/* roulang page: index */
:root{
  --ink:#0E2E2B;
  --ink-deep:#08211F;
  --ink-2:#0B2624;
  --mist:#3E7C74;
  --mist-light:#DCE7E4;
  --orange:#E85C33;
  --orange-deep:#D24C26;
  --bg:#F6F7F5;
  --card:#FFFFFF;
  --text:#16211F;
  --text-2:#5A6B68;
  --text-3:#8A9997;
  --line:#E3E8E6;
  --r-card:14px;
  --r-img:12px;
  --r-btn:10px;
  --r-pill:999px;
  --shadow-sm:0 1px 2px rgba(11,33,31,.05);
  --shadow-md:0 1px 2px rgba(11,33,31,.05), 0 12px 32px -12px rgba(11,33,31,.18);
  --shadow-lg:0 2px 4px rgba(11,33,31,.06), 0 24px 52px -18px rgba(11,33,31,.26);
  --ease:cubic-bezier(.22,.61,.36,1);
  --mono:"Inter","SFMono-Regular",Menlo,Consolas,"PingFang SC",monospace;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,-apple-system,"Helvetica Neue",Arial,sans-serif;
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto;}
a{color:var(--ink);text-decoration:none;transition:color .2s var(--ease);}
a:hover{color:var(--orange);}
p{margin:0 0 1em;}
h1,h2,h3,h4{margin:0;color:var(--ink);font-weight:700;letter-spacing:-.01em;}
button,input,select,textarea{font:inherit;color:inherit;}
button{cursor:pointer;border:0;background:none;}
:focus-visible{outline:2px solid var(--mist);outline-offset:3px;border-radius:4px;}
::selection{background:var(--mist-light);color:var(--ink-deep);}

/* Foundation 覆盖 */
.grid-x{margin-left:0;margin-right:0;}
.grid-x>.cell{padding-left:0;padding-right:0;min-width:0;}
.row{margin-left:0;margin-right:0;}
h1,h2,h3{line-height:1.2;}
.foundation-reset{all:unset;}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
@media (max-width:768px){.container{padding:0 16px;}}

/* ============ 导航 ============ */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:80;
  background:rgba(246,247,245,.86);
  backdrop-filter:saturate(150%) blur(10px);
  border-bottom:1px solid transparent;
  transition:height .28s var(--ease), border-color .28s var(--ease), background .28s var(--ease), box-shadow .28s var(--ease);
}
.site-header .nav-inner{
  display:flex;align-items:center;gap:24px;
  height:88px;
  transition:height .28s var(--ease);
}
.site-header.is-stuck{
  background:rgba(250,251,249,.94);
  border-bottom-color:var(--line);
  box-shadow:0 8px 26px -20px rgba(11,33,31,.5);
}
.site-header.is-stuck .nav-inner{height:64px;}

.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand-mark{
  width:34px;height:34px;border-radius:10px;background:var(--ink);
  display:flex;align-items:center;justify-content:center;flex:0 0 auto;
}
.brand-mark svg{width:20px;height:20px;}
.brand-name{font-size:19px;font-weight:800;color:var(--ink);letter-spacing:.01em;white-space:nowrap;}
.brand-sub{display:block;font-family:var(--mono);font-size:10px;letter-spacing:.22em;color:var(--text-3);font-weight:600;margin-top:-4px;}

.nav-search{
  flex:1 1 42%;max-width:480px;
  display:flex;align-items:center;gap:8px;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--r-pill);
  padding:6px 6px 6px 16px;
  box-shadow:var(--shadow-sm);
  transition:border-color .24s var(--ease), box-shadow .24s var(--ease);
}
.nav-search:focus-within{
  border-color:var(--mist);
  box-shadow:0 0 0 4px rgba(62,124,116,.14), var(--shadow-sm);
}
.nav-search svg{width:17px;height:17px;flex:0 0 auto;stroke:var(--text-3);}
.nav-search input{
  flex:1 1 auto;min-width:0;border:0;background:transparent;
  font-size:14px;line-height:1.5;padding:8px 0;outline:none;
}
.nav-search input::placeholder{color:var(--text-3);}
.nav-search .search-divider{width:1px;height:20px;background:var(--line);flex:0 0 auto;}
.nav-search button{
  flex:0 0 auto;font-size:13px;font-weight:700;color:var(--ink);
  padding:8px 12px;border-radius:var(--r-pill);
  transition:background .2s var(--ease), color .2s var(--ease);
}
.nav-search button:hover{background:var(--mist-light);color:var(--ink-deep);}

.nav-links{display:flex;align-items:center;gap:22px;margin-left:auto;flex:0 0 auto;}
.nav-links a{
  position:relative;font-size:14.5px;font-weight:600;color:var(--text-2);
  padding:6px 0;white-space:nowrap;
}
.nav-links a::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:1.5px;
  background:var(--orange);transform:scaleX(0);transform-origin:left;
  transition:transform .24s var(--ease);
}
.nav-links a:hover,.nav-links a:focus-visible{color:var(--ink);}
.nav-links a:hover::after,.nav-links a.is-active::after{transform:scaleX(1);}
.nav-links a.is-active{color:var(--ink);}
.nav-cta{
  background:var(--ink);color:#fff !important;
  padding:11px 20px !important;border-radius:var(--r-pill);
  font-weight:700;
  transition:background .2s var(--ease), transform .2s var(--ease);
}
.nav-cta::after{display:none;}
.nav-cta:hover{background:var(--orange);transform:translateY(-1px);}

.nav-toggle{
  display:none;width:42px;height:42px;border:1px solid var(--line);
  border-radius:12px;background:var(--card);align-items:center;justify-content:center;
  flex:0 0 auto;
}
.nav-toggle span{display:block;width:18px;height:1.6px;background:var(--ink);position:relative;}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:1.6px;background:var(--ink);
  transition:transform .24s var(--ease);
}
.nav-toggle span::before{top:-6px;}
.nav-toggle span::after{top:6px;}

.nav-drawer{
  display:none;border-top:1px solid var(--line);
  background:rgba(250,251,249,.98);
  padding:14px 0 20px;
}
.nav-drawer.is-open{display:block;}
.nav-drawer a{
  display:flex;justify-content:space-between;align-items:center;
  padding:13px 2px;border-bottom:1px solid var(--line);
  font-size:15px;font-weight:600;color:var(--text-2);
}
.nav-drawer a:last-child{border-bottom:0;}
.nav-drawer a.is-active{color:var(--orange);}

@media (max-width:1024px){
  .nav-links{display:none;}
  .nav-toggle{display:flex;}
}
@media (max-width:768px){
  .site-header .nav-inner{
    flex-wrap:wrap;height:auto;padding-top:12px;padding-bottom:12px;gap:12px;
  }
  .site-header.is-stuck .nav-inner{height:auto;padding-top:10px;padding-bottom:10px;}
  .brand{order:1;}
  .nav-toggle{order:2;margin-left:auto;}
  .nav-search{order:3;flex:1 1 100%;max-width:none;}
}

/* ============ 按钮 / 标签 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-size:15px;font-weight:700;line-height:1;
  padding:15px 26px;border-radius:var(--r-btn);
  border:1px solid transparent;
  transition:background .22s var(--ease), color .22s var(--ease), transform .22s var(--ease), border-color .22s var(--ease), box-shadow .22s var(--ease);
  will-change:transform;
}
.btn-primary{background:var(--ink);color:#fff;border-radius:var(--r-pill);}
.btn-primary:hover{background:var(--orange-deep);color:#fff;transform:translateY(-1px);box-shadow:var(--shadow-md);}
.btn-primary .arrow{transition:transform .22s var(--ease);}
.btn-primary:hover .arrow{transform:translateX(3px);}
.btn-outline{background:transparent;color:var(--ink);border-color:var(--line);background:#fff;}
.btn-outline:hover{border-color:var(--mist);color:var(--ink);transform:translateY(-1px);}
.btn-sm{padding:11px 18px;font-size:14px;}

.link-arrow{
  display:inline-flex;align-items:center;gap:6px;
  font-size:14.5px;font-weight:700;color:var(--ink);
  position:relative;padding-bottom:2px;
}
.link-arrow::after{
  content:"";position:absolute;left:0;bottom:0;height:1.5px;width:100%;
  background:var(--orange);transform:scaleX(0);transform-origin:left;
  transition:transform .24s var(--ease);
}
.link-arrow:hover::after{transform:scaleX(1);}
.link-arrow span{transition:transform .22s var(--ease);}
.link-arrow:hover span{transform:translateX(4px);}

.badge{
  display:inline-flex;align-items:center;
  background:var(--mist-light);color:var(--ink);
  font-size:12px;font-weight:700;letter-spacing:.02em;
  padding:4px 11px;border-radius:var(--r-pill);
}
.eyebrow{
  font-family:var(--mono);font-size:12px;font-weight:700;
  letter-spacing:.16em;color:var(--mist);text-transform:uppercase;
  margin:0 0 12px;
}
.num-mono{font-family:var(--mono);font-variant-numeric:tabular-nums;}

.chip{
  display:inline-flex;align-items:center;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-pill);
  font-size:13px;font-weight:600;color:var(--text-2);
  padding:7px 15px;transition:all .22s var(--ease);
}
.chip:hover{border-color:var(--mist);color:var(--ink);transform:translateY(-1px);}

/* ============ 板块 ============ */
.section{padding:104px 0;}
.section-tight{padding:76px 0;}
.section-head{
  display:flex;align-items:flex-end;justify-content:space-between;gap:28px;
  margin-bottom:52px;
}
.section-head h2{font-size:clamp(24px,3vw,38px);}
.section-lead{color:var(--text-2);font-size:15.5px;max-width:560px;margin:12px 0 0;}
@media (max-width:768px){
  .section{padding:60px 0;}
  .section-tight{padding:48px 0;}
  .section-head{flex-direction:column;align-items:flex-start;gap:14px;margin-bottom:32px;}
}

/* ============ Hero ============ */
.hero{
  position:relative;
  padding:150px 0 84px;
  background:linear-gradient(180deg,#FBFCFA 0%,var(--bg) 62%);
  overflow:hidden;
}
.hero::before{
  content:"";position:absolute;right:-140px;top:40px;width:420px;height:420px;
  border-radius:50%;background:radial-gradient(circle,rgba(62,124,116,.14),rgba(62,124,116,0) 68%);
  pointer-events:none;
}
.hero-grid{display:flex;align-items:center;gap:56px;}
.hero-copy{flex:1 1 56%;max-width:620px;}
.hero-visual{flex:1 1 44%;position:relative;}
.hero-tag{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12.5px;font-weight:700;color:var(--mist);
  background:#fff;border:1px solid var(--line);border-radius:var(--r-pill);
  padding:6px 14px;margin-bottom:22px;
}
.hero-tag i{width:6px;height:6px;border-radius:50%;background:var(--orange);display:block;}
.hero h1{
  font-size:clamp(34px,5.2vw,56px);
  font-weight:800;line-height:1.12;letter-spacing:-.01em;
  margin-bottom:22px;
}
.hero h1 em{font-style:normal;color:var(--mist);}
.hero-sub{font-size:17px;color:var(--text-2);max-width:460px;margin-bottom:0;}
.hero-actions{display:flex;align-items:center;gap:22px;margin-top:34px;flex-wrap:wrap;}
.hero-trust{
  display:flex;flex-wrap:wrap;gap:10px 30px;margin-top:40px;
  padding-top:26px;border-top:1px solid var(--line);
}
.hero-trust li{
  list-style:none;display:flex;align-items:center;gap:9px;
  font-size:14px;color:var(--text-2);font-weight:600;
}
.hero-trust li b{font-family:var(--mono);color:var(--orange);font-weight:800;}
.hero-trust ul{margin:0;padding:0;}
.hero-chips{display:flex;flex-wrap:wrap;gap:10px;margin-top:34px;}
.hero-chips .chip-label{font-size:13px;color:var(--text-3);align-self:center;margin-right:2px;}

.hero-photo{
  position:relative;border-radius:20px;overflow:hidden;
  border:1px solid #fff;box-shadow:var(--shadow-lg);
  aspect-ratio:4/3.4;
}
.hero-photo img{width:100%;height:100%;object-fit:cover;}
.hero-photo::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(200deg,rgba(14,46,43,0) 42%,rgba(8,33,31,.42) 100%);
}
.hero-card{
  position:absolute;left:-26px;bottom:34px;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:18px 20px;box-shadow:var(--shadow-md);min-width:212px;
}
.hero-card .hc-label{
  font-family:var(--mono);font-size:11px;letter-spacing:.16em;
  color:var(--text-3);font-weight:700;margin:0 0 8px;
}
.hero-card .hc-num{font-family:var(--mono);font-size:28px;font-weight:800;color:var(--ink);line-height:1;}
.hero-card .hc-text{font-size:13px;color:var(--text-2);margin:8px 0 0;}
@media (max-width:1024px){
  .hero{padding:132px 0 64px;}
  .hero-grid{flex-direction:column;gap:44px;align-items:flex-start;}
  .hero-copy,.hero-visual{flex:1 1 auto;max-width:100%;}
  .hero-visual{width:100%;}
  .hero-card{left:16px;bottom:16px;}
}
@media (max-width:768px){
  .hero{padding:118px 0 48px;}
  .hero-actions{gap:16px;}
  .hero-trust{gap:10px 20px;}
}

/* ============ 卖点三连 ============ */
.points{display:grid;grid-template-columns:repeat(3,1fr);gap:0;border-top:1px solid var(--line);padding-top:12px;}
.point{
  padding:32px 34px 8px 0;
  border-right:1px solid var(--line);
  position:relative;
}
.point:last-child{border-right:0;}
.point:nth-child(1){margin-top:0;}
.point:nth-child(2){margin-top:28px;}
.point:nth-child(3){margin-top:56px;}
.point .p-idx{
  font-family:var(--mono);font-size:13px;font-weight:800;letter-spacing:.14em;
  color:var(--orange);display:block;margin-bottom:16px;
}
.point h3{font-size:20px;margin-bottom:12px;}
.point p{font-size:15px;color:var(--text-2);margin:0;}
@media (max-width:900px){
  .points{grid-template-columns:1fr;border-top:0;padding-top:0;}
  .point{border-right:0;border-top:1px solid var(--line);padding:26px 0 0;margin-top:0 !important;}
  .point + .point{margin-top:26px !important;}
}

/* ============ 分类直达 ============ */
.cat-list{border-top:1px solid var(--line);}
.cat-row{
  display:flex;align-items:center;gap:30px;
  padding:28px 8px;border-bottom:1px solid var(--line);
  transition:background .24s var(--ease), padding .24s var(--ease);
}
.cat-row:hover{background:#fff;padding-left:20px;padding-right:20px;}
.cat-row .cat-idx{
  font-family:var(--mono);font-size:14px;font-weight:800;color:var(--mist);
  flex:0 0 46px;
}
.cat-row .cat-body{flex:1 1 auto;min-width:0;}
.cat-row h3{font-size:19px;margin-bottom:6px;}
.cat-row p{font-size:14.5px;color:var(--text-2);margin:0;}
.cat-row .cat-go{
  flex:0 0 auto;font-size:14px;font-weight:700;color:var(--ink);
  display:inline-flex;align-items:center;gap:6px;
}
.cat-row:hover .cat-go{color:var(--orange);}
.cat-row .cat-go span{transition:transform .22s var(--ease);}
.cat-row:hover .cat-go span{transform:translateX(4px);}
@media (max-width:768px){
  .cat-row{gap:14px;padding:22px 0;}
  .cat-row .cat-idx{flex:0 0 32px;}
  .cat-row .cat-go span{display:none;}
}

/* ============ 场景演示 ============ */
.scene{display:grid;grid-template-columns:minmax(0,300px) 1fr;gap:56px;align-items:start;}
.scene + .scene{margin-top:96px;}
.scene-side{position:sticky;top:112px;}
.scene-side h3{font-size:clamp(22px,2.4vw,30px);margin-bottom:14px;}
.scene-side p{font-size:15px;color:var(--text-2);}
.scene-steps{list-style:none;margin:26px 0 0;padding:0;}
.scene-steps li{
  display:flex;gap:14px;padding:14px 0;border-top:1px solid var(--line);
  font-size:14.5px;color:var(--text-2);
}
.scene-steps li b{font-family:var(--mono);color:var(--orange);font-weight:800;flex:0 0 26px;}
.scene-media{border-radius:16px;overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow-md);background:#fff;}
.scene-media img{width:100%;aspect-ratio:16/9.5;object-fit:cover;}
.scene-note{
  margin-top:18px;font-size:13.5px;color:var(--text-3);
  padding-left:14px;border-left:3px solid var(--mist-light);
}
.scene.reverse{grid-template-columns:1fr minmax(0,300px);}
.scene.reverse .scene-side{order:2;}
.scene.reverse .scene-media{order:1;}
@media (max-width:900px){
  .scene,.scene.reverse{grid-template-columns:1fr;gap:26px;}
  .scene + .scene{margin-top:56px;}
  .scene-side{position:static;}
  .scene.reverse .scene-side,.scene.reverse .scene-media{order:0;}
}

/* ============ 社会认同 ============ */
.proof{background:var(--ink-2);color:#E9EFED;padding:88px 0;}
.proof .eyebrow{color:#8FBDB5;}
.proof h2{color:#fff;font-size:clamp(24px,3vw,36px);}
.metrics{
  display:grid;grid-template-columns:repeat(4,1fr);gap:1px;
  background:rgba(255,255,255,.14);
  border:1px solid rgba(255,255,255,.14);border-radius:var(--r-card);
  overflow:hidden;margin:44px 0 52px;
}
.metric{background:var(--ink-2);padding:26px 24px;}
.metric .m-num{
  font-family:var(--mono);font-size:clamp(26px,3.4vw,40px);font-weight:800;
  color:#fff;line-height:1;letter-spacing:-.02em;
}
.metric .m-num i{font-style:normal;color:var(--orange);}
.metric .m-label{font-size:13.5px;color:#9FB6B1;margin:12px 0 0;}
.quote{
  border-left:3px solid var(--orange);padding-left:26px;
  font-size:clamp(18px,2.1vw,23px);line-height:1.7;color:#EAF1EF;font-weight:600;
  max-width:820px;
}
.quote cite{display:block;margin-top:18px;font-size:13.5px;color:#8FBDB5;font-style:normal;font-weight:600;}
.proof-tags{display:flex;flex-wrap:wrap;gap:12px;margin-top:44px;}
.proof-tags span{
  font-size:13px;font-weight:600;color:#B8CBC7;
  border:1px solid rgba(255,255,255,.18);border-radius:var(--r-pill);
  padding:7px 16px;
}
@media (max-width:900px){.metrics{grid-template-columns:repeat(2,1fr);}}
@media (max-width:520px){
  .metrics{grid-template-columns:1fr;}
  .proof{padding:56px 0;}
}

/* ============ 资讯列表 ============ */
.news-grid{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(0,1fr);gap:32px;}
.news-side{display:grid;gap:24px;align-content:start;}
.news-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;display:block;height:100%;
  transition:transform .26s var(--ease), box-shadow .26s var(--ease);
}
.news-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-md);}
.news-cover{display:block;overflow:hidden;background:var(--mist-light);}
.news-cover img{width:100%;height:100%;object-fit:cover;transition:transform .64s var(--ease);}
.news-card:hover .news-cover img{transform:scale(1.03);}
.news-lead .news-cover img{aspect-ratio:16/9.4;}
.news-mini{display:flex;gap:0;flex-direction:column;}
.news-mini .news-cover img{aspect-ratio:16/8;}
.news-body{padding:24px 24px 26px;}
.news-mini .news-body{padding:18px 20px 20px;}
.news-meta{display:flex;align-items:center;gap:12px;margin-bottom:12px;}
.news-time{font-family:var(--mono);font-size:12.5px;color:var(--text-3);font-weight:600;}
.news-card h3{font-size:19px;line-height:1.45;margin-bottom:10px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-mini h3{font-size:16.5px;}
.news-card:hover h3{color:var(--orange);}
.news-card p{
  font-size:14px;color:var(--text-2);margin:0;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-more{margin-top:14px;font-size:13.5px;font-weight:700;color:var(--mist);}
.empty-state{
  background:#fff;border:1px dashed var(--line);border-radius:var(--r-card);
  padding:52px 30px;text-align:center;
}
.empty-state p{color:var(--text-2);font-size:15px;margin-bottom:20px;}
.empty-state .empty-actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;}
@media (max-width:900px){
  .news-grid{grid-template-columns:1fr;}
}

/* ============ FAQ ============ */
.faq-list{border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-item summary{
  list-style:none;cursor:pointer;
  display:flex;align-items:center;justify-content:space-between;gap:24px;
  padding:26px 4px;font-size:17px;font-weight:700;color:var(--ink);
  transition:color .22s var(--ease);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary:hover{color:var(--orange);}
.faq-item summary::after{
  content:"+";flex:0 0 auto;font-family:var(--mono);font-size:22px;font-weight:400;
  color:var(--mist);line-height:1;
  transition:transform .18s var(--ease), color .18s var(--ease);
}
.faq-item[open] summary::after{transform:rotate(45deg);color:var(--orange);}
.faq-answer{
  padding:0 4px 28px;max-width:820px;
  font-size:15px;color:var(--text-2);
  animation:fadeUp .32s var(--ease) both;
}
@keyframes fadeUp{from{opacity:0;transform:translateY(8px);}to{opacity:1;transform:translateY(0);}}

/* ============ CTA ============ */
.cta-band{
  background:var(--ink-deep);color:#fff;border-radius:22px;
  padding:64px 56px;position:relative;overflow:hidden;
}
.cta-band::before{
  content:"";position:absolute;right:-90px;bottom:-120px;width:340px;height:340px;
  border-radius:50%;background:radial-gradient(circle,rgba(232,92,51,.28),rgba(232,92,51,0) 70%);
}
.cta-band h2{color:#fff;font-size:clamp(26px,3.4vw,42px);max-width:640px;margin-bottom:16px;}
.cta-band p{color:#A9BFBB;font-size:16px;max-width:560px;margin-bottom:30px;}
.cta-band .btn-primary{background:var(--orange);}
.cta-band .btn-primary:hover{background:#fff;color:var(--ink-deep);}
.cta-contact{
  display:flex;flex-wrap:wrap;gap:16px 40px;margin-top:34px;
  padding-top:28px;border-top:1px solid rgba(255,255,255,.14);
}
.cta-contact div{font-size:14px;color:#9FB6B1;}
.cta-contact strong{display:block;color:#fff;font-size:15.5px;margin-top:4px;font-family:var(--mono);}
@media (max-width:768px){.cta-band{padding:40px 24px;border-radius:16px;}}

/* ============ 页脚 ============ */
.site-footer{background:var(--ink-deep);color:#9FB6B1;padding:72px 0 0;margin-top:104px;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:44px;}
.footer-brand .brand-name{color:#fff;}
.footer-brand p{font-size:14px;margin:18px 0 0;max-width:300px;color:#8FA8A3;}
.footer-col h4{
  color:#fff;font-size:12px;letter-spacing:.16em;font-weight:700;
  margin-bottom:18px;text-transform:uppercase;
}
.footer-col a{display:block;font-size:14px;color:#9FB6B1;padding:6px 0;transition:color .2s var(--ease);}
.footer-col a:hover{color:var(--orange);text-decoration:underline;text-underline-offset:3px;}
.footer-note{font-size:13.5px;color:#8FA8A3;line-height:1.9;}
.footer-bottom{
  margin-top:56px;border-top:1px solid rgba(255,255,255,.12);
  padding:22px 0 28px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:#7D948F;
}
.footer-bottom .mono{font-family:var(--mono);}
@media (max-width:900px){.footer-grid{grid-template-columns:1fr 1fr;gap:34px;}}
@media (max-width:520px){
  .site-footer{padding-top:52px;margin-top:64px;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;gap:8px;}
}

/* ============ 底部固定转化条 ============ */
.sticky-bar{
  position:fixed;left:0;right:0;bottom:0;z-index:70;
  background:rgba(250,251,249,.94);
  backdrop-filter:blur(10px) saturate(150%);
  border-top:1px solid var(--line);
  transform:translateY(110%);
  transition:transform .32s var(--ease);
  box-shadow:0 -10px 32px -22px rgba(11,33,31,.55);
}
.sticky-bar.is-visible{transform:translateY(0);}
.sticky-inner{
  display:flex;align-items:center;gap:20px;padding-top:14px;padding-bottom:14px;
}
.sticky-inner p{margin:0;font-size:14.5px;font-weight:600;color:var(--ink);}
.sticky-actions{margin-left:auto;display:flex;gap:12px;align-items:center;}
.sticky-close{
  width:34px;height:34px;border-radius:50%;border:1px solid var(--line);
  color:var(--text-3);font-size:18px;line-height:1;
  display:flex;align-items:center;justify-content:center;flex:0 0 auto;
  transition:all .2s var(--ease);
}
.sticky-close:hover{border-color:var(--mist);color:var(--ink);background:#fff;}
@media (max-width:768px){
  .sticky-inner{flex-wrap:wrap;gap:10px;}
  .sticky-inner p{flex:1 1 100%;font-size:13.5px;}
  .sticky-actions{margin-left:0;flex:1 1 100%;}
  .sticky-actions .btn{flex:1 1 0;}
  .sticky-close{position:absolute;right:12px;top:10px;}
  .sticky-bar .sticky-inner{position:relative;}
}

/* ============ 动效 ============ */
.reveal{opacity:0;transform:translateY(10px);transition:opacity .6s var(--ease), transform .6s var(--ease);}
.reveal.is-in{opacity:1;transform:translateY(0);}
.ai-1{transition-delay:.06s;}
.ai-2{transition-delay:.12s;}
.ai-3{transition-delay:.18s;}
.ai-4{transition-delay:.24s;}
@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:#0E2E2B;
  --ink-deep:#08211F;
  --ink-2:#0B2624;
  --mist:#3E7C74;
  --mist-light:#DCE7E4;
  --orange:#E85C33;
  --orange-deep:#CF4B24;
  --bg:#F6F7F5;
  --card:#FFFFFF;
  --text:#16211F;
  --text-2:#5A6B68;
  --text-3:#8A9997;
  --line:#E3E8E6;
  --input-bg:#F2F5F3;
  --radius-card:14px;
  --radius-img:12px;
  --radius-btn:10px;
  --shadow-sm:0 1px 2px rgba(11,33,31,.05);
  --shadow-md:0 1px 2px rgba(11,33,31,.05),0 12px 32px -12px rgba(11,33,31,.18);
  --shadow-lg:0 2px 4px rgba(11,33,31,.06),0 22px 46px -18px rgba(11,33,31,.26);
  --font-sans:"PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --font-mono:"Inter",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --ease:320ms cubic-bezier(.22,.61,.36,1);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.8;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-style:none;}
a{color:inherit;text-decoration:none;}
button,input{font-family:inherit;font-size:inherit;color:inherit;}
button{cursor:pointer;background:none;border:none;padding:0;}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;}
ul,ol{padding:0;list-style:none;}
::selection{background:var(--mist-light);color:var(--ink);}
:focus-visible{outline:2px solid var(--mist);outline-offset:2px;}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
.mono{font-family:var(--font-mono);letter-spacing:.02em;}
.eyebrow{
  display:inline-block;font-size:12px;letter-spacing:.16em;text-transform:uppercase;
  color:var(--mist);font-weight:600;margin-bottom:14px;
}
.section{padding:96px 0;}
.section-sm{padding:64px 0;}
.section-head{max-width:760px;margin-bottom:48px;}
.section-head h2{
  font-size:clamp(24px,3vw,38px);line-height:1.2;letter-spacing:-.01em;font-weight:700;
}
.section-head p{margin-top:16px;color:var(--text-2);font-size:16px;}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(246,247,245,.92);
  backdrop-filter:saturate(150%) blur(10px);
  border-bottom:1px solid transparent;
  transition:border-color var(--ease),background var(--ease),box-shadow var(--ease);
}
.site-header.is-scrolled{
  background:rgba(246,247,245,.96);
  border-bottom-color:var(--line);
  box-shadow:0 6px 22px -18px rgba(11,33,31,.5);
}
.header-inner{
  display:flex;align-items:center;gap:28px;
  height:88px;transition:height var(--ease);
}
.site-header.is-scrolled .header-inner{height:64px;}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand-mark{
  width:34px;height:34px;border-radius:9px;flex:0 0 auto;
  background:var(--ink);display:flex;align-items:center;justify-content:center;
}
.brand-mark svg{width:20px;height:20px;display:block;}
.brand-text{font-size:19px;font-weight:800;letter-spacing:-.02em;color:var(--ink);white-space:nowrap;}

.nav-search{
  position:relative;flex:1 1 44%;max-width:520px;min-width:200px;
  display:flex;align-items:center;
  background:var(--card);border:1px solid var(--line);border-radius:999px;
  padding:0 6px 0 16px;height:46px;
  transition:border-color var(--ease),box-shadow var(--ease);
}
.site-header.is-scrolled .nav-search{height:42px;}
.nav-search:focus-within{
  border-color:var(--mist);
  box-shadow:0 0 0 3px rgba(62,124,116,.14);
}
.nav-search svg{width:17px;height:17px;flex:0 0 auto;color:var(--text-3);}
.nav-search input{
  flex:1;border:none;background:transparent;height:100%;
  padding:0 10px;font-size:14px;color:var(--text);outline:none;
}
.nav-search input::placeholder{color:var(--text-3);}
.nav-search button{
  flex:0 0 auto;height:34px;padding:0 18px;border-radius:999px;
  background:var(--ink);color:#fff;font-size:13px;font-weight:600;
  transition:background var(--ease),transform var(--ease);
}
.nav-search button:hover{background:var(--ink-2);}
.nav-search button:active{transform:translateY(1px);}

.nav-links{display:flex;align-items:center;gap:22px;flex:0 1 auto;}
.nav-links > a:not(.nav-cta){
  font-size:14px;color:var(--text-2);font-weight:500;white-space:nowrap;
  padding:4px 0;border-bottom:2px solid transparent;
  transition:color var(--ease),border-color var(--ease);
}
.nav-links > a:not(.nav-cta):hover{color:var(--ink);border-bottom-color:var(--mist-light);}
.nav-links > a:not(.nav-cta).is-active,
.nav-links > a:not(.nav-cta)[aria-current]{color:var(--ink);font-weight:700;border-bottom-color:var(--orange);}
.nav-cta{
  display:inline-flex;align-items:center;height:40px;padding:0 20px;border-radius:999px;
  background:var(--orange);color:#fff;font-size:14px;font-weight:600;white-space:nowrap;
  transition:background var(--ease),transform var(--ease),box-shadow var(--ease);
  box-shadow:0 8px 18px -12px rgba(232,92,51,.9);
}
.nav-cta:hover{background:var(--orange-deep);transform:translateY(-1px);}
.nav-toggle{
  display:none;width:42px;height:42px;border-radius:10px;border:1px solid var(--line);
  background:var(--card);align-items:center;justify-content:center;color:var(--ink);
}
.nav-toggle i{font-size:16px;}

/* ============ 面包屑 ============ */
.crumbs{padding:28px 0 0;}
.crumbs ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-3);}
.crumbs li{display:inline-flex;align-items:center;gap:8px;}
.crumbs a{color:var(--text-2);transition:color var(--ease);}
.crumbs a:hover{color:var(--orange);}
.crumbs .sep{color:#C9D3D0;}
.crumbs .current{color:var(--ink);font-weight:600;max-width:420px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}

/* ============ 文章头 ============ */
.article-head{padding:32px 0 0;max-width:860px;}
.article-head .kicker{
  display:inline-flex;align-items:center;gap:8px;
  background:var(--mist-light);color:var(--ink);
  font-size:12px;font-weight:600;letter-spacing:.04em;
  padding:6px 14px;border-radius:999px;margin-bottom:20px;
}
.article-head h1{
  font-size:clamp(28px,4.2vw,50px);line-height:1.16;letter-spacing:-.015em;font-weight:800;
  color:var(--ink);
}
.article-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px 22px;
  margin-top:24px;padding-top:20px;border-top:1px solid var(--line);
  font-size:13px;color:var(--text-2);
}
.article-meta .meta-item{display:inline-flex;align-items:center;gap:8px;}
.article-meta i{color:var(--mist);font-size:13px;}
.article-meta .num{font-family:var(--font-mono);color:var(--ink);font-weight:600;}
.share-btn{
  display:inline-flex;align-items:center;gap:8px;height:34px;padding:0 16px;
  border:1px solid var(--line);border-radius:999px;background:var(--card);
  font-size:13px;color:var(--text-2);transition:all var(--ease);
}
.share-btn:hover{border-color:var(--mist);color:var(--ink);transform:translateY(-1px);box-shadow:var(--shadow-sm);}

/* ============ 正文区 ============ */
.article-layout{
  display:grid;grid-template-columns:minmax(0,1fr) 300px;
  gap:64px;align-items:start;padding:48px 0 0;
}
.article-body{
  max-width:760px;font-size:17px;line-height:1.9;color:var(--text);
  overflow-wrap:break-word;word-break:break-word;
}
.article-body > *:first-child{margin-top:0;}
.article-body h2{
  font-size:clamp(22px,2.4vw,30px);line-height:1.3;font-weight:700;letter-spacing:-.01em;
  margin:56px 0 18px;padding-top:6px;color:var(--ink);
}
.article-body h3{font-size:20px;line-height:1.4;font-weight:700;margin:40px 0 14px;color:var(--ink);}
.article-body h4{font-size:17px;font-weight:700;margin:32px 0 12px;color:var(--ink);}
.article-body p{margin:0 0 22px;}
.article-body strong{font-weight:700;color:var(--ink);}
.article-body a{color:var(--mist);text-decoration:underline;text-underline-offset:3px;transition:color var(--ease);}
.article-body a:hover{color:var(--orange);}
.article-body ul,.article-body ol{margin:0 0 24px;padding-left:24px;}
.article-body ul li{position:relative;margin-bottom:10px;padding-left:4px;list-style:none;}
.article-body ul li::before{
  content:"";position:absolute;left:-16px;top:12px;width:6px;height:6px;
  border-radius:50%;background:var(--orange);
}
.article-body ol{list-style:decimal;}
.article-body ol li{margin-bottom:10px;}
.article-body blockquote{
  margin:32px 0;padding:8px 0 8px 22px;border-left:3px solid var(--mist);
  color:var(--text-2);font-size:16.5px;
}
.article-body img{
  width:100%;border-radius:var(--radius-img);border:1px solid var(--line);
  margin:28px 0;box-shadow:var(--shadow-sm);
}
.article-body figcaption{font-size:13px;color:var(--text-3);text-align:center;margin:-14px 0 28px;}
.article-body table{width:100%;border-collapse:collapse;margin:28px 0;font-size:15px;background:var(--card);}
.article-body th,.article-body td{border-bottom:1px solid var(--line);padding:12px 14px;text-align:left;}
.article-body th{background:#F0F3F1;color:var(--ink);font-weight:600;}
.article-body hr{border:none;border-top:1px solid var(--line);margin:44px 0;}
.article-body code{
  font-family:var(--font-mono);font-size:14px;background:var(--input-bg);
  padding:2px 6px;border-radius:6px;color:var(--ink);
}
.empty-state{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:56px 32px;text-align:center;box-shadow:var(--shadow-sm);
}
.empty-state h2{font-size:24px;margin-bottom:12px;color:var(--ink);}
.empty-state p{color:var(--text-2);margin-bottom:26px;}

/* ============ 侧栏 ============ */
.article-side{position:sticky;top:96px;display:flex;flex-direction:column;gap:20px;}
.toc-card,.side-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:22px 22px 18px;box-shadow:var(--shadow-sm);
}
.toc-card h3,.side-card h3{
  font-size:12px;letter-spacing:.16em;color:var(--text-3);font-weight:700;
  margin-bottom:14px;text-transform:uppercase;
}
.toc-list{display:flex;flex-direction:column;gap:2px;}
.toc-list a{
  display:block;font-size:14px;color:var(--text-2);padding:7px 0 7px 12px;
  border-left:2px solid var(--line);line-height:1.5;
  transition:color var(--ease),border-color var(--ease);
}
.toc-list a:hover{color:var(--ink);border-left-color:var(--mist);}
.toc-list a.is-active{color:var(--ink);font-weight:600;border-left-color:var(--orange);}
.side-card p{font-size:14px;color:var(--text-2);margin-bottom:16px;}
.side-links{display:flex;flex-direction:column;gap:10px;}
.side-links a{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  font-size:14px;color:var(--text);padding:10px 12px;border-radius:10px;
  background:var(--input-bg);transition:background var(--ease),transform var(--ease);
}
.side-links a i{color:var(--mist);font-size:12px;}
.side-links a:hover{background:var(--mist-light);transform:translateX(2px);}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 26px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;border:1px solid transparent;
  transition:background var(--ease),color var(--ease),transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.btn-primary{background:var(--ink);color:#fff;box-shadow:var(--shadow-md);}
.btn-primary:hover{background:var(--ink-2);transform:translateY(-2px);}
.btn-orange{background:var(--orange);color:#fff;border-radius:999px;box-shadow:0 12px 26px -14px rgba(232,92,51,.9);}
.btn-orange:hover{background:var(--orange-deep);transform:translateY(-2px);}
.btn-orange i{transition:transform var(--ease);}
.btn-orange:hover i{transform:translateX(3px);}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--line);background:var(--card);}
.btn-ghost:hover{border-color:var(--mist);transform:translateY(-2px);}
.text-link{
  display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--ink);
  border-bottom:2px solid var(--mist-light);padding-bottom:2px;
  transition:border-color var(--ease),color var(--ease);
}
.text-link:hover{border-bottom-color:var(--orange);color:var(--orange);}
.text-link i{transition:transform var(--ease);}
.text-link:hover i{transform:translateX(3px);}

/* ============ 相关推荐 ============ */
.related{padding:96px 0 0;}
.related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
.post-card{
  display:flex;flex-direction:column;background:var(--card);
  border:1px solid var(--line);border-radius:var(--radius-card);overflow:hidden;
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.post-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg);border-color:#D5DEDB;}
.post-thumb{position:relative;overflow:hidden;aspect-ratio:16/10;background:var(--mist-light);}
.post-thumb img{width:100%;height:100%;object-fit:cover;transition:transform 640ms cubic-bezier(.22,.61,.36,1);}
.post-card:hover .post-thumb img{transform:scale(1.03);}
.badge{
  position:absolute;left:14px;top:14px;background:var(--mist-light);color:var(--ink);
  font-size:12px;font-weight:600;padding:5px 12px;border-radius:999px;
}
.post-body{padding:20px 22px 24px;display:flex;flex-direction:column;gap:10px;flex:1;}
.post-meta{font-size:12px;color:var(--text-3);display:flex;align-items:center;gap:10px;font-family:var(--font-mono);}
.post-body h3{font-size:17px;line-height:1.45;font-weight:700;color:var(--ink);}
.post-body h3 a{background-image:linear-gradient(var(--orange),var(--orange));background-size:0 2px;background-repeat:no-repeat;background-position:0 100%;transition:background-size 240ms ease;}
.post-card:hover .post-body h3 a{background-size:100% 2px;}
.post-body p{font-size:14px;color:var(--text-2);line-height:1.7;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}

/* ============ FAQ ============ */
.faq{padding:96px 0 0;}
.faq-list{border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-item summary{
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:24px 0;cursor:pointer;list-style:none;
  font-size:17px;font-weight:600;color:var(--ink);transition:color var(--ease);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary:hover{color:var(--mist);}
.faq-item summary .plus{
  flex:0 0 auto;width:26px;height:26px;border-radius:50%;border:1px solid var(--line);
  display:flex;align-items:center;justify-content:center;color:var(--mist);
  font-size:13px;transition:transform 180ms ease,background var(--ease),color var(--ease);
}
.faq-item[open] summary .plus{transform:rotate(45deg);background:var(--mist-light);color:var(--ink);}
.faq-answer{padding:0 0 26px;color:var(--text-2);font-size:15.5px;max-width:820px;animation:fadeUp 260ms ease both;}
@keyframes fadeUp{from{opacity:0;transform:translateY(8px);}to{opacity:1;transform:translateY(0);}}

/* ============ 底部 CTA ============ */
.cta-band{
  margin-top:96px;background:var(--ink);color:#fff;position:relative;overflow:hidden;
}
.cta-band::after{
  content:"";position:absolute;right:-120px;top:-120px;width:420px;height:420px;border-radius:50%;
  background:radial-gradient(circle,rgba(232,92,51,.28),transparent 68%);
}
.cta-inner{position:relative;z-index:2;padding:88px 0;max-width:720px;}
.cta-inner h2{font-size:clamp(26px,3.4vw,42px);line-height:1.18;letter-spacing:-.01em;font-weight:800;}
.cta-inner p{margin-top:18px;color:rgba(255,255,255,.74);font-size:16px;max-width:560px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:16px;margin-top:32px;}

/* ============ 页脚 ============ */
.site-footer{background:var(--ink-deep);color:rgba(255,255,255,.72);margin-top:0;}
.footer-grid{
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;
  padding:72px 0 40px;
}
.footer-brand .brand-name{
  display:block;font-size:20px;font-weight:800;color:#fff;letter-spacing:-.02em;margin-bottom:14px;
}
.footer-brand p{font-size:14px;line-height:1.8;max-width:320px;}
.footer-col h4{
  font-size:12px;letter-spacing:.16em;text-transform:uppercase;
  color:rgba(255,255,255,.5);margin-bottom:18px;font-weight:700;
}
.footer-col a,.footer-col p{display:block;font-size:14px;color:rgba(255,255,255,.72);margin-bottom:12px;transition:color var(--ease);}
.footer-col a{width:fit-content;}
.footer-col a:hover{color:var(--orange);text-decoration:underline;text-underline-offset:4px;}
.footer-note{line-height:1.8;font-size:13.5px;}
.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;
  padding:22px 0 28px;border-top:1px solid rgba(255,255,255,.12);
  font-size:13px;color:rgba(255,255,255,.5);
}

/* ============ 底部固定转化条 ============ */
.sticky-bar{
  position:fixed;left:0;right:0;bottom:0;z-index:70;
  background:rgba(246,247,245,.94);backdrop-filter:blur(10px);
  border-top:1px solid var(--line);
  transform:translateY(110%);transition:transform 320ms cubic-bezier(.22,.61,.36,1);
}
.sticky-bar.is-visible{transform:translateY(0);}
.sticky-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:14px 0;}
.sticky-text{font-size:14px;color:var(--text-2);}
.sticky-text strong{color:var(--ink);font-weight:700;}
.sticky-actions{display:flex;align-items:center;gap:12px;}
.sticky-close{
  width:34px;height:34px;border-radius:50%;border:1px solid var(--line);
  display:flex;align-items:center;justify-content:center;color:var(--text-2);
  transition:background var(--ease),color var(--ease);
}
.sticky-close:hover{background:var(--mist-light);color:var(--ink);}

/* ============ 响应式 ============ */
@media (max-width:1280px){
  .header-inner{gap:20px;}
  .nav-links{gap:16px;}
}
@media (max-width:1024px){
  .section{padding:72px 0;}
  .article-layout{grid-template-columns:minmax(0,1fr);gap:48px;}
  .article-side{position:static;order:2;}
  .related{padding:72px 0 0;}
  .related-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .faq{padding:72px 0 0;}
  .cta-band{margin-top:72px;}
}
@media (max-width:768px){
  .container{padding:0 16px;}
  .header-inner{height:auto;padding:12px 0;flex-wrap:wrap;gap:12px;}
  .site-header.is-scrolled .header-inner{height:auto;}
  .brand{order:1;}
  .nav-toggle{display:flex;order:2;margin-left:auto;}
  .nav-search{order:3;flex:1 1 100%;max-width:none;min-width:0;}
  .nav-links{
    order:4;flex:1 1 100%;display:none;flex-wrap:wrap;gap:10px;
    padding:14px 0 6px;border-top:1px solid var(--line);
  }
  .nav-links.is-open{display:flex;}
  .nav-links > a:not(.nav-cta){font-size:14px;padding:8px 12px;background:var(--card);border:1px solid var(--line);border-radius:999px;}
  .nav-links > a:not(.nav-cta)[aria-current]{border-color:var(--orange);}
  .nav-cta{width:100%;justify-content:center;}
  .section{padding:56px 0;}
  .article-head{padding-top:24px;}
  .article-body{font-size:16.5px;}
  .article-body h2{margin-top:40px;}
  .related{padding:56px 0 0;}
  .related-grid{grid-template-columns:minmax(0,1fr);}
  .faq{padding:56px 0 0;}
  .cta-band{margin-top:56px;}
  .cta-inner{padding:64px 0;}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding:56px 0 32px;}
  .sticky-inner{flex-direction:column;align-items:stretch;gap:12px;padding:12px 0;}
  .sticky-actions{display:grid;grid-template-columns:1fr auto;gap:10px;}
  .sticky-actions .btn{width:100%;}
}
@media (max-width:520px){
  .article-meta{gap:8px 14px;}
  .crumbs .current{max-width:200px;}
  .btn{height:46px;padding:0 20px;font-size:14.5px;}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;transition-duration:.001ms !important;scroll-behavior:auto !important;}
}

/* roulang page: category1 */
:root{
  --ink:#0E2E2B;
  --ink-deep:#08211F;
  --ink-2:#0B2624;
  --mist:#3E7C74;
  --mist-light:#DCE7E4;
  --orange:#E85C33;
  --orange-dark:#D14E28;
  --bg:#F6F7F5;
  --card:#FFFFFF;
  --text:#16211F;
  --text-2:#5A6B68;
  --text-3:#8A9997;
  --line:#E3E8E6;
  --r-card:14px;
  --r-img:12px;
  --r-btn:10px;
  --shadow-1:0 1px 2px rgba(11,33,31,.05), 0 12px 32px -12px rgba(11,33,31,.18);
  --shadow-2:0 2px 4px rgba(11,33,31,.06), 0 22px 46px -16px rgba(11,33,31,.28);
  --font:"PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --mono:"Inter",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --ease:cubic-bezier(.4,0,.2,1);
  --header-h:88px;
  --sec-y:112px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.8;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,h5,h6{font-family:var(--font);color:var(--text);margin:0;line-height:1.2;font-weight:700;}
p{margin:0;font-size:16px;line-height:1.8;}
a{color:var(--ink);text-decoration:none;transition:color .22s var(--ease);}
a:hover{color:var(--orange);}
img{max-width:100%;display:block;border-style:none;}
ul,ol{margin:0;padding:0;list-style:none;}
button,input{font-family:inherit;font-size:inherit;}
button{cursor:pointer;border:0;background:none;color:inherit;}
:focus-visible{outline:2px solid var(--mist);outline-offset:2px;}
.container{max-width:1200px;margin:0 auto;padding:0 24px;width:100%;}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums;}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(246,247,245,.94);
  backdrop-filter:saturate(1.4) blur(10px);
  border-bottom:1px solid transparent;
  transition:border-color .24s var(--ease), background .24s var(--ease);
}
.site-header.is-compact{border-bottom-color:var(--line);background:rgba(246,247,245,.97);}
.header-inner{
  display:flex;align-items:center;gap:28px;
  height:var(--header-h);
  transition:height .26s var(--ease);
}
.site-header.is-compact .header-inner{height:64px;}
.logo{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.logo-mark{
  width:34px;height:34px;border-radius:10px;background:var(--ink);
  display:flex;align-items:center;justify-content:center;color:#fff;
}
.site-header.is-compact .logo-mark{width:30px;height:30px;}
.logo-text{font-size:19px;font-weight:800;letter-spacing:.02em;color:var(--ink);white-space:nowrap;}
.nav-search{
  flex:1 1 42%;max-width:520px;position:relative;
  display:flex;align-items:center;
  background:#fff;border:1px solid var(--line);border-radius:999px;
  padding:0 6px 0 16px;height:46px;
  transition:border-color .2s var(--ease), box-shadow .2s var(--ease);
}
.site-header.is-compact .nav-search{height:42px;}
.nav-search:focus-within{border-color:var(--mist);box-shadow:0 0 0 3px rgba(62,124,116,.16);}
.search-icon{flex:0 0 auto;color:var(--text-3);margin-right:10px;}
.nav-search input{
  flex:1 1 auto;border:0;background:transparent;height:100%;
  font-size:14.5px;color:var(--text);outline:none;min-width:0;
}
.nav-search input::placeholder{color:var(--text-3);}
.search-btn{
  flex:0 0 auto;font-size:13.5px;font-weight:600;color:var(--ink);
  padding:0 16px;height:34px;border-radius:999px;background:var(--mist-light);
  transition:background .2s var(--ease), color .2s var(--ease);
}
.search-btn:hover{background:var(--ink);color:#fff;}
.nav-links{display:flex;align-items:center;gap:22px;margin-left:auto;flex:0 0 auto;}
.nav-links a{
  font-size:14.5px;color:var(--text-2);position:relative;white-space:nowrap;padding-bottom:2px;
}
.nav-links a::after{
  content:"";position:absolute;left:0;bottom:0;height:1.5px;width:0;background:var(--orange);
  transition:width .24s var(--ease);
}
.nav-links a:hover{color:var(--ink);}
.nav-links a:hover::after{width:100%;}
.nav-links a.is-active{color:var(--ink);font-weight:600;}
.nav-links a.is-active::after{width:100%;}
.nav-links .nav-cta{
  color:#fff;background:var(--ink);padding:9px 18px;border-radius:999px;font-weight:600;
}
.nav-links .nav-cta::after{display:none;}
.nav-links .nav-cta:hover{background:var(--orange);color:#fff;}
.nav-toggle{
  display:none;width:42px;height:42px;border-radius:10px;border:1px solid var(--line);
  background:#fff;align-items:center;justify-content:center;
}
.nav-toggle span{display:block;width:18px;height:1.6px;background:var(--ink);position:relative;}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:1.6px;background:var(--ink);
}
.nav-toggle span::before{top:-6px;}
.nav-toggle span::after{top:6px;}

/* ============ 面包屑 ============ */
.breadcrumb{padding:20px 0 0;}
.breadcrumb .container{display:flex;align-items:center;gap:8px;font-size:13.5px;color:var(--text-3);flex-wrap:wrap;}
.breadcrumb a{color:var(--text-2);}
.breadcrumb .sep{color:var(--text-3);}
.breadcrumb .current{color:var(--ink);font-weight:600;}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:13px 26px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;letter-spacing:.01em;
  transition:background .2s var(--ease), transform .2s var(--ease), box-shadow .2s var(--ease), color .2s var(--ease);
  border:1px solid transparent;
}
.btn .arrow{transition:transform .24s var(--ease);display:inline-block;}
.btn-primary{background:var(--ink);color:#fff;border-radius:999px;box-shadow:var(--shadow-1);}
.btn-primary:hover{background:var(--ink-2);color:#fff;transform:translateY(-1px);}
.btn-primary:hover .arrow{transform:translateX(3px);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{background:#fff;border-color:var(--line);color:var(--ink);}
.btn-ghost:hover{border-color:var(--ink);color:var(--ink);transform:translateY(-1px);}
.btn-sm{padding:10px 20px;font-size:14px;}
.link-arrow{
  display:inline-flex;align-items:center;gap:8px;font-weight:600;font-size:15px;color:var(--ink);
}
.link-arrow span.u{position:relative;}
.link-arrow span.u::after{
  content:"";position:absolute;left:0;bottom:-2px;height:1.5px;width:0;background:var(--orange);
  transition:width .24s var(--ease);
}
.link-arrow:hover span.u::after{width:100%;}
.link-arrow:hover .arrow{transform:translateX(3px);}
.link-arrow .arrow{transition:transform .24s var(--ease);}

/* ============ Hero ============ */
.page-hero{padding:64px 0 96px;position:relative;}
.hero-grid{align-items:center;}
.eyebrow{
  display:inline-block;font-size:12px;letter-spacing:.16em;text-transform:uppercase;
  color:var(--mist);background:var(--mist-light);padding:6px 12px;border-radius:999px;font-weight:600;
}
.page-hero h1{
  font-size:clamp(34px,5.2vw,58px);letter-spacing:-.01em;line-height:1.12;font-weight:800;
  margin:22px 0 20px;
}
.hero-sub{font-size:17.5px;color:var(--text-2);max-width:520px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:24px;align-items:center;margin:32px 0 26px;}
.hero-points{display:flex;flex-wrap:wrap;gap:10px 22px;font-size:14px;color:var(--text-2);}
.hero-points li{position:relative;padding-left:18px;}
.hero-points li::before{
  content:"";position:absolute;left:0;top:11px;width:8px;height:1.6px;background:var(--orange);
}
.hero-chips{display:flex;flex-wrap:wrap;gap:10px;margin-top:36px;align-items:center;}
.hero-chips .chip-label{font-size:12.5px;color:var(--text-3);letter-spacing:.06em;}
.chip{
  font-size:13.5px;color:var(--text-2);background:#fff;border:1px solid var(--line);
  padding:7px 14px;border-radius:999px;transition:all .2s var(--ease);
}
.chip:hover{border-color:var(--mist);color:var(--ink);transform:translateY(-1px);}
.hero-media{position:relative;}
.hero-media img{
  width:100%;height:430px;object-fit:cover;border-radius:var(--r-img);
  border:1px solid rgba(227,232,230,.9);box-shadow:var(--shadow-1);
}
.info-card{
  position:absolute;left:22px;bottom:-26px;max-width:290px;background:#fff;
  border:1px solid var(--line);border-radius:var(--r-card);padding:18px 20px;box-shadow:var(--shadow-1);
}
.info-card .ic-label{font-size:11.5px;letter-spacing:.16em;color:var(--mist);font-weight:600;}
.info-card .ic-num{font-family:var(--mono);font-size:30px;font-weight:700;color:var(--ink);line-height:1.1;margin:6px 0 4px;}
.info-card .ic-text{font-size:13.5px;color:var(--text-2);line-height:1.7;}

/* ============ 锚点条 ============ */
.anchor-bar{
  position:sticky;top:var(--header-h);z-index:40;
  background:rgba(255,255,255,.95);backdrop-filter:blur(8px);
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  transition:top .26s var(--ease);
}
.site-header.is-compact ~ .main-wrap .anchor-bar{top:64px;}
.anchor-inner{display:flex;gap:8px;overflow-x:auto;scrollbar-width:none;}
.anchor-inner::-webkit-scrollbar{display:none;}
.anchor-link{
  flex:0 0 auto;padding:16px 18px;font-size:14.5px;color:var(--text-2);position:relative;white-space:nowrap;
}
.anchor-link::after{
  content:"";position:absolute;left:18px;right:18px;bottom:-1px;height:2px;background:transparent;
  transition:background .22s var(--ease);
}
.anchor-link:hover{color:var(--ink);}
.anchor-link.is-active{color:var(--ink);font-weight:600;}
.anchor-link.is-active::after{background:var(--orange);}

/* ============ 通用板块 ============ */
.section{padding:var(--sec-y) 0;}
.section-sm{padding:72px 0;}
.sec-head{max-width:720px;margin-bottom:56px;}
.sec-label{font-size:12px;letter-spacing:.16em;color:var(--mist);font-weight:600;text-transform:uppercase;}
.sec-head h2{font-size:clamp(24px,3vw,36px);margin:14px 0 16px;letter-spacing:-.005em;}
.sec-head p{color:var(--text-2);font-size:16.5px;}
.sec-split{display:flex;justify-content:space-between;align-items:flex-end;gap:32px;flex-wrap:wrap;}

/* 图文交错 */
.zigzag{display:grid;grid-template-columns:1fr 1fr;gap:72px;align-items:center;}
.zigzag + .zigzag{margin-top:96px;}
.zigzag .zz-index{
  font-family:var(--mono);font-size:13px;color:var(--orange);font-weight:700;letter-spacing:.08em;
}
.zigzag h3{font-size:clamp(21px,2.2vw,28px);margin:14px 0 16px;}
.zigzag p{color:var(--text-2);margin-bottom:20px;}
.zz-list{margin-top:8px;}
.zz-list li{
  position:relative;padding:12px 0 12px 26px;border-top:1px solid var(--line);
  font-size:14.8px;color:var(--text-2);
}
.zz-list li::before{
  content:"";position:absolute;left:0;top:21px;width:10px;height:1.6px;background:var(--mist);
}
.zz-media{position:relative;}
.zz-media img{
  width:100%;height:360px;object-fit:cover;border-radius:var(--r-img);
  border:1px solid rgba(227,232,230,.9);box-shadow:var(--shadow-1);
}
.zigzag.reverse .zz-media{order:-1;}

/* 场景 */
.scene-wrap{display:grid;grid-template-columns:1.15fr .85fr;gap:64px;align-items:start;}
.scene-list li{
  display:grid;grid-template-columns:52px 1fr;gap:18px;
  padding:26px 0;border-top:1px solid var(--line);
}
.scene-list li:last-child{border-bottom:1px solid var(--line);}
.scene-num{font-family:var(--mono);font-size:13px;color:var(--text-3);padding-top:5px;letter-spacing:.06em;}
.scene-list h4{font-size:18px;margin-bottom:8px;}
.scene-list p{font-size:14.8px;color:var(--text-2);}
.scene-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px;}
.tag{
  font-size:12.5px;color:var(--mist);background:var(--mist-light);
  padding:5px 12px;border-radius:999px;font-weight:600;
}
.scene-aside{
  background:var(--ink);color:#fff;border-radius:var(--r-card);padding:36px 32px;
  position:sticky;top:calc(var(--header-h) + 80px);
}
.scene-aside .sa-label{font-size:11.5px;letter-spacing:.16em;color:var(--mist-light);font-weight:600;}
.scene-aside h3{color:#fff;font-size:22px;margin:14px 0 16px;line-height:1.35;}
.scene-aside p{color:rgba(255,255,255,.72);font-size:14.5px;}
.scene-aside ul{margin:24px 0 28px;}
.scene-aside li{
  font-size:14.2px;color:rgba(255,255,255,.86);padding:10px 0 10px 22px;position:relative;
  border-top:1px solid rgba(255,255,255,.12);
}
.scene-aside li::before{
  content:"";position:absolute;left:0;top:19px;width:9px;height:1.6px;background:var(--orange);
}
.scene-aside .btn-primary{background:var(--orange);width:100%;justify-content:center;}
.scene-aside .btn-primary:hover{background:var(--orange-dark);}

/* 流程 */
.flow-wrap{display:grid;grid-template-columns:.72fr 1.28fr;gap:72px;align-items:start;}
.flow-sticky{position:sticky;top:calc(var(--header-h) + 96px);}
.flow-sticky h2{font-size:clamp(24px,3vw,34px);margin:14px 0 18px;}
.flow-sticky p{color:var(--text-2);font-size:15.5px;}
.flow-step{
  display:grid;grid-template-columns:64px 1fr;gap:22px;padding:30px 0;
  border-top:1px solid var(--line);
}
.flow-step:last-child{border-bottom:1px solid var(--line);}
.flow-step .fs-num{
  font-family:var(--mono);font-size:22px;font-weight:700;color:var(--mist-light);
  -webkit-text-stroke:1px var(--mist);line-height:1;
}
.flow-step h4{font-size:18px;margin-bottom:8px;}
.flow-step p{font-size:14.8px;color:var(--text-2);}
.flow-step .fs-meta{
  display:inline-block;margin-top:12px;font-family:var(--mono);font-size:12.5px;
  color:var(--text-3);border:1px solid var(--line);border-radius:999px;padding:3px 12px;
}

/* 数据条 */
.stats-band{background:var(--bg);border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:64px 0;}
.stats-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:48px;}
.stat .st-num{font-family:var(--mono);font-size:clamp(32px,4vw,46px);font-weight:700;color:var(--ink);line-height:1;letter-spacing:-.02em;}
.stat .st-label{font-size:14px;color:var(--text-2);margin-top:12px;}
.quote-block{margin-top:64px;padding-left:26px;border-left:3px solid var(--orange);max-width:820px;}
.quote-block p{font-size:clamp(18px,2vw,23px);color:var(--ink);font-weight:600;line-height:1.6;}
.quote-block cite{display:block;margin-top:16px;font-style:normal;font-size:13.5px;color:var(--text-3);}

/* FAQ */
.faq-list{border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:24px;
  padding:26px 4px;font-size:17px;font-weight:600;color:var(--text);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-icon{
  flex:0 0 auto;width:26px;height:26px;position:relative;border-radius:50%;
  border:1px solid var(--line);background:#fff;transition:transform .18s var(--ease), border-color .18s var(--ease);
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--ink);transform:translate(-50%,-50%);
}
.faq-icon::before{width:10px;height:1.6px;}
.faq-icon::after{width:1.6px;height:10px;transition:opacity .18s var(--ease);}
.faq-item[open] .faq-icon{transform:rotate(90deg);border-color:var(--mist);}
.faq-item[open] .faq-icon::after{opacity:0;}
.faq-answer{padding:0 4px 28px;max-width:820px;}
.faq-answer p{color:var(--text-2);font-size:15.2px;animation:faqIn .26s var(--ease);}
@keyframes faqIn{from{opacity:0;transform:translateY(8px);}to{opacity:1;transform:none;}}

/* 深色 CTA */
.cta-band{background:var(--ink-deep);padding:104px 0;text-align:center;}
.cta-band h2{color:#fff;font-size:clamp(26px,3.4vw,44px);letter-spacing:-.01em;}
.cta-band p{color:rgba(255,255,255,.68);max-width:600px;margin:22px auto 36px;font-size:16.5px;}
.cta-band .btn-primary{background:var(--orange);}
.cta-band .btn-primary:hover{background:var(--orange-dark);}
.cta-meta{margin-top:26px;font-size:13px;color:rgba(255,255,255,.5);letter-spacing:.04em;}

/* 页脚 */
.site-footer{background:var(--ink-2);color:rgba(255,255,255,.7);padding:80px 0 32px;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.3fr;gap:48px;}
.footer-brand .brand-name{font-size:20px;font-weight:800;color:#fff;letter-spacing:.02em;}
.footer-brand p{margin-top:16px;font-size:14px;color:rgba(255,255,255,.62);max-width:320px;}
.footer-col h4{
  font-size:12px;letter-spacing:.16em;color:rgba(255,255,255,.5);font-weight:600;
  text-transform:uppercase;margin-bottom:18px;
}
.footer-col a{display:block;font-size:14.2px;color:rgba(255,255,255,.76);padding:6px 0;position:relative;width:fit-content;}
.footer-col a::after{
  content:"";position:absolute;left:0;bottom:3px;height:1px;width:0;background:var(--orange);
  transition:width .22s var(--ease);
}
.footer-col a:hover{color:var(--orange);}
.footer-col a:hover::after{width:100%;}
.footer-note{font-size:13.6px;color:rgba(255,255,255,.6);line-height:1.8;}
.footer-bottom{
  margin-top:64px;padding-top:24px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13px;color:rgba(255,255,255,.5);
}

/* 底部固定转化条 */
.sticky-bar{
  position:fixed;left:0;right:0;bottom:0;z-index:70;
  background:rgba(255,255,255,.96);backdrop-filter:blur(8px);
  border-top:1px solid var(--line);
  transform:translateY(110%);opacity:0;pointer-events:none;
  transition:transform .32s var(--ease), opacity .32s var(--ease);
}
.sticky-bar.is-visible{transform:none;opacity:1;pointer-events:auto;}
.sticky-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:14px 24px;max-width:1200px;margin:0 auto;}
.sticky-text{font-size:14.5px;color:var(--text-2);}
.sticky-actions{display:flex;align-items:center;gap:12px;}
.sticky-close{
  width:32px;height:32px;border-radius:50%;border:1px solid var(--line);
  display:flex;align-items:center;justify-content:center;color:var(--text-3);font-size:16px;line-height:1;
  transition:all .2s var(--ease);
}
.sticky-close:hover{border-color:var(--ink);color:var(--ink);}
.only-mobile{display:none;}

/* 入场动效 */
[data-reveal]{opacity:0;transform:translateY(12px);transition:opacity .5s var(--ease), transform .5s var(--ease);}
[data-reveal].is-in{opacity:1;transform:none;}

/* ============ 响应式 ============ */
@media (max-width:1024px){
  :root{--sec-y:80px;}
  .nav-links{gap:16px;}
  .nav-links a{font-size:13.8px;}
  .zigzag{gap:48px;}
  .flow-wrap,.scene-wrap{grid-template-columns:1fr;gap:48px;}
  .scene-aside,.flow-sticky{position:static;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:40px;}
}
@media (max-width:860px){
  .header-inner{flex-wrap:wrap;height:auto;padding:12px 0 14px;gap:12px;}
  .site-header.is-compact .header-inner{height:auto;}
  .logo{order:1;}
  .nav-toggle{display:flex;order:2;margin-left:auto;}
  .nav-search{order:3;flex:1 1 100%;max-width:none;height:44px;}
  .nav-links{
    order:4;flex:1 1 100%;flex-direction:column;align-items:stretch;gap:0;
    display:none;border-top:1px solid var(--line);margin-top:4px;padding-top:8px;
  }
  .nav-links.is-open{display:flex;}
  .nav-links a{padding:12px 4px;font-size:15px;border-bottom:1px solid var(--line);}
  .nav-links a::after{display:none;}
  .nav-links .nav-cta{margin-top:14px;text-align:center;justify-content:center;padding:12px 18px;}
  .anchor-bar{position:static;}
  .zigzag{grid-template-columns:1fr;}
  .zigzag.reverse .zz-media{order:0;}
  .zz-media img{height:280px;}
  .hero-media img{height:320px;}
  .stats-grid{grid-template-columns:1fr;gap:32px;}
  .sticky-bar .sticky-text{display:none;}
  .only-mobile{display:inline-flex;}
  .footer-grid{grid-template-columns:1fr;}
  .cta-band{padding:76px 0;}
}
@media (max-width:520px){
  :root{--sec-y:64px;}
  .container{padding:0 16px;}
  .page-hero{padding:36px 0 72px;}
  .hero-actions{gap:16px;}
  .btn{width:100%;justify-content:center;}
  .hero-actions .link-arrow{width:100%;justify-content:center;}
  .info-card{position:static;margin-top:14px;max-width:none;}
  .info-card{left:auto;bottom:auto;}
  .scene-aside{padding:28px 22px;}
  .footer-bottom{flex-direction:column;gap:8px;}
  .sticky-inner{padding:10px 16px;gap:10px;}
  .sticky-actions{width:100%;}
  .sticky-actions .btn{flex:1 1 0;}
  .sticky-close{flex:0 0 auto;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;scroll-behavior:auto !important;}
  [data-reveal]{opacity:1;transform:none;}
}

/* roulang page: category2 */
:root{
  --ink:#0E2E2B;
  --ink-deep:#08211F;
  --ink-mid:#0B2624;
  --fog:#3E7C74;
  --fog-light:#DCE7E4;
  --accent:#E85C33;
  --accent-deep:#CB4A24;
  --bg:#F6F7F5;
  --bg-soft:#F2F5F3;
  --card:#FFFFFF;
  --text:#16211F;
  --muted:#5A6B68;
  --weak:#8A9997;
  --line:#E3E8E6;
  --r-card:14px;
  --r-img:12px;
  --r-btn:10px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(11,33,31,.05), 0 12px 32px -12px rgba(11,33,31,.18);
  --sh-2:0 2px 4px rgba(11,33,31,.06), 0 20px 44px -16px rgba(11,33,31,.24);
  --ease:cubic-bezier(.22,.61,.36,1);
  --font-cn:"PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --mono:"Inter","SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
body.has-sticky{padding-bottom:76px}
img{display:block;max-width:100%;height:auto;border:0}
a{color:inherit;text-decoration:none;background-color:transparent}
a:hover,a:focus{color:inherit}
button{font-family:inherit;font-size:inherit;line-height:inherit;margin:0}
input{font-family:inherit;font-size:inherit;margin:0}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0;font-family:var(--font-cn);font-weight:400}
:focus-visible{outline:2px solid var(--fog);outline-offset:3px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:104px 0}
.section--tight{padding:80px 0}
.eyebrow{display:inline-block;font-size:12px;letter-spacing:.18em;color:var(--fog);font-weight:700;margin-bottom:16px}
.sec-head{margin-bottom:48px;max-width:760px}
.sec-head h2{margin:0 0 16px;font-size:clamp(24px,3vw,38px);line-height:1.2;font-weight:800;letter-spacing:-.01em;color:var(--ink)}
.sec-head p{margin:0;color:var(--muted);font-size:16px}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:80;background:rgba(246,247,245,.94);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid transparent;transition:background .26s var(--ease),border-color .26s var(--ease),box-shadow .26s var(--ease)}
.site-header.is-scrolled{background:rgba(255,255,255,.92);border-bottom-color:var(--line);box-shadow:0 8px 28px -22px rgba(11,33,31,.65)}
.header-inner{display:flex;align-items:center;gap:26px;height:88px;transition:height .26s var(--ease)}
.site-header.is-scrolled .header-inner{height:64px}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{width:32px;height:32px;border-radius:10px;background:var(--ink);color:#fff;display:grid;place-items:center;flex:0 0 auto;transition:background .24s var(--ease)}
.brand:hover .brand-mark{background:var(--accent)}
.brand-mark svg{width:18px;height:18px}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-name{font-size:19px;font-weight:800;color:var(--ink);letter-spacing:.01em}
.brand-tag{font-size:10.5px;letter-spacing:.2em;color:var(--weak);font-weight:600;text-transform:uppercase}
.search{flex:1 1 44%;max-width:560px;display:flex;align-items:center;gap:8px;height:48px;background:#fff;border:1px solid var(--line);border-radius:var(--r-pill);padding:0 6px 0 18px;transition:border-color .24s var(--ease),box-shadow .24s var(--ease)}
.search:focus-within{border-color:var(--fog);box-shadow:0 0 0 3px rgba(62,124,116,.16)}
.search-ico{width:17px;height:17px;color:var(--weak);flex:0 0 auto}
.search input{flex:1 1 auto;min-width:0;border:0;background:transparent;outline:none;padding:0;font-size:15px;color:var(--text)}
.search input::placeholder{color:var(--weak)}
.search-line{width:1px;height:20px;background:var(--line);flex:0 0 auto}
.search-btn{border:0;background:transparent;color:var(--ink);font-weight:700;font-size:14px;padding:9px 16px;border-radius:var(--r-pill);cursor:pointer;transition:background .22s var(--ease),color .22s var(--ease)}
.search-btn:hover{background:var(--fog-light);color:var(--ink)}
.nav-links{display:flex;align-items:center;gap:22px;flex:0 0 auto}
.nav-links>a{position:relative;font-size:14.5px;font-weight:600;color:var(--muted);padding:6px 0;white-space:nowrap;transition:color .22s var(--ease)}
.nav-links>a::after{content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--accent);transform:scaleX(0);transform-origin:left;transition:transform .24s var(--ease)}
.nav-links>a:hover{color:var(--ink)}
.nav-links>a:hover::after,.nav-links>a.is-active::after{transform:scaleX(1)}
.nav-links>a.is-active{color:var(--ink)}
.nav-links>a.nav-cta{background:var(--ink);color:#fff;padding:11px 22px;border-radius:var(--r-pill);font-weight:700;transition:background .24s var(--ease),transform .24s var(--ease)}
.nav-links>a.nav-cta::after{display:none}
.nav-links>a.nav-cta:hover{background:var(--accent);transform:translateY(-1px);color:#fff}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;font-weight:700;font-size:15px;padding:14px 28px;border-radius:var(--r-pill);border:1px solid transparent;cursor:pointer;transition:background .24s var(--ease),color .24s var(--ease),transform .24s var(--ease),box-shadow .24s var(--ease),border-color .24s var(--ease)}
.btn .arrow{transition:transform .24s var(--ease)}
.btn:hover .arrow{transform:translateX(3px)}
.btn-accent{background:var(--accent);color:#fff}
.btn-accent:hover{background:var(--accent-deep);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.42)}
.btn-ghost:hover{background:rgba(255,255,255,.13);color:#fff;border-color:rgba(255,255,255,.7)}
.btn-solid{background:var(--ink);color:#fff}
.btn-solid:hover{background:var(--accent);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn-link{background:none;border:0;padding:0;color:var(--ink);font-weight:700;position:relative}
.btn-link::after{content:"";position:absolute;left:0;bottom:-3px;height:1px;width:100%;background:var(--ink);transform:scaleX(0);transform-origin:left;transition:transform .24s var(--ease)}
.btn-link:hover::after{transform:scaleX(1)}

/* ---------- hero ---------- */
.page-hero{position:relative;overflow:hidden;background:var(--ink-deep);color:#fff}
.hero-bg{position:absolute;inset:0;background-image:linear-gradient(102deg,rgba(8,33,31,.95) 0%,rgba(8,33,31,.82) 40%,rgba(8,33,31,.42) 100%),url('/assets/images/backpic/back-1.webp');background-size:cover;background-position:center right;}
.hero-glow{position:absolute;width:520px;height:520px;right:-140px;top:-180px;border-radius:50%;background:radial-gradient(circle,rgba(62,124,116,.55),transparent 68%);pointer-events:none}
.page-hero .container{position:relative;z-index:2}
.hero-body{padding:96px 0 72px;max-width:820px}
.crumbs{display:flex;align-items:center;gap:10px;font-size:13px;color:rgba(255,255,255,.7);margin-bottom:26px;flex-wrap:wrap}
.crumbs a{color:rgba(255,255,255,.7);transition:color .2s var(--ease)}
.crumbs a:hover{color:#fff}
.crumbs .sep{color:rgba(255,255,255,.36)}
.crumbs .current{color:#fff;font-weight:600}
.hero-tag{display:inline-flex;align-items:center;gap:8px;font-size:12px;letter-spacing:.18em;font-weight:700;color:#fff;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.2);padding:7px 14px;border-radius:var(--r-pill);margin-bottom:24px}
.hero-tag i{width:6px;height:6px;border-radius:50%;background:var(--accent);display:inline-block}
.hero-title{font-size:clamp(34px,5.2vw,60px);line-height:1.12;letter-spacing:-.01em;font-weight:800;color:#fff;margin-bottom:20px}
.hero-lead{font-size:17px;color:rgba(255,255,255,.84);margin-bottom:34px;max-width:620px}
.hero-actions{display:flex;align-items:center;gap:26px;flex-wrap:wrap;margin-bottom:34px}
.hero-trust{display:flex;flex-wrap:wrap;gap:10px 26px;font-size:13.5px;color:rgba(255,255,255,.72)}
.hero-trust span{display:inline-flex;align-items:center;gap:8px}
.hero-trust span::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--fog);display:inline-block}
.hero-stats{border-top:1px solid rgba(255,255,255,.18);padding:34px 0 44px}
.stat{padding-top:0}
.stat-num{font-family:var(--mono);font-size:clamp(28px,3.4vw,40px);font-weight:700;color:#fff;letter-spacing:-.02em}
.stat-unit{font-size:14px;color:var(--fog-light);font-weight:600;margin-left:4px}
.stat-label{font-size:13.5px;color:rgba(255,255,255,.68);margin-top:6px}

/* ---------- pillars ---------- */
.pillars{display:grid;grid-template-columns:repeat(3,1fr);gap:0;margin-top:8px}
.pillar{padding:0 36px;border-left:1px solid var(--line)}
.pillar:first-child{border-left:0;padding-left:0}
.pillar:nth-child(2){margin-top:26px}
.pillar:nth-child(3){margin-top:52px}
.pillar-idx{font-family:var(--mono);font-size:14px;font-weight:700;color:var(--accent);letter-spacing:.08em;display:block;margin-bottom:16px}
.pillar h3{font-size:21px;font-weight:800;color:var(--ink);margin-bottom:12px;line-height:1.35}
.pillar p{color:var(--muted);font-size:15.5px}

/* ---------- wide figure ---------- */
.wide-figure{margin:0;position:relative;background:var(--ink-mid)}
.wide-figure img{width:100%;height:440px;object-fit:cover;opacity:.92}
.wide-figure figcaption{position:absolute;left:0;right:0;bottom:0;padding:26px 0;background:linear-gradient(to top,rgba(8,33,31,.88),rgba(8,33,31,0));color:rgba(255,255,255,.88);font-size:14.5px}
.wide-figure figcaption .container{display:flex;align-items:center;gap:14px}
.wide-figure .fig-dot{width:8px;height:8px;border-radius:50%;background:var(--accent);flex:0 0 auto}

/* ---------- numbered list ---------- */
.numbered{margin-top:8px;border-top:1px solid var(--line)}
.numbered>li{display:flex;gap:32px;padding:36px 12px;border-bottom:1px solid var(--line);transition:background .26s var(--ease),transform .26s var(--ease)}
.numbered>li:hover{background:#fff;transform:translateX(4px)}
.numbered .idx{font-family:var(--mono);font-size:19px;font-weight:700;color:var(--accent);flex:0 0 58px;line-height:1.5;letter-spacing:.02em}
.numbered h3{font-size:19px;font-weight:800;color:var(--ink);margin-bottom:10px;line-height:1.4}
.numbered p{color:var(--muted);font-size:15.5px;max-width:760px;margin-bottom:14px}
.tag-row{display:flex;flex-wrap:wrap;gap:8px}
.tag-row li{font-size:12px;letter-spacing:.05em;font-weight:600;color:var(--ink);background:var(--fog-light);border-radius:var(--r-pill);padding:5px 12px}

/* ---------- scenes ---------- */
.scene{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center;padding:52px 0;border-bottom:1px solid var(--line)}
.scene:last-child{border-bottom:0}
.scene.reverse .scene-media{order:2}
.scene-media{overflow:hidden;border-radius:var(--r-img);border:1px solid var(--line);box-shadow:var(--sh-1)}
.scene-media img{width:100%;height:320px;object-fit:cover;transition:transform .64s var(--ease)}
.scene:hover .scene-media img{transform:scale(1.03)}
.scene-idx{font-family:var(--mono);font-size:13px;font-weight:700;letter-spacing:.14em;color:var(--fog);display:block;margin-bottom:14px}
.scene-body h3{font-size:clamp(20px,2.2vw,26px);font-weight:800;color:var(--ink);margin-bottom:14px;line-height:1.35}
.scene-body p{color:var(--muted);font-size:15.5px;margin-bottom:18px}
.check-list li{position:relative;padding-left:22px;font-size:15px;color:var(--text);margin-bottom:8px}
.check-list li::before{content:"";position:absolute;left:0;top:11px;width:10px;height:1.5px;background:var(--accent)}

/* ---------- metrics ---------- */
.metrics{background:var(--ink-deep);border-radius:18px;padding:56px 48px;color:#fff;position:relative;overflow:hidden}
.metrics::after{content:"";position:absolute;width:420px;height:420px;right:-160px;bottom:-220px;border-radius:50%;background:radial-gradient(circle,rgba(62,124,116,.5),transparent 68%)}
.metrics-grid{position:relative;z-index:2;display:grid;grid-template-columns:repeat(4,1fr);gap:32px;padding-bottom:40px;border-bottom:1px solid rgba(255,255,255,.16)}
.metric-num{font-family:var(--mono);font-size:clamp(28px,3.6vw,44px);font-weight:700;color:#fff;letter-spacing:-.02em}
.metric-unit{font-size:14px;color:var(--fog-light);font-weight:600;margin-left:4px}
.metric-label{font-size:13.5px;color:rgba(255,255,255,.66);margin-top:8px}
.metrics-quote{position:relative;z-index:2;padding-top:36px;font-size:clamp(18px,2.2vw,24px);font-weight:700;line-height:1.6;max-width:760px;color:#fff}
.metrics-quote span{display:block;margin-top:18px;font-size:14px;font-weight:400;color:rgba(255,255,255,.66)}

/* ---------- faq ---------- */
.faq{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:24px;background:none;border:0;text-align:left;padding:26px 4px;font-size:18px;font-weight:700;color:var(--ink);cursor:pointer;transition:color .22s var(--ease)}
.faq-q:hover{color:var(--fog)}
.faq-icon{position:relative;width:22px;height:22px;flex:0 0 auto}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;background:var(--accent);border-radius:2px;transition:transform .22s var(--ease),opacity .22s var(--ease)}
.faq-icon::before{left:0;top:10px;width:22px;height:2px}
.faq-icon::after{left:10px;top:0;width:2px;height:22px}
.faq-item.is-open .faq-icon::after{transform:rotate(90deg);opacity:0}
.faq-a{max-height:0;overflow:hidden;opacity:0;transition:max-height .32s var(--ease),opacity .28s var(--ease),transform .32s var(--ease);transform:translateY(8px)}
.faq-item.is-open .faq-a{max-height:360px;opacity:1;transform:translateY(0)}
.faq-a p{padding:0 4px 26px;color:var(--muted);font-size:15.5px;max-width:880px}

/* ---------- cta ---------- */
.cta-band{position:relative;overflow:hidden;background:var(--ink);color:#fff;padding:96px 0}
.cta-band-bg{position:absolute;inset:0;background-image:linear-gradient(100deg,rgba(8,33,31,.96) 0%,rgba(8,33,31,.86) 48%,rgba(11,38,36,.68) 100%),url('/assets/images/backpic/back-3.webp');background-size:cover;background-position:center;}
.cta-band .container{position:relative;z-index:2}
.cta-band h2{font-size:clamp(26px,3.6vw,44px);font-weight:800;line-height:1.2;letter-spacing:-.01em;margin-bottom:18px;max-width:700px}
.cta-band p{color:rgba(255,255,255,.78);font-size:16px;max-width:620px;margin-bottom:34px}
.cta-form{display:flex;flex-wrap:wrap;gap:12px;max-width:760px}
.cta-form input{flex:1 1 240px;min-width:0;height:52px;border-radius:var(--r-pill);border:1px solid rgba(255,255,255,.24);background:rgba(255,255,255,.08);color:#fff;padding:0 22px;outline:none;transition:border-color .24s var(--ease),box-shadow .24s var(--ease),background .24s var(--ease)}
.cta-form input::placeholder{color:rgba(255,255,255,.58)}
.cta-form input:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(232,92,51,.26);background:rgba(255,255,255,.12)}
.form-hint{margin-top:16px;font-size:13.5px;color:rgba(255,255,255,.62)}
.form-msg{margin-top:14px;font-size:14px;color:var(--fog-light);display:none}
.form-msg.is-on{display:block}

/* ---------- footer ---------- */
.site-footer{background:var(--ink-deep);color:rgba(255,255,255,.72);padding:72px 0 28px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:44px;padding-bottom:44px;border-bottom:1px solid rgba(255,255,255,.14)}
.footer-brand .brand-name{display:block;font-size:20px;font-weight:800;color:#fff;margin-bottom:14px}
.footer-brand p{font-size:14.5px;color:rgba(255,255,255,.66);max-width:320px}
.footer-col h4{font-size:12px;letter-spacing:.16em;font-weight:700;color:rgba(255,255,255,.9);margin-bottom:18px}
.footer-col a{display:block;font-size:14.5px;color:rgba(255,255,255,.68);margin-bottom:10px;transition:color .22s var(--ease),transform .22s var(--ease)}
.footer-col a:hover{color:var(--accent);transform:translateX(2px)}
.footer-note{font-size:14.5px;color:rgba(255,255,255,.62)}
.footer-bottom{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;padding-top:24px;font-size:13px;color:rgba(255,255,255,.5)}

/* ---------- sticky cta ---------- */
.sticky-cta{position:fixed;left:0;right:0;bottom:0;z-index:90;background:rgba(255,255,255,.95);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-top:1px solid var(--line);transform:translateY(110%);transition:transform .32s var(--ease);visibility:hidden}
.sticky-cta.is-visible{transform:translateY(0);visibility:visible}
.sticky-inner{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:12px 0}
.sticky-text{font-size:14.5px;font-weight:600;color:var(--ink)}
.sticky-actions{display:flex;align-items:center;gap:12px}
.sticky-close{border:1px solid var(--line);background:#fff;width:36px;height:36px;border-radius:50%;color:var(--muted);cursor:pointer;display:grid;place-items:center;font-size:16px;line-height:1;transition:background .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease)}
.sticky-close:hover{background:var(--fog-light);color:var(--ink);border-color:var(--fog)}
.sticky-cta .btn{padding:11px 22px;font-size:14.5px}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(10px);transition:opacity .6s var(--ease),transform .6s var(--ease)}
.reveal.in{opacity:1;transform:none}

/* ---------- responsive ---------- */
@media (max-width:1024px){
  .section{padding:76px 0}
  .section--tight{padding:60px 0}
  .header-inner{flex-wrap:wrap;height:auto;padding:14px 0;gap:14px}
  .site-header.is-scrolled .header-inner{height:auto}
  .search{order:3;flex:1 1 100%;max-width:none}
  .nav-links{margin-left:auto;gap:18px;overflow-x:auto;padding-bottom:2px;scrollbar-width:none}
  .nav-links::-webkit-scrollbar{display:none}
  .pillars{grid-template-columns:1fr;gap:34px}
  .pillar{padding:0;border-left:0;border-top:1px solid var(--line);padding-top:24px}
  .pillar:first-child{border-top:0;padding-top:0}
  .pillar:nth-child(2),.pillar:nth-child(3){margin-top:0}
  .scene{grid-template-columns:1fr;gap:28px;padding:40px 0}
  .scene.reverse .scene-media{order:0}
  .scene-media img{height:260px}
  .metrics{padding:44px 30px}
  .metrics-grid{grid-template-columns:repeat(2,1fr);gap:26px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:34px}
  .wide-figure img{height:320px}
}
@media (max-width:768px){
  body.has-sticky{padding-bottom:118px}
  .container{padding:0 16px}
  .section{padding:56px 0}
  .hero-body{padding:64px 0 48px}
  .hero-actions{margin-bottom:26px}
  .hero-stats{padding:26px 0 34px}
  .wide-figure img{height:220px}
  .wide-figure figcaption{position:static;background:var(--ink-mid);padding:18px 0}
  .numbered>li{flex-direction:column;gap:10px;padding:26px 4px}
  .numbered .idx{flex:none}
  .faq-q{font-size:16.5px;padding:22px 2px}
  .cta-band{padding:64px 0}
  .cta-form{flex-direction:column}
  .cta-form input,.cta-form .btn{width:100%;flex:1 1 auto}
  .sticky-inner{flex-direction:column;align-items:stretch;gap:10px;padding:12px 0 14px}
  .sticky-text{text-align:center;font-size:13.5px}
  .sticky-actions{justify-content:center}
  .sticky-actions .btn{flex:1 1 0}
  .sticky-close{position:absolute;right:16px;top:-46px;background:#fff}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:6px}
}
@media (max-width:520px){
  .brand-name{font-size:17px}
  .brand-tag{font-size:9.5px;letter-spacing:.14em}
  .nav-links>a{font-size:13.5px}
  .nav-links>a.nav-cta{padding:9px 16px}
  .metrics-grid{grid-template-columns:1fr;gap:22px}
  .footer-grid{grid-template-columns:1fr;gap:30px}
  .hero-trust{flex-direction:column;gap:8px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important;scroll-behavior:auto !important}
  .reveal{opacity:1;transform:none}
}

/* roulang page: category3 */
:root{
  --ink:#0E2E2B;
  --ink-deep:#08211F;
  --ink-deeper:#0B2624;
  --mist:#3E7C74;
  --mist-soft:#DCE7E4;
  --sun:#E85C33;
  --bg:#F6F7F5;
  --card:#FFFFFF;
  --text:#16211F;
  --text-2:#5A6B68;
  --text-3:#8A9997;
  --line:#E3E8E6;
  --field:#F2F5F3;
  --r-card:14px;
  --r-img:12px;
  --r-btn:10px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(11,33,31,.05);
  --sh-2:0 1px 2px rgba(11,33,31,.05), 0 12px 32px -12px rgba(11,33,31,.18);
  --sh-3:0 2px 4px rgba(11,33,31,.06), 0 20px 44px -16px rgba(11,33,31,.26);
  --container:1200px;
  --sans:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --mono:"SFMono-Regular","JetBrains Mono",Menlo,Consolas,"Courier New",monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--sans);
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
body.has-sticky{padding-bottom:84px}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button,input,textarea,select{font:inherit;color:inherit}
h1,h2,h3,h4,p,ul,ol{margin:0}
ul,ol{padding:0;list-style:none}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums;letter-spacing:.01em}
:focus-visible{outline:2px solid var(--mist);outline-offset:3px;border-radius:6px}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:70;
  background:rgba(246,247,245,.92);
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid transparent;
  transition:border-color .3s ease,background .3s ease;
}
.site-header.is-scrolled{border-bottom-color:var(--line);background:rgba(246,247,245,.97)}
.header-inner{display:flex;align-items:center;gap:28px;min-height:88px;transition:min-height .3s ease}
.site-header.is-scrolled .header-inner{min-height:64px}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{width:34px;height:34px;border-radius:10px;background:var(--ink);display:grid;place-items:center;color:var(--sun);flex:0 0 auto}
.brand-name{font-size:19px;font-weight:800;letter-spacing:-.01em;color:var(--ink);white-space:nowrap}
.nav-search{
  position:relative;display:flex;align-items:center;gap:8px;
  flex:1 1 42%;max-width:500px;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-pill);
  padding:6px 6px 6px 16px;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.nav-search:focus-within{border-color:var(--mist);box-shadow:0 0 0 3px rgba(62,124,116,.16)}
.nav-search-icon{display:inline-flex;color:var(--text-3);flex:0 0 auto}
.nav-search input{flex:1 1 auto;min-width:0;border:0;background:transparent;outline:none;font-size:14px;color:var(--text)}
.nav-search input::placeholder{color:var(--text-3)}
.nav-search-btn{
  flex:0 0 auto;border:0;cursor:pointer;
  background:var(--ink);color:#fff;border-radius:var(--r-pill);
  padding:9px 18px;font-size:14px;font-weight:600;
  transition:background .2s ease;
}
.nav-search-btn:hover{background:var(--mist)}
.nav-links{display:flex;align-items:center;gap:22px;margin-left:auto;flex:0 0 auto}
.nav-links a{position:relative;font-size:14.5px;color:var(--text-2);padding:4px 0;transition:color .2s ease;white-space:nowrap}
.nav-links a::after{content:"";position:absolute;left:0;bottom:0;width:0;height:1px;background:var(--sun);transition:width .24s ease}
.nav-links a:hover{color:var(--ink)}
.nav-links a:hover::after{width:100%}
.nav-links a.is-active{color:var(--ink);font-weight:700}
.nav-links a.is-active::after{width:100%;background:var(--ink)}
.nav-links .nav-cta{background:var(--ink);color:#fff;border-radius:var(--r-pill);padding:10px 20px;font-weight:600;transition:background .2s ease,transform .2s ease}
.nav-links .nav-cta::after{display:none}
.nav-links .nav-cta:hover{background:var(--sun);color:#fff;transform:translateY(-1px)}
.nav-toggle{
  display:none;flex-direction:column;justify-content:center;gap:5px;
  width:44px;height:44px;border:1px solid var(--line);border-radius:12px;background:#fff;cursor:pointer;
  transition:border-color .2s ease;
}
.nav-toggle:hover{border-color:var(--mist)}
.nav-toggle span{display:block;width:18px;height:2px;margin:0 auto;background:var(--ink);border-radius:2px}
.mobile-panel{border-top:1px solid var(--line);background:#fff}
.mobile-links{display:flex;flex-direction:column;padding:8px 24px 20px}
.mobile-links a{padding:13px 0;border-bottom:1px solid var(--line);font-size:15px;color:var(--text-2)}
.mobile-links a.is-active{color:var(--ink);font-weight:700}
.mobile-links .nav-cta{margin-top:16px;text-align:center;border:0;background:var(--ink);color:#fff;border-radius:var(--r-pill);padding:12px 20px;font-weight:600}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:13px 26px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;line-height:1.2;
  border:1px solid transparent;cursor:pointer;
  transition:background .24s ease,color .24s ease,border-color .24s ease,transform .24s ease,box-shadow .24s ease;
}
.btn .arrow{transition:transform .24s ease}
.btn-primary{background:var(--ink);color:#fff;border-radius:var(--r-pill)}
.btn-primary:hover{background:var(--mist);transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn-primary:hover .arrow{transform:translateX(3px)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--line);border-radius:var(--r-pill)}
.btn-ghost:hover{border-color:var(--mist);color:var(--mist)}
.btn-ghost:hover .arrow{transform:translateX(3px)}

/* ---------- 首屏 ---------- */
.page-hero{padding:60px 0 92px;background:linear-gradient(180deg,#FFFFFF 0%,var(--bg) 100%)}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);gap:56px;align-items:center}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-3);margin-bottom:24px}
.breadcrumb a{color:var(--text-2);transition:color .2s ease}
.breadcrumb a:hover{color:var(--sun);text-decoration:underline;text-underline-offset:3px}
.eyebrow{font-size:12px;font-weight:700;letter-spacing:.16em;color:var(--mist);margin-bottom:16px}
h1{font-size:clamp(34px,5vw,60px);line-height:1.1;letter-spacing:-.01em;font-weight:800;color:var(--ink);margin-bottom:20px}
.hero-lead{font-size:16.5px;color:var(--text-2);max-width:34em;margin-bottom:30px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:30px}
.hero-points{display:flex;flex-wrap:wrap;gap:10px 26px}
.hero-points li{position:relative;padding-left:16px;font-size:13.5px;color:var(--text-2)}
.hero-points li::before{content:"";position:absolute;left:0;top:calc(50% - 3px);width:7px;height:7px;border-radius:50%;background:var(--mist);opacity:.55}
.hero-media{position:relative;border:1px solid var(--line);border-radius:var(--r-img);overflow:hidden;box-shadow:var(--sh-2)}
.hero-media img{width:100%;height:420px;object-fit:cover}
.hero-card{
  position:absolute;left:20px;bottom:20px;
  display:flex;flex-direction:column;gap:2px;
  min-width:176px;padding:14px 18px;
  background:rgba(255,255,255,.96);border:1px solid var(--line);border-radius:12px;box-shadow:var(--sh-1);
}
.hero-card-label{font-size:11px;letter-spacing:.16em;color:var(--text-3)}
.hero-card strong{font-size:26px;line-height:1.1;color:var(--ink)}
.hero-card-unit{font-size:12.5px;color:var(--text-2)}

/* ---------- 板块 ---------- */
.section{padding:104px 0}
.section-alt{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{max-width:740px;margin-bottom:54px}
.section-head h2{font-size:clamp(24px,3vw,38px);line-height:1.2;letter-spacing:-.01em;font-weight:800;color:var(--ink);margin-bottom:16px}
.section-sub{color:var(--text-2);font-size:16px}

/* 维护范围 */
.scope-item{display:flex;gap:18px;padding:26px 0;border-top:1px solid var(--line)}
.scope-item .num{flex:0 0 auto;font-family:var(--mono);font-size:13px;font-weight:700;color:var(--sun);padding-top:4px;letter-spacing:.06em}
.scope-item h3{font-size:18px;color:var(--ink);margin-bottom:8px}
.scope-item p{font-size:14.5px;color:var(--text-2)}

/* 对照表 */
.table-wrap{overflow-x:auto;background:#fff;border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--sh-1)}
.compare-table{width:100%;min-width:660px;border-collapse:collapse}
.compare-table caption{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.compare-table th,.compare-table td{padding:18px 22px;text-align:left;font-size:14.5px;border-bottom:1px solid var(--line);vertical-align:top}
.compare-table thead th{background:var(--mist-soft);color:var(--ink);font-size:13px;font-weight:700;letter-spacing:.08em}
.compare-table tbody th{width:150px;color:var(--ink);font-weight:700;background:#fff}
.compare-table td{color:var(--text-2)}
.compare-table .is-featured{background:#F3F8F6;color:var(--ink);font-weight:600}
.compare-table tbody tr:last-child th,.compare-table tbody tr:last-child td{border-bottom:0}
.compare-table tbody tr{transition:background .2s ease}
.compare-table tbody tr:hover th,.compare-table tbody tr:hover td{background:#FBFCFB}
.compare-table tbody tr:hover .is-featured{background:#EDF5F1}

/* 指标条 */
.stats{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.stat{padding:34px 26px;border-right:1px solid var(--line)}
.stat:last-child{border-right:0}
.stat strong{display:block;font-family:var(--mono);font-size:clamp(28px,3.4vw,40px);line-height:1.1;letter-spacing:-.02em;color:var(--ink)}
.stat span{display:block;margin-top:10px;font-size:13.5px;color:var(--text-2)}

/* 流程 */
.flow-grid{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);gap:56px;align-items:start}
.steps{display:grid;grid-template-columns:repeat(2,1fr);gap:34px 32px}
.step{position:relative;padding-top:26px;border-top:2px solid var(--line)}
.step::before{content:"";position:absolute;top:-2px;left:0;width:38px;height:2px;background:var(--sun)}
.step-num{font-family:var(--mono);font-size:13px;font-weight:700;letter-spacing:.12em;color:var(--mist)}
.step h3{font-size:18px;color:var(--ink);margin:10px 0 10px}
.step p{font-size:14.5px;color:var(--text-2)}
.record-figure{border:1px solid var(--line);border-radius:var(--r-img);overflow:hidden;background:#fff;box-shadow:var(--sh-1)}
.record-figure img{width:100%;height:300px;object-fit:cover}
.record-caption{padding:16px 20px;font-size:13.5px;color:var(--text-2);border-top:1px solid var(--line)}

/* FAQ */
.faq-wrap{max-width:920px}
.faq-accordion{border:0;background:transparent;margin:0}
.faq-accordion .accordion-item{border:0;border-bottom:1px solid var(--line);background:transparent}
.faq-accordion .accordion-item:first-child{border-top:1px solid var(--line)}
.faq-accordion .accordion-title{
  position:relative;border:0;background:transparent;
  padding:24px 52px 24px 0;color:var(--ink);font-size:17px;font-weight:600;line-height:1.6;
}
.faq-accordion .accordion-title:hover{color:var(--mist)}
.faq-accordion .accordion-title::before{
  content:"";position:absolute;right:14px;top:50%;width:12px;height:2px;
  background:var(--mist);transform:translateY(-50%);transition:transform .18s ease;
}
.faq-accordion .accordion-title::after{
  content:"";position:absolute;right:19px;top:50%;width:2px;height:12px;
  background:var(--mist);transform:translateY(-50%);transition:transform .18s ease,opacity .18s ease;
}
.faq-accordion .accordion-item.is-active .accordion-title::after{transform:translateY(-50%) rotate(90deg);opacity:0}
.faq-accordion .accordion-content{border:0;background:transparent;padding:0 52px 26px 0;font-size:15px;color:var(--text-2)}
.faq-accordion .accordion-content p{animation:fadeUp .3s ease both}
@keyframes fadeUp{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}

/* 深色 CTA */
.section-dark{background:var(--ink-deep);color:#E7F0EE;padding:92px 0}
.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:44px;flex-wrap:wrap}
.cta-inner h2{font-size:clamp(26px,3.4vw,42px);line-height:1.18;letter-spacing:-.01em;color:#fff;margin-bottom:14px}
.cta-inner p{color:#A6BEBA;font-size:15.5px;max-width:38em}
.cta-inner .btn-primary{background:var(--sun);color:#fff;padding:16px 34px;font-size:16px}
.cta-inner .btn-primary:hover{background:#CC4A24;box-shadow:0 16px 36px -14px rgba(232,92,51,.7)}
.cta-note{margin-top:18px;font-size:13px;color:#7E9693}

/* 页脚 */
.site-footer{background:var(--ink-deep);color:#B9CDCA;padding:74px 0 28px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.4fr;gap:40px}
.footer-brand .brand-name{display:block;font-size:20px;font-weight:800;color:#fff;margin-bottom:14px}
.footer-brand p{font-size:14px;color:#9DB3B0}
.footer-col h4{font-size:12px;font-weight:700;letter-spacing:.16em;color:#7E9693;margin-bottom:16px}
.footer-col a{display:block;font-size:14px;color:#C6D8D5;padding:6px 0;transition:color .2s ease}
.footer-col a:hover{color:var(--sun);text-decoration:underline;text-underline-offset:4px}
.footer-note{font-size:14px;color:#9DB3B0}
.footer-bottom{
  margin-top:56px;padding-top:22px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;
  font-size:13px;color:#8AA09D;
}

/* 底部固定条 */
.sticky-bar{
  position:fixed;left:0;right:0;bottom:0;z-index:80;
  padding:12px 0;
  background:rgba(255,255,255,.95);
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  border-top:1px solid var(--line);
  transform:translateY(110%);
  transition:transform .32s ease;
}
.sticky-bar.is-visible{transform:translateY(0)}
.sticky-inner{display:flex;align-items:center;justify-content:space-between;gap:20px}
.sticky-text{font-size:14px;color:var(--text-2)}
.sticky-text strong{color:var(--ink)}
.sticky-actions{display:flex;align-items:center;gap:12px}
.sticky-close{
  border:0;background:transparent;color:var(--text-3);
  font-size:22px;line-height:1;padding:4px 10px;border-radius:8px;cursor:pointer;
  transition:color .2s ease,background .2s ease;
}
.sticky-close:hover{color:var(--ink);background:var(--field)}

/* 弹窗 */
.consult-modal{border-radius:var(--r-card);padding:34px;max-width:540px;border:1px solid var(--line);display:none}
.consult-modal h3{font-size:22px;color:var(--ink);margin-bottom:10px}
.consult-modal .modal-sub{font-size:14.5px;color:var(--text-2);margin-bottom:24px}
.consult-form label{display:block;font-size:13px;font-weight:600;color:var(--ink);margin-bottom:8px}
.consult-form input{
  width:100%;background:var(--field);border:1px solid transparent;border-radius:10px;
  padding:13px 16px;font-size:15px;margin-bottom:18px;outline:none;
  transition:border-color .2s ease,background .2s ease;
}
.consult-form input:focus{border-color:var(--mist);background:#fff;box-shadow:0 0 0 3px rgba(62,124,116,.14)}
.consult-form input::placeholder{color:var(--text-3)}
.consult-form .btn{width:100%;justify-content:center}
.form-hint{margin-top:14px;font-size:13px;color:var(--text-3)}
.form-hint.is-ok{color:var(--mist);font-weight:600}
.consult-modal .close-button{
  position:absolute;top:14px;right:16px;
  border:0;background:transparent;color:var(--text-3);font-size:24px;line-height:1;cursor:pointer;
}
.consult-modal .close-button:hover{color:var(--ink)}

/* 入场动效 */
.reveal-up{opacity:0;transform:translateY(12px);transition:opacity .6s ease,transform .6s ease}
.reveal-up.is-in{opacity:1;transform:none}

/* 响应式 */
@media (max-width:1080px){
  .header-inner{gap:18px}
  .nav-links{gap:14px}
  .nav-links a{font-size:13.5px}
  .nav-search{flex:1 1 32%}
  .hero-grid{gap:38px}
}
@media (max-width:900px){
  .nav-links{display:none}
  .nav-toggle{display:flex;order:2;margin-left:auto}
  .brand{order:1}
  .header-inner{flex-wrap:wrap;padding-top:12px;padding-bottom:12px;min-height:0}
  .site-header.is-scrolled .header-inner{min-height:0}
  .nav-search{order:3;flex:0 0 100%;max-width:none;margin-top:12px}
  .page-hero{padding:44px 0 68px}
  .hero-grid{grid-template-columns:1fr}
  .hero-media img{height:320px}
  .section{padding:76px 0}
  .section-head{margin-bottom:40px}
  .flow-grid{grid-template-columns:1fr;gap:40px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .sticky-inner{flex-wrap:wrap}
}
@media (max-width:768px){
  .stats{grid-template-columns:repeat(2,1fr)}
  .stat:nth-child(2n){border-right:0}
  .stat{border-bottom:1px solid var(--line)}
  .stat:nth-child(3),.stat:nth-child(4){border-bottom:0}
  .steps{grid-template-columns:1fr;gap:26px}
  .faq-accordion .accordion-title{font-size:16px;padding-right:44px}
  .faq-accordion .accordion-content{padding-right:44px}
  .sticky-actions{width:100%}
  .sticky-actions .btn{flex:1 1 0;justify-content:center}
}
@media (max-width:520px){
  .container{padding:0 16px}
  .mobile-links{padding:8px 16px 20px}
  .section{padding:56px 0}
  .stats{grid-template-columns:1fr}
  .stat{border-right:0;border-bottom:1px solid var(--line)}
  .stat:last-child{border-bottom:0}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .hero-media img{height:250px}
  .hero-card{left:14px;bottom:14px;padding:12px 14px;min-width:150px}
  .cta-inner{gap:26px}
  .consult-modal{padding:26px 20px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms!important;transition-duration:.001ms!important}
  html{scroll-behavior:auto}
  .reveal-up{opacity:1;transform:none}
}