/* roulang page: index */
:root{
  --brand:#1F5C4E;
  --brand-600:#17473C;
  --brand-100:#E4EFEA;
  --accent:#C86A34;
  --accent-soft:#F6E7DC;
  --paper:#F7F4EE;
  --surface:#FFFFFF;
  --ink-900:#141917;
  --ink-700:#3A423F;
  --ink-500:#6B7570;
  --line:#E2DED4;
  --pos:#2E7D63;
  --neu:#8A918C;
  --r-card:14px;
  --r-img:12px;
  --r-btn:10px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(20,25,23,.04), 0 8px 24px -12px rgba(20,25,23,.10);
  --sh-2:0 16px 36px -16px rgba(20,25,23,.16);
  --serif:"Noto Serif SC","Source Han Serif SC","Songti SC",serif;
  --sans:"PingFang SC","Microsoft YaHei","Noto Sans SC","Helvetica Neue",Arial,sans-serif;
  --mono:ui-monospace,"SFMono-Regular","DIN Alternate",Menlo,Consolas,monospace;

  --bs-primary:#1F5C4E;
  --bs-body-bg:#F7F4EE;
  --bs-body-color:#3A423F;
  --bs-border-radius:14px;
  --bs-body-font-family:var(--sans);
  --bs-link-color:#1F5C4E;
  --bs-link-hover-color:#17473C;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink-700);
  font-family:var(--sans);
  font-size:16px;
  line-height:1.9;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{font-family:var(--serif);color:var(--ink-900);font-weight:600;letter-spacing:.01em;line-height:1.35;margin:0}
p{margin:0 0 1.4em}
a{color:var(--brand);text-decoration:none;transition:color .18s ease,border-color .18s ease}
a:hover{color:var(--brand-600)}
img{max-width:100%;display:block}
button,input,select,textarea{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.container{max-width:1320px;padding-left:20px;padding-right:20px;margin:0 auto}
@media(min-width:992px){.container{padding-left:32px;padding-right:32px}}

/* ============ Header / Nav ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:var(--paper);
  border-bottom:1px solid var(--line);
}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:64px}
@media(min-width:992px){.nav-inner{height:72px}}
.logo{display:inline-flex;align-items:center;gap:10px;font-family:var(--serif);font-size:19px;font-weight:600;color:var(--ink-900);letter-spacing:.01em}
.logo:hover{color:var(--brand)}
.logo .seal{width:8px;height:8px;background:var(--brand);display:inline-block;flex:0 0 auto}
.nav-links{display:none;align-items:center;gap:28px}
@media(min-width:992px){.nav-links{display:flex}}
.nav-link-x{
  position:relative;font-size:15px;font-weight:500;color:var(--ink-700);
  padding:6px 0;border-bottom:2px solid transparent;
}
.nav-link-x:hover{color:var(--brand);border-bottom-color:var(--brand);padding-bottom:8px}
.nav-link-x.active{color:var(--brand);border-bottom-color:var(--brand);padding-bottom:8px}
.nav-side{display:flex;align-items:center;gap:14px}
.icon-btn{
  width:38px;height:38px;border:1px solid var(--line);border-radius:var(--r-pill);
  background:transparent;display:none;align-items:center;justify-content:center;cursor:pointer;
  transition:border-color .18s ease,background .18s ease;
}
.icon-btn:hover{border-color:var(--brand);background:var(--brand-100)}
@media(min-width:992px){.icon-btn{display:inline-flex}}
.nav-toggle{
  width:40px;height:40px;border:1px solid var(--line);background:transparent;border-radius:var(--r-pill);
  display:inline-flex;flex-direction:column;justify-content:center;align-items:center;gap:5px;cursor:pointer;
}
.nav-toggle span{display:block;width:17px;height:1px;background:var(--ink-900);transition:transform .2s ease,opacity .2s ease}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(3px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){transform:translateY(-3px) rotate(-45deg)}
@media(min-width:992px){.nav-toggle{display:none}}
.drawer{
  position:fixed;inset:64px 0 0 0;background:var(--paper);z-index:55;
  padding:8px 20px 32px;overflow-y:auto;
  transform:translateY(-8px);opacity:0;visibility:hidden;transition:opacity .2s ease,transform .2s ease,visibility .2s;
}
.drawer.open{opacity:1;visibility:visible;transform:translateY(0)}
.drawer a.d-link{display:block;font-size:20px;font-weight:500;color:var(--ink-900);padding:18px 2px;border-bottom:1px solid var(--line)}
.drawer a.d-link:hover{color:var(--brand)}
.drawer .d-cta{margin-top:28px;display:block;text-align:center}
@media(min-width:992px){.drawer{display:none}}

/* ============ Buttons ============ */
.btn-x{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--r-btn);padding:14px 28px;font-size:15px;font-weight:600;
  border:1px solid transparent;cursor:pointer;transition:all .18s ease;text-align:center;
}
.btn-solid{background:var(--brand);color:#fff}
.btn-solid:hover{background:var(--brand-600);color:#fff;transform:translateY(-1px)}
.btn-ghost{background:transparent;color:var(--ink-900);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);background:var(--brand-100)}
.btn-sm{padding:10px 20px;font-size:14px}

/* ============ Hero ============ */
.hero{
  position:relative;
  padding:56px 0 64px;
  background-color:var(--paper);
  background-image:linear-gradient(to right,rgba(226,222,212,.55) 1px,transparent 1px),linear-gradient(to bottom,rgba(226,222,212,.55) 1px,transparent 1px);
  background-size:56px 56px;
  border-bottom:1px solid var(--line);
}
@media(min-width:992px){.hero{padding:88px 0 96px}}
.hero-grid{display:grid;grid-template-columns:1fr;gap:36px;align-items:center}
@media(min-width:992px){.hero-grid{grid-template-columns:7fr 5fr;gap:56px}}
.hero-kicker{display:inline-flex;align-items:center;gap:9px;font-size:13px;color:var(--ink-500);letter-spacing:.06em;margin-bottom:20px}
.hero-kicker i{width:8px;height:8px;background:var(--accent);display:inline-block}
.hero h1{font-size:clamp(30px,4.4vw,52px);margin-bottom:22px}
.hero .lead{font-size:17px;color:var(--ink-700);max-width:58ch;margin-bottom:30px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:30px}
.tag-row{display:flex;flex-wrap:wrap;gap:10px}
.tag{
  display:inline-block;font-size:13px;color:var(--ink-500);
  border:1px solid var(--line);border-radius:var(--r-pill);padding:6px 14px;background:rgba(255,255,255,.65);
}
.hero-media{position:relative}
.hero-media .frame{
  border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;background:var(--surface);box-shadow:var(--sh-1);
}
.hero-media img{width:100%;height:300px;object-fit:cover}
@media(min-width:992px){.hero-media img{height:420px}}
.hero-note{
  margin-top:16px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:18px 20px;box-shadow:var(--sh-1);
}
.hero-note dl{display:grid;grid-template-columns:auto 1fr;gap:8px 14px;margin:0;font-size:14px}
.hero-note dt{font-family:var(--mono);color:var(--ink-500);font-size:12px;letter-spacing:.06em;align-self:center}
.hero-note dd{margin:0;color:var(--ink-900)}

/* ============ Section shell ============ */
.section{padding:56px 0}
@media(min-width:992px){.section{padding:100px 0}}
.section-head{max-width:780px;margin-bottom:40px}
@media(min-width:992px){.section-head{margin-bottom:56px}}
.sec-title{position:relative;font-size:clamp(26px,3vw,34px);padding-left:16px;margin-bottom:16px}
.sec-title::before{content:"";position:absolute;left:0;top:.22em;bottom:.22em;width:4px;background:var(--brand);border-radius:2px}
.sec-desc{color:var(--ink-500);font-size:16px;margin:0;max-width:70ch}
.eyebrow{font-family:var(--mono);font-size:12px;letter-spacing:.12em;color:var(--ink-500);margin-bottom:12px;display:block}

/* ============ Metrics ============ */
.metrics{
  display:grid;grid-template-columns:1fr 1fr;
  border:1px solid var(--line);border-radius:var(--r-card);background:var(--surface);overflow:hidden;box-shadow:var(--sh-1);
}
@media(min-width:992px){.metrics{grid-template-columns:repeat(4,1fr)}}
.metric{padding:26px 22px;border-right:0;border-bottom:1px solid var(--line)}
.metric:nth-child(2n){border-right:0}
@media(max-width:991px){
  .metric:nth-child(odd){border-right:1px solid var(--line)}
  .metric:nth-child(3),.metric:nth-child(4){border-bottom:0}
}
@media(min-width:992px){
  .metric{border-bottom:0;border-right:1px solid var(--line)}
  .metric:last-child{border-right:0}
}
.metric .bar-top{width:34px;height:2px;background:var(--brand);margin-bottom:18px}
.metric .num{font-family:var(--mono);font-variant-numeric:tabular-nums;font-weight:600;font-size:38px;line-height:1.1;color:var(--ink-900);display:block}
.metric .num small{font-size:15px;font-weight:500;margin-left:4px;color:var(--ink-700)}
.metric .label{display:block;font-size:13px;letter-spacing:.08em;color:var(--ink-500);margin-top:8px}
.metric .foot{display:block;font-size:12px;color:var(--ink-500);margin-top:10px;line-height:1.7}

/* ============ Matrix ============ */
.matrix{display:grid;grid-template-columns:1fr;gap:0}
@media(min-width:768px){.matrix{grid-template-columns:1fr 1fr}}
@media(min-width:1200px){.matrix{grid-template-columns:repeat(3,1fr)}}
.matrix-item{
  display:block;border-top:1px solid var(--line);padding:26px 20px 30px;color:inherit;
  transition:background .2s ease;
}
@media(min-width:768px){.matrix-item{padding:28px 26px 34px}}
.matrix-item:hover{background:var(--brand-100);color:inherit}
.matrix-num{font-family:var(--mono);font-size:12px;letter-spacing:.1em;color:var(--ink-500);display:block;margin-bottom:14px;transition:color .2s ease}
.matrix-item:hover .matrix-num{color:var(--accent)}
.matrix-title{font-size:19px;margin-bottom:10px}
.matrix-desc{font-size:14px;color:var(--ink-500);margin:0 0 16px;line-height:1.85}
.matrix-arrow{display:inline-flex;align-items:center;gap:6px;font-size:13px;color:var(--brand);transition:transform .2s ease}
.matrix-item:hover .matrix-arrow{transform:translateX(4px)}

/* ============ Compare ============ */
.compare{
  display:grid;grid-template-columns:1fr;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-1);
}
@media(min-width:992px){.compare{grid-template-columns:1fr 1fr}}
.compare-col{padding:28px 24px 32px}
@media(min-width:992px){.compare-col{padding:36px 34px 40px}}
.compare-col + .compare-col{border-top:1px solid var(--line)}
@media(min-width:992px){.compare-col + .compare-col{border-top:0;border-left:1px solid var(--line)}}
.compare-head{display:flex;align-items:center;gap:10px;font-family:var(--serif);font-size:18px;font-weight:600;color:var(--ink-900);margin-bottom:6px}
.compare-head .dot{width:8px;height:8px;background:var(--line)}
.compare-col.is-brand .compare-head .dot{background:var(--brand)}
.compare-sub{font-size:13px;color:var(--ink-500);margin-bottom:26px}
.compare-row{margin-bottom:22px}
.compare-row:last-child{margin-bottom:0}
.compare-row .row-top{display:flex;justify-content:space-between;gap:12px;font-size:14px;margin-bottom:9px}
.compare-row .row-val{font-family:var(--mono);font-variant-numeric:tabular-nums;font-size:14px;color:var(--ink-900)}
.compare-col:not(.is-brand) .row-val{color:var(--ink-500)}
.track{height:8px;border-radius:var(--r-pill);background:var(--paper);overflow:hidden}
.track span{display:block;height:100%;border-radius:var(--r-pill)}
.track.plain span{background:var(--line)}
.track.strong span{background:var(--brand)}

/* ============ News / CMS ============ */
.news-grid{display:grid;grid-template-columns:1fr;gap:24px}
@media(min-width:768px){.news-grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:992px){.news-grid{grid-template-columns:repeat(3,1fr)}}
.news-card{
  display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-1);transition:box-shadow .2s ease,transform .2s ease;
}
.news-card:hover{box-shadow:var(--sh-2);transform:translateY(-2px)}
.news-cover{width:100%;aspect-ratio:16/9;object-fit:cover;background:var(--paper);border-bottom:1px solid var(--line)}
.news-body{padding:20px 22px 22px;display:flex;flex-direction:column;flex:1}
.news-badge{
  align-self:flex-start;font-size:12px;color:var(--brand);border:1px solid var(--brand);
  border-radius:var(--r-pill);padding:3px 12px;margin-bottom:14px;background:rgba(228,239,234,.4);
}
.news-title{font-size:18px;line-height:1.5;margin-bottom:10px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-title a{color:var(--ink-900)}
.news-title a:hover{color:var(--brand)}
.news-desc{
  font-size:14px;color:var(--ink-500);line-height:1.8;margin:0 0 18px;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.news-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:12px;border-top:1px solid var(--line);padding-top:14px}
.news-date{font-family:var(--mono);font-size:12px;color:var(--ink-500)}
.news-more{font-size:13px;color:var(--brand);display:inline-flex;align-items:center;gap:6px;transition:transform .2s ease}
.news-card:hover .news-more{transform:translateX(4px)}
.news-empty{
  border:1px dashed var(--line);border-radius:var(--r-card);background:var(--surface);
  min-height:150px;max-height:220px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;
  color:var(--ink-500);font-size:15px;padding:28px;
}
.news-empty a{font-size:14px;border-bottom:1px dashed var(--brand)}
.news-empty a:hover{border-bottom-style:solid}

/* ============ FAQ ============ */
.faq-list{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  width:100%;background:transparent;border:0;text-align:left;cursor:pointer;
  padding:22px 40px 22px 0;position:relative;font-size:17px;font-weight:600;color:var(--ink-900);
  font-family:var(--sans);line-height:1.6;
}
.faq-q:hover{color:var(--brand)}
.faq-icon{position:absolute;right:2px;top:50%;width:16px;height:16px;transform:translateY(-50%)}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:var(--brand);transition:transform .18s ease,opacity .18s ease;
}
.faq-icon::before{left:0;top:7.5px;width:16px;height:1px}
.faq-icon::after{top:0;left:7.5px;width:1px;height:16px}
.faq-item.open .faq-icon::after{transform:rotate(90deg);opacity:0}
.faq-a{max-height:0;overflow:hidden;transition:max-height .28s ease}
.faq-a-inner{max-width:72ch;padding:0 24px 26px 0;color:var(--ink-700);font-size:15px;line-height:1.9}
.faq-a-inner p:last-child{margin-bottom:0}

/* ============ Contact ============ */
.contact-wrap{
  display:grid;grid-template-columns:1fr;gap:36px;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--r-card);padding:30px 24px;box-shadow:var(--sh-1);
}
@media(min-width:992px){.contact-wrap{grid-template-columns:5fr 7fr;gap:56px;padding:48px}}
.contact-list{list-style:none;padding:0;margin:26px 0 0}
.contact-list li{display:flex;gap:16px;border-top:1px solid var(--line);padding:14px 0;font-size:15px}
.contact-list li:last-child{border-bottom:1px solid var(--line)}
.contact-list .k{font-family:var(--mono);font-size:12px;letter-spacing:.08em;color:var(--ink-500);min-width:82px;padding-top:3px}
.field{margin-bottom:18px}
.field label{display:block;font-size:14px;color:var(--ink-700);margin-bottom:8px}
.field input,.field select,.field textarea{
  width:100%;background:var(--surface);border:1px solid var(--line);border-radius:10px;
  padding:13px 16px;font-size:15px;color:var(--ink-900);transition:border-color .18s ease,box-shadow .18s ease;
}
.field textarea{min-height:120px;resize:vertical;line-height:1.8}
.field input::placeholder,.field textarea::placeholder{color:var(--ink-500)}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--brand);box-shadow:0 0 0 2px var(--brand-100);
}
.field input:focus-visible,.field select:focus-visible,.field textarea:focus-visible{outline:2px solid var(--accent);outline-offset:1px}
.form-grid{display:grid;grid-template-columns:1fr;gap:0 20px}
@media(min-width:768px){.form-grid{grid-template-columns:1fr 1fr}}
.form-grid .span-2{grid-column:1/-1}
.form-note{font-size:13px;color:var(--ink-500);margin:14px 0 0}
.form-msg{display:none;margin-top:16px;font-size:14px;color:var(--pos);border-left:3px solid var(--pos);padding:6px 0 6px 14px;background:var(--brand-100)}
.form-msg.show{display:block}

/* ============ Footer ============ */
.site-footer{background:var(--ink-900);color:#EDEAE3;margin-top:0}
.footer-grid{
  display:grid;grid-template-columns:1fr;gap:0;
  padding:52px 0 40px;
}
@media(min-width:768px){.footer-grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:992px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1fr;gap:0}
}
.footer-col{padding:22px 0;border-top:1px solid rgba(255,255,255,.12)}
@media(min-width:992px){
  .footer-col{border-top:0;padding:0 26px}
  .footer-col:first-child{padding-left:0}
  .footer-col + .footer-col{border-left:1px solid rgba(255,255,255,.12)}
}
.footer-brand{font-family:var(--serif);font-size:19px;font-weight:600;color:#fff;display:inline-flex;align-items:center;gap:10px;margin-bottom:14px}
.footer-brand .seal{width:8px;height:8px;background:var(--accent)}
.footer-about{font-size:14px;line-height:2;color:rgba(237,234,227,.72);margin:0}
.footer-col h4{color:#fff;font-size:15px;margin-bottom:14px;font-family:var(--sans);font-weight:600}
.footer-col ul{list-style:none;padding:0;margin:0}
.footer-col li{margin-bottom:2px}
.footer-col a{font-size:14px;color:rgba(237,234,227,.72);line-height:2;border-bottom:1px solid transparent}
.footer-col a:hover{color:#fff;border-bottom-color:rgba(255,255,255,.5)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);padding:20px 0;display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;font-size:13px;color:rgba(237,234,227,.55)}
.footer-bottom a{color:rgba(237,234,227,.55)}
.footer-bottom a:hover{color:#fff}

/* misc */
.divider-line{height:1px;background:var(--line);border:0;margin:0}
.link-dash{border-bottom:1px dashed var(--brand);color:var(--brand)}
.link-dash:hover{border-bottom-style:solid;color:var(--brand-600)}

/* roulang page: article */
:root{
  --brand:#1F5C4E;--brand-600:#17473C;--brand-100:#E4EFEA;
  --accent:#C86A34;--accent-soft:#F6E7DC;
  --paper:#F7F4EE;--surface:#FFFFFF;
  --ink-900:#141917;--ink-700:#3A423F;--ink-500:#6B7570;--line:#E2DED4;
  --pos:#2E7D63;--neutral:#8A918C;
  --r-card:14px;--r-img:12px;--r-btn:10px;--r-pill:999px;
  --sh-1:0 1px 2px rgba(20,25,23,.04),0 8px 24px -12px rgba(20,25,23,.10);
  --sh-2:0 16px 36px -16px rgba(20,25,23,.16);
  --serif:"Noto Serif SC","Source Han Serif SC",Georgia,serif;
  --sans:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  --mono:ui-monospace,"SFMono-Regular",Menlo,Consolas,"DIN Alternate",monospace;
  --bs-primary:#1F5C4E;--bs-body-bg:#F7F4EE;--bs-body-color:#3A423F;
  --bs-border-radius:14px;--bs-body-font-family:var(--sans);
  --bs-link-color:#1F5C4E;--bs-link-hover-color:#17473C;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--paper);color:var(--ink-700);font-family:var(--sans);
  font-size:16px;line-height:1.9;font-weight:400;
  background-image:linear-gradient(rgba(226,222,212,.35) 1px,transparent 1px),linear-gradient(90deg,rgba(226,222,212,.35) 1px,transparent 1px);
  background-size:64px 64px;background-position:-1px -1px;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--brand);text-decoration:none;transition:color .18s ease,border-color .18s ease}
a:hover{color:var(--brand-600)}
h1,h2,h3,h4{font-family:var(--serif);color:var(--ink-900);font-weight:600;letter-spacing:.01em;line-height:1.35;margin:0}
p{margin:0 0 1.4em}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:4px}
.container-x{width:100%;max-width:1320px;margin:0 auto;padding-left:20px;padding-right:20px}
@media(min-width:992px){.container-x{padding-left:32px;padding-right:32px}}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:70;background:var(--paper);border-bottom:1px solid var(--line)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:64px}
@media(min-width:992px){.header-inner{height:72px}}
.brand{display:inline-flex;align-items:center;gap:10px;font-family:var(--serif);font-weight:600;font-size:19px;color:var(--ink-900);letter-spacing:.01em}
.brand:hover{color:var(--brand)}
.seal{width:8px;height:8px;background:var(--brand);display:inline-block;flex:none}
.seal-line{width:10px;height:10px;border:2px solid var(--brand);display:inline-block;flex:none}
.nav-links{display:none}
@media(min-width:992px){
  .nav-links{display:flex;align-items:center;gap:30px}
  .nav-link-x{position:relative;font-size:15px;font-weight:500;color:var(--ink-700);padding:6px 0}
  .nav-link-x::after{content:"";position:absolute;left:0;right:0;bottom:-4px;height:2px;background:var(--brand);transform:scaleX(0);transform-origin:left;transition:transform .18s ease}
  .nav-link-x:hover{color:var(--brand)}
  .nav-link-x:hover::after{transform:scaleX(1)}
  .nav-link-x.active{color:var(--brand)}
  .nav-link-x.active::after{transform:scaleX(1)}
}
.nav-toggle{display:inline-flex;flex-direction:column;justify-content:center;gap:6px;width:44px;height:44px;padding:0 10px;background:transparent;border:1px solid var(--line);border-radius:var(--r-btn);cursor:pointer}
.nav-toggle span{display:block;height:1px;background:var(--ink-900);width:100%}
@media(min-width:992px){.nav-toggle{display:none}}
.drawer{position:fixed;left:0;right:0;top:64px;bottom:0;background:var(--paper);z-index:65;display:none;overflow-y:auto;padding:8px 20px 40px}
.drawer.open{display:block}
.drawer a.drawer-link{display:block;font-family:var(--serif);font-size:20px;color:var(--ink-900);padding:18px 0;border-bottom:1px solid var(--line)}
.drawer .btn-solid{margin-top:26px;display:inline-flex}

/* ---------- buttons / tags ---------- */
.btn-x{display:inline-flex;align-items:center;gap:8px;font-size:15px;font-weight:500;padding:14px 28px;border-radius:var(--r-btn);border:1px solid transparent;cursor:pointer;transition:background .18s ease,color .18s ease,transform .18s ease,border-color .18s ease}
.btn-solid{background:var(--brand);color:#fff}
.btn-solid:hover{background:var(--brand-600);color:#fff;transform:translateY(-1px)}
.btn-ghost{background:transparent;color:var(--brand);border-color:var(--brand)}
.btn-ghost:hover{background:var(--brand-100);color:var(--brand-600)}
.tag-x{display:inline-flex;align-items:center;padding:5px 14px;border:1px solid var(--line);border-radius:var(--r-pill);font-size:13px;color:var(--ink-500);background:var(--surface)}
.tag-brand{display:inline-flex;align-items:center;padding:5px 14px;border:1px solid var(--brand);border-radius:var(--r-pill);font-size:13px;color:var(--brand);background:transparent}

/* ---------- article head ---------- */
.crumbs{font-size:14px;color:var(--ink-500);padding:26px 0 0}
.crumbs a{color:var(--ink-500)}
.crumbs a:hover{color:var(--brand)}
.crumbs .sep{margin:0 8px;color:var(--line)}
.crumbs .cur{color:var(--ink-700)}
.article-head{max-width:820px;margin:0 auto;padding:30px 0 34px;border-bottom:1px solid var(--line)}
.article-head h1{font-size:clamp(26px,3.4vw,40px);margin:18px 0 18px}
.meta-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-family:var(--mono);font-size:13px;color:var(--ink-500);font-variant-numeric:tabular-nums}
.meta-row .dot{width:3px;height:3px;border-radius:50%;background:var(--line)}
.lead{max-width:820px;margin:22px auto 0;font-size:17px;color:var(--ink-700)}

/* ---------- prose ---------- */
.article-body{max-width:820px;margin:0 auto;padding:40px 0 8px}
.prose{font-size:17px;color:var(--ink-700)}
.prose>*:first-child{margin-top:0}
.prose h2{font-size:30px;margin:2.2em 0 .7em;padding-left:14px;border-left:4px solid var(--brand)}
.prose h3{font-size:22px;margin:1.9em 0 .6em}
.prose h4{font-size:18px;margin:1.6em 0 .5em}
.prose p{margin:0 0 1.4em}
.prose ul,.prose ol{margin:0 0 1.4em;padding-left:0;list-style:none}
.prose li{position:relative;padding-left:20px;margin-bottom:.6em}
.prose li::before{content:"";position:absolute;left:0;top:.68em;width:6px;height:6px;background:var(--brand)}
.prose ol{counter-reset:li}
.prose ol li::before{counter-increment:li;content:counter(li,decimal-leading-zero);background:none;width:auto;height:auto;top:0;font-family:var(--mono);font-size:13px;color:var(--ink-500)}
.prose blockquote{margin:1.8em 0;padding:20px 24px;background:var(--paper);border-left:3px solid var(--accent);border-radius:0 var(--r-card) var(--r-card) 0;color:var(--ink-700)}
.prose blockquote p:last-child{margin-bottom:0}
.prose img{border-radius:var(--r-img);border:1px solid var(--line);margin:1.6em 0 .6em}
.prose a{border-bottom:1px dashed var(--brand);color:var(--brand)}
.prose a:hover{border-bottom-style:solid;color:var(--brand-600)}
.prose table{width:100%;border-collapse:collapse;margin:1.6em 0;font-size:15px}
.prose th,.prose td{border-bottom:1px solid var(--line);padding:12px 10px;text-align:left}
.prose th{color:var(--ink-900);font-weight:600;background:var(--brand-100)}
.prose code{font-family:var(--mono);font-size:14px;background:var(--brand-100);padding:2px 6px;border-radius:6px;color:var(--brand-600)}
.prose figcaption{font-size:13px;color:var(--ink-500);text-align:center;margin-bottom:1.6em}
.prose hr{border:0;border-top:1px solid var(--line);margin:2.4em 0}

.notice{display:flex;gap:14px;align-items:flex-start;border:1px solid var(--line);background:var(--surface);border-radius:var(--r-card);padding:18px 20px;margin:0 auto 34px;max-width:820px;box-shadow:var(--sh-1)}
.notice .mark{width:8px;height:8px;background:var(--accent);margin-top:9px;flex:none}
.notice p{margin:0;font-size:15px;color:var(--ink-700)}

.empty-state{max-width:820px;margin:0 auto;border:1px dashed var(--line);border-radius:var(--r-card);padding:38px 24px;text-align:center;background:var(--surface)}
.empty-state p{color:var(--ink-500);margin-bottom:18px}

/* ---------- related ---------- */
.related{max-width:820px;margin:0 auto;padding:56px 0 0}
.related h2{font-size:24px;padding-left:14px;border-left:4px solid var(--brand);margin-bottom:8px}
.related .hint{font-size:14px;color:var(--ink-500);margin:0 0 24px}
.rel-grid{display:grid;grid-template-columns:1fr;gap:20px}
@media(min-width:768px){.rel-grid{grid-template-columns:1fr 1fr}}
.rel-card{display:block;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-1);transition:box-shadow .2s ease,transform .2s ease}
.rel-card:hover{box-shadow:var(--sh-2);transform:translateY(-2px)}
.rel-card img{aspect-ratio:16/9;object-fit:cover;width:100%;border-radius:0;border:0}
.rel-card .rel-body{padding:18px 20px 20px}
.rel-card h3{font-size:18px;margin:10px 0 8px}
.rel-card p{font-size:14px;color:var(--ink-500);margin:0;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.back-row{max-width:820px;margin:36px auto 0;display:flex;flex-wrap:wrap;gap:14px}

/* ---------- footer ---------- */
.site-footer{background:var(--ink-900);color:#EDEAE3;margin-top:96px;padding:72px 0 26px}
.footer-grid{display:grid;grid-template-columns:1fr;gap:36px}
@media(min-width:768px){.footer-grid{grid-template-columns:1fr 1fr}}
@media(min-width:992px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1fr;gap:0}
  .footer-col{padding:0 28px;border-left:1px solid rgba(255,255,255,.12)}
  .footer-col:first-child{padding-left:0;border-left:0}
  .footer-col:last-child{padding-right:0}}
.footer-brand{display:inline-flex;align-items:center;gap:10px;font-family:var(--serif);font-size:19px;font-weight:600;color:#fff}
.footer-brand .seal{background:#fff}
.footer-about{font-size:14px;line-height:2;color:rgba(237,234,227,.66);margin:16px 0 0;max-width:34ch}
.site-footer h4{font-size:14px;color:#fff;font-weight:600;letter-spacing:.06em;margin:0 0 14px;font-family:var(--sans)}
.site-footer ul{list-style:none;margin:0;padding:0}
.site-footer li{margin-bottom:6px}
.site-footer li a{font-size:14px;line-height:2;color:rgba(237,234,227,.72)}
.site-footer li a:hover{color:#fff}
.footer-bottom{margin-top:48px;padding-top:20px;border-top:1px solid rgba(255,255,255,.12);display:flex;flex-direction:column;gap:8px;font-size:13px;color:rgba(237,234,227,.5)}
@media(min-width:768px){.footer-bottom{flex-direction:row;justify-content:space-between;align-items:center}}
@media(max-width:991px){.nav-links{display:none}}

/* roulang page: category1 */
:root{
  --brand:#1F5C4E;
  --brand-600:#17473C;
  --brand-100:#E4EFEA;
  --accent:#C86A34;
  --accent-soft:#F6E7DC;
  --paper:#F7F4EE;
  --surface:#FFFFFF;
  --ink-900:#141917;
  --ink-700:#3A423F;
  --ink-500:#6B7570;
  --line:#E2DED4;
  --pos:#2E7D63;
  --neutral:#8A918C;
  --radius-card:14px;
  --radius-img:12px;
  --radius-btn:10px;
  --radius-pill:999px;
  --shadow-1:0 1px 2px rgba(20,25,23,.04),0 8px 24px -12px rgba(20,25,23,.10);
  --shadow-2:0 16px 36px -16px rgba(20,25,23,.16);
  --font-serif:"Noto Serif SC","Source Han Serif SC","Songti SC",serif;
  --font-sans:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:ui-monospace,"SFMono-Regular","DIN Alternate",Menlo,Consolas,monospace;
  --bs-primary:#1F5C4E;
  --bs-body-bg:#F7F4EE;
  --bs-body-color:#3A423F;
  --bs-border-radius:14px;
  --bs-body-font-family:var(--font-sans);
  --bs-link-color:#1F5C4E;
  --bs-link-hover-color:#17473C;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink-700);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.9;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;}
a{color:var(--brand);text-decoration:none;transition:color .18s ease,border-color .18s ease;}
a:hover{color:var(--brand-600);}
button{font-family:inherit;}
h1,h2,h3,h4{font-family:var(--font-serif);color:var(--ink-900);font-weight:600;letter-spacing:.01em;line-height:1.35;margin:0;}
p{margin:0 0 1.4em;}
p:last-child{margin-bottom:0;}
ul{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;}

.container{
  width:100%;
  max-width:1320px;
  margin-inline:auto;
  padding-inline:20px;
}
@media (min-width:992px){
  .container{padding-inline:32px;}
}
@media (min-width:1400px){
  .container{max-width:1320px;}
}

/* ---------- header ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:var(--paper);
  border-bottom:1px solid var(--line);
}
.nav-inner{
  height:72px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
}
.logo{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-size:19px;
  font-weight:600;
  color:var(--ink-900);
  letter-spacing:.01em;
  font-family:var(--font-serif);
}
.logo:hover{color:var(--brand);}
.seal{
  width:8px;
  height:8px;
  background:var(--brand);
  display:inline-block;
  border-radius:2px;
  flex:0 0 auto;
}
.nav-links{
  display:flex;
  align-items:center;
  gap:34px;
}
.nav-link-x{
  position:relative;
  font-size:15px;
  font-weight:500;
  color:var(--ink-700);
  padding:6px 0;
  white-space:nowrap;
}
.nav-link-x::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  bottom:-2px;
  height:2px;
  background:var(--brand);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .18s ease;
  border-radius:2px;
}
.nav-link-x:hover{color:var(--brand);}
.nav-link-x:hover::after{transform:scaleX(1);}
.nav-link-x.active{color:var(--brand);}
.nav-link-x.active::after{transform:scaleX(1);}

.nav-toggle{
  display:none;
  width:44px;
  height:44px;
  border:1px solid var(--line);
  border-radius:var(--radius-btn);
  background:var(--surface);
  align-items:center;
  justify-content:center;
  flex-direction:column;
  gap:6px;
  cursor:pointer;
  transition:border-color .18s ease,background .18s ease;
}
.nav-toggle span{
  display:block;
  width:18px;
  height:1px;
  background:var(--ink-900);
  transition:transform .2s ease,opacity .2s ease;
}
.nav-toggle:hover{border-color:var(--brand);}
.nav-toggle[aria-expanded="true"] span:first-child{transform:translateY(3.5px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] span:last-child{transform:translateY(-3.5px) rotate(-45deg);}

.mobile-drawer{
  display:none;
  position:fixed;
  inset:64px 0 0 0;
  background:var(--paper);
  z-index:55;
  padding:24px 20px 40px;
  overflow-y:auto;
}
.mobile-drawer.open{display:block;}
.mobile-drawer a.m-drawer-link{
  display:block;
  font-size:20px;
  color:var(--ink-900);
  padding:18px 0;
  border-bottom:1px solid var(--line);
  font-family:var(--font-serif);
}
.mobile-drawer a.m-drawer-link.active{color:var(--brand);}
.mobile-drawer .drawer-cta{
  margin-top:28px;
  display:block;
  text-align:center;
}

@media (max-width:991.98px){
  .nav-inner{height:64px;}
  .nav-links{display:none;}
  .nav-toggle{display:inline-flex;}
}

/* ---------- buttons ---------- */
.btn-x{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:14px 28px;
  border-radius:var(--radius-btn);
  font-size:15px;
  font-weight:600;
  border:1px solid transparent;
  cursor:pointer;
  transition:background .18s ease,color .18s ease,border-color .18s ease,transform .18s ease,box-shadow .18s ease;
  text-align:center;
}
.btn-solid{background:var(--brand);color:#fff;}
.btn-solid:hover{background:var(--brand-600);color:#fff;transform:translateY(-1px);box-shadow:var(--shadow-1);}
.btn-ghost{background:transparent;color:var(--brand);border-color:var(--line);}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand-600);background:var(--brand-100);transform:translateY(-1px);}
.btn-sm{padding:10px 20px;font-size:14px;}

/* ---------- breadcrumb ---------- */
.crumb-bar{padding:22px 0 0;}
.crumb{
  font-size:14px;
  color:var(--ink-500);
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
}
.crumb a{color:var(--ink-500);}
.crumb a:hover{color:var(--brand);}
.crumb .sep{color:var(--line);}
.crumb .now{color:var(--ink-700);}

/* ---------- page hero ---------- */
.page-hero{padding:36px 0 64px;}
.hero-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:32px;
  align-items:start;
}
@media (min-width:992px){
  .hero-grid{grid-template-columns:7fr 5fr;gap:48px;}
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  letter-spacing:.08em;
  color:var(--ink-500);
  margin-bottom:18px;
}
.eyebrow .dot{width:8px;height:8px;background:var(--accent);border-radius:2px;display:inline-block;}
.page-hero h1{
  font-size:clamp(30px,4.4vw,46px);
  margin-bottom:20px;
}
.hero-lead{
  font-size:17px;
  color:var(--ink-700);
  max-width:62ch;
  margin-bottom:26px;
}
.tag-row{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:28px;}
.tag-x{
  display:inline-flex;
  align-items:center;
  padding:6px 14px;
  font-size:13px;
  color:var(--ink-500);
  border:1px solid var(--line);
  border-radius:var(--radius-pill);
  background:transparent;
}
.hero-media{
  border-radius:var(--radius-card);
  overflow:hidden;
  border:1px solid var(--line);
  background:var(--paper);
  box-shadow:var(--shadow-1);
}
.hero-media img{
  width:100%;
  aspect-ratio:4/3;
  object-fit:cover;
  border-radius:var(--radius-card);
}
.media-cap{
  font-size:13px;
  color:var(--ink-500);
  text-align:center;
  padding:12px 16px 0;
  margin:0;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;}

/* ---------- section base ---------- */
.section{padding:72px 0;}
@media (min-width:992px){
  .section{padding:104px 0;}
}
.section-tight{padding-top:0;}
.sec-head{max-width:760px;margin-bottom:44px;}
.sec-head h2{
  font-size:clamp(26px,3vw,34px);
  position:relative;
  padding-left:18px;
  margin-bottom:16px;
}
.sec-head h2::before{
  content:"";
  position:absolute;
  left:0;
  top:.28em;
  bottom:.28em;
  width:3px;
  background:var(--brand);
  border-radius:2px;
}
.sec-head p{color:var(--ink-500);font-size:16px;margin:0;}

/* ---------- layout with side anchor ---------- */
.with-anchor{
  display:grid;
  grid-template-columns:1fr;
  gap:40px;
}
@media (min-width:992px){
  .with-anchor{grid-template-columns:minmax(0,1fr) 280px;gap:56px;align-items:start;}
}
.anchor-panel{
  border:1px solid var(--line);
  background:var(--surface);
  border-radius:var(--radius-card);
  padding:22px 22px 18px;
  box-shadow:var(--shadow-1);
}
@media (min-width:992px){
  .anchor-panel{position:sticky;top:96px;}
}
.anchor-panel h3{font-size:16px;margin-bottom:6px;}
.anchor-panel .anchor-hint{font-size:13px;color:var(--ink-500);margin-bottom:14px;}
.anchor-list li + li{border-top:1px solid var(--line);}
.anchor-list a{
  display:flex;
  gap:12px;
  align-items:baseline;
  padding:12px 0;
  font-size:14px;
  color:var(--ink-700);
}
.anchor-list a:hover{color:var(--brand);}
.anchor-list .num{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-size:12px;
  color:var(--ink-500);
  flex:0 0 auto;
}
.anchor-list a:hover .num{color:var(--accent);}

/* ---------- numbered vertical list ---------- */
.step-list{border-top:1px solid var(--line);}
.step-item{
  border-bottom:1px solid var(--line);
  padding:32px 0;
  display:grid;
  grid-template-columns:1fr;
  gap:18px;
}
@media (min-width:768px){
  .step-item{grid-template-columns:96px minmax(0,1fr);gap:28px;align-items:start;}
}
.step-no{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-size:14px;
  letter-spacing:.06em;
  color:var(--ink-500);
  padding-top:6px;
}
.step-item h3{font-size:22px;margin-bottom:12px;}
.step-item p{font-size:16px;color:var(--ink-700);max-width:76ch;}
.step-points{
  margin-top:16px;
  display:grid;
  gap:10px;
  grid-template-columns:1fr;
}
@media (min-width:768px){
  .step-points{grid-template-columns:1fr 1fr;}
}
.step-points li{
  position:relative;
  padding-left:18px;
  font-size:14px;
  color:var(--ink-500);
  line-height:1.8;
}
.step-points li::before{
  content:"";
  position:absolute;
  left:0;
  top:.72em;
  width:6px;
  height:6px;
  background:var(--brand);
  border-radius:1px;
}
.step-fig{
  margin-top:20px;
  border:1px solid var(--line);
  border-radius:var(--radius-img);
  overflow:hidden;
  background:var(--paper);
  max-width:520px;
}
.step-fig img{width:100%;aspect-ratio:16/9;object-fit:cover;}

.quote-x{
  margin:26px 0 0;
  background:var(--paper);
  border-left:3px solid var(--accent);
  border-radius:0 var(--radius-card) var(--radius-card) 0;
  padding:18px 22px;
  color:var(--ink-700);
  font-size:15px;
  line-height:1.9;
  max-width:74ch;
}

/* ---------- compare ---------- */
.compare-wrap{
  display:grid;
  grid-template-columns:1fr;
  gap:0;
  border-top:1px solid var(--line);
}
@media (min-width:768px){
  .compare-wrap{grid-template-columns:1fr 1fr;column-gap:0;}
}
.compare-col{padding:30px 0;}
@media (min-width:768px){
  .compare-col{padding:34px 34px 34px 0;}
  .compare-col + .compare-col{border-left:1px solid var(--line);padding-left:34px;}
}
.compare-col h3{font-size:20px;margin-bottom:8px;}
.compare-col .cap{font-size:13px;color:var(--ink-500);margin-bottom:22px;}
.meter{margin-bottom:22px;}
.meter:last-child{margin-bottom:0;}
.meter-top{
  display:flex;
  align-items:baseline;
  justify-content:space-between;
  gap:12px;
  margin-bottom:8px;
}
.meter-name{font-size:14px;color:var(--ink-700);}
.meter-val{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-size:14px;
  color:var(--ink-900);
}
.meter-bar{
  height:8px;
  border-radius:var(--radius-pill);
  background:var(--line);
  overflow:hidden;
}
.meter-bar span{
  display:block;
  height:100%;
  border-radius:var(--radius-pill);
  background:var(--brand);
}
.compare-col.plain .meter-bar span{background:var(--neutral);}

/* ---------- snapshot cards ---------- */
.snap-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:20px;
}
@media (min-width:768px){.snap-grid{grid-template-columns:1fr 1fr;}}
@media (min-width:1200px){.snap-grid{grid-template-columns:repeat(3,1fr);}}
.snap{
  border:1px solid var(--line);
  background:var(--surface);
  border-radius:var(--radius-card);
  overflow:hidden;
  box-shadow:var(--shadow-1);
  transition:box-shadow .2s ease,transform .2s ease,border-color .2s ease;
  display:flex;
  flex-direction:column;
}
.snap:hover{box-shadow:var(--shadow-2);transform:translateY(-2px);border-color:var(--brand-100);}
.snap img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--radius-img);}
.snap-body{padding:20px 22px 24px;}
.snap-body h3{font-size:18px;margin-bottom:8px;}
.snap-body p{font-size:14px;color:var(--ink-500);margin:0;}

/* ---------- faq (custom accordion) ---------- */
.faq-list{border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;
  background:transparent;
  border:0;
  padding:22px 40px 22px 0;
  text-align:left;
  font-size:17px;
  font-weight:600;
  color:var(--ink-900);
  font-family:var(--font-serif);
  line-height:1.6;
  position:relative;
  cursor:pointer;
  transition:color .18s ease;
}
.faq-q:hover{color:var(--brand);}
.faq-q .mark{
  position:absolute;
  right:8px;
  top:50%;
  width:14px;
  height:14px;
  margin-top:-7px;
}
.faq-q .mark::before,
.faq-q .mark::after{
  content:"";
  position:absolute;
  background:var(--brand);
  border-radius:1px;
  transition:transform .18s ease,opacity .18s ease;
}
.faq-q .mark::before{left:0;top:6px;width:14px;height:1.5px;}
.faq-q .mark::after{left:6px;top:0;width:1.5px;height:14px;}
.faq-q[aria-expanded="true"] .mark::after{transform:rotate(90deg);opacity:0;}
.faq-a{
  display:none;
  padding:0 40px 24px 0;
  font-size:16px;
  line-height:1.9;
  color:var(--ink-700);
  max-width:72ch;
}
.faq-a.open{display:block;}

/* ---------- cta band ---------- */
.cta-band{
  background:var(--surface);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.cta-inner{
  padding:56px 0;
  display:grid;
  grid-template-columns:1fr;
  gap:26px;
  align-items:center;
}
@media (min-width:992px){
  .cta-inner{grid-template-columns:minmax(0,1fr) auto;gap:48px;padding:64px 0;}
}
.cta-inner h2{font-size:clamp(24px,2.6vw,30px);margin-bottom:12px;}
.cta-inner p{color:var(--ink-500);font-size:16px;margin:0;max-width:64ch;}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;}

/* ---------- footer ---------- */
.site-footer{
  background:var(--ink-900);
  color:#EFEDE8;
  padding:68px 0 26px;
  margin-top:0;
}
.footer-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:34px;
  padding-bottom:40px;
}
@media (min-width:768px){
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px 40px;}
}
@media (min-width:992px){
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr 1fr;column-gap:0;gap:0;}
  .footer-col{padding:0 32px;}
  .footer-col:first-child{padding-left:0;}
  .footer-col + .footer-col{border-left:1px solid rgba(255,255,255,.12);}
  .footer-col:last-child{padding-right:0;}
}
.footer-brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-serif);
  font-size:19px;
  font-weight:600;
  color:#fff;
  margin-bottom:16px;
}
.footer-brand .seal{background:#5FAE97;}
.footer-about{
  font-size:14px;
  line-height:2;
  color:rgba(239,237,232,.72);
  max-width:40ch;
  margin:0;
}
.footer-col h4{
  color:#fff;
  font-size:15px;
  margin-bottom:16px;
  font-weight:600;
}
.footer-col ul li{margin-bottom:4px;}
.footer-col ul a{
  color:rgba(239,237,232,.72);
  font-size:14px;
  line-height:2;
}
.footer-col ul a:hover{color:#fff;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);
  padding-top:22px;
  display:flex;
  flex-wrap:wrap;
  gap:10px 24px;
  justify-content:space-between;
  font-size:13px;
  color:rgba(239,237,232,.56);
}

@media (max-width:520px){
  .hero-actions .btn-x{width:100%;}
  .cta-actions .btn-x{width:100%;}
  .page-hero{padding:24px 0 48px;}
  .section{padding:56px 0;}
}

/* roulang page: category2 */
:root{
  --brand:#1F5C4E;
  --brand-600:#17473C;
  --brand-100:#E4EFEA;
  --accent:#C86A34;
  --accent-soft:#F6E7DC;
  --paper:#F7F4EE;
  --surface:#FFFFFF;
  --ink-900:#141917;
  --ink-700:#3A423F;
  --ink-500:#6B7570;
  --line:#E2DED4;
  --ok:#2E7D63;
  --neutral:#8A918C;
  --radius-card:14px;
  --radius-img:12px;
  --radius-btn:10px;
  --radius-pill:999px;
  --shadow-1:0 1px 2px rgba(20,25,23,.04),0 8px 24px -12px rgba(20,25,23,.10);
  --shadow-2:0 16px 36px -16px rgba(20,25,23,.16);
  --serif:"Noto Serif SC","Source Han Serif SC","Songti SC",serif;
  --mono:ui-monospace,"SFMono-Regular",Menlo,Consolas,"Courier New",monospace;
  --bs-primary:#1F5C4E;
  --bs-body-bg:#F7F4EE;
  --bs-border-radius:14px;
  --bs-body-font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink-700);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  font-size:16px;
  line-height:1.9;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto}
a{color:var(--brand);text-decoration:none;transition:color .18s ease,border-color .18s ease}
a:hover{color:var(--brand-600)}
button{font-family:inherit}
h1,h2,h3,h4{font-family:var(--serif);color:var(--ink-900);font-weight:600;letter-spacing:.01em;line-height:1.35;margin:0}
p{margin:0 0 1.4em}
p:last-child{margin-bottom:0}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.container{width:100%;max-width:1320px;margin:0 auto;padding:0 20px}
@media(min-width:992px){.container{padding:0 32px}}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(247,244,238,.96);
  border-bottom:1px solid var(--line);
  backdrop-filter:saturate(120%) blur(6px);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:64px}
@media(min-width:992px){.header-inner{height:72px}}
.brand{
  display:inline-flex;align-items:center;gap:10px;
  font-size:19px;font-weight:600;color:var(--ink-900);
  font-family:var(--serif);letter-spacing:.01em;
}
.brand:hover{color:var(--ink-900)}
.seal{width:8px;height:8px;background:var(--brand);border-radius:2px;display:inline-block}
.nav-links{display:none;gap:30px;align-items:center}
@media(min-width:992px){.nav-links{display:flex}}
.nav-link-x{
  position:relative;font-size:15px;font-weight:500;color:var(--ink-700);
  padding:6px 0;
}
.nav-link-x::after{
  content:"";position:absolute;left:0;right:0;bottom:-4px;height:2px;
  background:var(--brand);transform:scaleX(0);transform-origin:left;
  transition:transform .18s ease;
}
.nav-link-x:hover{color:var(--brand)}
.nav-link-x:hover::after{transform:scaleX(1)}
.nav-link-x.active{color:var(--brand)}
.nav-link-x.active::after{transform:scaleX(1)}
.menu-toggle{
  display:inline-flex;flex-direction:column;justify-content:center;gap:6px;
  width:44px;height:44px;padding:0 10px;
  background:transparent;border:1px solid var(--line);border-radius:var(--radius-btn);
  cursor:pointer;
}
.menu-toggle span{display:block;height:1px;background:var(--ink-700);transition:transform .18s ease,opacity .18s ease}
.menu-toggle[aria-expanded="true"] span:first-child{transform:translateY(3.5px) rotate(45deg)}
.menu-toggle[aria-expanded="true"] span:last-child{transform:translateY(-3.5px) rotate(-45deg)}
@media(min-width:992px){.menu-toggle{display:none}}
.mobile-drawer{
  display:none;border-top:1px solid var(--line);background:var(--paper);
  padding:8px 20px 28px;
}
.mobile-drawer.open{display:block}
@media(min-width:992px){.mobile-drawer{display:none !important}}
.mobile-drawer a{
  display:block;font-size:20px;color:var(--ink-900);padding:16px 0;
  border-bottom:1px solid var(--line);
}
.mobile-drawer a.active{color:var(--brand)}
.mobile-drawer .btn-x{margin-top:20px}

/* ---------- Buttons ---------- */
.btn-x{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:500;line-height:1.2;cursor:pointer;
  border:1px solid transparent;transition:background .18s ease,color .18s ease,transform .18s ease,box-shadow .18s ease,border-color .18s ease;
}
.btn-primary-x{background:var(--brand);color:#fff;border-color:var(--brand)}
.btn-primary-x:hover{background:var(--brand-600);border-color:var(--brand-600);color:#fff;transform:translateY(-1px);box-shadow:var(--shadow-1)}
.btn-primary-x:active{transform:translateY(0)}
.btn-ghost-x{background:transparent;color:var(--ink-900);border-color:var(--line)}
.btn-ghost-x:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-1px)}
.btn-sm-x{padding:10px 18px;font-size:14px}

/* ---------- Page head ---------- */
.page-head{padding:28px 0 0;background:
  linear-gradient(to right,rgba(226,222,212,.55) 1px,transparent 1px) 0 0/64px 64px,
  linear-gradient(to bottom,rgba(226,222,212,.55) 1px,transparent 1px) 0 0/64px 64px,
  var(--paper);
}
.breadcrumb-x{display:flex;flex-wrap:wrap;gap:8px;align-items:center;font-size:14px;color:var(--ink-500);margin-bottom:26px}
.breadcrumb-x a{color:var(--ink-500)}
.breadcrumb-x a:hover{color:var(--brand)}
.breadcrumb-x .sep{color:var(--line)}
.breadcrumb-x .now{color:var(--ink-700)}
.head-grid{display:grid;grid-template-columns:1fr;gap:32px;align-items:end;padding-bottom:56px}
@media(min-width:992px){.head-grid{grid-template-columns:7fr 5fr;gap:56px;padding-bottom:96px}}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-family:var(--mono);
  font-size:13px;letter-spacing:.08em;color:var(--ink-500);margin-bottom:18px;
}
.eyebrow::before{content:"";width:8px;height:8px;border-radius:2px;background:var(--accent)}
.page-head h1{
  font-size:clamp(30px,4.4vw,48px);
  margin-bottom:22px;
}
.lead{font-size:17px;color:var(--ink-700);max-width:62ch;margin-bottom:26px}
.tag-row{display:flex;flex-wrap:wrap;gap:10px}
.tag-x{
  display:inline-flex;align-items:center;
  padding:6px 14px;border:1px solid var(--line);border-radius:var(--radius-pill);
  font-size:13px;color:var(--ink-500);background:var(--surface);
}
.head-media{margin:0;border:1px solid var(--line);border-radius:var(--radius-card);overflow:hidden;background:var(--surface);box-shadow:var(--shadow-1)}
.head-media img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:0}
.head-media figcaption{font-size:13px;color:var(--ink-500);padding:12px 16px;border-top:1px solid var(--line);text-align:center}

/* ---------- Sections ---------- */
.section{padding:56px 0}
@media(min-width:992px){.section{padding:96px 0}}
.section-head{max-width:70ch;margin-bottom:40px}
.section-head h2{font-size:clamp(26px,3vw,34px);margin-bottom:16px;position:relative;padding-left:18px}
.section-head h2::before{content:"";position:absolute;left:0;top:.28em;bottom:.28em;width:3px;background:var(--brand);border-radius:2px}
.section-head p{color:var(--ink-500);font-size:16px}

/* ---------- Layout with anchors ---------- */
.layout{display:grid;grid-template-columns:1fr;gap:40px}
@media(min-width:1200px){.layout{grid-template-columns:minmax(0,1fr) 300px;gap:56px;align-items:start}}
.content-aside{display:flex;flex-direction:column;gap:20px}
@media(min-width:1200px){.content-aside{position:sticky;top:96px}}
.anchor-nav{
  border:1px solid var(--line);border-radius:var(--radius-card);background:var(--surface);
  padding:20px;box-shadow:var(--shadow-1);
}
.anchor-nav h2{font-size:15px;font-family:"PingFang SC","Microsoft YaHei",sans-serif;font-weight:600;letter-spacing:.02em;color:var(--ink-500);margin-bottom:14px}
.anchor-nav ol{list-style:none;margin:0;padding:0;counter-reset:anchor}
.anchor-nav li{counter-increment:anchor;border-top:1px solid var(--line)}
.anchor-nav li:first-child{border-top:0}
.anchor-nav a{
  display:flex;gap:10px;align-items:baseline;padding:11px 0;
  font-size:14px;color:var(--ink-700);
}
.anchor-nav a::before{
  content:counter(anchor,decimal-leading-zero);
  font-family:var(--mono);font-size:12px;color:var(--ink-500);
}
.anchor-nav a:hover,.anchor-nav a.is-current{color:var(--brand)}
.anchor-nav a:hover::before,.anchor-nav a.is-current::before{color:var(--accent)}
@media(max-width:1199px){
  .anchor-nav ol{display:flex;gap:0;overflow-x:auto;padding-bottom:4px}
  .anchor-nav li{border-top:0;border-right:1px solid var(--line);flex:0 0 auto}
  .anchor-nav li:last-child{border-right:0}
  .anchor-nav a{padding:8px 14px;white-space:nowrap}
}
.aside-card{
  border:1px solid var(--line);border-radius:var(--radius-card);background:var(--surface);
  padding:20px;box-shadow:var(--shadow-1);
}
.aside-card img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--radius-img);border:1px solid var(--line);margin-bottom:16px}
.aside-card h3{font-size:18px;margin-bottom:10px}
.aside-card p{font-size:14px;color:var(--ink-500);margin-bottom:14px}
.aside-item{display:flex;justify-content:space-between;gap:12px;padding:10px 0;border-top:1px solid var(--line);font-size:14px}
.aside-item:first-of-type{border-top:0}
.aside-item span:first-child{color:var(--ink-500)}
.aside-item span:last-child{font-family:var(--mono);color:var(--ink-900)}

/* ---------- Step list ---------- */
.step-row{
  display:grid;grid-template-columns:1fr;gap:14px;
  padding:26px 0;border-top:1px solid var(--line);
}
@media(min-width:768px){.step-row{grid-template-columns:88px minmax(0,1fr);gap:24px;padding:32px 0}}
.step-row:last-child{border-bottom:1px solid var(--line)}
.step-no{font-family:var(--mono);font-size:14px;color:var(--ink-500);letter-spacing:.08em;padding-top:6px}
.step-row h3{font-size:22px;margin-bottom:12px}
.step-row p{max-width:72ch}
.dot-list{list-style:none;margin:16px 0 0;padding:0}
.dot-list li{position:relative;padding-left:20px;margin-bottom:8px;font-size:15.5px;color:var(--ink-700)}
.dot-list li::before{
  content:"";position:absolute;left:2px;top:.72em;
  width:6px;height:6px;border-radius:1px;background:var(--brand);
}
.callout{
  margin-top:18px;background:var(--paper);border-left:3px solid var(--accent);
  border-radius:0 var(--radius-img) var(--radius-img) 0;padding:16px 20px;
  font-size:15px;color:var(--ink-700);max-width:72ch;
}

/* ---------- Compare ---------- */
.compare-grid{display:grid;grid-template-columns:1fr;gap:32px;border-top:1px solid var(--line);padding-top:36px}
@media(min-width:768px){.compare-grid{grid-template-columns:1fr 1fr;gap:0}}
.compare-col{padding:0 0 8px}
@media(min-width:768px){
  .compare-col{padding:0 36px}
  .compare-col:first-child{border-right:1px solid var(--line);padding-left:0}
  .compare-col:last-child{padding-right:0}
}
.compare-col h3{font-size:18px;margin-bottom:6px}
.compare-col .col-note{font-size:13px;color:var(--ink-500);font-family:var(--mono);letter-spacing:.06em;margin-bottom:22px}
.metric{margin-bottom:22px}
.metric-top{display:flex;justify-content:space-between;align-items:baseline;gap:12px;font-size:14px;margin-bottom:8px}
.metric-top span:first-child{color:var(--ink-700)}
.metric-top span:last-child{font-family:var(--mono);font-variant-numeric:tabular-nums;color:var(--ink-900);font-weight:600}
.bar{height:8px;border-radius:var(--radius-pill);background:var(--line);overflow:hidden}
.bar i{display:block;height:100%;border-radius:var(--radius-pill);background:var(--neutral)}
.compare-col.is-good .bar i{background:var(--brand)}
.compare-foot{font-size:13px;color:var(--ink-500);margin-top:8px}

/* ---------- FAQ ---------- */
.faq-list{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  width:100%;display:flex;justify-content:space-between;align-items:center;gap:20px;
  background:transparent;border:0;text-align:left;cursor:pointer;
  padding:20px 0;font-size:17px;font-weight:600;color:var(--ink-900);
}
.faq-q:hover{color:var(--brand)}
.faq-icon{position:relative;flex:0 0 auto;width:16px;height:16px}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:var(--brand);transition:transform .18s ease,opacity .18s ease;
}
.faq-icon::before{left:0;right:0;top:7.5px;height:1.5px}
.faq-icon::after{top:0;bottom:0;left:7.25px;width:1.5px}
.faq-item.open .faq-icon::after{transform:rotate(90deg);opacity:0}
.faq-a{display:none;padding:0 0 24px;max-width:72ch;color:var(--ink-700);font-size:16px}
.faq-item.open .faq-a{display:block}

/* ---------- CTA band ---------- */
.cta-band{background:var(--ink-900);color:#F2EFE9;padding:56px 0}
@media(min-width:992px){.cta-band{padding:80px 0}}
.cta-inner{display:grid;grid-template-columns:1fr;gap:32px}
@media(min-width:992px){.cta-inner{grid-template-columns:7fr 5fr;gap:56px;align-items:center}}
.cta-band h2{color:#fff;font-size:clamp(24px,2.6vw,32px);margin-bottom:14px}
.cta-band p{color:rgba(242,239,233,.72);max-width:56ch}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px}
.cta-band .btn-ghost-x{color:#F2EFE9;border-color:rgba(242,239,233,.35)}
.cta-band .btn-ghost-x:hover{color:#fff;border-color:#fff}
.cta-meta{display:flex;flex-wrap:wrap;gap:28px;margin-top:28px;padding-top:22px;border-top:1px solid rgba(242,239,233,.18)}
.cta-meta div{font-size:13px;color:rgba(242,239,233,.62)}
.cta-meta strong{display:block;font-family:var(--mono);font-size:15px;color:#fff;font-weight:600;margin-top:4px;letter-spacing:.02em}

/* ---------- Footer ---------- */
.site-footer{background:var(--ink-900);color:#F2EFE9;padding:64px 0 28px;border-top:1px solid rgba(242,239,233,.12)}
.footer-grid{display:grid;grid-template-columns:1fr;gap:36px}
@media(min-width:768px){.footer-grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:992px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1fr;gap:0}}
.footer-col{padding:0}
@media(min-width:992px){
  .footer-col{padding:0 32px;border-right:1px solid rgba(242,239,233,.12)}
  .footer-col:first-child{padding-left:0}
  .footer-col:last-child{border-right:0;padding-right:0}
}
@media(max-width:991px){
  .footer-col{border-top:1px solid rgba(242,239,233,.12);padding-top:24px}
  .footer-col:first-child{border-top:0;padding-top:0}
}
.footer-brand{display:inline-flex;align-items:center;gap:10px;font-family:var(--serif);font-size:19px;font-weight:600;color:#fff;margin-bottom:16px}
.footer-about{font-size:14px;line-height:1.9;color:rgba(242,239,233,.68);max-width:38ch}
.site-footer h4{font-size:15px;color:#fff;margin-bottom:16px;font-family:"PingFang SC","Microsoft YaHei",sans-serif;font-weight:600}
.site-footer ul{list-style:none;margin:0;padding:0}
.site-footer li{margin-bottom:6px}
.site-footer ul a{font-size:14px;line-height:2;color:rgba(242,239,233,.7)}
.site-footer ul a:hover{color:#fff}
.footer-bottom{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  margin-top:48px;padding-top:22px;border-top:1px solid rgba(242,239,233,.14);
  font-size:13px;color:rgba(242,239,233,.5);
}

/* ---------- Small screens ---------- */
@media(max-width:575px){
  .page-head h1{font-size:30px}
  .lead{font-size:16px}
  .btn-x{width:100%}
  .cta-actions{flex-direction:column}
  .cta-meta{gap:18px}
}