/* roulang page: index */
:root{
  --c-primary:#0FBFA0;
  --c-primary-hover:#0AA98D;
  --c-primary-press:#079077;
  --c-accent:#FF8A3D;
  --c-ink:#12161B;
  --c-body:#2A2F36;
  --c-muted:#6C737B;
  --c-bg:#F5F6F3;
  --c-surface:#FFFFFF;
  --c-line:#E3E6E1;
  --c-line-dark:rgba(255,255,255,.12);
  --c-error:#E5484D;
  --radius-card:14px;
  --radius-btn:10px;
  --radius-input:10px;
  --shadow-1:0 1px 2px rgba(18,22,27,.04),0 12px 32px -16px rgba(18,22,27,.18);
  --shadow-2:0 20px 40px -20px rgba(18,22,27,.30);
  --container:1200px;
  --font-sans:-apple-system,BlinkMacSystemFont,"PingFang SC","HarmonyOS Sans","Microsoft YaHei","Noto Sans SC","Helvetica Neue",Arial,sans-serif;
  --font-mono:ui-monospace,"JetBrains Mono","SFMono-Regular",Menlo,Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16.5px;
  line-height:1.75;
  color:var(--c-body);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button,input{font:inherit;color:inherit}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{padding:0;list-style:none}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;border-radius:4px}
.mono{font-family:var(--font-mono)}

.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding:0 20px;
}
@media (min-width:1024px){
  .container{padding:0 32px}
}
@media (min-width:1280px){
  :root{--container:1280px}
}

/* ============ 头部 ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:var(--c-surface);
  transition:box-shadow .25s ease;
}
.site-header.is-scrolled{box-shadow:0 8px 24px -18px rgba(18,22,27,.4)}
.brand-row{background:var(--c-surface);border-bottom:1px solid var(--c-line)}
.brand-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  height:64px;
  transition:height .22s ease;
}
.site-header.is-scrolled .brand-inner{height:56px}
.logo{display:flex;align-items:center;gap:10px;min-width:0}
.logo-badge{
  flex:0 0 auto;
  width:32px;height:32px;
  border-radius:9px;
  background:var(--c-ink);
  color:var(--c-primary);
  display:grid;place-items:center;
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:700;
  letter-spacing:.02em;
}
.logo-text{
  font-size:17px;
  font-weight:800;
  letter-spacing:-.01em;
  color:var(--c-ink);
  white-space:nowrap;
}
.brand-actions{display:flex;align-items:center;gap:10px}
.icon-btn{
  width:40px;height:40px;
  display:grid;place-items:center;
  border:1px solid var(--c-line);
  border-radius:var(--radius-btn);
  background:var(--c-surface);
  cursor:pointer;
  transition:border-color .2s ease,color .2s ease,background .2s ease;
}
.icon-btn:hover{border-color:var(--c-primary);color:var(--c-primary)}
.icon-btn svg{width:18px;height:18px}
.search-wrap{position:relative}
.search-box{
  position:absolute;
  right:0;
  top:calc(100% + 10px);
  width:min(320px,78vw);
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:12px;
  padding:10px;
  box-shadow:var(--shadow-1);
  display:none;
}
.search-wrap.is-open .search-box{display:block}
.search-field{
  width:100%;
  height:44px;
  border:1px solid var(--c-line);
  border-radius:var(--radius-input);
  padding:0 14px;
  background:var(--c-bg);
  transition:border-color .2s ease,box-shadow .2s ease;
}
.search-field:focus{
  outline:none;
  border-color:var(--c-primary);
  box-shadow:0 0 0 2px rgba(15,191,160,.22);
  background:var(--c-surface);
}
.search-hint{
  margin-top:8px;
  font-size:13px;
  color:var(--c-muted);
  padding:0 4px;
}
.nav-toggle{display:none}

/* 频道行 */
.nav-row{
  background:var(--c-bg);
  border-bottom:1px solid var(--c-line);
}
.nav-scroll{
  display:flex;
  align-items:center;
  gap:6px;
  height:50px;
  overflow-x:auto;
  scrollbar-width:none;
}
.nav-scroll::-webkit-scrollbar{display:none}
.nav-link{
  position:relative;
  display:inline-flex;
  align-items:center;
  height:50px;
  padding:0 12px;
  font-size:15px;
  color:var(--c-body);
  white-space:nowrap;
  border-bottom:3px solid transparent;
  transition:color .2s ease,border-color .2s ease;
}
.nav-link:hover{color:var(--c-primary)}
.nav-link.is-active{
  color:var(--c-primary);
  font-weight:700;
  border-bottom-color:var(--c-primary);
}

/* 移动抽屉 */
.drawer{
  display:none;
  border-bottom:1px solid var(--c-line);
  background:var(--c-surface);
}
.drawer.is-open{display:block}
.drawer-list{padding:8px 0 18px}
.drawer-list a{
  display:block;
  padding:13px 4px;
  font-size:17px;
  font-weight:600;
  color:var(--c-ink);
  border-bottom:1px solid var(--c-line);
}
.drawer-list a.is-active{color:var(--c-primary)}
.drawer-cta{margin:14px 0 4px}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:46px;
  padding:0 22px;
  border-radius:var(--radius-btn);
  border:1px solid transparent;
  font-size:15px;
  font-weight:700;
  cursor:pointer;
  transition:background .2s ease,color .2s ease,border-color .2s ease,transform .2s ease,box-shadow .2s ease;
}
.btn .arrow{transition:transform .2s ease}
.btn:hover .arrow{transform:translateX(4px)}
.btn-primary{
  background:var(--c-primary);
  color:#062A24;
  box-shadow:0 8px 20px -12px rgba(15,191,160,.9);
}
.btn-primary:hover{background:var(--c-primary-hover)}
.btn-primary:active{background:var(--c-primary-press);transform:translateY(1px)}
.btn-outline{
  background:transparent;
  border-color:var(--c-ink);
  color:var(--c-ink);
}
.btn-outline:hover{background:var(--c-ink);color:#fff}
.btn-outline:active{transform:translateY(1px)}
.btn-onDark{
  background:transparent;
  border-color:rgba(255,255,255,.42);
  color:#fff;
}
.btn-onDark:hover{background:#fff;color:var(--c-ink);border-color:#fff}
.btn-sm{height:40px;padding:0 16px;font-size:14px}
.btn:disabled{opacity:.5;cursor:not-allowed;transform:none}

/* ============ Hero ============ */
.hero{
  position:relative;
  overflow:hidden;
  background:var(--c-ink);
  color:#fff;
}
.hero-bg{
  position:absolute;
  inset:0;
  background-image:url('/assets/images/backpic/back-1.webp');
  background-size:cover;
  background-position:center;
  transform:scale(1.03);
}
.hero-overlay{
  position:absolute;
  inset:0;
  background:linear-gradient(100deg,rgba(18,22,27,.92) 0%,rgba(18,22,27,.78) 48%,rgba(18,22,27,.52) 100%);
}
.hero-inner{
  position:relative;
  z-index:2;
  display:grid;
  grid-template-columns:1.12fr .88fr;
  gap:56px;
  align-items:center;
  padding:96px 0 88px;
  min-height:78vh;
}
.hero-eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.1em;
  color:var(--c-primary);
  border:1px solid rgba(15,191,160,.42);
  border-radius:999px;
  padding:5px 14px;
  background:rgba(15,191,160,.08);
}
.hero-title{
  margin-top:22px;
  font-size:clamp(34px,5.2vw,66px);
  font-weight:800;
  line-height:1.08;
  letter-spacing:-.02em;
  color:#fff;
  max-width:15em;
}
.hero-sub{
  margin-top:20px;
  font-size:17px;
  line-height:1.8;
  color:rgba(255,255,255,.78);
  max-width:640px;
}
.hero-actions{
  display:flex;
  flex-wrap:wrap;
  gap:14px;
  margin-top:32px;
}
.hero-kv{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:20px;
  margin-top:44px;
  padding-top:22px;
  border-top:1px solid var(--c-line-dark);
}
.hero-kv dt{
  font-size:12px;
  letter-spacing:.08em;
  color:rgba(255,255,255,.5);
  font-family:var(--font-mono);
}
.hero-kv dd{
  margin:6px 0 0;
  font-size:14px;
  color:#fff;
  font-family:var(--font-mono);
}
.hero-panel{
  background:rgba(255,255,255,.045);
  border:1px solid rgba(255,255,255,.16);
  border-radius:var(--radius-card);
  padding:22px;
  box-shadow:var(--shadow-2);
}
.panel-head{
  display:flex;
  align-items:center;
  gap:8px;
  padding-bottom:16px;
  border-bottom:1px solid var(--c-line-dark);
}
.panel-dot{width:9px;height:9px;border-radius:50%;background:rgba(255,255,255,.22)}
.panel-dot:first-child{background:var(--c-primary)}
.panel-title{
  margin-left:auto;
  font-size:13px;
  font-family:var(--font-mono);
  color:rgba(255,255,255,.62);
}
.panel-list{margin-top:6px}
.panel-list li{
  display:flex;
  gap:14px;
  padding:14px 0;
  border-bottom:1px dashed var(--c-line-dark);
}
.panel-list li:last-child{border-bottom:0}
.panel-num{
  font-family:var(--font-mono);
  font-size:13px;
  color:var(--c-primary);
  flex:0 0 auto;
  padding-top:2px;
}
.panel-list strong{
  display:block;
  font-size:15px;
  color:#fff;
  font-weight:700;
}
.panel-list p{
  margin-top:3px;
  font-size:13.5px;
  line-height:1.7;
  color:rgba(255,255,255,.66);
}
.panel-foot{
  margin-top:8px;
  padding-top:14px;
  border-top:1px solid var(--c-line-dark);
  font-size:13px;
  color:rgba(255,255,255,.6);
  display:flex;
  align-items:center;
  gap:6px;
}
.cursor{
  display:inline-block;
  width:8px;
  height:15px;
  background:var(--c-primary);
  animation:blink 1.1s steps(1) infinite;
}
@keyframes blink{0%,49%{opacity:1}50%,100%{opacity:0}}

/* ============ 区块 ============ */
.section{padding:96px 0}
.section-alt{background:var(--c-surface);border-top:1px solid var(--c-line);border-bottom:1px solid var(--c-line)}
.eyebrow{
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.14em;
  color:var(--c-primary);
}
.section-head{max-width:780px}
.section-title{
  margin-top:14px;
  font-size:clamp(26px,3.2vw,40px);
  line-height:1.2;
  font-weight:800;
  letter-spacing:-.01em;
  color:var(--c-ink);
}
.section-desc{
  margin-top:16px;
  color:var(--c-muted);
  max-width:740px;
}
.section-body{margin-top:48px}

/* 时间线 */
.timeline{
  margin-top:8px;
  border-left:3px solid var(--c-line);
  padding-left:0;
}
.tl-item{
  position:relative;
  padding:0 0 38px 34px;
}
.tl-item:last-child{padding-bottom:0}
.tl-item::before{
  content:"";
  position:absolute;
  left:-10px;
  top:6px;
  width:15px;
  height:15px;
  border-radius:50%;
  background:var(--c-surface);
  border:3px solid var(--c-primary);
}
.tl-num{
  font-family:var(--font-mono);
  font-size:13px;
  font-weight:700;
  color:var(--c-primary);
  letter-spacing:.06em;
}
.tl-title{
  margin-top:6px;
  font-size:21px;
  font-weight:700;
  color:var(--c-ink);
}
.tl-text{
  margin-top:8px;
  color:var(--c-muted);
  max-width:720px;
}

/* 卡片网格 */
.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
.grid-4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px}

.card{
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--radius-card);
  overflow:hidden;
  transition:transform .28s cubic-bezier(.2,.7,.2,1),border-color .28s ease,box-shadow .28s ease;
}
.card:hover{
  transform:translateY(-4px);
  border-color:rgba(15,191,160,.45);
  box-shadow:var(--shadow-2);
}
.card-cover{
  position:relative;
  aspect-ratio:16/9;
  overflow:hidden;
  background:var(--c-bg);
}
.card-cover img{
  width:100%;
  height:100%;
  object-fit:cover;
  transition:transform .4s cubic-bezier(.2,.7,.2,1);
}
.card:hover .card-cover img{transform:scale(1.04)}
.card-body{padding:22px}
.card-title{
  font-size:19px;
  font-weight:700;
  color:var(--c-ink);
  line-height:1.4;
}
.card-text{
  margin-top:10px;
  font-size:15px;
  color:var(--c-muted);
  line-height:1.7;
}
.card-meta{
  margin-top:14px;
  font-family:var(--font-mono);
  font-size:13px;
  color:var(--c-muted);
  display:flex;
  align-items:center;
  gap:8px;
}
.dot-sep::before{content:"·";margin-right:8px;color:var(--c-line)}

.badge{
  display:inline-flex;
  align-items:center;
  gap:6px;
  height:26px;
  padding:0 12px;
  border-radius:999px;
  font-size:13px;
  font-weight:600;
  border:1px solid var(--c-line);
  background:var(--c-bg);
  color:var(--c-muted);
}
.badge-primary{
  color:#065446;
  border-color:rgba(15,191,160,.4);
  background:rgba(15,191,160,.12);
}
.badge-accent{
  color:#7A3B0B;
  border-color:rgba(255,138,61,.42);
  background:rgba(255,138,61,.14);
}

/* 频道卡 */
.channel-card{display:block}
.channel-num{
  font-family:var(--font-mono);
  font-size:13px;
  font-weight:700;
  color:var(--c-primary);
  letter-spacing:.08em;
}
.channel-more{
  margin-top:16px;
  font-size:14px;
  font-weight:700;
  color:var(--c-primary);
  display:inline-flex;
  align-items:center;
  gap:6px;
}
.channel-card:hover .channel-more .arrow{transform:translateX(4px)}
.channel-more .arrow{transition:transform .2s ease}

/* 资讯列表 */
.news-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.news-card{display:flex;flex-direction:column;height:100%}
.news-card .card-body{display:flex;flex-direction:column;flex:1}
.news-title{
  margin-top:14px;
  font-size:18px;
  font-weight:700;
  color:var(--c-ink);
  line-height:1.45;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.news-sum{
  margin-top:10px;
  font-size:14.5px;
  color:var(--c-muted);
  line-height:1.7;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.news-meta{
  margin-top:auto;
  padding-top:16px;
  font-family:var(--font-mono);
  font-size:13px;
  color:var(--c-muted);
}
.empty-state{
  padding:44px 24px;
  text-align:center;
  border:1px dashed var(--c-line);
  border-radius:var(--radius-card);
  background:var(--c-surface);
  color:var(--c-muted);
}

/* 深色区块 */
.dark-block{
  position:relative;
  background-color:var(--c-ink);
  color:#fff;
  background-image:linear-gradient(rgba(18,22,27,.95),rgba(18,22,27,.95)),url('/assets/images/backpic/back-2.png');
  background-size:cover;
  background-position:center;
}
.dark-block .section-title{color:#fff}
.dark-block .section-desc{color:rgba(255,255,255,.7)}
.safe-list{margin-top:8px;border-top:1px solid var(--c-line-dark)}
.safe-item{
  display:flex;
  gap:18px;
  padding:22px 0;
  border-bottom:1px solid var(--c-line-dark);
}
.safe-num{
  font-family:var(--font-mono);
  font-size:13px;
  color:var(--c-primary);
  padding-top:4px;
  flex:0 0 auto;
}
.safe-item h3{
  font-size:18px;
  font-weight:700;
  color:#fff;
}
.safe-item p{
  margin-top:6px;
  font-size:15px;
  color:rgba(255,255,255,.7);
  max-width:640px;
}
.stat-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;margin-top:8px}
.stat{
  border:1px solid var(--c-line-dark);
  border-radius:var(--radius-card);
  padding:22px;
}
.stat-num{
  font-family:var(--font-mono);
  font-size:clamp(26px,3vw,36px);
  font-weight:700;
  color:var(--c-primary);
  line-height:1.1;
}
.stat-label{
  margin-top:10px;
  font-size:14px;
  color:rgba(255,255,255,.7);
}

/* FAQ */
.faq{margin-top:8px;border-top:1px solid var(--c-line)}
.faq-item{border-bottom:1px solid var(--c-line)}
.faq-item summary{
  list-style:none;
  cursor:pointer;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  padding:22px 0 22px 0;
  font-size:17px;
  font-weight:600;
  color:var(--c-ink);
  transition:color .2s ease;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--c-primary)}
.faq-icon{
  flex:0 0 auto;
  width:26px;height:26px;
  display:grid;place-items:center;
  border:1px solid var(--c-line);
  border-radius:50%;
  font-family:var(--font-mono);
  font-size:15px;
  color:var(--c-muted);
  transition:transform .25s ease,color .25s ease,border-color .25s ease;
}
.faq-item[open] .faq-icon{transform:rotate(45deg);color:var(--c-primary);border-color:rgba(15,191,160,.5)}
.faq-item[open] summary{padding-bottom:14px}
.faq-item[open] .faq-body{border-left:3px solid var(--c-primary);padding-left:18px}
.faq-body{
  margin:0 0 24px;
  color:var(--c-muted);
  max-width:740px;
  transition:border-color .2s ease;
}

/* CTA */
.cta{
  background:var(--c-ink);
  color:#fff;
  border-radius:0;
}
.cta-inner{
  display:grid;
  grid-template-columns:1.3fr .7fr;
  gap:40px;
  align-items:center;
  padding:72px 0;
}
.cta h2{
  font-size:clamp(24px,2.8vw,34px);
  font-weight:800;
  line-height:1.25;
  color:#fff;
}
.cta p{
  margin-top:14px;
  color:rgba(255,255,255,.72);
  max-width:620px;
}
.cta-contact{
  margin-top:22px;
  display:flex;
  flex-wrap:wrap;
  gap:26px;
  font-family:var(--font-mono);
  font-size:14px;
  color:rgba(255,255,255,.7);
}
.cta-actions{display:flex;flex-direction:column;gap:12px}

/* 页脚 */
.site-footer{
  background:var(--c-ink);
  color:#fff;
  border-top:1px solid var(--c-line-dark);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1fr;
  gap:40px;
  padding:72px 0 48px;
}
.footer-brand{display:flex;align-items:center;gap:10px}
.footer-brand .logo-badge{background:rgba(15,191,160,.16);color:var(--c-primary)}
.footer-brand span{
  font-size:16px;
  font-weight:800;
  color:#fff;
}
.footer-note{
  margin-top:18px;
  font-size:14px;
  color:rgba(255,255,255,.62);
  line-height:1.8;
  max-width:340px;
}
.footer-col h3{
  font-size:14px;
  letter-spacing:.06em;
  font-family:var(--font-mono);
  color:rgba(255,255,255,.5);
  margin-bottom:16px;
}
.footer-col li{margin-bottom:12px}
.footer-col a{
  font-size:15px;
  color:rgba(255,255,255,.72);
  transition:color .2s ease,text-decoration-color .2s ease;
  text-decoration:underline;
  text-decoration-color:transparent;
  text-underline-offset:4px;
}
.footer-col a:hover{
  color:var(--c-primary);
  text-decoration-color:var(--c-primary);
}
.footer-bottom{
  border-top:1px solid var(--c-line-dark);
  padding:22px 0 30px;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  font-family:var(--font-mono);
  font-size:13px;
  color:rgba(255,255,255,.55);
}
.to-top{
  display:inline-flex;
  align-items:center;
  gap:8px;
  color:rgba(255,255,255,.7);
  border:1px solid var(--c-line-dark);
  border-radius:999px;
  padding:7px 16px;
  transition:color .2s ease,border-color .2s ease;
}
.to-top:hover{color:var(--c-primary);border-color:rgba(15,191,160,.5)}

/* 动效 */
.reveal{
  opacity:0;
  transform:translateY(12px);
  transition:opacity .32s cubic-bezier(.2,.7,.2,1),transform .32s cubic-bezier(.2,.7,.2,1);
}
.reveal.is-in{opacity:1;transform:none}

/* 响应式 */
@media (max-width:1024px){
  .hero-inner{grid-template-columns:1fr;gap:40px;padding:72px 0 64px;min-height:auto}
  .hero-title{max-width:none}
  .grid-3,.news-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid-4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .cta-inner{grid-template-columns:1fr;gap:28px;padding:60px 0}
  .cta-actions{flex-direction:row;flex-wrap:wrap}
}
@media (max-width:768px){
  body{font-size:16px}
  .nav-row{display:none}
  .nav-toggle{display:grid}
  .brand-cta{display:none}
  .section{padding:60px 0}
  .section-body{margin-top:32px}
  .hero-kv{grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
  .timeline{border-left-width:2px}
  .tl-item{padding-left:26px}
  .tl-item::before{left:-8px;width:13px;height:13px}
  .stat-grid{grid-template-columns:1fr}
  .grid-2{grid-template-columns:1fr}
}
@media (max-width:520px){
  .logo-text{font-size:14.5px;white-space:normal;line-height:1.25;max-width:150px}
  .grid-3,.news-grid,.grid-4{grid-template-columns:1fr}
  .hero-title{font-size:clamp(28px,8vw,34px)}
  .footer-grid{grid-template-columns:1fr;padding:56px 0 36px}
  .cta-actions{flex-direction:column}
  .btn{width:100%}
  .cta-actions .btn,.hero-actions .btn{width:100%}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important}
  .reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
}

/* roulang page: article */
:root{
        --c-primary:#0FBFA0;
        --c-primary-hover:#0AA98D;
        --c-primary-press:#079077;
        --c-accent:#FF8A3D;
        --c-ink:#12161B;
        --c-body:#2A2F36;
        --c-muted:#6C737B;
        --c-bg:#F5F6F3;
        --c-surface:#FFFFFF;
        --c-line:#E3E6E1;
        --c-line-dark:rgba(255,255,255,.12);
        --c-error:#E5484D;
        --radius-card:14px;
        --radius-btn:10px;
        --shadow-sm:0 1px 2px rgba(18,22,27,.04), 0 12px 32px -16px rgba(18,22,27,.18);
        --shadow-lg:0 20px 40px -20px rgba(18,22,27,.28);
        --font-sans:-apple-system,BlinkMacSystemFont,"PingFang SC","HarmonyOS Sans","Microsoft YaHei","Noto Sans SC","Helvetica Neue",Arial,sans-serif;
        --font-mono:ui-monospace,"JetBrains Mono","SFMono-Regular",Menlo,Consolas,monospace;
        --container:1200px;
    }
    *,*::before,*::after{box-sizing:border-box;}
    html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
    body{
        margin:0;
        background:var(--c-bg);
        color:var(--c-body);
        font-family:var(--font-sans);
        font-size:16px;
        line-height:1.75;
        -webkit-font-smoothing:antialiased;
    }
    img{max-width:100%;display:block;}
    a{color:inherit;text-decoration:none;transition:color .2s ease,border-color .2s ease;}
    button,input{font-family:inherit;font-size:inherit;}
    ul,ol{margin:0;padding:0;list-style:none;}
    h1,h2,h3,h4{margin:0;color:var(--c-ink);font-weight:800;letter-spacing:-.01em;}
    p{margin:0;}
    :focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;border-radius:4px;}

    .container{
        width:100%;
        max-width:var(--container);
        margin:0 auto;
        padding:0 20px;
    }
    @media (min-width:1024px){
        .container{padding:0 32px;}
    }
    @media (min-width:1280px){
        :root{--container:1280px;}
    }
    .mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:-.01em;}

    /* ---------- header ---------- */
    .site-header{
        position:sticky;
        top:0;
        z-index:60;
        background:var(--c-surface);
        transition:box-shadow .25s ease;
    }
    .site-header.is-scrolled{box-shadow:0 8px 24px -18px rgba(18,22,27,.35);}
    .brand-row{
        border-bottom:1px solid var(--c-line);
    }
    .brand-inner{
        display:flex;
        align-items:center;
        justify-content:space-between;
        gap:16px;
        height:64px;
        transition:height .25s ease;
    }
    .site-header.is-scrolled .brand-inner{height:56px;}
    .logo{
        display:flex;
        align-items:center;
        gap:10px;
        min-width:0;
    }
    .logo-badge{
        display:inline-flex;
        align-items:center;
        justify-content:center;
        width:38px;
        height:38px;
        flex:0 0 38px;
        border-radius:11px;
        background:var(--c-ink);
        color:#fff;
        font-family:var(--font-mono);
        font-size:14px;
        font-weight:700;
        letter-spacing:.02em;
    }
    .logo-text{
        font-size:17px;
        font-weight:800;
        color:var(--c-ink);
        line-height:1.25;
        letter-spacing:-.01em;
        max-width:9.5em;
    }
    .brand-tools{
        display:flex;
        align-items:center;
        gap:10px;
        flex-shrink:0;
    }
    .search-wrap{
        position:relative;
        display:none;
    }
    @media (min-width:768px){
        .search-wrap{display:block;}
    }
    .search-input{
        width:190px;
        height:40px;
        border:1px solid var(--c-line);
        border-radius:var(--radius-btn);
        background:var(--c-bg);
        padding:0 36px 0 14px;
        color:var(--c-body);
        transition:border-color .2s ease,box-shadow .2s ease,background .2s ease,width .25s ease;
    }
    .search-input::placeholder{color:var(--c-muted);}
    .search-input:focus{
        outline:none;
        background:#fff;
        border-color:var(--c-primary);
        box-shadow:0 0 0 3px rgba(15,191,160,.16);
        width:220px;
    }
    .search-icon{
        position:absolute;
        right:12px;
        top:50%;
        transform:translateY(-50%);
        color:var(--c-muted);
        font-size:14px;
        pointer-events:none;
    }
    .btn{
        display:inline-flex;
        align-items:center;
        justify-content:center;
        gap:8px;
        height:44px;
        padding:0 20px;
        border-radius:var(--radius-btn);
        border:1px solid transparent;
        font-size:15px;
        font-weight:600;
        cursor:pointer;
        transition:background-color .2s ease,color .2s ease,border-color .2s ease,transform .2s ease,box-shadow .2s ease;
    }
    .btn i{transition:transform .2s ease;}
    .btn-primary{background:var(--c-primary);color:#04211b;box-shadow:0 10px 24px -14px rgba(15,191,160,.85);}
    .btn-primary:hover{background:var(--c-primary-hover);color:#03201a;transform:translateY(-2px);}
    .btn-primary:hover i{transform:translateX(4px);}
    .btn-primary:active{background:var(--c-primary-press);transform:translateY(0);}
    .btn-outline{background:transparent;border-color:var(--c-ink);color:var(--c-ink);}
    .btn-outline:hover{background:var(--c-ink);color:#fff;transform:translateY(-2px);}
    .btn-outline:active{transform:translateY(0);}
    .btn-ghost{background:transparent;color:var(--c-primary);padding:0 4px;height:auto;}
    .btn-ghost:hover{color:var(--c-primary-hover);}
    .btn-ghost:hover i{transform:translateX(4px);}
    .btn:disabled{opacity:.5;cursor:not-allowed;transform:none;}
    .btn-sm{height:38px;padding:0 16px;font-size:14px;}
    .burger{
        display:inline-flex;
        align-items:center;
        justify-content:center;
        width:42px;
        height:42px;
        border-radius:var(--radius-btn);
        border:1px solid var(--c-line);
        background:#fff;
        color:var(--c-ink);
        cursor:pointer;
    }
    @media (min-width:1024px){
        .burger{display:none;}
    }

    /* ---------- nav ---------- */
    .nav-row{
        background:var(--c-bg);
        border-bottom:1px solid var(--c-line);
    }
    .nav-scroll{
        display:flex;
        align-items:center;
        gap:28px;
        height:52px;
        overflow-x:auto;
        scrollbar-width:none;
        -ms-overflow-style:none;
    }
    .nav-scroll::-webkit-scrollbar{display:none;}
    .nav-link{
        position:relative;
        flex:0 0 auto;
        font-size:15px;
        font-weight:600;
        color:var(--c-body);
        padding:4px 0;
        white-space:nowrap;
    }
    .nav-link::after{
        content:"";
        position:absolute;
        left:0;right:0;bottom:-15px;
        height:3px;
        border-radius:3px;
        background:transparent;
        transition:background-color .2s ease;
    }
    .nav-link:hover{color:var(--c-primary);}
    .nav-link.is-active{color:var(--c-primary);}
    .nav-link.is-active::after{background:var(--c-primary);}

    /* ---------- mobile drawer ---------- */
    .drawer{
        position:fixed;
        inset:0;
        z-index:90;
        display:none;
    }
    .drawer.is-open{display:block;}
    .drawer-mask{
        position:absolute;
        inset:0;
        background:rgba(18,22,27,.55);
    }
    .drawer-panel{
        position:absolute;
        top:0;right:0;
        width:min(86vw,340px);
        height:100%;
        background:#fff;
        padding:22px 22px 32px;
        overflow-y:auto;
        box-shadow:-20px 0 40px -24px rgba(18,22,27,.4);
        animation:drawerIn .26s cubic-bezier(.2,.7,.2,1);
    }
    @keyframes drawerIn{from{transform:translateX(24px);opacity:0}to{transform:translateX(0);opacity:1}}
    .drawer-head{
        display:flex;
        align-items:center;
        justify-content:space-between;
        margin-bottom:22px;
    }
    .drawer-title{font-size:16px;font-weight:800;color:var(--c-ink);}
    .drawer-close{
        width:38px;height:38px;
        border-radius:var(--radius-btn);
        border:1px solid var(--c-line);
        background:#fff;
        color:var(--c-ink);
        cursor:pointer;
    }
    .drawer-link{
        display:block;
        padding:14px 0;
        font-size:17px;
        font-weight:600;
        color:var(--c-ink);
        border-bottom:1px solid var(--c-line);
    }
    .drawer-link.is-active{color:var(--c-primary);}

    /* ---------- page shell ---------- */
    .page-main{padding:40px 0 0;}
    @media (min-width:1024px){
        .page-main{padding:56px 0 0;}
    }
    .crumbs{
        display:flex;
        flex-wrap:wrap;
        align-items:center;
        gap:8px;
        font-size:13px;
        color:var(--c-muted);
        margin-bottom:22px;
    }
    .crumbs a{color:var(--c-muted);}
    .crumbs a:hover{color:var(--c-primary);}
    .crumbs .sep{color:#C4C9C3;}
    .crumbs .now{color:var(--c-body);}

    .badge{
        display:inline-flex;
        align-items:center;
        gap:6px;
        padding:4px 12px;
        border-radius:999px;
        border:1px solid var(--c-line);
        background:var(--c-bg);
        font-size:13px;
        font-weight:600;
        color:var(--c-body);
        line-height:1.6;
    }
    .badge-primary{
        background:rgba(15,191,160,.12);
        border-color:rgba(15,191,160,.35);
        color:#077a66;
    }
    .badge-accent{
        background:rgba(255,138,61,.14);
        border-color:rgba(255,138,61,.4);
        color:#B95416;
    }

    .article-head{
        max-width:820px;
    }
    .article-title{
        font-size:clamp(28px,4vw,48px);
        line-height:1.18;
        letter-spacing:-.02em;
        margin:16px 0 16px;
    }
    .article-lede{
        font-size:17px;
        color:var(--c-muted);
        max-width:720px;
    }
    .meta-row{
        display:flex;
        flex-wrap:wrap;
        align-items:center;
        gap:10px;
        margin-top:20px;
        font-size:13px;
        color:var(--c-muted);
    }
    .meta-row .dot{color:#C4C9C3;}

    .cover-figure{
        max-width:820px;
        margin:32px 0 0;
        border-radius:var(--radius-card);
        overflow:hidden;
        border:1px solid var(--c-line);
        background:#fff;
        box-shadow:var(--shadow-sm);
    }
    .cover-figure img{
        width:100%;
        aspect-ratio:16/9;
        object-fit:cover;
        transition:transform .4s cubic-bezier(.2,.7,.2,1);
    }
    .cover-figure:hover img{transform:scale(1.02);}
    .cover-figure figcaption{
        padding:10px 16px;
        font-size:13px;
        color:var(--c-muted);
        border-top:1px solid var(--c-line);
        background:var(--c-bg);
    }

    .layout{
        display:grid;
        grid-template-columns:minmax(0,1fr);
        gap:40px;
        padding:44px 0 0;
    }
    @media (min-width:1024px){
        .layout{
            grid-template-columns:minmax(0,1fr) 300px;
            gap:56px;
            padding:56px 0 0;
        }
    }
    .article-body{
        max-width:760px;
        font-size:17px;
        line-height:1.75;
        color:var(--c-body);
    }
    .article-body > * + *{margin-top:20px;}
    .article-body h2{
        font-size:clamp(22px,2.4vw,28px);
        line-height:1.3;
        margin-top:44px;
        padding-left:14px;
        position:relative;
    }
    .article-body h2::before{
        content:"";
        position:absolute;
        left:0;top:.28em;
        width:3px;
        height:1em;
        border-radius:3px;
        background:var(--c-primary);
    }
    .article-body h3{
        font-size:20px;
        line-height:1.4;
        margin-top:32px;
    }
    .article-body p{color:var(--c-body);}
    .article-body a{
        color:var(--c-primary-press);
        text-decoration:underline;
        text-underline-offset:4px;
        text-decoration-thickness:1px;
    }
    .article-body a:hover{color:var(--c-primary-hover);}
    .article-body strong{color:var(--c-ink);font-weight:700;}
    .article-body ul,
    .article-body ol{
        padding-left:0;
        display:flex;
        flex-direction:column;
        gap:10px;
    }
    .article-body ul li,
    .article-body ol li{
        position:relative;
        padding-left:24px;
        color:var(--c-body);
    }
    .article-body ul li::before{
        content:"";
        position:absolute;
        left:6px;
        top:.68em;
        width:7px;height:7px;
        border-radius:50%;
        border:2px solid var(--c-primary);
        background:transparent;
    }
    .article-body ol{counter-reset:li;}
    .article-body ol li{counter-increment:li;}
    .article-body ol li::before{
        content:counter(li,decimal-leading-zero);
        position:absolute;
        left:0;top:0;
        font-family:var(--font-mono);
        font-size:13px;
        font-weight:700;
        color:var(--c-primary-press);
    }
    .article-body blockquote{
        margin:24px 0;
        padding:16px 20px;
        border-left:3px solid var(--c-primary);
        background:rgba(15,191,160,.06);
        border-radius:0 12px 12px 0;
        color:var(--c-ink);
    }
    .article-body blockquote p{margin:0;color:var(--c-ink);}
    .article-body img{
        border-radius:12px;
        border:1px solid var(--c-line);
        margin:8px auto;
    }
    .article-body figure{margin:24px 0;}
    .article-body figcaption{
        margin-top:10px;
        text-align:center;
        font-size:13px;
        color:var(--c-muted);
    }
    .article-body code{
        font-family:var(--font-mono);
        font-size:14px;
        background:var(--c-bg);
        border:1px solid var(--c-line);
        border-radius:6px;
        padding:2px 6px;
        color:var(--c-ink);
    }
    .article-body pre{
        background:var(--c-ink);
        color:#E8ECEA;
        padding:18px 20px;
        border-radius:12px;
        overflow-x:auto;
        font-family:var(--font-mono);
        font-size:14px;
        line-height:1.7;
    }
    .article-body pre code{background:transparent;border:0;color:inherit;padding:0;}
    .article-body table{
        width:100%;
        border-collapse:collapse;
        font-size:15px;
        display:block;
        overflow-x:auto;
        white-space:nowrap;
        border:1px solid var(--c-line);
        border-radius:12px;
    }
    .article-body thead th{
        background:var(--c-bg);
        text-align:left;
        font-weight:700;
        color:var(--c-ink);
    }
    .article-body th,
    .article-body td{
        padding:12px 16px;
        border-bottom:1px solid var(--c-line);
    }
    .article-body hr{
        border:0;
        border-top:1px solid var(--c-line);
        margin:32px 0;
    }

    .empty-state{
        max-width:760px;
        background:#fff;
        border:1px solid var(--c-line);
        border-radius:var(--radius-card);
        padding:40px 28px;
        text-align:center;
        box-shadow:var(--shadow-sm);
    }
    .empty-state .icon{
        width:56px;height:56px;
        margin:0 auto 16px;
        border-radius:16px;
        display:flex;align-items:center;justify-content:center;
        background:rgba(15,191,160,.12);
        color:var(--c-primary-press);
        font-size:22px;
    }
    .empty-state h2{font-size:22px;margin-bottom:10px;}
    .empty-state p{color:var(--c-muted);margin-bottom:22px;}

    .tag-row{
        display:flex;
        flex-wrap:wrap;
        gap:10px;
        margin-top:44px;
    }
    .tag{
        display:inline-flex;
        align-items:center;
        padding:6px 14px;
        border-radius:999px;
        border:1px solid var(--c-line);
        background:#fff;
        font-size:13px;
        color:var(--c-body);
    }
    .tag:hover{border-color:var(--c-primary);color:var(--c-primary-press);}

    .share-row{
        display:flex;
        flex-wrap:wrap;
        align-items:center;
        gap:12px;
        margin-top:28px;
        padding-top:24px;
        border-top:1px solid var(--c-line);
    }
    .share-label{font-size:13px;color:var(--c-muted);}
    .share-btn{
        display:inline-flex;
        align-items:center;
        gap:8px;
        height:38px;
        padding:0 16px;
        border-radius:var(--radius-btn);
        border:1px solid var(--c-line);
        background:#fff;
        font-size:14px;
        font-weight:600;
        color:var(--c-body);
        cursor:pointer;
        transition:border-color .2s ease,color .2s ease,transform .2s ease;
    }
    .share-btn:hover{border-color:var(--c-primary);color:var(--c-primary-press);transform:translateY(-2px);}

    .side-card{
        background:#fff;
        border:1px solid var(--c-line);
        border-radius:var(--radius-card);
        padding:22px;
        box-shadow:var(--shadow-sm);
    }
    .side-card + .side-card{margin-top:20px;}
    .side-card h3{
        font-size:16px;
        margin-bottom:14px;
        display:flex;
        align-items:center;
        gap:8px;
    }
    .side-card h3 i{color:var(--c-primary);font-size:14px;}
    .side-list{display:flex;flex-direction:column;gap:12px;}
    .side-list a{
        display:flex;
        gap:10px;
        font-size:14.5px;
        color:var(--c-body);
        line-height:1.55;
    }
    .side-list a:hover{color:var(--c-primary-press);}
    .side-list .num{
        font-family:var(--font-mono);
        font-size:12px;
        font-weight:700;
        color:var(--c-primary-press);
        padding-top:2px;
    }
    .side-note{
        font-size:13.5px;
        color:var(--c-muted);
        line-height:1.7;
    }
    .side-cta{
        margin-top:16px;
        width:100%;
    }

    .section{
        padding:64px 0 0;
    }
    @media (min-width:1024px){
        .section{padding:96px 0 0;}
    }
    .section-head{
        display:flex;
        align-items:flex-end;
        justify-content:space-between;
        gap:20px;
        flex-wrap:wrap;
        margin-bottom:32px;
    }
    .section-head h2{font-size:clamp(22px,2.8vw,34px);line-height:1.2;}
    .section-head p{font-size:14.5px;color:var(--c-muted);margin-top:8px;max-width:620px;}

    .card-grid{
        display:grid;
        grid-template-columns:1fr;
        gap:20px;
    }
    @media (min-width:640px){
        .card-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
    }
    @media (min-width:1024px){
        .card-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
    }
    .card{
        background:#fff;
        border:1px solid var(--c-line);
        border-radius:var(--radius-card);
        overflow:hidden;
        display:flex;
        flex-direction:column;
        box-shadow:var(--shadow-sm);
        transition:transform .25s cubic-bezier(.2,.7,.2,1),border-color .25s ease,box-shadow .25s ease;
    }
    .card:hover{
        transform:translateY(-4px);
        border-color:rgba(15,191,160,.45);
        box-shadow:var(--shadow-lg);
    }
    .card-media{
        overflow:hidden;
        background:var(--c-bg);
    }
    .card-media img{
        width:100%;
        aspect-ratio:16/9;
        object-fit:cover;
        transition:transform .4s cubic-bezier(.2,.7,.2,1);
    }
    .card:hover .card-media img{transform:scale(1.03);}
    .card-body{
        padding:18px 20px 20px;
        display:flex;
        flex-direction:column;
        gap:10px;
        flex:1;
    }
    .card-title{
        font-size:17.5px;
        line-height:1.5;
        font-weight:700;
        color:var(--c-ink);
        display:-webkit-box;
        -webkit-line-clamp:2;
        -webkit-box-orient:vertical;
        overflow:hidden;
    }
    .card-excerpt{
        font-size:14.5px;
        color:var(--c-muted);
        line-height:1.7;
        display:-webkit-box;
        -webkit-line-clamp:2;
        -webkit-box-orient:vertical;
        overflow:hidden;
    }
    .card-meta{
        margin-top:auto;
        display:flex;
        align-items:center;
        justify-content:space-between;
        gap:12px;
        font-size:13px;
        color:var(--c-muted);
    }

    .cta-band{
        margin-top:64px;
        background:var(--c-ink);
        border-radius:18px;
        padding:32px 24px;
        display:flex;
        flex-direction:column;
        gap:22px;
        align-items:flex-start;
        justify-content:space-between;
        border:1px solid var(--c-line-dark);
    }
    @media (min-width:768px){
        .cta-band{
            flex-direction:row;
            align-items:center;
            padding:38px 40px;
            margin-top:96px;
        }
    }
    .cta-band h2{
        color:#fff;
        font-size:clamp(20px,2.4vw,28px);
        line-height:1.3;
        margin-bottom:8px;
    }
    .cta-band p{
        color:rgba(255,255,255,.7);
        font-size:14.5px;
        max-width:520px;
    }
    .cta-band .mono{color:var(--c-primary);font-size:13.5px;}

    /* ---------- footer ---------- */
    .site-footer{
        margin-top:80px;
        background:var(--c-ink);
        color:rgba(255,255,255,.72);
        padding:56px 0 24px;
    }
    @media (min-width:1024px){
        .site-footer{margin-top:112px;padding:72px 0 28px;}
    }
    .footer-grid{
        display:grid;
        grid-template-columns:1fr;
        gap:32px;
    }
    @media (min-width:640px){
        .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
    }
    @media (min-width:1024px){
        .footer-grid{grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;}
    }
    .footer-brand{
        display:flex;
        align-items:center;
        gap:10px;
        color:#fff;
        font-size:16.5px;
        font-weight:800;
        margin-bottom:14px;
    }
    .footer-brand .logo-badge{background:var(--c-primary);color:#04211b;}
    .footer-note{
        font-size:13.5px;
        line-height:1.8;
        color:rgba(255,255,255,.6);
        max-width:360px;
    }
    .footer-col h3{
        color:#fff;
        font-size:14px;
        font-weight:700;
        margin-bottom:16px;
        letter-spacing:.02em;
    }
    .footer-col ul{display:flex;flex-direction:column;gap:11px;}
    .footer-col a{
        font-size:14px;
        color:rgba(255,255,255,.72);
        text-decoration:underline;
        text-decoration-color:transparent;
        text-underline-offset:4px;
        transition:color .2s ease,text-decoration-color .2s ease;
    }
    .footer-col a:hover{color:var(--c-primary);text-decoration-color:var(--c-primary);}
    .footer-bottom{
        margin-top:40px;
        padding-top:20px;
        border-top:1px solid var(--c-line-dark);
        display:flex;
        flex-wrap:wrap;
        align-items:center;
        gap:14px 24px;
        font-family:var(--font-mono);
        font-size:12.5px;
        color:rgba(255,255,255,.55);
    }
    .footer-bottom .to-top{margin-left:auto;color:rgba(255,255,255,.72);}
    .footer-bottom .to-top:hover{color:var(--c-primary);}

    @media (prefers-reduced-motion:reduce){
        *,*::before,*::after{
            animation-duration:.001ms !important;
            animation-iteration-count:1 !important;
            transition-duration:.001ms !important;
            scroll-behavior:auto !important;
        }
    }

/* roulang page: category1 */
:root{
  --c-primary:#0FBFA0;
  --c-primary-hover:#0AA98D;
  --c-primary-press:#079077;
  --c-accent:#FF8A3D;
  --c-ink:#12161B;
  --c-body:#2A2F36;
  --c-muted:#6C737B;
  --c-bg:#F5F6F3;
  --c-surface:#FFFFFF;
  --c-line:#E3E6E1;
  --c-line-dark:rgba(255,255,255,.12);
  --c-error:#E5484D;
  --radius-card:14px;
  --radius-btn:10px;
  --shadow-sm:0 1px 2px rgba(18,22,27,.04);
  --shadow-md:0 12px 32px -16px rgba(18,22,27,.18);
  --shadow-lg:0 20px 40px -20px rgba(18,22,27,.28);
  --mono:ui-monospace,"JetBrains Mono","SFMono-Regular",Consolas,"Liberation Mono",monospace;
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--c-bg);
  color:var(--c-body);
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","HarmonyOS Sans","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block;height:auto;}
a{color:inherit;text-decoration:none;transition:color .2s ease,border-color .2s ease;}
button,input,select,textarea{font:inherit;color:inherit;}
button{background:none;border:0;cursor:pointer;}
h1,h2,h3,h4,p,ul,ol,dl,figure{margin:0;}
ul,ol{padding:0;}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums;letter-spacing:.02em;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px;}
@media (min-width:768px){.container{padding:0 32px;}}
@media (min-width:1280px){.container{max-width:1280px;}}

/* ---------- 通用按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--radius-btn);font-weight:600;border:1px solid transparent;
  cursor:pointer;transition:background .2s ease,color .2s ease,border-color .2s ease,transform .2s ease,box-shadow .2s ease;
  white-space:nowrap;
}
.btn:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;}
.btn-sm{height:40px;padding:0 16px;font-size:14px;}
.btn-md{height:46px;padding:0 22px;font-size:15px;}
.btn-lg{height:52px;padding:0 28px;font-size:16px;}
.btn-primary{background:var(--c-primary);color:#04231C;}
.btn-primary:hover{background:var(--c-primary-hover);}
.btn-primary:active{background:var(--c-primary-press);}
.btn-primary:disabled{background:#BFD9D3;color:#5F7B75;cursor:not-allowed;}
.btn-ghost{background:transparent;border-color:var(--c-ink);color:var(--c-ink);}
.btn-ghost:hover{background:var(--c-ink);color:#fff;}
.btn-light{background:#fff;border-color:var(--c-line);color:var(--c-ink);}
.btn-light:hover{border-color:var(--c-primary);color:var(--c-primary);}
.btn .arrow{transition:transform .2s ease;}
.btn:hover .arrow{transform:translateX(4px);}

/* ---------- 徽章 ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;height:28px;padding:0 12px;
  border-radius:999px;font-size:13px;line-height:1;border:1px solid var(--c-line);
  background:#fff;color:var(--c-muted);
}
.badge-primary{border-color:rgba(15,191,160,.38);background:rgba(15,191,160,.10);color:#0A8C75;}
.badge-dark{border-color:var(--c-line-dark);background:rgba(255,255,255,.07);color:rgba(255,255,255,.86);}

/* ---------- 头部 ---------- */
.site-header{position:sticky;top:0;z-index:70;background:#fff;border-bottom:1px solid var(--c-line);}
.brand-row{background:rgba(255,255,255,.96);backdrop-filter:saturate(1.5) blur(8px);border-bottom:1px solid var(--c-line);}
.brand-inner{position:relative;display:flex;align-items:center;justify-content:space-between;gap:14px;height:64px;}
.brand{display:flex;align-items:center;gap:10px;min-width:0;}
.logo-badge{
  width:34px;height:34px;flex:0 0 auto;border-radius:10px;background:var(--c-primary);
  color:#04231C;display:grid;place-items:center;font-family:var(--mono);font-weight:700;font-size:13px;
}
.brand-name{font-size:16px;font-weight:800;color:var(--c-ink);letter-spacing:-.01em;white-space:nowrap;}
@media (min-width:768px){.brand-name{font-size:17px;}}
.brand-actions{display:flex;align-items:center;gap:10px;}
.icon-btn{
  width:40px;height:40px;border-radius:10px;border:1px solid var(--c-line);background:#fff;
  color:var(--c-body);display:grid;place-items:center;transition:.2s ease;
}
.icon-btn:hover{border-color:var(--c-primary);color:var(--c-primary);}
.icon-btn:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;}
.header-search{
  position:absolute;right:0;top:calc(100% + 10px);width:min(360px,calc(100vw - 40px));
  background:#fff;border:1px solid var(--c-line);border-radius:14px;padding:10px;
  box-shadow:var(--shadow-lg);display:none;
}
.header-search.is-open{display:block;}
.header-search input{
  width:100%;height:44px;border:1px solid var(--c-line);border-radius:var(--radius-btn);
  padding:0 14px;background:#fff;color:var(--c-ink);font-size:15px;
}
.header-search input:focus{outline:none;border-color:var(--c-primary);box-shadow:0 0 0 2px rgba(15,191,160,.20);}
.menu-toggle{display:grid;}
@media (min-width:1024px){.menu-toggle{display:none;}}

/* ---------- 频道导航 ---------- */
.nav-row{background:var(--c-bg);}
.nav-scroll{display:flex;gap:4px;overflow-x:auto;padding:4px 0;scrollbar-width:none;}
.nav-scroll::-webkit-scrollbar{display:none;}
.nav-link{
  flex:0 0 auto;padding:10px 14px 11px;font-size:15px;color:var(--c-body);
  border-bottom:3px solid transparent;white-space:nowrap;transition:color .2s ease,border-color .2s ease;
}
.nav-link:hover{color:var(--c-primary);}
.nav-link.is-active{color:var(--c-primary);border-bottom-color:var(--c-primary);font-weight:600;}
@media (max-width:1023px){.nav-row{display:none;}}

/* ---------- 抽屉 ---------- */
.drawer-mask{
  position:fixed;inset:0;background:rgba(18,22,27,.52);opacity:0;pointer-events:none;
  transition:opacity .3s ease;z-index:80;
}
.drawer-mask.is-open{opacity:1;pointer-events:auto;}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(330px,86vw);background:#fff;z-index:90;
  transform:translateX(102%);transition:transform .32s cubic-bezier(.2,.7,.2,1);
  padding:20px;overflow-y:auto;
}
.drawer.is-open{transform:none;}
.drawer-head{display:flex;align-items:center;justify-content:space-between;gap:12px;padding-bottom:16px;border-bottom:1px solid var(--c-line);}
.drawer-nav{display:grid;gap:6px;margin-top:16px;}
.drawer-link{padding:14px 12px;border-radius:10px;font-size:17px;font-weight:600;color:var(--c-ink);}
.drawer-link:hover{background:rgba(15,191,160,.08);color:var(--c-primary);}
.drawer-link.is-active{color:var(--c-primary);background:rgba(15,191,160,.10);}
.drawer-note{margin-top:24px;font-size:13px;color:var(--c-muted);line-height:1.7;}

/* ---------- 首屏 ---------- */
.page-hero{position:relative;background:var(--c-ink);color:#fff;overflow:hidden;padding:44px 0 52px;}
.page-hero-bg{
  position:absolute;inset:0;background-image:url('/assets/images/backpic/back-2.png');
  background-size:cover;background-position:center;opacity:.30;
}
.page-hero-shade{
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(18,22,27,.62) 0%,rgba(18,22,27,.88) 62%,rgba(18,22,27,.96) 100%);
}
.page-hero-inner{position:relative;z-index:2;max-width:860px;}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:rgba(255,255,255,.62);}
.crumb a{color:rgba(255,255,255,.82);}
.crumb a:hover{color:var(--c-primary);}
.page-hero h1{
  font-size:clamp(32px,4.8vw,54px);font-weight:800;line-height:1.1;letter-spacing:-.02em;
  color:#fff;margin-top:18px;
}
.hero-sub{margin-top:16px;font-size:16px;color:rgba(255,255,255,.78);max-width:620px;}
@media (min-width:768px){.hero-sub{font-size:17px;}}
.hero-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:12px;margin-top:26px;
  font-size:13px;color:rgba(255,255,255,.58);
}
.dot{width:4px;height:4px;border-radius:50%;background:rgba(255,255,255,.34);}

/* ---------- 区块 ---------- */
.section{padding:60px 0;}
@media (min-width:1024px){.section{padding:88px 0;}}
.section-alt{background:#fff;border-top:1px solid var(--c-line);border-bottom:1px solid var(--c-line);}
.section-tight{padding:48px 0;}
@media (min-width:1024px){.section-tight{padding:64px 0;}}
.sec-title{
  font-size:clamp(24px,3vw,36px);font-weight:800;line-height:1.22;letter-spacing:-.015em;
  color:var(--c-ink);
}
.sec-lead{margin-top:14px;color:var(--c-muted);max-width:700px;font-size:16px;}

/* ---------- 目录 + 正文 ---------- */
.doc-grid{display:grid;grid-template-columns:1fr;gap:28px;}
@media (min-width:1024px){
  .doc-grid{grid-template-columns:268px minmax(0,1fr);gap:56px;align-items:start;}
}
.toc-card{background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--radius-card);padding:20px;box-shadow:var(--shadow-sm);}
@media (min-width:1024px){.doc-aside{position:sticky;top:132px;}}
.toc-title{font-size:12px;letter-spacing:.16em;color:var(--c-muted);margin-bottom:12px;}
.toc-list{list-style:none;display:grid;gap:2px;}
.toc-link{
  display:flex;gap:10px;align-items:baseline;padding:9px 10px;border-radius:9px;font-size:14px;
  color:var(--c-body);border-left:3px solid transparent;transition:.2s ease;
}
.toc-link .mono{font-size:12px;color:var(--c-muted);flex:0 0 auto;}
.toc-link:hover{background:rgba(15,191,160,.07);color:var(--c-primary);}
.toc-link.is-current{color:var(--c-primary);border-left-color:var(--c-primary);background:rgba(15,191,160,.09);font-weight:600;}
.toc-link.is-current .mono{color:var(--c-primary);}

.doc-body{min-width:0;}
.doc-section{padding:32px 0;border-top:1px solid var(--c-line);scroll-margin-top:96px;}
.doc-section:first-child{border-top:0;padding-top:0;}
@media (min-width:1024px){.doc-section{padding:40px 0;scroll-margin-top:140px;}}
.doc-section h2{
  display:flex;align-items:center;gap:12px;flex-wrap:wrap;
  font-size:clamp(21px,2.3vw,28px);font-weight:800;color:var(--c-ink);
  line-height:1.3;letter-spacing:-.01em;margin-bottom:16px;
}
.sec-num{
  font-family:var(--mono);font-size:13px;font-weight:700;color:#0A8C75;
  padding:4px 9px;border-radius:8px;border:1px solid rgba(15,191,160,.35);background:rgba(15,191,160,.10);
}
.doc-section p{margin-bottom:18px;max-width:760px;}
.doc-section p:last-child{margin-bottom:0;}
.doc-section h3{font-size:19px;font-weight:700;color:var(--c-ink);margin:26px 0 12px;}

.check-list{list-style:none;display:grid;gap:10px;margin:0 0 18px;max-width:760px;}
.check-list li{position:relative;padding-left:30px;}
.check-list li::before{
  content:"";position:absolute;left:0;top:9px;width:16px;height:16px;border-radius:5px;
  border:1px solid var(--c-line);background:#fff;
}
.check-list li::after{
  content:"";position:absolute;left:5px;top:12px;width:5px;height:9px;
  border-right:2px solid var(--c-primary);border-bottom:2px solid var(--c-primary);
  transform:rotate(40deg);
}
.tip-panel{
  max-width:760px;margin:0 0 18px;padding:18px 20px;border-radius:var(--radius-card);
  border:1px solid rgba(255,138,61,.35);background:rgba(255,138,61,.07);
}
.tip-panel .tip-title{
  display:flex;align-items:center;gap:8px;font-size:14px;font-weight:700;color:#B85A1B;margin-bottom:6px;
}
.tip-panel p{margin:0;font-size:15px;color:#5C4A3C;}

.mini-def{display:grid;gap:12px;margin:0 0 18px;max-width:780px;}
.mini-def .row{
  display:grid;grid-template-columns:1fr;gap:4px;padding:16px 18px;background:var(--c-surface);
  border:1px solid var(--c-line);border-radius:12px;transition:.2s ease;
}
.mini-def .row:hover{border-color:rgba(15,191,160,.35);box-shadow:var(--shadow-sm);}
@media (min-width:640px){
  .mini-def .row{grid-template-columns:190px minmax(0,1fr);gap:18px;align-items:baseline;}
}
.mini-def .k{font-family:var(--mono);font-size:14px;font-weight:600;color:var(--c-ink);}
.mini-def .v{font-size:15px;color:var(--c-body);}

.figure{margin:24px 0;max-width:780px;}
.figure img{
  width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:var(--radius-card);
  border:1px solid var(--c-line);background:var(--c-line);
}
.figure figcaption{margin-top:10px;font-size:13px;color:var(--c-muted);text-align:center;}

/* ---------- 图文分栏 ---------- */
.feature-split{display:grid;grid-template-columns:1fr;gap:28px;align-items:center;}
@media (min-width:1024px){
  .feature-split{grid-template-columns:minmax(0,1.05fr) minmax(0,1fr);gap:56px;}
}
.feature-split .figure{margin:0;max-width:none;}
.feature-copy h2{margin-top:16px;}
.feature-copy p{margin-top:14px;color:var(--c-body);max-width:620px;}

/* ---------- 步骤卡 ---------- */
.steps{display:grid;grid-template-columns:1fr;gap:16px;}
@media (min-width:640px){.steps{grid-template-columns:repeat(2,1fr);gap:20px;}}
@media (min-width:1024px){.steps{grid-template-columns:repeat(4,1fr);gap:24px;}}
.steps-offset{margin-top:36px;}
@media (min-width:1024px){.steps-offset{margin-top:48px;}}
.step-card{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--radius-card);
  padding:22px;transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
}
.step-card:hover{transform:translateY(-4px);border-color:rgba(15,191,160,.35);box-shadow:var(--shadow-lg);}
.step-num{font-family:var(--mono);font-size:13px;font-weight:700;color:var(--c-primary);letter-spacing:.1em;}
.step-card h3{font-size:17px;font-weight:700;color:var(--c-ink);margin:10px 0 8px;}
.step-card p{font-size:14.5px;color:var(--c-muted);line-height:1.7;}

/* ---------- 数据条 ---------- */
.stats{display:grid;grid-template-columns:1fr;gap:16px;}
@media (min-width:768px){.stats{grid-template-columns:repeat(3,1fr);gap:24px;}}
.stat{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--radius-card);
  padding:26px 24px;text-align:center;transition:.25s ease;
}
.stat:hover{border-color:rgba(15,191,160,.35);box-shadow:var(--shadow-md);}
.stat-num{font-family:var(--mono);font-size:clamp(32px,4vw,44px);font-weight:700;color:var(--c-ink);line-height:1;}
.stat-num em{font-style:normal;font-size:.45em;color:var(--c-muted);margin-left:4px;}
.stat-label{margin-top:12px;font-size:14px;color:var(--c-muted);}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:860px;}
.faq-list{margin-top:32px;border-top:1px solid var(--c-line);}
.faq-item{border-bottom:1px solid var(--c-line);border-left:3px solid transparent;padding-left:0;transition:border-color .2s ease,padding-left .2s ease;}
.faq-item[open]{border-left-color:var(--c-primary);padding-left:16px;}
.faq-q{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 0;font-size:16.5px;font-weight:600;color:var(--c-ink);
  cursor:pointer;list-style:none;
}
@media (min-width:768px){.faq-q{font-size:17px;}}
.faq-q::-webkit-details-marker{display:none;}
.faq-q:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;border-radius:6px;}
.faq-icon{position:relative;width:18px;height:18px;flex:0 0 auto;}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--c-primary);border-radius:2px;
  transform:translate(-50%,-50%);transition:transform .25s ease,opacity .25s ease;
}
.faq-icon::before{width:14px;height:2px;}
.faq-icon::after{width:2px;height:14px;}
.faq-item[open] .faq-icon::after{transform:translate(-50%,-50%) rotate(90deg);opacity:0;}
.faq-a{padding:0 0 22px;max-width:720px;}
.faq-a p{font-size:15.5px;color:var(--c-body);line-height:1.78;}

/* ---------- 分类卡片 ---------- */
.cat-grid{display:grid;grid-template-columns:1fr;gap:20px;margin-top:32px;}
@media (min-width:768px){.cat-grid{grid-template-columns:repeat(3,1fr);gap:24px;}}
.cat-card{
  display:flex;flex-direction:column;background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:var(--radius-card);overflow:hidden;transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
}
.cat-card:hover{transform:translateY(-4px);border-color:rgba(15,191,160,.35);box-shadow:var(--shadow-lg);}
.cat-card .thumb{aspect-ratio:16/9;overflow:hidden;background:var(--c-line);}
.cat-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease;}
.cat-card:hover .thumb img{transform:scale(1.03);}
.cat-card .body{display:flex;flex-direction:column;gap:10px;padding:22px;flex:1;}
.cat-card h3{font-size:18px;font-weight:700;color:var(--c-ink);line-height:1.4;}
.cat-card p{font-size:14.5px;color:var(--c-muted);line-height:1.7;flex:1;}
.cat-more{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--c-primary);}
.cat-card:hover .cat-more .arrow{transform:translateX(4px);}
.cat-more .arrow{transition:transform .2s ease;}

/* ---------- CTA 条 ---------- */
.cta-band{
  background:var(--c-ink);border-radius:20px;padding:34px 26px;color:#fff;
  display:grid;grid-template-columns:1fr;gap:22px;
  border:1px solid rgba(255,255,255,.08);
}
@media (min-width:1024px){
  .cta-band{grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:48px;padding:48px 56px;}
}
.cta-band h2{font-size:clamp(22px,2.6vw,30px);font-weight:800;line-height:1.3;color:#fff;}
.cta-band p{margin-top:12px;color:rgba(255,255,255,.72);max-width:620px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--c-ink);color:rgba(255,255,255,.72);margin-top:80px;padding-top:60px;}
@media (min-width:1024px){.site-footer{margin-top:104px;padding-top:72px;}}
.footer-grid{display:grid;grid-template-columns:1fr;gap:32px;padding-bottom:44px;}
@media (min-width:768px){.footer-grid{grid-template-columns:repeat(2,1fr);}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;}}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:700;font-size:16px;margin-bottom:14px;}
.footer-brand .logo-badge{background:var(--c-primary);color:#04231C;}
.footer-note{font-size:14px;line-height:1.85;color:rgba(255,255,255,.6);max-width:320px;}
.footer-col h3{font-size:14px;font-weight:600;color:#fff;letter-spacing:.04em;margin-bottom:14px;}
.footer-col ul{list-style:none;display:grid;gap:10px;}
.footer-col a{font-size:14px;color:rgba(255,255,255,.72);}
.footer-col a:hover{color:var(--c-primary);text-decoration:underline;text-underline-offset:4px;}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;align-items:center;
  padding:20px 0 30px;border-top:1px solid var(--c-line-dark);
  font-size:13px;color:rgba(255,255,255,.5);
}
.footer-bottom .mono{font-size:12.5px;}
.to-top{color:rgba(255,255,255,.75);}
.to-top:hover{color:var(--c-primary);}

/* ---------- 入场动效 ---------- */
.reveal{opacity:0;transform:translateY(12px);}
.reveal.is-visible{
  opacity:1;transform:none;
  transition:opacity .3s cubic-bezier(.2,.7,.2,1),transform .3s cubic-bezier(.2,.7,.2,1);
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  .reveal{opacity:1;transform:none;}
  *{transition:none !important;animation:none !important;}
}

/* roulang page: category2 */
:root{
  --c-primary:#0FBFA0;
  --c-primary-hover:#0AA98D;
  --c-primary-press:#079077;
  --c-accent:#FF8A3D;
  --c-ink:#12161B;
  --c-body:#2A2F36;
  --c-muted:#6C737B;
  --c-bg:#F5F6F3;
  --c-surface:#FFFFFF;
  --c-line:#E3E6E1;
  --c-line-dark:rgba(255,255,255,.12);
  --c-error:#E5484D;
  --radius-card:14px;
  --radius-btn:10px;
  --shadow-sm:0 1px 2px rgba(18,22,27,.04),0 12px 32px -16px rgba(18,22,27,.18);
  --shadow-hover:0 20px 40px -20px rgba(18,22,27,.24);
  --font-mono:ui-monospace,"JetBrains Mono","SFMono-Regular",Menlo,Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","HarmonyOS Sans","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;line-height:1.75;color:var(--c-body);
  background-color:var(--c-bg);
  background-image:radial-gradient(rgba(18,22,27,.045) 1px,transparent 1px);
  background-size:24px 24px;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
h1,h2,h3{margin:0;color:var(--c-ink);letter-spacing:-.01em}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums}
.container{width:100%;max-width:1200px;margin:0 auto;padding-left:20px;padding-right:20px}
@media(min-width:1024px){.container{padding-left:32px;padding-right:32px}}
@media(min-width:1280px){.container{max-width:1280px}}

/* 入场动效 */
html.js .reveal{opacity:0;transform:translateY(12px);transition:opacity .32s cubic-bezier(.2,.7,.2,1),transform .32s cubic-bezier(.2,.7,.2,1)}
html.js .reveal.is-visible{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){
  html.js .reveal{opacity:1;transform:none;transition:none}
  .cursor{animation:none}
}

/* 顶部导航 */
.site-header{position:sticky;top:0;z-index:60;background:#fff;border-bottom:1px solid var(--c-line);transition:box-shadow .2s ease}
.site-header.is-scrolled{box-shadow:0 8px 26px -20px rgba(18,22,27,.5)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;height:68px}
.brand{display:flex;align-items:center;gap:10px;min-width:0}
.logo-badge{
  display:inline-flex;align-items:center;justify-content:center;
  width:34px;height:34px;flex:0 0 auto;border-radius:9px;
  background:var(--c-primary);color:#07201C;
  font-family:var(--font-mono);font-size:14px;font-weight:700;letter-spacing:-.02em;
}
.brand-text{font-size:17px;font-weight:700;color:var(--c-ink);letter-spacing:-.01em;line-height:1.2}
.header-actions{display:flex;align-items:center;gap:12px}
.search-box input{
  width:230px;height:40px;border:1px solid var(--c-line);border-radius:var(--radius-btn);
  background:#fff;padding:0 14px;font-size:14px;color:var(--c-body);
  transition:border-color .2s ease,box-shadow .2s ease;
}
.search-box input::placeholder{color:#9BA1A8}
.search-box input:focus{border-color:var(--c-primary);box-shadow:0 0 0 3px rgba(15,191,160,.16);outline:none}
.menu-toggle{
  display:none;width:40px;height:40px;border:1px solid var(--c-line);border-radius:var(--radius-btn);
  background:#fff;padding:0;cursor:pointer;flex-direction:column;align-items:center;justify-content:center;gap:4px;
}
.menu-toggle span{display:block;width:16px;height:2px;background:var(--c-ink);border-radius:2px;transition:transform .2s ease}
.menu-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.menu-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.menu-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

.nav-row{background:var(--c-bg);border-bottom:1px solid var(--c-line)}
.nav-scroll{display:flex;gap:28px;overflow-x:auto;scrollbar-width:none}
.nav-scroll::-webkit-scrollbar{display:none}
.nav-link{
  position:relative;padding:13px 0 11px;font-size:15px;color:var(--c-body);
  white-space:nowrap;border-bottom:3px solid transparent;
  transition:color .18s ease,border-color .18s ease;
}
.nav-link:hover{color:var(--c-primary-press)}
.nav-link.is-active{color:var(--c-primary-press);font-weight:600;border-bottom-color:var(--c-primary)}

.mobile-drawer{display:none;background:#fff;border-bottom:1px solid var(--c-line);padding:6px 0 18px}
.mobile-drawer.is-open{display:block}
.mobile-drawer a{display:block;padding:14px 0;font-size:17px;color:var(--c-ink);border-bottom:1px solid var(--c-line)}
.mobile-drawer a:last-child{border-bottom:none}
.mobile-drawer a.is-active{color:var(--c-primary-press);font-weight:700}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 20px;border-radius:var(--radius-btn);
  border:1px solid transparent;font-size:15px;font-weight:600;cursor:pointer;white-space:nowrap;
  transition:background-color .18s ease,color .18s ease,border-color .18s ease,transform .18s ease,box-shadow .18s ease;
}
.btn .arrow{transition:transform .18s ease}
.btn:hover .arrow{transform:translateX(4px)}
.btn-primary{background:var(--c-primary);color:#06231E}
.btn-primary:hover{background:var(--c-primary-hover)}
.btn-primary:active{background:var(--c-primary-press)}
.btn-primary:disabled{background:#CFE9E3;color:#8AA7A1;cursor:not-allowed}
.btn-ghost{background:transparent;border-color:var(--c-ink);color:var(--c-ink)}
.btn-ghost:hover{background:var(--c-ink);color:#fff}
.btn-ghost:active{background:#000;color:#fff}
.btn-sm{height:38px;padding:0 16px;font-size:14px}
.btn-lg{height:52px;padding:0 26px;font-size:16px}

/* 内页首屏 */
.page-hero{
  position:relative;overflow:hidden;color:#fff;
  background:#12161B url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
}
.page-hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(18,22,27,.94) 0%,rgba(18,22,27,.82) 46%,rgba(18,22,27,.58) 100%);
}
.page-hero .container{position:relative;z-index:2;padding-top:52px;padding-bottom:52px}
@media(min-width:1024px){.page-hero .container{padding-top:74px;padding-bottom:74px}}
.breadcrumb{display:flex;align-items:center;gap:10px;font-size:13.5px;color:rgba(255,255,255,.6);margin-bottom:22px;flex-wrap:wrap}
.breadcrumb a{color:rgba(255,255,255,.78);transition:color .18s}
.breadcrumb a:hover{color:var(--c-primary)}
.breadcrumb .sep{color:rgba(255,255,255,.35)}
.breadcrumb [aria-current]{color:#fff}
.hero-title{
  color:#fff;font-size:clamp(30px,5vw,58px);font-weight:800;line-height:1.14;letter-spacing:-.02em;
  max-width:900px;
}
.cursor{
  display:inline-block;width:4px;height:.86em;margin-left:10px;vertical-align:-2px;
  background:var(--c-primary);animation:blink 1.1s infinite;
}
@keyframes blink{0%,49%{opacity:1}50%,100%{opacity:0}}
.hero-sub{margin-top:18px;font-size:16px;color:rgba(255,255,255,.78);max-width:720px;line-height:1.8}
.hero-meta{display:flex;align-items:center;gap:14px;flex-wrap:wrap;margin-top:26px;font-size:13px;color:rgba(255,255,255,.62)}
.hero-meta .dot{display:inline-block;width:4px;height:4px;border-radius:50%;background:rgba(255,255,255,.35)}

/* 板块 */
.section{padding:56px 0}
@media(min-width:1024px){.section{padding:96px 0}}
.section-tight{padding:36px 0}
@media(min-width:1024px){.section-tight{padding:52px 0}}
.section-head{max-width:760px;margin-bottom:34px}
@media(min-width:1024px){.section-head{margin-bottom:46px}}
.eyebrow{display:inline-block;font-family:var(--font-mono);font-size:12.5px;letter-spacing:.1em;color:var(--c-primary-press);margin-bottom:12px}
.section-head h2{font-size:clamp(24px,3.1vw,38px);line-height:1.22;font-weight:800}
.section-desc{margin-top:14px;font-size:16px;color:var(--c-muted);line-height:1.8;max-width:700px}
.lede{
  font-size:17px;line-height:1.85;color:var(--c-body);max-width:760px;
  border-left:3px solid var(--c-primary);padding-left:18px;
}

/* 对比矩阵 */
.compare-wrap{
  background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:var(--radius-card);overflow:hidden;box-shadow:var(--shadow-sm);
}
.compare-head,.compare-row{display:grid;grid-template-columns:1.1fr 1.3fr 1fr 1fr}
.compare-head{background:var(--c-bg);border-bottom:1px solid var(--c-line)}
.compare-head .c-cell{font-weight:700;color:var(--c-ink);font-size:15px}
.compare-row{border-bottom:1px solid var(--c-line);transition:background-color .18s ease}
.compare-row:last-child{border-bottom:none}
.compare-row:hover{background:rgba(15,191,160,.04)}
.c-cell{
  display:flex;align-items:center;padding:16px 18px;
  border-right:1px solid var(--c-line);
  font-size:14.5px;line-height:1.65;color:var(--c-body);
}
.c-cell:last-child{border-right:none}
.c-cell.is-row-head{font-weight:600;color:var(--c-ink);background:rgba(18,22,27,.025)}
.c-cell.is-highlight{background:rgba(15,191,160,.07);color:var(--c-ink);font-weight:600}
.compare-foot{
  display:flex;align-items:center;gap:10px;flex-wrap:wrap;
  margin-top:18px;font-size:13.5px;color:var(--c-muted);
}
.tag{
  display:inline-flex;align-items:center;height:26px;padding:0 10px;border-radius:999px;
  border:1px solid var(--c-line);background:var(--c-bg);font-size:13px;color:var(--c-body);white-space:nowrap;
}
.tag-primary{background:rgba(15,191,160,.1);border-color:rgba(15,191,160,.36);color:var(--c-primary-press)}
.tag-accent{background:rgba(255,138,61,.12);border-color:rgba(255,138,61,.42);color:#AB4A12}

/* 数据速览 */
.stat-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
@media(min-width:900px){.stat-grid{grid-template-columns:repeat(4,1fr);gap:24px}}
.stat-card{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--radius-card);
  padding:24px;box-shadow:var(--shadow-sm);transition:transform .24s ease,box-shadow .24s ease,border-color .24s ease;
}
.stat-card:hover{transform:translateY(-4px);border-color:rgba(15,191,160,.45);box-shadow:var(--shadow-hover)}
.stat-num{display:block;font-family:var(--font-mono);font-size:clamp(28px,3.4vw,36px);font-weight:800;color:var(--c-ink);line-height:1;letter-spacing:-.02em}
.stat-unit{font-size:14px;font-weight:600;color:var(--c-primary-press);margin-left:5px}
.stat-label{display:block;margin-top:10px;font-size:14px;font-weight:600;color:var(--c-primary-press)}
.stat-card p{margin-top:8px;font-size:14px;color:var(--c-muted);line-height:1.7}

/* 选择卡片 */
.card-grid{display:grid;grid-template-columns:1fr;gap:18px}
@media(min-width:640px){.card-grid{grid-template-columns:repeat(2,1fr);gap:20px}}
@media(min-width:1024px){.card-grid{grid-template-columns:repeat(3,1fr);gap:24px}}
.choice-card{
  display:flex;flex-direction:column;overflow:hidden;
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--radius-card);
  box-shadow:var(--shadow-sm);
  transition:transform .26s cubic-bezier(.2,.7,.2,1),box-shadow .26s ease,border-color .26s ease;
}
.choice-card:hover{transform:translateY(-4px);border-color:rgba(15,191,160,.45);box-shadow:var(--shadow-hover)}
.choice-media{aspect-ratio:16/9;overflow:hidden;background:var(--c-bg)}
.choice-media img{width:100%;height:100%;object-fit:cover;transition:transform .4s cubic-bezier(.2,.7,.2,1)}
.choice-card:hover .choice-media img{transform:scale(1.03)}
.choice-body{display:flex;flex-direction:column;gap:10px;flex:1;padding:22px}
.choice-no{font-family:var(--font-mono);font-size:13px;color:var(--c-muted)}
.choice-card h3{font-size:20px;font-weight:700;line-height:1.35}
.choice-card p{font-size:14.5px;color:var(--c-muted);line-height:1.75}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:auto;padding-top:8px}

/* 深色区块 */
.dark-panel{
  position:relative;overflow:hidden;background:var(--c-ink);color:#fff;
  border-radius:18px;padding:34px 22px;
}
@media(min-width:1024px){.dark-panel{padding:56px 48px}}
.dark-panel h2{color:#fff;font-size:clamp(23px,2.9vw,34px);line-height:1.25;font-weight:800}
.dark-panel .section-desc{color:rgba(255,255,255,.66)}
.tips-list{display:grid;gap:16px;margin-top:32px}
@media(min-width:768px){.tips-list{grid-template-columns:repeat(2,1fr);gap:20px}}
.tip-item{
  display:flex;gap:16px;padding:20px;border:1px solid var(--c-line-dark);
  border-radius:var(--radius-card);background:rgba(255,255,255,.03);
  transition:background-color .22s ease,border-color .22s ease;
}
.tip-item:hover{background:rgba(255,255,255,.06);border-color:rgba(15,191,160,.4)}
.tip-no{font-family:var(--font-mono);font-size:14px;color:var(--c-primary);flex:0 0 auto;padding-top:2px}
.tip-item h3{font-size:17px;color:#fff;margin-bottom:6px}
.tip-item p{font-size:14px;color:rgba(255,255,255,.68);line-height:1.75}

/* FAQ */
.faq-list{border-top:1px solid var(--c-line)}
.faq-item{border-bottom:1px solid var(--c-line);border-left:3px solid transparent;transition:border-color .2s ease}
.faq-item.is-open{border-left-color:var(--c-primary)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 6px 20px 18px;background:none;border:none;text-align:left;cursor:pointer;
  font-size:17px;font-weight:600;color:var(--c-ink);line-height:1.6;
  transition:color .2s ease;
}
.faq-q:hover{color:var(--c-primary-press)}
.faq-icon{position:relative;width:16px;height:16px;flex:0 0 auto}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;left:0;top:50%;width:16px;height:2px;background:var(--c-primary);
  transform-origin:center;transition:transform .24s ease;
}
.faq-icon::after{transform:rotate(90deg)}
.faq-item.is-open .faq-icon::after{transform:rotate(0deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease}
.faq-item.is-open .faq-a{max-height:420px}
.faq-a-inner{padding:0 6px 22px 18px;max-width:780px;font-size:15.5px;line-height:1.85;color:var(--c-body)}

/* CTA 横条 */
.cta-bar{
  display:flex;flex-direction:column;gap:18px;align-items:flex-start;
  background:var(--c-ink);border-radius:18px;padding:28px 22px;color:#fff;
  position:relative;overflow:hidden;
}
@media(min-width:768px){.cta-bar{flex-direction:row;align-items:center;justify-content:space-between;padding:36px 48px}}
.cta-bar h2{color:#fff;font-size:clamp(20px,2.4vw,27px);font-weight:800;line-height:1.3}
.cta-bar p{margin-top:10px;font-size:14.5px;color:rgba(255,255,255,.66);max-width:620px;line-height:1.75}

/* 页脚 */
.site-footer{background:var(--c-ink);color:rgba(255,255,255,.72);margin-top:72px;padding-top:60px}
.footer-grid{display:grid;grid-template-columns:1fr;gap:32px;padding-bottom:44px}
@media(min-width:640px){.footer-grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1024px){.footer-grid{grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px}}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-size:17px;font-weight:700;margin-bottom:14px}
.footer-note{margin:0;max-width:340px;font-size:14px;line-height:1.8;color:rgba(255,255,255,.6)}
.footer-col h3{font-size:14px;color:#fff;font-weight:600;letter-spacing:.02em;margin-bottom:16px}
.footer-col ul{display:grid;gap:10px}
.footer-col a{font-size:14px;color:rgba(255,255,255,.72);transition:color .18s ease}
.footer-col a:hover{color:var(--c-primary);text-decoration:underline;text-underline-offset:4px}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between;
  border-top:1px solid var(--c-line-dark);padding:20px 0 26px;
  font-family:var(--font-mono);font-size:12.5px;color:rgba(255,255,255,.5);
}
.to-top{color:var(--c-primary);transition:color .18s ease}
.to-top:hover{color:#fff}

@media(max-width:767px){
  .header-inner{height:60px}
  .brand-text{font-size:15px}
  .search-box{display:none}
  .menu-toggle{display:flex}
  .nav-row{display:none}
  .hero-title{font-size:clamp(26px,7.4vw,36px)}
}
@media(max-width:900px){
  .compare-wrap{background:transparent;border:none;box-shadow:none;border-radius:0;overflow:visible}
  .compare-head{display:none}
  .compare-row{
    display:block;background:var(--c-surface);border:1px solid var(--c-line);
    border-radius:var(--radius-card);margin-bottom:14px;padding:6px;box-shadow:var(--shadow-sm);
  }
  .compare-row:hover{background:var(--c-surface)}
  .c-cell{
    justify-content:space-between;align-items:flex-start;gap:16px;
    border-right:none;border-bottom:1px dashed var(--c-line);padding:12px 14px;
  }
  .c-cell:last-child{border-bottom:none}
  .c-cell.is-row-head{
    justify-content:flex-start;font-size:16px;background:rgba(15,191,160,.08);
    border-bottom:1px solid var(--c-line);border-radius:9px 9px 0 0;
  }
  .c-cell[data-label]::before{
    content:attr(data-label);flex:0 0 82px;
    font-family:var(--font-mono);font-size:12.5px;color:var(--c-muted);
  }
  .c-cell[data-label]{font-size:14px}
}

/* roulang page: category3 */
:root{
  --c-primary:#0FBFA0;
  --c-primary-hover:#0AA98D;
  --c-primary-press:#079077;
  --c-accent:#FF8A3D;
  --c-ink:#12161B;
  --c-body:#2A2F36;
  --c-muted:#6C737B;
  --c-bg:#F5F6F3;
  --c-surface:#FFFFFF;
  --c-line:#E3E6E1;
  --c-line-dark:rgba(255,255,255,.12);
  --c-error:#E5484D;
  --r-card:14px;
  --r-btn:10px;
  --r-input:10px;
  --shadow-sm:0 1px 2px rgba(18,22,27,.04),0 12px 32px -16px rgba(18,22,27,.18);
  --shadow-hover:0 20px 40px -20px rgba(18,22,27,.28);
  --font-sans:-apple-system,"PingFang SC","HarmonyOS Sans","Microsoft YaHei","Noto Sans SC",sans-serif;
  --font-mono:ui-monospace,"JetBrains Mono","SFMono-Regular",Menlo,Consolas,monospace;
  --max-w:1280px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--c-bg);color:var(--c-body);
  font-family:var(--font-sans);font-size:16.5px;line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none;transition:color .2s ease}
button{font:inherit;cursor:pointer;border:0;background:none;color:inherit}
input{font:inherit}
ul,ol{margin:0;padding:0;list-style:none}
p{margin:0 0 20px}
p:last-child{margin-bottom:0}
h1,h2,h3,h4{margin:0;color:var(--c-ink);font-weight:800;letter-spacing:-.01em}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums}
.container{width:100%;max-width:var(--max-w);margin:0 auto;padding:0 20px}
@media(min-width:768px){.container{padding:0 28px}}
@media(min-width:1280px){.container{padding:0 32px}}
::selection{background:rgba(15,191,160,.24)}

/* ---------- 顶部品牌行 ---------- */
.site-header{position:sticky;top:0;z-index:60;background:var(--c-surface)}
.brand-row{border-bottom:1px solid var(--c-line);transition:box-shadow .25s ease}
.site-header.is-scrolled .brand-row{box-shadow:0 6px 24px -18px rgba(18,22,27,.45)}
.brand-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:68px;padding-top:8px;padding-bottom:8px;transition:min-height .2s ease}
.site-header.is-scrolled .brand-inner{min-height:58px}
.brand{display:inline-flex;align-items:center;gap:12px;min-width:0}
.logo-badge{
  display:inline-flex;align-items:center;justify-content:center;
  width:38px;height:38px;border-radius:11px;flex:0 0 auto;
  background:var(--c-ink);color:#fff;font-family:var(--font-mono);
  font-size:14px;font-weight:700;letter-spacing:.02em;
}
.brand-name{
  font-size:17px;font-weight:800;color:var(--c-ink);letter-spacing:-.01em;
  line-height:1.2;white-space:nowrap;
}
.brand-sub{display:block;font-size:12px;font-weight:500;color:var(--c-muted);letter-spacing:.04em;font-family:var(--font-mono)}
.brand-actions{display:flex;align-items:center;gap:10px}
.search-box{display:none;align-items:center;background:var(--c-bg);border:1px solid var(--c-line);border-radius:var(--r-input);padding:0 6px 0 12px;height:40px;transition:border-color .2s,box-shadow .2s}
.search-box:focus-within{border-color:var(--c-primary);box-shadow:0 0 0 2px rgba(15,191,160,.18)}
.search-box input{border:0;background:transparent;outline:none;width:180px;font-size:14px;color:var(--c-body)}
.search-box input::placeholder{color:var(--c-muted)}
.search-box button{font-size:13px;color:var(--c-primary);padding:6px 8px;border-radius:8px}
.search-box button:hover{background:rgba(15,191,160,.1)}
@media(min-width:900px){.search-box{display:flex}}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-size:15px;font-weight:600;line-height:1;
  padding:14px 22px;border-radius:var(--r-btn);
  border:1px solid transparent;cursor:pointer;
  transition:background-color .2s,color .2s,border-color .2s,transform .2s,box-shadow .2s;
}
.btn .arrow{transition:transform .2s ease}
.btn:hover .arrow{transform:translateX(4px)}
.btn-primary{background:var(--c-primary);color:#04231D;box-shadow:0 10px 24px -16px rgba(15,191,160,.9)}
.btn-primary:hover{background:var(--c-primary-hover)}
.btn-primary:active{background:var(--c-primary-press);transform:translateY(1px)}
.btn-ghost{background:transparent;color:var(--c-ink);border-color:rgba(18,22,27,.35)}
.btn-ghost:hover{background:var(--c-ink);color:#fff;border-color:var(--c-ink)}
.btn-invert{background:#fff;color:var(--c-ink)}
.btn-invert:hover{background:var(--c-primary);color:#04231D}
.btn-sm{padding:10px 16px;font-size:14px}
.btn:focus-visible,a:focus-visible,button:focus-visible,input:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px}
.btn:disabled{opacity:.5;cursor:not-allowed}

.nav-toggle{
  display:inline-flex;align-items:center;gap:6px;
  border:1px solid var(--c-line);border-radius:var(--r-btn);
  padding:9px 14px;font-size:14px;font-weight:600;color:var(--c-ink);
}
.nav-toggle:hover{border-color:var(--c-primary);color:var(--c-primary)}
@media(min-width:1024px){.nav-toggle{display:none}}

/* ---------- 频道导航 ---------- */
.nav-row{background:var(--c-bg);border-bottom:1px solid var(--c-line)}
.nav-scroll{display:flex;align-items:center;gap:4px;overflow-x:auto;scrollbar-width:none}
.nav-scroll::-webkit-scrollbar{display:none}
.nav-link{
  display:inline-block;white-space:nowrap;padding:14px 14px;
  font-size:15px;color:var(--c-body);
  border-bottom:3px solid transparent;transition:color .2s,border-color .2s;
}
.nav-link:hover{color:var(--c-primary)}
.nav-link.is-active{color:var(--c-primary);border-bottom-color:var(--c-primary);font-weight:700}
@media(max-width:1023px){.nav-row{display:none}}

/* ---------- 移动抽屉 ---------- */
.drawer{
  position:fixed;inset:0;z-index:80;background:var(--c-surface);
  transform:translateX(100%);transition:transform .28s cubic-bezier(.2,.7,.2,1);
  display:flex;flex-direction:column;padding:20px;overflow-y:auto;
}
.drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:24px}
.drawer-close{border:1px solid var(--c-line);border-radius:var(--r-btn);padding:8px 14px;font-size:14px}
.drawer-list a{
  display:block;padding:16px 4px;font-size:19px;font-weight:700;color:var(--c-ink);
  border-bottom:1px solid var(--c-line);
}
.drawer-list a.is-active{color:var(--c-primary)}
.drawer-cta{margin-top:28px}

/* ---------- Hero ---------- */
.page-hero{position:relative;background:var(--c-surface);border-bottom:1px solid var(--c-line);overflow:hidden;padding:48px 0 0}
.page-hero::after{
  content:"";position:absolute;inset:auto -10% -60% auto;width:520px;height:520px;border-radius:50%;
  background:radial-gradient(circle,rgba(15,191,160,.14),transparent 62%);pointer-events:none;
}
.hero-grid{position:relative;z-index:1;display:grid;gap:36px;align-items:center;padding-bottom:36px}
@media(min-width:960px){.hero-grid{grid-template-columns:1.05fr .95fr;gap:56px;padding-bottom:44px}}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--c-muted);margin-bottom:20px;flex-wrap:wrap}
.breadcrumb a:hover{color:var(--c-primary)}
.breadcrumb span[aria-current]{color:var(--c-body)}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  background:var(--c-bg);border:1px solid var(--c-line);border-radius:999px;
  padding:6px 14px;font-size:13px;line-height:1.6;color:var(--c-muted);
}
.badge-primary{background:rgba(15,191,160,.1);border-color:rgba(15,191,160,.32);color:var(--c-primary-press);font-weight:600}
.badge-accent{background:rgba(255,138,61,.12);border-color:rgba(255,138,61,.35);color:#B34F0C;font-weight:600}
h1{font-size:clamp(34px,5.4vw,64px);line-height:1.08;letter-spacing:-.02em;margin:18px 0 0}
.hero-sub{margin-top:16px;font-size:clamp(17px,2vw,21px);font-weight:600;color:var(--c-primary-press);line-height:1.5}
.hero-desc{margin-top:18px;max-width:640px;color:var(--c-body)}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.hero-media{position:relative;border-radius:var(--r-card);overflow:hidden;border:1px solid var(--c-line);box-shadow:var(--shadow-sm)}
.hero-media img{width:100%;aspect-ratio:16/11;object-fit:cover}
.hero-media figcaption{
  position:absolute;left:14px;bottom:14px;background:rgba(18,22,27,.78);color:#fff;
  font-size:12.5px;padding:7px 12px;border-radius:999px;font-family:var(--font-mono);
}
.hero-facts{
  position:relative;z-index:1;
  display:grid;grid-template-columns:repeat(2,1fr);gap:1px;
  background:var(--c-line);border:1px solid var(--c-line);border-radius:var(--r-card);
  overflow:hidden;margin-bottom:44px;
}
@media(min-width:768px){.hero-facts{grid-template-columns:repeat(4,1fr)}}
.fact{background:var(--c-surface);padding:18px 20px}
.fact-label{display:block;font-size:12.5px;color:var(--c-muted);letter-spacing:.02em}
.fact-value{display:block;font-size:22px;font-weight:700;color:var(--c-ink);margin-top:4px;font-family:var(--font-mono)}

/* ---------- 板块 ---------- */
.section{padding:56px 0}
@media(min-width:768px){.section{padding:80px 0}}
@media(min-width:1024px){.section{padding:100px 0}}
.section-alt{background:var(--c-surface);border-top:1px solid var(--c-line);border-bottom:1px solid var(--c-line)}
.section-dark{background:var(--c-ink);color:rgba(255,255,255,.78)}
.section-dark h2,.section-dark h3{color:#fff}
.section-dark .eyebrow{color:var(--c-primary)}
.section-head{max-width:760px;margin-bottom:36px}
@media(min-width:768px){.section-head{margin-bottom:48px}}
.eyebrow{
  display:inline-block;font-family:var(--font-mono);font-size:13px;letter-spacing:.14em;
  text-transform:uppercase;color:var(--c-primary-press);margin-bottom:14px;
}
h2{font-size:clamp(25px,3.2vw,38px);line-height:1.2}
.section-head p{margin-top:16px;color:var(--c-muted);max-width:700px}
.section-dark .section-head p{color:rgba(255,255,255,.66)}
h3{font-size:20px;line-height:1.35}

/* ---------- 步骤条 ---------- */
.step-bar{
  display:grid;grid-template-columns:1fr;gap:14px;
}
@media(min-width:640px){.step-bar{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1024px){.step-bar{grid-template-columns:repeat(4,1fr);gap:18px;position:relative}}
.step-bar li{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:22px 20px;position:relative;transition:border-color .2s,transform .2s,box-shadow .2s;
}
.step-bar li:hover{border-color:rgba(15,191,160,.5);transform:translateY(-4px);box-shadow:var(--shadow-hover)}
.step-num{
  display:inline-flex;align-items:center;justify-content:center;
  width:44px;height:44px;border-radius:12px;background:rgba(15,191,160,.12);
  color:var(--c-primary-press);font-family:var(--font-mono);font-size:17px;font-weight:700;
  margin-bottom:14px;
}
.step-bar h3{font-size:18px}
.step-bar p{margin-top:8px;font-size:14.5px;color:var(--c-muted);line-height:1.7}
.step-line{display:none}
@media(min-width:1024px){
  .step-line{display:block;position:absolute;top:44px;left:0;right:0;height:1px;background:repeating-linear-gradient(90deg,var(--c-line) 0 8px,transparent 8px 16px);z-index:-1}
}

/* ---------- 详情卡 ---------- */
.detail-grid{display:grid;gap:20px}
@media(min-width:768px){.detail-grid{grid-template-columns:repeat(2,1fr);gap:24px}}
.detail-card{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:26px 24px;display:flex;flex-direction:column;gap:16px;
  transition:border-color .2s,box-shadow .2s,transform .2s;
}
.detail-card:hover{border-color:rgba(15,191,160,.45);box-shadow:var(--shadow-sm);transform:translateY(-3px)}
.detail-top{display:flex;align-items:center;gap:14px}
.detail-index{font-family:var(--font-mono);font-size:30px;font-weight:700;color:var(--c-line);letter-spacing:-.03em}
.detail-card h3{font-size:19px}
.detail-block{border-top:1px dashed var(--c-line);padding-top:14px}
.detail-block h4{font-size:13px;letter-spacing:.08em;color:var(--c-muted);font-family:var(--font-mono);font-weight:600;margin-bottom:10px}
.tick-list li{position:relative;padding-left:20px;font-size:15px;line-height:1.7;margin-bottom:8px;color:var(--c-body)}
.tick-list li:last-child{margin-bottom:0}
.tick-list li::before{
  content:"";position:absolute;left:0;top:11px;width:8px;height:8px;border-radius:50%;
  border:2px solid var(--c-primary);background:transparent;
}
.note{
  background:var(--c-bg);border:1px solid var(--c-line);border-left:3px solid var(--c-accent);
  border-radius:8px;padding:12px 14px;font-size:14px;color:var(--c-muted);line-height:1.7;
}

/* ---------- 提示语速查 ---------- */
.query-grid{display:grid;gap:16px}
@media(min-width:640px){.query-grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1024px){.query-grid{grid-template-columns:repeat(3,1fr)}}
.query-card{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:22px 20px;transition:border-color .2s,transform .2s,box-shadow .2s;
}
.query-card:hover{border-color:rgba(15,191,160,.45);transform:translateY(-4px);box-shadow:var(--shadow-hover)}
.query-code{
  display:inline-block;font-family:var(--font-mono);font-size:13.5px;
  background:var(--c-bg);border:1px solid var(--c-line);border-radius:999px;
  padding:5px 12px;color:var(--c-ink);margin-bottom:14px;
}
.query-card p{margin:0;font-size:15px;line-height:1.7;color:var(--c-muted)}
.query-card strong{color:var(--c-body)}

/* ---------- 场景列表 ---------- */
.scene-list{display:grid;gap:0;border-top:1px solid var(--c-line)}
.scene-item{
  display:grid;grid-template-columns:auto 1fr;gap:18px;align-items:start;
  padding:24px 4px;border-bottom:1px solid var(--c-line);transition:background-color .2s;
}
.scene-item:hover{background:rgba(15,191,160,.045)}
.scene-no{font-family:var(--font-mono);font-size:14px;font-weight:700;color:var(--c-primary);padding-top:4px}
.scene-item h3{font-size:18px}
.scene-item p{margin-top:8px;color:var(--c-muted);font-size:15.5px;max-width:760px}
.scene-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}

/* ---------- 深色安全区 ---------- */
.safety-grid{display:grid;gap:1px;background:var(--c-line-dark);border:1px solid var(--c-line-dark);border-radius:var(--r-card);overflow:hidden}
@media(min-width:768px){.safety-grid{grid-template-columns:repeat(3,1fr)}}
.safety-card{background:var(--c-ink);padding:26px 22px}
.safety-card h3{font-size:17px;margin-bottom:10px}
.safety-card p{font-size:14.5px;line-height:1.75;color:rgba(255,255,255,.66)}
.safety-icon{
  display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;
  border-radius:11px;border:1px solid var(--c-line-dark);color:var(--c-primary);
  font-family:var(--font-mono);font-size:15px;font-weight:700;margin-bottom:16px;
}

/* ---------- FAQ ---------- */
.faq-list{border-top:1px solid var(--c-line)}
.faq-item{border-bottom:1px solid var(--c-line)}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:22px 4px;font-size:17px;font-weight:600;color:var(--c-ink);line-height:1.5;
  transition:color .2s;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--c-primary)}
.faq-icon{
  flex:0 0 auto;width:26px;height:26px;border-radius:50%;border:1px solid var(--c-line);
  display:inline-flex;align-items:center;justify-content:center;font-size:16px;color:var(--c-primary);
  transition:transform .25s ease,background-color .2s,border-color .2s;font-family:var(--font-mono);
}
.faq-item[open] .faq-icon{transform:rotate(45deg);background:rgba(15,191,160,.12);border-color:rgba(15,191,160,.4)}
.faq-item[open] summary{color:var(--c-primary-press)}
.faq-body{padding:0 4px 24px 18px;border-left:3px solid var(--c-primary);margin-left:0;color:var(--c-body)}
.faq-body p{font-size:15.5px;max-width:760px}

/* ---------- CTA 横条 ---------- */
.cta-bar{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:28px 24px;display:flex;flex-direction:column;gap:20px;align-items:flex-start;
  box-shadow:var(--shadow-sm);
}
@media(min-width:900px){
  .cta-bar{flex-direction:row;align-items:center;justify-content:space-between;padding:32px 36px;gap:32px}
}
.cta-bar h3{font-size:22px}
.cta-bar p{margin-top:10px;color:var(--c-muted);font-size:15.5px;max-width:620px}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--c-ink);color:rgba(255,255,255,.72);padding:56px 0 24px;margin-top:0}
@media(min-width:768px){.site-footer{padding:72px 0 28px}}
.footer-grid{display:grid;gap:36px}
@media(min-width:640px){.footer-grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1024px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px}}
.footer-brand{display:flex;align-items:center;gap:12px;color:#fff;font-size:17px;font-weight:800;letter-spacing:-.01em}
.footer-brand .logo-badge{background:rgba(255,255,255,.1);color:#fff}
.footer-note{margin-top:16px;font-size:14.5px;line-height:1.75;color:rgba(255,255,255,.6);max-width:340px}
.footer-col h3{font-size:14px;color:#fff;letter-spacing:.06em;margin-bottom:16px;font-family:var(--font-mono);font-weight:600}
.footer-col li{margin-bottom:11px}
.footer-col a{font-size:14.5px;color:rgba(255,255,255,.72)}
.footer-col a:hover{color:var(--c-primary);text-decoration:underline;text-underline-offset:3px}
.footer-bottom{
  margin-top:44px;padding-top:22px;border-top:1px solid var(--c-line-dark);
  display:flex;flex-wrap:wrap;gap:12px 24px;align-items:center;justify-content:space-between;
  font-family:var(--font-mono);font-size:12.5px;color:rgba(255,255,255,.52);
}
.to-top{color:rgba(255,255,255,.72)}
.to-top:hover{color:var(--c-primary)}

/* ---------- 入场动效 ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .3s cubic-bezier(.2,.7,.2,1),transform .3s cubic-bezier(.2,.7,.2,1)}
.reveal.is-in{opacity:1;transform:none}
.cursor{
  display:inline-block;width:3px;height:1em;background:var(--c-primary);
  vertical-align:-.12em;margin-left:6px;animation:blink 1.1s steps(1) infinite;
}
@keyframes blink{0%,50%{opacity:1}50.01%,100%{opacity:0}}
@media(prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
}

/* roulang page: category4 */
:root{
  --c-primary:#0FBFA0;
  --c-primary-hover:#0AA98D;
  --c-primary-press:#079077;
  --c-accent:#FF8A3D;
  --c-ink:#12161B;
  --c-body:#2A2F36;
  --c-muted:#6C737B;
  --c-bg:#F5F6F3;
  --c-surface:#FFFFFF;
  --c-line:#E3E6E1;
  --c-line-dark:rgba(255,255,255,.12);
  --c-error:#E5484D;
  --r-card:14px;
  --r-btn:10px;
  --r-badge:999px;
  --sh-1:0 1px 2px rgba(18,22,27,.04),0 12px 32px -16px rgba(18,22,27,.18);
  --sh-2:0 20px 40px -20px rgba(18,22,27,.30);
  --sans:-apple-system,BlinkMacSystemFont,"PingFang SC","HarmonyOS Sans","Microsoft YaHei","Noto Sans SC",sans-serif;
  --mono:ui-monospace,"JetBrains Mono",SFMono-Regular,Menlo,Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;font-family:var(--sans);font-size:16px;line-height:1.75;
  color:var(--c-body);background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{margin:0;color:var(--c-ink);font-weight:800;letter-spacing:-.02em;line-height:1.2}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
button{font:inherit;cursor:pointer;border:0;background:none;color:inherit}
input{font:inherit}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;border-radius:6px}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
@media(min-width:1024px){.container{padding:0 32px}}
@media(min-width:1280px){.container{max-width:1280px}}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:70;background:#fff;transition:box-shadow .25s ease}
.site-header.is-scrolled{box-shadow:0 10px 26px -20px rgba(18,22,27,.5)}
.brand-row{background:#fff;border-bottom:1px solid var(--c-line)}
.brand-row .container{display:flex;align-items:center;gap:16px;height:64px;transition:height .25s ease}
.site-header.is-scrolled .brand-row .container{height:56px}
.brand{display:flex;align-items:center;gap:10px;min-width:0}
.logo-badge{
  display:inline-flex;align-items:center;justify-content:center;
  width:34px;height:34px;border-radius:9px;background:var(--c-ink);color:#fff;
  font-family:var(--mono);font-size:13px;font-weight:700;letter-spacing:.02em;flex:0 0 auto;
}
.brand-name{font-size:17px;font-weight:800;color:var(--c-ink);letter-spacing:-.01em;line-height:1.15;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.brand-actions{display:flex;align-items:center;gap:10px;margin-left:auto}
.search-box{display:flex;align-items:center;gap:6px;border:1px solid var(--c-line);border-radius:var(--r-btn);background:#fff;padding:4px 6px;transition:border-color .2s,box-shadow .2s}
.search-box:focus-within{border-color:var(--c-primary);box-shadow:0 0 0 2px rgba(15,191,160,.18)}
.search-toggle{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:8px;color:var(--c-muted);transition:color .2s,background .2s}
.search-toggle:hover{color:var(--c-primary-press);background:var(--c-bg)}
.search-box input[type="search"]{
  width:0;opacity:0;border:0;background:transparent;height:36px;font-size:15px;color:var(--c-body);
  transition:width .28s cubic-bezier(.2,.7,.2,1),opacity .22s;
}
.search-box input[type="search"]::placeholder{color:var(--c-muted)}
.search-box.is-open input[type="search"]{width:210px;opacity:1;padding:0 8px 0 2px}
.burger{display:none;align-items:center;justify-content:center;width:40px;height:40px;border:1px solid var(--c-line);border-radius:10px;color:var(--c-ink);transition:border-color .2s,background .2s}
.burger:hover{border-color:var(--c-primary);background:rgba(15,191,160,.08)}

.nav-row{background:var(--c-bg);border-bottom:1px solid var(--c-line)}
.nav-scroll{display:flex;align-items:center;gap:6px;overflow-x:auto;scrollbar-width:none;-ms-overflow-style:none}
.nav-scroll::-webkit-scrollbar{display:none}
.nav-link{
  position:relative;display:inline-block;padding:15px 12px;font-size:15px;font-weight:600;
  color:var(--c-body);white-space:nowrap;transition:color .2s;
}
.nav-link:hover{color:var(--c-primary-press)}
.nav-link::after{content:"";position:absolute;left:12px;right:12px;bottom:0;height:3px;border-radius:3px 3px 0 0;background:transparent;transition:background .2s}
.nav-link.is-active{color:var(--c-primary-press)}
.nav-link.is-active::after{background:var(--c-primary)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:var(--r-btn);font-size:15px;font-weight:600;line-height:1;
  border:1px solid transparent;white-space:nowrap;
  transition:background .22s,color .22s,border-color .22s,transform .22s,box-shadow .22s;
}
.btn .arrow{transition:transform .22s cubic-bezier(.2,.7,.2,1)}
.btn:hover .arrow{transform:translateX(4px)}
.btn-sm{padding:10px 16px;font-size:14px}
.btn-primary{background:var(--c-primary);color:#062B24}
.btn-primary:hover{background:var(--c-primary-hover)}
.btn-primary:active{background:var(--c-primary-press)}
.btn-primary:disabled{background:var(--c-line);color:var(--c-muted);cursor:not-allowed}
.btn-ghost{background:#fff;border-color:rgba(18,22,27,.16);color:var(--c-ink)}
.btn-ghost:hover{background:var(--c-ink);border-color:var(--c-ink);color:#fff}
.btn-ghost:active{transform:translateY(1px)}
.btn-on-dark{background:transparent;border-color:rgba(255,255,255,.28);color:#fff}
.btn-on-dark:hover{background:#fff;color:var(--c-ink);border-color:#fff}

.text-link{display:inline-flex;align-items:center;gap:6px;color:var(--c-primary-press);font-weight:600;font-size:14px}
.text-link:hover{color:var(--c-primary-hover);text-decoration:underline;text-underline-offset:4px}

/* ---------- badges ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;padding:4px 11px;border-radius:var(--r-badge);
  font-size:13px;line-height:1.6;background:var(--c-bg);border:1px solid var(--c-line);color:var(--c-muted);
}
.badge-primary{background:rgba(15,191,160,.10);border-color:rgba(15,191,160,.34);color:#077B67}
.badge-accent{background:rgba(255,138,61,.12);border-color:rgba(255,138,61,.42);color:#B4530F}

/* ---------- hero ---------- */
.page-hero{position:relative;background:var(--c-ink);color:#fff;overflow:hidden;padding:60px 0 54px}
.hero-media{position:absolute;inset:0}
.hero-media img{width:100%;height:100%;object-fit:cover;opacity:.34}
.page-hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(112deg,rgba(18,22,27,.95) 0%,rgba(18,22,27,.80) 48%,rgba(18,22,27,.62) 100%);
}
.page-hero .container{position:relative;z-index:2}
.crumbs{display:flex;align-items:center;flex-wrap:wrap;gap:8px;font-size:13px;color:rgba(255,255,255,.62);margin-bottom:18px}
.crumbs a:hover{color:var(--c-primary)}
.crumbs .sep{opacity:.45}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-family:var(--mono);font-size:12px;letter-spacing:.16em;text-transform:uppercase;color:var(--c-primary)}
.page-hero h1{
  color:#fff;font-size:clamp(38px,5.6vw,64px);font-weight:800;line-height:1.08;letter-spacing:-.02em;
  margin:16px 0 18px;max-width:14em;
}
.hero-cursor{display:inline-block;width:3px;height:.82em;background:var(--c-primary);margin-left:8px;vertical-align:-.06em;animation:blink 1.1s steps(1) infinite}
@keyframes blink{0%,49%{opacity:1}50%,100%{opacity:0}}
.hero-sub{font-size:18px;line-height:1.7;color:rgba(255,255,255,.78);max-width:640px}
.hero-meta{display:flex;flex-wrap:wrap;gap:20px 44px;margin-top:34px;padding-top:24px;border-top:1px solid var(--c-line-dark)}
.hero-meta div{display:flex;flex-direction:column;gap:5px}
.hero-meta dt{font-size:11.5px;letter-spacing:.14em;color:rgba(255,255,255,.5)}
.hero-meta dd{margin:0;font-family:var(--mono);font-size:15px;color:#fff}

/* ---------- sections ---------- */
.section{padding:96px 0}
.section-alt{background:var(--c-surface)}
.section-head{max-width:760px;margin-bottom:44px}
.section-head h2{font-size:clamp(26px,3.2vw,40px);margin:14px 0 14px}
.section-head p{color:var(--c-muted);font-size:17px;line-height:1.75}
@media(max-width:640px){
  .section{padding:56px 0}
  .section-head{margin-bottom:30px}
}

/* ---------- path list ---------- */
.path-list{border-top:1px solid var(--c-line)}
.path-item{
  display:grid;grid-template-columns:auto 1fr;gap:26px;align-items:start;
  padding:28px 0;border-bottom:1px solid var(--c-line);transition:background .22s;
}
.path-num{font-family:var(--mono);font-size:26px;font-weight:700;color:var(--c-primary);line-height:1;padding-top:2px}
.path-item h3{font-size:20px;margin-bottom:8px}
.path-item p{color:var(--c-muted);font-size:16px;max-width:720px}
.path-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
@media(max-width:640px){
  .path-item{grid-template-columns:1fr;gap:10px}
  .path-num{font-size:20px}
}

/* ---------- card grid ---------- */
.cc-card{
  display:flex;flex-direction:column;background:var(--c-surface);
  border:1px solid var(--c-line);border-radius:var(--r-card);overflow:hidden;
  box-shadow:var(--sh-1);
  transition:transform .28s cubic-bezier(.2,.7,.2,1),box-shadow .28s,border-color .28s;
}
.cc-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:rgba(15,191,160,.42)}
.cc-cover{display:block;aspect-ratio:16/10;overflow:hidden;background:var(--c-bg)}
.cc-cover img{width:100%;height:100%;object-fit:cover;transition:transform .45s cubic-bezier(.2,.7,.2,1)}
.cc-card:hover .cc-cover img{transform:scale(1.04)}
.cc-body{display:flex;flex-direction:column;gap:10px;padding:20px 22px 22px;flex:1}
.cc-title{font-size:19px;line-height:1.42;font-weight:700}
.cc-title a:hover{color:var(--c-primary-press)}
.cc-desc{
  font-size:15px;color:var(--c-muted);line-height:1.7;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.cc-foot{
  margin-top:auto;padding-top:14px;border-top:1px dashed var(--c-line);
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  font-size:13px;color:var(--c-muted);font-family:var(--mono);
}

/* ---------- scene grid ---------- */
.scene-grid{display:grid;gap:20px}
@media(min-width:768px){.scene-grid{grid-template-columns:repeat(3,1fr)}}
.scene-card{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:26px 24px;transition:transform .26s,border-color .26s,box-shadow .26s;
}
.scene-card:hover{transform:translateY(-4px);border-color:rgba(15,191,160,.4);box-shadow:var(--sh-2)}
.scene-icon{
  display:inline-flex;align-items:center;justify-content:center;width:42px;height:42px;
  border-radius:11px;background:rgba(15,191,160,.12);color:var(--c-primary-press);margin-bottom:16px;
}
.scene-card h3{font-size:19px;margin-bottom:10px}
.scene-card p{color:var(--c-muted);font-size:15.5px;line-height:1.72}

/* ---------- flow ---------- */
.flow{display:grid;gap:18px}
@media(min-width:900px){.flow{grid-template-columns:repeat(4,1fr)}}
.flow-step{
  position:relative;background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:var(--r-card);padding:26px 22px 24px;transition:transform .26s,border-color .26s,box-shadow .26s;
}
.flow-step:hover{transform:translateY(-4px);border-color:rgba(15,191,160,.4);box-shadow:var(--sh-2)}
.flow-step .step-num{display:block;font-family:var(--mono);font-size:13px;letter-spacing:.18em;color:var(--c-primary);margin-bottom:14px}
.flow-step h3{font-size:18px;margin-bottom:10px}
.flow-step p{color:var(--c-muted);font-size:15px;line-height:1.72}
.flow-step::before{content:"";position:absolute;left:22px;right:22px;top:0;height:3px;border-radius:0 0 3px 3px;background:linear-gradient(90deg,var(--c-primary),rgba(15,191,160,.15))}

/* ---------- faq ---------- */
.faq-wrap{border-top:1px solid var(--c-line)}
.faq-item{position:relative;border-bottom:1px solid var(--c-line)}
.faq-item::before{content:"";position:absolute;left:0;top:22px;bottom:22px;width:3px;border-radius:3px;background:transparent;transition:background .24s}
.faq-item[open]::before{background:var(--c-primary)}
.faq-item summary{
  display:flex;align-items:flex-start;justify-content:space-between;gap:22px;
  padding:22px 6px 22px 18px;cursor:pointer;list-style:none;
  font-size:17px;font-weight:600;color:var(--c-ink);transition:color .2s;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--c-primary-press)}
.faq-item summary::after{
  content:"+";font-family:var(--mono);font-size:22px;line-height:1;color:var(--c-primary);
  flex:0 0 auto;transition:transform .25s;
}
.faq-item[open] summary{color:var(--c-primary-press)}
.faq-item[open] summary::after{content:"−"}
.faq-answer{padding:0 44px 26px 18px;color:var(--c-muted);font-size:16px;line-height:1.78;max-width:840px}
@media(max-width:640px){
  .faq-item summary{font-size:16px;padding:18px 4px 18px 14px}
  .faq-answer{padding:0 24px 22px 14px;font-size:15px}
}

/* ---------- cta bar ---------- */
.cta-bar{
  background:var(--c-ink);color:#fff;border-radius:18px;padding:38px 40px;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:26px;
  border:1px solid var(--c-line-dark);
}
.cta-bar h2{color:#fff;font-size:clamp(22px,2.4vw,30px);margin-bottom:10px}
.cta-bar p{color:rgba(255,255,255,.72);font-size:16px;max-width:620px}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}
@media(max-width:640px){.cta-bar{padding:28px 22px;border-radius:14px}}

/* ---------- footer ---------- */
.site-footer{background:var(--c-ink);color:rgba(255,255,255,.72);padding:70px 0 0;margin-top:0}
.footer-grid{display:grid;gap:38px;grid-template-columns:1fr}
@media(min-width:700px){.footer-grid{grid-template-columns:1fr 1fr}}
@media(min-width:1024px){.footer-grid{grid-template-columns:1.5fr 1fr 1fr 1fr}}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-size:17px;font-weight:800;margin-bottom:16px;letter-spacing:-.01em}
.site-footer .logo-badge{background:var(--c-primary);color:#062B24}
.footer-note{font-size:14.5px;line-height:1.85;max-width:360px;color:rgba(255,255,255,.68)}
.footer-col h3{color:#fff;font-size:14px;font-weight:700;letter-spacing:.06em;margin-bottom:16px}
.footer-col li+li{margin-top:10px}
.footer-col a{font-size:15px;color:rgba(255,255,255,.72);transition:color .2s}
.footer-col a:hover{color:var(--c-primary);text-decoration:underline;text-underline-offset:4px}
.footer-bottom{
  margin-top:54px;border-top:1px solid var(--c-line-dark);padding:22px 0 28px;
  display:flex;flex-wrap:wrap;gap:14px 26px;align-items:center;justify-content:space-between;
  font-family:var(--mono);font-size:13px;color:rgba(255,255,255,.6);
}
.to-top{color:rgba(255,255,255,.72);transition:color .2s}
.to-top:hover{color:var(--c-primary)}

/* ---------- drawer ---------- */
.drawer{position:fixed;inset:0;z-index:90;background:rgba(18,22,27,.52);opacity:0;visibility:hidden;transition:opacity .28s,visibility .28s}
.drawer.is-open{opacity:1;visibility:visible}
.drawer-panel{
  position:absolute;top:0;right:0;width:min(86vw,360px);height:100%;background:#fff;
  padding:22px 22px 32px;overflow-y:auto;display:flex;flex-direction:column;
  transform:translateX(100%);transition:transform .3s cubic-bezier(.2,.7,.2,1);
}
.drawer.is-open .drawer-panel{transform:none}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}
.drawer-title{font-size:13px;letter-spacing:.14em;font-family:var(--mono);color:var(--c-muted)}
.drawer-close{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;border:1px solid var(--c-line);border-radius:10px;color:var(--c-ink)}
.drawer-link{display:block;padding:14px 2px;font-size:16.5px;font-weight:600;color:var(--c-ink);border-bottom:1px solid var(--c-line)}
.drawer-link:hover{color:var(--c-primary-press)}
.drawer-link.is-active{color:var(--c-primary-press)}
.drawer-cta{margin-top:20px}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .32s cubic-bezier(.2,.7,.2,1),transform .32s cubic-bezier(.2,.7,.2,1)}
.reveal.is-in{opacity:1;transform:none}

@media(max-width:899px){
  .nav-row{display:none}
  .burger{display:inline-flex}
}
@media(max-width:639px){
  .search-box{display:none}
  .brand-name{font-size:15.5px;max-width:52vw}
}
@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important}
  .reveal{opacity:1;transform:none}
}