/* roulang page: index */
:root{
  --ink:#123C36;
  --ink-dark:#0C2A26;
  --ink-soft:#2C5B54;
  --lime:#C2E63C;
  --paper:#F7F6F2;
  --card:#FFFFFF;
  --sub:#EFEDE7;
  --line:#E2DFD7;
  --text:#1B1F1D;
  --muted:#626B66;
  --deep:#0E1A18;
  --r-btn:6px;
  --r-card:8px;
  --r-big:12px;
  --r-badge:2px;
  --sh-1:0 1px 2px rgba(14,26,24,.05);
  --sh-2:0 12px 32px -12px rgba(14,26,24,.18);
  --sec-pad:88px;
  --bs-body-bg:var(--paper);
  --bs-body-color:var(--text);
  --bs-primary:var(--ink);
  --bs-link-color:var(--ink);
  --bs-link-hover-color:var(--ink-dark);
  --bs-border-radius:6px;
  --bs-font-sans-serif:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",sans-serif;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--paper);color:var(--text);
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",sans-serif;
  font-size:16.5px;line-height:1.9;letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:var(--ink);text-decoration:none;transition:color .22s ease,border-color .22s ease}
a:hover{color:var(--ink-dark)}
button,input{font-family:inherit}
:focus-visible{outline:2px solid var(--lime);outline-offset:2px}
.container{width:100%;max-width:1280px;margin:0 auto;padding:0 24px}
.num{font-variant-numeric:tabular-nums;letter-spacing:.02em}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;height:76px;
  background:rgba(255,255,255,.86);backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);transition:box-shadow .25s ease;
}
.site-header.is-scrolled{box-shadow:0 6px 24px -16px rgba(14,26,24,.35)}
.nav-grid{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;height:76px;gap:16px}
.nav-left{display:flex;align-items:center;gap:26px}
.nav-right{display:flex;align-items:center;justify-content:flex-end;gap:18px}
.nav-link-x{
  position:relative;font-size:15px;font-weight:500;color:var(--ink);padding:6px 0;
  white-space:nowrap;
}
.nav-link-x::after{
  content:"";position:absolute;left:0;bottom:0;height:2px;width:0;background:var(--lime);
  transition:width .22s ease;
}
.nav-link-x:hover::after,.nav-link-x.active::after{width:100%}
.nav-link-x.active{font-weight:700}
.nav-link-x.active::before{
  content:"";position:absolute;left:-10px;top:10px;width:3px;height:16px;background:var(--lime);
}
.brand{
  display:inline-flex;align-items:center;height:40px;font-size:19px;font-weight:700;
  color:var(--ink);letter-spacing:.01em;white-space:nowrap;
}
.brand span{position:relative}
.brand span::after{
  content:"";position:absolute;left:0;right:0;bottom:2px;height:5px;background:var(--lime);
  opacity:.55;z-index:-1;
}
.brand:hover{color:var(--ink-dark)}
.icon-btn{
  width:44px;height:44px;display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--line);border-radius:var(--r-btn);background:transparent;color:var(--ink);
  cursor:pointer;transition:background .2s ease,border-color .2s ease;
}
.icon-btn:hover{background:var(--sub);border-color:var(--ink-soft)}
.btn-x{
  display:inline-flex;align-items:center;gap:8px;height:46px;padding:0 24px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;
  position:relative;overflow:hidden;transition:transform .18s ease,background .22s ease,color .22s ease,border-color .22s ease;
}
.btn-x:active{transform:scale(.985)}
.btn-primary-x{background:var(--ink);color:#fff}
.btn-primary-x:hover{background:var(--ink-dark);color:#fff}
.btn-primary-x::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--lime);
  transform:translateX(-100%);transition:transform .26s ease;
}
.btn-primary-x:hover::after{transform:translateX(0)}
.btn-ghost-x{background:transparent;color:var(--ink);border-color:var(--ink)}
.btn-ghost-x:hover{background:rgba(18,60,54,.08);color:var(--ink-dark)}
.btn-lime-x{background:var(--lime);color:var(--ink);border-color:var(--lime)}
.btn-lime-x:hover{background:#d3f24f;color:var(--ink-dark)}
.btn-outline-light-x{background:transparent;color:#fff;border-color:rgba(255,255,255,.5)}
.btn-outline-light-x:hover{background:rgba(255,255,255,.1);color:#fff;border-color:#fff}
.btn-x .arw{display:inline-block;transition:transform .22s ease}
.btn-x:hover .arw{transform:translateX(3px)}
.btn-compact{height:42px;padding:0 18px;font-size:14.5px}

/* mobile nav */
.hamburger{display:none}
.offcanvas-x{
  background:var(--paper);
  --bs-offcanvas-width:320px;
}
.offcanvas-x .offcanvas-header{border-bottom:1px solid var(--line);padding:18px 22px}
.offcanvas-x .offcanvas-body{padding:0 0 96px}
.m-nav-list{list-style:none;margin:0;padding:0}
.m-nav-list li{border-bottom:1px solid var(--line)}
.m-nav-list a{
  display:flex;align-items:center;justify-content:space-between;height:48px;padding:0 22px;
  font-size:15.5px;font-weight:500;color:var(--ink);
}
.m-nav-list a:hover{background:var(--sub)}
.m-nav-foot{
  position:fixed;left:0;right:0;bottom:0;padding:14px 22px;background:var(--paper);
  border-top:1px solid var(--line);
}

/* ---------- hero ---------- */
.hero{padding:72px 0 64px;border-bottom:1px solid var(--line);background:
  linear-gradient(180deg,rgba(239,237,231,.55),rgba(247,246,242,0) 62%)}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:56px;align-items:center}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;font-size:13px;font-weight:600;
  letter-spacing:.08em;color:var(--ink-soft);border:1px solid var(--line);border-radius:var(--r-badge);
  background:#fff;padding:6px 12px;margin-bottom:22px;
}
.eyebrow i{width:6px;height:6px;background:var(--lime);display:inline-block}
h1{
  font-size:clamp(30px,5vw,54px);line-height:1.12;font-weight:700;margin:0 0 20px;
  color:var(--ink);letter-spacing:-.01em;
}
.hero-sub{font-size:17.5px;color:var(--muted);margin:0 0 30px;max-width:560px;line-height:1.85}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:38px}
.hero-metrics{display:flex;gap:0;border-top:1px solid var(--line);padding-top:22px;flex-wrap:wrap}
.metric{padding-right:34px;margin-right:34px;border-right:1px solid var(--line)}
.metric:last-child{border-right:0;margin-right:0;padding-right:0}
.metric b{display:block;font-size:26px;font-weight:700;color:var(--ink);line-height:1.2}
.metric span{font-size:13px;color:var(--muted)}
.hero-media{position:relative;border-radius:var(--r-big);overflow:hidden;border:1px solid var(--line);box-shadow:var(--sh-1)}
.hero-media img{width:100%;aspect-ratio:4/3;object-fit:cover}
.hero-media::after{content:"";position:absolute;inset:0;background:rgba(18,60,54,.06);pointer-events:none}

/* ---------- sections ---------- */
.section{padding:var(--sec-pad) 0}
.section + .section{border-top:1px solid var(--line)}
.sec-head{margin-bottom:44px;max-width:760px}
.sec-head h2{
  font-size:clamp(26px,3.2vw,38px);line-height:1.25;font-weight:700;color:var(--ink);
  margin:0 0 14px;padding-left:16px;position:relative;
}
.sec-head h2::before{
  content:"";position:absolute;left:0;top:.28em;width:3px;height:24px;background:var(--lime);
}
.sec-head p{color:var(--muted);margin:0;font-size:16px}
.sec-head-row{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap}

/* ---------- index list ---------- */
.idx-list{border-top:1px solid var(--line)}
.idx-row{
  display:grid;grid-template-columns:96px 1fr 40px;align-items:center;gap:20px;
  min-height:88px;padding:14px 18px;border-bottom:1px solid var(--line);
  transition:background .25s ease;
}
.idx-row:hover{background:var(--sub)}
.idx-no{font-size:44px;font-weight:700;line-height:1;color:rgba(18,60,54,.14);font-variant-numeric:tabular-nums;transition:color .25s ease}
.idx-row:hover .idx-no{color:var(--lime)}
.idx-main h3{font-size:19px;font-weight:600;color:var(--ink);margin:0 0 4px}
.idx-main p{margin:0;font-size:14.5px;color:var(--muted);line-height:1.7}
.idx-arw{
  width:12px;height:12px;border-top:2px solid var(--ink);border-right:2px solid var(--ink);
  transform:rotate(45deg);justify-self:end;transition:transform .25s ease;
}
.idx-row:hover .idx-arw{transform:rotate(45deg) translate(4px,-4px)}

/* ---------- featured ---------- */
.feat-grid{display:grid;grid-template-columns:7fr 5fr;gap:32px;align-items:start}
.card-x{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;
  transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;height:100%;
  display:flex;flex-direction:column;
}
.card-x:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:var(--ink-soft)}
.card-x:hover .card-title{color:var(--ink)}
.card-media{overflow:hidden;background:var(--sub)}
.card-media img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .7s ease-out}
.card-x:hover .card-media img{transform:scale(1.04)}
.card-body-x{padding:22px 24px 24px}
.badge-x{
  display:inline-block;font-size:13px;letter-spacing:.08em;border:1px solid var(--ink);color:var(--ink);
  border-radius:var(--r-badge);padding:3px 9px;line-height:1.5;
}
.badge-muted{border-color:var(--line);color:var(--muted)}
.card-title{font-size:21px;font-weight:600;color:var(--ink);margin:14px 0 10px;line-height:1.45;transition:color .22s ease}
.card-text{color:var(--muted);font-size:15px;margin:0 0 16px;line-height:1.8}
.card-meta{display:flex;align-items:center;gap:12px;font-size:13px;color:var(--muted)}
.side-list{display:flex;flex-direction:column;gap:0}
.side-item{
  display:grid;grid-template-columns:120px 1fr;gap:16px;align-items:center;
  padding:16px 4px;border-bottom:1px solid var(--line);transition:background .25s ease;
}
.side-item:first-child{border-top:1px solid var(--line)}
.side-item:hover{background:var(--sub)}
.side-item img{width:120px;height:80px;object-fit:cover;border-radius:6px;border:1px solid var(--line);background:var(--sub)}
.side-item h3{font-size:16.5px;font-weight:600;color:var(--ink);margin:0 0 6px;line-height:1.5}
.side-item p{margin:0;font-size:13.5px;color:var(--muted);line-height:1.7}

/* ---------- news (CMS) ---------- */
.news-list{border-top:1px solid var(--line)}
.news-item{
  display:grid;grid-template-columns:96px 1fr 32px;gap:20px;align-items:center;
  padding:20px 18px;border-bottom:1px solid var(--line);transition:background .25s ease;
}
.news-item:hover{background:var(--sub)}
.news-thumb{width:96px;height:96px;object-fit:cover;border-radius:var(--r-card);border:1px solid var(--line);background:var(--sub)}
.news-head{display:flex;align-items:center;gap:12px;margin-bottom:8px;flex-wrap:wrap}
.news-title{font-size:18px;font-weight:600;color:var(--ink);margin:0 0 8px;line-height:1.5;transition:color .22s ease}
.news-item:hover .news-title{color:var(--ink-dark)}
.news-sum{
  margin:0;color:var(--muted);font-size:14.5px;line-height:1.75;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-arw{
  width:11px;height:11px;border-top:2px solid var(--ink);border-right:2px solid var(--ink);
  transform:rotate(45deg);justify-self:end;transition:transform .25s ease;
}
.news-item:hover .news-arw{transform:rotate(45deg) translate(4px,-4px)}
.empty-box{
  border:1px dashed var(--line);border-radius:var(--r-card);padding:40px 24px;text-align:center;background:#fff;
}
.empty-box p{margin:0 0 6px;font-weight:600;color:var(--ink)}
.empty-box small{display:block;color:var(--muted);margin-bottom:18px;font-size:14px}
.more-link{display:inline-flex;align-items:center;gap:8px;font-weight:600;font-size:15px;margin-top:26px}
.more-link::after{content:"→";transition:transform .22s ease}
.more-link:hover::after{transform:translateX(4px)}

/* ---------- steps ---------- */
.steps{display:grid;grid-template-columns:repeat(3,1fr)}
.step{padding:0 34px;border-left:1px solid var(--line)}
.step:first-child{border-left:0;padding-left:0}
.step-no{font-size:56px;font-weight:700;line-height:1;color:rgba(18,60,54,.14);font-variant-numeric:tabular-nums}
.step h3{font-size:21px;font-weight:600;color:var(--ink);margin:16px 0 10px}
.step p{color:var(--muted);font-size:15px;margin:0}

/* ---------- proof ---------- */
.proof{background:var(--sub);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.proof-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden}
.proof-cell{background:var(--paper);padding:30px 26px}
.proof-cell b{display:block;font-size:30px;font-weight:700;color:var(--ink);line-height:1.1;margin-bottom:10px;font-variant-numeric:tabular-nums}
.proof-cell strong{display:block;font-size:15.5px;font-weight:600;color:var(--ink);margin-bottom:8px}
.proof-cell p{margin:0;font-size:14px;color:var(--muted);line-height:1.75}

/* ---------- faq ---------- */
.faq-wrap{max-width:900px}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item:first-child{border-top:1px solid var(--line)}
.faq-q{
  width:100%;background:transparent;border:0;text-align:left;min-height:64px;
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  font-size:16px;font-weight:600;color:var(--ink);padding:14px 8px;cursor:pointer;
  transition:background .22s ease;position:relative;
}
.faq-q:hover{background:var(--sub)}
.faq-q .mark{position:relative;width:14px;height:14px;flex:0 0 14px}
.faq-q .mark::before,.faq-q .mark::after{
  content:"";position:absolute;background:var(--ink);transition:transform .2s ease,opacity .2s ease;
}
.faq-q .mark::before{left:0;top:6px;width:14px;height:2px}
.faq-q .mark::after{left:6px;top:0;width:2px;height:14px}
.faq-item.open .faq-q .mark::after{transform:scaleY(0);opacity:0}
.faq-item.open .faq-q::before{
  content:"";position:absolute;left:-14px;top:14px;bottom:14px;width:3px;background:var(--lime);
}
.faq-a{display:none;padding:0 8px 22px;color:var(--muted);font-size:15.5px;line-height:1.9}
.faq-item.open .faq-a{display:block}

/* ---------- cta ---------- */
.cta-band{
  background:var(--deep);border-radius:var(--r-big);padding:72px 56px;color:#fff;position:relative;overflow:hidden;
}
.cta-band::before{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.04;
  background-image:linear-gradient(#fff 1px,transparent 1px),linear-gradient(90deg,#fff 1px,transparent 1px);
  background-size:44px 44px;
}
.cta-inner{position:relative;display:flex;align-items:center;justify-content:space-between;gap:40px;flex-wrap:wrap}
.cta-inner h2{font-size:clamp(24px,3vw,34px);font-weight:700;margin:0 0 12px;color:#fff;line-height:1.3}
.cta-inner p{margin:0;color:rgba(255,255,255,.72);font-size:16px;max-width:560px}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap}
.cta-links{margin-top:26px;position:relative;font-size:14px}
.cta-links a{color:rgba(255,255,255,.72);margin-right:22px}
.cta-links a:hover{color:var(--lime)}

/* ---------- footer ---------- */
.site-footer{background:var(--sub);border-top:1px solid var(--line);padding:64px 0 0;margin-top:0}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;padding-bottom:44px}
.foot-brand{font-size:18px;font-weight:700;color:var(--ink);margin-bottom:14px;position:relative;display:inline-block}
.foot-brand::after{content:"";position:absolute;left:0;right:0;bottom:1px;height:5px;background:var(--lime);opacity:.5;z-index:-1}
.foot-grid p{font-size:14px;color:var(--muted);line-height:1.85;margin:0 0 10px}
.foot-title{font-size:14px;font-weight:600;color:var(--ink);margin:0 0 16px}
.foot-list{list-style:none;margin:0;padding:0}
.foot-list li{margin-bottom:10px}
.foot-list a{font-size:14px;color:var(--muted);display:inline-block;transition:transform .2s ease,color .2s ease}
.foot-list a:hover{color:var(--ink);transform:translateX(4px)}
.foot-bottom{
  border-top:1px solid var(--line);padding:22px 0;display:flex;justify-content:space-between;
  gap:18px;flex-wrap:wrap;font-size:13px;color:var(--muted);
}
.foot-bottom span{line-height:1.8}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .48s cubic-bezier(.22,.61,.36,1),transform .48s cubic-bezier(.22,.61,.36,1)}
.reveal.in{opacity:1;transform:none}

/* ---------- responsive ---------- */
@media (max-width:1199px){
  .hero-grid{gap:40px}
  .nav-left{gap:18px}
  .nav-link-x{font-size:14.5px}
}
@media (max-width:991px){
  :root{--sec-pad:64px}
  .nav-grid{grid-template-columns:auto 1fr auto;gap:14px}
  .nav-left,.nav-right .nav-link-x,.nav-right .icon-btn{display:none}
  .brand{justify-self:center}
  .hamburger{display:inline-flex}
  .hero-grid{grid-template-columns:1fr}
  .hero-media{order:2}
  .feat-grid{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}
  .step{border-left:0;padding:0;margin-bottom:30px;padding-bottom:26px;border-bottom:1px solid var(--line)}
  .step:last-child{border-bottom:0;margin-bottom:0;padding-bottom:0}
  .foot-grid{grid-template-columns:1fr 1fr}
  .proof-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:767px){
  .container{padding:0 18px}
  .hero{padding:48px 0 44px}
  .hero-metrics{gap:20px}
  .metric{border-right:0;padding-right:0;margin-right:0;flex:1 1 30%}
  .idx-row{grid-template-columns:56px 1fr 26px;gap:14px;padding:14px 8px}
  .idx-no{font-size:34px}
  .news-item{grid-template-columns:1fr 24px;gap:14px;padding:18px 8px}
  .news-thumb{display:none}
  .side-item{grid-template-columns:1fr}
  .side-item img{width:100%;height:150px}
  .cta-band{padding:48px 24px;border-radius:var(--r-card)}
  .faq-a{padding-left:0}
  .faq-item.open .faq-q::before{left:-8px}
}
@media (max-width:519px){
  .proof-grid{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr}
  .brand{font-size:16.5px}
  .hero-actions .btn-x{width:100%;justify-content:center}
  .cta-actions{width:100%}
  .cta-actions .btn-x{width:100%;justify-content:center}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .reveal{opacity:1!important;transform:none!important}
}

/* roulang page: category1 */
:root{
  --ink:#123C36;
  --ink-dark:#0C2A26;
  --ink-light:#2C5B54;
  --lime:#C2E63C;
  --bg:#F7F6F2;
  --bg-2:#EFEDE7;
  --card:#FFFFFF;
  --line:#E2DFD7;
  --text:#1B1F1D;
  --muted:#626B66;
  --dark:#0E1A18;
  --radius-btn:6px;
  --radius-card:8px;
  --radius-lg:12px;
  --radius-badge:2px;
  --shadow-sm:0 1px 2px rgba(14,26,24,.05);
  --shadow-lg:0 12px 32px -12px rgba(14,26,24,.18);
  --font:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",sans-serif;
  --bs-body-bg:#F7F6F2;
  --bs-body-color:#1B1F1D;
  --bs-primary:#123C36;
  --bs-link-color:#123C36;
  --bs-link-hover-color:#0C2A26;
  --bs-border-radius:6px;
  --bs-font-sans-serif:var(--font);
  --bs-body-font-family:var(--font);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.9;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
body.no-scroll{overflow:hidden;}
img{max-width:100%;display:block;}
a{color:var(--ink);text-decoration:none;transition:color .2s ease;}
a:hover{color:var(--ink-dark);}
button{font-family:inherit;}
h1,h2,h3,h4{color:var(--ink);margin:0;font-weight:700;letter-spacing:.01em;}
p{margin:0 0 20px;}
ul{margin:0;padding:0;list-style:none;}
.num,.metric,.date{font-variant-numeric:tabular-nums;letter-spacing:.02em;}

.container{width:100%;max-width:1280px;padding-left:24px;padding-right:24px;margin:0 auto;}
@media (max-width:575px){.container{padding-left:18px;padding-right:18px;}}

/* ---------- 按钮 ---------- */
.btn-x{
  display:inline-flex;align-items:center;gap:8px;
  height:46px;padding:0 24px;
  border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;line-height:1;
  border:1px solid transparent;cursor:pointer;
  position:relative;overflow:hidden;
  transition:background .22s ease,color .22s ease,border-color .22s ease,transform .12s ease;
}
.btn-x::after{
  content:"";position:absolute;left:0;bottom:0;height:2px;width:0;background:var(--lime);
  transition:width .24s ease;
}
.btn-x:hover::after{width:100%;}
.btn-x .arrow{display:inline-block;transition:transform .22s ease;}
.btn-x:hover .arrow{transform:translateX(3px);}
.btn-x:active{transform:scale(.985);}
.btn-primary-x{background:var(--ink);color:#fff;}
.btn-primary-x:hover{background:var(--ink-dark);color:#fff;}
.btn-ghost-x{background:transparent;color:var(--ink);border-color:var(--ink);}
.btn-ghost-x:hover{background:rgba(18,60,54,.08);color:var(--ink-dark);}
.btn-lime-x{background:var(--lime);color:var(--ink);}
.btn-lime-x:hover{background:#b5d934;color:var(--ink-dark);}
.btn-light-x{background:transparent;color:#fff;border-color:rgba(255,255,255,.5);}
.btn-light-x:hover{background:rgba(255,255,255,.1);color:#fff;}
.btn-sm-x{height:40px;padding:0 18px;font-size:14px;}
a:focus-visible,button:focus-visible,input:focus-visible{
  outline:2px solid var(--lime);outline-offset:2px;border-radius:4px;
}

/* ---------- 头部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(255,255,255,.86);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .25s ease;
}
.site-header.scrolled{box-shadow:0 6px 24px -14px rgba(14,26,24,.28);}
.header-inner{
  display:grid;grid-template-columns:1fr auto 1fr;
  align-items:center;gap:24px;height:76px;
}
.nav-left{display:flex;align-items:center;gap:26px;}
.nav-right{display:flex;align-items:center;gap:16px;justify-content:flex-end;}
.nav-link-x{
  position:relative;font-size:15px;font-weight:500;color:var(--text);
  padding:6px 0;white-space:nowrap;
}
.nav-link-x::after{
  content:"";position:absolute;left:0;bottom:0;height:2px;width:0;background:var(--lime);
  transition:width .22s ease;
}
.nav-link-x:hover{color:var(--ink);}
.nav-link-x:hover::after{width:100%;}
.nav-link-x.active{color:var(--ink);font-weight:700;}
.nav-link-x.active::before{
  content:"";position:absolute;left:-11px;top:50%;transform:translateY(-50%);
  width:3px;height:15px;background:var(--lime);
}
.brand{
  justify-self:center;display:flex;align-items:center;
  font-size:19px;font-weight:700;color:var(--ink);letter-spacing:.02em;
  height:40px;white-space:nowrap;
}
.brand span{
  border-bottom:3px solid var(--lime);padding-bottom:1px;
}
.icon-btn{
  width:40px;height:40px;display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--line);border-radius:var(--radius-btn);
  background:#fff;color:var(--ink);cursor:pointer;
  transition:border-color .2s ease,background .2s ease;
}
.icon-btn:hover{border-color:var(--ink-light);background:var(--bg-2);}
.burger{display:none;}
.search-inline{
  display:none;align-items:center;gap:8px;
}
.search-inline.open{display:flex;}
.search-inline input{
  height:40px;width:180px;border:1px solid var(--line);border-radius:var(--radius-btn);
  padding:0 12px;font-size:14px;background:#fff;color:var(--text);
}
.search-inline input:focus{outline:none;border-color:var(--ink);box-shadow:0 0 0 2px var(--lime);}

/* ---------- 抽屉（移动端） ---------- */
.drawer{
  position:fixed;inset:76px 0 0 0;background:#fff;z-index:55;
  transform:translateY(-12px);opacity:0;visibility:hidden;
  transition:opacity .25s ease,transform .25s ease,visibility .25s;
  overflow-y:auto;padding:12px 18px 32px;
  border-top:1px solid var(--line);
}
.drawer.open{opacity:1;visibility:visible;transform:translateY(0);}
.drawer a{
  display:flex;align-items:center;justify-content:space-between;
  height:48px;font-size:16px;color:var(--text);border-bottom:1px solid var(--line);
  padding:0 4px;
}
.drawer a:hover{color:var(--ink);background:var(--bg-2);}
.drawer .drawer-cta{margin-top:20px;display:block;}
.drawer .drawer-cta .btn-x{width:100%;justify-content:center;}

@media (max-width:991px){
  .nav-left,.nav-right .nav-link-x,.search-inline{display:none;}
  .nav-right{gap:10px;}
  .burger{display:inline-flex;}
  .header-inner{grid-template-columns:auto 1fr auto;height:68px;}
  .brand{justify-self:center;font-size:16px;}
  .brand span{border-bottom-width:2px;}
  .drawer{inset:68px 0 0 0;}
}
@media (max-width:520px){
  .brand{font-size:15px;}
  .brand .brand-short{display:none;}
}

/* ---------- 面包屑 ---------- */
.crumb{padding:22px 0 0;font-size:12px;color:var(--muted);letter-spacing:.02em;}
.crumb a{color:var(--muted);}
.crumb a:hover{color:var(--ink);}
.crumb .sep{margin:0 8px;color:#B9B4A9;}
.crumb .now{color:var(--ink);font-weight:600;}

/* ---------- 页头 ---------- */
.page-head{
  padding:36px 0 52px;
  border-bottom:1px solid var(--line);
  background:linear-gradient(180deg,#FFFFFF 0%,var(--bg) 100%);
}
.page-head .kicker{
  display:inline-block;font-size:13px;font-weight:600;letter-spacing:.14em;
  color:var(--ink);border:1px solid var(--ink);
  border-radius:var(--radius-badge);padding:3px 10px;margin-bottom:20px;
}
.page-head h1{
  font-size:clamp(30px,5vw,52px);line-height:1.14;font-weight:700;
  max-width:920px;margin-bottom:18px;
}
.page-head h1 em{font-style:normal;border-bottom:4px solid var(--lime);}
.page-head .lead{
  max-width:780px;font-size:17px;line-height:1.9;color:var(--muted);margin-bottom:0;
}
.head-metrics{
  display:flex;flex-wrap:wrap;gap:36px;margin-top:32px;
  padding-top:24px;border-top:1px solid var(--line);
}
.head-metrics div span{
  display:block;font-size:26px;font-weight:700;color:var(--ink);
}
.head-metrics div small{font-size:13px;color:var(--muted);}

/* ---------- 双栏：sticky 目录 + 正文 ---------- */
.main-section{padding:72px 0 8px;}
.split{
  display:grid;grid-template-columns:250px minmax(0,1fr);gap:56px;align-items:start;
}
.toc{
  position:sticky;top:104px;
  border-left:1px solid var(--line);padding-left:20px;
}
.toc-title{
  font-size:13px;font-weight:600;letter-spacing:.14em;color:var(--muted);
  margin-bottom:16px;
}
.toc-list li{margin-bottom:2px;}
.toc-list a{
  display:block;padding:9px 0 9px 12px;font-size:14px;color:var(--muted);
  border-left:2px solid transparent;margin-left:-21px;padding-left:19px;
  transition:color .2s ease,border-color .2s ease,background .2s ease;
}
.toc-list a:hover{color:var(--ink);background:var(--bg-2);}
.toc-list a.current{color:var(--ink);font-weight:600;border-left-color:var(--lime);}
.toc-note{
  margin-top:24px;padding:16px;background:var(--bg-2);border-radius:var(--radius-card);
  font-size:13px;line-height:1.8;color:var(--muted);
}

.block{margin-bottom:56px;scroll-margin-top:110px;}
.block h2{
  position:relative;font-size:clamp(22px,3vw,30px);line-height:1.3;
  padding-left:16px;margin-bottom:18px;
}
.block h2::before{
  content:"";position:absolute;left:0;top:6px;width:3px;height:24px;background:var(--lime);
}
.block h3{font-size:20px;line-height:1.4;margin:26px 0 12px;}
.block p{font-size:16.5px;color:#262B28;}
.block p:last-child{margin-bottom:0;}
.block .hint{
  border-left:3px solid var(--ink);background:var(--bg-2);
  padding:18px 20px;border-radius:0 var(--radius-card) var(--radius-card) 0;
  font-size:15px;color:var(--ink);margin:22px 0 0;
}
.checklist li{
  position:relative;padding-left:22px;margin-bottom:10px;font-size:16px;color:#262B28;
}
.checklist li::before{
  content:"";position:absolute;left:0;top:11px;width:8px;height:8px;
  background:var(--lime);border-radius:1px;
}
.figure{margin:26px 0 0;}
.figure .frame{
  aspect-ratio:16/9;border-radius:var(--radius-lg);overflow:hidden;
  border:1px solid var(--line);background:var(--bg-2);
}
.figure img{width:100%;height:100%;object-fit:cover;}
.figure figcaption{font-size:13px;color:var(--muted);margin-top:10px;}

/* 数据行 */
.data-row{
  display:grid;grid-template-columns:repeat(3,1fr);gap:1px;
  background:var(--line);border:1px solid var(--line);
  border-radius:var(--radius-card);overflow:hidden;margin-top:24px;
}
.data-row div{background:#fff;padding:20px 18px;}
.data-row strong{display:block;font-size:24px;color:var(--ink);font-weight:700;}
.data-row span{font-size:13px;color:var(--muted);}

/* ---------- 相关分类 ---------- */
.rel-section{padding:24px 0 0;}
.rel-head{
  display:flex;align-items:baseline;justify-content:space-between;
  gap:16px;flex-wrap:wrap;margin-bottom:8px;
}
.rel-head h2{font-size:26px;}
.rel-head p{font-size:14px;color:var(--muted);margin:0;}
.rel-list{border-top:1px solid var(--line);}
.rel-item{
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  min-height:78px;padding:18px 8px;border-bottom:1px solid var(--line);
  transition:background .22s ease,padding .22s ease;
}
.rel-item:hover{background:var(--bg-2);padding-left:16px;padding-right:16px;}
.rel-item .rel-name{font-size:18px;font-weight:600;color:var(--ink);}
.rel-item .rel-desc{display:block;font-size:14px;color:var(--muted);font-weight:400;margin-top:4px;}
.rel-item .arrow-ico{
  width:10px;height:10px;border-top:2px solid var(--ink);border-right:2px solid var(--ink);
  transform:rotate(45deg);flex:none;transition:transform .22s ease;
}
.rel-item:hover .arrow-ico{transform:translateX(4px) rotate(45deg);}

/* ---------- FAQ ---------- */
.faq-section{padding:72px 0 0;}
.faq-section h2{font-size:clamp(24px,3vw,32px);margin-bottom:10px;padding-left:16px;position:relative;}
.faq-section h2::before{
  content:"";position:absolute;left:0;top:5px;width:3px;height:24px;background:var(--lime);
}
.faq-section .sub{color:var(--muted);font-size:15px;margin-bottom:26px;padding-left:16px;}
.accordion-x{border-top:1px solid var(--line);}
.acc-item{border-bottom:1px solid var(--line);}
.acc-btn{
  width:100%;min-height:64px;display:flex;align-items:center;justify-content:space-between;
  gap:18px;background:none;border:0;text-align:left;cursor:pointer;
  font-size:16px;font-weight:600;color:var(--ink);padding:18px 4px 18px 0;
  position:relative;transition:color .2s ease;
}
.acc-btn::before{
  content:"";position:absolute;left:-14px;top:50%;transform:translateY(-50%) scaleY(0);
  width:3px;height:26px;background:var(--lime);transition:transform .2s ease;
}
.acc-item.open .acc-btn::before{transform:translateY(-50%) scaleY(1);}
.acc-sign{position:relative;width:16px;height:16px;flex:none;}
.acc-sign::before,.acc-sign::after{
  content:"";position:absolute;background:var(--ink);transition:transform .2s ease,opacity .2s ease;
}
.acc-sign::before{left:0;top:7px;width:16px;height:2px;}
.acc-sign::after{left:7px;top:0;width:2px;height:16px;}
.acc-item.open .acc-sign::after{transform:scaleY(0);opacity:0;}
.acc-panel{
  max-height:0;overflow:hidden;transition:max-height .28s ease;
}
.acc-panel p{
  font-size:15.5px;color:var(--muted);padding:0 40px 22px 0;margin:0;
}

/* ---------- 深色 CTA ---------- */
.cta-wrap{padding:80px 0 0;}
.cta-dark{
  position:relative;background:var(--dark);border-radius:var(--radius-lg);
  padding:72px 56px;overflow:hidden;color:#fff;
}
.cta-dark::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);
  background-size:44px 44px;pointer-events:none;
}
.cta-inner{position:relative;display:flex;align-items:center;justify-content:space-between;gap:40px;flex-wrap:wrap;}
.cta-dark h2{color:#fff;font-size:clamp(24px,3vw,34px);line-height:1.3;margin-bottom:12px;}
.cta-dark p{color:rgba(255,255,255,.72);max-width:620px;margin:0;font-size:16px;}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;}
.cta-links{margin-top:26px;font-size:14px;color:rgba(255,255,255,.6);}
.cta-links a{color:rgba(255,255,255,.86);border-bottom:1px solid rgba(255,255,255,.3);margin-right:18px;}
.cta-links a:hover{color:var(--lime);border-color:var(--lime);}

/* ---------- 页脚 ---------- */
.site-footer{margin-top:90px;background:var(--bg-2);border-top:1px solid var(--line);}
.foot-grid{
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;
  padding:60px 0 40px;
}
.foot-brand{font-size:18px;font-weight:700;color:var(--ink);margin-bottom:14px;}
.foot-grid p{font-size:14px;color:var(--muted);line-height:1.85;margin:0 0 10px;}
.foot-title{font-size:14px;font-weight:600;color:var(--ink);margin-bottom:14px;}
.foot-list li{margin-bottom:10px;}
.foot-list a{
  font-size:14px;color:var(--muted);display:inline-block;
  transition:transform .2s ease,color .2s ease;
}
.foot-list a:hover{color:var(--ink);transform:translateX(3px);}
.foot-bottom{
  display:flex;justify-content:space-between;gap:18px;flex-wrap:wrap;
  border-top:1px solid var(--line);padding:20px 0 32px;
  font-size:13px;color:var(--muted);
}

/* ---------- 动效 ---------- */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .48s cubic-bezier(.22,.61,.36,1),transform .48s cubic-bezier(.22,.61,.36,1);}
.reveal.in{opacity:1;transform:none;}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;}
  .reveal{opacity:1;transform:none;}
}

/* ---------- 响应式 ---------- */
@media (max-width:1199px){
  .split{grid-template-columns:220px minmax(0,1fr);gap:40px;}
}
@media (max-width:991px){
  .main-section{padding:52px 0 0;}
  .split{grid-template-columns:1fr;gap:32px;}
  .toc{
    position:static;border-left:0;border-top:1px solid var(--line);
    border-bottom:1px solid var(--line);padding:18px 0;
  }
  .toc-list{display:flex;gap:8px;overflow-x:auto;padding-bottom:4px;}
  .toc-list li{margin:0;flex:none;}
  .toc-list a{
    margin-left:0;padding:8px 14px;border:1px solid var(--line);border-radius:var(--radius-btn);
    white-space:nowrap;background:#fff;
  }
  .toc-list a.current{border-color:var(--ink);background:var(--bg-2);}
  .toc-note{display:none;}
  .foot-grid{grid-template-columns:1fr 1fr;gap:32px;padding:48px 0 32px;}
  .cta-dark{padding:52px 28px;}
  .cta-inner{flex-direction:column;align-items:flex-start;}
}
@media (max-width:767px){
  .page-head{padding:24px 0 40px;}
  .block{margin-bottom:44px;}
  .data-row{grid-template-columns:1fr;}
  .faq-section,.cta-wrap{padding-top:56px;}
}
@media (max-width:575px){
  .head-metrics{gap:24px;}
  .foot-grid{grid-template-columns:1fr;}
  .foot-bottom{flex-direction:column;gap:8px;}
  .rel-item .rel-name{font-size:16px;}
}

/* roulang page: category2 */
:root{
  --ink:#123C36;
  --ink-dark:#0C2A26;
  --ink-soft:#2C5B54;
  --lime:#C2E63C;
  --paper:#F7F6F2;
  --card:#FFFFFF;
  --paper-2:#EFEDE7;
  --line:#E2DFD7;
  --text:#1B1F1D;
  --muted:#626B66;
  --deep:#0E1A18;
  --r-btn:6px;
  --r-card:8px;
  --r-pic:12px;
  --r-badge:2px;
  --sh-1:0 1px 2px rgba(14,26,24,.05);
  --sh-2:0 12px 32px -12px rgba(14,26,24,.18);
  --bs-body-bg:var(--paper);
  --bs-body-color:var(--text);
  --bs-primary:var(--ink);
  --bs-link-color:var(--ink);
  --bs-link-hover-color:var(--ink-dark);
  --bs-border-radius:6px;
  --bs-font-sans-serif:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",sans-serif;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--paper);
  color:var(--text);
  font-family:"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{max-width:100%;display:block;}
a{color:var(--ink);text-decoration:none;transition:color .2s ease;}
a:hover{color:var(--ink-dark);}
a:focus-visible,button:focus-visible,input:focus-visible{outline:2px solid var(--lime);outline-offset:2px;}
h1,h2,h3,h4{color:var(--ink);margin:0;font-weight:700;letter-spacing:.01em;}
p{margin:0 0 18px;font-size:16.5px;line-height:1.9;color:#2A312E;}
ul{margin:0;padding:0;list-style:none;}
.container{width:100%;max-width:1280px;margin:0 auto;padding:0 24px;}
.num{font-variant-numeric:tabular-nums;letter-spacing:.02em;}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(255,255,255,.86);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .25s ease;
}
.site-header.is-scrolled{box-shadow:0 6px 24px -16px rgba(14,26,24,.35);}
.nav-grid{
  display:grid;grid-template-columns:1fr auto 1fr;align-items:center;
  height:76px;gap:16px;
}
.nav-left{display:flex;align-items:center;gap:6px;}
.nav-right{display:flex;align-items:center;justify-content:flex-end;gap:6px;}
.brand{
  font-size:19px;font-weight:700;color:var(--ink);white-space:nowrap;
  height:40px;line-height:40px;position:relative;
}
.brand::after{
  content:"";position:absolute;left:0;right:26%;bottom:4px;height:6px;
  background:var(--lime);opacity:.75;z-index:-1;border-radius:1px;
}
.brand:hover{color:var(--ink-dark);}
.nav-link-x{
  position:relative;display:inline-flex;align-items:center;
  height:44px;padding:0 12px;font-size:15px;font-weight:500;color:#2A312E;
  white-space:nowrap;
}
.nav-link-x::after{
  content:"";position:absolute;left:12px;right:12px;bottom:9px;height:2px;
  background:var(--lime);transform:scaleX(0);transform-origin:left;
  transition:transform .22s ease;
}
.nav-link-x:hover{color:var(--ink);}
.nav-link-x:hover::after{transform:scaleX(1);}
.nav-link-x.is-active{color:var(--ink);font-weight:700;}
.nav-link-x.is-active::before{
  content:"";position:absolute;left:0;top:12px;bottom:12px;width:3px;
  background:var(--lime);border-radius:1px;
}
.nav-link-x.is-active::after{transform:scaleX(1);}
.nav-plain{font-size:15px;font-weight:500;color:#2A312E;padding:0 10px;height:44px;display:inline-flex;align-items:center;}
.nav-plain:hover{color:var(--ink);}
.icon-btn{
  width:44px;height:44px;display:inline-flex;align-items:center;justify-content:center;
  border:1px solid transparent;background:transparent;border-radius:var(--r-btn);cursor:pointer;
  color:var(--ink);
}
.icon-btn:hover{border-color:var(--line);background:var(--paper-2);}
.icon-btn svg{width:18px;height:18px;}
.btn-cta{
  display:inline-flex;align-items:center;gap:8px;
  height:44px;padding:0 20px;border-radius:var(--r-btn);
  background:var(--ink);color:#fff;font-size:15px;font-weight:600;
  border:1px solid var(--ink);position:relative;overflow:hidden;
  transition:background .2s ease,transform .15s ease;
}
.btn-cta::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--lime);
  transform:scaleX(0);transform-origin:left;transition:transform .22s ease;
}
.btn-cta:hover{background:var(--ink-dark);color:#fff;transform:translateY(-1px);}
.btn-cta:hover::after{transform:scaleX(1);}
.btn-cta:active{transform:scale(.985);}
.search-panel{
  position:absolute;top:100%;right:24px;width:320px;background:#fff;
  border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--sh-2);
  padding:16px;display:none;
}
.search-panel.is-open{display:block;}
.search-panel form{display:flex;gap:8px;}
.search-panel input{
  flex:1;height:44px;border:1px solid var(--line);border-radius:var(--r-btn);
  background:#fff;padding:0 14px;font-size:15px;color:var(--text);
}
.search-panel input:focus{outline:none;border-color:var(--ink);box-shadow:0 0 0 2px var(--lime);}
.search-panel button{
  height:44px;padding:0 18px;border:none;border-radius:var(--r-btn);
  background:var(--ink);color:#fff;font-size:15px;font-weight:600;cursor:pointer;
}
.burger{
  display:none;width:44px;height:44px;align-items:center;justify-content:center;
  border:1px solid var(--line);border-radius:var(--r-btn);background:#fff;cursor:pointer;
}
.burger span{display:block;width:18px;height:2px;background:var(--ink);position:relative;}
.burger span::before,.burger span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--ink);}
.burger span::before{top:-6px;}
.burger span::after{top:6px;}

/* offcanvas */
.x-drawer{
  background:var(--paper);border-left:1px solid var(--line);
}
.x-drawer .offcanvas-header{border-bottom:1px solid var(--line);padding:18px 22px;}
.x-drawer .offcanvas-body{padding:0 0 90px;}
.drawer-brand{font-size:17px;font-weight:700;color:var(--ink);}
.drawer-link{
  display:flex;align-items:center;justify-content:space-between;
  min-height:48px;padding:0 22px;font-size:15.5px;color:#2A312E;
  border-bottom:1px solid var(--line);
}
.drawer-link:hover{background:var(--paper-2);color:var(--ink);}
.drawer-link.is-active{color:var(--ink);font-weight:700;box-shadow:inset 3px 0 0 var(--lime);}
.drawer-foot{
  position:fixed;left:0;right:0;bottom:0;padding:14px 22px;background:#fff;
  border-top:1px solid var(--line);
}
.drawer-foot .btn-cta{width:100%;justify-content:center;}
.search-mobile{padding:16px 22px;border-bottom:1px solid var(--line);}
.search-mobile input{
  width:100%;height:44px;border:1px solid var(--line);border-radius:var(--r-btn);padding:0 14px;
}

/* ---------- page head ---------- */
.page-head{
  background:linear-gradient(180deg,#FFFFFF 0%,var(--paper-2) 100%);
  border-bottom:1px solid var(--line);
  padding:56px 0 48px;
}
.crumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:12.5px;color:var(--muted);margin-bottom:22px;letter-spacing:.02em;
}
.crumb a{color:var(--muted);}
.crumb a:hover{color:var(--ink);}
.crumb .sep{color:#B9B5A9;}
.crumb .cur{color:var(--ink);font-weight:600;}
.page-head h1{
  font-size:clamp(30px,4.4vw,50px);line-height:1.14;font-weight:700;
  max-width:16em;margin-bottom:18px;
}
.page-head .lead{
  font-size:17px;color:var(--muted);max-width:44em;margin-bottom:26px;line-height:1.85;
}
.head-metrics{display:flex;flex-wrap:wrap;gap:14px 44px;padding-top:22px;border-top:1px solid var(--line);}
.head-metrics div{display:flex;flex-direction:column;gap:2px;}
.head-metrics .k{font-size:13px;color:var(--muted);}
.head-metrics .v{font-size:24px;font-weight:700;color:var(--ink);line-height:1.3;}

/* ---------- tab anchors ---------- */
.tabbar{
  position:sticky;top:76px;z-index:1020;
  background:rgba(247,246,242,.94);
  backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
}
.tabbar-inner{
  display:flex;gap:4px;overflow-x:auto;scrollbar-width:none;
  padding:10px 0;
}
.tabbar-inner::-webkit-scrollbar{display:none;}
.tab-item{
  flex:0 0 auto;display:inline-flex;align-items:center;height:44px;padding:0 16px;
  font-size:15px;color:var(--muted);border-radius:var(--r-btn);
  border:1px solid transparent;white-space:nowrap;transition:all .2s ease;
}
.tab-item:hover{color:var(--ink);background:#fff;border-color:var(--line);}
.tab-item.is-active{color:#fff;background:var(--ink);border-color:var(--ink);font-weight:600;}

/* ---------- content ---------- */
main{padding-bottom:0;}
.wrap{max-width:900px;margin:0 auto;}
.block{padding:64px 0 8px;}
.block:first-of-type{padding-top:56px;}
.block h2{
  font-size:clamp(24px,2.6vw,32px);line-height:1.28;margin-bottom:20px;
  position:relative;padding-left:16px;
}
.block h2::before{
  content:"";position:absolute;left:0;top:6px;bottom:6px;width:3px;
  background:var(--lime);border-radius:1px;
}
.block h3{font-size:21px;line-height:1.4;margin:26px 0 12px;}
.block p{color:#2A312E;}
.figure{margin:34px 0 8px;}
.figure .ph{
  aspect-ratio:16/9;border-radius:var(--r-pic);overflow:hidden;
  border:1px solid var(--line);background:var(--paper-2);position:relative;
}
.figure img{width:100%;height:100%;object-fit:cover;}
.figure figcaption{font-size:13px;color:var(--muted);margin-top:10px;letter-spacing:.02em;}

.check-list{margin:8px 0 22px;}
.check-list li{
  position:relative;padding:14px 0 14px 26px;border-bottom:1px solid var(--line);
  font-size:16px;color:#2A312E;
}
.check-list li:last-child{border-bottom:none;}
.check-list li::before{
  content:"";position:absolute;left:2px;top:24px;width:8px;height:8px;
  background:var(--lime);border-radius:1px;
}

.note{
  background:var(--paper-2);border-left:3px solid var(--ink);
  padding:20px 22px;border-radius:0 var(--r-card) var(--r-card) 0;
  font-size:15.5px;color:#2A312E;margin:24px 0;
}
.note strong{color:var(--ink);}

.pair{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin:26px 0;}
.pair .cell{
  border:1px solid var(--line);border-radius:var(--r-card);background:#fff;
  padding:22px 22px 18px;box-shadow:var(--sh-1);
}
.pair .cell h4{font-size:17px;margin-bottom:8px;}
.pair .cell p{font-size:15.5px;color:var(--muted);margin:0;}

.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:0;border-top:1px solid var(--line);margin:26px 0;}
.steps .st{padding:24px 22px 20px;border-right:1px solid var(--line);}
.steps .st:last-child{border-right:none;}
.steps .st .n{font-size:44px;font-weight:700;line-height:1;color:rgba(18,60,54,.16);margin-bottom:12px;}
.steps .st h4{font-size:17px;margin-bottom:8px;}
.steps .st p{font-size:15px;color:var(--muted);margin:0;}

/* related */
.related{padding:72px 0 0;}
.related h2{font-size:clamp(22px,2.4vw,30px);margin-bottom:8px;}
.related .sub{color:var(--muted);font-size:15.5px;margin-bottom:24px;}
.rel-card{
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:22px 4px;border-bottom:1px solid var(--line);
  transition:background .2s ease,padding .2s ease;
}
.rel-card:first-of-type{border-top:1px solid var(--line);}
.rel-card:hover{background:var(--paper-2);padding-left:14px;padding-right:14px;}
.rel-card .t{font-size:17px;font-weight:600;color:var(--ink);margin-bottom:4px;}
.rel-card .d{font-size:14.5px;color:var(--muted);margin:0;}
.arrow{
  flex:0 0 auto;width:26px;height:26px;position:relative;
  transition:transform .22s ease;
}
.arrow::before{
  content:"";position:absolute;left:6px;top:12px;width:14px;height:1.5px;background:var(--ink);
}
.arrow::after{
  content:"";position:absolute;right:7px;top:8px;width:8px;height:8px;
  border-top:1.5px solid var(--ink);border-right:1.5px solid var(--ink);
  transform:rotate(45deg);
}
.rel-card:hover .arrow{transform:translateX(6px);}

/* FAQ */
.faq{padding:72px 0 0;}
.faq h2{font-size:clamp(22px,2.4vw,30px);margin-bottom:20px;position:relative;padding-left:16px;}
.faq h2::before{content:"";position:absolute;left:0;top:6px;bottom:6px;width:3px;background:var(--lime);}
.accordion-item{
  border:none;border-bottom:1px solid var(--line);background:transparent;
}
.accordion-button{
  background:transparent;box-shadow:none;color:var(--ink);
  font-size:16px;font-weight:600;padding:22px 44px 22px 0;min-height:64px;
  border-radius:0;position:relative;
}
.accordion-button::after{
  content:"";position:absolute;right:8px;top:50%;width:14px;height:2px;
  background:var(--ink);transform:translateY(-50%);transition:transform .2s ease;
  background-image:none;
}
.accordion-button::before{
  content:"";position:absolute;right:14px;top:50%;width:2px;height:14px;
  background:var(--ink);transform:translateY(-50%);transition:opacity .2s ease;
}
.accordion-button:not(.collapsed){background:transparent;color:var(--ink);box-shadow:none;}
.accordion-button:not(.collapsed)::before{opacity:0;}
.accordion-button:not(.collapsed)::after{background:var(--lime);}
.accordion-button:focus{box-shadow:none;border-color:transparent;}
.accordion-item:has(.accordion-button:not(.collapsed)){
  box-shadow:inset 3px 0 0 var(--lime);
}
.accordion-body{
  padding:0 40px 26px 0;font-size:16px;color:#2A312E;line-height:1.9;
}

/* CTA */
.cta-wrap{padding:80px 0 88px;}
.cta-box{
  background:var(--deep);border-radius:var(--r-pic);padding:64px 56px;color:#fff;
  position:relative;overflow:hidden;
  display:flex;align-items:center;justify-content:space-between;gap:40px;
}
.cta-box::before{
  content:"";position:absolute;inset:0;opacity:.05;
  background-image:linear-gradient(#fff 1px,transparent 1px),linear-gradient(90deg,#fff 1px,transparent 1px);
  background-size:56px 56px;
}
.cta-box > *{position:relative;}
.cta-box h2{color:#fff;font-size:clamp(24px,2.8vw,34px);margin-bottom:12px;}
.cta-box p{color:rgba(255,255,255,.72);font-size:16px;margin:0;max-width:38em;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;flex:0 0 auto;}
.btn-lime{
  display:inline-flex;align-items:center;gap:8px;height:48px;padding:0 24px;
  border-radius:var(--r-btn);background:var(--lime);color:var(--ink);
  font-size:15.5px;font-weight:700;border:1px solid var(--lime);
  transition:transform .15s ease,background .2s ease;
}
.btn-lime:hover{background:#D2F04F;color:var(--ink);transform:translateY(-1px);}
.btn-lime:active{transform:scale(.985);}
.btn-ghost{
  display:inline-flex;align-items:center;gap:8px;height:48px;padding:0 24px;
  border-radius:var(--r-btn);background:transparent;color:#fff;
  font-size:15.5px;font-weight:600;border:1px solid rgba(255,255,255,.42);
  transition:background .2s ease,border-color .2s ease;
}
.btn-ghost:hover{background:rgba(255,255,255,.08);color:#fff;border-color:rgba(255,255,255,.7);}
.cta-links{margin-top:18px;font-size:14px;color:rgba(255,255,255,.6);}
.cta-links a{color:rgba(255,255,255,.78);border-bottom:1px solid rgba(255,255,255,.3);}
.cta-links a:hover{color:var(--lime);}

/* footer */
.site-footer{background:var(--paper-2);border-top:1px solid var(--line);padding:64px 0 28px;}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;}
.foot-brand{font-size:18px;font-weight:700;color:var(--ink);margin-bottom:14px;}
.site-footer p{font-size:14.5px;color:var(--muted);line-height:1.85;margin-bottom:10px;}
.foot-title{font-size:14px;font-weight:600;color:var(--ink);margin-bottom:14px;}
.foot-list li{margin-bottom:10px;}
.foot-list a{font-size:14px;color:var(--muted);display:inline-block;transition:transform .18s ease,color .18s ease;}
.foot-list a:hover{color:var(--ink);transform:translateX(3px);}
.foot-bottom{
  margin-top:44px;padding-top:22px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;
  font-size:13.5px;color:var(--muted);
}

/* reveal */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .48s cubic-bezier(.22,.61,.36,1),transform .48s cubic-bezier(.22,.61,.36,1);}
.reveal.is-in{opacity:1;transform:none;}

@media (max-width:1199px){
  .nav-link-x{padding:0 9px;font-size:14.5px;}
}
@media (max-width:991px){
  .nav-left,.nav-right{display:none;}
  .nav-grid{grid-template-columns:1fr auto;}
  .burger{display:inline-flex;}
  .brand{font-size:17px;justify-self:start;}
  .nav-grid{height:66px;}
  .tabbar{top:66px;}
  .foot-grid{grid-template-columns:1fr 1fr;gap:30px;}
  .cta-box{flex-direction:column;align-items:flex-start;padding:48px 32px;}
  .steps{grid-template-columns:1fr;}
  .steps .st{border-right:none;border-bottom:1px solid var(--line);}
  .steps .st:last-child{border-bottom:none;}
}
@media (max-width:767px){
  .container{padding:0 18px;}
  .page-head{padding:40px 0 34px;}
  .page-head .lead{font-size:16px;}
  .block{padding:48px 0 4px;}
  .block p{font-size:16px;}
  .pair{grid-template-columns:1fr;}
  .cta-wrap{padding:56px 0 64px;}
  .cta-box{padding:40px 24px;}
  .faq,.related{padding-top:52px;}
  .foot-bottom{flex-direction:column;}
}
@media (max-width:520px){
  .head-metrics{gap:12px 26px;}
  .head-metrics .v{font-size:20px;}
  .brand::after{right:18%;}
  .rel-card .t{font-size:16px;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;}
  .reveal{opacity:1;transform:none;}
  html{scroll-behavior:auto;}
}

/* roulang page: article */
:root{
  --ink:#123C36;
  --ink-dark:#0C2A26;
  --ink-light:#2C5B54;
  --lime:#C2E63C;
  --paper:#F7F6F2;
  --white:#FFFFFF;
  --sub:#EFEDE7;
  --line:#E2DFD7;
  --text:#1B1F1D;
  --muted:#626B66;
  --dark:#0E1A18;
  --radius-btn:6px;
  --radius-card:8px;
  --radius-cover:12px;
  --shadow-1:0 1px 2px rgba(14,26,24,.05);
  --shadow-2:0 12px 32px -12px rgba(14,26,24,.18);
  --gap:24px;
  --bs-body-bg:var(--paper);
  --bs-body-color:var(--text);
  --bs-primary:var(--ink);
  --bs-link-color:var(--ink);
  --bs-link-hover-color:var(--ink-dark);
  --bs-border-radius:var(--radius-card);
  --bs-font-sans-serif:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",sans-serif;
  font-size:16px;
  line-height:1.9;
  color:var(--text);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--ink);text-decoration:none;transition:color .2s ease}
a:hover{color:var(--ink-dark)}
button,input{font-family:inherit;font-size:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
.container{width:100%;max-width:1280px;margin:0 auto;padding:0 24px}
.num{font-variant-numeric:tabular-nums;letter-spacing:.02em}
:focus-visible{outline:2px solid var(--lime);outline-offset:2px;border-radius:2px}

/* ---------- 顶部阅读进度 ---------- */
.read-progress{position:fixed;top:0;left:0;height:2px;width:0;background:var(--lime);z-index:1100;transition:width .12s linear}

/* ---------- 头部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:1050;
  background:rgba(255,255,255,.86);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .25s ease;
}
.site-header.is-scrolled{box-shadow:0 6px 22px -14px rgba(14,26,24,.28)}
.header-inner{
  max-width:1280px;margin:0 auto;padding:0 24px;height:76px;
  display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:20px;
}
.nav-left{display:flex;align-items:center;gap:20px;min-width:0}
.nav-right{display:flex;align-items:center;justify-content:flex-end;gap:16px}
.nav-link-x{
  position:relative;font-size:15px;font-weight:500;color:var(--text);
  padding:6px 0;white-space:nowrap;line-height:1.3;
}
.nav-link-x::after{
  content:"";position:absolute;left:0;bottom:0;height:2px;width:0;background:var(--lime);
  transition:width .22s ease;
}
.nav-link-x:hover::after,.nav-link-x.is-active::after{width:100%}
.nav-link-x.is-active{color:var(--ink);font-weight:700;padding-left:10px}
.nav-link-x.is-active::before{
  content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:3px;height:16px;background:var(--lime);border-radius:1px;
}
.brand{
  font-size:19px;font-weight:700;letter-spacing:.01em;color:var(--ink);
  white-space:nowrap;line-height:1.2;display:inline-flex;align-items:center;height:40px;
}
.brand span{border-bottom:2px solid var(--lime);padding-bottom:1px}
.brand:hover{color:var(--ink)}
.icon-btn{
  width:44px;height:44px;display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--line);border-radius:var(--radius-btn);background:var(--white);
  color:var(--ink);cursor:pointer;transition:border-color .2s ease,background .2s ease;
}
.icon-btn:hover{border-color:var(--ink-light);background:var(--sub)}
.icon-btn svg{width:18px;height:18px}
.menu-toggle{
  display:none;width:44px;height:44px;border:1px solid var(--line);border-radius:var(--radius-btn);
  background:var(--white);cursor:pointer;flex-direction:column;align-items:center;justify-content:center;gap:4px;
}
.menu-toggle span{display:block;width:18px;height:2px;background:var(--ink);border-radius:1px}

/* ---------- 按钮 ---------- */
.btn-x{
  position:relative;display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 24px;border-radius:var(--radius-btn);border:1px solid transparent;
  font-size:15px;font-weight:600;line-height:1;cursor:pointer;overflow:hidden;
  transition:background .22s ease,color .22s ease,border-color .22s ease,transform .12s ease,box-shadow .22s ease;
}
.btn-x::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--lime);
  transform:scaleX(0);transform-origin:left;transition:transform .24s ease;
}
.btn-x:hover::after{transform:scaleX(1)}
.btn-x:active{transform:scale(.985)}
.btn-primary-x{background:var(--ink);color:#fff}
.btn-primary-x:hover{background:var(--ink-dark);color:#fff}
.btn-outline-x{background:transparent;border-color:var(--ink);color:var(--ink)}
.btn-outline-x:hover{background:rgba(18,60,54,.08);color:var(--ink)}
.btn-accent-x{background:var(--lime);color:var(--ink-dark)}
.btn-accent-x:hover{background:#d2f24d;color:var(--ink-dark)}
.btn-ghost-light{background:transparent;border-color:rgba(255,255,255,.55);color:#fff}
.btn-ghost-light:hover{background:rgba(255,255,255,.12);color:#fff}
.btn-sm-x{height:40px;padding:0 18px;font-size:14px}
.btn-arrow::before{content:"→";font-size:15px;transition:transform .22s ease;order:2}
.btn-arrow:hover::before{transform:translateX(4px)}

/* ---------- 徽章 ---------- */
.badge-x{
  display:inline-flex;align-items:center;height:26px;padding:0 10px;border-radius:2px;
  border:1px solid var(--ink);color:var(--ink);font-size:13px;font-weight:500;letter-spacing:.08em;
  background:transparent;
}
.badge-muted{border-color:var(--line);color:var(--muted);letter-spacing:.04em}

/* ---------- 移动抽屉 ---------- */
.nav-drawer{background:var(--paper);width:min(88vw,360px)}
.nav-drawer .offcanvas-header{padding:20px 20px 14px;border-bottom:1px solid var(--line)}
.nav-drawer .drawer-brand{font-size:17px;font-weight:700;color:var(--ink)}
.btn-close-x{
  width:38px;height:38px;border:1px solid var(--line);border-radius:var(--radius-btn);
  background:transparent;color:var(--ink);font-size:20px;line-height:1;cursor:pointer;
}
.nav-drawer .offcanvas-body{padding:8px 20px 24px;display:flex;flex-direction:column}
.drawer-link{
  height:48px;display:flex;align-items:center;border-bottom:1px solid var(--line);
  font-size:15px;font-weight:500;color:var(--text);
}
.drawer-link:hover{color:var(--ink)}
.drawer-cta{margin-top:22px;width:100%}

/* ---------- 面包屑 ---------- */
.crumb-bar{padding:22px 0 0}
.breadcrumb-x{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:12px;color:var(--muted);line-height:1.6;
}
.breadcrumb-x a{color:var(--muted)}
.breadcrumb-x a:hover{color:var(--ink)}
.breadcrumb-x .sep{color:#c3bfb5}
.breadcrumb-x .crumb-current{color:var(--ink);max-width:62vw;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* ---------- 文章头部 ---------- */
.article-head{padding:30px 0 40px;border-bottom:1px solid var(--line)}
.article-tag-line{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-bottom:20px}
.article-title{
  font-size:clamp(26px,3.4vw,36px);line-height:1.32;font-weight:700;color:var(--ink);
  max-width:900px;letter-spacing:.005em;
}
.article-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:18px;margin-top:22px;
  font-size:13px;color:var(--muted);
}
.article-meta .dot{width:4px;height:4px;border-radius:50%;background:var(--line)}
.share-btn{
  height:36px;padding:0 14px;border:1px solid var(--line);border-radius:var(--radius-btn);
  background:var(--white);color:var(--ink);font-size:13px;font-weight:500;cursor:pointer;
  transition:border-color .2s ease,background .2s ease;
}
.share-btn:hover{border-color:var(--ink-light);background:var(--sub)}

/* ---------- 正文布局 ---------- */
.article-main{padding:56px 0 24px}
.article-layout{
  display:grid;grid-template-columns:minmax(0,760px) 236px;
  gap:72px;justify-content:center;align-items:start;
}
.article-content{font-size:17px;line-height:1.9;color:var(--text);max-width:760px;width:100%}
.article-content p{margin:0 0 20px}
.article-content h2{
  position:relative;font-size:clamp(23px,2.6vw,28px);line-height:1.35;font-weight:700;
  color:var(--ink);margin:46px 0 18px;padding-left:16px;scroll-margin-top:110px;
}
.article-content h2::before{
  content:"";position:absolute;left:0;top:.36em;width:3px;height:22px;background:var(--lime);border-radius:1px;
}
.article-content h3{font-size:21px;line-height:1.45;font-weight:600;color:var(--ink);margin:34px 0 14px;scroll-margin-top:110px}
.article-content h4{font-size:18px;font-weight:600;color:var(--ink);margin:26px 0 12px}
.article-content ul,.article-content ol{margin:0 0 22px;padding-left:20px}
.article-content ul>li{position:relative;margin-bottom:10px;padding-left:4px}
.article-content ul>li::before{
  content:"";position:absolute;left:-16px;top:.72em;width:6px;height:6px;border-radius:1px;background:var(--lime);
}
.article-content ol{list-style:decimal}
.article-content ol>li{margin-bottom:10px}
.article-content blockquote{
  margin:0 0 24px;padding:20px 22px;background:var(--sub);border-left:3px solid var(--ink);
  color:#2b3532;font-size:16.5px;
}
.article-content blockquote p:last-child{margin-bottom:0}
.article-content img{border-radius:8px;margin:26px auto;width:100%;object-fit:cover}
.article-content figure{margin:26px 0}
.article-content figcaption{font-size:13px;color:var(--muted);text-align:center;margin-top:10px;line-height:1.7}
.article-content a{border-bottom:1px solid rgba(18,60,54,.28)}
.article-content a:hover{border-bottom-color:var(--ink-dark)}
.article-content hr{border:0;border-top:1px solid var(--line);margin:38px 0}
.article-content table{width:100%;border-collapse:collapse;margin:0 0 24px;font-size:15px}
.article-content th,.article-content td{border:1px solid var(--line);padding:12px 14px;text-align:left}
.article-content th{background:var(--sub);color:var(--ink);font-weight:600}

/* ---------- 空态 ---------- */
.empty-state{
  border:1px dashed var(--line);border-radius:var(--radius-card);padding:40px 28px;
  text-align:center;background:var(--white);
}
.empty-state p.t1{font-size:18px;font-weight:600;color:var(--ink);margin-bottom:8px}
.empty-state p.t2{font-size:14px;color:var(--muted);margin-bottom:20px}

/* ---------- 目录 ---------- */
.article-toc{position:sticky;top:104px}
.toc-title{
  font-size:13px;font-weight:600;letter-spacing:.08em;color:var(--muted);
  padding-bottom:12px;border-bottom:1px solid var(--line);margin-bottom:14px;
}
.toc-list{display:flex;flex-direction:column}
.toc-list a{
  position:relative;font-size:14px;line-height:1.7;color:var(--muted);padding:8px 0 8px 12px;
  border-left:2px solid transparent;transition:color .2s ease,border-color .2s ease;
}
.toc-list a:hover{color:var(--ink)}
.toc-list a.is-current{color:var(--ink);font-weight:600;border-left-color:var(--lime)}

/* ---------- 文末 ---------- */
.article-foot{padding:8px 0 72px}
.foot-divider{border-top:1px solid var(--line);margin:34px 0 26px;max-width:760px}
.tag-row{display:flex;flex-wrap:wrap;gap:10px;max-width:760px}
.tag-chip{
  display:inline-flex;align-items:center;height:30px;padding:0 12px;border:1px solid var(--line);
  border-radius:2px;font-size:13px;color:var(--muted);background:var(--white);
  transition:border-color .2s ease,color .2s ease;
}
.tag-chip:hover{border-color:var(--ink-light);color:var(--ink)}
.back-row{max-width:760px;margin:34px 0 0;text-align:center}
.back-row a{
  display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:600;color:var(--ink);
}
.back-row a::before{content:"←";transition:transform .22s ease}
.back-row a:hover::before{transform:translateX(-4px)}

/* ---------- 相关推荐 ---------- */
.related{padding:64px 0;border-top:1px solid var(--line);background:var(--paper)}
.related-head{display:flex;align-items:baseline;justify-content:space-between;gap:20px;margin-bottom:34px}
.related-head h2{font-size:clamp(22px,2.6vw,30px);font-weight:700;color:var(--ink);line-height:1.3}
.related-head .hint{font-size:14px;color:var(--muted)}
.rel-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.rel-card{
  display:flex;flex-direction:column;border:1px solid var(--line);border-radius:var(--radius-card);
  overflow:hidden;background:var(--white);box-shadow:var(--shadow-1);
  transition:transform .3s ease,box-shadow .3s ease,border-color .3s ease;
}
.rel-card:hover{transform:translateY(-2px);border-color:#cfd9d4;box-shadow:var(--shadow-2)}
.rel-thumb{aspect-ratio:16/9;overflow:hidden;background:var(--sub);position:relative}
.rel-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .7s ease-out}
.rel-card:hover .rel-thumb img{transform:scale(1.04)}
.rel-body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:10px}
.rel-body h3{font-size:17px;line-height:1.55;font-weight:600;color:var(--text)}
.rel-card:hover .rel-body h3{color:var(--ink)}
.rel-body .rel-meta{font-size:13px;color:var(--muted)}

/* ---------- 深色 CTA ---------- */
.cta-dark{
  background:var(--dark);border-radius:var(--radius-cover);color:#fff;
  padding:72px 48px;position:relative;overflow:hidden;margin:0 0 72px;
}
.cta-dark::after{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.04;
  background-image:linear-gradient(rgba(255,255,255,.9) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.9) 1px,transparent 1px);
  background-size:38px 38px;
}
.cta-inner{position:relative;z-index:2;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:32px}
.cta-inner h2{font-size:clamp(22px,2.8vw,32px);font-weight:700;line-height:1.32;max-width:620px}
.cta-inner p{margin-top:12px;font-size:15px;color:rgba(255,255,255,.72);max-width:620px;line-height:1.85}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--sub);border-top:1px solid var(--line);padding:64px 0 26px}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px}
.foot-brand{font-size:18px;font-weight:700;color:var(--ink);margin-bottom:16px}
.site-footer p{font-size:14px;color:var(--muted);line-height:1.85;margin-bottom:10px;max-width:340px}
.foot-title{font-size:14px;font-weight:600;color:var(--text);margin-bottom:16px}
.foot-list{display:flex;flex-direction:column;gap:10px}
.foot-list a{font-size:14px;color:var(--muted);transition:color .2s ease,transform .2s ease;display:inline-block}
.foot-list a:hover{color:var(--ink);transform:translateX(3px)}
.foot-bottom{
  margin-top:48px;padding-top:22px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;font-size:13px;color:var(--muted);
}

/* ---------- 动效 ---------- */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .48s cubic-bezier(.22,.61,.36,1),transform .48s cubic-bezier(.22,.61,.36,1)}
.reveal.is-in{opacity:1;transform:none}

/* ---------- 响应式 ---------- */
@media (max-width:1199px){
  .article-layout{grid-template-columns:minmax(0,1fr) 210px;gap:44px}
  .nav-left{gap:14px}
  .nav-link-x{font-size:14px}
}
@media (max-width:991px){
  .nav-left,.nav-right .nav-link-x,.nav-right .icon-btn{display:none}
  .nav-right{gap:10px}
  .menu-toggle{display:flex}
  .header-inner{grid-template-columns:auto 1fr auto;height:70px}
  .brand{font-size:17px;justify-self:center}
  .site-header .nav-right .btn-x{display:none}
  .article-toc{display:none}
  .article-layout{grid-template-columns:minmax(0,1fr);gap:0;justify-content:stretch}
  .article-content{margin:0 auto}
  .rel-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .foot-grid{grid-template-columns:1fr 1fr;gap:32px}
  .cta-dark{padding:52px 28px;margin-bottom:56px}
  .breadcrumb-x .crumb-current{max-width:78vw}
}
@media (max-width:767px){
  .container{padding:0 18px}
  .header-inner{padding:0 18px}
  .article-main{padding:40px 0 16px}
  .article-head{padding:22px 0 30px}
  .article-content{font-size:16.5px}
  .article-content h2{font-size:22px;margin-top:36px}
  .related{padding:48px 0}
  .rel-grid{grid-template-columns:minmax(0,1fr)}
  .site-footer{padding:48px 0 22px}
  .foot-bottom{flex-direction:column}
}
@media (max-width:575px){
  .brand{font-size:16px}
  .article-meta{gap:12px;font-size:12.5px}
  .cta-inner{flex-direction:column;align-items:flex-start}
  .cta-actions{width:100%}
  .cta-actions .btn-x{width:100%}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
}

/* roulang page: category3 */
:root{
  --ink:#123C36;
  --ink-dark:#0C2A26;
  --ink-light:#2C5B54;
  --lime:#C2E63C;
  --bg:#F7F6F2;
  --surface:#FFFFFF;
  --surface-2:#EFEDE7;
  --line:#E2DFD7;
  --text:#1B1F1D;
  --muted:#626B66;
  --dark:#0E1A18;

  --r-btn:6px;
  --r-card:8px;
  --r-lg:12px;
  --r-badge:2px;

  --sh-1:0 1px 2px rgba(14,26,24,.05);
  --sh-2:0 12px 32px -12px rgba(14,26,24,.18);

  --bs-body-bg:var(--bg);
  --bs-body-color:var(--text);
  --bs-primary:var(--ink);
  --bs-primary-rgb:18,60,54;
  --bs-link-color:var(--ink);
  --bs-link-hover-color:var(--ink-dark);
  --bs-border-radius:8px;
  --bs-border-color:var(--line);
  --bs-font-sans-serif:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",sans-serif;
  --bs-accordion-btn-focus-box-shadow:none;
  --bs-accordion-active-bg:transparent;
  --bs-accordion-active-color:var(--ink);
  --bs-accordion-border-color:var(--line);
  --bs-body-font-size:16px;
}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"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{max-width:100%;display:block}
a{color:var(--ink);text-decoration:none}
a:hover{color:var(--ink-dark)}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--lime);outline-offset:2px}

.num{font-variant-numeric:tabular-nums;letter-spacing:.02em}

.container{max-width:1280px;margin-inline:auto;padding-inline:24px;width:100%}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(255,255,255,.86);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .25s ease;
}
.site-header.scrolled{box-shadow:0 8px 26px -18px rgba(14,26,24,.5)}
.nav-grid{
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  gap:16px;
  min-height:76px;
}
.nav-left{display:flex;align-items:center;gap:2px;flex-wrap:nowrap}
.nav-right{display:flex;align-items:center;justify-content:flex-end;gap:6px}

.brand{
  display:inline-flex;align-items:center;gap:8px;
  font-size:19px;font-weight:700;line-height:1.2;
  color:var(--ink);white-space:nowrap;letter-spacing:.01em;
}
.brand:hover{color:var(--ink-dark)}
.brand .dot{width:8px;height:8px;border-radius:2px;background:var(--lime);flex:0 0 auto}
.brand .key{border-bottom:2px solid var(--lime);padding-bottom:1px}

.nav-link-x{
  position:relative;display:inline-flex;align-items:center;
  padding:8px 12px;min-height:44px;
  font-size:15px;font-weight:500;color:var(--text);
  border-radius:6px;transition:color .2s ease;white-space:nowrap;
}
.nav-link-x::after{
  content:"";position:absolute;left:12px;right:12px;bottom:4px;height:2px;
  background:var(--lime);transform:scaleX(0);transform-origin:left;
  transition:transform .22s ease;
}
.nav-link-x:hover{color:var(--ink)}
.nav-link-x:hover::after{transform:scaleX(1)}
.nav-link-x.active{color:var(--ink);font-weight:700}
.nav-link-x.active::after{transform:scaleX(1)}
.nav-link-x.active::before{
  content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:3px;height:16px;border-radius:2px;background:var(--lime);
}
.icon-btn{
  width:44px;height:44px;display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--line);border-radius:6px;background:transparent;color:var(--ink);
  transition:background .2s ease,border-color .2s ease;
}
.icon-btn:hover{background:var(--surface-2);border-color:var(--ink-light)}
.icon-btn svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}

/* buttons */
.btn-x{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  height:46px;padding:0 24px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;line-height:1;border:1px solid transparent;
  cursor:pointer;position:relative;overflow:hidden;
  transition:background .22s ease,color .22s ease,border-color .22s ease,transform .12s ease;
}
.btn-x:active{transform:scale(.985)}
.btn-sm-x{height:44px;padding:0 18px;font-size:14px}
.btn-primary-x{background:var(--ink);color:#fff}
.btn-primary-x:hover{background:var(--ink-dark);color:#fff}
.btn-primary-x::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--lime);
  transform:scaleX(0);transform-origin:left;transition:transform .22s ease;
}
.btn-primary-x:hover::after{transform:scaleX(1)}
.btn-outline-x{background:transparent;border-color:var(--ink);color:var(--ink)}
.btn-outline-x:hover{background:rgba(18,60,54,.08);color:var(--ink-dark)}
.btn-lime-x{background:var(--lime);color:var(--ink)}
.btn-lime-x:hover{background:#b4da2c;color:var(--ink-dark)}
.btn-ghost-x{background:transparent;border-color:rgba(255,255,255,.45);color:#fff}
.btn-ghost-x:hover{background:rgba(255,255,255,.1);color:#fff}
.btn-x .arrow{margin-left:2px}
.btn-x:hover .arrow{transform:translateX(3px)}
.arrow{
  display:inline-block;width:18px;height:9px;position:relative;
  transition:transform .22s ease;flex:0 0 auto;
}
.arrow::before{content:"";position:absolute;left:0;top:50%;width:14px;height:1px;background:currentColor;transform:translateY(-50%)}
.arrow::after{
  content:"";position:absolute;right:1px;top:50%;width:6px;height:6px;
  border-top:1px solid currentColor;border-right:1px solid currentColor;
  transform:translateY(-50%) rotate(45deg);
}

/* search panel */
.search-panel{
  display:none;border-top:1px solid var(--line);background:#fff;
}
.search-panel.open{display:block}
.search-form{display:flex;gap:10px;padding:14px 0 18px;max-width:640px}
.input-x{
  flex:1;height:46px;padding:0 14px;border:1px solid var(--line);border-radius:6px;
  background:#fff;font-size:15px;color:var(--text);transition:border-color .2s ease;
}
.input-x::placeholder{color:#9AA39E}
.input-x:focus{outline:none;border-color:var(--ink);box-shadow:0 0 0 2px var(--lime)}

/* mobile bar */
.nav-mobile{display:none;align-items:center;justify-content:space-between;min-height:64px;gap:12px}
.nav-mobile .brand{font-size:16px}
.hamburger{
  width:44px;height:44px;border:1px solid var(--line);border-radius:6px;background:#fff;
  display:inline-flex;align-items:center;justify-content:center;gap:4px;flex-direction:column;
}
.hamburger span{display:block;width:18px;height:1.6px;background:var(--ink)}

/* offcanvas */
.drawer-x{background:var(--bg);width:86vw;max-width:360px;border-left:1px solid var(--line)}
.drawer-x .offcanvas-header{border-bottom:1px solid var(--line);padding:18px 20px}
.drawer-x .offcanvas-body{padding:0 20px 20px;display:flex;flex-direction:column}
.drawer-title{font-size:16px;font-weight:700;color:var(--ink);margin:0}
.drawer-list{list-style:none;margin:0;padding:0}
.drawer-list li{border-bottom:1px solid var(--line)}
.drawer-list a{
  display:flex;align-items:center;justify-content:space-between;
  min-height:48px;font-size:15px;color:var(--text);
}
.drawer-list a.active{color:var(--ink);font-weight:700}
.drawer-cta{margin-top:auto;padding-top:20px}

/* ---------- page head ---------- */
.page-head{
  position:relative;overflow:hidden;
  padding:40px 0 52px;
  background:linear-gradient(180deg,#F7F6F2 0%,#EFEDE7 100%);
  border-bottom:1px solid var(--line);
}
.page-head::after{
  content:"";position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-1.webp');
  background-size:cover;background-position:center;opacity:.09;pointer-events:none;
}
.page-head .container{position:relative;z-index:1}
.crumbs{font-size:12px;color:var(--muted);margin-bottom:22px;letter-spacing:.02em}
.crumbs a{color:var(--muted)}
.crumbs a:hover{color:var(--ink)}
.crumbs span.sep{margin:0 8px;color:#B9BDB6}
.crumbs .now{color:var(--ink);font-weight:600}
.eyebrow{
  display:inline-block;font-size:13px;font-weight:600;letter-spacing:.08em;
  color:var(--ink);border:1px solid var(--ink);border-radius:var(--r-badge);
  padding:3px 10px;margin-bottom:18px;background:rgba(255,255,255,.6);
}
.page-head h1{
  font-size:clamp(30px,5vw,52px);
  line-height:1.14;font-weight:700;color:var(--ink-dark);
  margin:0 0 16px;max-width:900px;letter-spacing:.005em;
}
.page-lede{
  font-size:16px;line-height:1.95;color:var(--muted);
  max-width:760px;margin:0;
}
.head-meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.chip{
  display:inline-flex;align-items:center;font-size:13px;font-weight:500;
  letter-spacing:.06em;border:1px solid var(--line);border-radius:var(--r-badge);
  padding:4px 10px;color:var(--muted);background:rgba(255,255,255,.7);
}
.chip-ink{border-color:var(--ink);color:var(--ink)}

/* ---------- sections ---------- */
.section{padding:72px 0}
.section-tight{padding:56px 0}
.section-head{margin-bottom:40px;max-width:760px}
.section-head h2{
  position:relative;font-size:clamp(26px,3.4vw,36px);line-height:1.28;font-weight:700;
  color:var(--ink-dark);margin:0 0 14px;padding-left:16px;
}
.section-head h2::before{
  content:"";position:absolute;left:0;top:.28em;width:3px;height:24px;background:var(--lime);border-radius:2px;
}
.section-head p{margin:0;color:var(--muted);font-size:16px;line-height:1.9}

/* ---------- reading column ---------- */
.reading-col{max-width:860px;margin-inline:auto}
.prose-block{margin-bottom:44px}
.prose-block h2{
  position:relative;font-size:clamp(22px,2.6vw,27px);line-height:1.35;font-weight:700;
  color:var(--ink-dark);margin:0 0 18px;padding-left:16px;
}
.prose-block h2::before{
  content:"";position:absolute;left:0;top:.3em;width:3px;height:22px;background:var(--lime);border-radius:2px;
}
.prose-block p{font-size:16.5px;line-height:1.95;color:var(--text);margin:0 0 18px}
.prose-block p:last-child{margin-bottom:0}
.block-index{
  display:block;font-size:64px;line-height:1;font-weight:700;
  color:rgba(18,60,54,.14);margin-bottom:6px;font-variant-numeric:tabular-nums;
}
.tip{
  border-left:3px solid var(--ink);background:var(--surface-2);
  padding:18px 20px;border-radius:0 var(--r-card) var(--r-card) 0;
  font-size:15px;line-height:1.9;color:var(--ink-dark);margin:22px 0 0;
}
.checklist{list-style:none;margin:22px 0 0;padding:0;border-top:1px solid var(--line)}
.checklist li{
  display:flex;gap:12px;align-items:flex-start;
  padding:14px 0;border-bottom:1px solid var(--line);
  font-size:15.5px;line-height:1.85;
}
.checklist li::before{
  content:"";flex:0 0 auto;width:8px;height:8px;margin-top:9px;
  background:var(--lime);border-radius:1px;
}
.checklist strong{color:var(--ink-dark);font-weight:600}

/* figure */
.inline-figure{margin:0 0 44px}
.inline-figure .ph{
  position:relative;aspect-ratio:16/9;border-radius:var(--r-lg);overflow:hidden;
  border:1px solid var(--line);background:var(--surface-2);
}
.inline-figure .ph::after{
  content:"";position:absolute;inset:0;background:rgba(18,60,54,.06);pointer-events:none;
}
.inline-figure img{width:100%;height:100%;object-fit:cover}
.inline-figure figcaption{
  font-size:13px;color:var(--muted);line-height:1.7;margin-top:12px;
}

/* ---------- related ---------- */
.rel-list{border-top:1px solid var(--line);margin-top:8px}
.rel-item{
  display:grid;grid-template-columns:1fr auto;align-items:center;gap:8px 20px;
  padding:24px 12px;border-bottom:1px solid var(--line);
  transition:background .22s ease;
}
.rel-item:hover{background:var(--surface-2);color:var(--ink)}
.rel-item .rel-name{font-size:18px;font-weight:600;color:var(--ink-dark);display:block}
.rel-item .rel-desc{font-size:14px;color:var(--muted);display:block;grid-column:1/2;margin-top:4px}
.rel-item .arrow{grid-column:2;grid-row:1/3;color:var(--ink);transition:transform .22s ease}
.rel-item:hover .arrow{transform:translateX(4px)}

/* ---------- faq ---------- */
.faq-wrap{max-width:860px;margin-inline:auto}
.faq .accordion-item{background:transparent;border:0;border-top:1px solid var(--line)}
.faq .accordion-item:last-child{border-bottom:1px solid var(--line)}
.faq .accordion-button{
  position:relative;background:transparent;border:0;border-radius:0;
  min-height:64px;padding:20px 56px 20px 16px;
  font-size:16px;font-weight:600;color:var(--text);line-height:1.6;
  box-shadow:none;
}
.faq .accordion-button:not(.collapsed){color:var(--ink);background:transparent}
.faq .accordion-button:not(.collapsed)::before{
  content:"";position:absolute;left:0;top:16px;bottom:16px;width:3px;background:var(--lime);border-radius:2px;
}
.faq .accordion-button::after{display:none}
.faq .accordion-button:focus{box-shadow:none;outline:2px solid var(--lime);outline-offset:-2px}
.faq .pm{position:absolute;right:16px;top:50%;width:15px;height:15px;transform:translateY(-50%)}
.faq .pm::before{content:"";position:absolute;left:0;top:7px;width:15px;height:1.5px;background:var(--ink)}
.faq .pm::after{
  content:"";position:absolute;left:7px;top:0;width:1.5px;height:15px;background:var(--ink);
  transition:transform .2s ease,opacity .2s ease;
}
.faq .accordion-button:not(.collapsed) .pm::after{transform:scaleY(0);opacity:0}
.faq .accordion-body{
  padding:0 56px 26px 16px;font-size:15.5px;line-height:1.9;color:var(--muted);
}

/* ---------- cta ---------- */
.cta-block{
  position:relative;overflow:hidden;
  background:var(--dark);border-radius:var(--r-lg);
  padding:64px 48px;color:#fff;
}
.cta-block::before{
  content:"";position:absolute;inset:0;opacity:.04;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.9) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.9) 1px,transparent 1px);
  background-size:32px 32px;
}
.cta-inner{position:relative;z-index:1;display:grid;grid-template-columns:1.4fr 1fr;gap:36px;align-items:center}
.cta-block h2{font-size:clamp(24px,3vw,32px);line-height:1.3;font-weight:700;margin:0 0 12px}
.cta-block p{margin:0;color:rgba(255,255,255,.72);font-size:15.5px;line-height:1.9;max-width:560px}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;justify-content:flex-end}
.cta-links{margin-top:22px;font-size:14px;color:rgba(255,255,255,.6)}
.cta-links a{color:var(--lime)}
.cta-links a:hover{color:#fff}

/* ---------- footer ---------- */
.site-footer{background:var(--surface-2);border-top:1px solid var(--line);padding:64px 0 28px;margin-top:0}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:36px}
.foot-brand{font-size:18px;font-weight:700;color:var(--ink);margin-bottom:14px}
.foot-grid p{font-size:14px;line-height:1.85;color:var(--muted);margin:0 0 12px}
.foot-title{font-size:14px;font-weight:600;color:var(--ink-dark);margin:0 0 14px}
.foot-list{list-style:none;margin:0;padding:0}
.foot-list li{margin-bottom:10px}
.foot-list a{
  font-size:14px;color:var(--muted);display:inline-block;
  transition:transform .2s ease,color .2s ease;
}
.foot-list a:hover{color:var(--ink);transform:translateX(3px)}
.foot-bottom{
  display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;
  border-top:1px solid var(--line);margin-top:44px;padding-top:22px;
  font-size:13px;color:var(--muted);
}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .48s cubic-bezier(.22,.61,.36,1),transform .48s cubic-bezier(.22,.61,.36,1)}
.reveal.in{opacity:1;transform:none}

/* ---------- responsive ---------- */
@media (max-width:1199px){
  .nav-link-x{padding:8px 9px;font-size:14.5px}
  .brand{font-size:18px}
}
@media (max-width:991px){
  .nav-desktop{display:none}
  .nav-mobile{display:flex}
  .section{padding:56px 0}
  .section-tight{padding:44px 0}
  .cta-inner{grid-template-columns:1fr;gap:24px}
  .cta-actions{justify-content:flex-start}
  .cta-block{padding:44px 26px}
  .foot-grid{grid-template-columns:1fr 1fr}
  .page-head{padding:28px 0 40px}
}
@media (max-width:767px){
  .container{padding-inline:18px}
  .prose-block p{font-size:16px}
  .block-index{font-size:48px}
  .faq .accordion-body{padding-right:24px}
  .cta-actions .btn-x{width:100%}
}
@media (max-width:575px){
  .nav-mobile .brand{font-size:15px}
  .section{padding:48px 0}
  .foot-grid{grid-template-columns:1fr}
  .rel-item{padding:20px 8px}
  .search-form{flex-direction:column}
  .search-form .btn-x{width:100%}
  .page-head h1{font-size:clamp(26px,7vw,34px)}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{transition:none!important;animation:none!important}
  .reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
}

/* roulang page: category4 */
:root{
  --ink:#123C36;
  --ink-d:#0C2A26;
  --ink-l:#2C5B54;
  --lime:#C2E63C;
  --paper:#F7F6F2;
  --card:#FFFFFF;
  --sub:#EFEDE7;
  --line:#E2DFD7;
  --text:#1B1F1D;
  --muted:#626B66;
  --dark:#0E1A18;
  --r-btn:6px;
  --r-card:8px;
  --r-big:12px;
  --r-badge:2px;
  --sh-1:0 1px 2px rgba(14,26,24,.05);
  --sh-2:0 12px 32px -12px rgba(14,26,24,.18);
  --sp-sec:88px;
  --bs-body-bg:var(--paper);
  --bs-body-color:var(--text);
  --bs-primary:#123C36;
  --bs-link-color:#123C36;
  --bs-link-hover-color:#0C2A26;
  --bs-border-radius:8px;
  --bs-font-sans-serif:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",sans-serif;
  --bs-body-font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",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(--text);
  font-family:"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{max-width:100%;display:block;height:auto}
a{color:var(--ink);text-decoration:none}
a:hover{color:var(--ink-d)}
button{font-family:inherit}
h1,h2,h3{margin:0;color:var(--ink);letter-spacing:.01em}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--lime);outline-offset:2px;border-radius:4px}

body .container{width:100%;max-width:1280px;margin:0 auto;padding-left:24px;padding-right:24px}
.num{font-variant-numeric:tabular-nums;letter-spacing:.02em}

/* ============ HEADER ============ */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:1030;height:76px;
  background:rgba(255,255,255,.86);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);transition:box-shadow .25s ease;
}
.site-header.is-scrolled{box-shadow:0 6px 24px -14px rgba(14,26,24,.28)}
.header-inner{
  height:76px;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:16px;
}
.nav-left{display:flex;align-items:center;gap:6px;justify-self:start}
.nav-right{display:flex;align-items:center;gap:6px;justify-self:end}
.nav-link-x{
  position:relative;display:inline-flex;align-items:center;height:44px;padding:0 12px;
  font-size:15px;font-weight:500;color:var(--ink);white-space:nowrap;transition:color .2s ease;
}
.nav-link-x::after{
  content:"";position:absolute;left:12px;right:12px;bottom:9px;height:2px;background:var(--lime);
  transform:scaleX(0);transform-origin:left center;transition:transform .22s ease;
}
.nav-link-x:hover::after{transform:scaleX(1)}
.nav-link-x.active{font-weight:700;color:var(--ink-d)}
.nav-link-x.active::before{
  content:"";position:absolute;left:0;top:13px;bottom:13px;width:3px;background:var(--lime);border-radius:2px;
}
.nav-link-x.active::after{transform:scaleX(1)}
.brand{
  justify-self:center;font-size:19px;font-weight:700;color:var(--ink);letter-spacing:.01em;
  height:40px;display:inline-flex;align-items:center;position:relative;white-space:nowrap;
}
.brand::after{
  content:"";position:absolute;left:2px;right:2px;bottom:2px;height:3px;background:var(--lime);opacity:.85;border-radius:2px;
}
.icon-btn{
  width:44px;height:44px;display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--line);background:#fff;border-radius:var(--r-btn);color:var(--ink);
  transition:border-color .2s ease,background .2s ease;
}
.icon-btn:hover{border-color:var(--ink-l);background:var(--sub)}
.icon-btn svg{width:18px;height:18px}
.btn-x{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;height:44px;padding:0 24px;
  border-radius:var(--r-btn);font-size:15px;font-weight:600;border:1px solid transparent;
  transition:background .22s ease,color .22s ease,border-color .22s ease,transform .12s ease,box-shadow .22s ease;
  position:relative;overflow:hidden;cursor:pointer;
}
.btn-x:active{transform:scale(.985)}
.btn-x .arw{transition:transform .22s ease}
.btn-x:hover .arw{transform:translateX(3px)}
.btn-primary-x{background:var(--ink);color:#fff}
.btn-primary-x::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--lime);
  transform:translateY(3px);transition:transform .22s ease;
}
.btn-primary-x:hover{background:var(--ink-d);color:#fff}
.btn-primary-x:hover::after{transform:translateY(0)}
.btn-ghost-x{background:transparent;color:var(--ink);border-color:var(--ink)}
.btn-ghost-x:hover{background:rgba(18,60,54,.08);color:var(--ink-d)}
.btn-lime-x{background:var(--lime);color:var(--ink-d)}
.btn-lime-x:hover{background:#d3f04f;color:var(--ink-d)}
.btn-line-x{background:transparent;color:#fff;border-color:rgba(255,255,255,.45)}
.btn-line-x:hover{background:rgba(255,255,255,.1);color:#fff}
.btn-sm-x{height:40px;padding:0 18px;font-size:14px}
.hamburger{
  width:44px;height:44px;border:1px solid var(--line);background:#fff;border-radius:var(--r-btn);
  display:none;align-items:center;justify-content:center;
}
.hamburger span{display:block;width:18px;height:2px;background:var(--ink);position:relative}
.hamburger span::before,.hamburger span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--ink);
}
.hamburger span::before{top:-6px}.hamburger span::after{top:6px}

/* offcanvas */
.offcanvas{background:var(--paper);border-left:1px solid var(--line)}
.offcanvas-header{border-bottom:1px solid var(--line);padding:16px 20px}
.offcanvas-title{font-size:17px;font-weight:700;color:var(--ink)}
.offcanvas-body{padding:8px 20px 24px}
.drawer-link{
  display:flex;align-items:center;justify-content:space-between;min-height:48px;
  border-bottom:1px solid var(--line);font-size:15px;font-weight:500;color:var(--ink);
}
.drawer-link.active{font-weight:700;border-left:3px solid var(--lime);padding-left:10px}
.drawer-cta{margin-top:20px}
.btn-close:focus{box-shadow:none}

/* ============ MAIN ============ */
main{padding-top:76px}
.page-head{
  background:linear-gradient(180deg,#FFFFFF 0%, var(--sub) 100%);
  border-bottom:1px solid var(--line);
  padding:44px 0 48px;
}
.breadcrumb-x{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:12px;color:var(--muted);margin-bottom:18px}
.breadcrumb-x a{color:var(--muted)}
.breadcrumb-x a:hover{color:var(--ink)}
.breadcrumb-x .sep{color:var(--line)}
.breadcrumb-x .cur{color:var(--ink);font-weight:600}
.page-head h1{font-size:clamp(28px,4.4vw,46px);line-height:1.16;font-weight:700;max-width:22em}
.page-head .lead-x{margin-top:16px;font-size:16px;color:var(--muted);max-width:56em}
.head-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:20px}
.badge-x{
  display:inline-flex;align-items:center;height:26px;padding:0 10px;border-radius:var(--r-badge);
  border:1px solid var(--ink);color:var(--ink);font-size:13px;font-weight:500;letter-spacing:.08em;
}
.badge-muted{border-color:var(--line);color:var(--muted);letter-spacing:.04em}

section.block{padding:var(--sp-sec) 0}
section.block.tight{padding:0 0 var(--sp-sec)}
.sec-head{display:flex;align-items:flex-start;justify-content:space-between;gap:24px;flex-wrap:wrap;margin-bottom:36px}
.sec-head h2{position:relative;font-size:clamp(24px,3vw,34px);line-height:1.28;font-weight:700;padding-left:16px}
.sec-head h2::before{
  content:"";position:absolute;left:0;top:6px;bottom:6px;width:3px;background:var(--lime);border-radius:2px;
}
.sec-head .sec-note{font-size:14px;color:var(--muted);max-width:34em;align-self:flex-end}

/* overview compare */
.compare-overview{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.ov-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-big);
  padding:28px;box-shadow:var(--sh-1);transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
}
.ov-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:var(--ink-l)}
.ov-card .ov-label{font-size:13px;letter-spacing:.08em;color:var(--muted);font-weight:600}
.ov-card h3{font-size:22px;font-weight:600;margin-top:10px}
.ov-card p{margin-top:12px;color:var(--muted);font-size:15.5px}
.ov-list{margin-top:20px;border-top:1px solid var(--line)}
.ov-list li{padding:12px 0;border-bottom:1px solid var(--line);font-size:15px;display:flex;gap:10px}
.ov-list li::before{content:"";flex:0 0 6px;height:6px;background:var(--lime);margin-top:12px;border-radius:1px}
.ov-figure{margin-top:22px;border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;background:var(--sub);aspect-ratio:16/9}
.ov-figure img{width:100%;height:100%;object-fit:cover}

/* quick look */
.quick-look{
  background:var(--sub);border-left:3px solid var(--lime);border-radius:var(--r-card);
  padding:30px 32px;display:grid;grid-template-columns:260px 1fr;gap:32px;align-items:start;
}
.quick-look h2{font-size:22px;font-weight:700;position:relative;padding-left:0}
.quick-look h2::before{display:none}
.quick-look .ql-sub{margin-top:10px;font-size:14px;color:var(--muted)}
.ql-points{display:grid;grid-template-columns:repeat(2,1fr);gap:12px 32px}
.ql-points li{display:flex;gap:10px;font-size:15px;padding:8px 0;border-bottom:1px dashed var(--line)}
.ql-points li::before{content:"";flex:0 0 6px;height:6px;background:var(--ink);margin-top:12px;border-radius:1px}

/* compare rows */
.cmp-row{
  display:grid;grid-template-columns:360px 1fr;gap:40px;
  padding:36px 0;border-bottom:1px solid var(--line);
}
.cmp-row:last-child{border-bottom:0}
.point-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  padding:24px;box-shadow:var(--sh-1);position:sticky;top:100px;
}
.point-card .idx{
  font-size:14px;font-weight:700;color:var(--muted);letter-spacing:.14em;
}
.point-card h3{font-size:21px;font-weight:600;margin-top:10px;line-height:1.35}
.point-card ul{margin-top:16px;border-top:1px solid var(--line)}
.point-card ul li{
  padding:10px 0;border-bottom:1px solid var(--line);font-size:14.5px;color:var(--muted);display:flex;gap:10px;
}
.point-card ul li::before{content:"";flex:0 0 5px;height:5px;background:var(--lime);margin-top:11px;border-radius:1px}
.cmp-text h3{font-size:clamp(20px,2.2vw,25px);font-weight:600;line-height:1.4;padding-left:14px;position:relative}
.cmp-text h3::before{
  content:"";position:absolute;left:0;top:5px;bottom:5px;width:3px;background:var(--lime);border-radius:2px;
}
.cmp-text p{margin-top:16px;font-size:16.5px;color:#2b3230}
.cmp-text p + p{margin-top:16px}
.cmp-text .figure{margin-top:24px;border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;background:var(--sub);aspect-ratio:16/9}
.cmp-text .figure img{width:100%;height:100%;object-fit:cover;transition:transform .7s ease-out}
.cmp-text .figure:hover img{transform:scale(1.04)}
.cmp-text .figure figcaption{font-size:13px;color:var(--muted);padding:10px 14px;background:#fff;border-top:1px solid var(--line)}

/* related */
.related-list{border-top:1px solid var(--line)}
.related-list a{
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  min-height:76px;padding:18px 12px;border-bottom:1px solid var(--line);transition:background .22s ease;
}
.related-list a:hover{background:var(--sub)}
.related-list .rl-name{font-size:17px;font-weight:600;color:var(--ink)}
.related-list .rl-desc{display:block;font-size:14px;color:var(--muted);font-weight:400;margin-top:4px}
.arrow-x{
  flex:0 0 auto;width:22px;height:22px;position:relative;transition:transform .22s ease;
}
.arrow-x::before{
  content:"";position:absolute;top:50%;left:0;width:16px;height:1.5px;background:var(--ink);transform:translateY(-50%);
}
.arrow-x::after{
  content:"";position:absolute;top:50%;right:2px;width:7px;height:7px;
  border-top:1.5px solid var(--ink);border-right:1.5px solid var(--ink);
  transform:translateY(-50%) rotate(45deg);
}
.related-list a:hover .arrow-x{transform:translateX(4px)}

/* FAQ */
.faq-wrap{background:var(--card);border:1px solid var(--line);border-radius:var(--r-big);padding:8px 28px}
.accordion-x .accordion-item{background:transparent;border:0;border-bottom:1px solid var(--line)}
.accordion-x .accordion-item:last-child{border-bottom:0}
.accordion-x .accordion-button{
  background:transparent;box-shadow:none;color:var(--ink);font-size:16px;font-weight:600;
  min-height:64px;padding:18px 44px 18px 0;border:0;position:relative;
}
.accordion-x .accordion-button:not(.collapsed){color:var(--ink-d)}
.accordion-x .accordion-button:not(.collapsed)::before{
  content:"";position:absolute;left:-20px;top:14px;bottom:14px;width:3px;background:var(--lime);border-radius:2px;
}
.accordion-x .accordion-button::after{
  content:"";position:absolute;right:6px;top:50%;width:14px;height:14px;margin:0;transform:translateY(-50%);
  background:none;border:0;
  background-image:linear-gradient(var(--ink),var(--ink)),linear-gradient(var(--ink),var(--ink));
  background-size:14px 1.6px,1.6px 14px;background-position:center,center;background-repeat:no-repeat;
  transition:transform .2s ease,opacity .2s ease;
}
.accordion-x .accordion-button:not(.collapsed)::after{
  transform:translateY(-50%) rotate(90deg);opacity:.45;
}
.accordion-x .accordion-button:focus{box-shadow:none;outline:none}
.accordion-x .accordion-button:focus-visible{outline:2px solid var(--lime);outline-offset:2px}
.accordion-x .accordion-body{padding:0 0 24px;font-size:15.5px;color:#2b3230}

/* CTA */
.cta-x{
  background:var(--dark);border-radius:var(--r-big);padding:64px 48px;position:relative;overflow:hidden;
  display:grid;grid-template-columns:1fr auto;gap:36px;align-items:center;
}
.cta-x::before{
  content:"";position:absolute;inset:0;opacity:.04;pointer-events:none;
  background-image:linear-gradient(#fff 1px,transparent 1px),linear-gradient(90deg,#fff 1px,transparent 1px);
  background-size:44px 44px;
}
.cta-x h2{color:#fff;font-size:clamp(23px,2.8vw,32px);line-height:1.3;position:relative;padding-left:0}
.cta-x h2::before{display:none}
.cta-x p{color:rgba(255,255,255,.72);margin-top:14px;font-size:15.5px;max-width:46em}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap;position:relative}
.cta-link{margin-top:22px;font-size:14px;position:relative}
.cta-link a{color:rgba(255,255,255,.8);border-bottom:1px solid rgba(255,255,255,.35);padding-bottom:2px}
.cta-link a:hover{color:#fff}

/* footer */
.site-footer{background:var(--sub);border-top:1px solid var(--line);padding:64px 0 28px;margin-top:var(--sp-sec)}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px}
.foot-brand{font-size:18px;font-weight:700;color:var(--ink);position:relative;display:inline-block}
.foot-brand::after{
  content:"";position:absolute;left:0;right:0;bottom:-4px;height:3px;background:var(--lime);border-radius:2px;opacity:.85;
}
.site-footer p{font-size:14px;color:var(--muted);margin-top:16px;line-height:1.85}
.foot-title{font-size:14px;font-weight:600;color:var(--ink);margin:0 0 14px}
.foot-list li{margin-bottom:4px}
.foot-list a{display:inline-block;font-size:14px;color:var(--muted);padding:6px 0;transition:transform .2s ease,color .2s ease}
.foot-list a:hover{color:var(--ink);transform:translateX(3px)}
.foot-bottom{
  margin-top:44px;padding-top:20px;border-top:1px solid var(--line);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13px;color:var(--muted);
}

/* reveal */
.reveal{opacity:0;transform:translateY(16px)}
.reveal.is-in{opacity:1;transform:translateY(0);transition:opacity .48s cubic-bezier(.22,.61,.36,1),transform .48s cubic-bezier(.22,.61,.36,1)}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
  *{transition:none!important;animation:none!important}
}

/* ============ responsive ============ */
@media (max-width:1199px){
  .cmp-row{grid-template-columns:300px 1fr;gap:32px}
}
@media (max-width:991px){
  .nav-left,.nav-right{display:none}
  .header-inner{grid-template-columns:1fr auto;position:relative}
  .brand{justify-self:start}
  .hamburger{display:inline-flex;justify-self:end}
  .compare-overview{grid-template-columns:1fr}
  .cmp-row{grid-template-columns:1fr;gap:24px}
  .point-card{position:static}
  .quick-look{grid-template-columns:1fr;gap:20px}
  .foot-grid{grid-template-columns:1fr 1fr;gap:32px}
  .cta-x{grid-template-columns:1fr;padding:48px 32px}
}
@media (max-width:767px){
  body .container{padding-left:18px;padding-right:18px}
  :root{--sp-sec:56px}
  .page-head{padding:32px 0 36px}
  .ql-points{grid-template-columns:1fr}
  .faq-wrap{padding:4px 18px}
  .sec-head{margin-bottom:26px}
}
@media (max-width:575px){
  .foot-grid{grid-template-columns:1fr}
  .cta-x{padding:40px 22px}
  .cta-actions{flex-direction:column;align-items:stretch}
  .cta-actions .btn-x{width:100%}
  .foot-bottom{flex-direction:column}
}