/* roulang page: index */
:root{
  --brand:#143D34;
  --brand-dark:#0E2C26;
  --accent:#C4703C;
  --accent-dark:#9E5528;
  --sand:#F5EFE3;
  --page:#FBF8F1;
  --card:#FFFFFF;
  --line:#E3DCCE;
  --ink:#1E2422;
  --ink-2:#5C665F;
  --ink-3:#8A928B;
  --ok:#3F6F5B;
  --ok-bg:#EEF3EF;
  --r-lg:16px;
  --r-md:12px;
  --r-sm:10px;
  --sh-1:0 1px 2px rgba(20,61,52,.06);
  --sh-2:0 10px 26px -14px rgba(20,61,52,.28);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--page);
  color:var(--ink);
  font-family:system-ui,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",sans-serif;
  font-size:16px;
  line-height:1.9;
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%;height:auto}
a{color:var(--brand);text-decoration:none}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p,figure{margin:0}
button{font:inherit;color:inherit}
input,select,textarea{font:inherit;color:inherit}
::selection{background:rgba(196,112,60,.22)}

.wrap{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
.section{padding:88px 0}
.section--white{background:#fff}
.section--sand{background:var(--sand)}
.section--tight{padding:64px 0}

.eyebrow{
  display:block;
  font-size:12px;
  font-weight:600;
  letter-spacing:.12em;
  color:var(--accent);
  margin-bottom:8px;
}
.h1{font-size:clamp(30px,4vw,44px);font-weight:700;line-height:1.28;letter-spacing:.01em;color:var(--brand)}
.h2{font-size:clamp(23px,2.6vw,32px);font-weight:700;line-height:1.35;color:var(--brand)}
.h3{font-size:18px;font-weight:600;line-height:1.5;color:var(--ink)}
.lead{color:var(--ink-2);line-height:1.9}
.muted{color:var(--ink-3);font-size:13px;line-height:1.75}

.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:18px;margin-bottom:38px}
.section-note{max-width:420px;color:var(--ink-2);font-size:14px;line-height:1.8}
.section-head .text-link{margin-bottom:4px}

.card{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  box-shadow:var(--sh-1);
  transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
}
.card--hover:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:#d5cbb8}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border:1px solid transparent;border-radius:var(--r-sm);
  padding:11px 20px;font-size:15px;font-weight:600;line-height:1.4;
  cursor:pointer;text-align:center;
  transition:background .18s ease,color .18s ease,border-color .18s ease,box-shadow .18s ease,transform .12s ease;
}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:var(--brand-dark);box-shadow:0 12px 24px -16px rgba(20,61,52,.9)}
.btn-ghost{background:#fff;border-color:var(--brand);color:var(--brand)}
.btn-ghost:hover{background:var(--sand)}
.btn-accent{background:var(--accent);color:#fff}
.btn-accent:hover{background:var(--accent-dark)}
.btn-sm{padding:8px 14px;font-size:14px}
.btn:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.btn:active{transform:scale(.99)}
.btn-block{width:100%}

.text-link{
  display:inline-flex;align-items:center;gap:6px;
  font-size:14px;font-weight:600;color:var(--brand);
}
.text-link:hover{text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px}
.text-link::after{content:"→";font-size:13px;color:var(--accent)}

.badge{
  display:inline-flex;align-items:center;gap:6px;
  border-radius:999px;padding:3px 11px;
  font-size:12px;font-weight:600;line-height:1.4;
  background:rgba(196,112,60,.13);color:var(--accent-dark);
}
.badge--soft{background:var(--ok-bg);color:var(--brand)}
.chip{
  display:inline-flex;align-items:center;
  border-radius:999px;border:1px solid var(--line);
  background:#fff;padding:4px 12px;
  font-size:12px;font-weight:500;line-height:1.5;color:var(--ink-2);
}

/* header */
.site-header{position:sticky;top:0;z-index:60}
.topbar{background:#fff;border-bottom:1px solid var(--line);transition:box-shadow .2s ease}
.site-header.is-scrolled .topbar{box-shadow:0 2px 10px rgba(20,61,52,.08)}
.topbar-inner{
  max-width:1200px;margin:0 auto;padding:0 20px;
  height:64px;display:flex;align-items:center;gap:18px;
}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{
  width:36px;height:36px;border-radius:10px;
  background:var(--brand);color:#fff;
  display:flex;align-items:center;justify-content:center;
  font-size:17px;font-weight:700;letter-spacing:0;
}
.brand-text{display:flex;flex-direction:column;line-height:1.25}
.brand-main{font-size:17px;font-weight:700;color:var(--brand)}
.brand-sub{font-size:11px;font-weight:500;color:var(--ink-3);letter-spacing:.02em}

.search-box{
  flex:1 1 auto;max-width:320px;
  display:flex;align-items:center;
  background:var(--sand);border:1px solid transparent;
  border-radius:999px;padding:4px 4px 4px 16px;
  transition:border-color .18s ease,background .18s ease;
}
.search-box:focus-within{border-color:var(--accent);background:#fff;box-shadow:0 0 0 3px rgba(196,112,60,.14)}
.search-box input{
  flex:1;border:0;background:transparent;outline:none;
  font-size:13.5px;line-height:1.6;color:var(--ink);min-width:0;
}
.search-box input::placeholder{color:var(--ink-3)}
.search-box button{
  flex-shrink:0;width:32px;height:32px;border-radius:999px;border:0;
  background:var(--brand);color:#fff;cursor:pointer;font-size:13px;
  display:flex;align-items:center;justify-content:center;
  transition:background .18s ease;
}
.search-box button:hover{background:var(--brand-dark)}

.top-actions{display:flex;align-items:center;gap:12px;margin-left:auto;flex-shrink:0}
.version-select{
  border:1px solid var(--line);background:#fff;border-radius:var(--r-sm);
  font-size:13px;font-weight:600;color:var(--brand);
  padding:6px 10px;cursor:pointer;outline:none;
  transition:border-color .18s ease;
}
.version-select:hover,.version-select:focus{border-color:var(--accent)}
.lang-switch{
  display:inline-flex;border:1px solid var(--line);border-radius:999px;overflow:hidden;background:#fff;
}
.lang-switch span{
  padding:5px 11px;font-size:12px;font-weight:600;color:var(--ink-3);cursor:pointer;
  transition:background .18s ease,color .18s ease;
}
.lang-switch span.active{background:var(--sand);color:var(--brand)}
.lang-switch span:hover{color:var(--brand)}
.menu-toggle{
  display:none;width:38px;height:38px;border-radius:var(--r-sm);
  border:1px solid var(--line);background:#fff;cursor:pointer;
  align-items:center;justify-content:center;font-size:16px;color:var(--brand);
}

.subnav{background:#fff;border-bottom:1px solid var(--line)}
.subnav-inner{
  max-width:1200px;margin:0 auto;padding:0 20px;
  height:38px;display:flex;align-items:center;gap:26px;
  overflow-x:auto;scrollbar-width:none;
}
.subnav-inner::-webkit-scrollbar{display:none}
.subnav-inner a{
  position:relative;flex-shrink:0;
  font-size:14px;font-weight:500;color:var(--ink-2);
  line-height:38px;padding:0 1px;
  transition:color .18s ease;
}
.subnav-inner a::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;
  background:var(--accent);transform:scaleX(0);transform-origin:left;
  transition:transform .2s ease;
}
.subnav-inner a:hover{color:var(--brand)}
.subnav-inner a:hover::after{transform:scaleX(1)}
.subnav-inner a.active{color:var(--brand);font-weight:600}
.subnav-inner a.active::after{transform:scaleX(1)}

.mobile-panel{
  display:none;background:#fff;border-bottom:1px solid var(--line);
  padding:16px 20px 20px;
}
.mobile-panel.open{display:block}
.mobile-panel .search-box{max-width:none;margin-bottom:14px}
.mobile-links{display:flex;flex-direction:column;gap:2px;margin-bottom:14px}
.mobile-links a{
  padding:10px 12px;border-radius:var(--r-sm);font-size:15px;font-weight:500;color:var(--ink-2);
  transition:background .18s ease,color .18s ease;
}
.mobile-links a:hover{background:var(--sand);color:var(--brand)}
.mobile-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px}

/* hero */
.hero-grid{display:grid;grid-template-columns:1.9fr 1fr;gap:24px;align-items:start}
.hero-main{padding:38px 36px 34px;position:relative;overflow:hidden}
.hero-main .h1{margin-bottom:16px}
.hero-sub{font-size:16px;color:var(--ink-2);line-height:1.85;margin-bottom:16px}
.hero-desc{font-size:15.5px;color:var(--ink-2);line-height:1.95;margin-bottom:26px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:22px}
.hero-badges{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:26px}
.hero-figure{
  border-radius:var(--r-md);overflow:hidden;border:1px solid var(--line);
  background:var(--sand);
}
.hero-figure img{width:100%;height:280px;object-fit:cover}
.hero-side{display:flex;flex-direction:column;gap:20px}
.side-card{padding:24px 22px}
.side-card--b{margin-left:26px}
.side-card .h3{font-size:16.5px;margin-bottom:8px}
.side-card p{font-size:14px;color:var(--ink-2);line-height:1.8;margin-bottom:14px}

.quick-search{
  margin-top:24px;background:#fff;border:1px solid var(--line);
  border-radius:var(--r-lg);padding:18px 22px;
  box-shadow:var(--sh-1);
}
.quick-search-form{display:flex;gap:12px;align-items:center}
.quick-search-form input{
  flex:1;min-width:0;border:1px solid var(--line);background:var(--page);
  border-radius:var(--r-sm);padding:11px 16px;font-size:14.5px;outline:none;
  transition:border-color .18s ease,box-shadow .18s ease,background .18s ease;
}
.quick-search-form input:focus{
  border-color:var(--accent);background:#fff;box-shadow:0 0 0 3px rgba(196,112,60,.16);
}
.quick-search-hint{font-size:12.5px;color:var(--ink-3);margin-top:10px}

/* download */
.download-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.download-card{padding:28px 24px;display:flex;flex-direction:column;height:100%}
.download-icon{
  width:46px;height:46px;border-radius:var(--r-md);
  background:var(--sand);color:var(--brand);
  display:flex;align-items:center;justify-content:center;
  font-size:20px;margin-bottom:16px;border:1px solid var(--line);
}
.download-card .h3{margin-bottom:8px}
.download-card p{font-size:14px;color:var(--ink-2);line-height:1.8;margin-bottom:18px;flex:1}
.download-file{
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-size:12.5px;background:var(--sand);border-radius:8px;
  padding:5px 10px;color:var(--ink-2);display:inline-block;margin-bottom:16px;
}
.foot-note{
  margin-top:24px;font-size:12.5px;color:var(--ink-3);line-height:1.8;
  padding-left:12px;border-left:3px solid var(--accent);
}

/* metrics */
.metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.metric{padding:26px 22px;position:relative}
.metric-num{font-size:32px;font-weight:700;color:var(--brand);line-height:1.2}
.metric-unit{font-size:13px;font-weight:600;color:var(--ink-2);margin-left:4px}
.metric-label{font-size:14px;color:var(--ink-2);line-height:1.7;margin-top:8px}
.metric-arrow{
  position:absolute;right:20px;bottom:18px;color:var(--accent);font-size:15px;opacity:.85;
}
.metric-foot{
  margin-top:14px;padding-top:12px;border-top:1px solid var(--line);
  font-size:12px;color:var(--ink-3);
}

/* keyword entries */
.entries{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.entry{
  background:var(--sand);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:26px 24px;display:flex;flex-direction:column;
  transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
}
.entry:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:#d5cbb8}
.entry-code{
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-size:12px;font-weight:600;color:var(--accent);letter-spacing:.06em;margin-bottom:10px;
}
.entry .h3{margin-bottom:10px}
.entry p{font-size:14px;color:var(--ink-2);line-height:1.85;flex:1;margin-bottom:16px}

/* audience */
.audience{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.audience-item{padding:24px 22px}
.audience-item .h3{font-size:16px;margin-bottom:8px}
.audience-item p{font-size:14px;color:var(--ink-2);line-height:1.8}

/* fit / unfit */
.compare{display:grid;grid-template-columns:1fr 1fr;gap:0;position:relative}
.compare-col{padding:32px 30px;border-radius:var(--r-lg)}
.compare-col--no{background:#F1EEE7;border:1px solid var(--line)}
.compare-col--yes{background:#fff;border:1px solid var(--brand);box-shadow:var(--sh-1)}
.compare-col h3{font-size:18px;font-weight:600;margin-bottom:18px;display:flex;align-items:center;gap:8px}
.compare-divider{
  width:1px;background:var(--line);margin:0 24px;
  align-self:stretch;
}
.compare-list li{
  display:flex;gap:10px;font-size:14.5px;color:var(--ink-2);line-height:1.8;
  padding:9px 0;
}
.compare-list li + li{border-top:1px dashed rgba(227,220,206,.9)}
.mark{flex-shrink:0;font-weight:700;font-size:14px;line-height:1.8}
.mark-no{color:#A8503B}
.mark-yes{color:var(--ok)}

/* matrix */
.matrix{display:grid;grid-template-columns:1.15fr 1fr;gap:22px}
.matrix-main{padding:0;overflow:hidden;display:flex;flex-direction:column}
.matrix-main img{width:100%;height:220px;object-fit:cover}
.matrix-body{padding:26px 26px 28px;display:flex;flex-direction:column;flex:1}
.matrix-body .h3{font-size:20px;margin-bottom:10px}
.matrix-body p{font-size:14.5px;color:var(--ink-2);line-height:1.85;margin-bottom:18px;flex:1}
.matrix-side{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.matrix-cell{padding:22px 20px;display:flex;flex-direction:column}
.matrix-cell .h3{font-size:15.5px;margin-bottom:6px}
.matrix-cell p{font-size:13.5px;color:var(--ink-2);line-height:1.75;flex:1;margin-bottom:12px}
.matrix-cell .text-link{font-size:13px}

/* timeline */
.timeline{display:flex;gap:0;overflow-x:auto;padding-bottom:8px;scrollbar-width:thin}
.tl-node{flex:1 0 200px;position:relative;padding:28px 18px 0 0}
.tl-node::before{
  content:"";position:absolute;top:8px;left:0;right:0;height:1px;background:var(--line);
}
.tl-dot{
  position:absolute;top:2px;left:0;width:13px;height:13px;border-radius:999px;
  background:var(--accent);box-shadow:0 0 0 4px rgba(196,112,60,.15);
}
.tl-step{font-size:12px;font-weight:600;letter-spacing:.1em;color:var(--ink-3);margin-bottom:6px}
.tl-title{font-size:16px;font-weight:600;color:var(--brand);margin-bottom:8px}
.tl-desc{font-size:13.5px;color:var(--ink-2);line-height:1.8;padding-right:12px}

/* local */
.local{display:grid;grid-template-columns:1fr 1.05fr;gap:24px;align-items:stretch}
.local-main{padding:34px 32px;background:#fff;border:1px solid var(--line);border-radius:var(--r-lg)}
.local-main .h2{margin-bottom:14px}
.local-main p{font-size:15px;color:var(--ink-2);line-height:1.95;margin-bottom:14px}
.local-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.local-cell{padding:22px 20px;display:flex;flex-direction:column;gap:8px}
.local-cell span.ic{
  width:34px;height:34px;border-radius:9px;background:var(--sand);
  display:flex;align-items:center;justify-content:center;color:var(--accent);font-size:15px;
}
.local-cell .h3{font-size:15px}
.local-cell p{font-size:13.5px;color:var(--ink-2);line-height:1.75}

/* news */
.news-grid{display:grid;grid-template-columns:1.35fr 1fr;gap:24px;align-items:start}
.news-lead{overflow:hidden;display:block;cursor:pointer}
.news-lead-img{width:100%;height:250px;object-fit:cover;background:var(--sand)}
.news-lead-body{padding:24px 26px 26px}
.news-lead-body .h3{font-size:20px;margin:10px 0 10px;transition:color .18s ease}
.news-lead:hover .news-lead-body .h3{color:var(--brand)}
.news-lead-body p{font-size:14px;color:var(--ink-2);line-height:1.8;margin-bottom:14px}
.news-meta{display:flex;align-items:center;gap:12px;flex-wrap:wrap;font-size:12.5px;color:var(--ink-3)}
.news-side{display:flex;flex-direction:column;gap:14px}
.news-item{
  display:block;padding:18px 20px;cursor:pointer;
}
.news-item .h3{font-size:15.5px;margin-bottom:6px;transition:color .18s ease;line-height:1.55}
.news-item:hover .h3{color:var(--brand)}
.news-item p{font-size:13px;color:var(--ink-2);line-height:1.7;margin-bottom:10px;
  display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden;}
.news-empty{
  padding:56px 24px;text-align:center;background:#fff;border:1px dashed var(--line);
  border-radius:var(--r-lg);
}
.news-empty p{font-size:14px;color:var(--ink-3);margin-bottom:16px}

/* guarantee */
.guard{display:grid;grid-template-columns:repeat(4,1fr);gap:0}
.guard-item{
  padding:24px 22px 24px 20px;border-left:3px solid var(--accent);
  border-top:1px solid var(--sand);border-bottom:1px solid var(--sand);
}
.guard-item + .guard-item{border-left:3px solid var(--accent)}
.guard-item .h3{font-size:15.5px;margin-bottom:8px}
.guard-item p{font-size:13.5px;color:var(--ink-2);line-height:1.8}

/* quick answers */
.quick{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.quick-card{padding:24px 22px;background:var(--sand);border:1px solid var(--line);border-radius:var(--r-md)}
.quick-card h3{font-size:15px;font-weight:600;margin-bottom:8px;line-height:1.6}
.quick-card p{font-size:13.5px;color:var(--ink-2);line-height:1.8;margin-bottom:12px}
.quick-card .text-link{font-size:13px}

/* faq */
.faq-wrap{max-width:880px;margin:0 auto}
.faq-item{border:1px solid var(--line);border-radius:var(--r-md);background:#fff;margin-bottom:12px;overflow:hidden}
.faq-q{
  width:100%;display:flex;align-items:center;gap:14px;
  background:transparent;border:0;cursor:pointer;text-align:left;
  padding:16px 20px;min-height:56px;
  font-size:15.5px;font-weight:600;color:var(--brand);line-height:1.6;
}
.faq-q:hover{background:var(--sand)}
.faq-q:focus-visible{outline:2px solid var(--accent);outline-offset:-2px}
.faq-idx{font-size:12px;font-weight:700;color:var(--accent);letter-spacing:.08em;flex-shrink:0}
.faq-sign{margin-left:auto;font-size:18px;font-weight:400;color:var(--accent);flex-shrink:0;line-height:1}
.faq-a{display:none;padding:0 20px 20px 52px;background:var(--page)}
.faq-a p{font-size:14.5px;color:var(--ink-2);line-height:1.9}
.faq-item.open .faq-a{display:block}

/* steps */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;position:relative}
.step{position:relative;padding-top:6px}
.step-num{
  width:34px;height:34px;border-radius:999px;background:#fff;border:1px solid var(--accent);
  color:var(--accent);display:flex;align-items:center;justify-content:center;
  font-size:14px;font-weight:700;margin-bottom:14px;
}
.step h3{font-size:15.5px;font-weight:600;margin-bottom:6px;color:var(--brand)}
.step p{font-size:13.5px;color:var(--ink-2);line-height:1.8}
.step::after{
  content:"";position:absolute;top:22px;right:-9px;width:18px;border-top:1px dashed var(--line);
}
.step:last-child::after{display:none}

/* topics */
.topics{display:grid;grid-template-columns:repeat(2,1fr);gap:22px;margin-top:28px}
.topic{display:block;padding:0;overflow:hidden;cursor:pointer}
.topic img{width:100%;height:170px;object-fit:cover}
.topic-body{padding:22px 22px 24px}
.topic-body .h3{font-size:17px;margin-bottom:8px}
.topic-body p{font-size:13.5px;color:var(--ink-2);line-height:1.8;margin-bottom:12px}
.tags{display:flex;flex-wrap:wrap;gap:10px}
.tags a{
  display:inline-flex;border-radius:999px;border:1px solid var(--line);
  background:#fff;padding:6px 15px;font-size:13px;color:var(--ink-2);
  transition:color .18s ease,border-color .18s ease,background .18s ease;
}
.tags a:hover{color:var(--brand);border-color:var(--brand);background:var(--sand)}

/* form */
.contact{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:start}
.contact-left .h2{margin-bottom:16px}
.contact-left p{font-size:14.5px;color:var(--ink-2);line-height:1.9;margin-bottom:14px}
.contact-points li{
  display:flex;gap:10px;font-size:14px;color:var(--ink-2);line-height:1.85;padding:6px 0;
}
.contact-points li::before{content:"·";color:var(--accent);font-weight:700;font-size:18px;line-height:1.4}
.contact-note{margin-top:18px;font-size:12.5px;color:var(--ink-3);line-height:1.8}
.form-card{background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);padding:28px 26px;box-shadow:var(--sh-1)}
.field{margin-bottom:16px}
.field label{display:block;font-size:13.5px;font-weight:600;color:var(--brand);margin-bottom:6px}
.field input,.field select,.field textarea{
  width:100%;border:1px solid var(--line);border-radius:var(--r-sm);
  background:var(--page);padding:10px 14px;font-size:14px;outline:none;
  transition:border-color .18s ease,box-shadow .18s ease,background .18s ease;
}
.field textarea{min-height:96px;resize:vertical;line-height:1.8}
.field input:focus,.field select:focus,.field textarea:focus{
  border-color:var(--accent);background:#fff;box-shadow:0 0 0 3px rgba(196,112,60,.16);
}
.form-check{display:flex;gap:9px;align-items:flex-start;font-size:12.5px;color:var(--ink-3);line-height:1.75;margin-bottom:18px}
.form-check input{margin-top:4px;flex-shrink:0}

/* footer */
.site-footer{background:var(--brand);color:#E8EFEA;padding:64px 0 0}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:34px;padding-bottom:44px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.footer-brand .brand-mark{background:rgba(255,255,255,.14);color:#F5EFE3}
.footer-brand .brand-main{color:#fff}
.footer-brand .brand-sub{color:rgba(245,239,227,.62)}
.footer-desc{font-size:13.5px;line-height:1.9;color:rgba(245,239,227,.72);max-width:320px}
.footer-col h4{font-size:14px;font-weight:600;color:#fff;margin-bottom:14px;letter-spacing:.02em}
.footer-col li{margin-bottom:2px}
.footer-col a{
  display:inline-block;font-size:14px;line-height:2;color:rgba(245,239,227,.72);
  transition:color .18s ease,transform .18s ease;
}
.footer-col a:hover{color:#fff;transform:translateX(2px)}
.footer-divider{border-top:1px solid rgba(255,255,255,.12);padding-top:22px}
.footer-tags{display:flex;flex-wrap:wrap;gap:9px;padding-bottom:24px}
.footer-tags a{
  border:1px solid rgba(255,255,255,.18);border-radius:999px;
  padding:4px 13px;font-size:12px;color:rgba(245,239,227,.78);
  transition:background .18s ease,color .18s ease;
}
.footer-tags a:hover{background:rgba(255,255,255,.12);color:#fff}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);
  padding:20px 0 26px;display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:12.5px;color:rgba(245,239,227,.6);line-height:1.8;
}

@media (max-width:1024px){
  .section{padding:64px 0}
  .hero-grid{grid-template-columns:1fr}
  .hero-side{flex-direction:row}
  .side-card--b{margin-left:0}
  .side-card{flex:1}
  .metrics{grid-template-columns:repeat(2,1fr)}
  .entries{grid-template-columns:1fr 1fr}
  .audience{grid-template-columns:1fr 1fr}
  .matrix{grid-template-columns:1fr}
  .local{grid-template-columns:1fr}
  .news-grid{grid-template-columns:1fr}
  .guard{grid-template-columns:1fr 1fr}
  .quick{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr 1fr}
  .step:nth-child(2n)::after{display:none}
  .contact{grid-template-columns:1fr;gap:28px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .topbar-inner{gap:12px}
  .search-box{max-width:220px}
}

@media (max-width:820px){
  .search-box{display:none}
  .lang-switch{display:none}
  .version-select{display:none}
  .menu-toggle{display:flex}
  .download-grid{grid-template-columns:1fr}
  .compare{grid-template-columns:1fr}
  .compare-divider{display:none}
  .topics{grid-template-columns:1fr}
  .matrix-side{grid-template-columns:1fr 1fr}
  .news-lead-img{height:200px}
}

@media (max-width:640px){
  .wrap,.topbar-inner,.subnav-inner{padding:0 16px}
  .section{padding:52px 0}
  .hero-main{padding:26px 20px 24px}
  .hero-side{flex-direction:column}
  .hero-figure img{height:200px}
  .metrics{grid-template-columns:1fr}
  .entries{grid-template-columns:1fr}
  .audience{grid-template-columns:1fr}
  .local-grid{grid-template-columns:1fr}
  .matrix-side{grid-template-columns:1fr}
  .guard{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}
  .step::after{display:none}
  .footer-grid{grid-template-columns:1fr}
  .quick-search-form{flex-direction:column;align-items:stretch}
  .quick-search-form .btn{width:100%}
  .hero-actions .btn{flex:1 1 100%}
  .brand-sub{font-size:10.5px}
  .tl-node{flex:0 0 170px}
  .compare-col{padding:24px 20px}
  .faq-a{padding-left:20px}
  .footer-bottom{flex-direction:column;gap:6px}
}

/* roulang page: article */
:root{
  --brand:#143D34;
  --brand-dark:#0E2C26;
  --accent:#C4703C;
  --accent-dark:#9E5528;
  --sand:#F5EFE3;
  --page:#FBF8F1;
  --card:#FFFFFF;
  --line:#E3DCCE;
  --ink:#1E2422;
  --ink-2:#5C665F;
  --ink-3:#8A928B;
  --ok:#3F6F5B;
  --ok-bg:#EEF3EF;
  --r-lg:16px;
  --r-md:12px;
  --r-sm:10px;
  --sh-1:0 1px 2px rgba(20,61,52,.06);
  --sh-2:0 10px 26px -14px rgba(20,61,52,.28);
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--page);
  color:var(--ink);
  font-family:system-ui,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",sans-serif;
  font-size:16px;
  line-height:1.9;
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%;height:auto}
ul,ol{margin:0;padding:0}
a{color:var(--brand);text-decoration:none}
button{font:inherit;color:inherit}
input,select,textarea{font:inherit;color:inherit}
h1,h2,h3,h4,p{margin:0}
.wrap{max-width:1200px;margin:0 auto;padding:0 20px}
.section{padding:88px 0}
.section--white{background:#fff}
.section--sand{background:var(--sand)}
.section--tight{padding:64px 0}
.eyebrow{
  display:block;
  font-size:12px;
  font-weight:600;
  letter-spacing:.12em;
  color:var(--accent);
  margin-bottom:8px;
}
.lead{color:var(--ink-2);line-height:1.9}
.muted{color:var(--ink-3);font-size:13px;line-height:1.75}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:18px;margin-bottom:38px}
.section-title{font-size:clamp(23px,2.6vw,32px);font-weight:700;line-height:1.35}
.section-note{max-width:420px;color:var(--ink-2);font-size:14px;line-height:1.8}
.card{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  box-shadow:var(--sh-1);
  transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
}
.card--hover:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:#d5cbb8}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border:1px solid transparent;border-radius:var(--r-sm);
  padding:11px 20px;font-size:15px;font-weight:600;line-height:1.4;
  cursor:pointer;text-align:center;
  transition:background .18s ease,color .18s ease,border-color .18s ease,box-shadow .18s ease,transform .12s ease;
}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:var(--brand-dark);box-shadow:0 12px 24px -16px rgba(20,61,52,.9)}
.btn-ghost{background:#fff;border-color:var(--brand);color:var(--brand)}
.btn-ghost:hover{background:var(--sand)}
.btn-accent{background:var(--accent);color:#fff}
.btn-accent:hover{background:var(--accent-dark)}
.btn-sm{padding:8px 14px;font-size:14px}
.btn:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.btn:active{transform:scale(.99)}
.btn-block{width:100%}
.text-link{
  display:inline-flex;align-items:center;gap:6px;
  font-size:14px;font-weight:600;color:var(--brand);
}
.text-link:hover{text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px}
.text-link::after{content:"→";font-size:13px;color:var(--accent)}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  border-radius:999px;padding:3px 11px;
  font-size:12px;font-weight:600;line-height:1.4;
  background:rgba(196,112,60,.13);color:var(--accent-dark);
}
.badge--soft{background:var(--ok-bg);color:var(--brand)}
.chip{
  display:inline-flex;align-items:center;
  border-radius:999px;border:1px solid var(--line);
  background:#fff;padding:4px 12px;
  font-size:12px;font-weight:500;line-height:1.5;color:var(--ink-2);
}

/* header */
.site-header{position:sticky;top:0;z-index:60}
.topbar{background:#fff;border-bottom:1px solid var(--line);transition:box-shadow .2s ease}
.site-header.is-scrolled .topbar{box-shadow:0 2px 10px rgba(20,61,52,.08)}
.topbar-inner{
  max-width:1200px;margin:0 auto;padding:0 20px;
  height:64px;display:flex;align-items:center;gap:18px;
}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{
  width:36px;height:36px;border-radius:10px;
  background:var(--brand);color:#fff;
  display:flex;align-items:center;justify-content:center;
  font-size:17px;font-weight:700;
}
.brand-text{display:flex;flex-direction:column;line-height:1.25}
.brand-main{font-size:17px;font-weight:700;color:var(--brand)}
.brand-sub{font-size:11px;font-weight:500;color:var(--ink-3);letter-spacing:.02em}
.search-box{
  flex:1 1 auto;max-width:320px;
  display:flex;align-items:center;
  background:var(--sand);border:1px solid transparent;
  border-radius:999px;padding:4px 4px 4px 16px;
  transition:border-color .18s ease,background .18s ease;
}
.search-box:focus-within{border-color:var(--accent);background:#fff;box-shadow:0 0 0 3px rgba(196,112,60,.14)}
.search-box input{
  flex:1;border:0;background:transparent;outline:none;
  font-size:13.5px;line-height:1.6;color:var(--ink);min-width:0;
}
.search-box input::placeholder{color:var(--ink-3)}
.search-box button{
  flex-shrink:0;width:32px;height:32px;border-radius:999px;border:0;
  background:var(--brand);color:#fff;cursor:pointer;
  display:flex;align-items:center;justify-content:center;
  transition:background .18s ease;
}
.search-box button:hover{background:var(--brand-dark)}
.version-select{
  border:1px solid var(--line);background:#fff;border-radius:var(--r-sm);
  font-size:13px;font-weight:600;color:var(--brand);
  padding:6px 10px;cursor:pointer;outline:none;
  transition:border-color .18s ease;
}
.version-select:hover,.version-select:focus{border-color:var(--accent)}
.header-cta{margin-left:auto}
.menu-toggle{
  display:none;width:38px;height:38px;border-radius:var(--r-sm);
  border:1px solid var(--line);background:#fff;cursor:pointer;
  align-items:center;justify-content:center;font-size:16px;color:var(--brand);
}
.subnav{background:#fff;border-bottom:1px solid var(--line)}
.subnav-inner{
  max-width:1200px;margin:0 auto;padding:0 20px;
  height:38px;display:flex;align-items:center;gap:26px;
  overflow-x:auto;scrollbar-width:none;
}
.subnav-inner::-webkit-scrollbar{display:none}
.subnav-inner a{
  position:relative;flex-shrink:0;
  font-size:14px;font-weight:500;color:var(--ink-2);
  line-height:38px;padding:0 1px;
  transition:color .18s ease;
}
.subnav-inner a::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;
  background:var(--accent);transform:scaleX(0);transform-origin:left;
  transition:transform .2s ease;
}
.subnav-inner a:hover{color:var(--brand)}
.subnav-inner a:hover::after{transform:scaleX(1)}
.subnav-inner a.active{color:var(--brand);font-weight:600}
.subnav-inner a.active::after{transform:scaleX(1)}
.mobile-panel{
  display:none;background:#fff;border-bottom:1px solid var(--line);
  padding:16px 20px 20px;
}
.mobile-panel.is-open{display:block}
.mobile-panel .mp-row{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:14px}
.mobile-panel a.mp-link{
  display:block;padding:9px 2px;font-size:14.5px;color:var(--ink);
  border-bottom:1px dashed var(--line);
}
.mobile-panel a.mp-link:hover{color:var(--brand)}
.mobile-panel .mp-label{font-size:12px;letter-spacing:.1em;color:var(--ink-3);margin:6px 0 8px}
.lang-seg{display:inline-flex;border:1px solid var(--line);border-radius:999px;overflow:hidden}
.lang-seg button{
  border:0;background:#fff;padding:5px 12px;font-size:12px;color:var(--ink-2);cursor:pointer;
}
.lang-seg button.on{background:var(--brand);color:#fff}

/* breadcrumb */
.crumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  padding:20px 0 0;font-size:13px;color:var(--ink-3);
}
.crumb a{color:var(--ink-2)}
.crumb a:hover{color:var(--brand);text-decoration:underline;text-underline-offset:3px}
.crumb-sep{color:#c9c1b1}
.crumb-cur{color:var(--ink-2);max-width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* doc layout */
.doc-layout{
  max-width:1200px;margin:0 auto;padding:20px 20px 0;
  display:grid;grid-template-columns:240px minmax(0,1fr);gap:40px;align-items:start;
}
.doc-main{min-width:0}
.doc-side{position:sticky;top:104px;max-height:calc(100vh - 120px);overflow:auto;display:block}
.doc-side-inner{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
  padding:18px 16px;box-shadow:var(--sh-1);
}
.doc-side-close{display:none}
.doc-group{margin-bottom:16px}
.doc-group-title{
  font-size:11.5px;letter-spacing:.1em;font-weight:600;
  color:var(--ink-3);margin-bottom:10px;
}
.doc-list{list-style:none}
.doc-list li{margin:0}
.doc-list a{
  display:block;position:relative;
  padding:5px 8px 5px 12px;
  font-size:14px;line-height:1.9;color:var(--ink-2);
  border-left:3px solid transparent;border-radius:0 8px 8px 0;
  transition:background .16s ease,color .16s ease,border-color .16s ease;
}
.doc-list a:hover{background:var(--sand);border-left-color:var(--accent);color:var(--brand)}
.doc-list a.is-current{border-left-color:var(--accent);color:var(--brand);font-weight:600;background:var(--sand)}
.doc-cta{
  background:var(--sand);border-radius:var(--r-md);padding:14px;
  margin-top:6px;
}
.doc-cta p{font-size:12.5px;line-height:1.75;color:var(--ink-2);margin-bottom:10px}
.doc-toggle{
  display:none;align-items:center;gap:6px;
  border:1px solid var(--line);background:#fff;border-radius:var(--r-sm);
  padding:7px 13px;font-size:13px;font-weight:600;color:var(--brand);cursor:pointer;
}
.doc-toggle:hover{background:var(--sand)}

/* article head */
.article-head{padding:22px 0 4px}
.article-head-top{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-bottom:14px}
.article-h1{
  font-size:clamp(26px,3.4vw,38px);font-weight:700;line-height:1.35;letter-spacing:.01em;
  color:var(--ink);word-break:break-word;
}
.meta-bar{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px 14px;
  margin-top:16px;font-size:13px;color:var(--ink-3);
}
.meta-bar .dot{width:1px;height:12px;background:var(--line);display:inline-block}
.article-lead{
  margin-top:18px;padding:18px 20px;
  background:var(--sand);border-radius:var(--r-md);
  font-size:15px;line-height:1.9;color:var(--ink-2);
}

/* article body */
.article-body{
  margin-top:26px;max-width:760px;
  font-size:16px;line-height:1.95;color:var(--ink);
  word-break:break-word;
}
.article-body h2{
  font-size:clamp(20px,2.2vw,26px);font-weight:700;line-height:1.4;
  margin:36px 0 14px;padding-left:12px;border-left:4px solid var(--accent);
  color:var(--ink);scroll-margin-top:120px;
}
.article-body h3{font-size:18px;font-weight:600;line-height:1.5;margin:26px 0 10px;scroll-margin-top:120px}
.article-body h4{font-size:16px;font-weight:600;margin:20px 0 8px}
.article-body p{margin:20px 0}
.article-body a{color:var(--brand);text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px}
.article-body a:hover{color:var(--accent-dark)}
.article-body ul,.article-body ol{margin:20px 0;padding-left:1.4em}
.article-body li{margin:10px 0}
.article-body ul li::marker{color:var(--accent)}
.article-body ol li::marker{color:var(--accent);font-weight:600}
.article-body blockquote{
  margin:24px 0;background:var(--sand);
  border-left:3px solid var(--brand);
  padding:20px;border-radius:0 var(--r-md) var(--r-md) 0;
  color:var(--ink-2);
}
.article-body blockquote p:first-child{margin-top:0}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body table{
  width:100%;border-collapse:collapse;margin:24px 0;
  border-radius:12px;overflow:hidden;font-size:15px;line-height:1.75;
  border:1px solid var(--line);
}
.article-body thead th{background:var(--brand);color:#fff;text-align:left;padding:12px 14px;font-weight:600}
.article-body tbody td{padding:11px 14px;border-top:1px solid var(--line);vertical-align:top}
.article-body tbody tr:nth-child(even){background:var(--sand)}
.article-body img{border-radius:12px;margin:24px auto}
.article-body code{
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  background:var(--sand);border-radius:8px;padding:2px 6px;font-size:14px;
}
.article-body pre{
  background:var(--sand);border-radius:8px;padding:16px;
  overflow-x:auto;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-size:14px;line-height:1.8;
}
.article-body hr{border:0;border-top:1px solid var(--line);margin:32px 0}

/* empty state */
.empty-state{
  margin-top:30px;padding:56px 24px;text-align:center;
  background:#fff;border:1px dashed var(--line);border-radius:var(--r-lg);
}
.empty-state .empty-title{font-size:18px;font-weight:600;color:var(--ink);margin-bottom:10px}
.empty-state .empty-desc{font-size:14px;color:var(--ink-2);margin-bottom:20px}

/* review card */
.review-card{
  margin-top:40px;background:var(--sand);
  border-radius:var(--r-lg);padding:26px 26px 22px;
  max-width:760px;
}
.review-card h2{font-size:20px;font-weight:700;margin-bottom:14px;color:var(--ink)}
.review-card ul{list-style:none;padding:0;margin:0}
.review-card li{
  position:relative;padding-left:22px;margin:10px 0;
  font-size:15px;line-height:1.9;color:var(--ink-2);
}
.review-card li::before{
  content:"";position:absolute;left:0;top:11px;
  width:8px;height:8px;border-radius:2px;background:var(--accent);
}
.review-foot{display:flex;justify-content:flex-end;margin-top:18px}

/* download */
.dl-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.dl-card{
  display:flex;flex-direction:column;gap:6px;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
  padding:24px 22px;box-shadow:var(--sh-1);
  transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
}
.dl-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:#d5cbb8}
.dl-card .dl-icon{
  width:42px;height:42px;border-radius:12px;background:var(--ok-bg);
  display:flex;align-items:center;justify-content:center;
  color:var(--brand);font-size:18px;font-weight:700;margin-bottom:6px;
}
.dl-card .dl-title{font-size:18px;font-weight:600;color:var(--ink)}
.dl-card .dl-file{font-size:12.5px;color:var(--ink-3);font-family:ui-monospace,Menlo,Consolas,monospace}
.dl-card .dl-desc{font-size:13.5px;line-height:1.8;color:var(--ink-2);margin-top:4px}
.dl-card .dl-go{
  margin-top:14px;font-size:14px;font-weight:600;color:var(--accent-dark);
  display:inline-flex;align-items:center;gap:6px;
}
.dl-card .dl-go::after{content:"↓";color:var(--accent)}
.dl-note{
  margin-top:22px;font-size:12.5px;line-height:1.8;color:var(--ink-3);
  display:flex;flex-wrap:wrap;gap:6px 18px;
}

/* next read */
.next-list{display:grid;gap:12px;max-width:860px}
.next-item{
  display:flex;align-items:center;gap:16px;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
  padding:16px 20px;box-shadow:var(--sh-1);
  transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
}
.next-item:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:#d5cbb8}
.next-item .ni-body{flex:1;min-width:0}
.next-item .ni-title{font-size:16px;font-weight:600;color:var(--ink);line-height:1.5}
.next-item:hover .ni-title{color:var(--brand)}
.next-item .ni-desc{font-size:13px;color:var(--ink-2);margin-top:4px;line-height:1.7}
.next-item .ni-arrow{color:var(--accent);font-size:16px;flex-shrink:0}

/* closing */
.closing{
  text-align:center;max-width:720px;margin:0 auto;
}
.closing-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:center;margin-top:22px}
.closing-note{margin-top:20px;font-size:12.5px;color:var(--ink-3);line-height:1.8}

/* footer */
.site-footer{background:var(--brand);color:#fff;padding:64px 0 28px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:36px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand .brand-mark{background:rgba(255,255,255,.14);color:#F5EFE3}
.footer-brand .brand-main{color:#fff}
.footer-brand .brand-sub{color:rgba(245,239,227,.7)}
.footer-desc{color:rgba(245,239,227,.72);font-size:14px;line-height:1.85;max-width:360px}
.footer-col h4{
  font-size:14px;font-weight:600;margin-bottom:14px;color:#F5EFE3;letter-spacing:.02em;
}
.footer-col ul{list-style:none}
.footer-col a{
  display:inline-block;font-size:14px;line-height:2;
  color:rgba(245,239,227,.78);
  transition:color .18s ease,transform .18s ease;
}
.footer-col a:hover{color:#fff;transform:translateX(2px);text-decoration:none}
.footer-divider{margin-top:44px;padding-top:22px;border-top:1px solid rgba(255,255,255,.12)}
.footer-tags{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:18px}
.footer-tags a{
  font-size:12px;color:rgba(245,239,227,.8);
  border:1px solid rgba(255,255,255,.18);border-radius:999px;padding:3px 12px;
  transition:background .18s ease,color .18s ease;
}
.footer-tags a:hover{background:rgba(255,255,255,.12);color:#fff;text-decoration:none}
.footer-bottom{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:8px 24px;
  font-size:12px;color:rgba(245,239,227,.6);line-height:1.8;
}

@media (max-width:1024px){
  .dl-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:1279px){
  .doc-layout{grid-template-columns:minmax(0,1fr);gap:0;padding-top:16px}
  .doc-side{display:none}
  .doc-side.is-open{
    display:block;position:fixed;inset:0;z-index:90;
    background:rgba(20,61,52,.35);max-height:none;overflow:auto;
    padding:16px;top:0;
  }
  .doc-side.is-open .doc-side-inner{
    background:#fff;max-width:340px;margin:0 auto;position:relative;
    max-height:80vh;overflow:auto;
  }
  .doc-side-close{
    display:inline-flex;align-items:center;justify-content:center;
    position:absolute;top:8px;right:8px;width:30px;height:30px;
    border-radius:8px;border:1px solid var(--line);background:#fff;
    color:var(--ink-2);cursor:pointer;font-size:15px;
  }
  .doc-toggle{display:inline-flex;margin-top:16px}
  .article-body{max-width:none}
  .review-card{max-width:none}
}
@media (max-width:900px){
  .section{padding:56px 0}
  .section--tight{padding:48px 0}
}
@media (max-width:720px){
  .topbar-inner{height:56px;gap:10px;padding:0 16px}
  .search-box{display:none}
  .version-select{display:none}
  .header-cta{display:none}
  .menu-toggle{display:flex;margin-left:auto}
  .brand-main{font-size:16px}
  .brand-sub{font-size:10.5px}
  .subnav-inner{padding:0 16px;gap:20px}
  .wrap{padding:0 16px}
  .doc-layout{padding-left:16px;padding-right:16px}
  .dl-grid{gap:14px}
  .next-item{padding:14px 16px;gap:12px}
  .section{padding:52px 0}
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .site-footer{padding:48px 0 24px}
  .article-body table{display:block;overflow-x:auto;white-space:nowrap}
  .meta-bar{font-size:12.5px}
}
@media (max-width:520px){
  .article-h1{font-size:24px}
  .closing-actions .btn{width:100%}
  .dl-card{padding:20px 18px}
}

/* roulang page: category1 */
:root{
  --brand:#143D34;
  --brand-dark:#0E2C26;
  --accent:#C4703C;
  --accent-dark:#9E5528;
  --sand:#F5EFE3;
  --page:#FBF8F1;
  --card:#FFFFFF;
  --line:#E3DCCE;
  --ink:#1E2422;
  --ink-2:#5C665F;
  --ink-3:#8A928B;
  --ok:#3F6F5B;
  --ok-bg:#EEF3EF;
  --r-lg:16px;
  --r-md:12px;
  --r-sm:10px;
  --sh-1:0 1px 2px rgba(20,61,52,.06);
  --sh-2:0 10px 26px -14px rgba(20,61,52,.28);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--page);
  color:var(--ink);
  font-family:system-ui,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",sans-serif;
  font-size:16px;
  line-height:1.9;
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%;height:auto}
ul,ol{margin:0;padding:0;list-style:none}
a{color:var(--brand);text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
p{margin:0 0 18px}
p:last-child{margin-bottom:0}
.wrap{width:100%;max-width:1200px;margin:0 auto;padding-left:20px;padding-right:20px}
.doc-wrap{width:100%;max-width:1280px;margin:0 auto;padding:0 20px;display:grid;grid-template-columns:minmax(0,1fr);gap:0}
@media(min-width:1280px){
  .doc-wrap{grid-template-columns:240px minmax(0,1fr);gap:40px;align-items:start}
}
/* header */
.site-header{position:sticky;top:0;z-index:60}
.topbar{background:#fff;border-bottom:1px solid var(--line);transition:box-shadow .2s ease}
.site-header.is-scrolled .topbar{box-shadow:0 2px 10px rgba(20,61,52,.08)}
.topbar-inner{max-width:1200px;margin:0 auto;padding:0 20px;height:64px;display:flex;align-items:center;gap:18px}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{width:36px;height:36px;border-radius:10px;background:var(--brand);color:#fff;display:flex;align-items:center;justify-content:center;font-size:17px;font-weight:700}
.brand-text{display:flex;flex-direction:column;line-height:1.25}
.brand-main{font-size:17px;font-weight:700;color:var(--brand)}
.brand-sub{font-size:11px;font-weight:500;color:var(--ink-3);letter-spacing:.02em}
.search-box{flex:1 1 auto;max-width:320px;display:flex;align-items:center;background:var(--sand);border:1px solid transparent;border-radius:999px;padding:4px 4px 4px 16px;transition:border-color .18s ease,background .18s ease,box-shadow .18s ease}
.search-box:focus-within{border-color:var(--accent);background:#fff;box-shadow:0 0 0 3px rgba(196,112,60,.14)}
.search-box input{flex:1;border:0;background:transparent;outline:none;font-size:13.5px;line-height:1.6;color:var(--ink);min-width:0}
.search-box input::placeholder{color:var(--ink-3)}
.search-box button{flex-shrink:0;width:32px;height:32px;border-radius:999px;border:0;background:var(--brand);color:#fff;cursor:pointer;font-size:13px;display:flex;align-items:center;justify-content:center;transition:background .18s ease}
.search-box button:hover{background:var(--brand-dark)}
.top-actions{display:flex;align-items:center;gap:10px;margin-left:auto;flex-shrink:0}
.version-select{border:1px solid var(--line);background:#fff;border-radius:var(--r-sm);font-size:13px;font-weight:600;color:var(--brand);padding:6px 10px;cursor:pointer;outline:none;transition:border-color .18s ease}
.version-select:hover,.version-select:focus{border-color:var(--accent)}
.lang-switch{display:inline-flex;border:1px solid var(--line);border-radius:999px;overflow:hidden;background:#fff}
.lang-switch span{font-size:12px;line-height:1.6;padding:5px 10px;color:var(--ink-3)}
.lang-switch span.on{background:var(--sand);color:var(--brand);font-weight:600}
.menu-toggle{display:none;width:38px;height:38px;border-radius:var(--r-sm);border:1px solid var(--line);background:#fff;cursor:pointer;align-items:center;justify-content:center;font-size:16px;color:var(--brand)}
.subnav{background:#fff;border-bottom:1px solid var(--line)}
.subnav-inner{max-width:1200px;margin:0 auto;padding:0 20px;height:38px;display:flex;align-items:center;gap:26px;overflow-x:auto;scrollbar-width:none}
.subnav-inner::-webkit-scrollbar{display:none}
.subnav-inner a{position:relative;flex-shrink:0;font-size:14px;font-weight:500;color:var(--ink-2);line-height:38px;padding:0 1px;transition:color .18s ease}
.subnav-inner a::after{content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--accent);transform:scaleX(0);transform-origin:left;transition:transform .2s ease}
.subnav-inner a:hover{color:var(--brand)}
.subnav-inner a:hover::after{transform:scaleX(1)}
.subnav-inner a.active{color:var(--brand);font-weight:600}
.subnav-inner a.active::after{transform:scaleX(1)}
.mobile-panel{display:none;background:#fff;border-bottom:1px solid var(--line);padding:16px 20px 20px}
.mobile-panel.open{display:block}
.mobile-panel a{display:block;padding:9px 0;font-size:15px;color:var(--ink-2);border-bottom:1px dashed var(--line)}
.mobile-panel a:last-of-type{border-bottom:0}
.mobile-panel .btn{margin-top:14px}
/* components */
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--sh-1);transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease}
.card--hover:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:#d5cbb8}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid transparent;border-radius:var(--r-sm);padding:11px 20px;font-size:15px;font-weight:600;line-height:1.4;cursor:pointer;text-align:center;transition:background .18s ease,color .18s ease,border-color .18s ease,box-shadow .18s ease,transform .12s ease}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:var(--brand-dark);box-shadow:0 12px 24px -16px rgba(20,61,52,.9)}
.btn-ghost{background:#fff;border-color:var(--brand);color:var(--brand)}
.btn-ghost:hover{background:var(--sand)}
.btn-accent{background:var(--accent);color:#fff}
.btn-accent:hover{background:var(--accent-dark)}
.btn-sm{padding:8px 14px;font-size:14px}
.btn-block{width:100%}
.btn:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.btn:active{transform:scale(.99)}
.text-link{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--brand)}
.text-link:hover{text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px}
.text-link::after{content:"→";font-size:13px;color:var(--accent)}
.badge{display:inline-flex;align-items:center;gap:6px;border-radius:999px;padding:3px 11px;font-size:12px;font-weight:600;line-height:1.4;background:rgba(196,112,60,.13);color:var(--accent-dark)}
.badge--soft{background:var(--ok-bg);color:var(--brand)}
.chip{display:inline-flex;align-items:center;border-radius:999px;border:1px solid var(--line);background:#fff;padding:4px 12px;font-size:12px;font-weight:500;line-height:1.5;color:var(--ink-2)}
.eyebrow{display:block;font-size:12px;font-weight:600;letter-spacing:.12em;color:var(--accent);margin-bottom:8px}
.muted{color:var(--ink-3);font-size:13px;line-height:1.75}
/* crumb */
.crumb-bar{background:#fff;border-bottom:1px solid var(--line)}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--ink-3);padding:12px 0;flex-wrap:wrap}
.breadcrumb a{color:var(--ink-2)}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb .sep{color:var(--line)}
.breadcrumb .current{color:var(--ink-3)}
/* category hero */
.cat-hero{background:var(--sand);border-bottom:1px solid var(--line);padding:34px 0 42px}
.cat-hero .kicker{display:inline-flex;align-items:center;gap:8px;background:#fff;border:1px solid var(--line);border-radius:999px;padding:4px 14px;font-size:12px;font-weight:600;letter-spacing:.1em;color:var(--accent-dark)}
.cat-hero h1{font-size:clamp(25px,3.4vw,36px);font-weight:700;line-height:1.36;letter-spacing:.01em;color:var(--brand);margin:14px 0 14px;max-width:900px}
.cat-hero .hero-lead{max-width:880px;color:var(--ink-2);font-size:15.5px;line-height:1.95}
.stat-chips{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}
.stat-chip{display:inline-flex;align-items:baseline;gap:6px;background:#fff;border:1px solid var(--line);border-radius:999px;padding:6px 15px;font-size:13px;color:var(--ink-2)}
.stat-chip strong{font-size:15px;font-weight:700;color:var(--accent-dark)}
/* doc main */
.doc-main{min-width:0;padding-bottom:24px}
.doc-main .section{padding:52px 0;border-bottom:1px solid var(--line)}
.doc-main .section:last-child{border-bottom:0}
.doc-main h2{position:relative;font-size:clamp(21px,2.3vw,27px);font-weight:700;line-height:1.42;color:var(--brand);margin:0 0 12px;padding-left:14px}
.doc-main h2::before{content:"";position:absolute;left:0;top:.28em;bottom:.28em;width:4px;border-radius:2px;background:var(--accent)}
.doc-main h3{font-size:17px;font-weight:600;line-height:1.55;margin:0 0 8px}
.section-intro{color:var(--ink-2);font-size:15px;line-height:1.9;max-width:820px;margin-bottom:26px}
/* overview strip */
.overview{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--sh-1)}
.overview-item{padding:20px 18px;border-left:1px dashed var(--line)}
.overview-item:first-child{border-left:0}
.overview-item h3{font-size:15px;color:var(--brand);margin-bottom:6px;display:flex;align-items:center;gap:8px}
.overview-item h3 .dot{width:7px;height:7px;border-radius:999px;background:var(--accent);flex-shrink:0}
.overview-item p{font-size:13.5px;color:var(--ink-2);line-height:1.8;margin:0}
/* post grid */
.post-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}
.post-card{display:flex;flex-direction:column;padding:22px;height:100%}
.post-card h3{font-size:17.5px;line-height:1.55;font-weight:600;margin:12px 0 8px}
.post-card h3 a{color:var(--ink)}
.post-card:hover h3 a{color:var(--brand)}
.post-card .excerpt{font-size:14px;color:var(--ink-2);line-height:1.85;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;margin-bottom:0}
.post-meta{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-top:16px;padding-top:14px;border-top:1px dashed var(--line);font-size:12.5px;color:var(--ink-3)}
.empty-state{border:1px dashed var(--line);border-radius:var(--r-lg);background:#fff;padding:48px 24px;text-align:center}
.empty-state p{color:var(--ink-2);margin-bottom:8px}
.grid-foot{display:flex;justify-content:center;margin-top:32px}
/* definition list */
.def-grid{display:grid;grid-template-columns:210px minmax(0,1fr);background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--sh-1)}
.def-grid dt{padding:16px 18px;font-weight:600;color:var(--brand);border-bottom:1px dashed var(--line);border-right:1px dashed var(--line);font-size:15px}
.def-grid dd{margin:0;padding:16px 18px;border-bottom:1px dashed var(--line);color:var(--ink-2);font-size:14.5px;line-height:1.9}
.def-grid dt:nth-last-of-type(1),.def-grid dd:nth-last-of-type(1){border-bottom:0}
/* steps */
.steps-layout{display:grid;grid-template-columns:320px minmax(0,1fr);gap:32px;align-items:start}
.figure{border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--line);background:#fff;box-shadow:var(--sh-1)}
.figure figcaption{padding:12px 14px;font-size:12.5px;color:var(--ink-3);line-height:1.7;border-top:1px solid var(--line)}
.step{display:grid;grid-template-columns:44px minmax(0,1fr);gap:16px;position:relative;padding-bottom:26px}
.step:last-child{padding-bottom:0}
.step::before{content:"";position:absolute;left:21px;top:46px;bottom:2px;width:2px;background:var(--line)}
.step:last-child::before{display:none}
.step-num{width:44px;height:44px;border-radius:999px;background:var(--sand);border:1px solid var(--line);color:var(--brand);font-weight:700;display:flex;align-items:center;justify-content:center;font-size:15px;flex-shrink:0}
.step h3{margin:6px 0 4px;font-size:16.5px;color:var(--ink)}
.step p{margin:0;font-size:14px;color:var(--ink-2);line-height:1.85}
/* faq */
.faq-item{border:1px solid var(--line);border-radius:var(--r-md);background:#fff;margin-bottom:12px;overflow:hidden;transition:border-color .18s ease,box-shadow .18s ease}
.faq-item:hover{border-color:#d5cbb8}
.faq-item summary{list-style:none;cursor:pointer;padding:16px 18px;display:flex;align-items:center;gap:12px;font-weight:600;font-size:15.5px;color:var(--ink)}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary .sign{margin-left:auto;color:var(--accent);font-weight:700;font-size:18px;line-height:1;transition:transform .2s ease}
.faq-item[open] summary .sign{transform:rotate(45deg)}
.faq-body{padding:14px 18px 18px;color:var(--ink-2);font-size:14.5px;line-height:1.9;background:#FBF8F1;border-top:1px dashed var(--line)}
/* related */
.related-list{background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--sh-1)}
.related-list li + li{border-top:1px dashed var(--line)}
.related-list a{display:flex;align-items:center;gap:14px;padding:16px 18px;transition:background .18s ease}
.related-list a:hover{background:var(--sand)}
.rel-title{flex:1 1 auto;min-width:0;font-size:15px;font-weight:600;color:var(--ink);line-height:1.6}
.related-list a:hover .rel-title{color:var(--brand)}
.rel-time{flex-shrink:0;font-size:12.5px;color:var(--ink-3)}
.rel-arrow{flex-shrink:0;color:var(--accent);font-size:14px}
/* downloads */
.dl-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.dl-card{display:flex;flex-direction:column;padding:24px;height:100%}
.dl-card .dl-icon{width:44px;height:44px;border-radius:12px;background:var(--sand);color:var(--brand);display:flex;align-items:center;justify-content:center;font-size:16px;font-weight:700;margin-bottom:14px}
.dl-card h3{font-size:17px;margin-bottom:6px}
.dl-card p{font-size:13.5px;color:var(--ink-2);line-height:1.8;margin-bottom:18px}
.dl-card .btn{margin-top:auto}
/* end cta */
.end-cta{background:var(--sand);border:1px solid var(--line);border-radius:var(--r-lg);padding:42px 26px;text-align:center}
.end-cta h2{padding-left:0;margin-bottom:10px}
.end-cta h2::before{display:none}
.end-cta p{color:var(--ink-2);font-size:15px;max-width:640px;margin:0 auto 22px}
.end-actions{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;align-items:center}
.end-note{max-width:720px;margin:20px auto 0;font-size:12.5px;color:var(--ink-3);line-height:1.8}
/* aside */
.doc-aside{display:none}
@media(min-width:1280px){.doc-aside{display:block}}
.doc-aside-inner{position:sticky;top:118px;max-height:calc(100vh - 140px);overflow-y:auto;padding-right:6px;scrollbar-width:thin}
.doc-aside-inner::-webkit-scrollbar{width:6px}
.doc-aside-inner::-webkit-scrollbar-thumb{background:#d9d1c1;border-radius:999px}
.aside-title{font-size:11.5px;font-weight:600;letter-spacing:.1em;color:var(--ink-3);margin:0 0 10px}
.aside-nav li a{display:block;font-size:14px;line-height:1.9;color:var(--ink-2);padding:5px 10px;border-left:3px solid transparent;border-radius:0 8px 8px 0;transition:background .18s ease,color .18s ease,border-color .18s ease}
.aside-nav li a:hover{background:var(--sand);border-left-color:var(--accent);color:var(--brand)}
.aside-nav li a.is-active{border-left-color:var(--accent);color:var(--brand);font-weight:600;background:rgba(245,239,227,.7)}
.aside-card{margin-top:22px;background:var(--sand);border:1px solid var(--line);border-radius:var(--r-md);padding:16px}
.aside-card p{font-size:13px;color:var(--ink-2);line-height:1.8;margin-bottom:12px}
/* footer */
.site-footer{background:var(--brand);color:#E8EFEA;padding:60px 0 26px;margin-top:24px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:34px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.footer-brand .brand-mark{background:#fff;color:var(--brand)}
.footer-brand .brand-main{color:#fff}
.footer-brand .brand-sub{color:rgba(232,239,234,.66)}
.footer-desc{font-size:13.5px;line-height:1.9;color:rgba(232,239,234,.76);margin:0;max-width:340px}
.footer-col h4{font-size:13px;font-weight:600;letter-spacing:.08em;color:#fff;margin:0 0 12px}
.footer-col li{margin-bottom:6px}
.footer-col a{display:inline-block;font-size:14px;line-height:2;color:rgba(232,239,234,.78);transition:color .18s ease,transform .18s ease}
.footer-col a:hover{color:#fff;transform:translateX(2px)}
.footer-divider{margin-top:38px;padding-top:22px;border-top:1px solid rgba(255,255,255,.12)}
.footer-tags{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:18px}
.footer-tags a{display:inline-flex;border:1px solid rgba(255,255,255,.2);border-radius:999px;padding:4px 12px;font-size:12px;color:rgba(232,239,234,.8);transition:background .18s ease,color .18s ease}
.footer-tags a:hover{background:rgba(255,255,255,.1);color:#fff}
.footer-bottom{display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;font-size:12.5px;color:rgba(232,239,234,.62);line-height:1.8}
/* responsive */
@media(max-width:1023px){
  .overview{grid-template-columns:repeat(2,minmax(0,1fr))}
  .overview-item:nth-child(3){border-left:0}
  .overview-item:nth-child(1),.overview-item:nth-child(2){border-bottom:1px dashed var(--line)}
  .post-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .steps-layout{grid-template-columns:1fr}
  .dl-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px}
  .search-box{display:none}
}
@media(max-width:767px){
  .top-actions{display:none}
  .menu-toggle{display:flex}
  .topbar-inner{height:56px}
  .subnav-inner{gap:20px}
  .cat-hero{padding:26px 0 34px}
  .doc-main .section{padding:40px 0}
  .def-grid{grid-template-columns:1fr}
  .def-grid dt{border-right:0;padding-bottom:4px;border-bottom:0}
  .def-grid dd{padding-top:0}
  .post-grid{grid-template-columns:1fr}
  .dl-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column}
  .related-list a{flex-wrap:wrap;gap:6px}
  .rel-title{flex:1 1 100%}
}
@media(max-width:520px){
  .wrap,.doc-wrap{padding-left:16px;padding-right:16px}
  .overview{grid-template-columns:1fr}
  .overview-item{border-left:0;border-bottom:1px dashed var(--line)}
  .overview-item:last-child{border-bottom:0}
  .cat-hero h1{font-size:23px}
  .btn{width:100%}
  .end-actions .btn{width:100%}
  .post-meta{flex-wrap:wrap}
}