.breadcrumb{
  max-width:1200px;margin:0 auto;padding:20px 20px 0;
  font-size:14px;color:var(--muted);display:flex;flex-wrap:wrap;gap:6px;align-items:center;
}
.breadcrumb a{color:var(--muted);}
.breadcrumb a:hover{color:var(--primary);}
.breadcrumb .sep{color:var(--disabled);}
.breadcrumb .current{color:var(--ink);font-weight:600;}

/* ---------- Hero ---------- */
.hero{padding:32px 0 var(--sec);position:relative;overflow:hidden;}
.hero-grid{display:grid;grid-template-columns:7fr 5fr;gap:48px;align-items:center;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:999px;
  background:var(--primary-soft);color:var(--primary-dark);font-size:12px;font-weight:600;
  margin-bottom:20px;
}
.eyebrow .dot{width:6px;height:6px;border-radius:50%;background:var(--primary);}
h1{
  font-size:clamp(30px,4.2vw,50px);line-height:1.28;font-weight:700;color:var(--ink);
  letter-spacing:0;max-width:16em;
}
.hero-sub{margin-top:20px;font-size:16px;line-height:1.9;color:var(--muted);max-width:34em;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px;}
.hero-media{position:relative;}
.hero-media img{
  width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--r-large);
  border:1px solid var(--line);box-shadow:var(--shadow-1);
}
.hero-badge{
  position:absolute;right:18px;bottom:-22px;background:#fff;border:1px solid var(--line);
  border-radius:var(--r-card);padding:16px 20px;box-shadow:var(--shadow-1);min-width:172px;
}
.hero-badge .num{font-family:var(--mono);font-size:26px;font-weight:700;color:var(--primary);line-height:1.1;}
.hero-badge .lbl{font-size:13px;color:var(--muted);margin-top:4px;}

/* ---------- Section base ---------- */
.section{padding-bottom:var(--sec);}
.section-head{max-width:44em;margin-bottom:40px;}
.section-head h2{font-size:clamp(24px,2.8vw,34px);line-height:1.3;font-weight:700;color:var(--ink);}
.section-head p{margin-top:14px;color:var(--muted);font-size:16px;}
.tag{
  display:inline-block;padding:5px 12px;border-radius:999px;background:var(--primary-soft);
  color:var(--primary-dark);font-size:12px;font-weight:600;margin-bottom:14px;
}
.tag-teal{background:rgba(18,137,122,.1);color:var(--bamboo);}

/* ---------- Feature blocks ---------- */
.block-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:32px;}
.feature-block{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:0 0 26px;overflow:hidden;transition:box-shadow .2s ease,transform .2s ease,border-color .2s ease;
}
.feature-block:hover{box-shadow:var(--shadow-2);transform:translateY(-2px);border-color:#F3C8B6;}
.feature-block img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:0;}
.feature-body{padding:24px 26px 0;}
.feature-body h3{font-size:20px;line-height:1.4;font-weight:600;color:var(--ink);}
.feature-body p{margin-top:12px;color:var(--muted);font-size:15px;line-height:1.85;}
.feature-body .link-more{margin-top:18px;}

/* ---------- Checklist strip ---------- */
.check-strip{
  display:grid;grid-template-columns:repeat(3,1fr);gap:0;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;
}
.check-item{padding:28px 26px;border-right:1px solid var(--line);}
.check-item:last-child{border-right:none;}
.check-item .idx{font-family:var(--mono);font-size:14px;color:var(--primary);font-weight:700;}
.check-item h3{font-size:17px;font-weight:600;color:var(--ink);margin-top:10px;}
.check-item p{margin-top:10px;font-size:14px;color:var(--muted);line-height:1.8;}

/* ---------- FAQ accordion ---------- */
.accordion.faq-acc{background:transparent;border:none;margin:0;}
.faq-acc .accordion-item{
  background:#fff;border:1px solid var(--line);border-radius:12px;
  margin-bottom:12px;position:relative;overflow:hidden;transition:border-color .2s ease;
}
.faq-acc .accordion-item:hover{border-color:#F3C8B6;}
.faq-acc .accordion-title{
  border:none;background:#fff;color:var(--ink);font-size:16px;font-weight:600;
  padding:18px 56px 18px 22px;line-height:1.6;position:relative;
}
.faq-acc .accordion-title:hover{background:#fff;color:var(--primary-dark);}
.faq-acc .accordion-title::after{
  content:"";position:absolute;right:24px;top:50%;width:12px;height:2px;background:var(--primary);
  transform:translateY(-50%);border-radius:2px;
}
.faq-acc .accordion-title::before{
  content:"";position:absolute;right:29px;top:50%;width:2px;height:12px;background:var(--primary);
  transform:translateY(-50%);border-radius:2px;transition:transform .2s ease,opacity .2s ease;
}
.faq-acc .accordion-item.is-active{border-color:var(--primary);}
.faq-acc .accordion-item.is-active::before{
  content:"";position:absolute;left:0;top:10px;bottom:10px;width:3px;
  background:var(--primary);border-radius:0 3px 3px 0;z-index:2;
}
.faq-acc .accordion-item.is-active .accordion-title::before{transform:translateY(-50%) rotate(90deg);opacity:0;}
.faq-acc .accordion-content{
  border:none;background:#fff;color:var(--muted);font-size:15px;line-height:1.85;
  padding:0 22px 20px;
}
.faq-acc .accordion-content p{margin:0;}

/* ---------- CTA band ---------- */
.cta-band{
  background:var(--primary-soft);border:1px solid #F6D3C4;border-radius:var(--r-large);
  padding:44px 40px;display:flex;align-items:center;justify-content:space-between;gap:32px;
}
.cta-band h2{font-size:clamp(22px,2.4vw,30px);line-height:1.35;font-weight:700;color:var(--ink);}
.cta-band p{margin-top:12px;color:#7A5B4C;font-size:15px;max-width:38em;}
.cta-band .btn{flex:0 0 auto;}
.back-row{margin-top:32px;display:flex;gap:14px;flex-wrap:wrap;}

/* ---------- Footer ---------- */
.site-footer{background:var(--deep);color:rgba(255,255,255,.85);padding:72px 0 0;margin-top:8px;}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;}
.footer-brand .brand{color:#fff;margin-bottom:18px;}
.footer-brand .brand:hover{color:#fff;}
.footer-brand p{font-size:14px;line-height:1.85;color:rgba(255,255,255,.7);max-width:26em;}
.footer-title{font-size:15px;font-weight:600;color:#fff;margin-bottom:18px;}
.footer-links li,.footer-contact li{font-size:14px;line-height:1.7;margin-bottom:12px;color:rgba(255,255,255,.75);}
.footer-links a{color:rgba(255,255,255,.75);}
.footer-links a:hover{color:var(--primary);text-decoration:underline;text-underline-offset:3px;}
.footer-contact .mono{color:rgba(255,255,255,.9);}
.footer-bottom{
  margin-top:56px;border-top:1px solid rgba(255,255,255,.12);
  padding:22px 0 28px;display:flex;flex-wrap:wrap;gap:14px;align-items:center;
  justify-content:space-between;font-size:13px;color:rgba(255,255,255,.6);
}
.footer-bottom .to-top{color:rgba(255,255,255,.8);}
.footer-bottom .to-top:hover{color:var(--primary);text-decoration:underline;text-underline-offset:3px;}

/* ---------- Responsive ---------- */
@media (max-width:1199px){
  .hero-grid{gap:36px;}
}
@media (max-width:1023px){
  :root{--sec:80px;}
  .nav-left,.nav-right{display:none;}
  .nav-toggle{display:inline-flex;}
  .nav-wrap{height:64px;}
  .mobile-panel{top:64px;}
  .brand{font-size:18px;}
  .hero-grid{grid-template-columns:1fr;gap:40px;}
  .hero-media img{aspect-ratio:16/10;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .cta-band{flex-direction:column;align-items:flex-start;}
}
@media (max-width:639px){
  :root{--sec:56px;}
  .wrap,.breadcrumb{padding-left:16px;padding-right:16px;}
  .brand-text{font-size:16px;}
  h1{font-size:30px;}
  .hero{padding:24px 0 var(--sec);}
  .hero-actions{flex-direction:column;align-items:stretch;}
  .hero-actions .btn{width:100%;}
  .hero-badge{position:static;margin-top:16px;min-width:0;}
  .block-grid{grid-template-columns:1fr;gap:24px;}
  .check-strip{grid-template-columns:1fr;}
  .check-item{border-right:none;border-bottom:1px solid var(--line);}
  .check-item:last-child{border-bottom:none;}
  .cta-band{padding:28px 22px;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .faq-acc .accordion-title{font-size:15px;padding:16px 52px 16px 18px;}
}

/* roulang page: category3 */
:root{
  --brand:#E8541F;
  --brand-dark:#C23F0E;
  --brand-soft:#FDEDE6;
  --ink:#221F2A;
  --ink-deep:#17161B;
  --jade:#12897A;
  --warn:#B3261E;
  --bg:#FAF7F3;
  --card:#FFFFFF;
  --line:#EAE4DC;
  --text:#2B2733;
  --muted:#6B6572;
  --disabled:#A9A2AE;
  --radius-card:14px;
  --radius-large:18px;
  --radius-btn:8px;
  --radius-img:10px;
  --shadow-1:0 1px 2px rgba(34,31,42,.05), 0 8px 24px rgba(34,31,42,.06);
  --shadow-2:0 12px 30px rgba(34,31,42,.12);
  --font-cn: system-ui,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",sans-serif;
  --font-num: "DIN Alternate","Barlow",ui-monospace,SFMono-Regular,Menlo,monospace;
  --gap-s:16px;
  --gap-m:24px;
  --gap-l:32px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.85;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-radius:var(--radius-img);}
a{color:inherit;text-decoration:none;transition:color .18s ease, background-color .18s ease, border-color .18s ease;}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{
  outline:2px solid rgba(232,84,31,.4);outline-offset:2px;border-radius:6px;
}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
button{font-family:inherit;cursor:pointer;border:0;background:none;}
input,select,textarea{font-family:inherit;font-size:16px;}

.wrap{max-width:1200px;margin:0 auto;padding:0 20px;}
@media (min-width:1024px){ .wrap{padding:0 32px;} }

.mono{font-family:var(--font-num);font-variant-numeric:tabular-nums;}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:#fff;
  border-bottom:1px solid var(--line);
  transition:box-shadow .2s ease;
}
.site-header.is-scrolled{box-shadow:0 1px 8px rgba(34,31,42,.08);}
.header-inner{
  display:flex;align-items:center;justify-content:space-between;
  min-height:72px;gap:var(--gap-m);
}
.nav-left,.nav-right{display:none;}
.brand{display:inline-flex;align-items:center;gap:10px;}
.brand-mark{
  width:28px;height:28px;flex:0 0 28px;border-radius:8px;
  background:var(--brand-soft);color:var(--brand);
  display:inline-flex;align-items:center;justify-content:center;
}
.brand-text{font-size:20px;font-weight:700;color:var(--ink);line-height:1.2;}

.nav-toggle{
  width:44px;height:44px;display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--line);border-radius:10px;background:#fff;color:var(--ink);
}
.nav-toggle svg{width:22px;height:22px;}

@media (min-width:1024px){
  .header-inner{
    display:grid;
    grid-template-columns:1fr auto 1fr;
    align-items:center;
    min-height:72px;
  }
  .nav-left{display:flex;align-items:center;gap:4px;justify-content:flex-start;}
  .nav-left a{
    position:relative;display:inline-flex;align-items:center;
    min-height:44px;padding:0 14px;font-size:15px;color:var(--muted);font-weight:500;
  }
  .nav-left a:hover{color:var(--brand-dark);}
  .nav-left a.active{color:var(--brand);font-weight:600;}
  .nav-left a.active::after{
    content:"";position:absolute;left:14px;right:14px;bottom:12px;height:2px;
    background:var(--brand);border-radius:2px;
  }
  .brand{justify-self:center;}
  .nav-right{display:flex;align-items:center;gap:6px;justify-content:flex-end;}
  .nav-right .nav-link{
    display:inline-flex;align-items:center;min-height:44px;padding:0 12px;
    font-size:15px;color:var(--muted);
  }
  .nav-right .nav-link:hover{color:var(--brand-dark);}
  .nav-toggle{display:none;}
}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 28px;border-radius:var(--radius-btn);
  font-size:16px;font-weight:600;line-height:1;
  transition:transform .18s ease, background-color .18s ease, color .18s ease, border-color .18s ease, box-shadow .18s ease;
}
.btn-primary{background:var(--brand);color:#fff;border:1.5px solid var(--brand);}
.btn-primary:hover{background:var(--brand-dark);border-color:var(--brand-dark);transform:translateY(-1px);}
.btn-primary:active{transform:translateY(1px);}
.btn-ghost{background:transparent;color:var(--brand);border:1.5px solid var(--brand);}
.btn-ghost:hover{background:var(--brand-soft);transform:translateY(-1px);}
.btn-ghost:active{transform:translateY(1px);}
.btn-sm{height:40px;padding:0 18px;font-size:14px;border-radius:8px;}

/* mobile panel */
.mobile-panel{
  display:none;
  background:var(--ink);
  color:#fff;
  border-top:1px solid rgba(255,255,255,.08);
}
body.nav-open .mobile-panel{display:block;}
.mobile-panel .panel-list{padding:8px 20px 20px;}
.mobile-panel .panel-list a{
  display:flex;align-items:center;justify-content:space-between;
  min-height:52px;border-bottom:1px solid rgba(255,255,255,.1);
  font-size:16px;color:rgba(255,255,255,.9);
}
.mobile-panel .panel-list a:hover{color:var(--brand);}
.mobile-panel .panel-list a svg{width:16px;height:16px;opacity:.6;}
.panel-cta{padding:16px 20px 24px;}
.panel-cta .btn{width:100%;background:var(--brand);color:#fff;}
@media (min-width:1024px){ .mobile-panel{display:none !important;} }

/* ---------- breadcrumb ---------- */
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:14px;color:var(--muted);line-height:1.7;
}
.breadcrumb .sep{color:var(--disabled);}
.breadcrumb .current{color:var(--ink);}

/* ---------- hero ---------- */
.page-hero{
  position:relative;
  border-bottom:1px solid var(--line);
  background:
    linear-gradient(90deg, rgba(250,247,243,.94) 0%, rgba(250,247,243,.86) 46%, rgba(250,247,243,.35) 100%),
    url("/assets/images/backpic/back-3.webp") right center / cover no-repeat;
  overflow:hidden;
}
.page-hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(232,84,31,.06) 1px, transparent 1px),
                   linear-gradient(90deg, rgba(232,84,31,.06) 1px, transparent 1px);
  background-size:36px 36px;
  opacity:.55;
}
.page-hero-inner{
  position:relative;z-index:2;
  padding:36px 0 44px;
  max-width:760px;
}
@media (min-width:1024px){ .page-hero-inner{padding:56px 0 64px;} }
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;font-weight:600;letter-spacing:0;
  color:var(--brand);background:var(--brand-soft);
  border-radius:999px;padding:6px 14px;
  margin-bottom:18px;
}
.page-hero h1{
  font-size:clamp(30px,4.2vw,50px);
  line-height:1.28;font-weight:700;color:var(--ink);
  margin-bottom:16px;
}
.page-hero .hero-sub{font-size:16px;color:var(--muted);max-width:620px;}

/* ---------- section base ---------- */
.section{padding:56px 0;}
@media (min-width:768px){ .section{padding:80px 0;} }
@media (min-width:1024px){ .section{padding:104px 0;} }
.section-head{max-width:720px;margin-bottom:var(--gap-l);}
.section-head h2{
  font-size:clamp(24px,2.8vw,34px);line-height:1.3;font-weight:700;color:var(--ink);
  margin-bottom:12px;
}
.section-head p{color:var(--muted);font-size:16px;}
.section-alt{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line);}

/* ---------- metric strip ---------- */
.metric-strip{
  display:grid;grid-template-columns:1fr;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius-large);
  box-shadow:var(--shadow-1);
  overflow:hidden;
  margin-top:-32px;position:relative;z-index:5;
}
@media (min-width:768px){ .metric-strip{grid-template-columns:repeat(3,1fr);} }
.metric-cell{
  padding:24px;
  border-bottom:1px solid var(--line);
}
.metric-cell:last-child{border-bottom:0;}
@media (min-width:768px){
  .metric-cell{border-bottom:0;border-right:1px solid var(--line);}
  .metric-cell:last-child{border-right:0;}
}
.metric-value{
  font-family:var(--font-num);font-size:40px;line-height:1.1;font-weight:700;color:var(--ink);
  display:flex;align-items:baseline;gap:6px;
}
.metric-value .unit{font-size:15px;font-weight:600;color:var(--muted);font-family:var(--font-cn);}
.metric-label{font-size:14px;color:var(--muted);margin-top:8px;}
.metric-note{
  font-size:14px;color:var(--jade);margin-top:12px;
  display:inline-flex;align-items:center;gap:6px;font-weight:600;
}
.metric-note.warn{color:var(--warn);}
.metric-note .tri{font-size:10px;line-height:1;}

/* ---------- compare table ---------- */
.compare-card{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius-large);
  box-shadow:var(--shadow-1);
  overflow:hidden;
}
.compare-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch;}
table.compare{width:100%;border-collapse:collapse;min-width:640px;}
table.compare th,table.compare td{
  padding:20px 24px;text-align:left;border-bottom:1px solid var(--line);
  font-size:15px;vertical-align:middle;
}
table.compare thead th{
  background:#fff;font-size:14px;font-weight:700;color:var(--ink);
  border-bottom:1px solid var(--line);white-space:nowrap;
}
table.compare thead th span{
  display:inline-block;font-size:12px;font-weight:600;color:var(--brand);
  background:var(--brand-soft);border-radius:999px;padding:3px 10px;margin-left:8px;
}
table.compare tbody tr:nth-child(even){background:var(--bg);}
table.compare tbody tr:last-child td{border-bottom:0;}
table.compare td.dim{color:var(--ink);font-weight:600;}
table.compare td.num{
  font-family:var(--font-num);font-variant-numeric:tabular-nums;
  text-align:right;white-space:nowrap;
}
table.compare td.num.positive{color:var(--jade);font-weight:700;}
table.compare td.num.negative{color:var(--warn);font-weight:700;}
table.compare td.num.neutral{color:var(--muted);}
.compare-foot{
  padding:18px 24px;background:var(--bg);border-top:1px solid var(--line);
  font-size:14px;color:var(--muted);
}

/* ---------- checklist ---------- */
.check-grid{display:grid;grid-template-columns:1fr;gap:var(--gap-l);}
@media (min-width:1024px){ .check-grid{grid-template-columns:5fr 7fr;gap:48px;} }
.num-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius-card);
  box-shadow:var(--shadow-1);padding:22px;margin-bottom:16px;
  display:flex;gap:16px;transition:transform .18s ease, border-color .18s ease, box-shadow .18s ease;
}
.num-card:last-child{margin-bottom:0;}
.num-card:hover{transform:translateY(-2px);border-color:var(--brand-soft);box-shadow:var(--shadow-2);}
.num-card .idx{
  font-family:var(--font-num);font-size:22px;font-weight:700;color:var(--brand);
  line-height:1.2;flex:0 0 44px;
}
.num-card h3{font-size:18px;font-weight:600;color:var(--ink);line-height:1.4;margin-bottom:6px;}
.num-card p{font-size:15px;color:var(--muted);}
.icon-rows{background:var(--card);border:1px solid var(--line);border-radius:var(--radius-large);box-shadow:var(--shadow-1);padding:8px 24px;}
.icon-row{
  display:flex;align-items:flex-start;gap:16px;padding:20px 0;border-bottom:1px solid var(--line);
}
.icon-row:last-child{border-bottom:0;}
.icon-row .ico{
  flex:0 0 40px;width:40px;height:40px;border-radius:10px;
  background:var(--brand-soft);color:var(--brand);
  display:inline-flex;align-items:center;justify-content:center;
}
.icon-row .ico svg{width:20px;height:20px;}
.icon-row h3{font-size:17px;font-weight:600;color:var(--ink);margin-bottom:4px;line-height:1.45;}
.icon-row p{font-size:15px;color:var(--muted);}

/* ---------- image feature ---------- */
.feature-band{
  display:grid;grid-template-columns:1fr;gap:var(--gap-l);
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius-large);
  box-shadow:var(--shadow-1);overflow:hidden;
}
@media (min-width:900px){ .feature-band{grid-template-columns:5fr 7fr;align-items:center;} }
.feature-band img{width:100%;height:100%;object-fit:cover;aspect-ratio:16/10;border-radius:0;}
.feature-body{padding:24px;}
@media (min-width:900px){ .feature-body{padding:40px 40px 40px 0;} }
.feature-body h3{font-size:20px;font-weight:600;color:var(--ink);margin-bottom:12px;line-height:1.4;}
.feature-body p{color:var(--muted);margin-bottom:16px;}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;}
.tag{
  display:inline-flex;align-items:center;height:28px;padding:0 12px;border-radius:999px;
  font-size:12px;font-weight:600;background:var(--bg);color:var(--muted);border:1px solid var(--line);
}
.tag.brand{background:var(--brand-soft);color:var(--brand-dark);border-color:transparent;}
.tag.jade{background:rgba(18,137,122,.1);color:var(--jade);border-color:transparent;}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:900px;}
.accordion{border:0;background:transparent;margin:0;}
.accordion .accordion-item{
  background:var(--card);border:1px solid var(--line);border-radius:12px;
  margin-bottom:12px;overflow:hidden;position:relative;
  transition:border-color .18s ease, box-shadow .18s ease;
}
.accordion .accordion-item:hover{box-shadow:var(--shadow-1);}
.accordion .accordion-item.is-active{border-color:var(--brand);}
.accordion .accordion-item.is-active::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--brand);
}
.accordion .accordion-title{
  display:block;padding:20px 56px 20px 24px;border:0;
  font-size:17px;font-weight:600;color:var(--ink);line-height:1.5;position:relative;
}
.accordion .accordion-title:hover{color:var(--brand-dark);background:transparent;}
.accordion .accordion-title::after{
  content:"";position:absolute;right:24px;top:50%;
  width:12px;height:12px;margin-top:-6px;
  border-right:1.5px solid var(--brand);border-bottom:1.5px solid var(--brand);
  transform:rotate(45deg);transition:transform .2s ease;
}
.accordion .accordion-item.is-active .accordion-title::after{transform:rotate(-135deg);}
.accordion .accordion-content{
  padding:0 24px 22px 24px;border:0;background:transparent;
  font-size:16px;color:var(--muted);line-height:1.85;
}
.accordion .accordion-content p{margin-bottom:10px;}
.accordion .accordion-content p:last-child{margin-bottom:0;}

/* ---------- CTA band ---------- */
.cta-band{
  background:var(--brand-soft);
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  padding:48px 0;
}
@media (min-width:1024px){ .cta-band{padding:64px 0;} }
.cta-inner{
  display:grid;grid-template-columns:1fr;gap:var(--gap-m);align-items:center;
}
@media (min-width:900px){ .cta-inner{grid-template-columns:1fr auto;gap:48px;} }
.cta-inner h2{font-size:clamp(22px,2.4vw,30px);font-weight:700;color:var(--ink);line-height:1.35;margin-bottom:10px;}
.cta-inner p{color:var(--muted);font-size:16px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;}

/* ---------- footer ---------- */
.site-footer{background:var(--ink-deep);color:rgba(255,255,255,.85);padding:64px 0 0;}
.footer-grid{
  display:grid;grid-template-columns:1fr;gap:var(--gap-l);
  padding-bottom:40px;
}
@media (min-width:768px){ .footer-grid{grid-template-columns:repeat(2,1fr);} }
@media (min-width:1024px){ .footer-grid{grid-template-columns:1.4fr 1fr 1fr 1.1fr;} }
.footer-brand .brand{margin-bottom:16px;}
.site-footer .brand-mark{background:rgba(232,84,31,.16);color:var(--brand);}
.site-footer .brand-text{color:#fff;}
.footer-brand p{font-size:14px;line-height:1.8;color:rgba(255,255,255,.7);max-width:320px;}
.footer-title{font-size:15px;font-weight:700;color:#fff;margin-bottom:16px;}
.footer-links li{margin-bottom:10px;}
.footer-links a,.footer-contact li{font-size:14px;color:rgba(255,255,255,.72);}
.footer-links a:hover{color:var(--brand);text-decoration:underline;text-underline-offset:3px;}
.footer-contact li{margin-bottom:10px;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);
  padding:20px 0 28px;
  display:flex;flex-wrap:wrap;gap:12px 24px;align-items:center;justify-content:space-between;
  font-size:14px;color:rgba(255,255,255,.62);
}
.footer-bottom .to-top{
  display:inline-flex;align-items:center;min-height:44px;color:rgba(255,255,255,.85);
}
.footer-bottom .to-top:hover{color:var(--brand);text-decoration:underline;text-underline-offset:3px;}

/* ---------- reveal ---------- */
.reveal-up{opacity:0;transform:translateY(14px);transition:opacity .5s ease, transform .5s ease;}
.reveal-up.is-visible{opacity:1;transform:none;}
@media (prefers-reduced-motion:reduce){
  .reveal-up{opacity:1;transform:none;transition:none;}
}