/* roulang page: index */
/* ============ 设计变量 ============ */
:root{
  --brand:#0D6E62;
  --brand-strong:#095048;
  --brand-soft:#E7F1EE;
  --accent:#F1713B;
  --ink:#0B0F0E;
  --text:#3B4442;
  --muted:#8A928F;
  --bg:#F6F7F5;
  --surface:#FFFFFF;
  --line:#E3E7E4;
  --danger:#C0392B;
  --radius-s:8px;
  --radius-m:14px;
  --radius-l:22px;
  --radius-pill:999px;
  --shadow-1:0 1px 2px rgba(11,15,14,.04),0 8px 24px rgba(11,15,14,.05);
  --shadow-2:0 18px 48px rgba(11,15,14,.10);
  --maxw:1200px;
  --gutter:clamp(20px,4vw,48px);
  --ease:cubic-bezier(.2,.7,.3,1);
  --font:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
}
/* ============ 基础层 ============ */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.8;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{margin:0;color:var(--ink);font-weight:700;letter-spacing:-.015em}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
input{font:inherit}
svg{display:block}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 var(--gutter)}
.text-num{font-variant-numeric:tabular-nums;font-weight:600}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 22px;border-radius:var(--radius-pill);
  font-size:15px;font-weight:600;letter-spacing:.01em;
  transition:background-color .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease),box-shadow .18s var(--ease);
  white-space:nowrap;
}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:var(--brand-strong);transform:translateY(-1px);box-shadow:var(--shadow-1)}
.btn-accent{background:var(--accent);color:#fff}
.btn-accent:hover{background:#DE6029;transform:translateY(-1px);box-shadow:var(--shadow-1)}
.btn-ghost{border:1.5px solid var(--line);color:var(--ink);background:transparent}
.btn-ghost:hover{border-color:var(--brand);background:var(--brand-soft);color:var(--brand-strong)}
.btn-ghost-light{border:1.5px solid rgba(255,255,255,.55);color:#fff}
.btn-ghost-light:hover{background:rgba(255,255,255,.14);border-color:#fff}
.btn-lg{min-height:50px;padding:0 30px;font-size:16px}
.btn-sm{min-height:38px;padding:0 18px;font-size:14px}
.text-link{color:var(--brand);font-size:14px;font-weight:600;text-decoration:underline;text-underline-offset:4px;text-decoration-thickness:1px;transition:color .18s var(--ease),text-decoration-thickness .18s var(--ease)}
.text-link:hover{color:var(--brand-strong);text-decoration-thickness:2px}

/* ============ 导航 ============ */
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(246,247,245,.92);
  border-bottom:1px solid var(--line);
  transition:background-color .18s var(--ease),box-shadow .18s var(--ease);
}
.site-header.is-scrolled{background:var(--surface);box-shadow:var(--shadow-1);backdrop-filter:blur(8px)}
.header-inner{display:flex;align-items:center;gap:24px;height:64px}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{width:30px;height:30px;border-radius:9px;background:var(--brand);display:flex;align-items:center;justify-content:center;color:#fff}
.brand-text{font-size:17px;font-weight:700;color:var(--ink);letter-spacing:-.01em;white-space:nowrap}
.main-nav{display:flex;align-items:center;gap:26px;margin-left:8px}
.nav-link{position:relative;font-size:14px;font-weight:500;color:var(--text);padding:6px 0;transition:color .16s var(--ease)}
.nav-link::after{content:"";position:absolute;left:0;right:0;bottom:0;height:1px;background:var(--ink);transform:scaleX(0);transform-origin:left;transition:transform .16s var(--ease)}
.nav-link:hover{color:var(--ink)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.is-active{color:var(--ink);font-weight:600}
.nav-link.is-active::before{content:"";position:absolute;left:50%;bottom:-3px;width:20px;height:2px;background:var(--brand);border-radius:2px;transform:translateX(-50%)}
.header-actions{display:flex;align-items:center;gap:14px;margin-left:auto}
.search-box{display:flex;align-items:center;gap:8px;height:36px;width:200px;padding:0 10px 0 12px;border:1px solid var(--line);border-radius:var(--radius-pill);background:var(--surface);transition:width .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease)}
.search-box:focus-within{width:260px;border:1.5px solid var(--brand);box-shadow:0 0 0 4px rgba(13,110,98,.12)}
.search-box svg{color:var(--muted);flex-shrink:0}
.search-box input{flex:1;min-width:0;border:0;background:transparent;font-size:13px;color:var(--ink);outline:none}
.search-box input::placeholder{color:var(--muted)}
.search-box kbd{font-family:var(--font);font-size:11px;color:var(--muted);border:1px solid var(--line);border-radius:5px;padding:0 5px;line-height:18px;height:20px;display:inline-flex;align-items:center}
.header-link{font-size:14px;font-weight:500;color:var(--text);transition:color .16s var(--ease)}
.header-link:hover{color:var(--brand)}
.menu-toggle{display:none;width:44px;height:44px;align-items:center;justify-content:center;border-radius:var(--radius-s)}
.menu-toggle span{display:block;width:20px;height:1.6px;background:var(--ink);border-radius:2px;transition:transform .2s var(--ease),opacity .2s var(--ease)}
.menu-toggle span+span{margin-top:5px}
.menu-toggle.is-open span:nth-child(1){transform:translateY(6.6px) rotate(45deg)}
.menu-toggle.is-open span:nth-child(2){opacity:0}
.menu-toggle.is-open span:nth-child(3){transform:translateY(-6.6px) rotate(-45deg)}
.mobile-drawer{
  display:none;flex-direction:column;gap:4px;
  border-top:1px solid var(--line);background:var(--surface);
  padding:14px var(--gutter) 22px;
}
.mobile-drawer.is-open{display:flex;animation:drawerIn .2s var(--ease)}
@keyframes drawerIn{from{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:translateY(0)}}
.drawer-link{display:flex;align-items:center;justify-content:space-between;min-height:52px;font-size:15px;font-weight:500;color:var(--ink);border-bottom:1px solid var(--line)}
.drawer-link:last-of-type{border-bottom:0}
.drawer-link svg{color:var(--muted)}
.drawer-search{display:flex;align-items:center;gap:8px;height:44px;margin:8px 0 14px;padding:0 14px;border:1px solid var(--line);border-radius:var(--radius-m);background:var(--bg)}
.drawer-search input{flex:1;min-width:0;border:0;background:transparent;font-size:14px;outline:none;color:var(--ink)}
.drawer-cta{width:100%;margin-top:6px}

/* ============ Hero ============ */
.hero{padding:76px 0 84px;background:var(--source,var(--bg))}
.hero-grid{display:grid;grid-template-columns:7fr 5fr;gap:56px;align-items:center}
.hero-copy{padding-top:8px}
.hero h1{font-size:clamp(30px,4.6vw,56px);line-height:1.14;letter-spacing:-.02em;max-width:16em}
.hero h1 .hl{color:var(--brand)}
.hero-sub{margin-top:20px;font-size:18px;line-height:1.8;color:var(--text);max-width:32em}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:32px}
.hero-meta{display:flex;flex-wrap:wrap;align-items:center;gap:0;margin-top:28px;font-size:13px;color:var(--muted)}
.hero-meta li{display:flex;align-items:center}
.hero-meta li+li::before{content:"";width:1px;height:12px;background:var(--line);margin:0 14px}
.hero-meta b{color:var(--ink);font-weight:600}
.hero-visual{border-radius:var(--radius-l);overflow:hidden;box-shadow:var(--shadow-2);border:1px solid var(--line);background:var(--surface)}
.hero-visual img{width:100%;aspect-ratio:4/3;object-fit:cover}

/* ============ 板块基础 ============ */
.section{padding:96px 0}
.section-alt{background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{max-width:44em;margin-bottom:44px}
.section-head h2{font-size:clamp(24px,3.2vw,38px);line-height:1.2;letter-spacing:-.015em}
.section-head .section-desc{margin-top:14px;font-size:16px;line-height:1.8;color:var(--muted)}
.section-head-row{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;max-width:none}
.section-head-row .text-link{flex-shrink:0;padding-bottom:6px}

/* ============ 编号行式列表 ============ */
.value-list{border-top:1px solid var(--line)}
.value-row{display:flex;gap:32px;padding:28px 0;border-bottom:1px solid var(--line);position:relative;transition:padding-left .2s var(--ease)}
.value-row::before{content:"";position:absolute;left:0;top:26px;bottom:26px;width:3px;background:var(--brand);border-radius:2px;opacity:0;transition:opacity .2s var(--ease)}
.value-row:hover{padding-left:12px}
.value-row:hover::before{opacity:1}
.value-num{font-size:clamp(32px,3.4vw,48px);font-weight:800;line-height:1;color:var(--brand);letter-spacing:-.02em;font-variant-numeric:tabular-nums;flex:0 0 74px}
.value-content h3{font-size:20px;font-weight:600;line-height:1.4}
.value-content p{margin-top:10px;font-size:15px;line-height:1.75;color:var(--text);max-width:52em}

/* ============ 轮播 ============ */
.slider{margin-top:8px}
.slider-viewport{position:relative;overflow:hidden;border-radius:var(--radius-l);border:1px solid var(--line);box-shadow:var(--shadow-2);background:var(--bg)}
.slider-track{display:flex;transition:transform .42s var(--ease)}
.slide{flex:0 0 100%;margin:0}
.slide img{width:100%;aspect-ratio:16/10;object-fit:cover}
.slide figcaption{padding:16px 22px;font-size:14px;color:var(--muted);background:var(--surface);border-top:1px solid var(--line)}
.slider-btn{
  position:absolute;top:50%;transform:translateY(-50%);
  width:44px;height:44px;border-radius:50%;
  background:rgba(255,255,255,.9);border:1px solid var(--line);
  display:flex;align-items:center;justify-content:center;color:var(--ink);
  transition:background-color .18s var(--ease),color .18s var(--ease);
}
.slider-btn:hover{background:var(--brand);color:#fff;border-color:var(--brand)}
.slider-btn.prev{left:16px}
.slider-btn.next{right:16px}
.slider-foot{display:flex;align-items:center;justify-content:space-between;gap:16px;height:44px;margin-top:8px}
.slider-dots{display:flex;align-items:center;gap:8px}
.dot{width:6px;height:6px;border-radius:var(--radius-pill);background:var(--line);transition:width .2s var(--ease),background-color .2s var(--ease)}
.dot.is-active{width:24px;background:var(--brand)}
.slider-pause{font-size:13px;color:var(--muted);transition:color .16s var(--ease)}
.slider-pause:hover{color:var(--brand)}
.slider-thumbs{display:flex;gap:12px;margin-top:14px}
.thumb{flex:1;height:64px;border-radius:var(--radius-s);overflow:hidden;border:1px solid var(--line);transition:border-color .2s var(--ease),box-shadow .2s var(--ease)}
.thumb img{width:100%;height:100%;object-fit:cover}
.thumb.is-active{border:2px solid var(--brand)}
.thumb:hover{border-color:var(--brand)}

/* ============ 规格网格 ============ */
.spec-groups{display:grid;grid-template-columns:1fr 1fr;gap:28px}
.spec-group{position:relative;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-m);overflow:hidden}
.spec-badge{position:absolute;top:14px;right:14px;font-size:12px;font-weight:600;color:var(--brand-strong);background:var(--brand-soft);border-radius:var(--radius-pill);padding:2px 10px;line-height:1.5}
.spec-group h3{font-size:17px;padding:20px 24px 16px;border-bottom:1px solid var(--line)}
.spec-grid{display:grid;grid-template-columns:1fr 1fr}
.spec-item{padding:18px 24px;border-bottom:1px solid var(--line);border-right:1px solid var(--line)}
.spec-item:nth-child(2n){border-right:0}
.spec-item:nth-last-child(-n+2){border-bottom:0}
.spec-label{font-size:13px;color:var(--muted)}
.spec-value{margin-top:4px;font-size:16px;font-weight:600;color:var(--ink);font-variant-numeric:tabular-nums}

/* ============ 评价墙 ============ */
.review-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.review-col{display:flex;flex-direction:column;gap:24px}
.review-col.offset{margin-top:32px}
.review-card{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:24px;transition:transform .2s var(--ease),box-shadow .2s var(--ease)}
.review-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-1)}
.review-head{display:flex;align-items:center;gap:12px}
.avatar{width:40px;height:40px;border-radius:50%;background:var(--brand-soft);color:var(--brand-strong);display:flex;align-items:center;justify-content:center;font-weight:700;font-size:15px;flex-shrink:0}
.review-name{font-size:14px;font-weight:600;color:var(--ink)}
.review-meta{font-size:12px;color:var(--muted)}
.stars{margin-top:14px;display:flex;gap:3px;color:var(--accent)}
.review-text{margin-top:10px;font-size:15px;line-height:1.75;color:var(--text);display:-webkit-box;-webkit-line-clamp:4;-webkit-box-orient:vertical;overflow:hidden}

/* ============ 深色 CTA ============ */
.cta-panel{
  background:var(--brand-strong);color:#fff;border-radius:var(--radius-l);
  padding:56px;display:grid;grid-template-columns:1fr auto;gap:48px;align-items:center;
}
.cta-panel h2{color:#fff;font-size:clamp(22px,2.6vw,32px);line-height:1.25;letter-spacing:-.015em;max-width:18em}
.cta-panel p.cta-desc{margin-top:14px;font-size:15px;line-height:1.8;color:rgba(255,255,255,.82);max-width:36em}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.cta-check{margin-top:26px;display:flex;flex-wrap:wrap;gap:8px 22px;font-size:13px;color:rgba(255,255,255,.72);font-variant-numeric:tabular-nums}
.cta-qr{display:flex;flex-direction:column;align-items:center;gap:12px}
.qr-box{width:96px;height:96px;border-radius:12px;background:#fff;padding:8px}
.qr-box svg{width:100%;height:100%}
.qr-note{font-size:12px;color:rgba(255,255,255,.72)}

/* ============ 资讯列表 ============ */
.news-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.news-card{display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-m);overflow:hidden;transition:transform .2s var(--ease),box-shadow .2s var(--ease)}
.news-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-1)}
.news-thumb{overflow:hidden;background:var(--brand-soft)}
.news-thumb img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .22s var(--ease)}
.news-card:hover .news-thumb img{transform:scale(1.03)}
.news-body{display:flex;flex-direction:column;gap:10px;padding:18px;flex:1}
.tag{align-self:flex-start;font-size:12px;font-weight:600;letter-spacing:.04em;color:var(--brand-strong);background:var(--brand-soft);border-radius:var(--radius-pill);padding:3px 10px;line-height:1.4}
.news-body h3{font-size:17px;font-weight:600;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;transition:color .18s var(--ease)}
.news-card:hover .news-body h3{color:var(--brand)}
.news-summary{font-size:14px;line-height:1.75;color:var(--muted);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-foot{margin-top:auto;padding-top:12px;display:flex;align-items:center;justify-content:space-between;font-size:12px;color:var(--muted)}
.news-foot span{color:var(--brand);font-weight:600}
.empty-state{display:flex;flex-direction:column;align-items:center;gap:14px;padding:64px 20px;border:1px dashed var(--line);border-radius:var(--radius-m);background:var(--surface);text-align:center}
.empty-state svg{color:var(--muted)}
.empty-state p{font-size:14px;color:var(--muted)}

/* ============ FAQ ============ */
.faq-list{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item summary{
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:22px 0;font-size:16px;font-weight:600;color:var(--ink);cursor:pointer;list-style:none;
  transition:color .18s var(--ease);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--brand)}
.faq-icon{flex-shrink:0;width:24px;height:24px;position:relative;color:var(--brand)}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;background:currentColor;border-radius:2px}
.faq-icon::before{left:2px;right:2px;top:11px;height:1.6px}
.faq-icon::after{top:2px;bottom:2px;left:11px;width:1.6px;transition:transform .18s var(--ease),opacity .18s var(--ease)}
.faq-item[open] .faq-icon::after{transform:scaleY(0);opacity:0}
.faq-item[open] summary{color:var(--brand)}
.faq-answer{padding:0 46px 24px 0;font-size:15px;line-height:1.8;color:var(--text);max-width:56em}

/* ============ 页脚 ============ */
.site-footer{background:var(--ink);color:rgba(255,255,255,.72);padding:72px 0 0;margin-top:96px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px}
.footer-brand .brand-text{color:#fff}
.footer-brand p{margin-top:16px;font-size:14px;line-height:1.8;max-width:20em}
.footer-contact{margin-top:14px;font-size:13px;color:rgba(255,255,255,.6)}
.footer-col h4{font-size:14px;font-weight:600;color:#fff;margin-bottom:16px}
.footer-links{display:flex;flex-direction:column;gap:12px}
.footer-links a{font-size:14px;transition:color .16s var(--ease),text-decoration-color .16s var(--ease);text-decoration:underline;text-decoration-color:transparent;text-underline-offset:4px}
.footer-links a:hover{color:#fff;text-decoration-color:#fff}
.footer-bottom{margin-top:52px;padding:22px 0;border-top:1px solid rgba(255,255,255,.1);display:flex;flex-wrap:wrap;gap:10px 24px;align-items:center;justify-content:space-between;font-size:13px;color:rgba(255,255,255,.55)}

/* ============ 滚动入场 ============ */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .42s var(--ease),transform .42s var(--ease)}
.reveal.is-visible{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important}
  .reveal{opacity:1;transform:none}
}

/* ============ 响应式 ============ */
@media (max-width:1023px){
  .hero-grid{grid-template-columns:1fr;gap:40px}
  .hero{padding:56px 0 64px}
  .section{padding:80px 0}
  .news-grid{grid-template-columns:repeat(2,1fr)}
  .spec-groups{grid-template-columns:1fr}
  .cta-panel{grid-template-columns:1fr;padding:40px;gap:32px}
  .cta-qr{align-items:flex-start}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px}
  .main-nav,.header-link,.search-box{display:none}
  .menu-toggle{display:flex}
}
@media (max-width:767px){
  .header-inner{height:56px;gap:12px}
  .hero{padding:44px 0 56px}
  .hero-sub{font-size:17px}
  .hero-actions{flex-direction:column;align-items:stretch}
  .hero-actions .btn{width:100%}
  .hero-meta{gap:6px 0}
  .hero-meta li+li::before{margin:0 10px}
  .section{padding:64px 0}
  .section-head{margin-bottom:32px}
  .section-head-row{flex-direction:column;align-items:flex-start;gap:10px}
  .value-row{gap:18px;padding:22px 0}
  .value-num{flex:0 0 48px;font-size:30px}
  .slide img{aspect-ratio:4/3}
  .slider-thumbs{display:none}
  .review-grid{grid-template-columns:1fr}
  .review-col.offset{margin-top:0}
  .news-grid{grid-template-columns:1fr}
  .spec-grid{grid-template-columns:1fr}
  .spec-item{border-right:0}
  .spec-item:nth-last-child(-n+2){border-bottom:1px solid var(--line)}
  .spec-item:last-child{border-bottom:0}
  .cta-panel{padding:28px 22px}
  .cta-actions{flex-direction:column;align-items:stretch}
  .cta-actions .btn{width:100%}
  .cta-qr{align-items:center;width:100%}
  .faq-answer{padding-right:0}
  .site-footer{margin-top:64px;padding-top:52px}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}
@media (max-width:520px){
  .brand-text{font-size:16px}
  .hero h1{font-size:30px}
  .slider-btn{width:40px;height:40px}
  .review-card{padding:20px}
}

/* roulang page: article */
:root{
  --brand:#0D6E62;
  --brand-strong:#095048;
  --brand-soft:#E7F1EE;
  --accent:#F1713B;
  --ink:#0B0F0E;
  --text:#3B4442;
  --muted:#8A928F;
  --bg:#F6F7F5;
  --surface:#FFFFFF;
  --line:#E3E7E4;
  --radius-s:8px;
  --radius-m:14px;
  --radius-l:22px;
  --radius-pill:999px;
  --shadow-1:0 1px 2px rgba(11,15,14,.04),0 8px 24px rgba(11,15,14,.05);
  --shadow-2:0 18px 48px rgba(11,15,14,.10);
  --maxw:1200px;
  --gutter:clamp(20px,4vw,48px);
  --ease:cubic-bezier(.2,.7,.3,1);
  --font: "PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.8;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;}
a{color:inherit;text-decoration:none;}
button{font-family:inherit;cursor:pointer;border:0;background:none;color:inherit;}
input{font-family:inherit;}
h1,h2,h3,h4{margin:0;color:var(--ink);font-weight:700;letter-spacing:-.015em;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px;}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 var(--gutter);}

/* ---------- Header / Nav ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(255,255,255,.9);
  border-bottom:1px solid var(--line);
  backdrop-filter:blur(8px);
  transition:box-shadow .18s var(--ease),background .18s var(--ease);
}
.site-header.is-scrolled{background:rgba(255,255,255,.96);box-shadow:var(--shadow-1);}
.nav-wrap{display:flex;align-items:center;gap:24px;min-height:64px;}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand-mark{
  width:32px;height:32px;border-radius:10px;background:var(--brand);color:#fff;
  display:inline-flex;align-items:center;justify-content:center;flex:0 0 auto;
}
.brand-text{font-size:17px;font-weight:700;letter-spacing:-.01em;color:var(--ink);white-space:nowrap;}
.main-nav{display:flex;align-items:center;gap:26px;margin-left:8px;}
.nav-link{
  position:relative;font-size:14px;font-weight:500;color:var(--text);
  padding:6px 0;transition:color .18s var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:1px;background:var(--ink);
  transform:scaleX(0);transform-origin:left;transition:transform .16s var(--ease);
}
.nav-link:hover{color:var(--ink);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.is-active{color:var(--ink);font-weight:600;}
.nav-link.is-active::after{height:2px;background:var(--brand);width:20px;left:50%;right:auto;transform:translateX(-50%) scaleX(1);}
.nav-actions{display:flex;align-items:center;gap:14px;margin-left:auto;}
.search-box{
  display:flex;align-items:center;gap:8px;
  height:36px;width:200px;padding:0 10px 0 12px;
  border:1px solid var(--line);border-radius:var(--radius-pill);
  background:var(--surface);color:var(--muted);
  transition:width .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.search-box svg{flex:0 0 auto;color:var(--muted);}
.search-box input{
  flex:1 1 auto;min-width:0;border:0;background:transparent;font-size:13px;color:var(--ink);outline:none;
}
.search-box input::placeholder{color:var(--muted);}
.search-box:focus-within{
  width:260px;border-color:var(--brand);
  box-shadow:0 0 0 4px rgba(13,110,98,.12);
}
.kbd{
  flex:0 0 auto;height:20px;padding:0 6px;border:1px solid var(--line);border-radius:6px;
  font-size:11px;line-height:18px;color:var(--muted);background:var(--bg);
}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 22px;border-radius:var(--radius-pill);
  font-size:14px;font-weight:600;color:#fff;background:var(--brand);
  transition:background .18s var(--ease),transform .18s var(--ease),box-shadow .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.btn:hover{background:var(--brand-strong);transform:translateY(-1px);box-shadow:var(--shadow-1);}
.btn:active{transform:translateY(0);}
.btn-sm{height:36px;padding:0 18px;font-size:13px;}
.btn-outline{background:transparent;color:var(--brand);border:1.5px solid var(--brand);}
.btn-outline:hover{background:var(--brand-soft);color:var(--brand-strong);}
.btn-accent{background:var(--accent);}
.btn-accent:hover{background:#DE5F2B;}
.btn-light{background:#fff;color:var(--brand);}
.btn-light:hover{background:#F1F5F4;color:var(--brand-strong);}
.btn-ghost-light{background:transparent;color:#fff;border:1.5px solid rgba(255,255,255,.6);}
.btn-ghost-light:hover{background:rgba(255,255,255,.12);border-color:#fff;}
.link-arrow{
  display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--brand);
  text-decoration:underline;text-underline-offset:4px;text-decoration-thickness:1px;
  transition:color .18s var(--ease);
}
.link-arrow:hover{color:var(--brand-strong);text-decoration-thickness:2px;}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:12px;align-items:center;justify-content:center;
  border:1px solid var(--line);background:var(--surface);
}
.nav-toggle span{display:block;width:18px;height:1.5px;background:var(--ink);border-radius:2px;position:relative;transition:background .16s var(--ease);}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:1.5px;background:var(--ink);border-radius:2px;
  transition:transform .18s var(--ease),top .18s var(--ease);
}
.nav-toggle span::before{top:-6px;}
.nav-toggle span::after{top:6px;}
.nav-toggle.is-active span{background:transparent;}
.nav-toggle.is-active span::before{top:0;transform:rotate(45deg);}
.nav-toggle.is-active span::after{top:0;transform:rotate(-45deg);}
.nav-drawer{
  display:none;border-top:1px solid var(--line);background:var(--surface);
  padding:8px var(--gutter) 24px;
}
.nav-drawer.is-open{display:block;animation:drawerIn .2s var(--ease);}
@keyframes drawerIn{from{opacity:0;transform:translateY(-8px);}to{opacity:1;transform:translateY(0);}}
.drawer-link{
  display:flex;align-items:center;justify-content:space-between;
  min-height:52px;border-bottom:1px solid var(--line);font-size:15px;font-weight:500;color:var(--ink);
}
.drawer-link svg{color:var(--muted);}
.drawer-search{display:flex;align-items:center;gap:8px;height:44px;margin:16px 0 14px;padding:0 14px;border:1px solid var(--line);border-radius:var(--radius-pill);background:var(--bg);}
.drawer-search input{flex:1;border:0;background:transparent;font-size:14px;outline:none;color:var(--ink);}
.drawer-cta{width:100%;}

/* ---------- Breadcrumb / Article hero ---------- */
.article-hero{
  position:relative;overflow:hidden;background:var(--surface);
  border-bottom:1px solid var(--line);
}
.article-hero::after{
  content:"";position:absolute;inset:0;
  background:url("/assets/images/backpic/back-1.webp") center/cover no-repeat;
  opacity:.06;pointer-events:none;
}
.article-head{position:relative;z-index:1;padding-top:28px;padding-bottom:44px;}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--muted);}
.breadcrumb a{color:var(--muted);transition:color .18s var(--ease);}
.breadcrumb a:hover{color:var(--brand);}
.breadcrumb .sep{color:#C6CCC9;}
.breadcrumb .current{color:var(--ink);max-width:32ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.badge{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:var(--radius-pill);
  background:var(--brand-soft);color:var(--brand-strong);font-size:12px;font-weight:600;letter-spacing:.04em;
}
.article-head .badge{margin:22px 0 16px;}
.article-title{
  font-size:clamp(26px,3.4vw,40px);line-height:1.25;letter-spacing:-.02em;
  max-width:24em;color:var(--ink);
}
.article-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:12px;
  margin-top:20px;font-size:13px;color:var(--muted);
}
.article-meta .dot{width:1px;height:12px;background:var(--line);display:inline-block;}
.article-meta a{color:var(--muted);}
.article-meta a:hover{color:var(--brand);}

/* ---------- Layout ---------- */
.article-layout{
  display:grid;grid-template-columns:minmax(0,1fr) 296px;
  gap:56px;align-items:start;padding-top:56px;padding-bottom:96px;
}
.article-main{min-width:0;}
.article-body{
  max-width:760px;font-size:17px;line-height:1.9;color:var(--text);
  word-wrap:break-word;overflow-wrap:break-word;
}
.article-body>*:first-child{margin-top:0;}
.article-body p{margin:0 0 1.2em;}
.article-body h2{
  position:relative;font-size:clamp(20px,2.2vw,26px);line-height:1.4;font-weight:700;
  color:var(--ink);margin:44px 0 16px;padding-left:14px;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.42em;width:3px;height:18px;border-radius:2px;background:var(--brand);
}
.article-body h3{font-size:18px;line-height:1.5;font-weight:600;color:var(--ink);margin:28px 0 12px;}
.article-body h4{font-size:16px;font-weight:600;color:var(--ink);margin:22px 0 10px;}
.article-body ul,.article-body ol{padding-left:1.35em;margin:0 0 1.2em;}
.article-body ul{list-style:disc;}
.article-body ol{list-style:decimal;}
.article-body li{margin:.5em 0;line-height:1.8;}
.article-body li::marker{color:var(--brand);font-weight:600;}
.article-body blockquote{
  margin:1.4em 0;padding:18px 20px;background:var(--brand-soft);
  border-left:3px solid var(--brand);border-radius:0 var(--radius-s) var(--radius-s) 0;
  color:var(--text);
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body img{border-radius:var(--radius-m);margin:1.6em auto;box-shadow:var(--shadow-1);}
.article-body figure{margin:1.6em 0;}
.article-body figcaption{font-size:13px;color:var(--muted);text-align:center;margin-top:10px;}
.article-body a{color:var(--brand);text-decoration:underline;text-underline-offset:4px;}
.article-body a:hover{color:var(--brand-strong);}
.article-body strong{color:var(--ink);font-weight:600;}
.article-body hr{border:0;border-top:1px solid var(--line);margin:2.4em 0;}
.article-body code{
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:14px;
  background:var(--bg);border:1px solid var(--line);border-radius:8px;padding:2px 6px;
}
.article-body pre{
  background:var(--bg);border:1px solid var(--line);border-radius:var(--radius-m);
  padding:18px;overflow:auto;margin:1.4em 0;
}
.article-body pre code{border:0;background:none;padding:0;}
.article-body table{width:100%;border-collapse:collapse;margin:1.4em 0;font-size:15px;}
.article-body th,.article-body td{border:1px solid var(--line);padding:12px 14px;text-align:left;}
.article-body th{background:var(--brand-soft);color:var(--ink);font-weight:600;}
.article-body tbody tr:nth-child(even){background:var(--bg);}

/* ---------- Aside ---------- */
.article-aside{position:sticky;top:92px;display:flex;flex-direction:column;gap:20px;}
.side-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-m);padding:20px;
}
.side-card h3{font-size:14px;font-weight:600;letter-spacing:.04em;color:var(--ink);margin-bottom:14px;}
.toc-list{display:flex;flex-direction:column;gap:2px;border-left:2px solid var(--line);}
.toc-link{
  display:block;padding:7px 0 7px 12px;margin-left:-2px;border-left:2px solid transparent;
  font-size:13.5px;line-height:1.6;color:var(--text);
  transition:color .18s var(--ease),border-color .18s var(--ease);
  overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
}
.toc-link:hover{color:var(--brand);border-left-color:var(--brand);}
.side-entry{display:flex;flex-direction:column;gap:10px;}
.side-entry a{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  font-size:14px;color:var(--text);padding:10px 12px;border:1px solid var(--line);
  border-radius:var(--radius-s);transition:all .18s var(--ease);
}
.side-entry a:hover{border-color:var(--brand);color:var(--brand);background:var(--brand-soft);}
.side-entry svg{flex:0 0 auto;color:var(--muted);}
.side-meta{font-size:13px;color:var(--muted);line-height:1.9;}
.side-meta b{display:block;color:var(--ink);font-weight:600;font-size:14px;}

/* ---------- Tags / Post nav / Related ---------- */
.tag-row{display:flex;flex-wrap:wrap;gap:10px;margin:44px 0 0;padding-top:24px;border-top:1px solid var(--line);}
.tag{
  display:inline-flex;align-items:center;height:28px;padding:0 12px;border-radius:var(--radius-pill);
  background:var(--brand-soft);color:var(--brand-strong);font-size:12px;font-weight:600;letter-spacing:.04em;
}
.post-nav{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:32px;}
.post-nav-card{
  display:flex;flex-direction:column;gap:6px;padding:20px;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--radius-m);
  transition:transform .18s var(--ease),box-shadow .18s var(--ease),border-color .18s var(--ease);
}
.post-nav-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-1);border-color:#CFD8D5;}
.post-nav-card span{font-size:13px;color:var(--muted);}
.post-nav-card strong{font-size:15px;font-weight:600;color:var(--ink);}

.related{margin-top:56px;}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:24px;}
.section-head h2{font-size:clamp(20px,2.2vw,26px);line-height:1.3;letter-spacing:-.015em;}
.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
.card{
  display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius-m);overflow:hidden;
  transition:transform .18s var(--ease),box-shadow .18s var(--ease);
}
.card:hover{transform:translateY(-2px);box-shadow:var(--shadow-1);}
.card-media{aspect-ratio:16/9;overflow:hidden;background:var(--brand-soft);}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .22s var(--ease);}
.card:hover .card-media img{transform:scale(1.03);}
.card-body{padding:18px 20px 22px;display:flex;flex-direction:column;gap:10px;flex:1;}
.card h3{font-size:17px;line-height:1.5;font-weight:600;}
.card p{font-size:14px;line-height:1.75;color:var(--muted);}
.card-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;font-size:12px;color:var(--muted);}
.card-foot .go{color:var(--brand);font-weight:600;}

/* ---------- CTA band ---------- */
.cta-band{
  background:var(--brand-strong);color:#fff;border-radius:var(--radius-l);
  padding:44px 48px;display:flex;align-items:center;gap:36px;flex-wrap:wrap;
  margin-bottom:0;
}
.cta-band h2{color:#fff;font-size:clamp(20px,2.2vw,28px);line-height:1.3;}
.cta-band p{color:rgba(255,255,255,.78);font-size:15px;margin-top:8px;}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap;margin-left:auto;}
.cta-note{
  width:100%;display:flex;flex-wrap:wrap;gap:20px;
  padding-top:22px;margin-top:6px;border-top:1px solid rgba(255,255,255,.14);
  font-size:13px;color:rgba(255,255,255,.72);
  font-variant-numeric:tabular-nums;
}
.cta-section{padding-bottom:96px;}

/* ---------- Empty state ---------- */
.empty-state{
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:16px;
  text-align:center;padding:64px 24px;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--radius-m);
}
.empty-state svg{color:var(--muted);}
.empty-state p{font-size:15px;color:var(--muted);}

/* ---------- Footer ---------- */
.site-footer{background:var(--ink);color:rgba(255,255,255,.72);padding:72px 0 32px;margin-top:0;}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;}
.footer-brand .brand-text{color:#fff;}
.footer-brand .brand-mark{background:var(--brand);}
.footer-brand p{font-size:14px;line-height:1.8;margin-top:16px;max-width:26em;}
.footer-contact{margin-top:14px;font-size:13px;color:rgba(255,255,255,.5);}
.footer-col h4{color:#fff;font-size:14px;font-weight:600;letter-spacing:.04em;margin-bottom:16px;}
.footer-links{display:flex;flex-direction:column;gap:11px;}
.footer-links a{font-size:14px;color:rgba(255,255,255,.7);transition:color .18s var(--ease);}
.footer-links a:hover{color:#fff;text-decoration:underline;text-underline-offset:4px;}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  margin-top:56px;padding-top:24px;border-top:1px solid rgba(255,255,255,.1);
  font-size:13px;color:rgba(255,255,255,.5);
}

/* ---------- Responsive ---------- */
@media (max-width:1279px){
  .article-layout{grid-template-columns:minmax(0,1fr) 260px;gap:40px;}
}
@media (max-width:1024px){
  .main-nav,.nav-actions{display:none;}
  .nav-toggle{display:inline-flex;margin-left:auto;}
  .article-layout{grid-template-columns:minmax(0,1fr);gap:32px;padding-bottom:72px;}
  .article-aside{display:none;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:768px){
  .nav-wrap{min-height:56px;}
  .article-head{padding-top:20px;padding-bottom:32px;}
  .article-layout{padding-top:40px;padding-bottom:64px;}
  .article-body{font-size:16px;line-height:1.85;}
  .card-grid{grid-template-columns:1fr 1fr;gap:18px;}
  .post-nav{grid-template-columns:1fr;}
  .cta-band{padding:32px 24px;gap:20px;}
  .cta-actions{margin-left:0;width:100%;}
  .cta-actions .btn{flex:1 1 100%;}
  .cta-section{padding-bottom:64px;}
  .site-footer{padding:48px 0 28px;}
}
@media (max-width:520px){
  .card-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;gap:8px;}
  .btn{width:100%;}
  .nav-toggle{width:44px;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important;}
}

/* roulang page: category1 */
:root{
  --brand:#0D6E62;
  --brand-strong:#095048;
  --brand-soft:#E7F1EE;
  --accent:#F1713B;
  --ink:#0B0F0E;
  --text:#3B4442;
  --muted:#8A928F;
  --bg:#F6F7F5;
  --surface:#FFFFFF;
  --line:#E3E7E4;
  --radius-s:8px;
  --radius-m:14px;
  --radius-l:22px;
  --radius-pill:999px;
  --shadow-1:0 1px 2px rgba(11,15,14,.04),0 8px 24px rgba(11,15,14,.05);
  --shadow-2:0 18px 48px rgba(11,15,14,.10);
  --maxw:1200px;
  --gutter:clamp(20px,4vw,48px);
  --ease:cubic-bezier(.2,.7,.3,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--text);
  background:var(--bg);
  overflow-x:hidden;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
button,input{font:inherit;color:inherit}
button{background:none;border:0;cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
svg{display:block}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px}
::selection{background:var(--brand-soft);color:var(--brand-strong)}

.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 var(--gutter)}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(255,255,255,.92);
  border-bottom:1px solid var(--line);
  backdrop-filter:blur(8px);
  transition:box-shadow .18s var(--ease),background .18s var(--ease);
}
.site-header.is-scrolled{background:var(--surface);box-shadow:var(--shadow-1)}
.header-inner{display:flex;align-items:center;gap:24px;height:64px}
.brand{display:inline-flex;align-items:center;gap:10px;font-size:17px;font-weight:700;letter-spacing:-.01em;color:var(--ink);white-space:nowrap}
.brand-mark{
  display:grid;place-items:center;width:32px;height:32px;border-radius:10px;
  background:var(--brand);color:#fff;flex:none;
}
.main-nav{display:flex;align-items:center;gap:26px;margin-left:6px}
.nav-link{position:relative;font-size:14px;font-weight:500;color:var(--text);padding:8px 0;transition:color .18s var(--ease)}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:2px;height:1px;background:var(--ink);
  transform:scaleX(0);transform-origin:left;transition:transform .16s var(--ease);
}
.nav-link:hover{color:var(--ink)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.is-active{color:var(--ink)}
.nav-link.is-active::after{display:none}
.nav-link.is-active::before{
  content:"";position:absolute;left:50%;bottom:-8px;width:20px;height:2px;border-radius:2px;
  background:var(--brand);transform:translateX(-50%);
}
.header-tools{margin-left:auto;display:flex;align-items:center;gap:14px}
.command-search{
  display:flex;align-items:center;gap:8px;height:36px;width:200px;padding:0 10px;
  border:1px solid var(--line);border-radius:var(--radius-pill);background:var(--surface);
  transition:width .2s var(--ease),border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.command-search:focus-within{width:260px;border-color:var(--brand);box-shadow:0 0 0 4px rgba(13,110,98,.12)}
.command-search svg{flex:none;color:var(--muted)}
.command-search input{flex:1;min-width:0;border:0;background:transparent;font-size:13px;outline:none}
.command-search input::placeholder{color:var(--muted)}
.keycap{
  display:grid;place-items:center;height:20px;padding:0 6px;border:1px solid var(--line);
  border-radius:6px;font-size:11px;color:var(--muted);font-variant-numeric:tabular-nums;flex:none;
}
.quick-link{font-size:14px;font-weight:500;color:var(--text);transition:color .18s var(--ease)}
.quick-link:hover{color:var(--brand);text-decoration:underline;text-underline-offset:4px}
.nav-toggle{
  display:none;place-items:center;width:44px;height:44px;border-radius:var(--radius-s);
  color:var(--ink);
}
.nav-toggle span{display:block;position:relative;width:20px;height:2px;background:currentColor;border-radius:2px;transition:background .18s var(--ease)}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:20px;height:2px;background:currentColor;border-radius:2px;
  transition:transform .2s var(--ease);
}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}
.nav-toggle[aria-expanded="true"] span{background:transparent}
.nav-toggle[aria-expanded="true"] span::before{transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span::after{transform:translateY(-6px) rotate(-45deg)}
.mobile-drawer{display:none;border-top:1px solid var(--line);background:var(--surface);padding:8px 0 20px}
.mobile-drawer.is-open{display:block;animation:drawerIn .2s var(--ease) both}
@keyframes drawerIn{from{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:translateY(0)}}
.drawer-nav a{
  display:flex;align-items:center;justify-content:space-between;height:52px;
  font-size:15px;font-weight:500;color:var(--text);border-bottom:1px solid var(--line);
}
.drawer-nav a.is-active{color:var(--brand);font-weight:600}
.drawer-nav a svg{color:var(--muted)}
.drawer-search{display:flex;align-items:center;gap:8px;height:44px;margin:16px 0 12px;padding:0 14px;border:1px solid var(--line);border-radius:var(--radius-pill);background:var(--bg)}
.drawer-search input{flex:1;min-width:0;border:0;background:transparent;font-size:14px;outline:none}
.drawer-cta{display:block;width:100%;text-align:center}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 28px;border:1.5px solid transparent;border-radius:var(--radius-pill);
  font-size:15px;font-weight:600;white-space:nowrap;cursor:pointer;
  transition:background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease),box-shadow .18s var(--ease);
}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:var(--brand-strong);transform:translateY(-1px);box-shadow:var(--shadow-1)}
.btn-accent{background:var(--accent);color:#fff}
.btn-accent:hover{background:#d95f2c;transform:translateY(-1px);box-shadow:var(--shadow-1)}
.btn-ghost{border-color:var(--line);color:var(--ink);background:transparent}
.btn-ghost:hover{background:var(--brand-soft);border-color:var(--brand)}
.btn-light{border-color:rgba(255,255,255,.55);color:#fff;background:transparent}
.btn-light:hover{background:rgba(255,255,255,.12);border-color:#fff}
.btn-sm{height:36px;padding:0 18px;font-size:14px}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--brand)}
.link-arrow svg{transition:transform .18s var(--ease)}
.link-arrow:hover{text-decoration:underline;text-underline-offset:4px}
.link-arrow:hover svg{transform:translateX(3px)}

/* ---------- hero ---------- */
.page-hero{position:relative;isolation:isolate;overflow:hidden;padding:88px 0 116px;color:#fff;background:var(--brand-strong)}
.page-hero::before{
  content:"";position:absolute;inset:0;z-index:-2;
  background-image:url("/assets/images/backpic/back-1.webp");
  background-size:cover;background-position:center;
}
.page-hero::after{
  content:"";position:absolute;inset:0;z-index:-1;
  background:linear-gradient(100deg,rgba(9,80,72,.94) 0%,rgba(9,80,72,.78) 48%,rgba(9,80,72,.55) 100%);
}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:rgba(255,255,255,.72);margin-bottom:26px}
.breadcrumb a{color:rgba(255,255,255,.72);transition:color .18s var(--ease)}
.breadcrumb a:hover{color:#fff;text-decoration:underline;text-underline-offset:4px}
.breadcrumb .sep{color:rgba(255,255,255,.42)}
.breadcrumb .current{color:#fff}
.hero-inner{max-width:760px}
.hero-eyebrow{
  display:inline-block;padding:5px 12px;border-radius:var(--radius-pill);
  background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.22);
  font-size:12px;font-weight:600;letter-spacing:.04em;color:#fff;margin-bottom:20px;
}
.page-hero h1{
  font-size:clamp(30px,4.2vw,50px);line-height:1.16;font-weight:700;letter-spacing:-.02em;color:#fff;
}
.page-hero h1 .accent-line{display:block;color:#fff}
.hero-sub{margin-top:20px;font-size:17px;line-height:1.8;color:rgba(255,255,255,.86);max-width:34em}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:32px}

/* ---------- fact bar ---------- */
.fact-bar{position:relative;z-index:3;margin-top:-56px}
.fact-grid{
  display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);
  border:1px solid var(--line);border-radius:var(--radius-m);overflow:hidden;box-shadow:var(--shadow-1);
}
.fact{background:var(--surface);padding:20px 24px}
.fact-label{display:block;font-size:13px;color:var(--muted);margin-bottom:6px}
.fact-value{display:block;font-size:16px;font-weight:600;color:var(--ink);font-variant-numeric:tabular-nums;line-height:1.5}

/* ---------- sections ---------- */
.section{padding:96px 0}
.section-tight{padding:72px 0}
.section-surface{background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{max-width:720px;margin-bottom:48px}
.section-head .eyebrow{display:inline-block;font-size:12px;font-weight:600;letter-spacing:.06em;color:var(--brand);margin-bottom:14px}
.section-head h2{font-size:clamp(24px,3.2vw,38px);line-height:1.2;font-weight:700;letter-spacing:-.015em;color:var(--ink)}
.section-head p{margin-top:16px;font-size:16px;line-height:1.8;color:var(--text)}

/* ---------- steps ---------- */
.steps{position:relative;display:grid;grid-template-columns:repeat(3,1fr);gap:48px}
.steps::before{content:"";position:absolute;top:22px;left:6%;right:6%;height:1px;background:var(--line)}
.step{position:relative;padding-top:72px}
.step-num{
  position:absolute;top:0;left:0;z-index:1;background:var(--bg);padding-right:20px;
  font-size:clamp(34px,3.6vw,48px);font-weight:800;line-height:1;color:var(--brand);
  font-variant-numeric:tabular-nums;letter-spacing:-.03em;
}
.step h3{font-size:20px;font-weight:600;color:var(--ink);margin-bottom:10px}
.step p{font-size:15px;line-height:1.75;color:var(--text)}
.step-tip{
  display:flex;align-items:flex-start;gap:8px;margin-top:16px;padding:12px 14px;
  background:var(--brand-soft);border-radius:var(--radius-s);font-size:13px;line-height:1.7;color:var(--brand-strong);
}
.step-tip svg{flex:none;margin-top:3px}

/* ---------- point list ---------- */
.point-list{border-top:1px solid var(--line)}
.point{
  position:relative;display:grid;grid-template-columns:88px 1fr;gap:28px;align-items:start;
  padding:28px 0;border-bottom:1px solid var(--line);transition:padding-left .18s var(--ease);
}
.point::before{
  content:"";position:absolute;left:-18px;top:30px;bottom:30px;width:3px;border-radius:3px;
  background:var(--brand);opacity:0;transition:opacity .18s var(--ease);
}
.point:hover::before{opacity:1}
.point:hover{padding-left:8px}
.point-num{font-size:clamp(28px,3.2vw,40px);font-weight:800;line-height:1;color:var(--brand);font-variant-numeric:tabular-nums;letter-spacing:-.03em}
.point h3{font-size:20px;font-weight:600;color:var(--ink);margin-bottom:8px}
.point p{font-size:15px;line-height:1.75;color:var(--text);max-width:44em}

/* ---------- split ---------- */
.split{display:grid;grid-template-columns:1.05fr 1fr;gap:56px;align-items:center}
.split-media{position:relative}
.split-media img{
  width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--radius-l);
  border:1px solid var(--line);box-shadow:var(--shadow-2);
}
.split-copy h2{font-size:clamp(24px,3vw,34px);line-height:1.24;font-weight:700;letter-spacing:-.015em;color:var(--ink)}
.split-copy > p{margin-top:16px;font-size:16px;line-height:1.8;color:var(--text);max-width:36em}
.checklist{margin-top:28px;display:grid;gap:0;border-top:1px solid var(--line)}
.checklist li{display:flex;align-items:flex-start;gap:12px;padding:16px 0;border-bottom:1px solid var(--line);font-size:15px;line-height:1.75;color:var(--text)}
.checklist li svg{flex:none;margin-top:4px;color:var(--brand)}
.checklist li strong{color:var(--ink);font-weight:600}

/* ---------- faq ---------- */
.faq-list{border-top:1px solid var(--line);max-width:900px}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item summary{
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:22px 0;font-size:16px;font-weight:600;color:var(--ink);cursor:pointer;list-style:none;
  transition:color .18s var(--ease);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:"";flex:none;width:14px;height:14px;position:relative;
  background:
    linear-gradient(var(--brand),var(--brand)) center/14px 1.6px no-repeat,
    linear-gradient(var(--brand),var(--brand)) center/1.6px 14px no-repeat;
  transition:transform .18s var(--ease);
}
.faq-item[open] summary{color:var(--brand)}
.faq-item[open] summary::after{transform:rotate(45deg)}
.faq-item summary:hover{color:var(--brand)}
.faq-body{padding:0 0 24px;font-size:15px;line-height:1.85;color:var(--text);max-width:76ch}

/* ---------- cta ---------- */
.cta-band{
  display:grid;grid-template-columns:1fr 200px;gap:48px;align-items:center;
  background:var(--brand-strong);color:#fff;border-radius:var(--radius-l);padding:56px;
}
.cta-copy h2{font-size:clamp(22px,2.6vw,32px);line-height:1.24;font-weight:700;letter-spacing:-.015em;color:#fff}
.cta-copy > p{margin-top:14px;font-size:15px;line-height:1.8;color:rgba(255,255,255,.82);max-width:34em}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.cta-meta{
  display:flex;flex-wrap:wrap;gap:8px 20px;margin-top:28px;padding-top:20px;
  border-top:1px solid rgba(255,255,255,.16);
  font-size:13px;color:rgba(255,255,255,.72);font-variant-numeric:tabular-nums;
}
.qr-box{
  display:grid;gap:12px;justify-items:center;
}
.qr-code{
  width:112px;height:112px;border-radius:12px;background:#fff;display:grid;place-items:center;color:var(--brand-strong);
}
.qr-box span{font-size:12px;color:rgba(255,255,255,.72);text-align:center}

/* ---------- footer ---------- */
.site-footer{background:var(--ink);color:rgba(255,255,255,.68);padding:72px 0 0;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:48px}
.footer-brand .brand{color:#fff}
.footer-brand .brand-mark{background:var(--brand)}
.footer-brand p{margin-top:18px;font-size:14px;line-height:1.8;max-width:26em;color:rgba(255,255,255,.62)}
.footer-contact{margin-top:16px;font-size:13px;color:rgba(255,255,255,.54)}
.footer-col h4{font-size:14px;font-weight:600;color:#fff;margin-bottom:18px}
.footer-links{display:grid;gap:12px}
.footer-links a{font-size:14px;color:rgba(255,255,255,.66);transition:color .18s var(--ease)}
.footer-links a:hover{color:#fff;text-decoration:underline;text-underline-offset:4px}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:8px 24px;justify-content:space-between;
  margin-top:56px;padding:24px 0 28px;border-top:1px solid rgba(255,255,255,.10);
  font-size:13px;color:rgba(255,255,255,.5);
}

/* ---------- responsive ---------- */
@media (max-width:1180px){
  .main-nav{gap:20px}
  .nav-link{font-size:13.5px}
  .command-search{width:170px}
  .command-search:focus-within{width:210px}
}
@media (max-width:1024px){
  .main-nav{display:none}
  .command-search{display:none}
  .quick-link{display:none}
  .nav-toggle{display:grid}
  .section{padding:80px 0}
  .split{grid-template-columns:1fr;gap:36px}
  .split-media{order:2}
  .cta-band{grid-template-columns:1fr;gap:36px;padding:44px}
  .qr-box{justify-items:start}
  .footer-grid{grid-template-columns:1fr 1fr;gap:40px}
  .fact-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:768px){
  .header-inner{height:56px}
  .brand{font-size:16px}
  .section{padding:64px 0}
  .section-tight{padding:56px 0}
  .page-hero{padding:56px 0 96px}
  .page-hero h1{font-size:clamp(28px,7vw,36px)}
  .hero-sub{font-size:16px}
  .hero-actions .btn{width:100%}
  .fact-bar{margin-top:-44px}
  .fact-grid{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr;gap:0}
  .steps::before{top:16px;bottom:32px;left:23px;right:auto;width:1px;height:auto}
  .step{padding:32px 0 8px 64px}
  .step-num{font-size:32px;background:transparent;padding-right:0}
  .step:first-child{padding-top:0}
  .step:first-child .step-num{top:-4px}
  .point{grid-template-columns:56px 1fr;gap:16px;padding:24px 0}
  .point::before{left:-12px}
  .point-num{font-size:28px}
  .cta-band{padding:32px 24px}
  .cta-actions .btn{width:100%}
  .footer-grid{grid-template-columns:1fr;gap:36px}
  .site-footer{padding:48px 0 0}
  .footer-bottom{margin-top:40px}
}
@media (max-width:520px){
  .header-tools .btn-sm{display:none}
  .brand-text{font-size:15px}
  .section-head{margin-bottom:32px}
  .faq-item summary{font-size:15px;padding:18px 0}
}
@media (min-width:1025px){
  .mobile-drawer{display:none !important}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;transition-duration:.001ms !important}
}

/* roulang page: category2 */
:root{
  --brand:#0D6E62;
  --brand-strong:#095048;
  --brand-soft:#E7F1EE;
  --accent:#F1713B;
  --ink:#0B0F0E;
  --text:#3B4442;
  --muted:#8A928F;
  --bg:#F6F7F5;
  --surface:#FFFFFF;
  --line:#E3E7E4;
  --radius-s:8px;
  --radius-m:14px;
  --radius-l:22px;
  --radius-pill:999px;
  --shadow-1:0 1px 2px rgba(11,15,14,.04),0 8px 24px rgba(11,15,14,.05);
  --shadow-2:0 18px 48px rgba(11,15,14,.10);
  --maxw:1200px;
  --gutter:clamp(20px,4vw,48px);
  --ease:cubic-bezier(.2,.7,.3,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
body.is-locked{overflow:hidden}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
input{font:inherit}
h1,h2,h3,h4{margin:0;color:var(--ink);font-weight:700;letter-spacing:-.015em;line-height:1.25}
h1{font-size:clamp(30px,4vw,46px);line-height:1.16;letter-spacing:-.02em}
h2{font-size:clamp(24px,3.2vw,34px);line-height:1.22}
h3{font-size:clamp(18px,1.6vw,21px);font-weight:600;line-height:1.4}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
strong{color:var(--ink)}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 var(--gutter)}

/* ---------- 顶栏 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(255,255,255,.92);
  -webkit-backdrop-filter:blur(8px);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .18s var(--ease),background-color .18s var(--ease);
}
.site-header.is-scrolled{box-shadow:var(--shadow-1);background:rgba(255,255,255,.97)}
.header-inner{
  position:relative;
  display:flex;align-items:center;gap:26px;
  height:64px;max-width:var(--maxw);margin:0 auto;padding:0 var(--gutter);
}
.brand{display:inline-flex;align-items:center;gap:10px;font-size:17px;font-weight:700;letter-spacing:-.01em;color:var(--ink);white-space:nowrap}
.brand-mark{
  width:32px;height:32px;flex:0 0 auto;border-radius:9px;
  background:var(--brand);color:#fff;display:grid;place-items:center;
}
.brand-text{color:var(--ink)}
.main-nav{display:flex;align-items:center;gap:22px;margin-left:6px}
.nav-link{position:relative;font-size:14px;font-weight:500;color:var(--text);padding:6px 0;white-space:nowrap;transition:color .18s var(--ease)}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:-1px;height:1px;background:var(--ink);
  transform:scaleX(0);transform-origin:left;transition:transform .18s var(--ease);
}
.nav-link:hover{color:var(--ink)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.is-active{color:var(--ink)}
.nav-link.is-active::after{
  left:50%;right:auto;width:20px;height:2px;border-radius:2px;background:var(--brand);
  transform:translateX(-50%) scaleX(1);transform-origin:center;
}
.header-actions{display:flex;align-items:center;gap:14px;margin-left:auto}
.search-box{
  display:flex;align-items:center;gap:8px;
  height:36px;width:200px;padding:0 10px 0 12px;
  border:1px solid var(--line);border-radius:var(--radius-pill);
  background:var(--surface);color:var(--muted);
  transition:width .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.search-box:focus-within{width:260px;border-color:var(--brand);box-shadow:0 0 0 4px rgba(13,110,98,.12)}
.search-box svg{flex:0 0 auto}
.search-box input{flex:1 1 auto;min-width:0;border:0;outline:none;background:transparent;font-size:13px;color:var(--ink)}
.search-box input::placeholder{color:var(--muted)}
.search-box kbd{
  flex:0 0 auto;font-family:inherit;font-size:11px;line-height:1.5;color:var(--muted);
  border:1px solid var(--line);border-radius:6px;padding:0 6px;background:var(--bg);
}
.link-quiet{font-size:14px;font-weight:500;color:var(--text);transition:color .18s var(--ease)}
.link-quiet:hover{color:var(--brand)}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 28px;border-radius:var(--radius-pill);
  font-size:15px;font-weight:600;white-space:nowrap;
  border:1.5px solid transparent;
  transition:background-color .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease);
}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:var(--brand-strong);transform:translateY(-1px);box-shadow:var(--shadow-1)}
.btn-primary:active{transform:translateY(0)}
.btn-outline{border-color:var(--line);color:var(--ink);background:transparent}
.btn-outline:hover{background:var(--brand-soft);border-color:var(--brand);color:var(--brand)}
.btn-accent{background:var(--accent);color:#fff}
.btn-accent:hover{transform:translateY(-1px);box-shadow:var(--shadow-1);filter:brightness(.96)}
.btn-ghost-light{border-color:rgba(255,255,255,.5);color:#fff;background:transparent}
.btn-ghost-light:hover{background:rgba(255,255,255,.12);border-color:#fff}
.btn-sm{height:36px;padding:0 18px;font-size:14px}
.btn-block{width:100%}

.nav-toggle{
  display:none;width:44px;height:44px;border-radius:12px;
  align-items:center;justify-content:center;
}
.nav-toggle:hover{background:var(--brand-soft)}
.bars{position:relative;display:block;width:20px;height:14px}
.bars i{position:absolute;left:0;right:0;height:1.5px;border-radius:2px;background:var(--ink);transition:transform .2s var(--ease),opacity .2s var(--ease),top .2s var(--ease)}
.bars i:nth-child(1){top:0}
.bars i:nth-child(2){top:6.5px}
.bars i:nth-child(3){top:13px}
.nav-toggle[aria-expanded="true"] .bars i:nth-child(1){top:6.5px;transform:rotate(45deg)}
.nav-toggle[aria-expanded="true"] .bars i:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .bars i:nth-child(3){top:6.5px;transform:rotate(-45deg)}

.mobile-drawer{
  display:none;
  position:absolute;left:0;right:0;top:100%;
  background:var(--surface);
  border-bottom:1px solid var(--line);
  box-shadow:var(--shadow-1);
  padding:6px var(--gutter) 22px;
  transform:translateY(-8px);opacity:0;
  transition:transform .2s var(--ease),opacity .2s var(--ease);
}
.mobile-drawer.is-open{display:block;transform:translateY(0);opacity:1}
.drawer-link{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  height:52px;border-bottom:1px solid var(--line);
  font-size:15px;font-weight:500;color:var(--text);
}
.drawer-link.is-active{color:var(--brand);font-weight:600}
.drawer-link svg{color:var(--muted)}
.drawer-search{
  display:flex;align-items:center;gap:8px;height:44px;margin-top:16px;padding:0 14px;
  border:1px solid var(--line);border-radius:var(--radius-pill);background:var(--bg);color:var(--muted);
}
.drawer-search input{flex:1;min-width:0;border:0;outline:none;background:transparent;font-size:14px;color:var(--ink)}
.drawer-cta{margin-top:16px}

/* ---------- 页头 ---------- */
.page-hero{background:var(--surface);border-bottom:1px solid var(--line)}
.page-hero-grid{
  display:grid;grid-template-columns:1.1fr .9fr;gap:clamp(28px,4vw,56px);
  align-items:center;padding:clamp(36px,5vw,64px) 0 clamp(32px,4vw,52px);
}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--muted);margin-bottom:18px}
.breadcrumb a{transition:color .18s var(--ease)}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb em{font-style:normal;color:var(--ink);font-weight:600}
.page-hero h1{margin-bottom:16px;max-width:20em}
.page-hero .lede{font-size:17px;line-height:1.85;color:var(--text);max-width:34em}
.meta-row{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px 14px;
  margin-top:24px;font-size:13px;color:var(--muted);
}
.meta-row span{display:inline-flex;align-items:center;gap:6px}
.meta-row span+span::before{content:"";width:1px;height:12px;background:var(--line);margin-right:14px}
.meta-row b{color:var(--ink);font-weight:600;font-variant-numeric:tabular-nums}
.hero-figure{
  border-radius:var(--radius-l);overflow:hidden;border:1px solid var(--line);
  box-shadow:var(--shadow-2);aspect-ratio:16/11;background:var(--brand-soft);
}
.hero-figure img{width:100%;height:100%;object-fit:cover}

/* ---------- 锚点条 ---------- */
.chip-bar{background:var(--surface);border-bottom:1px solid var(--line)}
.chip-scroll{display:flex;gap:10px;overflow-x:auto;padding:14px 0;scrollbar-width:thin}
.chip-scroll::-webkit-scrollbar{height:6px}
.chip-scroll::-webkit-scrollbar-thumb{background:var(--line);border-radius:3px}
.chip{
  display:inline-flex;align-items:center;gap:8px;height:34px;padding:0 15px;
  border:1px solid var(--line);border-radius:var(--radius-pill);
  background:var(--surface);font-size:13px;font-weight:600;color:var(--text);white-space:nowrap;
  transition:background-color .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.chip:hover{border-color:var(--brand);color:var(--brand);background:var(--brand-soft)}
.chip.is-active{background:var(--brand);border-color:var(--brand);color:#fff}
.chip i{width:6px;height:6px;border-radius:50%;background:currentColor;opacity:.6;font-style:normal}

/* ---------- 通用区块 ---------- */
.section{padding:clamp(56px,7vw,96px) 0}
.section-head{max-width:44em;margin-bottom:clamp(28px,4vw,48px)}
.section-head h2{margin-bottom:14px}
.section-head p{font-size:16px;line-height:1.85;color:var(--text)}
.section-head .kicker{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;font-weight:600;letter-spacing:.06em;color:var(--brand);
  text-transform:none;margin-bottom:14px;
}
.section-head .kicker::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--brand)}

/* ---------- 时间线 ---------- */
.timeline-wrap{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-l);padding:clamp(24px,3.5vw,44px)}
.timeline{position:relative;padding-left:28px}
.timeline::before{content:"";position:absolute;left:5px;top:10px;bottom:10px;width:1px;background:var(--line)}
.version-item{position:relative;padding-bottom:24px}
.version-item:last-child{padding-bottom:0}
.version-item::before{
  content:"";position:absolute;left:-28px;top:26px;width:11px;height:11px;border-radius:50%;
  background:var(--surface);border:2px solid var(--line);
  transition:transform .2s var(--ease),background-color .2s var(--ease),border-color .2s var(--ease);
}
.version-item.is-current::before{background:var(--brand);border-color:var(--brand)}
.version-item:hover::before{transform:scale(1.15);border-color:var(--brand)}
.version-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-m);
  padding:24px;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease);
}
.version-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-1);border-color:#D6DCD8}
.version-head{display:flex;align-items:baseline;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-bottom:8px}
.version-no{
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-size:18px;font-weight:600;color:var(--ink);font-variant-numeric:tabular-nums;letter-spacing:.01em;
}
.version-date{font-size:13px;color:var(--muted);font-variant-numeric:tabular-nums}
.version-tags{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:16px}
.tag{
  display:inline-flex;align-items:center;height:22px;padding:0 10px;border-radius:var(--radius-pill);
  font-size:12px;font-weight:600;letter-spacing:.02em;
  background:var(--brand-soft);color:var(--brand);
}
.tag-neutral{background:var(--bg);color:var(--muted)}
.version-list{display:grid;gap:10px;border-top:1px solid var(--line);padding-top:16px}
.version-list li{position:relative;padding-left:16px;font-size:15px;line-height:1.75;color:var(--text)}
.version-list li::before{content:"";position:absolute;left:0;top:.72em;width:5px;height:5px;border-radius:50%;background:var(--brand)}
.version-summary{margin:0 0 16px;font-size:15px;line-height:1.8;color:var(--text)}

/* ---------- 编号行列表 ---------- */
.numbered{border-top:1px solid var(--line)}
.numbered-row{
  display:grid;grid-template-columns:88px 1fr;gap:clamp(16px,3vw,36px);
  padding:28px 0;border-bottom:1px solid var(--line);
  transition:background-color .2s var(--ease),padding-left .2s var(--ease);
}
.numbered-row:hover{background:rgba(231,241,238,.5);padding-left:6px}
.numbered-row .num{
  font-size:clamp(30px,3.4vw,42px);font-weight:800;line-height:1;
  color:var(--brand);font-variant-numeric:tabular-nums;letter-spacing:-.02em;
}
.numbered-row h3{margin-bottom:10px}
.numbered-row p{font-size:15px;line-height:1.8;color:var(--text);max-width:46em}

/* ---------- 规格网格 ---------- */
.spec-grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:1px;
  background:var(--line);border:1px solid var(--line);border-radius:var(--radius-m);overflow:hidden;
}
.spec-cell{background:var(--surface);padding:20px 24px}
.spec-cell .label{font-size:13px;color:var(--muted);margin-bottom:6px}
.spec-cell .value{font-size:16px;font-weight:600;color:var(--ink);line-height:1.6}
.spec-cell .value small{display:block;font-size:13px;font-weight:400;color:var(--muted);margin-top:4px}
.spec-note{margin-top:16px;font-size:13px;color:var(--muted)}

/* ---------- FAQ ---------- */
.faq{border-top:1px solid var(--line)}
.faq details{border-bottom:1px solid var(--line)}
.faq summary{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:22px 0;font-size:16px;font-weight:600;color:var(--ink);
  cursor:pointer;list-style:none;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary:hover{color:var(--brand)}
.faq summary svg{flex:0 0 auto;color:var(--muted);transition:transform .18s var(--ease),color .18s var(--ease)}
.faq details[open] summary{color:var(--brand)}
.faq details[open] summary svg{transform:rotate(45deg);color:var(--brand)}
.faq .faq-body{padding:0 0 22px;font-size:15px;line-height:1.85;color:var(--text);max-width:56em}

/* ---------- CTA ---------- */
.cta-panel{
  background:var(--brand-strong);color:#fff;border-radius:var(--radius-l);
  padding:clamp(30px,5vw,56px);
  display:grid;grid-template-columns:1.4fr .9fr;gap:clamp(24px,4vw,48px);align-items:center;
}
.cta-panel h2{color:#fff;margin-bottom:14px}
.cta-panel .cta-desc{font-size:15px;line-height:1.8;color:rgba(255,255,255,.82);max-width:36em}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
.cta-side{display:flex;flex-direction:column;align-items:center;gap:12px;justify-self:end}
.qr-box{
  width:96px;height:96px;border-radius:12px;background:#fff;
  display:grid;place-items:center;color:var(--brand-strong);
}
.qr-caption{font-size:12px;color:rgba(255,255,255,.72);text-align:center}
.check-line{
  grid-column:1 / -1;display:flex;flex-wrap:wrap;gap:10px 18px;
  margin-top:8px;padding-top:20px;border-top:1px solid rgba(255,255,255,.14);
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-size:13px;color:rgba(255,255,255,.72);font-variant-numeric:tabular-nums;
}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink);color:rgba(255,255,255,.72);margin-top:clamp(56px,7vw,96px)}
.footer-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:clamp(24px,4vw,48px);
  padding:72px 0 48px;
}
.footer-brand .brand{color:#fff;margin-bottom:16px}
.footer-brand .brand-text{color:#fff}
.footer-brand .brand-mark{background:rgba(255,255,255,.14)}
.footer-brand p{font-size:14px;line-height:1.8;max-width:24em}
.footer-contact{margin-top:16px;font-size:13px;color:rgba(255,255,255,.58)}
.footer-col h4{color:#fff;font-size:14px;font-weight:600;margin-bottom:16px;letter-spacing:.02em}
.footer-links{display:grid;gap:10px}
.footer-links a{font-size:14px;color:rgba(255,255,255,.72);transition:color .18s var(--ease)}
.footer-links a:hover{color:#fff;text-decoration:underline;text-underline-offset:4px}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;
  padding:22px 0 32px;border-top:1px solid rgba(255,255,255,.1);
  font-size:13px;color:rgba(255,255,255,.58);
}

/* ---------- 响应式 ---------- */
@media (max-width:1023px){
  .page-hero-grid{grid-template-columns:1fr;gap:32px}
  .hero-figure{aspect-ratio:16/9}
  .spec-grid{grid-template-columns:repeat(2,1fr)}
  .cta-panel{grid-template-columns:1fr}
  .cta-side{justify-self:start;flex-direction:row;align-items:center;gap:16px}
}
@media (max-width:768px){
  .header-inner{height:56px;gap:12px}
  .main-nav{display:none}
  .header-actions .search-box,
  .header-actions .link-quiet,
  .header-actions .btn{display:none}
  .nav-toggle{display:inline-flex}
  .mobile-drawer{max-height:calc(100vh - 56px);overflow-y:auto}
  .numbered-row{grid-template-columns:64px 1fr;gap:16px;padding:24px 0}
  .search-box:focus-within{width:100%}
  .cta-actions .btn{width:100%}
  .footer-grid{grid-template-columns:1fr;padding:48px 0 32px;gap:32px}
  .footer-bottom{padding-bottom:28px}
}
@media (max-width:520px){
  .spec-grid{grid-template-columns:1fr}
  .breadcrumb{font-size:12px}
  .version-head{gap:8px}
  .version-no{font-size:17px}
  .timeline{padding-left:22px}
  .version-item::before{left:-22px}
  .timeline::before{left:5px}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;scroll-behavior:auto !important}
}

/* roulang page: category3 */
:root{
  --brand:#0D6E62;
  --brand-strong:#095048;
  --brand-soft:#E7F1EE;
  --accent:#F1713B;
  --ink:#0B0F0E;
  --text:#3B4442;
  --muted:#8A928F;
  --bg:#F6F7F5;
  --surface:#FFFFFF;
  --line:#E3E7E4;
  --warn:#C0392B;
  --radius-s:8px;
  --radius-m:14px;
  --radius-l:22px;
  --radius-pill:999px;
  --shadow-1:0 1px 2px rgba(11,15,14,.04),0 8px 24px rgba(11,15,14,.05);
  --shadow-2:0 18px 48px rgba(11,15,14,.10);
  --maxw:1200px;
  --gutter:clamp(20px,4vw,48px);
  --ease:cubic-bezier(.2,.7,.3,1);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto;}
a{color:var(--brand);text-decoration:none;transition:color .18s var(--ease);}
a:hover{color:var(--brand-strong);}
button{font:inherit;color:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;color:var(--ink);font-weight:700;letter-spacing:-.015em;}
p{margin:0;}
svg{display:block;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px;}

.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 var(--gutter);}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(255,255,255,.92);
  border-bottom:1px solid var(--line);
  transition:box-shadow .18s var(--ease),background .18s var(--ease);
  backdrop-filter:blur(8px);
}
.site-header.is-scrolled{box-shadow:var(--shadow-1);background:rgba(255,255,255,.97);}
.header-inner{display:flex;align-items:center;gap:24px;min-height:64px;}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.brand-mark{
  width:34px;height:34px;border-radius:10px;
  display:flex;align-items:center;justify-content:center;
  background:var(--brand);color:#fff;flex-shrink:0;
  box-shadow:var(--shadow-1);
}
.brand-text{font-size:17px;font-weight:700;letter-spacing:-.01em;color:var(--ink);white-space:nowrap;}
.brand:hover .brand-text{color:var(--brand);}
.main-nav{display:flex;align-items:center;gap:4px;margin-left:8px;}
.nav-link{
  position:relative;display:inline-block;
  padding:8px 12px;font-size:14px;font-weight:500;color:var(--text);
  border-radius:var(--radius-s);white-space:nowrap;
}
.nav-link::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:1px;
  background:var(--ink);transform:scaleX(0);transform-origin:center;
  transition:transform .16s var(--ease);
}
.nav-link:hover{color:var(--ink);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.is-active{color:var(--ink);font-weight:600;}
.nav-link.is-active::after{
  transform:scaleX(1);height:2px;background:var(--brand);
  left:50%;right:auto;width:20px;margin-left:-10px;bottom:0;
}
.header-right{display:flex;align-items:center;gap:14px;margin-left:auto;}
.cmd-search{
  display:flex;align-items:center;gap:8px;
  height:36px;width:200px;padding:0 10px 0 12px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-pill);
  transition:width .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.cmd-search:focus-within{
  width:260px;border-color:var(--brand);
  box-shadow:0 0 0 4px rgba(13,110,98,.12);
}
.cmd-search svg{color:var(--muted);flex-shrink:0;}
.cmd-search input{
  flex:1;min-width:0;border:0;background:transparent;font-size:13px;color:var(--ink);
  outline:none;padding:0;
}
.cmd-search input::placeholder{color:var(--muted);}
.keycap{
  font-size:11px;line-height:1;color:var(--muted);
  border:1px solid var(--line);border-radius:6px;padding:4px 5px;
  flex-shrink:0;
}
.quick-link{font-size:14px;font-weight:500;color:var(--text);white-space:nowrap;}
.quick-link:hover{color:var(--brand);text-decoration:underline;text-underline-offset:4px;}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border:0;cursor:pointer;font-weight:600;font-size:15px;
  border-radius:var(--radius-pill);padding:0 24px;height:48px;
  transition:transform .18s var(--ease),box-shadow .18s var(--ease),background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.btn:active{transform:translateY(1px);}
.btn-sm{height:36px;font-size:14px;padding:0 16px;}
.btn-primary{background:var(--brand);color:#fff;}
.btn-primary:hover{background:var(--brand-strong);color:#fff;transform:translateY(-1px);box-shadow:var(--shadow-1);}
.btn-accent{background:var(--accent);color:#fff;}
.btn-accent:hover{background:#D9602D;color:#fff;transform:translateY(-1px);box-shadow:var(--shadow-1);}
.btn-ghost{background:transparent;color:var(--ink);border:1.5px solid var(--line);}
.btn-ghost:hover{background:var(--brand-soft);border-color:var(--brand);color:var(--brand-strong);}
.btn-ghost-light{background:transparent;color:#fff;border:1.5px solid rgba(255,255,255,.55);}
.btn-ghost-light:hover{background:rgba(255,255,255,.12);color:#fff;border-color:#fff;}
.btn-block{width:100%;}
.nav-toggle{
  display:none;width:44px;height:44px;align-items:center;justify-content:center;
  background:transparent;border:1px solid var(--line);border-radius:var(--radius-s);cursor:pointer;
}
.nav-toggle span{display:block;width:18px;height:1.6px;background:var(--ink);margin:3.5px 0;transition:transform .2s var(--ease),opacity .2s var(--ease);}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(5px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0;}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-5px) rotate(-45deg);}
.mobile-drawer{
  display:none;border-top:1px solid var(--line);background:var(--surface);
  padding:12px var(--gutter) 20px;
}
.mobile-drawer.is-open{display:block;animation:drawerIn .2s var(--ease);}
@keyframes drawerIn{from{opacity:0;transform:translateY(-8px);}to{opacity:1;transform:translateY(0);}}
.drawer-nav a{
  display:flex;align-items:center;justify-content:space-between;
  min-height:52px;padding:0 4px;font-size:15px;color:var(--text);
  border-bottom:1px solid var(--line);
}
.drawer-nav a.is-active{color:var(--brand);font-weight:600;}
.drawer-search{display:flex;align-items:center;gap:8px;margin:16px 0 12px;height:44px;padding:0 14px;border:1px solid var(--line);border-radius:var(--radius-pill);background:var(--bg);}
.drawer-search input{flex:1;border:0;background:transparent;outline:none;font-size:14px;color:var(--ink);}

/* ---------- page hero ---------- */
.page-hero{
  position:relative;color:#fff;padding:72px 0 64px;
  background:
    linear-gradient(135deg,rgba(11,15,14,.86),rgba(9,80,72,.74)),
    url("/assets/images/backpic/back-1.webp") center/cover no-repeat;
}
.page-hero .breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:rgba(255,255,255,.72);margin-bottom:22px;}
.page-hero .breadcrumb a{color:rgba(255,255,255,.82);}
.page-hero .breadcrumb a:hover{color:#fff;text-decoration:underline;text-underline-offset:4px;}
.page-hero .breadcrumb .sep{opacity:.6;}
.page-hero h1{
  color:#fff;font-size:clamp(28px,4vw,48px);line-height:1.16;letter-spacing:-.02em;
  max-width:26em;
}
.hero-sub{
  margin-top:18px;font-size:17px;line-height:1.85;color:rgba(255,255,255,.84);
  max-width:36em;
}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px;}
.hero-tags li{
  font-size:12px;font-weight:600;letter-spacing:.04em;
  padding:7px 13px;border-radius:var(--radius-pill);
  background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.24);color:#fff;
}
.hero-strip{
  display:flex;flex-wrap:wrap;gap:12px 32px;margin-top:32px;
  padding-top:22px;border-top:1px solid rgba(255,255,255,.18);
  font-size:13px;color:rgba(255,255,255,.78);
}
.hero-strip b{color:#fff;font-weight:600;font-variant-numeric:tabular-nums;}

/* ---------- sections ---------- */
.section{padding:96px 0;}
.section-alt{background:var(--surface);}
.section-head{max-width:44em;margin-bottom:44px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;font-weight:600;letter-spacing:.08em;color:var(--brand);
  background:var(--brand-soft);border-radius:var(--radius-pill);padding:6px 12px;margin-bottom:16px;
}
.section-head h2{font-size:clamp(24px,3.2vw,36px);line-height:1.22;}
.section-head p{margin-top:14px;font-size:16px;color:var(--text);}

/* ---------- compare ---------- */
.compare{display:grid;grid-template-columns:1fr 1fr;gap:24px;align-items:start;}
.compare-card{
  background:var(--surface);border-radius:var(--radius-m);padding:30px 28px;
  border:1px solid var(--line);
}
.compare-card.is-good{border:1.5px solid var(--brand);background:var(--brand-soft);}
.compare-card.is-risk{border:1px solid var(--line);background:var(--surface);}
.compare-head{display:flex;align-items:center;gap:12px;margin-bottom:22px;}
.compare-head h3{font-size:20px;}
.badge-icon{
  width:34px;height:34px;border-radius:50%;display:flex;align-items:center;justify-content:center;flex-shrink:0;
}
.is-good .badge-icon{background:var(--brand);color:#fff;}
.is-risk .badge-icon{background:var(--surface);color:var(--muted);border:1.5px solid var(--line);}
.compare-list li{
  display:flex;gap:12px;padding:16px 0;border-top:1px solid var(--line);
  font-size:15px;line-height:1.75;
}
.compare-list li:first-child{border-top:0;padding-top:0;}
.is-risk .compare-list li{color:var(--muted);}
.compare-list .dot{width:6px;height:6px;border-radius:50%;background:var(--brand);margin-top:9px;flex-shrink:0;}
.is-risk .compare-list .dot{background:var(--line);}

/* ---------- check list ---------- */
.check-list{margin-top:8px;border-top:1px solid var(--line);}
.check-list li{
  display:grid;grid-template-columns:88px 1fr;gap:24px;
  padding:28px 0;border-bottom:1px solid var(--line);
  transition:background .18s var(--ease);
}
.check-list li:hover{background:var(--brand-soft);}
.check-list .idx{
  font-size:clamp(26px,3vw,36px);font-weight:800;color:var(--brand);line-height:1;
  font-variant-numeric:tabular-nums;letter-spacing:-.02em;
  padding-left:8px;
}
.check-list h3{font-size:19px;margin-bottom:8px;}
.check-list p{font-size:15px;line-height:1.8;color:var(--text);max-width:40em;}
.check-list .hint{
  display:inline-block;margin-top:12px;font-size:13px;color:var(--brand-strong);
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-s);
  padding:6px 10px;font-variant-numeric:tabular-nums;
}

/* ---------- spec grid ---------- */
.spec-grid{
  display:grid;grid-template-columns:repeat(3,1fr);
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-m);
  overflow:hidden;
}
.spec-cell{padding:22px 24px;border-right:1px solid var(--line);border-bottom:1px solid var(--line);}
.spec-cell:nth-child(3n){border-right:0;}
.spec-cell:nth-last-child(-n+3){border-bottom:0;}
.spec-label{display:block;font-size:13px;color:var(--muted);margin-bottom:6px;}
.spec-value{display:block;font-size:16px;font-weight:600;color:var(--ink);font-variant-numeric:tabular-nums;overflow-wrap:anywhere;}
.spec-note{margin-top:20px;font-size:13px;color:var(--muted);}

/* ---------- figure ---------- */
.figure-band{display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:center;}
.figure-media{border-radius:var(--radius-l);overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow-2);}
.figure-media img{width:100%;aspect-ratio:4/3;object-fit:cover;transition:transform .22s var(--ease);}
.figure-media:hover img{transform:scale(1.02);}
.figure-copy h2{font-size:clamp(24px,3.2vw,34px);line-height:1.24;}
.figure-copy p{margin-top:16px;font-size:16px;line-height:1.85;}
.figure-points{margin-top:26px;border-top:1px solid var(--line);}
.figure-points li{
  display:flex;align-items:center;gap:12px;
  padding:14px 0;border-bottom:1px solid var(--line);font-size:15px;
}
.figure-points svg{color:var(--brand);flex-shrink:0;}

/* ---------- faq ---------- */
.faq{max-width:880px;margin:0 auto;border-top:1px solid var(--line);}
.faq details{border-bottom:1px solid var(--line);}
.faq summary{
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:22px 4px;cursor:pointer;list-style:none;
  font-size:16px;font-weight:600;color:var(--ink);
  transition:color .18s var(--ease);
}
.faq summary::-webkit-details-marker{display:none;}
.faq summary:hover{color:var(--brand);}
.faq summary .mark{
  width:24px;height:24px;flex-shrink:0;position:relative;
  transition:transform .18s var(--ease);color:var(--brand);
}
.faq details[open] summary{color:var(--brand);}
.faq details[open] summary .mark{transform:rotate(45deg);}
.faq .answer{padding:0 4px 24px;font-size:15px;line-height:1.85;color:var(--text);max-width:40em;}

/* ---------- cta ---------- */
.cta-band{
  background:var(--brand-strong);color:#fff;border-radius:var(--radius-l);
  padding:56px;display:grid;grid-template-columns:1fr auto;gap:40px;align-items:center;
}
.cta-band h2{color:#fff;font-size:clamp(22px,2.6vw,32px);line-height:1.24;}
.cta-band p{margin-top:12px;font-size:15px;color:rgba(255,255,255,.8);max-width:34em;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px;}
.cta-meta{
  margin-top:24px;padding-top:18px;border-top:1px solid rgba(255,255,255,.18);
  font-size:13px;color:rgba(255,255,255,.72);font-variant-numeric:tabular-nums;
  display:flex;flex-wrap:wrap;gap:8px 20px;
}
.qr-box{
  width:112px;background:#fff;border-radius:var(--radius-m);padding:12px;text-align:center;
}
.qr-box img{width:100%;aspect-ratio:1/1;object-fit:cover;border-radius:var(--radius-s);}
.qr-box span{display:block;margin-top:8px;font-size:12px;color:var(--ink);font-weight:600;}

/* ---------- footer ---------- */
.site-footer{background:var(--ink);color:rgba(255,255,255,.72);padding:72px 0 32px;margin-top:0;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;}
.footer-brand .brand{margin-bottom:18px;}
.footer-brand .brand-text{color:#fff;}
.site-footer p{font-size:14px;line-height:1.85;max-width:26em;}
.footer-contact{margin-top:14px;font-size:13px;color:rgba(255,255,255,.6);}
.footer-col h4{color:#fff;font-size:14px;margin-bottom:18px;letter-spacing:.02em;}
.footer-links{display:flex;flex-direction:column;gap:12px;}
.footer-links a{color:rgba(255,255,255,.72);font-size:14px;}
.footer-links a:hover{color:#fff;text-decoration:underline;text-underline-offset:4px;}
.footer-bottom{
  margin-top:48px;padding-top:24px;border-top:1px solid rgba(255,255,255,.1);
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;
  font-size:13px;color:rgba(255,255,255,.55);
}

/* ---------- responsive ---------- */
@media (max-width:1024px){
  .main-nav{display:none;}
  .cmd-search{display:none;}
  .quick-link{display:none;}
  .header-right{gap:10px;}
  .nav-toggle{display:flex;}
  .compare{grid-template-columns:1fr;}
  .figure-band{grid-template-columns:1fr;gap:32px;}
  .spec-grid{grid-template-columns:repeat(2,1fr);}
  .spec-cell:nth-child(3n){border-right:1px solid var(--line);}
  .spec-cell:nth-child(2n){border-right:0;}
  .spec-cell:nth-last-child(-n+3){border-bottom:1px solid var(--line);}
  .spec-cell:nth-last-child(-n+2){border-bottom:0;}
  .cta-band{grid-template-columns:1fr;padding:40px;gap:28px;}
  .qr-box{justify-self:start;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:768px){
  .section{padding:64px 0;}
  .page-hero{padding:52px 0 48px;}
  .header-inner{min-height:56px;}
  .brand-text{font-size:16px;}
  .check-list li{grid-template-columns:1fr;gap:10px;}
  .check-list .idx{padding-left:0;}
  .spec-grid{grid-template-columns:1fr;}
  .spec-cell{border-right:0 !important;border-bottom:1px solid var(--line) !important;}
  .spec-cell:last-child{border-bottom:0 !important;}
  .cta-band{padding:28px 22px;}
  .cta-actions .btn{width:100%;}
  .site-footer{padding:48px 0 28px;}
  .footer-grid{grid-template-columns:1fr;gap:32px;}
  .footer-bottom{flex-direction:column;}
}
@media (max-width:520px){
  .hero-tags li{font-size:11px;}
  .compare-card{padding:24px 20px;}
  .btn{font-size:14px;padding:0 18px;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;}
}

/* roulang page: category4 */
:root{
  --brand:#0D6E62;
  --brand-strong:#095048;
  --brand-soft:#E7F1EE;
  --accent:#F1713B;
  --ink:#0B0F0E;
  --text:#3B4442;
  --muted:#8A928F;
  --bg:#F6F7F5;
  --surface:#FFFFFF;
  --line:#E3E7E4;
  --radius-s:8px;
  --radius-m:14px;
  --radius-l:22px;
  --radius-pill:999px;
  --shadow-1:0 1px 2px rgba(11,15,14,.04),0 8px 24px rgba(11,15,14,.05);
  --shadow-2:0 18px 48px rgba(11,15,14,.10);
  --maxw:1200px;
  --gutter:clamp(20px,4vw,48px);
  --ease:cubic-bezier(.2,.7,.3,1);
  --font:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.8;
  color:var(--text);
  background:var(--bg);
  overflow-x:hidden;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
button{background:none;border:0;cursor:pointer}
h1,h2,h3,h4{margin:0;color:var(--ink);font-weight:700;letter-spacing:-.015em;line-height:1.25}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px}

.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 var(--gutter)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 24px;border-radius:var(--radius-pill);
  font-size:15px;font-weight:600;letter-spacing:.01em;
  border:1.5px solid transparent;
  transition:background-color .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease),box-shadow .18s var(--ease);
}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:var(--brand-strong);transform:translateY(-1px);box-shadow:var(--shadow-1)}
.btn-primary:active{transform:translateY(0)}
.btn-outline{border-color:var(--line);color:var(--ink);background:transparent}
.btn-outline:hover{border-color:var(--brand);background:var(--brand-soft);color:var(--brand-strong)}
.btn-accent{background:var(--accent);color:#fff}
.btn-accent:hover{filter:brightness(.95);transform:translateY(-1px)}
.btn-light{background:#fff;color:var(--brand-strong)}
.btn-light:hover{background:var(--brand-soft)}
.btn-ghost-light{border-color:rgba(255,255,255,.42);color:#fff}
.btn-ghost-light:hover{background:rgba(255,255,255,.14)}
.btn-sm{min-height:36px;padding:0 18px;font-size:14px}
.btn-lg{min-height:48px;padding:0 28px}

.link-arrow{
  display:inline-flex;align-items:center;gap:6px;
  color:var(--brand);font-size:14px;font-weight:600;
  transition:color .18s var(--ease);
}
.link-arrow:hover{color:var(--brand-strong)}
.link-arrow svg{transition:transform .18s var(--ease)}
.link-arrow:hover svg{transform:translateX(3px)}

.badge,.chip{
  display:inline-flex;align-items:center;gap:6px;
  padding:6px 12px;border-radius:var(--radius-pill);
  font-size:12px;font-weight:600;letter-spacing:.04em;
  background:var(--brand-soft);color:var(--brand-strong);
}
.chip{background:var(--surface);border:1px solid var(--line);color:var(--text);font-weight:500;letter-spacing:0}
.chip.is-active,.chip:hover{border-color:var(--brand);background:var(--brand-soft);color:var(--brand-strong)}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(255,255,255,.92);
  border-bottom:1px solid var(--line);
  backdrop-filter:blur(8px);
  transition:box-shadow .18s var(--ease),background-color .18s var(--ease);
}
.site-header.is-stuck{box-shadow:var(--shadow-1);background:rgba(255,255,255,.97)}
.header-inner{display:flex;align-items:center;gap:24px;min-height:64px}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{
  width:32px;height:32px;border-radius:10px;background:var(--brand);color:#fff;
  display:inline-flex;align-items:center;justify-content:center;flex-shrink:0;
}
.brand-text{font-size:17px;font-weight:700;color:var(--ink);letter-spacing:-.01em;white-space:nowrap}
.main-nav{display:flex;align-items:center;gap:26px;margin-left:8px}
.nav-link{
  position:relative;padding:6px 0;font-size:14px;font-weight:500;color:var(--text);
  transition:color .18s var(--ease);white-space:nowrap;
}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:1px;background:var(--ink);
  transform:scaleX(0);transform-origin:left;transition:transform .18s var(--ease);
}
.nav-link:hover{color:var(--ink)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.is-active{color:var(--ink);font-weight:600}
.nav-link.is-active::after{
  left:50%;right:auto;width:20px;height:2px;border-radius:2px;background:var(--brand);
  transform:translateX(-50%) scaleX(1);
}
.header-actions{display:flex;align-items:center;gap:14px;margin-left:auto}
.command-search{
  display:flex;align-items:center;gap:8px;height:36px;width:200px;padding:0 10px 0 12px;
  border:1px solid var(--line);border-radius:var(--radius-pill);background:var(--surface);color:var(--muted);
  transition:width .2s var(--ease),border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.command-search:focus-within{
  width:260px;border-color:var(--brand);
  box-shadow:0 0 0 4px rgba(13,110,98,.12);
}
.command-search input{
  flex:1;min-width:0;border:0;background:transparent;outline:none;font-size:13px;color:var(--ink);
}
.command-search input::placeholder{color:var(--muted)}
.kbd{
  flex-shrink:0;height:20px;padding:0 6px;border:1px solid var(--line);border-radius:6px;
  font-size:11px;line-height:18px;color:var(--muted);font-variant-numeric:tabular-nums;
}
.ghost-link{font-size:14px;color:var(--text);transition:color .18s var(--ease)}
.ghost-link:hover{color:var(--brand)}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:12px;align-items:center;justify-content:center;
  border:1px solid var(--line);background:var(--surface);color:var(--ink);
}
.nav-toggle span{display:block;width:18px;height:1.5px;background:currentColor;margin:3px auto;transition:transform .2s var(--ease),opacity .2s var(--ease)}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(4.5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-4.5px) rotate(-45deg)}

.mobile-drawer{
  display:none;border-top:1px solid var(--line);background:var(--surface);
  padding:12px var(--gutter) 24px;
}
.mobile-drawer.is-open{display:block;animation:drawerIn .2s var(--ease)}
@keyframes drawerIn{from{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:translateY(0)}}
.mobile-drawer .drawer-link{
  display:flex;align-items:center;justify-content:space-between;
  min-height:52px;border-bottom:1px solid var(--line);font-size:15px;color:var(--ink);
}
.mobile-drawer .drawer-link.is-active{color:var(--brand);font-weight:600}
.mobile-drawer .command-search{width:100%;margin:16px 0 14px}
.mobile-drawer .command-search:focus-within{width:100%}
.mobile-drawer .btn{width:100%}

/* ---------- page hero ---------- */
.page-hero{
  position:relative;overflow:hidden;color:#fff;
  background-image:linear-gradient(105deg,rgba(6,42,38,.90) 0%,rgba(9,80,72,.78) 52%,rgba(11,15,14,.55) 100%),url('/assets/images/backpic/back-1.webp');
  background-size:cover;background-position:center;
}
.page-hero .container{padding-top:56px;padding-bottom:56px}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:rgba(255,255,255,.72)}
.breadcrumb a{color:rgba(255,255,255,.72);transition:color .18s var(--ease)}
.breadcrumb a:hover{color:#fff}
.breadcrumb span[aria-current]{color:#fff}
.page-hero h1{
  margin-top:20px;max-width:22em;color:#fff;
  font-size:clamp(28px,3.6vw,44px);line-height:1.2;letter-spacing:-.02em;
}
.page-hero .hero-sub{margin-top:16px;max-width:40em;font-size:16px;line-height:1.85;color:rgba(255,255,255,.84)}
.hero-chips{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.hero-chips .chip{background:rgba(255,255,255,.12);border-color:rgba(255,255,255,.28);color:#fff}
.hero-chips .chip:hover{background:#fff;border-color:#fff;color:var(--brand-strong)}

/* ---------- section base ---------- */
.section{padding:88px 0}
.section--tight{padding:64px 0}
.section--bg{background:var(--surface)}
.section-head{max-width:44em;margin-bottom:40px}
.section-head h2{font-size:clamp(23px,2.6vw,32px);letter-spacing:-.02em}
.section-head p{margin-top:14px;font-size:15px;color:var(--muted)}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-size:12px;font-weight:600;letter-spacing:.14em;color:var(--brand);
  text-transform:none;margin-bottom:14px;
}
.eyebrow::before{content:"";width:24px;height:2px;border-radius:2px;background:var(--brand)}

/* ---------- help layout ---------- */
.help-layout{display:grid;grid-template-columns:250px minmax(0,1fr);gap:56px;align-items:start}
.help-aside{position:sticky;top:96px}
.help-aside .aside-title{
  font-size:12px;font-weight:600;letter-spacing:.12em;color:var(--muted);margin-bottom:14px;
}
.group-nav li + li{margin-top:2px}
.group-nav a{
  display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:var(--radius-s);
  font-size:14px;color:var(--text);border-left:2px solid transparent;
  transition:background-color .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.group-nav a:hover{background:var(--brand-soft);color:var(--brand-strong)}
.group-nav a.is-current{background:var(--brand-soft);border-left-color:var(--brand);color:var(--brand-strong);font-weight:600}
.group-nav .idx{font-size:12px;color:var(--muted);font-variant-numeric:tabular-nums}
.aside-note{
  margin-top:24px;padding:18px;border:1px solid var(--line);border-radius:var(--radius-m);
  background:var(--surface);font-size:13px;line-height:1.75;color:var(--muted);
}

.faq-group + .faq-group{margin-top:56px}
.faq-group-head{border-bottom:1px solid var(--line);padding-bottom:16px;margin-bottom:8px}
.faq-group-head h3{font-size:clamp(18px,1.6vw,22px)}
.faq-group-head p{margin-top:8px;font-size:14px;color:var(--muted)}

.faq-item{border-bottom:1px solid var(--line)}
.faq-item summary{
  display:flex;align-items:flex-start;justify-content:space-between;gap:20px;
  padding:20px 0;cursor:pointer;list-style:none;
  font-size:16px;font-weight:600;color:var(--ink);
  transition:color .18s var(--ease);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--brand)}
.faq-item[open] summary{color:var(--brand)}
.faq-icon{
  flex-shrink:0;width:24px;height:24px;margin-top:2px;color:var(--muted);
  transition:transform .18s var(--ease),color .18s var(--ease);
}
.faq-item[open] .faq-icon{transform:rotate(45deg);color:var(--brand)}
.faq-body{padding:0 0 22px;font-size:15px;line-height:1.85;color:var(--text);max-width:40em}
.faq-body ol{margin:12px 0 0;padding-left:0;counter-reset:step}
.faq-body ol li{
  position:relative;padding-left:28px;margin-top:8px;counter-increment:step;
}
.faq-body ol li::before{
  content:counter(step);position:absolute;left:0;top:5px;
  width:18px;height:18px;border-radius:50%;background:var(--brand-soft);color:var(--brand-strong);
  font-size:11px;font-weight:700;display:flex;align-items:center;justify-content:center;line-height:1;
}

/* ---------- checklist ---------- */
.checklist{border-top:1px solid var(--line)}
.checklist li{
  display:grid;grid-template-columns:64px minmax(0,1fr);gap:20px;align-items:start;
  padding:26px 0;border-bottom:1px solid var(--line);
  transition:transform .2s var(--ease);
}
.checklist li:hover{transform:translateX(4px)}
.checklist .num{
  font-size:clamp(24px,2.4vw,34px);font-weight:800;color:var(--brand);
  line-height:1.1;font-variant-numeric:tabular-nums;
}
.checklist h3{font-size:18px;font-weight:600}
.checklist p{margin-top:8px;font-size:15px;line-height:1.8;color:var(--text);max-width:46em}

/* ---------- media block ---------- */
.media-split{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,1fr);gap:56px;align-items:center}
.media-figure{
  border-radius:var(--radius-l);overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow-2);
  aspect-ratio:4/3;background:var(--surface);
}
.media-figure img{width:100%;height:100%;object-fit:cover;transition:transform .22s var(--ease)}
.media-figure:hover img{transform:scale(1.03)}
.media-copy h2{font-size:clamp(23px,2.6vw,32px)}
.media-copy > p{margin-top:14px;font-size:15px;line-height:1.85;color:var(--text);max-width:40em}
.mini-list{margin-top:26px;border-top:1px solid var(--line)}
.mini-list li{
  display:flex;gap:12px;align-items:flex-start;
  padding:16px 0;border-bottom:1px solid var(--line);font-size:15px;line-height:1.75;
}
.mini-list svg{flex-shrink:0;margin-top:4px;color:var(--brand)}

/* ---------- form ---------- */
.form-panel{
  display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:56px;align-items:start;
}
.contact-form{max-width:560px;width:100%}
.field{margin-bottom:18px}
.field label{display:block;font-size:13px;font-weight:600;color:var(--ink);margin-bottom:8px}
.field input,.field textarea,.field select{
  width:100%;min-height:46px;padding:10px 14px;
  border:1px solid var(--line);border-radius:12px;background:var(--surface);
  font-size:15px;color:var(--ink);outline:none;
  transition:border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.field textarea{min-height:120px;resize:vertical;line-height:1.7}
.field input:focus,.field textarea:focus,.field select:focus{
  border-color:var(--brand);box-shadow:0 0 0 4px rgba(13,110,98,.12);
}
.field .hint{margin-top:8px;font-size:12px;color:var(--muted)}
.form-note{margin-top:14px;font-size:12px;color:var(--muted)}
.info-card{
  padding:28px;border:1px solid var(--line);border-radius:var(--radius-m);background:var(--surface);
}
.info-card h3{font-size:18px}
.info-card dl{margin:18px 0 0}
.info-card dt{font-size:13px;color:var(--muted)}
.info-card dd{margin:2px 0 16px;font-size:16px;font-weight:600;color:var(--ink);font-variant-numeric:tabular-nums}
.info-card dd:last-child{margin-bottom:0}

/* ---------- cta band ---------- */
.cta-band{padding:0 0 88px}
.cta-inner{
  position:relative;overflow:hidden;border-radius:var(--radius-l);
  background:linear-gradient(120deg,var(--brand-strong),var(--brand));
  color:#fff;padding:48px;display:grid;grid-template-columns:minmax(0,1fr) auto;gap:36px;align-items:center;
}
.cta-inner h2{color:#fff;font-size:clamp(22px,2.4vw,30px);max-width:20em}
.cta-inner p{margin-top:12px;font-size:15px;line-height:1.8;color:rgba(255,255,255,.82);max-width:38em}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}
.cta-meta{
  margin-top:18px;font-size:13px;color:rgba(255,255,255,.72);
  font-variant-numeric:tabular-nums;display:flex;flex-wrap:wrap;gap:8px 18px;
}

/* ---------- footer ---------- */
.site-footer{background:var(--ink);color:rgba(255,255,255,.72);padding:72px 0 32px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px}
.footer-brand .brand-text{color:#fff}
.footer-brand .brand-mark{background:rgba(255,255,255,.12)}
.footer-brand p{margin-top:16px;font-size:14px;line-height:1.8;max-width:22em}
.footer-contact{margin-top:14px;font-size:13px;color:rgba(255,255,255,.6)}
.footer-col h4{color:#fff;font-size:14px;font-weight:600;margin-bottom:16px;letter-spacing:.02em}
.footer-links{display:flex;flex-direction:column;gap:10px}
.footer-links a{font-size:14px;color:rgba(255,255,255,.72);transition:color .18s var(--ease)}
.footer-links a:hover{color:#fff;text-decoration:underline;text-underline-offset:4px}
.footer-bottom{
  margin-top:48px;padding-top:22px;border-top:1px solid rgba(255,255,255,.1);
  display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;font-size:13px;color:rgba(255,255,255,.6);
}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .42s var(--ease),transform .42s var(--ease)}
.reveal.is-in{opacity:1;transform:none}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;transition-duration:.001ms !important}
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none}
}

/* ---------- responsive ---------- */
@media (max-width:1080px){
  .main-nav{display:none}
  .command-search{display:none}
  .nav-toggle{display:inline-flex}
  .help-layout{grid-template-columns:minmax(0,1fr);gap:36px}
  .help-aside{position:static}
  .group-nav{display:flex;gap:8px;overflow-x:auto;padding-bottom:6px;-webkit-overflow-scrolling:touch}
  .group-nav li + li{margin-top:0}
  .group-nav a{white-space:nowrap;border-left:0;border:1px solid var(--line);border-radius:var(--radius-pill);padding:8px 14px}
  .group-nav a.is-current{border-color:var(--brand)}
  .aside-note{display:none}
}
@media (max-width:900px){
  .section{padding:72px 0}
  .media-split{grid-template-columns:minmax(0,1fr);gap:32px}
  .form-panel{grid-template-columns:minmax(0,1fr);gap:36px}
  .cta-inner{grid-template-columns:minmax(0,1fr);padding:36px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:768px){
  .header-inner{min-height:56px;gap:14px}
  .ghost-link{display:none}
  .page-hero .container{padding-top:40px;padding-bottom:44px}
  .section{padding:60px 0}
  .checklist li{grid-template-columns:44px minmax(0,1fr);gap:14px;padding:22px 0}
  .cta-band{padding-bottom:60px}
}
@media (max-width:520px){
  .brand-text{font-size:15px}
  .btn-lg{width:100%;min-height:48px}
  .cta-actions{width:100%}
  .cta-actions .btn{width:100%}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;gap:8px}
  .hero-chips .chip{font-size:12px}
}