/* roulang page: index */
:root{
  --deep:#0C3B34;
  --brand:#0B8F6B;
  --brand-bright:#16BFA0;
  --mint:#6FE3BF;
  --grad:linear-gradient(135deg,#0B8F6B 0%,#16BFA0 48%,#6FE3BF 100%);
  --accent:#FF7A45;
  --bg:#F4F8F6;
  --surface:#E9F3EF;
  --card:#FFFFFF;
  --text:#12211D;
  --text-2:#5B6F69;
  --text-3:#8B9C96;
  --border:#DCE8E3;
  --danger:#D9534F;
  --r-sm:12px;
  --r-img:16px;
  --r-card:20px;
  --r-card-lg:24px;
  --r-pill:999px;
  --sh-1:0 10px 30px rgba(12,59,52,.08);
  --sh-2:0 18px 44px rgba(12,59,52,.14);
  --sec-y:88px;
  --pad-x:32px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:system-ui,-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;line-height:1.8;color:var(--text);background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{margin:0;color:var(--text);font-weight:700;line-height:1.3}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block;background:var(--surface)}
button{font-family:inherit}
h1{font-size:44px;line-height:1.25;font-weight:700}
h2{font-size:30px;line-height:1.3;font-weight:700}
h3{font-size:20px;line-height:1.4;font-weight:600}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 var(--pad-x)}
.section{padding:var(--sec-y) 0}
.section--tight{padding:64px 0}
.section--surface{background:var(--surface)}
.section--white{background:#fff}
.section-head{margin-bottom:44px;max-width:760px}
.section-head .eyebrow{display:inline-block;font-size:13px;font-weight:600;letter-spacing:.08em;color:var(--brand);background:var(--surface);border-radius:var(--r-pill);padding:5px 14px;margin-bottom:14px}
.section-head p{margin-top:14px;color:var(--text-2);font-size:16px}
.section-head--row{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;max-width:none}
.link-more{color:var(--brand-bright);font-weight:600;font-size:15px;display:inline-flex;align-items:center;gap:6px;white-space:nowrap}
.link-more:hover{text-decoration:underline}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;font-size:16px;font-weight:600;line-height:1;
  border-radius:var(--r-pill);border:1px solid transparent;cursor:pointer;
  transition:transform .22s ease,box-shadow .22s ease,background .22s ease,color .22s ease,filter .22s ease;
  text-align:center;
}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 8px 20px rgba(11,143,107,.28)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 26px rgba(11,143,107,.34);filter:brightness(1.05)}
.btn-primary:active{transform:translateY(0);box-shadow:0 4px 12px rgba(11,143,107,.3)}
.btn-outline{background:#fff;color:var(--brand);border-color:var(--brand);border-radius:14px}
.btn-outline:hover{transform:translateY(-2px);box-shadow:0 10px 24px rgba(12,59,52,.12)}
.btn-outline:active{transform:translateY(0);box-shadow:none}
.btn-ghost{background:transparent;color:var(--text-2)}
.btn-ghost:hover{color:var(--brand);background:var(--surface)}
.btn-sm{padding:10px 20px;font-size:14px}
.btn-lg{padding:15px 32px;font-size:16px}
.btn:focus-visible,a:focus-visible,summary:focus-visible,input:focus-visible{outline:3px solid rgba(23,195,162,.45);outline-offset:2px}

/* 顶部导航 */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(255,255,255,.96);
  border-bottom:1px solid var(--border);
  transition:box-shadow .22s ease;
}
.site-header.is-scrolled{box-shadow:0 6px 24px rgba(12,59,52,.09)}
.header-inner{display:flex;align-items:center;gap:20px;height:68px}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{
  width:36px;height:36px;border-radius:11px;background:var(--grad);
  display:grid;place-items:center;color:#fff;font-size:15px;flex-shrink:0;
  box-shadow:0 6px 14px rgba(11,143,107,.28);
}
.brand-text{font-size:17px;font-weight:700;letter-spacing:.01em;white-space:nowrap;color:var(--deep)}
.main-nav{margin-left:auto;display:flex;align-items:center;gap:4px}
.main-nav a{
  position:relative;padding:9px 14px;border-radius:var(--r-pill);
  font-size:15px;color:var(--text-2);transition:color .22s,background .22s;
}
.main-nav a::after{
  content:"";position:absolute;left:14px;right:14px;bottom:3px;height:2px;border-radius:2px;
  background:var(--grad);transform:scaleX(0);transform-origin:left;transition:transform .22s ease;
}
.main-nav a:hover{color:var(--deep);background:var(--surface)}
.main-nav a:hover::after{transform:scaleX(1)}
.main-nav a.active{color:var(--brand);font-weight:700;background:var(--surface)}
.main-nav a.active::after{transform:scaleX(1)}
.header-cta{flex-shrink:0}

/* Hero */
.hero{position:relative;overflow:hidden;padding:70px 0 78px;background:linear-gradient(180deg,#FFFFFF 0%,var(--bg) 100%)}
.hero::before{
  content:"";position:absolute;top:-160px;right:-140px;width:560px;height:560px;border-radius:50%;
  background:radial-gradient(circle,rgba(22,191,160,.12) 0%,rgba(22,191,160,0) 70%);
  pointer-events:none;
}
.hero-tag{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;color:var(--brand);
  background:var(--surface);border-radius:var(--r-pill);padding:6px 16px;margin-bottom:18px;
}
.hero h1{margin-bottom:18px;max-width:15em}
.hero-sub{font-size:17px;color:var(--text-2);margin-bottom:30px;max-width:30em}
.hero .btn-group{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:34px}
.badge-row{display:flex;flex-wrap:wrap;gap:12px}
.badge-row li{
  display:flex;align-items:baseline;gap:8px;
  background:var(--surface);border-radius:var(--r-pill);padding:8px 18px;
  font-size:13px;color:var(--text-2);
}
.badge-row li strong{font-size:20px;font-weight:700;letter-spacing:.02em;color:var(--deep)}
.badge-row li em{font-style:normal;color:var(--accent);font-weight:700}
.hero-visual{position:relative}
.hero-visual img{
  width:100%;border-radius:var(--r-card-lg);box-shadow:var(--sh-2);
  border:1px solid var(--border);object-fit:cover;aspect-ratio:4/3;
}
.hero-visual::after{
  content:"";position:absolute;left:-14px;bottom:-14px;width:96px;height:96px;border-radius:24px;
  background:var(--grad);opacity:.16;z-index:-1;
}
.hero-visual{margin-top:44px}

/* 功能卡片 */
.card-grid > .cell{margin-bottom:24px}
.feature-card{
  height:100%;background:var(--card);border:1px solid var(--border);
  border-radius:var(--r-card-lg);box-shadow:var(--sh-1);overflow:hidden;
  transition:transform .22s ease,box-shadow .22s ease;
  display:flex;flex-direction:column;
}
.feature-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2)}
.feature-card img{width:100%;aspect-ratio:16/10;object-fit:cover;border-bottom:1px solid var(--border)}
.feature-body{padding:28px;flex:1;display:flex;flex-direction:column}
.feature-body h3{margin-bottom:10px}
.feature-body p{font-size:15px;color:var(--text-2);line-height:1.8}
.feature-icon{
  width:44px;height:44px;border-radius:14px;background:var(--surface);color:var(--brand);
  display:grid;place-items:center;font-size:18px;margin-bottom:16px;
}

/* 截图轮播 */
.shot-wrap{position:relative}
.shot-track{
  display:flex;gap:20px;overflow-x:auto;padding:6px 4px 20px;
  scroll-snap-type:x mandatory;scrollbar-width:none;-webkit-overflow-scrolling:touch;
}
.shot-track::-webkit-scrollbar{display:none}
.shot-item{
  flex:0 0 38%;scroll-snap-align:start;
  background:#fff;border:1px solid var(--border);border-radius:var(--r-card);
  box-shadow:var(--sh-1);overflow:hidden;
}
.shot-item img{width:100%;aspect-ratio:16/10;object-fit:cover}
.shot-item figcaption{padding:16px 20px 20px;font-size:14px;color:var(--text-2)}
.shot-item strong{display:block;font-size:16px;color:var(--text);font-weight:600;margin-bottom:4px}
.shot-dots{display:flex;gap:8px;justify-content:center}
.shot-dots span{width:8px;height:8px;border-radius:50%;background:var(--border);transition:background .22s,width .22s}
.shot-dots span.on{background:var(--brand-bright);width:24px;border-radius:4px}

/* 系统要求 */
.spec-card{
  background:#fff;border:1px solid var(--border);border-radius:var(--r-card);
  padding:26px;height:100%;box-shadow:var(--sh-1);
  transition:transform .22s ease,box-shadow .22s ease;
}
.spec-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2)}
.spec-label{display:block;font-size:13px;color:var(--text-3);margin-bottom:8px}
.spec-card strong{display:block;font-size:18px;font-weight:700;color:var(--deep);line-height:1.5}
.spec-card p{margin-top:6px;font-size:14px;color:var(--text-2)}
.spec-rows{margin-top:8px;background:#fff;border:1px solid var(--border);border-radius:var(--r-card);overflow:hidden}
.spec-row{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:16px 28px;border-bottom:1px solid var(--border)}
.spec-row:last-child{border-bottom:none}
.spec-row span{color:var(--text-2);font-size:15px}
.spec-row strong{font-weight:600;color:var(--deep);text-align:right}

/* 评价墙 */
.review-wall{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.review-col{display:flex;flex-direction:column;gap:24px}
.review-col--offset{padding-top:44px}
.review-card{
  background:#fff;border:1px solid var(--border);border-radius:var(--r-card);
  padding:26px;box-shadow:var(--sh-1);transition:transform .22s ease,box-shadow .22s ease;
}
.review-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2)}
.review-top{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.avatar{
  width:44px;height:44px;border-radius:50%;background:var(--grad);color:#fff;
  display:grid;place-items:center;font-weight:700;font-size:16px;flex-shrink:0;
}
.review-name{font-weight:600;font-size:15px}
.review-stars{color:var(--accent);font-size:13px;letter-spacing:2px}
.review-card p{font-size:15px;color:var(--text-2);line-height:1.8}
.review-tag{
  display:inline-block;margin-top:14px;font-size:12px;color:var(--brand);
  background:var(--surface);border-radius:var(--r-pill);padding:4px 12px;
}

/* 下载区 */
.dl-band{
  background:var(--deep);border-radius:var(--r-card-lg);padding:56px 48px;
  color:#E9F3EF;position:relative;overflow:hidden;
}
.dl-band::before{
  content:"";position:absolute;top:-120px;left:-80px;width:420px;height:420px;border-radius:50%;
  background:radial-gradient(circle,rgba(22,191,160,.28) 0%,rgba(22,191,160,0) 70%);
}
.dl-band h2{color:#fff;margin-bottom:12px}
.dl-band p{color:rgba(233,243,239,.78);max-width:44em}
.dl-actions{display:flex;flex-wrap:wrap;gap:14px;margin:30px 0 26px;position:relative}
.dl-band .btn-outline{background:transparent;color:#fff;border-color:rgba(111,227,191,.6)}
.dl-band .btn-outline:hover{background:rgba(111,227,191,.12);border-color:var(--mint)}
.dl-band .btn-ghost{color:rgba(233,243,239,.8)}
.dl-band .btn-ghost:hover{background:rgba(111,227,191,.12);color:#fff}
.dl-badges{display:flex;flex-wrap:wrap;gap:12px;position:relative}
.dl-badges li{
  background:rgba(233,243,239,.12);border-radius:var(--r-pill);padding:7px 18px;
  font-size:13px;color:rgba(233,243,239,.9);
}
.dl-badges li strong{color:var(--mint);font-weight:700;font-size:16px;margin-right:6px}

/* 资讯列表 */
.news-wrap{display:grid;gap:20px}
.news-feature{
  background:#fff;border:1px solid var(--border);border-radius:var(--r-card-lg);
  box-shadow:var(--sh-1);overflow:hidden;transition:transform .22s ease,box-shadow .22s ease;
}
.news-feature:hover{transform:translateY(-4px);box-shadow:var(--sh-2)}
.news-feature a{display:grid;grid-template-columns:minmax(0,320px) minmax(0,1fr)}
.news-feature img{width:100%;height:100%;min-height:220px;object-fit:cover}
.news-feature-body{padding:32px}
.news-feature-body h3{margin:14px 0 12px;font-size:22px;line-height:1.45}
.news-feature-body p{color:var(--text-2);font-size:15px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-row{
  display:flex;align-items:center;gap:20px;background:#fff;border:1px solid var(--border);
  border-radius:var(--r);padding:20px 24px;box-shadow:var(--sh-1);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.news-row:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:#c6e2d8}
.news-row-main{flex:1;min-width:0}
.news-row h3{font-size:17px;font-weight:600;margin:8px 0 6px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.news-row p{font-size:14px;color:var(--text-2);display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden}
.news-row .arrow{color:var(--text-3);font-size:16px;flex-shrink:0;transition:transform .22s,color .22s}
.news-row:hover .arrow{color:var(--brand-bright);transform:translateX(4px)}
.tag{
  display:inline-block;font-size:12px;font-weight:600;color:var(--brand);
  background:var(--surface);border-radius:var(--r-pill);padding:3px 12px;
}
.tag--hot{background:var(--accent);color:#fff}
.meta{display:flex;align-items:center;gap:14px;font-size:13px;color:var(--text-3);margin-top:10px}
.news-empty{
  border:2px dashed var(--border);border-radius:var(--r-card);padding:52px 24px;text-align:center;
  color:var(--text-2);background:#fff;
}
.news-empty i{font-size:28px;color:var(--brand-bright);display:block;margin-bottom:12px}

/* FAQ */
.faq-list{display:grid;gap:14px}
.faq-item{
  position:relative;background:#fff;border:1px solid var(--border);border-radius:var(--r);
  box-shadow:var(--sh-1);overflow:hidden;transition:box-shadow .22s ease,border-color .22s ease;
}
.faq-item::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:var(--grad);
  transform:scaleY(0);transform-origin:top;transition:transform .22s ease;
}
.faq-item[open]{box-shadow:var(--sh-2);border-color:#c6e2d8}
.faq-item[open]::before{transform:scaleY(1)}
.faq-item summary{
  cursor:pointer;list-style:none;padding:20px 26px;font-size:17px;font-weight:600;
  display:flex;align-items:center;justify-content:space-between;gap:18px;color:var(--text);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary .ico{
  flex-shrink:0;width:26px;height:26px;border-radius:50%;background:var(--surface);color:var(--brand);
  display:grid;place-items:center;font-size:12px;transition:transform .22s ease,background .22s ease,color .22s ease;
}
.faq-item[open] summary .ico{transform:rotate(180deg);background:var(--grad);color:#fff}
.faq-answer{padding:0 26px 22px;font-size:15px;line-height:1.85;color:var(--text-2);background:#F4F8F6;margin-top:0;padding-top:16px}
.faq-item summary{background:#fff}

/* 底部 CTA 条 */
.cta-band{background:var(--grad);color:#fff;padding:56px 0}
.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap}
.cta-inner h2{color:#fff;margin-bottom:10px}
.cta-inner p{color:rgba(255,255,255,.9);font-size:15px}
.cta-band .btn{background:#fff;color:var(--brand);box-shadow:0 10px 26px rgba(0,0,0,.16)}
.cta-band .btn:hover{transform:translateY(-2px);box-shadow:0 16px 34px rgba(0,0,0,.2);filter:none}

/* 页脚 */
.site-footer{background:var(--deep);color:#E9F3EF;padding:64px 0 32px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand .brand-text{color:#fff}
.footer-brand .brand-mark{box-shadow:none}
.footer-desc{font-size:14px;line-height:1.85;color:rgba(233,243,239,.72);max-width:32em}
.footer-col h4{font-size:15px;color:#fff;margin-bottom:16px;font-weight:600}
.footer-col a,.footer-col li{display:block;font-size:14px;color:rgba(233,243,239,.72);line-height:2.1;transition:color .22s}
.footer-col a:hover{color:var(--mint)}
.footer-bottom{
  margin-top:48px;padding-top:24px;border-top:1px solid rgba(233,243,239,.16);
  display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;
  font-size:13px;color:rgba(233,243,239,.58);
}

/* 移动端底部 Tab */
.mobile-tab{display:none}
@media (max-width:767px){
  .mobile-tab{
    display:flex;position:fixed;left:0;right:0;bottom:0;z-index:80;
    height:60px;padding-bottom:env(safe-area-inset-bottom);
    background:rgba(255,255,255,.96);border-top:1px solid var(--border);
    backdrop-filter:blur(8px);
  }
  .mobile-tab a{
    flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;
    font-size:10px;color:var(--text-3);position:relative;transition:color .22s;
  }
  .mobile-tab a i{font-size:19px}
  .mobile-tab a.active{color:var(--brand);font-weight:600}
  .mobile-tab a.active::before{
    content:"";position:absolute;top:0;left:50%;transform:translateX(-50%);
    width:26px;height:3px;border-radius:0 0 3px 3px;background:var(--grad);
  }
  body{padding-bottom:76px}
}

/* 响应式 */
@media (max-width:1023px){
  :root{--sec-y:64px;--pad-x:24px}
  h1{font-size:34px}
  h2{font-size:26px}
  .main-nav a{padding:8px 10px;font-size:14px}
  .hot-feature .feature-body,.news-feature-body{padding:24px}
  .dl-band{padding:40px 28px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .shot-item{flex:0 0 46%}
}
@media (max-width:767px){
  :root{--sec-y:48px;--pad-x:18px}
  h1{font-size:28px}
  h2{font-size:22px}
  body{font-size:15px}
  .brand-text{font-size:14px;max-width:11em;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
  .main-nav{display:none}
  .header-cta{margin-left:auto}
  .hero{padding:40px 0 48px}
  .hero-sub{font-size:15px}
  .hero .btn-group{gap:10px}
  .hero .btn-group .btn{flex:1 1 auto;padding:12px 18px;font-size:15px}
  .badge-row{gap:8px}
  .badge-row li{padding:6px 14px;font-size:12px}
  .badge-row li strong{font-size:17px}
  .hero-visual{margin-top:32px}
  .feature-body{padding:20px}
  .shot-item{flex:0 0 82%}
  .review-wall{grid-template-columns:1fr;gap:14px}
  .review-col{gap:14px}
  .review-col--offset{padding-top:0}
  .review-card{padding:20px}
  .news-feature a{grid-template-columns:1fr}
  .news-feature img{min-height:180px;aspect-ratio:16/9}
  .news-fefeature-body{padding:20px}
  .news-feature-body{padding:20px}
  .news-row{padding:16px 18px;gap:14px}
  .news-row h3{font-size:16px;white-space:normal;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical}
  .spec-row{padding:14px 18px;flex-direction:column;align-items:flex-start;gap:4px}
  .spec-row strong{text-align:left}
  .spec-card{padding:20px}
  .dl-band{padding:32px 20px;border-radius:var(--r-card)}
  .dl-actions .btn{width:100%}
  .faq-item summary{padding:16px 18px;font-size:16px}
  .faq-answer{padding:0 18px 18px;padding-top:14px}
  .cta-inner{flex-direction:column;align-items:flex-start;gap:20px}
  .cta-band{padding:40px 0}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column;gap:8px;padding-bottom:8px}
  .section-head--row{flex-direction:column;align-items:flex-start;gap:12px}
  .card-grid > .cell{margin-bottom:14px}
}

/* roulang page: article */
:root{
  --ink:#0C3B34;
  --brand:#16BFA0;
  --brand-dark:#0B8F6B;
  --brand-light:#6FE3BF;
  --accent:#FF7A45;
  --bg:#F4F8F6;
  --surface:#E9F3EF;
  --card:#FFFFFF;
  --text:#12211D;
  --muted:#5B6F69;
  --faint:#8B9C96;
  --border:#DCE8E3;
  --grad:linear-gradient(135deg,#0B8F6B 0%,#16BFA0 48%,#6FE3BF 100%);
  --radius-card:20px;
  --radius-lg:24px;
  --radius-pill:999px;
  --radius-img:16px;
  --shadow:0 10px 30px rgba(12,59,52,.08);
  --shadow-hover:0 18px 44px rgba(12,59,52,.14);
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:system-ui,-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-style:none}
a{color:inherit;text-decoration:none;background-color:transparent}
button,input,select,textarea{font:inherit;color:inherit}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{padding:0}
:focus-visible{outline:3px solid rgba(23,195,162,.45);outline-offset:2px;border-radius:6px}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 32px}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:#fff;border-bottom:1px solid var(--border);
  transition:box-shadow .25s ease;
}
.site-header.is-scrolled{box-shadow:0 6px 24px rgba(12,59,52,.08)}
.header-inner{display:flex;align-items:center;gap:20px;height:68px}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{
  width:34px;height:34px;border-radius:11px;background:var(--grad);
  color:#fff;display:grid;place-items:center;font-size:15px;flex-shrink:0;
  box-shadow:0 6px 16px rgba(22,191,160,.35);
}
.brand-text{font-size:16px;font-weight:700;color:var(--ink);white-space:nowrap;letter-spacing:.01em}
.main-nav{display:flex;align-items:center;gap:4px;margin:0 auto}
.main-nav a{
  position:relative;padding:9px 14px;font-size:15px;color:var(--muted);
  border-radius:10px;transition:color .2s ease,background .2s ease;
}
.main-nav a:hover{color:var(--ink);background:var(--surface)}
.main-nav a.active{color:var(--ink);font-weight:700}
.main-nav a.active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;height:3px;
  border-radius:3px;background:var(--grad);
}
.header-cta{flex-shrink:0}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-size:15px;font-weight:600;line-height:1;padding:13px 24px;
  border-radius:var(--radius-pill);border:1px solid transparent;cursor:pointer;
  transition:transform .2s ease,box-shadow .22s ease,filter .22s ease,background .2s ease,color .2s ease,border-color .2s ease;
}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 10px 24px rgba(22,191,160,.28)}
.btn-primary:hover{filter:brightness(1.06);transform:translateY(-2px);box-shadow:0 16px 30px rgba(22,191,160,.34);color:#fff}
.btn-primary:active{transform:translateY(0);box-shadow:0 6px 14px rgba(22,191,160,.26)}
.btn-outline{background:#fff;color:var(--brand-dark);border-color:rgba(22,191,160,.45)}
.btn-outline:hover{transform:translateY(-2px);border-color:var(--brand);color:var(--ink);box-shadow:var(--shadow)}
.btn-outline:active{transform:translateY(0);box-shadow:none}
.btn-ghost{background:transparent;color:var(--muted);border-color:transparent}
.btn-ghost:hover{color:var(--ink);background:var(--surface)}
.btn-sm{padding:10px 18px;font-size:14px}
.btn-lg{padding:16px 30px;font-size:16px}

/* ---------- breadcrumb ---------- */
.breadcrumb{background:#fff;border-bottom:1px solid var(--border)}
.breadcrumb .container{display:flex;align-items:center;gap:10px;height:52px;font-size:13px;color:var(--faint)}
.breadcrumb a{color:var(--muted);transition:color .2s ease}
.breadcrumb a:hover{color:var(--brand-dark)}
.breadcrumb .crumb-sep{color:#C3D3CD}
.breadcrumb .crumb-current{
  color:var(--ink);font-weight:600;max-width:420px;white-space:nowrap;
  overflow:hidden;text-overflow:ellipsis;
}
.breadcrumb .crumb-cat{color:var(--brand-dark);font-weight:600}

/* ---------- article hero ---------- */
.article-hero{
  position:relative;overflow:hidden;
  background:linear-gradient(180deg,#EAF6F1 0%,#F4F8F6 100%);
  border-bottom:1px solid var(--border);
  padding:56px 0 52px;
}
.article-hero::after{
  content:"";position:absolute;top:-120px;right:-90px;width:420px;height:420px;
  border-radius:50%;background:var(--grad);opacity:.10;filter:blur(10px);pointer-events:none;
}
.article-hero-inner{position:relative;z-index:1;max-width:860px}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:6px 14px;border-radius:var(--radius-pill);
  background:#fff;color:var(--brand-dark);font-size:13px;font-weight:600;
  border:1px solid rgba(22,191,160,.35);
}
.article-title{
  margin:18px 0 18px;font-size:40px;line-height:1.3;font-weight:700;color:var(--ink);
  letter-spacing:.005em;
}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px 22px;font-size:13px;color:var(--muted)}
.article-meta span{display:inline-flex;align-items:center;gap:7px}
.article-meta i{color:var(--brand)}
.article-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}

/* ---------- article body ---------- */
.article-body{padding:64px 0 20px}
.article-shell{max-width:840px;margin:0 auto}
.paper{
  background:var(--card);border:1px solid var(--border);border-radius:var(--radius-lg);
  box-shadow:var(--shadow);padding:48px 52px;
}
.prose{font-size:17px;line-height:1.9;color:#1B2C27;word-wrap:break-word;overflow-wrap:break-word}
.prose > *:first-child{margin-top:0}
.prose h2{
  margin:46px 0 18px;font-size:26px;line-height:1.4;font-weight:700;color:var(--ink);
  padding-left:14px;border-left:4px solid var(--brand);border-radius:2px;
}
.prose h3{margin:32px 0 12px;font-size:20px;line-height:1.45;font-weight:600;color:var(--ink)}
.prose h4{margin:24px 0 10px;font-size:17px;font-weight:600;color:var(--ink)}
.prose p{margin:0 0 18px}
.prose ul,.prose ol{margin:0 0 20px;padding-left:24px}
.prose ul{list-style:disc}
.prose ol{list-style:decimal}
.prose li{margin-bottom:8px}
.prose li::marker{color:var(--brand)}
.prose a{color:var(--brand-dark);text-decoration:underline;text-underline-offset:3px;transition:color .2s ease}
.prose a:hover{color:var(--ink)}
.prose strong{color:var(--ink);font-weight:700}
.prose blockquote{
  margin:26px 0;padding:18px 22px;background:var(--surface);color:#2C4A42;
  border-left:4px solid var(--brand);border-radius:0 14px 14px 0;
}
.prose blockquote p:last-child{margin-bottom:0}
.prose pre{
  margin:24px 0;padding:18px 20px;background:#0C3B34;color:#D8F3EA;
  border-radius:14px;font-size:14px;line-height:1.7;overflow-x:auto;
}
.prose code{
  font-family:ui-monospace,Menlo,Consolas,monospace;font-size:.92em;
  background:var(--surface);color:#0B6B53;padding:2px 6px;border-radius:6px;
}
.prose pre code{background:none;color:inherit;padding:0}
.prose img{border-radius:var(--radius-img);border:1px solid var(--border);margin:22px auto}
.prose figure{margin:26px 0}
.prose figcaption{margin-top:10px;font-size:13px;color:var(--faint);text-align:center}
.prose table{
  width:100%;border-collapse:collapse;margin:24px 0;font-size:15px;
  display:block;overflow-x:auto;
}
.prose th,.prose td{border:1px solid var(--border);padding:12px 14px;text-align:left}
.prose th{background:var(--surface);color:var(--ink);font-weight:600}
.prose hr{border:none;border-top:1px solid var(--border);margin:36px 0}
.prose-end{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px;
  margin-top:40px;padding-top:24px;border-top:1px dashed var(--border);
  font-size:13px;color:var(--faint);
}
.empty-state{text-align:center;padding:40px 20px}
.empty-state i{font-size:42px;color:var(--brand-light)}
.empty-state h2{margin:18px 0 10px;font-size:24px;font-weight:700;color:var(--ink);border:none;padding:0}
.empty-state p{margin:0 0 24px;color:var(--muted);font-size:15px}

/* ---------- prev / next ---------- */
.post-nav{max-width:840px;margin:34px auto 0;display:grid;grid-template-columns:1fr 1fr;gap:20px}
.post-nav a{
  display:flex;flex-direction:column;gap:6px;padding:20px 24px;background:#fff;
  border:1px solid var(--border);border-radius:var(--radius-card);box-shadow:var(--shadow);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.post-nav a:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:rgba(22,191,160,.4)}
.post-nav .pn-label{font-size:12px;color:var(--faint);display:flex;align-items:center;gap:6px}
.post-nav .pn-title{font-size:15px;font-weight:600;color:var(--ink)}
.post-nav .pn-next{align-items:flex-end;text-align:right}
.back-cat{
  max-width:840px;margin:20px auto 0;display:flex;justify-content:center;
}

/* ---------- related ---------- */
.related{padding:72px 0 0}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:14px;margin-bottom:28px}
.section-head h2{font-size:28px;line-height:1.3;font-weight:700;color:var(--ink)}
.section-head p{margin-top:8px;font-size:14px;color:var(--muted)}
.section-more{font-size:14px;font-weight:600;color:var(--brand-dark);display:inline-flex;align-items:center;gap:6px;transition:gap .2s ease,color .2s ease}
.section-more:hover{gap:10px;color:var(--ink)}
.rel-card{
  display:flex;flex-direction:column;height:100%;background:#fff;border:1px solid var(--border);
  border-radius:var(--radius-card);overflow:hidden;box-shadow:var(--shadow);
  transition:transform .22s ease,box-shadow .22s ease;
}
.rel-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}
.rel-card .rel-thumb{position:relative;background:var(--surface)}
.rel-card .rel-thumb img{width:100%;height:100%;object-fit:cover;aspect-ratio:16/10;border:none;border-radius:0}
.rel-body{padding:22px 24px 24px;display:flex;flex-direction:column;gap:10px;flex:1}
.rel-card .chip{
  align-self:flex-start;padding:4px 12px;border-radius:var(--radius-pill);
  background:var(--surface);color:var(--brand-dark);font-size:12px;font-weight:600;
}
.rel-card h3{font-size:18px;line-height:1.5;font-weight:600;color:var(--ink)}
.rel-card p{font-size:14px;color:var(--muted);line-height:1.75}
.rel-meta{margin-top:auto;display:flex;align-items:center;justify-content:space-between;font-size:12px;color:var(--faint)}
.rel-meta i{color:var(--brand)}
.rel-wide{flex-direction:row;align-items:stretch}
.rel-wide .rel-thumb{flex:0 0 44%;max-width:44%}
.rel-wide .rel-thumb img{height:100%;aspect-ratio:auto;min-height:240px}
.rel-wide .rel-body{padding:28px 30px}
.rel-wide h3{font-size:22px}
.rel-wide p{font-size:15px}

/* ---------- cta band ---------- */
.cta-band{margin-top:80px;background:var(--grad);color:#fff;padding:56px 0}
.cta-inner{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:26px}
.cta-inner h2{font-size:28px;line-height:1.35;font-weight:700;color:#fff}
.cta-inner p{margin-top:10px;font-size:15px;color:rgba(255,255,255,.9);max-width:620px}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px}
.cta-band .btn-outline{background:rgba(255,255,255,.14);color:#fff;border-color:rgba(255,255,255,.6)}
.cta-band .btn-outline:hover{background:#fff;color:var(--ink);border-color:#fff}
.cta-band .btn-primary{background:#fff;color:var(--brand-dark);box-shadow:0 10px 24px rgba(0,0,0,.14)}
.cta-band .btn-primary:hover{color:var(--ink)}

/* ---------- footer ---------- */
.site-footer{background:var(--ink);color:#E9F3EF;padding:64px 0 30px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1.1fr 1fr;gap:40px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand .brand-text{color:#fff;font-size:16px;font-weight:700}
.footer-desc{font-size:13.5px;line-height:1.85;color:rgba(233,243,239,.68);max-width:340px}
.footer-col h4{font-size:15px;font-weight:600;color:#fff;margin-bottom:16px}
.footer-col a{display:block;font-size:13.5px;color:rgba(233,243,239,.68);padding:6px 0;transition:color .2s ease,transform .2s ease}
.footer-col a:hover{color:var(--brand-light);transform:translateX(3px)}
.footer-bottom{
  margin-top:44px;padding-top:22px;border-top:1px solid rgba(233,243,239,.14);
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;
  font-size:12.5px;color:rgba(233,243,239,.55);
}

/* ---------- mobile tab ---------- */
.mobile-tab{
  position:fixed;left:0;right:0;bottom:0;z-index:90;display:none;
  background:rgba(255,255,255,.96);border-top:1px solid var(--border);
  padding-bottom:env(safe-area-inset-bottom);
  box-shadow:0 -6px 20px rgba(12,59,52,.08);
}
.mobile-tab-inner{display:grid;grid-template-columns:repeat(5,1fr);height:60px}
.mobile-tab a{
  position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;
  font-size:10px;color:var(--faint);transition:color .2s ease;
}
.mobile-tab a i{font-size:18px}
.mobile-tab a.active{color:var(--brand-dark);font-weight:600}
.mobile-tab a.active::before{
  content:"";position:absolute;top:0;left:50%;transform:translateX(-50%);
  width:26px;height:3px;border-radius:0 0 3px 3px;background:var(--grad);
}

/* ---------- toast ---------- */
.copy-tip{
  position:fixed;left:50%;bottom:96px;transform:translate(-50%,12px);
  background:var(--ink);color:#fff;font-size:13px;padding:10px 18px;border-radius:var(--radius-pill);
  opacity:0;pointer-events:none;transition:opacity .25s ease,transform .25s ease;z-index:100;
}
.copy-tip.show{opacity:1;transform:translate(-50%,0)}

/* ---------- responsive ---------- */
@media(max-width:1023px){
  .article-title{font-size:32px}
  .paper{padding:38px 32px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media(max-width:767px){
  .container{padding:0 18px}
  .main-nav{display:none}
  .header-cta{margin-left:auto}
  .brand-text{font-size:14px}
  body{padding-bottom:76px}
  .mobile-tab{display:block}
  .article-hero{padding:36px 0 34px}
  .article-title{font-size:28px}
  .article-body{padding:36px 0 10px}
  .paper{padding:26px 20px;border-radius:18px}
  .prose{font-size:16.5px}
  .prose h2{font-size:22px;margin:34px 0 14px}
  .prose h3{font-size:18px}
  .post-nav{grid-template-columns:1fr}
  .post-nav .pn-next{align-items:flex-start;text-align:left}
  .related{padding:48px 0 0}
  .section-head h2{font-size:22px}
  .rel-wide{flex-direction:column}
  .rel-wide .rel-thumb{flex:none;max-width:100%}
  .rel-wide .rel-thumb img{min-height:0;aspect-ratio:16/10}
  .rel-wide .rel-body{padding:22px 20px}
  .cta-band{padding:42px 0;margin-top:52px}
  .cta-inner h2{font-size:22px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column}
  .breadcrumb .crumb-current{max-width:180px}
}
@media(max-width:479px){
  .article-title{font-size:26px}
  .cta-actions{width:100%}
  .cta-actions .btn{flex:1}
}

/* roulang page: category1 */
:root{
  --ink:#0C3B34;
  --brand:#16BFA0;
  --brand-deep:#0B8F6B;
  --brand-soft:#6FE3BF;
  --brand-grad:linear-gradient(135deg,#0B8F6B 0%,#16BFA0 48%,#6FE3BF 100%);
  --accent:#FF7A45;
  --bg:#F4F8F6;
  --surface:#E9F3EF;
  --card:#FFFFFF;
  --text:#12211D;
  --muted:#5B6F69;
  --faint:#8B9C96;
  --border:#DCE8E3;
  --radius-s:12px;
  --radius-m:16px;
  --radius-l:20px;
  --radius-xl:24px;
  --shadow-s:0 4px 14px rgba(12,59,52,.06);
  --shadow-m:0 10px 30px rgba(12,59,52,.08);
  --shadow-l:0 18px 44px rgba(12,59,52,.14);
  --ease:220ms ease;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:system-ui,-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;line-height:1.8;color:var(--text);background:var(--bg);
  -webkit-font-smoothing:antialiased;
  padding-bottom:0;
}
img{max-width:100%;display:block;border-style:none;}
a{color:inherit;text-decoration:none;transition:color var(--ease);}
a:hover{color:var(--brand-deep);}
button,input,textarea,select{font-family:inherit;font-size:inherit;}
h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0;padding:0;}
ul,ol{list-style:none;}
h1{font-size:44px;line-height:1.25;font-weight:700;letter-spacing:-.01em;}
h2{font-size:30px;line-height:1.3;font-weight:700;}
h3{font-size:20px;line-height:1.4;font-weight:600;}
p{font-size:16px;line-height:1.8;color:var(--muted);}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px;}
.section{padding:88px 0;}
.section-tight{padding:64px 0;}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;color:var(--brand-deep);background:var(--surface);border-radius:999px;padding:6px 14px;letter-spacing:.02em;}
.sec-head{max-width:760px;margin-bottom:44px;}
.sec-head h2{margin:16px 0 14px;}
.sec-head p{font-size:16px;color:var(--muted);}
:focus-visible{outline:3px solid rgba(23,195,162,.45);outline-offset:2px;border-radius:6px;}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;background:#fff;border-bottom:1px solid var(--border);
  transition:box-shadow var(--ease);
}
.site-header.is-scrolled{box-shadow:0 8px 24px rgba(12,59,52,.08);}
.header-inner{display:flex;align-items:center;gap:24px;height:68px;}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand-mark{
  width:34px;height:34px;border-radius:10px;background:var(--brand-grad);
  display:inline-flex;align-items:center;justify-content:center;color:#fff;font-size:15px;
  box-shadow:0 6px 16px rgba(22,191,160,.35);
}
.brand-text{font-size:16px;font-weight:700;color:var(--ink);letter-spacing:.01em;white-space:nowrap;}
.main-nav{display:flex;align-items:center;gap:6px;margin:0 auto;}
.main-nav a{
  position:relative;font-size:15px;font-weight:500;color:var(--muted);
  padding:10px 14px;border-radius:10px;white-space:nowrap;
}
.main-nav a::after{
  content:"";position:absolute;left:14px;right:14px;bottom:4px;height:3px;border-radius:3px;
  background:var(--brand-grad);transform:scaleX(0);transform-origin:left;transition:transform var(--ease);
}
.main-nav a:hover{color:var(--ink);}
.main-nav a:hover::after{transform:scaleX(1);}
.main-nav a.active{color:var(--brand-deep);font-weight:700;}
.main-nav a.active::after{transform:scaleX(1);}
.header-cta{flex:0 0 auto;}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border:none;cursor:pointer;font-weight:600;font-size:16px;line-height:1;
  padding:15px 30px;border-radius:999px;transition:all var(--ease);white-space:nowrap;
}
.btn-sm{padding:11px 22px;font-size:15px;}
.btn-primary{background:var(--brand-grad);color:#fff;box-shadow:0 10px 24px rgba(22,191,160,.28);}
.btn-primary:hover{color:#fff;filter:brightness(1.06);transform:translateY(-2px);box-shadow:0 14px 30px rgba(22,191,160,.34);}
.btn-primary:active{transform:translateY(0);box-shadow:0 6px 14px rgba(22,191,160,.3);}
.btn-secondary{background:#fff;color:var(--brand-deep);border:1px solid var(--brand);border-radius:14px;}
.btn-secondary:hover{color:var(--brand-deep);background:var(--surface);transform:translateY(-2px);}
.btn-secondary:active{transform:translateY(0);}
.btn-ghost{background:transparent;color:var(--muted);padding:12px 8px;}
.btn-ghost:hover{color:var(--brand-deep);}
.btn-block{width:100%;}

/* ---------- page hero (分类横幅) ---------- */
.page-hero{
  position:relative;overflow:hidden;
  background-image:linear-gradient(115deg,rgba(12,59,52,.93) 0%,rgba(11,143,107,.86) 52%,rgba(22,191,160,.62) 100%),url("/assets/images/backpic/back-1.png");
  background-size:cover;background-position:center;
  padding:72px 0 84px;color:#fff;
}
.page-hero::after{
  content:"";position:absolute;right:-120px;top:-120px;width:420px;height:420px;border-radius:50%;
  background:radial-gradient(circle,rgba(111,227,191,.35),transparent 68%);pointer-events:none;
}
.page-hero .container{position:relative;z-index:2;}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:rgba(233,243,239,.78);margin-bottom:22px;}
.crumbs a{color:rgba(233,243,239,.9);}
.crumbs a:hover{color:#fff;}
.crumbs span.sep{opacity:.55;}
.crumbs .current{color:#fff;font-weight:600;}
.page-hero h1{color:#fff;max-width:860px;}
.page-hero .lead{margin-top:18px;font-size:17px;line-height:1.85;color:rgba(240,252,248,.9);max-width:760px;}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px;}
.hero-tags span{
  display:inline-flex;align-items:center;gap:7px;font-size:13px;font-weight:600;
  background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.24);
  color:#fff;border-radius:999px;padding:7px 14px;backdrop-filter:none;
}
.hero-tags span i{color:var(--brand-soft);}

/* ---------- 徽章 ---------- */
.badge-row{display:flex;flex-wrap:wrap;gap:12px;}
.badge{
  display:inline-flex;align-items:baseline;gap:6px;background:var(--surface);color:var(--ink);
  border-radius:999px;padding:9px 16px;font-size:13px;font-weight:600;
}
.badge b{font-size:20px;font-weight:700;letter-spacing:.02em;color:var(--brand-deep);}
.badge i{font-size:12px;color:var(--brand-deep);}
.mark-new{background:var(--accent);color:#fff;font-size:12px;font-weight:700;border-radius:999px;padding:3px 10px;}

/* ---------- 步骤时间线 ---------- */
.timeline{position:relative;max-width:900px;margin:0 auto;padding-left:0;}
.timeline::before{
  content:"";position:absolute;left:27px;top:12px;bottom:12px;width:2px;
  background:linear-gradient(180deg,var(--brand) 0%,var(--brand-soft) 60%,rgba(220,232,227,0) 100%);
}
.step{position:relative;display:flex;gap:26px;padding:0 0 34px 0;}
.step:last-child{padding-bottom:0;}
.step-num{
  position:relative;z-index:2;flex:0 0 auto;width:56px;height:56px;border-radius:50%;
  background:#fff;border:2px solid var(--border);color:var(--brand-deep);
  display:flex;align-items:center;justify-content:center;font-size:19px;font-weight:700;
  box-shadow:var(--shadow-s);transition:all var(--ease);
}
.step:hover .step-num{border-color:var(--brand);color:#fff;background:var(--brand-grad);box-shadow:0 12px 26px rgba(22,191,160,.3);}
.step-body{
  flex:1 1 auto;background:var(--card);border:1px solid var(--border);border-radius:var(--radius-l);
  padding:26px 28px;box-shadow:var(--shadow-m);transition:transform var(--ease),box-shadow var(--ease);
}
.step:hover .step-body{transform:translateY(-4px);box-shadow:var(--shadow-l);}
.step-body h3{margin-bottom:10px;color:var(--ink);}
.step-body p{font-size:15px;line-height:1.85;}
.step-list{margin-top:14px;display:grid;gap:8px;}
.step-list li{position:relative;padding-left:22px;font-size:15px;color:var(--muted);line-height:1.75;}
.step-list li::before{
  content:"";position:absolute;left:2px;top:11px;width:8px;height:8px;border-radius:50%;
  background:var(--brand-grad);
}
.step-meta{margin-top:16px;display:flex;flex-wrap:wrap;gap:8px;}

/* ---------- 规格卡 ---------- */
.spec-wrap{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;}
.spec-card{
  background:var(--card);border:1px solid var(--border);border-radius:var(--radius-xl);
  padding:28px;box-shadow:var(--shadow-m);transition:transform var(--ease),box-shadow var(--ease);
}
.spec-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-l);}
.spec-head{display:flex;align-items:center;gap:12px;margin-bottom:18px;}
.spec-icon{
  width:42px;height:42px;border-radius:14px;background:var(--surface);color:var(--brand-deep);
  display:inline-flex;align-items:center;justify-content:center;font-size:17px;
}
.spec-head h3{font-size:19px;color:var(--ink);}
.spec-row{
  display:flex;justify-content:space-between;align-items:baseline;gap:16px;
  padding:13px 0;border-bottom:1px dashed var(--border);font-size:15px;
}
.spec-row:last-child{border-bottom:none;}
.spec-row .k{color:var(--faint);font-size:14px;flex:0 0 auto;}
.spec-row .v{color:var(--text);font-weight:600;text-align:right;}
.spec-row .v em{font-style:normal;font-size:12px;color:var(--faint);font-weight:500;}

/* ---------- 图文区块 ---------- */
.split{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center;}
.split.reverse .split-media{order:2;}
.split-media img{
  width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:var(--radius-m);
  border:1px solid var(--border);box-shadow:var(--shadow-m);background:var(--surface);
}
.split-text h2{margin:16px 0 16px;}
.split-text p{font-size:16px;}
.check-list{margin-top:22px;display:grid;gap:14px;}
.check-list li{display:flex;gap:12px;align-items:flex-start;font-size:15px;color:var(--text);line-height:1.75;}
.check-list li i{
  flex:0 0 auto;width:22px;height:22px;border-radius:50%;background:var(--surface);color:var(--brand-deep);
  display:inline-flex;align-items:center;justify-content:center;font-size:11px;margin-top:3px;
}
.check-list li span{color:var(--muted);}

/* ---------- 卡片网格 ---------- */
.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
.info-card{
  background:var(--card);border:1px solid var(--border);border-radius:var(--radius-l);
  padding:28px;box-shadow:var(--shadow-m);transition:transform var(--ease),box-shadow var(--ease);
}
.info-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-l);}
.info-card .tag{display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:600;color:var(--brand-deep);background:var(--surface);border-radius:999px;padding:4px 12px;margin-bottom:16px;}
.info-card h3{font-size:18px;margin-bottom:10px;color:var(--ink);}
.info-card p{font-size:15px;line-height:1.8;}
.info-card .fix{margin-top:14px;font-size:14px;color:var(--brand-deep);background:var(--bg);border-left:3px solid var(--brand);border-radius:0 10px 10px 0;padding:10px 14px;line-height:1.7;}

/* ---------- 深色带 ---------- */
.band-dark{
  background:var(--ink);color:#fff;border-radius:0;
  padding:72px 0;position:relative;overflow:hidden;
}
.band-dark::before{
  content:"";position:absolute;left:-140px;bottom:-160px;width:420px;height:420px;border-radius:50%;
  background:radial-gradient(circle,rgba(22,191,160,.32),transparent 70%);
}
.band-dark h2{color:#fff;margin-bottom:16px;}
.band-dark p{color:rgba(233,243,239,.82);}
.dark-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px;margin-top:38px;position:relative;z-index:2;}
.dark-item{background:rgba(255,255,255,.06);border:1px solid rgba(233,243,239,.18);border-radius:var(--radius-l);padding:24px;}
.dark-item b{display:block;font-size:24px;font-weight:700;letter-spacing:.02em;color:var(--brand-soft);}
.dark-item span{display:block;margin-top:8px;font-size:14px;color:rgba(233,243,239,.78);line-height:1.7;}

/* ---------- FAQ ---------- */
.faq-list{display:grid;gap:14px;max-width:900px;margin:0 auto;}
.faq-item{
  background:var(--card);border:1px solid var(--border);border-radius:var(--radius-m);
  box-shadow:var(--shadow-s);overflow:hidden;transition:box-shadow var(--ease);
}
.faq-item:hover{box-shadow:var(--shadow-m);}
.faq-item summary{
  list-style:none;cursor:pointer;padding:20px 24px;display:flex;align-items:center;gap:16px;
  font-size:17px;font-weight:600;color:var(--ink);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary .plus{
  margin-left:auto;flex:0 0 auto;width:28px;height:28px;border-radius:50%;background:var(--surface);
  color:var(--brand-deep);display:inline-flex;align-items:center;justify-content:center;font-size:13px;
  transition:transform var(--ease),background var(--ease),color var(--ease);
}
.faq-item[open] summary .plus{transform:rotate(180deg);background:var(--brand-grad);color:#fff;}
.faq-answer{padding:0 24px 22px 24px;border-top:1px solid var(--border);margin-top:0;position:relative;}
.faq-answer::before{
  content:"";position:absolute;left:24px;top:-1px;width:64px;height:3px;border-radius:3px;background:var(--brand-grad);
}
.faq-answer p{font-size:15px;line-height:1.85;padding-top:16px;}
.faq-answer ol{margin-top:10px;display:grid;gap:6px;}
.faq-answer ol li{padding-left:20px;position:relative;font-size:15px;color:var(--muted);line-height:1.8;}
.faq-answer ol li::before{
  content:counter(list-item);position:absolute;left:0;top:0;font-weight:700;color:var(--brand-deep);font-size:13px;
}
.faq-answer ol{list-style:decimal;padding-left:0;}
.faq-answer ol li::before{content:none;}

/* ---------- CTA ---------- */
.cta-band{
  background:var(--brand-grad);border-radius:var(--radius-xl);padding:44px 48px;
  display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;
  box-shadow:0 20px 48px rgba(22,191,160,.28);color:#fff;
}
.cta-band h2{color:#fff;font-size:28px;margin-bottom:10px;}
.cta-band p{color:rgba(255,255,255,.92);font-size:15px;max-width:640px;}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap;}
.cta-band .btn-primary{background:#fff;color:var(--brand-deep);box-shadow:0 10px 24px rgba(12,59,52,.18);}
.cta-band .btn-primary:hover{color:var(--brand-deep);filter:none;background:#F4F8F6;}
.cta-band .btn-secondary{background:transparent;border-color:rgba(255,255,255,.7);color:#fff;}
.cta-band .btn-secondary:hover{background:rgba(255,255,255,.14);color:#fff;}

/* ---------- footer ---------- */
.site-footer{background:var(--ink);color:#E9F3EF;padding:72px 0 40px;margin-top:0;}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
.footer-brand .brand-text{color:#fff;font-weight:700;font-size:16px;}
.footer-desc{color:rgba(233,243,239,.72);font-size:14px;line-height:1.85;max-width:340px;}
.footer-col h4{font-size:15px;font-weight:700;color:#fff;margin-bottom:16px;}
.footer-col a{display:block;font-size:14px;color:rgba(233,243,239,.74);padding:6px 0;line-height:1.7;}
.footer-col a:hover{color:var(--brand-soft);}
.footer-bottom{
  margin-top:48px;padding-top:22px;border-top:1px solid rgba(233,243,239,.16);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:rgba(233,243,239,.6);
}

/* ---------- 移动底部 Tab ---------- */
.mobile-tabbar{
  display:none;position:fixed;left:0;right:0;bottom:0;z-index:80;
  background:rgba(255,255,255,.96);border-top:1px solid var(--border);
  height:60px;padding-bottom:env(safe-area-inset-bottom);
}
.mobile-tabbar a{
  flex:1 1 0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;
  font-size:10.5px;color:var(--faint);position:relative;
}
.mobile-tabbar a i{font-size:18px;line-height:1;}
.mobile-tabbar a.active{color:var(--brand-deep);font-weight:700;}
.mobile-tabbar a.active::before{
  content:"";position:absolute;top:0;left:22%;right:22%;height:3px;border-radius:0 0 4px 4px;background:var(--brand-grad);
}

/* ---------- 响应式 ---------- */
@media screen and (max-width:1023px){
  .container{padding:0 24px;}
  h1{font-size:34px;}
  h2{font-size:26px;}
  .section{padding:68px 0;}
  .split{grid-template-columns:1fr;gap:32px;}
  .split.reverse .split-media{order:0;}
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .dark-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media screen and (max-width:767px){
  .container{padding:0 18px;}
  h1{font-size:28px;}
  h2{font-size:22px;}
  h3{font-size:18px;}
  .section{padding:48px 0;}
  .section-tight{padding:44px 0;}
  .main-nav{display:none;}
  .header-inner{height:60px;gap:12px;}
  .brand-text{font-size:14px;}
  .header-cta{margin-left:auto;padding:9px 16px;font-size:14px;}
  .page-hero{padding:48px 0 56px;}
  .page-hero .lead{font-size:15px;}
  .spec-wrap{grid-template-columns:1fr;gap:16px;}
  .card-grid{grid-template-columns:1fr;gap:14px;}
  .dark-grid{grid-template-columns:1fr;gap:14px;}
  .step{gap:16px;}
  .step-num{width:44px;height:44px;font-size:16px;}
  .timeline::before{left:21px;}
  .step-body{padding:20px;}
  .faq-item summary{padding:16px 18px;font-size:16px;}
  .faq-answer{padding:0 18px 18px;}
  .faq-answer::before{left:18px;}
  .cta-band{padding:28px 22px;flex-direction:column;align-items:flex-start;}
  .cta-band h2{font-size:22px;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .footer-bottom{flex-direction:column;}
  .mobile-tabbar{display:flex;}
  body{padding-bottom:76px;}
  .badge b{font-size:18px;}
}
@media screen and (max-width:479px){
  .btn{padding:14px 22px;font-size:15px;width:100%;}
  .btn-ghost{width:auto;}
  .cta-actions{width:100%;}
  .cta-actions .btn{width:100%;}
}

/* roulang page: category2 */
:root{
  --brand-deep:#0C3B34;
  --brand:#16BFA0;
  --brand-dark:#0B8F6B;
  --brand-light:#6FE3BF;
  --brand-grad:linear-gradient(135deg,#0B8F6B 0%,#16BFA0 48%,#6FE3BF 100%);
  --accent:#FF7A45;
  --bg:#F4F8F6;
  --surface:#E9F3EF;
  --card:#FFFFFF;
  --text:#12211D;
  --muted:#5B6F69;
  --faint:#8B9C96;
  --border:#DCE8E3;
  --radius:20px;
  --radius-lg:24px;
  --radius-img:16px;
  --radius-sm:14px;
  --shadow:0 10px 30px rgba(12,59,52,.08);
  --shadow-hover:0 18px 44px rgba(12,59,52,.14);
  --gap-section:88px;
  --focus:0 0 0 3px rgba(23,195,162,.45);
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:system-ui,-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto;}
a{color:var(--brand-dark);text-decoration:none;transition:color .22s ease;}
a:hover{color:var(--brand);}
p{margin:0 0 14px;}
ul,ol{margin:0 0 14px;padding-left:22px;}
li{margin-bottom:8px;}
h1,h2,h3,h4{margin:0 0 14px;color:var(--text);letter-spacing:.01em;}
h1{font-size:44px;line-height:1.25;font-weight:700;}
h2{font-size:30px;line-height:1.3;font-weight:700;}
h3{font-size:20px;line-height:1.4;font-weight:600;}
h4{font-size:16px;line-height:1.5;font-weight:600;}
button{font-family:inherit;}
:focus-visible{outline:none;box-shadow:var(--focus);border-radius:8px;}

.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 32px;
}

/* ---------- 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 26px;
  border-radius:999px;
  border:1px solid transparent;
  cursor:pointer;
  transition:transform .22s ease,box-shadow .22s ease,background-color .22s ease,color .22s ease,border-color .22s ease;
  white-space:nowrap;
}
.btn-primary{
  background-image:var(--brand-grad);
  color:#fff;
  box-shadow:0 10px 24px rgba(12,143,107,.28);
}
.btn-primary:hover{color:#fff;transform:translateY(-2px);box-shadow:0 14px 30px rgba(12,143,107,.34);filter:brightness(1.06);}
.btn-primary:active{transform:translateY(0);box-shadow:0 6px 14px rgba(12,143,107,.24);}
.btn-outline{
  background:#fff;
  border-color:var(--brand);
  color:var(--brand-dark);
  border-radius:var(--radius-sm);
  box-shadow:var(--shadow);
}
.btn-outline:hover{background:var(--surface);color:var(--brand-dark);transform:translateY(-2px);box-shadow:var(--shadow-hover);}
.btn-outline:active{transform:translateY(0);}
.btn-ghost{background:transparent;color:var(--muted);border-radius:var(--radius-sm);}
.btn-ghost:hover{color:var(--brand-dark);background:var(--surface);}
.btn-sm{padding:10px 20px;font-size:14px;}
.btn-lg{padding:16px 32px;font-size:16px;}
.btn-block{width:100%;}

/* ---------- 徽章 ---------- */
.badge{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:6px 14px;
  border-radius:999px;
  background:var(--surface);
  color:var(--brand-deep);
  font-size:13px;
  font-weight:600;
  line-height:1.5;
}
.badge-accent{
  background:var(--accent);
  color:#fff;
  font-size:12px;
  padding:4px 10px;
}
.badge-row{display:flex;flex-wrap:wrap;gap:10px;}
.badge-row .badge b{font-size:20px;font-weight:700;letter-spacing:.02em;color:var(--brand-deep);}
.badge-row .badge span{font-size:12px;color:var(--muted);font-weight:500;}

/* ---------- 头部导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:#fff;
  border-bottom:1px solid var(--border);
  transition:box-shadow .25s ease;
}
.site-header.is-scrolled{box-shadow:0 8px 24px rgba(12,59,52,.08);}
.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  height:68px;
}
.brand{display:flex;align-items:center;gap:10px;color:var(--text);font-weight:700;}
.brand:hover{color:var(--text);}
.brand-mark{
  width:34px;height:34px;border-radius:11px;
  background-image:var(--brand-grad);
  display:inline-flex;align-items:center;justify-content:center;
  color:#fff;font-size:15px;
  box-shadow:0 6px 16px rgba(12,143,107,.28);
  flex:0 0 auto;
}
.brand-text{font-size:16px;font-weight:700;letter-spacing:.01em;}
.main-nav{display:flex;align-items:center;gap:6px;}
.main-nav a{
  position:relative;
  padding:10px 14px;
  font-size:15px;
  font-weight:500;
  color:var(--muted);
  border-radius:10px;
}
.main-nav a::after{
  content:"";
  position:absolute;
  left:14px;right:14px;bottom:4px;
  height:3px;border-radius:3px;
  background-image:var(--brand-grad);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .24s ease;
}
.main-nav a:hover{color:var(--brand-deep);background:var(--surface);}
.main-nav a:hover::after{transform:scaleX(1);}
.main-nav a.active{color:var(--brand-deep);font-weight:700;}
.main-nav a.active::after{transform:scaleX(1);}
.header-cta{flex:0 0 auto;}

/* ---------- 分类横幅 ---------- */
.page-banner{
  position:relative;
  overflow:hidden;
  background:
    radial-gradient(circle at 88% 8%, rgba(111,227,191,.22) 0%, rgba(111,227,191,0) 42%),
    linear-gradient(120deg,#0C3B34 0%,#0E4A40 52%,#127A63 100%);
  color:#fff;
  padding:64px 0 76px;
}
.page-banner::before{
  content:"";
  position:absolute;
  left:0;right:0;bottom:0;
  height:56px;
  background-image:var(--brand-grad);
  opacity:.16;
  clip-path:polygon(0 100%,100% 0,100% 100%);
}
.banner-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(233,243,239,.72);
  margin-bottom:16px;
}
.crumb a{color:rgba(233,243,239,.86);}
.crumb a:hover{color:#fff;text-decoration:underline;}
.crumb i{font-size:10px;opacity:.7;}
.page-banner h1{color:#fff;margin-bottom:16px;}
.page-banner .banner-sub{
  font-size:16px;
  line-height:1.85;
  color:rgba(233,243,239,.86);
  margin-bottom:26px;
  max-width:720px;
}
.banner-actions{display:flex;flex-wrap:wrap;gap:14px;}
.page-banner .btn-outline{
  background:rgba(255,255,255,.08);
  border-color:rgba(233,243,239,.45);
  color:#fff;
  box-shadow:none;
}
.page-banner .btn-outline:hover{background:rgba(255,255,255,.16);color:#fff;}

/* ---------- 数据条 ---------- */
.stat-strip{
  background:#fff;
  border-bottom:1px solid var(--border);
  padding:22px 0;
}
.stat-strip .stat-grid{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:20px;
}
.stat-item{display:flex;flex-direction:column;gap:2px;padding-left:14px;border-left:3px solid var(--surface);}
.stat-item b{font-size:22px;font-weight:700;letter-spacing:.02em;color:var(--brand-deep);line-height:1.3;}
.stat-item span{font-size:13px;color:var(--muted);}

/* ---------- 通用板块 ---------- */
.section{padding:var(--gap-section) 0;}
.section-alt{background:var(--surface);}
.section-head{max-width:760px;margin-bottom:44px;}
.section-head .eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;color:var(--brand-dark);
  background:var(--surface);
  padding:6px 14px;border-radius:999px;
  margin-bottom:14px;
}
.section-alt .section-head .eyebrow{background:#fff;}
.section-head p{color:var(--muted);font-size:16px;margin:0;}

/* ---------- 交替图文 ---------- */
.f-row{
  display:grid;
  grid-template-columns:1.02fr 1fr;
  gap:48px;
  align-items:center;
  padding:34px 0;
  border-bottom:1px dashed var(--border);
}
.f-row:last-child{border-bottom:none;padding-bottom:0;}
.f-row:first-child{padding-top:0;}
.f-row .f-media{order:2;}
.f-row.alt .f-media{order:1;}
.f-row.alt .f-body{order:2;}
.f-media{
  border-radius:var(--radius-lg);
  overflow:hidden;
  background:var(--surface);
  border:1px solid var(--border);
  box-shadow:var(--shadow);
  transition:transform .22s ease,box-shadow .22s ease;
}
.f-media:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);}
.f-media img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:0;}
.f-num{
  display:inline-flex;align-items:center;justify-content:center;
  width:40px;height:40px;border-radius:12px;
  background-image:var(--brand-grad);color:#fff;
  font-size:16px;font-weight:700;margin-bottom:16px;
  box-shadow:0 8px 18px rgba(12,143,107,.26);
}
.f-body h3{font-size:22px;margin-bottom:12px;}
.f-body p{color:var(--muted);font-size:15.5px;}
.f-list{list-style:none;padding:0;margin:16px 0 0;}
.f-list li{
  position:relative;
  padding-left:26px;
  font-size:15px;
  color:var(--text);
  margin-bottom:8px;
}
.f-list li::before{
  content:"";
  position:absolute;left:6px;top:12px;
  width:8px;height:8px;border-radius:50%;
  background-image:var(--brand-grad);
}

/* ---------- 模块卡片 ---------- */
.card-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:24px;
}
.card{
  background:var(--card);
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:28px;
  box-shadow:var(--shadow);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
  display:flex;
  flex-direction:column;
  gap:10px;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:#C8E2DA;}
.card-icon{
  width:46px;height:46px;border-radius:14px;
  background:var(--surface);
  color:var(--brand-dark);
  display:inline-flex;align-items:center;justify-content:center;
  font-size:18px;
  margin-bottom:4px;
}
.card h3{font-size:18px;margin:0;}
.card p{font-size:14.5px;color:var(--muted);margin:0;}

/* ---------- 规格对照 ---------- */
.spec-wrap{
  display:grid;
  grid-template-columns:1.1fr .9fr;
  gap:28px;
  align-items:start;
}
.spec-card{
  background:#fff;
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  padding:28px;
  box-shadow:var(--shadow);
}
.spec-card h3{margin-bottom:18px;}
.spec-line{
  display:flex;
  justify-content:space-between;
  gap:16px;
  padding:13px 0;
  border-bottom:1px dashed var(--border);
  font-size:15px;
}
.spec-line:last-child{border-bottom:none;}
.spec-line span{color:var(--muted);}
.spec-line b{font-weight:600;color:var(--text);text-align:right;}
.tip-card{
  background:linear-gradient(150deg,#0C3B34 0%,#0F5445 100%);
  color:#E9F3EF;
  border-radius:var(--radius-lg);
  padding:30px;
  box-shadow:0 18px 40px rgba(12,59,52,.22);
}
.tip-card h3{color:#fff;font-size:20px;}
.tip-card p{color:rgba(233,243,239,.82);font-size:15px;}
.tip-card ul{list-style:none;padding:0;margin:16px 0 0;}
.tip-card li{
  position:relative;
  padding-left:24px;
  font-size:14.5px;
  color:rgba(233,243,239,.92);
  margin-bottom:10px;
}
.tip-card li::before{
  content:"\f00c";
  font-family:"Font Awesome 6 Free";
  font-weight:900;
  position:absolute;left:0;top:0;
  color:var(--brand-light);
  font-size:12px;
}

/* ---------- FAQ ---------- */
.faq{display:flex;flex-direction:column;gap:14px;}
.faq-item{
  background:#fff;
  border:1px solid var(--border);
  border-radius:var(--radius-img);
  overflow:hidden;
  box-shadow:var(--shadow);
  transition:box-shadow .22s ease;
}
.faq-item:hover{box-shadow:var(--shadow-hover);}
.faq-q{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  padding:20px 24px;
  background:transparent;
  border:none;
  text-align:left;
  font-size:17px;
  font-weight:600;
  color:var(--text);
  cursor:pointer;
}
.faq-q i{color:var(--faint);transition:transform .24s ease,color .24s ease;font-size:15px;}
.faq-item.open .faq-q i{transform:rotate(180deg);color:var(--brand);}
.faq-a{
  display:none;
  padding:0 24px 22px;
  font-size:15px;
  line-height:1.85;
  color:var(--muted);
}
.faq-item.open{position:relative;border-left:4px solid transparent;border-image:var(--brand-grad) 1;border-image-slice:0 0 0 1;}
.faq-item.open .faq-a{display:block;background:var(--bg);border-radius:12px;margin:0 14px 16px;padding:16px 18px;}

/* ---------- CTA 条 ---------- */
.cta-band{
  background-image:var(--brand-grad);
  color:#fff;
  padding:56px 0;
}
.cta-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:32px;
}
.cta-inner h2{color:#fff;margin-bottom:8px;font-size:28px;}
.cta-inner p{color:rgba(255,255,255,.9);margin:0;font-size:15.5px;max-width:640px;}
.cta-band .btn-primary{
  background:#fff;
  background-image:none;
  color:var(--brand-deep);
  box-shadow:0 12px 26px rgba(6,44,37,.24);
}
.cta-band .btn-primary:hover{color:var(--brand-deep);filter:none;background:#F4F8F6;}
.cta-band .btn-outline{
  background:transparent;
  border-color:rgba(255,255,255,.7);
  color:#fff;
  box-shadow:none;
}
.cta-band .btn-outline:hover{background:rgba(255,255,255,.16);color:#fff;}

/* ---------- 页脚 ---------- */
.site-footer{
  background:#0C3B34;
  color:rgba(233,243,239,.78);
  padding:64px 0 28px;
  font-size:14px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1fr;
  gap:32px;
  padding-bottom:36px;
  border-bottom:1px solid rgba(233,243,239,.14);
}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:700;margin-bottom:14px;}
.footer-brand .brand-mark{box-shadow:none;}
.footer-brand .brand-text{color:#fff;}
.footer-desc{color:rgba(233,243,239,.7);font-size:14px;line-height:1.85;margin:0;max-width:360px;}
.footer-col h4{color:#fff;font-size:15px;margin-bottom:16px;}
.footer-col a{
  display:block;
  color:rgba(233,243,239,.74);
  padding:5px 0;
  font-size:14px;
}
.footer-col a:hover{color:var(--brand-light);}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  gap:12px;
  padding-top:22px;
  font-size:13px;
  color:rgba(233,243,239,.6);
}

/* ---------- 移动端底部 Tab ---------- */
.mobile-tab{
  display:none;
  position:fixed;
  left:0;right:0;bottom:0;
  z-index:70;
  background:rgba(255,255,255,.96);
  backdrop-filter:blur(8px);
  border-top:1px solid var(--border);
  padding-bottom:env(safe-area-inset-bottom);
}
.mobile-tab .tab-inner{display:flex;height:60px;}
.mobile-tab a{
  position:relative;
  flex:1 1 0;
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:3px;
  font-size:10.5px;
  color:var(--faint);
  font-weight:500;
}
.mobile-tab a i{font-size:18px;}
.mobile-tab a.active{color:var(--brand-dark);font-weight:700;}
.mobile-tab a.active::before{
  content:"";
  position:absolute;
  top:0;left:22%;right:22%;
  height:3px;border-radius:0 0 4px 4px;
  background-image:var(--brand-grad);
}

/* ---------- 响应式 ---------- */
@media screen and (max-width:1023px){
  h1{font-size:34px;}
  h2{font-size:26px;}
  .container{padding:0 24px;}
  .main-nav{display:none;}
  .header-inner{height:62px;}
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .spec-wrap{grid-template-columns:1fr;}
  .stat-strip .stat-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-grid{grid-template-columns:1fr 1fr;gap:26px;}
  .f-row{grid-template-columns:1fr;gap:24px;padding:26px 0;}
  .f-row .f-media,.f-row.alt .f-media{order:1;}
  .f-row .f-body,.f-row.alt .f-body{order:2;}
  .section{padding:64px 0;}
}
@media screen and (max-width:767px){
  .brand-text{font-size:14.5px;}
  .header-cta{padding:9px 16px;font-size:13px;}
  .page-banner{padding:44px 0 56px;}
  .page-banner::before{height:36px;}
  .cta-inner{flex-direction:column;align-items:flex-start;}
  .cta-inner h2{font-size:23px;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-desc{max-width:none;}
  .f-body h3{font-size:19px;}
  .faq-q{font-size:16px;padding:18px 18px;}
  .faq-a{padding:0 18px 18px;}
}
@media screen and (max-width:520px){
  h1{font-size:28px;}
  h2{font-size:22px;}
  .container{padding:0 18px;}
  .card-grid{grid-template-columns:1fr;gap:14px;}
  .stat-strip .stat-grid{grid-template-columns:1fr;gap:14px;}
  .section{padding:48px 0;}
  .card{padding:20px;}
  .spec-card{padding:20px;}
  .tip-card{padding:22px;}
  .badge-row{gap:8px;}
  .banner-actions .btn{width:100%;}
  .mobile-tab{display:block;}
  body{padding-bottom:76px;}
  .footer-bottom{flex-direction:column;}
}

/* roulang page: category4 */
:root{
  --brand-deep:#0C3B34;
  --brand:#0B8F6B;
  --brand-light:#16BFA0;
  --brand-grad:linear-gradient(135deg,#0B8F6B 0%,#16BFA0 48%,#6FE3BF 100%);
  --accent:#FF7A45;
  --bg:#F4F8F6;
  --surface:#E9F3EF;
  --card:#FFFFFF;
  --text:#12211D;
  --muted:#5B6F69;
  --weak:#8B9C96;
  --border:#DCE8E3;
  --radius:20px;
  --radius-lg:24px;
  --radius-sm:16px;
  --shadow:0 10px 30px rgba(12,59,52,.08);
  --shadow-hover:0 18px 44px rgba(12,59,52,.14);
  --sec:88px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:system-ui,-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--text);
  background:var(--bg);
}
img{max-width:100%;display:block;border-radius:var(--radius-sm)}
a{color:var(--brand-light);text-decoration:none;transition:color .2s ease}
a:hover{color:var(--brand)}
h1,h2,h3,h4{margin:0;color:var(--text);line-height:1.3}
h1{font-size:44px;font-weight:700;line-height:1.25}
h2{font-size:30px;font-weight:700}
h3{font-size:20px;font-weight:600;line-height:1.4}
p{margin:0 0 14px}
ul{margin:0;padding-left:0;list-style:none}
button{font:inherit}
.container{max-width:1200px;margin:0 auto;padding:0 32px;width:100%}
.section{padding:var(--sec) 0}
.section-tight{padding:56px 0}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:36px;flex-wrap:wrap}
.sec-head p{margin:8px 0 0;color:var(--muted);font-size:15px;max-width:640px}
.link-more{font-size:14px;font-weight:600;color:var(--brand);display:inline-flex;align-items:center;gap:6px}
.link-more:hover{text-decoration:underline}
:focus-visible{outline:3px solid rgba(23,195,162,.45);outline-offset:2px;border-radius:6px}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:80;background:#fff;
  border-bottom:1px solid var(--border);
  transition:box-shadow .25s ease;
}
.site-header.is-scrolled{box-shadow:0 6px 22px rgba(12,59,52,.08)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:68px}
.brand{display:flex;align-items:center;gap:10px;color:var(--text);font-weight:700}
.brand:hover{color:var(--text)}
.brand-mark{
  width:36px;height:36px;border-radius:11px;display:grid;place-items:center;
  background:var(--brand-grad);color:#fff;font-size:16px;
  box-shadow:0 6px 16px rgba(11,143,107,.28);flex:0 0 auto;
}
.brand-text{font-size:16px;font-weight:700;letter-spacing:.01em;white-space:nowrap}
.main-nav{display:flex;align-items:center;gap:4px}
.main-nav a{
  position:relative;padding:10px 14px;border-radius:10px;
  color:var(--muted);font-size:15px;font-weight:500;
}
.main-nav a:hover{color:var(--brand-deep);background:var(--surface)}
.main-nav a.active{color:var(--brand-deep);font-weight:700}
.main-nav a.active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;height:3px;
  border-radius:3px;background:var(--brand-grad);
}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;font-size:15px;font-weight:600;cursor:pointer;
  border:0;transition:transform .22s ease,box-shadow .22s ease,filter .22s ease,background .22s ease;
  white-space:nowrap;
}
.btn-primary{
  background:var(--brand-grad);color:#fff;border-radius:999px;
  box-shadow:0 10px 24px rgba(11,143,107,.28);
}
.btn-primary:hover{color:#fff;filter:brightness(1.06);transform:translateY(-2px);box-shadow:0 16px 32px rgba(11,143,107,.34)}
.btn-primary:active{transform:translateY(0);box-shadow:0 6px 16px rgba(11,143,107,.26)}
.btn-outline{
  background:#fff;border:1px solid var(--brand-light);color:var(--brand);border-radius:14px;
}
.btn-outline:hover{color:var(--brand-deep);transform:translateY(-2px);box-shadow:var(--shadow)}
.btn-ghost{background:transparent;color:var(--muted);border-radius:14px}
.btn-ghost:hover{color:var(--brand);background:var(--surface)}
.btn-sm{padding:9px 18px;font-size:14px}
.btn-lg{padding:15px 32px;font-size:16px}

/* ---------- badges ---------- */
.badge{
  display:inline-flex;align-items:center;gap:8px;border-radius:999px;
  padding:8px 16px;font-size:13px;background:var(--surface);color:var(--brand-deep);
  border:1px solid var(--border);
}
.badge b{font-size:20px;font-weight:700;letter-spacing:.02em;color:var(--brand-deep);line-height:1}
.badge .unit{font-size:12px;color:var(--muted)}
.badge-row{display:flex;flex-wrap:wrap;gap:12px}
.badge-accent b{color:var(--accent)}
.flag-new{
  display:inline-block;background:var(--accent);color:#fff;border-radius:999px;
  padding:3px 10px;font-size:12px;font-weight:700;letter-spacing:.02em;
}
.tag{
  display:inline-block;background:var(--surface);color:var(--brand-deep);
  border-radius:999px;padding:4px 12px;font-size:12.5px;font-weight:600;
}

/* ---------- banner ---------- */
.page-banner{
  position:relative;color:#fff;overflow:hidden;
  padding:70px 0 62px;
  background:url(/assets/images/backpic/back-2.png) center/cover no-repeat;
}
.page-banner::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(118deg,rgba(12,59,52,.95) 0%,rgba(11,143,107,.88) 55%,rgba(22,191,160,.76) 100%);
}
.page-banner::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:8px;
  background:linear-gradient(100deg,#0B8F6B 0%,#16BFA0 48%,#6FE3BF 100%);
}
.banner-inner{position:relative;z-index:2}
.crumbs{display:flex;align-items:center;gap:8px;font-size:13px;color:rgba(233,243,239,.82);margin-bottom:18px;flex-wrap:wrap}
.crumbs a{color:rgba(233,243,239,.86)}
.crumbs a:hover{color:#fff;text-decoration:underline}
.crumbs .sep{opacity:.6}
.crumbs .current{color:#fff;font-weight:600}
.page-banner h1{color:#fff;max-width:820px}
.page-banner .lead{
  color:rgba(233,243,239,.92);font-size:16px;max-width:680px;margin:16px 0 26px;
}
.banner-badges{display:flex;flex-wrap:wrap;gap:12px}
.banner-badges .badge{
  background:rgba(255,255,255,.13);border:1px solid rgba(255,255,255,.26);color:#fff;
}
.banner-badges .badge b{color:#FFC2A6}

/* ---------- version card ---------- */
.version-card{
  display:grid;grid-template-columns:1.15fr .85fr;gap:36px;align-items:center;
  background:var(--card);border:1px solid var(--border);border-radius:var(--radius-lg);
  box-shadow:var(--shadow);padding:34px;
}
.version-card h2{font-size:26px;margin-bottom:12px}
.version-card p{color:var(--muted);font-size:15px}
.vc-figure img{width:100%;aspect-ratio:16/10;object-fit:cover;border:1px solid var(--border);box-shadow:inset 0 0 0 1px rgba(255,255,255,.5)}
.vc-list{margin-top:18px;display:grid;gap:10px}
.vc-list li{display:flex;gap:10px;align-items:flex-start;font-size:14.5px;color:var(--muted)}
.vc-list i{color:var(--brand-light);margin-top:7px;font-size:12px}

/* ---------- type grid ---------- */
.type-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.type-card{
  background:var(--card);border:1px solid var(--border);border-radius:var(--radius);
  padding:28px;box-shadow:var(--shadow);transition:transform .22s ease,box-shadow .22s ease;
}
.type-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}
.type-icon{
  width:44px;height:44px;border-radius:13px;display:grid;place-items:center;
  background:var(--surface);color:var(--brand);font-size:18px;margin-bottom:16px;
}
.type-card h3{margin-bottom:8px;font-size:17px}
.type-card p{font-size:14px;color:var(--muted);margin:0}

/* ---------- timeline ---------- */
.timeline{position:relative;margin-top:12px}
.timeline::before{
  content:"";position:absolute;left:143px;top:14px;bottom:14px;width:2px;
  background:linear-gradient(180deg,#16BFA0 0%,rgba(22,191,160,.18) 100%);
}
.tl-item{display:grid;grid-template-columns:118px 52px 1fr;align-items:start;margin-bottom:22px}
.tl-date{
  padding-right:24px;text-align:right;font-size:13px;color:var(--weak);
  line-height:1.5;padding-top:24px;
}
.tl-date strong{display:block;font-size:14px;color:var(--muted);font-weight:600}
.tl-dot{display:flex;justify-content:center;padding-top:30px}
.tl-dot span{
  width:14px;height:14px;border-radius:50%;background:var(--brand-grad);
  box-shadow:0 0 0 5px rgba(22,191,160,.14);
}
.tl-card{
  background:var(--card);border:1px solid var(--border);border-radius:var(--radius);
  padding:24px 28px;box-shadow:var(--shadow);
  transition:transform .22s ease,box-shadow .22s ease;
}
.tl-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}
.tl-head{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:6px}
.v-badge{
  display:inline-flex;align-items:center;gap:6px;background:var(--brand-deep);color:#fff;
  border-radius:999px;padding:5px 14px;font-size:13px;font-weight:700;letter-spacing:.02em;
}
.v-badge.mid{background:#0B8F6B}
.v-badge.soft{background:var(--surface);color:var(--brand-deep)}
.tl-card h3{font-size:18px;margin:6px 0 12px}
.change-list{display:grid;gap:8px}
.change-list li{display:flex;gap:10px;align-items:flex-start;font-size:14.5px;color:var(--muted)}
.change-list i{margin-top:7px;font-size:11px;color:var(--brand-light)}
.change-list b{color:var(--text);font-weight:600}

/* ---------- dark band ---------- */
.band-dark{
  background:linear-gradient(135deg,#0C3B34 0%,#0B5F4E 60%,#0B8F6B 100%);
  color:#E9F3EF;position:relative;overflow:hidden;
}
.band-dark::before{
  content:"";position:absolute;top:-90px;right:-60px;width:320px;height:320px;border-radius:50%;
  background:radial-gradient(circle,rgba(111,227,191,.22) 0%,rgba(111,227,191,0) 70%);
}
.band-dark h2{color:#fff}
.band-dark .sec-head p{color:rgba(233,243,239,.82)}
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;position:relative;z-index:2}
.step{
  background:rgba(255,255,255,.07);border:1px solid rgba(233,243,239,.2);
  border-radius:var(--radius);padding:26px 24px;
  transition:transform .22s ease,background .22s ease;
}
.step:hover{transform:translateY(-4px);background:rgba(255,255,255,.11)}
.step-no{
  width:34px;height:34px;border-radius:50%;display:grid;place-items:center;
  background:var(--brand-grad);color:#05392C;font-weight:700;font-size:14px;margin-bottom:14px;
}
.step h3{color:#fff;font-size:17px;margin-bottom:8px}
.step p{margin:0;font-size:14px;color:rgba(233,243,239,.8)}

/* ---------- spec ---------- */
.spec-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.spec-item{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  background:var(--card);border:1px solid var(--border);border-radius:14px;padding:14px 18px;
  font-size:14.5px;color:var(--muted);
}
.spec-item span:last-child{color:var(--text);font-weight:600;text-align:right}
.spec-note{margin-top:18px;font-size:14px;color:var(--muted)}

/* ---------- faq ---------- */
.faq-list{display:grid;gap:14px}
.faq-item{
  background:var(--card);border:1px solid var(--border);border-radius:var(--radius-sm);
  box-shadow:var(--shadow);overflow:hidden;
}
.faq-item summary{
  list-style:none;cursor:pointer;padding:18px 24px 18px 20px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  font-size:17px;font-weight:600;color:var(--text);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:"+";font-size:20px;font-weight:400;color:var(--weak);
  transition:transform .22s ease,color .22s ease;flex:0 0 auto;line-height:1;
}
.faq-item[open] summary{color:var(--brand-deep)}
.faq-item[open] summary::after{content:"−";color:var(--brand-light)}
.faq-answer{
  padding:0 24px 20px 20px;font-size:15px;line-height:1.85;color:var(--muted);
  background:var(--bg);border-top:1px solid var(--border);padding-top:16px;
}
.faq-answer p{margin:0}
.faq-item[open] .faq-item-inner{border-left:3px solid transparent}

/* ---------- cta ---------- */
.cta-band{
  background:linear-gradient(120deg,#0B8F6B 0%,#16BFA0 52%,#6FE3BF 100%);
  border-radius:var(--radius-lg);padding:44px;color:#fff;
  display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;
  box-shadow:0 20px 46px rgba(11,143,107,.24);
}
.cta-band h2{color:#fff;font-size:26px;margin-bottom:8px}
.cta-band p{margin:0;color:rgba(255,255,255,.9);font-size:15px;max-width:620px}
.cta-band .btn-outline{background:rgba(255,255,255,.14);border-color:rgba(255,255,255,.6);color:#fff}
.cta-band .btn-outline:hover{background:#fff;color:var(--brand-deep)}

/* ---------- footer ---------- */
.site-footer{background:var(--brand-deep);color:rgba(233,243,239,.78);margin-top:var(--sec);padding:64px 0 26px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:36px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.footer-brand .brand-text{color:#fff}
.footer-desc{font-size:14px;line-height:1.8;color:rgba(233,243,239,.72);margin:0;max-width:340px}
.footer-col h4{color:#fff;font-size:15px;font-weight:600;margin-bottom:16px}
.footer-col a{display:block;color:rgba(233,243,239,.74);font-size:14px;padding:5px 0}
.footer-col a:hover{color:#6FE3BF}
.footer-bottom{
  margin-top:44px;padding-top:20px;border-top:1px solid rgba(233,243,239,.16);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:rgba(233,243,239,.6);
}

/* ---------- mobile tab ---------- */
.mobile-tab{
  display:none;position:fixed;left:0;right:0;bottom:0;z-index:90;
  height:60px;background:rgba(255,255,255,.97);border-top:1px solid var(--border);
  padding-bottom:env(safe-area-inset-bottom);
}
.mobile-tab a{
  flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;
  font-size:10.5px;color:var(--weak);position:relative;
}
.mobile-tab a i{font-size:17px}
.mobile-tab a.active{color:var(--brand);font-weight:600}
.mobile-tab a.active::before{
  content:"";position:absolute;top:0;left:50%;transform:translateX(-50%);
  width:26px;height:3px;border-radius:0 0 3px 3px;background:var(--brand-grad);
}

/* ---------- responsive ---------- */
@media (max-width:1023px){
  :root{--sec:64px}
  h1{font-size:34px}
  h2{font-size:26px}
  .container{padding:0 24px}
  .type-grid{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:repeat(2,1fr)}
  .version-card{grid-template-columns:1fr;gap:24px;padding:26px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
}
@media (max-width:767px){
  :root{--sec:48px}
  body{padding-bottom:76px}
  .container{padding:0 18px}
  h1{font-size:28px}
  h2{font-size:22px}
  h3{font-size:18px}
  .main-nav{display:none}
  .header-cta{display:none}
  .header-inner{height:62px}
  .brand-text{font-size:14.5px;white-space:normal;line-height:1.25;max-width:190px}
  .page-banner{padding:44px 0 40px}
  .page-banner .lead{font-size:15px}
  .section{padding:var(--sec) 0}
  .sec-head{margin-bottom:24px}
  .type-grid{grid-template-columns:1fr;gap:16px}
  .steps{grid-template-columns:1fr;gap:16px}
  .spec-grid{grid-template-columns:1fr}
  .mobile-tab{display:flex}
  .version-card{padding:22px}
  .tl-item{grid-template-columns:1fr;margin-bottom:18px;padding-left:26px;position:relative}
  .timeline::before{left:5px;top:10px;bottom:10px}
  .tl-dot{position:absolute;left:0;top:8px;padding-top:0;justify-content:flex-start}
  .tl-dot span{width:12px;height:12px;box-shadow:0 0 0 4px rgba(22,191,160,.14)}
  .tl-date{text-align:left;padding:0 0 8px;font-size:12.5px}
  .tl-date strong{display:inline;font-size:12.5px}
  .tl-card{padding:20px}
  .cta-band{padding:28px 22px;border-radius:18px}
  .footer-grid{grid-template-columns:1fr;gap:24px}
  .footer-bottom{flex-direction:column}
}
@media (max-width:479px){
  h1{font-size:26px}
  .btn{width:100%}
  .banner-badges .badge{width:100%;justify-content:space-between}
  .cta-band .btn{width:100%}
}
@media (min-width:768px){
  .mobile-tab{display:none}
}

/* roulang page: category3 */
:root{
  --brand-deep:#0C3B34;
  --brand:#16BFA0;
  --brand-dark:#0B8F6B;
  --brand-light:#6FE3BF;
  --accent:#FF7A45;
  --bg:#F4F8F6;
  --surface:#E9F3EF;
  --card:#FFFFFF;
  --text:#12211D;
  --muted:#5B6F69;
  --weak:#8B9C96;
  --border:#DCE8E3;
  --danger:#D9534F;
  --grad:linear-gradient(135deg,#0B8F6B 0%,#16BFA0 48%,#6FE3BF 100%);
  --r-card:20px;
  --r-lg:24px;
  --r-md:16px;
  --r-sm:12px;
  --shadow:0 10px 30px rgba(12,59,52,.08);
  --shadow-hover:0 18px 44px rgba(12,59,52,.14);
  --gap:24px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:system-ui,-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--text);
  background:var(--bg);
  padding-bottom:0;
}
img{max-width:100%;display:block;border-radius:16px;object-fit:cover;background:#E9F3EF;}
a{color:var(--brand-dark);text-decoration:none;}
a:hover{color:var(--brand);}
button,input,textarea,select{font-family:inherit;font-size:inherit;}
h1,h2,h3,h4{margin:0;color:var(--text);line-height:1.3;}
p{margin:0 0 14px;}
ul,ol{margin:0;padding:0;list-style:none;}
:focus-visible{outline:3px solid rgba(23,195,162,.45);outline-offset:2px;border-radius:6px;}
::selection{background:rgba(22,191,160,.24);}

.container{max-width:1200px;margin:0 auto;padding:0 32px;}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:120;
  background:#FFFFFF;
  border-bottom:1px solid var(--border);
  transition:box-shadow .22s ease;
}
.site-header.is-scrolled{box-shadow:0 8px 24px rgba(12,59,52,.08);}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:68px;}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand-mark{
  width:34px;height:34px;border-radius:10px;background:var(--grad);
  display:inline-flex;align-items:center;justify-content:center;
  color:#fff;font-size:16px;box-shadow:0 6px 16px rgba(22,191,160,.32);
}
.brand-text{font-weight:700;font-size:17px;color:var(--brand-deep);letter-spacing:.01em;}
.main-nav{display:flex;align-items:center;gap:6px;flex:1 1 auto;justify-content:center;}
.main-nav a{
  position:relative;padding:10px 14px;font-size:15px;font-weight:500;color:var(--muted);
  border-radius:10px;transition:color .2s ease,background .2s ease;
}
.main-nav a::after{
  content:"";position:absolute;left:14px;right:14px;bottom:4px;height:2px;border-radius:2px;
  background:var(--grad);transform:scaleX(0);transform-origin:left;transition:transform .22s ease;
}
.main-nav a:hover{color:var(--brand-dark);background:#F4F8F6;}
.main-nav a:hover::after{transform:scaleX(1);}
.main-nav a.active{color:var(--brand-dark);font-weight:700;}
.main-nav a.active::after{transform:scaleX(1);}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-size:15px;font-weight:600;line-height:1;
  padding:14px 26px;border-radius:999px;border:1px solid transparent;
  cursor:pointer;transition:transform .22s ease,box-shadow .22s ease,background .22s ease,color .22s ease;
}
.btn i{font-size:14px;}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 10px 24px rgba(22,191,160,.3);}
.btn-primary:hover{color:#fff;transform:translateY(-2px);box-shadow:0 16px 32px rgba(22,191,160,.36);}
.btn-primary:active{transform:translateY(0);box-shadow:0 6px 14px rgba(22,191,160,.28);}
.btn-ghost{background:#fff;color:var(--brand-dark);border-color:var(--brand);border-radius:14px;}
.btn-ghost:hover{background:#F0FAF7;transform:translateY(-2px);}
.btn-ghost:active{transform:translateY(0);}
.btn-weak{background:transparent;color:var(--muted);}
.btn-weak:hover{color:var(--brand-dark);}
.btn-sm{padding:10px 20px;font-size:14px;}

/* ---------- Banner ---------- */
.view-banner{
  position:relative;overflow:hidden;color:#fff;
  background-image:linear-gradient(115deg,rgba(12,59,52,.95) 0%,rgba(11,143,107,.88) 52%,rgba(22,191,160,.74) 100%),
    url('/assets/images/backpic/back-2.png');
  background-size:cover;background-position:center;
}
.view-banner::after{
  content:"";position:absolute;right:-120px;bottom:-160px;width:460px;height:460px;border-radius:50%;
  background:var(--grad);opacity:.14;filter:blur(2px);pointer-events:none;
}
.banner-inner{position:relative;z-index:2;padding:56px 0 60px;}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:rgba(233,243,239,.78);margin-bottom:18px;}
.crumbs a{color:rgba(233,243,239,.86);}
.crumbs a:hover{color:#fff;}
.crumbs span.sep{opacity:.55;}
.crumbs .current{color:#fff;font-weight:600;}
.banner-tag{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;
  padding:6px 14px;border-radius:999px;background:rgba(233,243,239,.16);
  border:1px solid rgba(233,243,239,.3);color:#E9F3EF;margin-bottom:16px;
}
.view-banner h1{
  font-size:44px;line-height:1.25;font-weight:700;color:#fff;max-width:820px;
}
.banner-sub{margin-top:16px;font-size:16px;color:rgba(233,243,239,.9);max-width:720px;line-height:1.8;}
.banner-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:26px;}
.banner-actions .btn-ghost{background:rgba(255,255,255,.96);}
.banner-badges{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px;}
.badge{
  display:inline-flex;align-items:center;gap:8px;padding:7px 15px;border-radius:999px;
  background:rgba(233,243,239,.16);border:1px solid rgba(233,243,239,.28);
  font-size:13px;color:#E9F3EF;
}
.badge b{font-size:16px;font-weight:700;letter-spacing:.02em;}

/* ---------- Sections ---------- */
.section{padding:72px 0;}
.section.tight{padding:56px 0;}
.section-head{max-width:760px;margin-bottom:34px;}
.section-title{font-size:30px;font-weight:700;}
.section-sub{margin-top:12px;color:var(--muted);font-size:15.5px;}
.eyebrow{
  display:inline-block;font-size:13px;font-weight:600;letter-spacing:.06em;
  color:var(--brand-dark);background:var(--surface);padding:5px 12px;border-radius:999px;margin-bottom:12px;
}

/* ---------- Layout with sticky rail ---------- */
.layout{display:grid;grid-template-columns:minmax(0,1fr) 344px;gap:32px;align-items:start;}

/* ---------- Issue groups ---------- */
.issue-group{background:var(--card);border:1px solid var(--border);border-radius:var(--r-lg);padding:28px;box-shadow:var(--shadow);margin-bottom:24px;}
.group-head{display:flex;align-items:center;gap:12px;margin-bottom:8px;}
.group-num{
  width:34px;height:34px;border-radius:10px;background:var(--grad);color:#fff;
  display:inline-flex;align-items:center;justify-content:center;font-weight:700;font-size:15px;flex:0 0 auto;
}
.group-head h2{font-size:20px;font-weight:600;}
.group-desc{color:var(--muted);font-size:14.5px;margin:0 0 6px 46px;}
.issue{padding:22px 0 4px;border-top:1px solid var(--border);margin-top:18px;}
.issue:first-of-type{border-top:0;margin-top:10px;padding-top:6px;}
.issue h3{font-size:17px;font-weight:600;display:flex;gap:10px;align-items:flex-start;}
.issue h3 .dot{
  width:9px;height:9px;border-radius:50%;background:var(--grad);flex:0 0 auto;margin-top:8px;
}
.cause{color:var(--muted);font-size:14.5px;margin:10px 0 12px;padding-left:19px;}
.steps{padding-left:19px;counter-reset:step;}
.steps li{
  counter-increment:step;position:relative;padding-left:30px;margin-bottom:9px;
  font-size:15px;color:var(--text);line-height:1.75;
}
.steps li::before{
  content:counter(step);position:absolute;left:0;top:3px;
  width:20px;height:20px;border-radius:50%;background:var(--surface);color:var(--brand-dark);
  font-size:12px;font-weight:700;display:flex;align-items:center;justify-content:center;
}
.tip-inline{
  display:flex;gap:10px;align-items:flex-start;margin:14px 0 0 19px;
  background:var(--bg);border-left:3px solid var(--brand);border-radius:10px;padding:12px 14px;
  font-size:14px;color:var(--muted);
}
.tip-inline i{color:var(--brand-dark);margin-top:4px;}

/* ---------- Sticky rail ---------- */
.side-rail{position:sticky;top:92px;display:flex;flex-direction:column;gap:20px;}
.help-card{background:var(--card);border:1px solid var(--border);border-radius:var(--r-lg);padding:24px;box-shadow:var(--shadow);}
.help-card h3{font-size:17px;font-weight:600;margin-bottom:14px;display:flex;align-items:center;gap:9px;}
.help-card h3 i{color:var(--brand-dark);}
.check-list li{display:flex;gap:10px;align-items:flex-start;font-size:14.5px;color:var(--muted);padding:7px 0;}
.check-list i{color:var(--brand-dark);font-size:13px;margin-top:6px;}
.rail-cta{background:linear-gradient(160deg,#0C3B34 0%,#0B8F6B 100%);color:#E9F3EF;border:0;}
.rail-cta h3{color:#fff;}
.rail-cta p{font-size:14px;color:rgba(233,243,239,.86);margin-bottom:16px;}
.rail-cta .btn{width:100%;}
.rail-cta .rail-meta{display:flex;justify-content:space-between;font-size:13px;color:rgba(233,243,239,.75);margin-top:14px;}
.rail-links a{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:11px 0;border-bottom:1px dashed var(--border);font-size:14.5px;color:var(--muted);
  transition:color .2s ease,transform .2s ease;
}
.rail-links a:last-child{border-bottom:0;}
.rail-links a:hover{color:var(--brand-dark);transform:translateX(3px);}
.rail-links a i{font-size:12px;color:var(--weak);}
.rail-hot{display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:600;color:#fff;background:var(--accent);padding:3px 10px;border-radius:999px;}

/* ---------- Flow ---------- */
.flow-band{background:var(--surface);}
.flow-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;}
.flow-step{background:#fff;border:1px solid var(--border);border-radius:var(--r-card);padding:24px;box-shadow:var(--shadow);transition:transform .22s ease,box-shadow .22s ease;}
.flow-step:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);}
.flow-num{
  width:38px;height:38px;border-radius:12px;background:var(--grad);color:#fff;
  display:flex;align-items:center;justify-content:center;font-weight:700;font-size:16px;margin-bottom:14px;
}
.flow-step h3{font-size:16.5px;font-weight:600;margin-bottom:8px;}
.flow-step p{font-size:14.5px;color:var(--muted);margin:0;}

/* ---------- Spec ---------- */
.spec-wrap{display:grid;grid-template-columns:minmax(0,1fr) 380px;gap:32px;align-items:center;}
.spec-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;}
.spec-card{background:#fff;border:1px solid var(--border);border-radius:var(--r-md);padding:20px;box-shadow:var(--shadow);}
.spec-card .label{font-size:13px;color:var(--weak);margin-bottom:6px;}
.spec-card .value{font-size:19px;font-weight:700;color:var(--brand-deep);letter-spacing:.01em;}
.spec-card .value small{font-size:13px;font-weight:500;color:var(--muted);margin-left:4px;}
.spec-rows{margin-top:20px;background:#fff;border:1px solid var(--border);border-radius:var(--r-md);overflow:hidden;}
.spec-row{display:flex;justify-content:space-between;gap:16px;padding:13px 20px;font-size:14.5px;border-bottom:1px solid var(--border);}
.spec-row:last-child{border-bottom:0;}
.spec-row span:first-child{color:var(--muted);}
.spec-row span:last-child{font-weight:600;color:var(--brand-deep);}
.spec-figure img{width:100%;aspect-ratio:4/3;border:1px solid var(--border);box-shadow:var(--shadow);}

/* ---------- Category cards ---------- */
.cat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.cat-card{
  background:#fff;border:1px solid var(--border);border-radius:var(--r-lg);overflow:hidden;
  box-shadow:var(--shadow);transition:transform .22s ease,box-shadow .22s ease;display:flex;flex-direction:column;
}
.cat-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);}
.cat-card img{width:100%;aspect-ratio:16/10;border-radius:0;}
.cat-body{padding:22px;display:flex;flex-direction:column;gap:10px;flex:1 1 auto;}
.cat-body .tag{align-self:flex-start;font-size:12.5px;font-weight:600;color:var(--brand-dark);background:var(--surface);padding:4px 11px;border-radius:999px;}
.cat-body h3{font-size:17px;font-weight:600;}
.cat-body p{font-size:14.5px;color:var(--muted);margin:0;}
.cat-body .more{margin-top:auto;font-size:14px;font-weight:600;color:var(--brand-dark);display:inline-flex;align-items:center;gap:6px;}
.cat-card:hover .more i{transform:translateX(3px);}
.cat-body .more i{transition:transform .22s ease;font-size:12px;}

/* ---------- CTA band ---------- */
.cta-band{background:var(--grad);color:#fff;padding:52px 0;}
.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;}
.cta-inner h2{color:#fff;font-size:26px;font-weight:700;}
.cta-inner p{margin:10px 0 0;color:rgba(255,255,255,.9);font-size:15px;max-width:640px;}
.cta-band .btn-ghost{background:#fff;color:var(--brand-dark);border-color:transparent;}
.cta-band .btn-ghost:hover{background:#F0FAF7;}

/* ---------- Footer ---------- */
.site-footer{background:var(--brand-deep);color:#E9F3EF;padding:60px 0 26px;margin-top:0;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:32px;}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
.footer-brand .brand-text{color:#fff;}
.footer-desc{font-size:14px;color:rgba(233,243,239,.72);line-height:1.8;max-width:340px;}
.footer-col h4{font-size:15px;font-weight:600;color:#fff;margin-bottom:14px;}
.footer-col a{display:block;font-size:14px;color:rgba(233,243,239,.74);padding:6px 0;transition:color .2s ease,transform .2s ease;}
.footer-col a:hover{color:var(--brand-light);transform:translateX(3px);}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  margin-top:38px;padding-top:20px;border-top:1px solid rgba(233,243,239,.16);
  font-size:13px;color:rgba(233,243,239,.62);
}

/* ---------- Mobile tab ---------- */
.mobile-tab{
  display:none;position:fixed;left:0;right:0;bottom:0;z-index:130;
  background:rgba(255,255,255,.96);backdrop-filter:blur(8px);
  border-top:1px solid var(--border);
  padding:6px 4px calc(6px + env(safe-area-inset-bottom));
  box-shadow:0 -6px 20px rgba(12,59,52,.07);
}
.mobile-tab ul{display:grid;grid-template-columns:repeat(5,1fr);}
.mobile-tab a{
  position:relative;display:flex;flex-direction:column;align-items:center;gap:3px;
  font-size:10.5px;color:var(--weak);padding:6px 2px;border-radius:10px;
}
.mobile-tab a i{font-size:19px;line-height:1;}
.mobile-tab a.active{color:var(--brand-dark);font-weight:600;}
.mobile-tab a.active::before{
  content:"";position:absolute;top:-6px;left:50%;transform:translateX(-50%);
  width:26px;height:3px;border-radius:0 0 3px 3px;background:var(--grad);
}

/* ---------- Responsive ---------- */
@media (max-width:1023px){
  .container{padding:0 24px;}
  .layout{grid-template-columns:1fr;}
  .side-rail{position:static;}
  .flow-grid{grid-template-columns:repeat(2,1fr);}
  .spec-wrap{grid-template-columns:1fr;}
  .cat-grid{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:1fr 1fr;}
  .view-banner h1{font-size:34px;}
}
@media (max-width:767px){
  body{padding-bottom:76px;}
  .container{padding:0 18px;}
  .main-nav,.header-cta{display:none;}
  .header-inner{height:62px;}
  .mobile-tab{display:block;}
  .section{padding:48px 0;}
  .section.tight{padding:40px 0;}
  .section-title{font-size:22px;}
  .view-banner h1{font-size:28px;}
  .banner-inner{padding:38px 0 44px;}
  .banner-sub{font-size:15px;}
  .issue-group{padding:20px;border-radius:var(--r-card);}
  .group-desc{margin-left:0;}
  .flow-grid,.spec-grid,.cat-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;gap:22px;}
  .cta-inner h2{font-size:22px;}
  .cta-band .btn{width:100%;}
}
@media (max-width:520px){
  .banner-actions .btn{width:100%;}
  .brand-text{font-size:15.5px;}
  .spec-row{flex-direction:column;gap:2px;}
  .rail-cta .rail-meta{flex-direction:column;gap:4px;}
}