/* roulang page: index */
:root{
  --c-primary:#1D5BD6;
  --c-primary-deep:#123A8C;
  --c-primary-soft:#E6EEFC;
  --c-accent:#FF7A2F;
  --c-accent-soft:#FFF1E7;
  --c-ch-a:#1D5BD6;
  --c-ch-b:#0E9F9F;
  --c-ch-c:#E2621B;
  --c-ch-d:#5B5BD6;
  --c-text:#0E1726;
  --c-text-2:#4A5A70;
  --c-text-3:#8593A6;
  --c-line:#DFE6F0;
  --c-line-soft:#EDF2F9;
  --c-bg:#F4F7FB;
  --c-surface:#FFFFFF;
  --c-surface-2:#EDF2F9;
  --r-s:8px;
  --r-m:12px;
  --r-l:16px;
  --r-xl:22px;
  --pill:999px;
  --sd-1:0 1px 2px rgba(15,32,66,.06),0 1px 3px rgba(15,32,66,.05);
  --sd-2:0 6px 20px rgba(15,32,66,.08);
  --sd-3:0 16px 40px rgba(15,32,66,.12);
  --tr:180ms 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","HarmonyOS Sans SC","Noto Sans SC",system-ui,"Microsoft YaHei",sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--c-text);
  background:var(--c-bg);
  font-variant-numeric:tabular-nums;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button,input{font:inherit;color:inherit}
button{cursor:pointer;border:0;background:none}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{padding:0;list-style:none}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;border-radius:4px}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:88px 0}
.section-tight{padding:56px 0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:32px}
.section-head h2{font-size:30px;font-weight:600;letter-spacing:.2px}
.section-head .sub{font-size:14px;color:var(--c-text-2);margin-top:8px}
.muted{color:var(--c-text-2)}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;color:var(--c-primary);background:var(--c-primary-soft);height:28px;padding:0 12px;border-radius:var(--pill)}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:44px;padding:0 22px;border-radius:var(--r-m);border:1px solid transparent;font-size:15px;font-weight:600;transition:transform var(--tr),background var(--tr),border-color var(--tr),box-shadow var(--tr);white-space:nowrap}
.btn-primary{background:var(--c-primary);color:#fff;box-shadow:var(--sd-1)}
.btn-primary:hover{background:var(--c-primary-deep);transform:translateY(-1px);box-shadow:var(--sd-2)}
.btn-accent{background:var(--c-accent);color:#fff}
.btn-accent:hover{background:#EE661B;transform:translateY(-1px)}
.btn-ghost{background:var(--c-surface);border-color:var(--c-line);color:var(--c-text)}
.btn-ghost:hover{background:var(--c-primary-soft);border-color:var(--c-primary);color:var(--c-primary-deep)}
.btn.is-disabled{background:var(--c-surface-2);color:var(--c-text-3);cursor:not-allowed;box-shadow:none}
.text-link{display:inline-flex;align-items:center;gap:6px;color:var(--c-primary);font-size:14px;font-weight:600}
.text-link span{transition:transform var(--tr)}
.text-link:hover span{transform:translateX(3px)}

/* badges */
.badge{display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:var(--pill);font-size:12px;font-weight:600;background:var(--c-primary-soft);color:var(--c-primary)}
.badge-b{background:rgba(14,159,159,.12);color:#0E9F9F}
.badge-c{background:rgba(226,98,27,.12);color:#C4520F}
.badge-d{background:rgba(91,91,214,.12);color:#4A4AC0}
.badge-outline{background:transparent;border:1px solid var(--c-accent);color:#D95F16}
.time-tag{display:inline-flex;align-items:center;gap:6px;font-size:13px;color:var(--c-text-3)}
.time-tag svg{width:14px;height:14px;stroke:var(--c-text-3)}

/* header */
.site-header{background:var(--c-surface);border-bottom:1px solid var(--c-line)}
.header-top{display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:68px;position:sticky;top:0;z-index:60;background:var(--c-surface);transition:box-shadow var(--tr)}
.site-header.is-scrolled .header-top{box-shadow:var(--sd-1)}
.brand{display:flex;align-items:center;gap:10px}
.brand-mark{width:38px;height:38px;flex:0 0 38px;border-radius:10px;background:linear-gradient(160deg,var(--c-primary),var(--c-primary-deep));display:grid;place-items:center}
.brand-mark svg{width:22px;height:22px}
.brand-text{display:flex;flex-direction:column;line-height:1.2}
.brand-name{font-size:20px;font-weight:600;letter-spacing:.3px}
.brand-sub{font-size:12px;color:var(--c-text-3);letter-spacing:2px}
.header-tools{display:flex;align-items:center;gap:18px}
.search{position:relative;display:flex;align-items:center;background:var(--c-surface-2);border:1px solid transparent;border-radius:var(--pill);height:40px;padding:0 14px;transition:background var(--tr),border-color var(--tr),box-shadow var(--tr)}
.search:focus-within{background:var(--c-surface);border-color:var(--c-primary);box-shadow:0 0 0 3px rgba(29,91,214,.15)}
.search svg{width:16px;height:16px;stroke:var(--c-text-3);margin-right:8px;flex:0 0 16px}
.search input{border:0;background:transparent;outline:0;width:190px;font-size:14px}
.search input::placeholder{color:var(--c-text-3)}
.tool-link{font-size:14px;color:var(--c-text-2);transition:color var(--tr)}
.tool-link:hover{color:var(--c-primary)}

/* nav */
.site-nav{background:var(--c-surface-2);border-bottom:1px solid var(--c-line)}
.nav-inner{position:relative;display:flex;align-items:center;height:52px;overflow-x:auto;scrollbar-width:none;-ms-overflow-style:none}
.nav-inner::-webkit-scrollbar{display:none}
.nav-list{display:flex;align-items:center;gap:28px;min-width:max-content}
.nav-link{position:relative;display:inline-flex;align-items:center;height:52px;font-size:15px;color:var(--c-text-2);padding:0 10px;border-radius:var(--r-s);transition:color var(--tr),background var(--tr)}
.nav-link::after{content:"";position:absolute;left:10px;right:10px;bottom:0;height:2px;border-radius:2px;background:transparent;transition:background var(--tr)}
.nav-link:hover{color:var(--c-primary);background:var(--c-primary-soft)}
.nav-link.is-active{color:var(--c-primary);font-weight:600}
.nav-link.is-active::after{background:var(--c-primary)}
.nav-fade{position:absolute;right:0;top:0;bottom:0;width:48px;background:linear-gradient(90deg,rgba(237,242,249,0),var(--c-surface-2));pointer-events:none}

/* hero */
.hero{position:relative;padding:56px 0 72px;background-image:linear-gradient(180deg,rgba(18,58,140,.72),rgba(18,58,140,.55)),url('/assets/images/backpic/back-1.webp');background-size:cover;background-position:center}
.hero-card{background:var(--c-surface);border-radius:var(--r-xl);box-shadow:var(--sd-3);padding:44px;display:grid;grid-template-columns:1.08fr .92fr;gap:40px;align-items:center}
.hero-copy h1{font-size:44px;line-height:1.28;font-weight:600;margin:18px 0 16px;letter-spacing:.3px}
.hero-copy .hero-sub{font-size:16px;color:var(--c-text-2);max-width:34em}
.hero-actions{display:flex;gap:14px;margin-top:28px;flex-wrap:wrap}
.hero-meta{display:flex;gap:28px;margin-top:32px;padding-top:24px;border-top:1px solid var(--c-line-soft);flex-wrap:wrap}
.hero-meta li{min-width:110px}
.hero-meta b{display:block;font-size:24px;font-weight:600;color:var(--c-primary-deep)}
.hero-meta span{font-size:13px;color:var(--c-text-3)}
.hero-media{border-radius:var(--r-l);overflow:hidden;background:var(--c-surface-2);box-shadow:var(--sd-2)}
.hero-media img{width:100%;height:320px;object-fit:cover}

/* channel quick bar */
.channel-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.channel-card{display:block;background:var(--c-surface);border:1px solid var(--c-line-soft);border-radius:var(--r-l);padding:24px;box-shadow:var(--sd-1);transition:transform var(--tr),box-shadow var(--tr),border-color var(--tr)}
.channel-card:hover{transform:translateY(-4px);box-shadow:var(--sd-3);border-color:var(--c-line)}
.channel-icon{width:44px;height:44px;border-radius:12px;display:grid;place-items:center;margin-bottom:16px}
.channel-icon svg{width:22px;height:22px}
.ci-a{background:rgba(29,91,214,.12)}
.ci-a svg{stroke:var(--c-ch-a)}
.ci-b{background:rgba(14,159,159,.12)}
.ci-b svg{stroke:var(--c-ch-b)}
.ci-c{background:rgba(226,98,27,.12)}
.ci-c svg{stroke:var(--c-ch-c)}
.ci-d{background:rgba(91,91,214,.12)}
.ci-d svg{stroke:var(--c-ch-d)}
.channel-card h3{font-size:17px;font-weight:600;margin-bottom:8px}
.channel-card p{font-size:14px;color:var(--c-text-2);min-height:44px}

/* collection grid */
.collection-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.card{background:var(--c-surface);border:1px solid var(--c-line-soft);border-radius:var(--r-l);box-shadow:var(--sd-1);overflow:hidden;transition:transform var(--tr),box-shadow var(--tr)}
.card:hover{transform:translateY(-4px);box-shadow:var(--sd-3)}
.thumb{position:relative;background:var(--c-surface-2);overflow:hidden}
.thumb img{width:100%;height:100%;object-fit:cover;transition:transform 320ms cubic-bezier(.2,.7,.3,1)}
.card:hover .thumb img{transform:scale(1.04)}
.thumb-32{aspect-ratio:3/2}
.count-badge{position:absolute;right:12px;top:12px;background:rgba(14,23,38,.72);color:#fff;font-size:12px;font-weight:600;padding:4px 10px;border-radius:var(--pill)}
.collection-body{padding:18px 20px 22px}
.collection-body h3{font-size:17px;font-weight:600;margin-bottom:6px}
.collection-body p{font-size:13px;color:var(--c-text-3)}

/* news list */
.news-filter{display:flex;gap:10px;flex-wrap:wrap}
.chip{display:inline-flex;align-items:center;height:32px;padding:0 14px;border-radius:var(--pill);background:var(--c-surface);border:1px solid var(--c-line);font-size:13px;color:var(--c-text-2);transition:all var(--tr)}
.chip:hover{border-color:var(--c-primary);color:var(--c-primary);background:var(--c-primary-soft)}
.chip.is-on{background:var(--c-primary);border-color:var(--c-primary);color:#fff}
.news-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.news-card{background:var(--c-surface);border:1px solid var(--c-line-soft);border-radius:var(--r-l);box-shadow:var(--sd-1);padding:26px 28px;display:flex;flex-direction:column;gap:12px;transition:transform var(--tr),box-shadow var(--tr)}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--sd-2)}
.news-meta{display:flex;align-items:center;gap:14px;flex-wrap:wrap}
.news-card h3{font-size:19px;font-weight:600;line-height:1.6}
.news-card h3 a{transition:color var(--tr)}
.news-card:hover h3 a{color:var(--c-primary)}
.news-desc{font-size:15px;color:var(--c-text-2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-card .text-link{margin-top:auto}
.empty-card{grid-column:1/-1;border:1px dashed var(--c-line);border-radius:var(--r-l);background:var(--c-surface);padding:44px 24px;text-align:center;display:flex;flex-direction:column;align-items:center;gap:16px}
.empty-card svg{width:34px;height:34px;stroke:var(--c-text-3)}
.empty-card p{color:var(--c-text-2);font-size:15px}

/* featured timeline */
.timeline{position:relative;padding-left:34px}
.timeline::before{content:"";position:absolute;left:9px;top:8px;bottom:8px;width:2px;background:var(--c-line)}
.tl-item{position:relative;padding:0 0 28px 0}
.tl-item:last-child{padding-bottom:0}
.tl-item::before{content:"";position:absolute;left:-34px;top:8px;width:12px;height:12px;border-radius:50%;background:var(--c-accent);box-shadow:0 0 0 4px var(--c-accent-soft)}
.tl-item h3{font-size:17px;font-weight:600;display:flex;gap:10px;align-items:baseline}
.tl-item h3 em{font-style:normal;font-size:13px;color:var(--c-accent);font-weight:600}
.tl-item p{font-size:14px;color:var(--c-text-2);margin-top:6px}
.tl-item a:hover{color:var(--c-primary)}

/* advantage split */
.split{display:grid;grid-template-columns:.85fr 1.15fr;gap:48px;align-items:start}
.split-left h2{font-size:30px;font-weight:600;line-height:1.45}
.split-left p{font-size:15px;color:var(--c-text-2);margin-top:14px}
.bar-item{display:flex;gap:18px;background:var(--c-surface);border:1px solid var(--c-line-soft);border-radius:var(--r-l);padding:24px;box-shadow:var(--sd-1);margin-bottom:16px}
.bar-item:last-child{margin-bottom:0}
.bar-item .ico{width:44px;height:44px;flex:0 0 44px;border-radius:12px;background:var(--c-primary-soft);display:grid;place-items:center}
.bar-item .ico svg{width:22px;height:22px;stroke:var(--c-primary)}
.bar-item h3{font-size:17px;font-weight:600;margin-bottom:6px}
.bar-item p{font-size:14px;color:var(--c-text-2)}

/* recommend */
.reco-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.reco-item{display:flex;gap:16px;align-items:center;background:var(--c-surface);border:1px solid var(--c-line-soft);border-radius:var(--r-l);padding:14px;box-shadow:var(--sd-1);transition:transform var(--tr),box-shadow var(--tr)}
.reco-item:hover{transform:translateY(-3px);box-shadow:var(--sd-2)}
.reco-item img{width:80px;height:80px;flex:0 0 80px;border-radius:var(--r-m);object-fit:cover;background:var(--c-surface-2)}
.reco-item h3{font-size:16px;font-weight:600;line-height:1.5}
.reco-item:hover h3{color:var(--c-primary)}
.reco-item p{font-size:13px;color:var(--c-text-3);margin-top:4px}
.tag-cloud{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px;padding-top:24px;border-top:1px solid var(--c-line)}
.tag-cloud a{display:inline-flex;align-items:center;height:32px;padding:0 14px;border-radius:var(--pill);background:var(--c-surface);border:1px solid var(--c-line);font-size:13px;color:var(--c-text-2);transition:all var(--tr)}
.tag-cloud a:hover{border-color:var(--c-primary);color:var(--c-primary);background:var(--c-primary-soft)}

/* cta bar */
.cta-bar{background:var(--c-surface);border:1px solid var(--c-line-soft);border-radius:var(--r-xl);box-shadow:var(--sd-2);padding:32px 36px;display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap}
.cta-bar h2{font-size:22px;font-weight:600}
.cta-bar p{font-size:14px;color:var(--c-text-2);margin-top:6px}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap}

/* faq */
.faq-list{display:grid;gap:14px}
.faq-item{background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-m);overflow:hidden;transition:box-shadow var(--tr)}
.faq-item.is-open{box-shadow:var(--sd-2)}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:56px;padding:0 20px;font-size:16px;font-weight:600;text-align:left;position:relative}
.faq-q::before{content:"";position:absolute;left:0;top:12px;bottom:12px;width:3px;border-radius:0 3px 3px 0;background:var(--c-primary)}
.faq-q svg{width:16px;height:16px;stroke:var(--c-primary);transition:transform var(--tr);flex:0 0 16px}
.faq-item.is-open .faq-q svg{transform:rotate(90deg)}
.faq-a{display:none;padding:0 20px 20px 20px;font-size:15px;line-height:1.9;color:var(--c-text-2)}
.faq-item.is-open .faq-a{display:block}

/* footer */
.site-footer{background:var(--c-primary-deep);color:rgba(255,255,255,.82);margin-top:88px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;padding:56px 0 36px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand .brand-mark{background:rgba(255,255,255,.14)}
.footer-brand .brand-name{color:#fff}
.footer-brand .brand-sub{color:rgba(255,255,255,.6)}
.footer-grid p{font-size:14px;line-height:1.9;color:rgba(255,255,255,.72)}
.footer-col h3{font-size:15px;font-weight:600;color:#fff;margin-bottom:16px}
.footer-col ul{display:grid;gap:10px}
.footer-col a{font-size:14px;color:rgba(255,255,255,.78);transition:color var(--tr)}
.footer-col a:hover{color:var(--c-accent);text-decoration:underline;text-underline-offset:4px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.16);padding:18px 0;font-size:12px;color:rgba(255,255,255,.62);display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}

/* responsive */
@media (max-width:1279px){
  .hero-copy h1{font-size:38px}
  .collection-grid{grid-template-columns:repeat(3,1fr)}
}
@media (max-width:1023px){
  .section{padding:64px 0}
  .hero-card{grid-template-columns:1fr;padding:32px}
  .hero-media img{height:260px}
  .channel-grid{grid-template-columns:repeat(2,1fr)}
  .collection-grid{grid-template-columns:repeat(2,1fr)}
  .news-grid{grid-template-columns:1fr}
  .split{grid-template-columns:1fr;gap:28px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:767px){
  .header-top{min-height:60px}
  .search{display:none}
  .nav-list{gap:20px}
  .hero{padding:32px 0 48px}
  .hero-copy h1{font-size:30px}
  .hero-media img{height:210px}
  .section-head{flex-direction:column;align-items:flex-start;gap:14px}
  .section-head h2,.split-left h2{font-size:24px}
  .reco-grid{grid-template-columns:1fr}
  .cta-bar{padding:26px 22px}
  .cta-actions{width:100%}
  .cta-actions .btn{flex:1 1 auto}
}
@media (max-width:559px){
  .container{padding:0 16px}
  .hero-card{padding:24px 20px}
  .hero-copy h1{font-size:26px}
  .hero-actions .btn{width:100%}
  .hero-meta{gap:18px}
  .channel-grid{grid-template-columns:1fr}
  .collection-grid{grid-template-columns:1fr}
  .news-card{padding:20px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .site-footer{margin-top:56px}
}

/* roulang page: category1 */
:root{
  --c-primary:#1D5BD6;
  --c-primary-deep:#123A8C;
  --c-primary-soft:#E6EEFC;
  --c-accent:#FF7A2F;
  --c-accent-deep:#E8661F;
  --c-accent-soft:#FFF1E7;
  --c-channel:#1D5BD6;
  --c-text:#0E1726;
  --c-text-2:#4A5A70;
  --c-text-3:#8593A6;
  --c-line:#DFE6F0;
  --c-line-soft:#EDF2F9;
  --c-bg:#F4F7FB;
  --c-surface:#FFFFFF;
  --c-surface-2:#EDF2F9;
  --r-s:8px;
  --r-m:12px;
  --r-l:16px;
  --r-xl:22px;
  --sd-1:0 1px 2px rgba(15,32,66,.06),0 1px 3px rgba(15,32,66,.05);
  --sd-2:0 6px 20px rgba(15,32,66,.08);
  --sd-3:0 16px 40px rgba(15,32,66,.12);
  --t:180ms cubic-bezier(.2,.7,.3,1);
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans SC","Noto Sans SC",system-ui,"Microsoft YaHei",sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--c-text);
  background:var(--c-bg);
  font-variant-numeric:tabular-nums;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:var(--c-primary);text-decoration:none}
a:visited{color:var(--c-primary)}
h1,h2,h3,h4{margin:0;font-weight:600;line-height:1.35;color:var(--c-text)}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
button{font-family:inherit}
input{font-family:inherit}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}

/* ---------- 顶栏 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:var(--c-surface);
  border-bottom:1px solid var(--c-line);
  transition:box-shadow var(--t);
}
.site-header.is-scrolled{box-shadow:var(--sd-1)}
.header-top{
  display:flex;align-items:center;justify-content:space-between;
  gap:24px;height:68px;
}
.brand{display:inline-flex;align-items:center;gap:10px;text-decoration:none}
.brand-mark{
  width:36px;height:36px;border-radius:var(--r-m);
  background:var(--c-primary);display:grid;place-items:center;flex:none;
}
.brand-mark svg{width:22px;height:22px}
.brand-text{display:flex;flex-direction:column;line-height:1.2}
.brand-name{font-size:20px;font-weight:600;color:var(--c-text);letter-spacing:.01em}
.brand-sub{font-size:12px;color:var(--c-text-3);letter-spacing:.08em}
.header-tools{display:flex;align-items:center;gap:18px}
.search{
  display:flex;align-items:center;gap:8px;
  height:40px;padding:0 16px;
  background:var(--c-surface-2);
  border:1px solid transparent;
  border-radius:999px;
  transition:background var(--t),border-color var(--t),box-shadow var(--t);
}
.search svg{width:17px;height:17px;stroke:var(--c-text-3);fill:none;flex:none}
.search:focus-within{background:var(--c-surface);border-color:var(--c-primary);box-shadow:0 0 0 3px rgba(29,91,214,.15)}
.search input{
  border:0;background:transparent;outline:none;height:100%;
  width:180px;font-size:14px;color:var(--c-text);
}
.search input::placeholder{color:var(--c-text-3)}
.tool-link{font-size:14px;color:var(--c-text-2);text-decoration:none;transition:color var(--t)}
.tool-link:hover{color:var(--c-primary)}

/* ---------- 频道导航 ---------- */
.site-nav{background:var(--c-surface-2);border-top:1px solid var(--c-line-soft)}
.nav-inner{position:relative;display:flex;align-items:center;height:52px}
.nav-list{display:flex;align-items:center;gap:28px;overflow-x:auto;scrollbar-width:none;-ms-overflow-style:none}
.nav-list::-webkit-scrollbar{display:none}
.nav-link{
  position:relative;display:inline-flex;align-items:center;height:52px;
  padding:0 12px;border-radius:var(--r-s);
  font-size:15px;color:var(--c-text-2);white-space:nowrap;
  transition:background var(--t),color var(--t);
}
.nav-link:hover{background:var(--c-primary-soft);color:var(--c-primary)}
.nav-link.is-active{color:var(--c-primary);font-weight:600}
.nav-link.is-active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:0;height:2px;
  background:var(--c-primary);border-radius:2px;
}
.nav-fade{display:none}

/* ---------- 面包屑 ---------- */
.breadcrumb{
  display:flex;align-items:center;flex-wrap:wrap;gap:8px;
  padding:22px 0 0;font-size:13px;color:var(--c-text-3);
}
.breadcrumb a{color:var(--c-text-2);transition:color var(--t)}
.breadcrumb a:hover{color:var(--c-primary)}
.breadcrumb .sep{color:var(--c-text-3)}
.breadcrumb .current{color:var(--c-text-2)}

/* ---------- 频道首屏 ---------- */
.page-hero{
  position:relative;
  margin-top:20px;
  padding:56px 0 64px;
  background-color:var(--c-surface-2);
  background-size:cover;
  background-position:center;
  border-radius:var(--r-xl);
  overflow:hidden;
}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(244,247,251,.94) 0%,rgba(244,247,251,.86) 52%,rgba(244,247,251,.62) 100%);
}
.hero-inner{position:relative;z-index:1}
.hero-panel{
  max-width:660px;background:var(--c-surface);
  border-radius:var(--r-xl);box-shadow:var(--sd-2);
  padding:44px 48px;
}
.channel-tag{
  display:inline-flex;align-items:center;height:28px;padding:0 14px;
  border-radius:999px;font-size:12px;font-weight:600;
  background:rgba(29,91,214,.12);color:var(--c-channel);
}
.hero-panel h1{font-size:44px;margin-top:18px;letter-spacing:-.01em}
.hero-panel h1::after{
  content:"";display:block;width:48px;height:4px;border-radius:2px;
  background:var(--c-channel);margin-top:18px;
}
.hero-lead{margin-top:18px;font-size:16px;line-height:1.9;color:var(--c-text-2);max-width:520px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.hero-meta{
  display:flex;flex-wrap:wrap;gap:32px;
  margin-top:30px;padding-top:22px;border-top:1px solid var(--c-line-soft);
}
.hero-meta li{font-size:13px;color:var(--c-text-3)}
.hero-meta strong{
  display:block;font-size:22px;font-weight:600;color:var(--c-primary);
  line-height:1.4;font-variant-numeric:tabular-nums;
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 22px;border-radius:var(--r-m);
  font-size:15px;font-weight:500;border:1px solid transparent;
  cursor:pointer;text-decoration:none;white-space:nowrap;
  transition:background var(--t),color var(--t),border-color var(--t),transform var(--t),box-shadow var(--t);
}
.btn-primary{background:var(--c-primary);color:#fff}
.btn-primary:hover{background:var(--c-primary-deep);transform:translateY(-1px);box-shadow:var(--sd-2)}
.btn-accent{background:var(--c-accent);color:#fff}
.btn-accent:hover{background:var(--c-accent-deep);transform:translateY(-1px);box-shadow:var(--sd-2)}
.btn-ghost{background:var(--c-surface);border-color:var(--c-line);color:var(--c-text)}
.btn-ghost:hover{background:var(--c-primary-soft);border-color:var(--c-primary);color:var(--c-primary)}
.btn-text{
  display:inline-flex;align-items:center;gap:6px;height:44px;
  font-size:15px;color:var(--c-primary);background:none;border:0;cursor:pointer;padding:0 4px;
  transition:gap var(--t);
}
.btn-text:hover{gap:10px}
.btn[disabled],.btn.is-disabled{background:var(--c-surface-2);color:var(--c-text-3);box-shadow:none;cursor:not-allowed;border-color:transparent}

/* ---------- 板块通用 ---------- */
.section{padding:88px 0}
.section-tight{padding:64px 0}
.section-alt{background:var(--c-surface)}
.section-head{
  display:flex;align-items:flex-end;justify-content:space-between;
  gap:24px;margin-bottom:40px;flex-wrap:wrap;
}
.section-title{font-size:30px}
.section-desc{margin-top:12px;font-size:15px;color:var(--c-text-2);max-width:640px}
.section-more{
  display:inline-flex;align-items:center;gap:6px;
  font-size:15px;color:var(--c-primary);
  transition:gap var(--t);
}
.section-more:hover{gap:10px}

/* ---------- 入口卡片矩阵 ---------- */
.entry-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.entry-card{
  display:flex;flex-direction:column;
  background:var(--c-surface);border:1px solid var(--c-line-soft);
  border-radius:var(--r-l);box-shadow:var(--sd-1);overflow:hidden;
  transition:transform var(--t),box-shadow var(--t),border-color var(--t);
}
.entry-card:hover{transform:translateY(-4px);box-shadow:var(--sd-3);border-color:var(--c-line)}
.entry-card img{width:100%;height:152px;object-fit:cover;background:var(--c-surface-2)}
.entry-body{padding:20px 22px 24px;display:flex;flex-direction:column;flex:1}
.entry-body h3{font-size:17px;margin-bottom:10px}
.entry-body p{font-size:14px;line-height:1.8;color:var(--c-text-2);margin-bottom:16px}
.entry-foot{margin-top:auto;display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.tag{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;
  border-radius:999px;font-size:12px;
  background:rgba(29,91,214,.12);color:var(--c-channel);
}
.tag-soft{background:var(--c-surface-2);color:var(--c-text-2)}
.tag-time{font-size:12px;color:var(--c-text-3)}

/* ---------- 步骤条 ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.step{
  position:relative;background:var(--c-surface);
  border:1px solid var(--c-line-soft);border-radius:var(--r-l);
  padding:28px 24px 30px;box-shadow:var(--sd-1);
  transition:transform var(--t),box-shadow var(--t);
}
.step:hover{transform:translateY(-4px);box-shadow:var(--sd-2)}
.step-num{
  display:inline-block;font-size:30px;font-weight:600;line-height:1;
  color:var(--c-primary);font-variant-numeric:tabular-nums;
}
.step h3{font-size:19px;margin:14px 0 10px}
.step p{font-size:14px;line-height:1.8;color:var(--c-text-2)}

/* ---------- 图文错位区 ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.split-media img{
  width:100%;aspect-ratio:4/3;object-fit:cover;
  border-radius:var(--r-l);box-shadow:var(--sd-2);background:var(--c-surface-2);
}
.split-body h2{font-size:30px}
.split-body .lead{margin-top:14px;font-size:15px;line-height:1.9;color:var(--c-text-2)}
.check-list{margin-top:26px;display:grid;gap:16px}
.check-list li{display:flex;gap:12px;font-size:15px;line-height:1.8;color:var(--c-text-2)}
.check-list li::before{
  content:"✓";display:grid;place-items:center;flex:none;
  width:20px;height:20px;margin-top:6px;border-radius:6px;
  background:var(--c-primary-soft);color:var(--c-primary);
  font-size:12px;font-weight:700;line-height:1;
}
.check-list strong{color:var(--c-text);font-weight:600}

/* ---------- FAQ ---------- */
.faq{display:grid;gap:12px;max-width:880px;margin:0 auto}
.faq-item{
  background:var(--c-surface);border:1px solid var(--c-line);
  border-left:3px solid var(--c-channel);
  border-radius:var(--r-m);overflow:hidden;
  transition:box-shadow var(--t);
}
.faq-item:hover{box-shadow:var(--sd-1)}
.faq-q{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  width:100%;min-height:56px;padding:12px 20px;
  background:none;border:0;cursor:pointer;text-align:left;
  font-size:16px;font-weight:500;color:var(--c-text);
}
.faq-arrow{flex:none;color:var(--c-text-3);transition:transform var(--t),color var(--t)}
.faq-item.is-open .faq-arrow{transform:rotate(90deg);color:var(--c-primary)}
.faq-a{display:none;padding:0 20px 20px;font-size:15px;line-height:1.9;color:var(--c-text-2)}
.faq-item.is-open .faq-a{display:block}

/* ---------- 相关推荐 ---------- */
.rec-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.rec-card{
  display:flex;gap:16px;align-items:flex-start;
  background:var(--c-surface);border:1px solid var(--c-line-soft);
  border-radius:var(--r-l);padding:16px;box-shadow:var(--sd-1);
  transition:transform var(--t),box-shadow var(--t);
}
.rec-card:hover{transform:translateY(-2px);box-shadow:var(--sd-2)}
.rec-card img{
  width:80px;height:80px;flex:none;border-radius:var(--r-s);
  object-fit:cover;background:var(--c-surface-2);
}
.rec-card h3{font-size:16px;margin-bottom:6px;transition:color var(--t)}
.rec-card:hover h3{color:var(--c-primary)}
.rec-card p{font-size:13px;line-height:1.75;color:var(--c-text-3)}
.tag-cloud{display:flex;flex-wrap:wrap;gap:10px;margin-top:34px}
.tag-cloud a{
  display:inline-flex;align-items:center;height:32px;padding:0 14px;
  border-radius:999px;background:var(--c-surface-2);
  font-size:13px;color:var(--c-text-2);
  transition:background var(--t),color var(--t);
}
.tag-cloud a:hover{background:var(--c-primary-soft);color:var(--c-primary)}

/* ---------- CTA 条 ---------- */
.cta-bar{
  display:flex;align-items:center;justify-content:space-between;
  gap:28px;flex-wrap:wrap;
  background:var(--c-primary-soft);
  border-radius:var(--r-xl);padding:36px 44px;
  box-shadow:var(--sd-1);
}
.cta-bar h2{font-size:22px;margin-bottom:8px}
.cta-bar p{font-size:14px;color:var(--c-text-2);max-width:520px}
.cta-actions{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.copy-tip{font-size:13px;color:#1F9D55;margin-top:10px;display:none}
.copy-tip.is-visible{display:block}

/* ---------- 页脚 ---------- */
.site-footer{
  margin-top:88px;background:var(--c-primary-deep);
  color:rgba(255,255,255,.72);padding-top:64px;
}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.site-footer .brand-mark{background:rgba(255,255,255,.12)}
.site-footer .brand-name{display:block;color:#fff;font-size:20px;font-weight:600}
.site-footer .brand-sub{display:block;color:rgba(255,255,255,.6);font-size:12px;letter-spacing:.08em}
.footer-grid p{font-size:14px;line-height:1.85;color:rgba(255,255,255,.7);max-width:320px}
.footer-col h3{font-size:15px;color:#fff;margin-bottom:16px}
.footer-col ul{display:grid;gap:10px}
.footer-col a{
  font-size:14px;color:rgba(255,255,255,.72);
  transition:color var(--t);
}
.footer-col a:hover{color:var(--c-accent);text-decoration:underline;text-underline-offset:4px}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;
  gap:16px;flex-wrap:wrap;
  margin-top:48px;padding:20px 0;
  border-top:1px solid rgba(255,255,255,.14);
  font-size:12px;color:rgba(255,255,255,.55);
}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .entry-grid{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:1023px){
  .section{padding:64px 0}
  .hero-panel{padding:36px 32px}
  .hero-panel h1{font-size:34px}
  .split{grid-template-columns:1fr;gap:32px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .search input{width:140px}
}
@media (max-width:767px){
  .container{padding:0 16px}
  .header-top{height:60px;gap:12px}
  .search,.tool-link{display:none}
  .nav-list{gap:8px;padding-right:48px}
  .nav-link{padding:0 10px;font-size:14px}
  .nav-fade{
    display:block;position:absolute;right:0;top:0;bottom:0;width:44px;
    pointer-events:none;
    background:linear-gradient(90deg,rgba(237,242,249,0),var(--c-surface-2));
  }
  .page-hero{padding:32px 0 40px;border-radius:var(--r-l)}
  .hero-panel{padding:28px 22px;border-radius:var(--r-l)}
  .hero-panel h1{font-size:30px}
  .hero-actions .btn{width:100%}
  .hero-meta{gap:20px}
  .section-head{margin-bottom:28px;align-items:flex-start;flex-direction:column;gap:12px}
  .section-title{font-size:24px}
  .entry-grid,.steps{grid-template-columns:1fr}
  .rec-grid{grid-template-columns:1fr}
  .split-body h2{font-size:24px}
  .cta-bar{padding:26px 22px}
  .cta-actions{width:100%}
  .cta-actions .btn{width:100%}
  .faq-q{font-size:15px;padding:12px 16px}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}
@media (max-width:559px){
  body{font-size:15.5px}
  .hero-panel h1{font-size:26px}
  .section{padding:56px 0}
  .section-title{font-size:22px}
  .entry-body{padding:18px}
  .cta-bar h2{font-size:19px}
}

/* roulang page: article */
:root{
  --c-primary:#1D5BD6;
  --c-primary-deep:#123A8C;
  --c-primary-soft:#E6EEFC;
  --c-accent:#FF7A2F;
  --c-accent-soft:#FFF1E7;
  --c-text:#0E1726;
  --c-text-2:#4A5A70;
  --c-text-3:#8593A6;
  --c-line:#DFE6F0;
  --c-line-soft:#EDF2F9;
  --c-bg:#F4F7FB;
  --c-surface:#FFFFFF;
  --c-surface-2:#EDF2F9;
  --r-s:8px; --r-m:12px; --r-l:16px; --r-xl:22px; --r-pill:999px;
  --sd-1:0 1px 2px rgba(15,32,66,.06),0 1px 3px rgba(15,32,66,.05);
  --sd-2:0 6px 20px rgba(15,32,66,.08);
  --sd-3:0 16px 40px rgba(15,32,66,.12);
  --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","HarmonyOS Sans SC","Noto Sans SC",system-ui,"Microsoft YaHei",sans-serif;
  font-size:16px;line-height:1.85;color:var(--c-text);
  background:var(--c-bg);font-variant-numeric:tabular-nums;
  -webkit-font-smoothing:antialiased;
}
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;}
h1,h2,h3,h4{margin:0;font-weight:600;line-height:1.35;color:var(--c-text);}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
svg{display:block;}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;border-radius:4px;}
.container{max-width:1200px;margin:0 auto;padding:0 24px;}

/* ============ 顶栏 ============ */
.site-header{position:sticky;top:0;z-index:60;background:var(--c-surface);border-bottom:1px solid var(--c-line);transition:box-shadow 180ms var(--ease);}
.site-header.is-scrolled{box-shadow:var(--sd-1);}
.header-top{display:flex;align-items:center;justify-content:space-between;gap:24px;height:68px;}
.brand{display:flex;align-items:center;gap:12px;flex:0 0 auto;}
.brand-mark{width:40px;height:40px;border-radius:var(--r-m);background:var(--c-primary);display:flex;align-items:center;justify-content:center;flex:0 0 auto;}
.brand-mark svg{width:24px;height:24px;}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-name{font-size:20px;font-weight:600;letter-spacing:.5px;color:var(--c-text);}
.brand-sub{font-size:12px;color:var(--c-text-3);letter-spacing:2px;}
.header-tools{display:flex;align-items:center;gap:18px;min-width:0;}
.search{display:flex;align-items:center;gap:8px;height:40px;padding:0 16px;border-radius:var(--r-pill);background:var(--c-surface-2);border:1px solid transparent;transition:all 180ms var(--ease);}
.search svg{width:16px;height:16px;stroke:var(--c-text-3);fill:none;stroke-width:2;flex:0 0 auto;}
.search input{border:0;background:transparent;outline:none;width:170px;font-size:14px;color:var(--c-text);min-width:0;}
.search input::placeholder{color:var(--c-text-3);}
.search:focus-within{background:var(--c-surface);border-color:var(--c-primary);box-shadow:0 0 0 3px rgba(29,91,214,.15);}
.tool-link{font-size:14px;color:var(--c-text-2);white-space:nowrap;transition:color 180ms var(--ease);}
.tool-link:hover{color:var(--c-primary);}
.site-nav{background:var(--c-surface-2);border-bottom:1px solid var(--c-line);}
.nav-inner{position:relative;display:flex;align-items:center;height:52px;overflow-x:auto;scrollbar-width:none;}
.nav-inner::-webkit-scrollbar{display:none;}
.nav-list{display:flex;align-items:center;gap:28px;white-space:nowrap;}
.nav-link{position:relative;display:inline-flex;align-items:center;height:52px;padding:0 6px;font-size:15px;color:var(--c-text-2);transition:color 180ms var(--ease);}
.nav-link::after{content:"";position:absolute;left:0;right:0;bottom:0;height:2px;border-radius:2px;background:transparent;transition:background 180ms var(--ease);}
.nav-link:hover{color:var(--c-primary);}
.nav-link:hover::after{background:var(--c-primary-soft);}
.nav-link.is-active{color:var(--c-primary);font-weight:600;}
.nav-link.is-active::after{background:var(--c-primary);}
.nav-fade{display:none;position:absolute;right:0;top:0;bottom:0;width:44px;background:linear-gradient(90deg,rgba(237,242,249,0),var(--c-surface-2));pointer-events:none;}

/* ============ 面包屑 ============ */
.crumb-bar{padding:22px 0 0;}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--c-text-3);}
.breadcrumb a{color:var(--c-text-3);transition:color 180ms var(--ease);}
.breadcrumb a:hover{color:var(--c-primary);}
.breadcrumb .sep{color:var(--c-line);}
.breadcrumb .current{color:var(--c-text-2);}

/* ============ 文章头部 ============ */
.article-hero{background:var(--c-surface);border:1px solid var(--c-line-soft);border-radius:var(--r-xl);box-shadow:var(--sd-1);padding:40px 48px 36px;margin-top:18px;}
.badge{display:inline-flex;align-items:center;gap:6px;height:26px;padding:0 12px;border-radius:var(--r-pill);font-size:12px;font-weight:600;background:rgba(29,91,214,.12);color:var(--c-primary);}
.badge-accent{background:var(--c-accent-soft);color:var(--c-accent);border:1px solid rgba(255,122,47,.35);}
.article-title{font-size:44px;line-height:1.3;margin-top:18px;letter-spacing:.2px;}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:20px;margin-top:22px;font-size:13px;color:var(--c-text-3);}
.meta-item{display:inline-flex;align-items:center;gap:6px;}
.meta-item svg{width:14px;height:14px;stroke:currentColor;fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;}

/* ============ 文章布局 ============ */
.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:32px;align-items:start;margin-top:28px;}
.article-main{min-width:0;}
.article-card{background:var(--c-surface);border-radius:var(--r-l);box-shadow:var(--sd-1);padding:48px 48px 40px;}
.article-inner{max-width:760px;margin:0 auto;}
.article-body{font-size:16px;line-height:1.95;color:var(--c-text-2);word-break:break-word;}
.article-body p{margin:0 0 1.2em;}
.article-body h2{font-size:30px;color:var(--c-text);margin:40px 0 16px;padding-left:16px;position:relative;line-height:1.4;}
.article-body h2::before{content:"";position:absolute;left:0;top:.16em;bottom:.16em;width:4px;border-radius:2px;background:var(--c-primary);}
.article-body h3{font-size:22px;color:var(--c-text);margin:32px 0 12px;}
.article-body h4{font-size:18px;color:var(--c-text);margin:24px 0 10px;}
.article-body ul{margin:0 0 1.2em;padding-left:0;}
.article-body ul li{position:relative;padding-left:20px;margin-bottom:10px;}
.article-body ul li::before{content:"";position:absolute;left:4px;top:.72em;width:6px;height:6px;border-radius:50%;background:var(--c-primary);}
.article-body ol{margin:0 0 1.2em;padding-left:1.4em;list-style:decimal;}
.article-body ol li{margin-bottom:10px;}
.article-body blockquote{margin:24px 0;padding:18px 22px;background:var(--c-surface-2);border-left:3px solid var(--c-accent);border-radius:var(--r-s);color:var(--c-text-2);}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body img{border-radius:var(--r-m);margin:24px 0 8px;width:100%;height:auto;background:var(--c-surface-2);}
.article-body figcaption{font-size:13px;color:var(--c-text-3);text-align:center;margin-bottom:24px;}
.article-body a{color:var(--c-primary);text-decoration:underline;text-underline-offset:3px;}
.article-body strong{color:var(--c-text);font-weight:600;}
.article-body table{width:100%;border-collapse:collapse;font-size:15px;margin:0 0 1.4em;background:var(--c-surface);}
.article-body th,.article-body td{padding:12px 14px;border-bottom:1px solid var(--c-line);text-align:left;}
.article-body th{background:var(--c-surface-2);color:var(--c-text);font-weight:600;}

.empty-card{border:1px dashed var(--c-line);border-radius:var(--r-l);padding:48px 24px;text-align:center;color:var(--c-text-3);}
.empty-card svg{width:44px;height:44px;margin:0 auto 16px;stroke:var(--c-text-3);fill:none;stroke-width:1.5;}
.empty-card p{font-size:16px;color:var(--c-text-2);margin-bottom:18px;}

/* 文章底部操作 */
.article-actions{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px;margin-top:40px;padding-top:24px;border-top:1px solid var(--c-line-soft);}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;align-items:center;}
.tag-chip{display:inline-flex;align-items:center;height:30px;padding:0 14px;border-radius:var(--r-pill);font-size:13px;background:var(--c-surface-2);color:var(--c-text-2);transition:all 180ms var(--ease);}
.tag-chip:hover{background:var(--c-primary-soft);color:var(--c-primary);}
.action-row{display:flex;flex-wrap:wrap;gap:10px;}

.post-nav{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:24px;}
.post-nav a{display:block;background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-l);padding:18px 20px;transition:all 180ms var(--ease);}
.post-nav a:hover{border-color:var(--c-primary);box-shadow:var(--sd-2);transform:translateY(-2px);}
.post-nav small{display:block;font-size:12px;color:var(--c-text-3);margin-bottom:6px;}
.post-nav span{display:block;font-size:15px;color:var(--c-text);font-weight:600;line-height:1.5;}
.post-nav .next{text-align:right;}

/* ============ 侧栏 ============ */
.article-side{position:sticky;top:140px;display:flex;flex-direction:column;gap:20px;}
.side-card{background:var(--c-surface);border-radius:var(--r-l);box-shadow:var(--sd-1);padding:24px;}
.side-title{display:flex;align-items:center;gap:10px;font-size:17px;margin-bottom:16px;}
.side-title::before{content:"";width:3px;height:16px;border-radius:2px;background:var(--c-primary);}
.toc-list li a{display:block;padding:9px 12px;border-radius:var(--r-s);font-size:14px;color:var(--c-text-2);border-left:2px solid transparent;transition:all 180ms var(--ease);}
.toc-list li a:hover{background:var(--c-primary-soft);color:var(--c-primary);border-left-color:var(--c-primary);}
.compact-item{display:flex;gap:12px;align-items:center;padding:12px 0;border-bottom:1px solid var(--c-line-soft);}
.compact-item:last-child{border-bottom:0;padding-bottom:0;}
.compact-thumb{width:80px;height:80px;flex:0 0 auto;border-radius:var(--r-s);object-fit:cover;background:var(--c-surface-2);}
.compact-info{min-width:0;}
.compact-info h3,.compact-info h4{font-size:15px;font-weight:500;line-height:1.55;color:var(--c-text);margin-bottom:6px;}
.compact-info h3 a:hover,.compact-info h4 a:hover{color:var(--c-primary);}
.compact-info time{font-size:12px;color:var(--c-text-3);}
.tag-cloud{display:flex;flex-wrap:wrap;gap:8px;}
.side-cta{background:var(--c-primary-deep);border-radius:var(--r-l);padding:24px;color:rgba(255,255,255,.78);box-shadow:var(--sd-2);}
.side-cta h3{color:#fff;font-size:17px;margin-bottom:10px;}
.side-cta p{font-size:14px;line-height:1.8;margin-bottom:16px;}

/* ============ 按钮 ============ */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:44px;padding:0 22px;border-radius:var(--r-m);border:1px solid transparent;font-size:15px;font-weight:600;cursor:pointer;transition:all 180ms var(--ease);white-space:nowrap;}
.btn svg{width:17px;height:17px;fill:none;stroke:currentColor;stroke-width:1.9;stroke-linecap:round;stroke-linejoin:round;}
.btn-primary{background:var(--c-primary);color:#fff;}
.btn-primary:hover{background:var(--c-primary-deep);transform:translateY(-1px);box-shadow:var(--sd-2);}
.btn-accent{background:var(--c-accent);color:#fff;}
.btn-accent:hover{background:#E8681F;transform:translateY(-1px);box-shadow:var(--sd-2);}
.btn-ghost{background:var(--c-surface);border-color:var(--c-line);color:var(--c-text);}
.btn-ghost:hover{background:var(--c-primary-soft);border-color:var(--c-primary);color:var(--c-primary);}
.btn-text{height:auto;padding:0;background:none;color:var(--c-primary);font-weight:600;}
.btn-text svg{transition:transform 180ms var(--ease);}
.btn-text:hover svg{transform:translateX(3px);}
.btn.is-on{background:var(--c-accent-soft);color:var(--c-accent);border-color:rgba(255,122,47,.5);}

/* ============ 板块 ============ */
.section{margin-top:88px;}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:28px;}
.section-head h2{font-size:30px;}
.section-head p{font-size:14px;color:var(--c-text-3);margin-top:8px;}

.related-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;}
.related-card{display:flex;gap:14px;align-items:center;background:var(--c-surface);border:1px solid var(--c-line-soft);border-radius:var(--r-l);padding:14px;box-shadow:var(--sd-1);transition:all 180ms var(--ease);}
.related-card:hover{transform:translateY(-4px);box-shadow:var(--sd-3);}
.related-card .compact-thumb{width:96px;height:96px;}
.related-card .compact-info small{display:block;font-size:12px;color:var(--c-text-3);margin-top:6px;}

/* ============ FAQ ============ */
.faq-list{display:flex;flex-direction:column;gap:12px;}
.faq-item{background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-m);overflow:hidden;transition:box-shadow 180ms var(--ease);}
.faq-item:hover{box-shadow:var(--sd-1);}
.faq-q{position:relative;width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;height:56px;padding:0 20px 0 22px;text-align:left;font-size:16px;font-weight:600;color:var(--c-text);}
.faq-q::before{content:"";position:absolute;left:0;top:12px;bottom:12px;width:3px;border-radius:2px;background:var(--c-primary);}
.faq-q .chev{width:18px;height:18px;stroke:var(--c-text-3);fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;transition:transform 200ms var(--ease);flex:0 0 auto;}
.faq-item.is-open .faq-q .chev{transform:rotate(90deg);}
.faq-a{max-height:0;overflow:hidden;transition:max-height 260ms var(--ease);}
.faq-a p{padding:0 22px 20px;font-size:15px;line-height:1.9;color:var(--c-text-2);}

/* ============ 结尾 CTA ============ */
.closing{margin-top:88px;padding:56px 0;background-image:linear-gradient(rgba(18,58,140,.9),rgba(18,58,140,.9)),url(/assets/images/backpic/back-2.webp);background-size:cover;background-position:center;}
.closing-card{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:24px;background:var(--c-surface);border-radius:var(--r-xl);box-shadow:var(--sd-2);padding:32px 36px;}
.closing-text h2{font-size:24px;margin-bottom:10px;}
.closing-text p{font-size:15px;color:var(--c-text-2);max-width:560px;}
.closing-actions{display:flex;flex-wrap:wrap;gap:12px;}

/* ============ 页脚 ============ */
.site-footer{background:var(--c-primary-deep);color:rgba(255,255,255,.8);margin-top:0;}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:32px;padding:56px 0 32px;}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:16px;}
.footer-brand .brand-mark{background:rgba(255,255,255,.12);}
.footer-brand .brand-name{color:#fff;font-size:20px;font-weight:600;}
.footer-brand .brand-sub{color:rgba(255,255,255,.55);font-size:12px;letter-spacing:2px;}
.footer-grid p{font-size:14px;line-height:1.85;color:rgba(255,255,255,.7);max-width:320px;}
.footer-col h3{font-size:15px;color:#fff;margin-bottom:16px;}
.footer-col li{margin-bottom:10px;}
.footer-col a{font-size:14px;color:rgba(255,255,255,.72);transition:color 180ms var(--ease);}
.footer-col a:hover{color:var(--c-accent);text-decoration:underline;text-underline-offset:3px;}
.footer-bottom{display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;padding:20px 0;border-top:1px solid rgba(255,255,255,.14);font-size:12px;color:rgba(255,255,255,.55);}

/* ============ 响应式 ============ */
@media (max-width:1279px){
  .article-layout{grid-template-columns:minmax(0,1fr) 290px;gap:24px;}
  .article-card{padding:40px 36px 32px;}
  .article-title{font-size:38px;}
}
@media (max-width:1023px){
  .article-layout{grid-template-columns:1fr;}
  .article-side{position:static;}
  .article-hero{padding:32px 28px;}
  .article-title{font-size:34px;}
  .search input{width:130px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
}
@media (max-width:767px){
  .container{padding:0 16px;}
  .header-top{height:60px;gap:12px;}
  .brand-name{font-size:18px;}
  .brand-sub{letter-spacing:1px;}
  .tool-link{display:none;}
  .search{height:36px;padding:0 12px;}
  .search input{width:110px;font-size:13px;}
  .nav-list{gap:20px;}
  .nav-link{height:48px;font-size:14px;}
  .nav-inner{height:48px;}
  .nav-fade{display:block;}
  .article-hero{padding:26px 20px;border-radius:var(--r-l);}
  .article-title{font-size:30px;margin-top:14px;}
  .article-meta{gap:14px;font-size:12px;}
  .article-card{padding:24px 20px;border-radius:var(--r-m);}
  .article-body h2{font-size:24px;margin:32px 0 14px;}
  .article-body h3{font-size:19px;margin:26px 0 10px;}
  .section{margin-top:56px;}
  .section-head h2{font-size:24px;}
  .related-grid{grid-template-columns:1fr;}
  .post-nav{grid-template-columns:1fr;}
  .post-nav .next{text-align:left;}
  .closing{padding:40px 0;}
  .closing-card{padding:24px 20px;border-radius:var(--r-l);}
  .footer-grid{grid-template-columns:1fr;padding:40px 0 24px;}
  .footer-grid p{max-width:none;}
}
@media (max-width:559px){
  body{font-size:15.5px;}
  .article-title{font-size:26px;}
  .article-actions{flex-direction:column;align-items:stretch;}
  .action-row{width:100%;}
  .action-row .btn{flex:1 1 auto;width:100%;}
  .closing-actions{width:100%;}
  .closing-actions .btn{width:100%;}
  .search input{width:88px;}
}

/* roulang page: category3 */
:root{
  --c-primary:#1D5BD6;
  --c-primary-deep:#123A8C;
  --c-primary-soft:#E6EEFC;
  --c-accent:#FF7A2F;
  --c-accent-soft:#FFF1E7;
  --c-ch:#E2621B;
  --c-ch-soft:rgba(226,98,27,.12);
  --c-text:#0E1726;
  --c-text-2:#4A5A70;
  --c-text-3:#8593A6;
  --c-line:#DFE6F0;
  --c-line-soft:#EDF2F9;
  --c-bg:#F4F7FB;
  --c-surface:#FFFFFF;
  --c-surface-2:#EDF2F9;
  --r-s:8px;--r-m:12px;--r-l:16px;--r-xl:22px;
  --sd-1:0 1px 2px rgba(15,32,66,.06),0 1px 3px rgba(15,32,66,.05);
  --sd-2:0 6px 20px rgba(15,32,66,.08);
  --sd-3:0 16px 40px rgba(15,32,66,.12);
  --ease:cubic-bezier(.2,.7,.3,1);
  --t:180ms var(--ease);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--c-bg);
  color:var(--c-text);
  font-family:"PingFang SC","HarmonyOS Sans SC","Noto Sans SC",system-ui,"Microsoft YaHei",sans-serif;
  font-size:16px;
  line-height:1.85;
  font-weight:400;
  font-variant-numeric:tabular-nums;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;border-radius:4px;}
.container{max-width:1200px;margin:0 auto;padding:0 24px;}

/* ---------- header ---------- */
.site-header{background:var(--c-surface);border-bottom:1px solid var(--c-line);position:sticky;top:0;z-index:60;transition:box-shadow var(--t);}
.site-header.is-scrolled{box-shadow:var(--sd-1);}
.header-top{display:flex;align-items:center;justify-content:space-between;gap:24px;height:68px;}
.brand{display:flex;align-items:center;gap:12px;}
.brand-mark{width:38px;height:38px;border-radius:var(--r-m);background:var(--c-primary);display:inline-flex;align-items:center;justify-content:center;flex:0 0 auto;box-shadow:var(--sd-1);}
.brand-mark svg{width:22px;height:22px;}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-name{font-size:20px;font-weight:600;color:var(--c-primary-deep);letter-spacing:.2px;}
.brand-sub{font-size:12px;color:var(--c-text-3);letter-spacing:1px;}
.header-tools{display:flex;align-items:center;gap:16px;}
.search{display:flex;align-items:center;gap:8px;background:var(--c-surface-2);border:1px solid transparent;border-radius:999px;padding:0 16px;height:40px;min-width:240px;transition:background var(--t),border-color var(--t),box-shadow var(--t);}
.search svg{width:16px;height:16px;stroke:var(--c-text-3);fill:none;flex:0 0 auto;}
.search input{border:0;background:transparent;outline:none;font-size:14px;width:100%;color:var(--c-text);}
.search input::placeholder{color:var(--c-text-3);}
.search:focus-within{background:var(--c-surface);border-color:var(--c-primary);box-shadow:0 0 0 3px rgba(29,91,214,.15);}
.tool-link{font-size:14px;color:var(--c-text-2);transition:color var(--t);white-space:nowrap;}
.tool-link:hover{color:var(--c-primary);}
.site-nav{background:var(--c-surface-2);border-top:1px solid var(--c-line-soft);}
.nav-inner{position:relative;display:flex;align-items:center;height:52px;overflow:hidden;}
.nav-list{display:flex;align-items:center;gap:28px;overflow-x:auto;scrollbar-width:none;-ms-overflow-style:none;}
.nav-list::-webkit-scrollbar{display:none;}
.nav-link{position:relative;display:inline-flex;align-items:center;height:52px;font-size:15px;color:var(--c-text-2);padding:0 12px;border-radius:var(--r-s);transition:color var(--t),background var(--t);white-space:nowrap;}
.nav-link:hover{color:var(--c-primary);background:var(--c-primary-soft);}
.nav-link.is-active{color:var(--c-primary);font-weight:600;}
.nav-link.is-active::after{content:"";position:absolute;left:12px;right:12px;bottom:6px;height:2px;border-radius:2px;background:var(--c-ch);}
.nav-fade{position:absolute;right:0;top:0;bottom:0;width:48px;background:linear-gradient(90deg,rgba(237,242,249,0),var(--c-surface-2));pointer-events:none;}

/* ---------- 面包屑 ---------- */
.page-main{padding:32px 0 0;}
.crumb{font-size:13px;color:var(--c-text-3);margin-bottom:20px;display:flex;flex-wrap:wrap;gap:6px;align-items:center;}
.crumb a{color:var(--c-text-2);}
.crumb a:hover{color:var(--c-primary);}
.crumb .sep{color:var(--c-text-3);}
.crumb .current{color:var(--c-text-2);}

/* ---------- hero ---------- */
.page-hero{
  position:relative;border-radius:var(--r-xl);overflow:hidden;min-height:400px;
  display:flex;align-items:center;padding:40px;
  background:var(--c-primary-deep) url("/assets/images/backpic/back-2.webp") center/cover no-repeat;
  box-shadow:var(--sd-2);
}
.page-hero::after{content:"";position:absolute;inset:0;background:linear-gradient(100deg,rgba(18,58,140,.92) 0%,rgba(18,58,140,.68) 46%,rgba(18,58,140,.24) 100%);}
.hero-panel{position:relative;z-index:2;background:var(--c-surface);border-radius:var(--r-xl);box-shadow:var(--sd-2);padding:36px;max-width:660px;}
.hero-tag{display:inline-flex;align-items:center;gap:6px;background:var(--c-ch-soft);color:var(--c-ch);font-size:12px;font-weight:600;padding:5px 12px;border-radius:999px;letter-spacing:.4px;}
.hero-title{font-size:44px;line-height:1.28;font-weight:600;color:var(--c-text);margin-top:16px;letter-spacing:-.2px;}
.hero-title::after{content:"";display:block;width:48px;height:4px;border-radius:2px;background:var(--c-ch);margin-top:18px;}
.hero-desc{margin-top:16px;font-size:16px;color:var(--c-text-2);max-width:520px;}
.hero-actions{margin-top:26px;display:flex;flex-wrap:wrap;gap:12px;}

/* ---------- 按钮 ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:44px;padding:0 22px;border-radius:var(--r-m);font-size:15px;font-weight:500;transition:background var(--t),color var(--t),border-color var(--t),transform var(--t),box-shadow var(--t);}
.btn-primary{background:var(--c-primary);color:#fff;box-shadow:var(--sd-1);}
.btn-primary:hover{background:var(--c-primary-deep);transform:translateY(-1px);}
.btn-accent{background:var(--c-accent);color:#fff;box-shadow:var(--sd-1);}
.btn-accent:hover{background:#EA6920;transform:translateY(-1px);}
.btn-ghost{background:var(--c-surface);color:var(--c-text);border:1px solid var(--c-line);}
.btn-ghost:hover{background:var(--c-primary-soft);border-color:var(--c-primary);color:var(--c-primary);}
.btn-text{display:inline-flex;align-items:center;gap:6px;color:var(--c-primary);font-size:14px;font-weight:500;}
.btn-text svg{width:16px;height:16px;stroke:currentColor;fill:none;stroke-width:2;transition:transform var(--t);}
.btn-text:hover svg{transform:translateX(3px);}
.btn:active{transform:translateY(0);}

/* ---------- 板块 ---------- */
.section{padding:88px 0 0;}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:32px;}
.section-title{font-size:30px;font-weight:600;color:var(--c-text);line-height:1.35;}
.section-sub{margin-top:8px;font-size:15px;color:var(--c-text-2);max-width:660px;}
.section-more{flex:0 0 auto;}

/* ---------- 封面卡网格 ---------- */
.cover-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:28px;}
.cover-card{background:var(--c-surface);border-radius:var(--r-l);border:1px solid var(--c-line-soft);box-shadow:var(--sd-1);overflow:hidden;transition:transform var(--t),box-shadow var(--t);}
.cover-card:hover{transform:translateY(-4px);box-shadow:var(--sd-3);}
.cover-grid .cover-card:nth-child(even){margin-top:32px;}
.cover-media{position:relative;aspect-ratio:3/2;background:var(--c-surface-2);}
.cover-media img{width:100%;height:100%;object-fit:cover;}
.cover-media .badge{position:absolute;left:14px;top:14px;}
.badge{display:inline-flex;align-items:center;font-size:12px;font-weight:600;padding:4px 10px;border-radius:999px;letter-spacing:.3px;}
.badge-ch{background:var(--c-ch-soft);color:var(--c-ch);}
.badge-primary{background:var(--c-primary-soft);color:var(--c-primary);}
.badge-accent{background:var(--c-accent-soft);color:#D9601C;border:1px solid rgba(255,122,47,.45);}
.cover-body{padding:22px 24px 24px;}
.cover-title{font-size:20px;font-weight:600;line-height:1.45;}
.cover-card:hover .cover-title{color:var(--c-primary);}
.cover-text{margin-top:8px;font-size:14px;color:var(--c-text-2);}
.cover-meta{margin-top:16px;display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:13px;color:var(--c-text-3);}

/* ---------- 目录条目 ---------- */
.toc-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;}
.toc-item{display:flex;align-items:center;gap:16px;background:var(--c-surface);border:1px solid var(--c-line-soft);border-radius:var(--r-l);padding:18px 22px;box-shadow:var(--sd-1);transition:transform var(--t),box-shadow var(--t),border-color var(--t);}
.toc-item:hover{transform:translateY(-3px);box-shadow:var(--sd-2);border-color:var(--c-line);}
.toc-num{flex:0 0 auto;width:40px;height:40px;border-radius:var(--r-m);background:var(--c-ch-soft);color:var(--c-ch);font-size:14px;font-weight:600;display:inline-flex;align-items:center;justify-content:center;}
.toc-main{flex:1 1 auto;min-width:0;}
.toc-title{font-size:17px;font-weight:600;color:var(--c-text);}
.toc-item:hover .toc-title{color:var(--c-primary);}
.toc-note{margin-top:2px;font-size:13px;color:var(--c-text-3);}
.toc-arrow{flex:0 0 auto;width:18px;height:18px;stroke:var(--c-text-3);fill:none;stroke-width:2;transition:transform var(--t),stroke var(--t);}
.toc-item:hover .toc-arrow{transform:translateX(3px);stroke:var(--c-ch);}

/* ---------- 错位说明条 ---------- */
.strip-wrap{display:grid;grid-template-columns:minmax(0,320px) 1fr;gap:48px;align-items:start;background:var(--c-surface);border-radius:var(--r-xl);padding:40px;box-shadow:var(--sd-1);border:1px solid var(--c-line-soft);}
.strip-aside h2{font-size:30px;font-weight:600;line-height:1.35;}
.strip-aside p{margin-top:12px;font-size:15px;color:var(--c-text-2);}
.strip-list{display:flex;flex-direction:column;gap:16px;}
.strip-item{display:flex;gap:16px;padding:20px;border-radius:var(--r-l);background:var(--c-surface-2);transition:background var(--t);}
.strip-item:hover{background:var(--c-primary-soft);}
.strip-icon{flex:0 0 auto;width:44px;height:44px;border-radius:var(--r-m);background:var(--c-surface);display:inline-flex;align-items:center;justify-content:center;box-shadow:var(--sd-1);}
.strip-icon svg{width:22px;height:22px;stroke:var(--c-ch);fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;}
.strip-item h3{font-size:17px;font-weight:600;}
.strip-item p{margin-top:4px;font-size:14px;color:var(--c-text-2);}

/* ---------- 相关推荐 ---------- */
.rec-wrap{display:grid;grid-template-columns:1fr;gap:32px;}
.rec-list{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;}
.rec-item{display:flex;gap:16px;align-items:center;background:var(--c-surface);border:1px solid var(--c-line-soft);border-radius:var(--r-l);padding:14px;box-shadow:var(--sd-1);transition:transform var(--t),box-shadow var(--t);}
.rec-item:hover{transform:translateY(-3px);box-shadow:var(--sd-2);}
.rec-thumb{flex:0 0 auto;width:80px;height:80px;border-radius:var(--r-m);overflow:hidden;background:var(--c-surface-2);}
.rec-thumb img{width:100%;height:100%;object-fit:cover;}
.rec-body{min-width:0;}
.rec-title{font-size:16px;font-weight:600;line-height:1.5;}
.rec-item:hover .rec-title{color:var(--c-primary);}
.rec-time{margin-top:4px;font-size:13px;color:var(--c-text-3);display:flex;align-items:center;gap:6px;}
.rec-time svg{width:14px;height:14px;stroke:var(--c-text-3);fill:none;stroke-width:1.8;}
.tag-cloud{display:flex;flex-wrap:wrap;gap:10px;align-items:center;padding-top:8px;border-top:1px dashed var(--c-line);}
.tag{display:inline-flex;align-items:center;font-size:13px;padding:6px 14px;border-radius:999px;background:var(--c-surface);border:1px solid var(--c-line);color:var(--c-text-2);transition:background var(--t),color var(--t),border-color var(--t);}
.tag:hover{background:var(--c-ch-soft);color:var(--c-ch);border-color:rgba(226,98,27,.35);}

/* ---------- FAQ ---------- */
.faq-list{display:flex;flex-direction:column;gap:14px;max-width:880px;}
.faq-item{background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-m);overflow:hidden;transition:box-shadow var(--t),border-color var(--t);}
.faq-item.is-open{box-shadow:var(--sd-2);border-color:rgba(226,98,27,.4);}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;text-align:left;min-height:56px;padding:0 22px;font-size:16px;font-weight:600;position:relative;transition:color var(--t),background var(--t);}
.faq-q::before{content:"";position:absolute;left:0;top:12px;bottom:12px;width:3px;border-radius:0 3px 3px 0;background:var(--c-ch);}
.faq-q:hover{color:var(--c-primary);background:var(--c-line-soft);}
.faq-q svg{flex:0 0 auto;width:18px;height:18px;stroke:var(--c-text-3);fill:none;stroke-width:2;transition:transform var(--t),stroke var(--t);}
.faq-item.is-open .faq-q svg{transform:rotate(90deg);stroke:var(--c-ch);}
.faq-a{padding:0 22px 20px;font-size:15px;line-height:1.9;color:var(--c-text-2);}

/* ---------- CTA ---------- */
.cta-bar{display:flex;align-items:center;justify-content:space-between;gap:28px;background:var(--c-primary-soft);border-radius:var(--r-xl);padding:32px 36px;box-shadow:var(--sd-1);}
.cta-text h2{font-size:24px;font-weight:600;line-height:1.4;}
.cta-text p{margin-top:6px;font-size:14px;color:var(--c-text-2);}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;flex:0 0 auto;}

/* ---------- footer ---------- */
.site-footer{background:var(--c-primary-deep);color:rgba(255,255,255,.78);margin-top:88px;padding:56px 0 0;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:16px;}
.footer-brand .brand-mark{background:rgba(255,255,255,.12);}
.site-footer .brand-name{color:#fff;}
.site-footer .brand-sub{color:rgba(255,255,255,.55);}
.site-footer p{font-size:14px;line-height:1.8;color:rgba(255,255,255,.7);}
.footer-col h3{font-size:15px;font-weight:600;color:#fff;margin-bottom:16px;}
.footer-col ul{display:flex;flex-direction:column;gap:10px;}
.footer-col a{font-size:14px;color:rgba(255,255,255,.72);transition:color var(--t);}
.footer-col a:hover{color:var(--c-accent);text-decoration:underline;text-underline-offset:3px;}
.footer-bottom{margin-top:44px;border-top:1px solid rgba(255,255,255,.14);padding:20px 0 28px;display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;font-size:12px;color:rgba(255,255,255,.55);}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .hero-title{font-size:38px;}
}
@media (max-width:1023px){
  .container{padding:0 24px;}
  .header-tools .tool-link{display:none;}
  .search{min-width:180px;}
  .section{padding:64px 0 0;}
  .section-title{font-size:26px;}
  .strip-wrap{grid-template-columns:1fr;gap:28px;padding:30px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .cta-bar{flex-direction:column;align-items:flex-start;}
}
@media (max-width:767px){
  .header-top{height:60px;gap:12px;}
  .search{min-width:0;flex:1 1 auto;}
  .nav-list{gap:20px;}
  .page-main{padding:20px 0 0;}
  .page-hero{min-height:0;padding:20px;border-radius:var(--r-l);}
  .hero-panel{padding:24px;border-radius:var(--r-l);}
  .hero-title{font-size:30px;}
  .hero-desc{font-size:15px;}
  .section{padding:56px 0 0;}
  .section-title{font-size:24px;}
  .cover-grid{grid-template-columns:1fr;gap:20px;}
  .cover-grid .cover-card:nth-child(even){margin-top:0;}
  .toc-grid{grid-template-columns:1fr;}
  .rec-list{grid-template-columns:1fr;}
  .cta-bar{padding:24px;}
  .cta-actions{width:100%;}
  .cta-actions .btn{width:100%;}
  .site-footer{margin-top:56px;padding-top:40px;}
}
@media (max-width:559px){
  .container{padding:0 16px;}
  .brand-name{font-size:18px;}
  .brand-sub{font-size:11px;}
  .hero-title{font-size:26px;}
  .hero-actions .btn{width:100%;}
  .section-title{font-size:22px;}
  .section-head{flex-direction:column;align-items:flex-start;gap:12px;}
  .strip-wrap{padding:22px;}
  .footer-grid{grid-template-columns:1fr;}
  .toc-item{padding:16px;}
  .badge{font-size:12px;}
}

/* roulang page: category2 */
:root{
  --c-primary:#1D5BD6;
  --c-primary-deep:#123A8C;
  --c-primary-soft:#E6EEFC;
  --c-accent:#FF7A2F;
  --c-accent-soft:#FFF1E7;
  --ch:#0E9F9F;
  --ch-soft:rgba(14,159,159,.12);
  --c-text:#0E1726;
  --c-text-2:#4A5A70;
  --c-text-3:#8593A6;
  --c-line:#DFE6F0;
  --c-line-soft:#EDF2F9;
  --c-bg:#F4F7FB;
  --c-surface:#FFFFFF;
  --c-surface-2:#EDF2F9;
  --r-s:8px;
  --r-m:12px;
  --r-l:16px;
  --r-xl:22px;
  --r-pill:999px;
  --sd-1:0 1px 2px rgba(15,32,66,.06),0 1px 3px rgba(15,32,66,.05);
  --sd-2:0 6px 20px rgba(15,32,66,.08);
  --sd-3:0 16px 40px rgba(15,32,66,.12);
  --ease:cubic-bezier(.2,.7,.3,1);
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans SC","Noto Sans SC",system-ui,"Microsoft YaHei",sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--c-text);
  background:var(--c-bg);
  font-variant-numeric:tabular-nums;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{margin:0;font-weight:600;line-height:1.35;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
a{color:inherit;text-decoration:none;}
img{display:block;max-width:100%;height:auto;}
button{font:inherit;color:inherit;border:none;background:none;cursor:pointer;}
input{font:inherit;}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px;}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:var(--c-surface);
  border-bottom:1px solid var(--c-line);
  transition:box-shadow 180ms var(--ease);
}
.site-header.is-scrolled{box-shadow:var(--sd-1);}
.header-top{display:flex;align-items:center;justify-content:space-between;gap:24px;height:68px;}
.brand{display:inline-flex;align-items:center;gap:10px;}
.brand-mark{
  width:38px;height:38px;border-radius:var(--r-m);
  background:var(--c-primary);
  display:inline-flex;align-items:center;justify-content:center;
  flex:0 0 auto;box-shadow:var(--sd-1);
}
.brand-mark svg{width:22px;height:22px;}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-name{font-size:20px;font-weight:600;letter-spacing:.2px;color:var(--c-text);}
.brand-sub{font-size:12px;color:var(--c-text-3);letter-spacing:2px;}
.header-tools{display:flex;align-items:center;gap:18px;}
.search{
  display:flex;align-items:center;gap:8px;
  height:40px;padding:0 16px;
  background:var(--c-surface-2);
  border:1px solid transparent;border-radius:var(--r-pill);
  transition:all 180ms var(--ease);
}
.search:focus-within{background:#fff;border-color:var(--c-primary);box-shadow:0 0 0 3px rgba(29,91,214,.15);}
.search svg{width:16px;height:16px;stroke:var(--c-text-3);fill:none;flex:0 0 auto;}
.search input{
  border:none;background:transparent;outline:none;
  width:190px;font-size:14px;color:var(--c-text);
}
.search input::placeholder{color:var(--c-text-3);}
.tool-link{font-size:14px;color:var(--c-text-2);transition:color 180ms var(--ease);}
.tool-link:hover{color:var(--c-primary);}
.site-nav{background:var(--c-surface);border-top:1px solid var(--c-line-soft);}
.nav-inner{position:relative;}
.nav-list{display:flex;align-items:center;gap:28px;height:52px;}
.nav-link{
  position:relative;display:inline-flex;align-items:center;
  height:52px;padding:0 10px;border-radius:var(--r-s);
  font-size:15px;color:var(--c-text-2);
  transition:color 180ms var(--ease),background 180ms var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:10px;right:10px;bottom:6px;height:2px;
  background:var(--c-primary);border-radius:2px;
  transform:scaleX(0);transform-origin:left;transition:transform 180ms var(--ease);
}
.nav-link:hover{color:var(--c-primary-deep);background:var(--c-primary-soft);}
.nav-link.is-active{color:var(--c-primary);font-weight:600;}
.nav-link.is-active::after{transform:scaleX(1);}
.nav-fade{display:none;}

/* ---------- breadcrumb ---------- */
.breadcrumb{padding:20px 0 0;font-size:13px;color:var(--c-text-3);}
.breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;}
.breadcrumb li{display:inline-flex;align-items:center;gap:8px;}
.breadcrumb li+li::before{content:"/";color:var(--c-line);}
.breadcrumb a{color:var(--c-text-3);transition:color 180ms var(--ease);}
.breadcrumb a:hover{color:var(--c-primary);}
.breadcrumb [aria-current="page"]{color:var(--c-text-2);}

/* ---------- hero ---------- */
.page-hero{
  position:relative;
  margin-top:20px;
  padding:56px 0 64px;
  background-image:url('/assets/images/backpic/back-2.webp');
  background-size:cover;
  background-position:center;
  background-color:var(--c-primary-deep);
}
.page-hero::before{content:"";position:absolute;inset:0;background:rgba(18,58,140,.52);}
.hero-panel{
  position:relative;
  display:grid;grid-template-columns:1.1fr .9fr;gap:40px;align-items:center;
  background:var(--c-surface);
  border-radius:var(--r-xl);
  box-shadow:var(--sd-2);
  padding:44px;
}
.ch-badge{
  display:inline-flex;align-items:center;gap:8px;
  padding:5px 14px;border-radius:var(--r-pill);
  background:var(--ch-soft);color:var(--ch);
  font-size:12px;font-weight:600;letter-spacing:.5px;
}
.ch-badge::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--ch);}
.hero-copy h1{
  margin:18px 0 0;font-size:44px;line-height:1.28;letter-spacing:-.5px;
  color:var(--c-text);
}
.hero-copy h1::after{
  content:"";display:block;width:96px;height:4px;border-radius:2px;
  background:var(--ch);margin-top:20px;
}
.hero-lead{margin-top:20px;font-size:17px;color:var(--c-text-2);max-width:520px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px;}
.hero-figure{margin:0;border-radius:var(--r-l);overflow:hidden;box-shadow:var(--sd-1);}
.hero-figure img{width:100%;height:280px;object-fit:cover;background:var(--c-surface-2);}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 22px;border-radius:var(--r-m);
  font-size:15px;font-weight:600;border:1px solid transparent;
  transition:all 180ms var(--ease);white-space:nowrap;
}
.btn-primary{background:var(--c-primary);color:#fff;}
.btn-primary:hover{background:var(--c-primary-deep);transform:translateY(-1px);box-shadow:var(--sd-2);}
.btn-accent{background:var(--c-accent);color:#fff;}
.btn-accent:hover{background:#e8681f;transform:translateY(-1px);box-shadow:var(--sd-2);}
.btn-ghost{background:#fff;border-color:var(--c-line);color:var(--c-text);}
.btn-ghost:hover{background:var(--c-primary-soft);border-color:var(--c-primary);color:var(--c-primary-deep);}
.btn-text{height:auto;padding:0;background:none;color:var(--c-primary);font-weight:600;}
.btn-text svg{width:16px;height:16px;stroke:currentColor;fill:none;transition:transform 180ms var(--ease);}
.btn-text:hover svg{transform:translateX(3px);}

/* ---------- sections ---------- */
.section{padding:72px 0;}
.section-alt{background:var(--c-surface);border-top:1px solid var(--c-line-soft);border-bottom:1px solid var(--c-line-soft);}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:32px;}
.section-head h2{font-size:30px;letter-spacing:-.3px;}
.section-head p{margin-top:10px;font-size:15px;color:var(--c-text-2);max-width:640px;}
.eyebrow{
  display:inline-block;font-size:12px;font-weight:600;letter-spacing:1.5px;
  color:var(--ch);margin-bottom:10px;
}

/* ---------- filter + timeline ---------- */
.filter-bar{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:28px;}
.chip{
  display:inline-flex;align-items:center;height:36px;padding:0 16px;
  border-radius:var(--r-pill);border:1px solid var(--c-line);
  background:#fff;color:var(--c-text-2);font-size:14px;
  transition:all 180ms var(--ease);cursor:pointer;
}
.chip:hover{border-color:var(--ch);color:var(--ch);background:var(--ch-soft);}
.chip.is-active{background:var(--ch);border-color:var(--ch);color:#fff;font-weight:600;}

.timeline{position:relative;padding-left:0;}
.timeline li{
  position:relative;display:flex;gap:24px;align-items:flex-start;
  padding:24px 0 24px 0;
}
.timeline li+li{border-top:1px dashed var(--c-line);}
.timeline li::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:3px;
  background:var(--ch-soft);border-radius:3px;
}
.time-block{
  flex:0 0 116px;position:relative;z-index:1;
  padding-left:20px;
  font-size:26px;font-weight:600;color:var(--ch);letter-spacing:-.5px;
  line-height:1.2;
}
.time-block small{display:block;font-size:12px;font-weight:400;color:var(--c-text-3);letter-spacing:0;margin-top:4px;}
.time-body{flex:1;min-width:0;}
.time-body h3{font-size:17px;margin-bottom:6px;}
.time-body p{font-size:15px;color:var(--c-text-2);}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px;}
.tag{
  display:inline-flex;align-items:center;height:26px;padding:0 10px;
  border-radius:var(--r-pill);font-size:12px;
  background:var(--ch-soft);color:var(--ch);
}
.tag-plain{background:var(--c-surface-2);color:var(--c-text-3);}

/* ---------- dimension cards ---------- */
.dim-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.dim-card{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-l);
  overflow:hidden;box-shadow:var(--sd-1);
  transition:transform 180ms var(--ease),box-shadow 180ms var(--ease);
  display:flex;flex-direction:column;
}
.dim-card:hover{transform:translateY(-4px);box-shadow:var(--sd-3);}
.dim-card figure{margin:0;}
.dim-card img{width:100%;height:180px;object-fit:cover;background:var(--c-surface-2);}
.dim-body{padding:20px 22px 24px;}
.dim-body h3{font-size:17px;margin-bottom:8px;}
.dim-body p{font-size:15px;color:var(--c-text-2);}
.dim-body .btn-text{margin-top:14px;}

/* ---------- advantage ---------- */
.adv-layout{display:grid;grid-template-columns:.85fr 1.15fr;gap:48px;align-items:start;}
.adv-layout h2{font-size:30px;letter-spacing:-.3px;}
.adv-layout .adv-note{margin-top:16px;font-size:15px;color:var(--c-text-2);}
.adv-list{display:flex;flex-direction:column;gap:16px;}
.adv-item{
  display:flex;gap:16px;align-items:flex-start;
  background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:var(--r-l);padding:22px 24px;box-shadow:var(--sd-1);
  transition:transform 180ms var(--ease),box-shadow 180ms var(--ease),border-color 180ms var(--ease);
}
.adv-item:hover{transform:translateY(-3px);box-shadow:var(--sd-2);border-color:var(--ch);}
.adv-icon{
  flex:0 0 auto;width:44px;height:44px;border-radius:var(--r-m);
  background:var(--c-primary-soft);display:flex;align-items:center;justify-content:center;
}
.adv-icon svg{width:22px;height:22px;stroke:var(--c-primary);fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;}
.adv-item h3{font-size:17px;margin-bottom:6px;}
.adv-item p{font-size:15px;color:var(--c-text-2);}
.adv-metric{font-size:22px;font-weight:600;color:var(--c-primary-deep);}

/* ---------- recommend ---------- */
.rec-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;}
.rec-item{
  display:flex;align-items:center;gap:16px;
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-l);
  padding:16px 20px;transition:all 180ms var(--ease);
}
.rec-item:hover{border-color:var(--c-primary);box-shadow:var(--sd-2);transform:translateY(-3px);}
.rec-item img{
  width:80px;height:80px;flex:0 0 80px;border-radius:var(--r-m);
  object-fit:cover;background:var(--c-surface-2);
}
.rec-text{min-width:0;}
.rec-text h3{font-size:16px;transition:color 180ms var(--ease);}
.rec-item:hover .rec-text h3{color:var(--c-primary);}
.rec-text p{font-size:14px;color:var(--c-text-3);margin-top:4px;}
.tag-cloud{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px;}
.tag-cloud a{
  display:inline-flex;align-items:center;height:32px;padding:0 14px;
  border-radius:var(--r-pill);background:var(--c-surface-2);
  font-size:13px;color:var(--c-text-2);transition:all 180ms var(--ease);
}
.tag-cloud a:hover{background:var(--c-primary-soft);color:var(--c-primary-deep);}

/* ---------- CTA ---------- */
.cta-bar{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:24px;
  background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:var(--r-xl);padding:32px 36px;box-shadow:var(--sd-2);
}
.cta-bar h2{font-size:22px;}
.cta-bar p{font-size:15px;color:var(--c-text-2);margin-top:8px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;}

/* ---------- FAQ ---------- */
.faq-list{display:flex;flex-direction:column;gap:12px;max-width:900px;}
.faq-item{
  background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:var(--r-m);overflow:hidden;position:relative;
  transition:border-color 180ms var(--ease),box-shadow 180ms var(--ease);
}
.faq-item::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--ch);
}
.faq-item:hover{border-color:var(--ch);box-shadow:var(--sd-1);}
.faq-q{
  width:100%;min-height:56px;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:0 24px 0 28px;text-align:left;font-size:16px;font-weight:600;color:var(--c-text);
}
.faq-q svg{width:18px;height:18px;stroke:var(--c-text-3);fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;transition:transform 180ms var(--ease);flex:0 0 auto;}
.faq-item.is-open .faq-q svg{transform:rotate(90deg);stroke:var(--ch);}
.faq-a{max-height:0;overflow:hidden;transition:max-height 260ms var(--ease);}
.faq-item.is-open .faq-a{max-height:480px;}
.faq-a p{padding:0 28px 20px;font-size:15px;line-height:1.9;color:var(--c-text-2);}

/* ---------- footer ---------- */
.site-footer{background:var(--c-primary-deep);color:#fff;margin-top:8px;}
.footer-grid{
  display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:32px;
  padding:56px 0 40px;
}
.footer-brand{display:inline-flex;align-items:center;gap:10px;margin-bottom:14px;}
.footer-brand .brand-name{color:#fff;font-size:18px;}
.footer-brand .brand-sub{color:rgba(255,255,255,.6);}
.site-footer p{font-size:14px;color:rgba(255,255,255,.7);max-width:280px;}
.footer-col h3{font-size:15px;color:#fff;margin-bottom:16px;}
.footer-col ul{display:flex;flex-direction:column;gap:10px;}
.footer-col a{
  font-size:14px;color:rgba(255,255,255,.72);
  transition:color 180ms var(--ease);
}
.footer-col a:hover{color:var(--c-accent);text-decoration:underline;text-underline-offset:4px;}
.footer-bottom{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  padding:20px 0 28px;border-top:1px solid rgba(255,255,255,.14);
  font-size:12px;color:rgba(255,255,255,.55);
}

/* ---------- responsive ---------- */
@media (max-width:1280px){
  .hero-copy h1{font-size:38px;}
}
@media (max-width:1024px){
  .container{padding:0 20px;}
  .hero-panel{grid-template-columns:1fr;gap:28px;padding:32px;}
  .hero-figure img{height:240px;}
  .dim-grid{grid-template-columns:repeat(2,1fr);}
  .adv-layout{grid-template-columns:1fr;gap:28px;}
  .footer-grid{grid-template-columns:repeat(2,1fr);gap:28px;}
}
@media (max-width:768px){
  .container{padding:0 16px;}
  .header-top{height:60px;gap:12px;}
  .brand-name{font-size:18px;}
  .search input{width:130px;}
  .tool-link{display:none;}
  .nav-inner{overflow-x:auto;-webkit-overflow-scrolling:touch;scrollbar-width:none;}
  .nav-inner::-webkit-scrollbar{display:none;}
  .nav-list{gap:20px;flex-wrap:nowrap;white-space:nowrap;padding-right:32px;}
  .nav-fade{
    display:block;position:absolute;right:0;top:0;bottom:0;width:36px;
    background:linear-gradient(90deg,rgba(255,255,255,0),#fff);
    pointer-events:none;
  }
  .page-hero{padding:36px 0 44px;}
  .hero-copy h1{font-size:30px;}
  .hero-copy h1::after{width:72px;margin-top:16px;}
  .hero-lead{font-size:16px;}
  .section{padding:56px 0;}
  .section-head{flex-direction:column;align-items:flex-start;gap:12px;}
  .section-head h2,.adv-layout h2{font-size:24px;}
  .timeline li{flex-direction:column;gap:10px;}
  .timeline li::before{width:2px;}
  .time-block{flex:none;padding-left:16px;font-size:22px;}
  .dim-grid{grid-template-columns:1fr;}
  .rec-grid{grid-template-columns:1fr;}
  .cta-bar{padding:24px;flex-direction:column;align-items:flex-start;}
  .footer-grid{grid-template-columns:1fr;padding:40px 0 28px;}
}
@media (max-width:560px){
  body{font-size:15.5px;}
  .search{display:none;}
  .hero-panel{padding:24px 20px;}
  .hero-copy h1{font-size:26px;}
  .hero-actions{width:100%;flex-direction:column;}
  .hero-actions .btn{width:100%;}
  .btn{width:100%;}
  .cta-actions{width:100%;}
  .cta-actions .btn{width:100%;}
  .faq-q{padding:0 20px 0 22px;font-size:15.5px;}
  .faq-a p{padding:0 22px 20px;}
  .footer-bottom{flex-direction:column;}
}

/* roulang page: category4 */
:root{
  --c-primary:#1D5BD6;
  --c-primary-deep:#123A8C;
  --c-primary-soft:#E6EEFC;
  --c-accent:#FF7A2F;
  --c-accent-soft:#FFF1E7;
  --c-channel:#5B5BD6;
  --c-channel-soft:rgba(91,91,214,.12);
  --c-text:#0E1726;
  --c-text-2:#4A5A70;
  --c-text-3:#8593A6;
  --c-line:#DFE6F0;
  --c-line-soft:#EDF2F9;
  --c-bg:#F4F7FB;
  --c-surface:#FFFFFF;
  --c-surface-2:#EDF2F9;
  --r-s:8px;
  --r-m:12px;
  --r-l:16px;
  --r-xl:22px;
  --pill:999px;
  --sd-1:0 1px 2px rgba(15,32,66,.06),0 1px 3px rgba(15,32,66,.05);
  --sd-2:0 6px 20px rgba(15,32,66,.08);
  --sd-3:0 16px 40px rgba(15,32,66,.12);
  --ease:180ms cubic-bezier(.2,.7,.3,1);
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans SC","Noto Sans SC",system-ui,-apple-system,"Microsoft YaHei",sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--c-text);
  background:var(--c-bg);
  font-variant-numeric:tabular-nums;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none;transition:color var(--ease),background-color var(--ease),border-color var(--ease)}
a:visited{color:inherit}
button,input{font:inherit;color:inherit}
button{cursor:pointer;background:none;border:none}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
h1,h2,h3{font-weight:600;line-height:1.4}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;border-radius:4px}
.container{max-width:var(--container);margin:0 auto;padding:0 24px;width:100%}
.section{padding:88px 0}
.section-tight{padding:56px 0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:32px}
.section-head h2{font-size:30px;letter-spacing:.2px}
.section-head p{color:var(--c-text-2);font-size:15px;margin-top:8px;max-width:640px}
.text-link{display:inline-flex;align-items:center;gap:6px;color:var(--c-primary);font-size:15px;font-weight:600;white-space:nowrap}
.text-link svg{width:16px;height:16px;stroke:currentColor;fill:none;stroke-width:2;transition:transform var(--ease)}
.text-link:hover svg{transform:translateX(3px)}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:60;background:var(--c-surface);border-bottom:1px solid var(--c-line);transition:box-shadow var(--ease)}
.site-header.is-scrolled{box-shadow:var(--sd-1)}
.header-top{display:flex;align-items:center;justify-content:space-between;gap:24px;height:68px}
.brand{display:flex;align-items:center;gap:12px}
.brand-mark{width:38px;height:38px;border-radius:10px;background:linear-gradient(140deg,var(--c-primary),var(--c-primary-deep));display:flex;align-items:center;justify-content:center;flex:0 0 auto;box-shadow:var(--sd-1)}
.brand-mark svg{width:22px;height:22px}
.brand-text{display:flex;flex-direction:column;line-height:1.2}
.brand-name{font-size:20px;font-weight:600;letter-spacing:.4px}
.brand-sub{font-size:12px;color:var(--c-text-3);letter-spacing:2px}
.header-tools{display:flex;align-items:center;gap:20px}
.search{display:flex;align-items:center;gap:8px;background:var(--c-surface-2);border:1px solid transparent;border-radius:var(--pill);padding:0 16px;height:40px;transition:background-color var(--ease),border-color var(--ease),box-shadow var(--ease)}
.search svg{width:17px;height:17px;stroke:var(--c-text-3);fill:none;flex:0 0 auto}
.search input{border:none;background:transparent;outline:none;width:190px;font-size:14px;color:var(--c-text)}
.search input::placeholder{color:var(--c-text-3)}
.search:focus-within{background:var(--c-surface);border-color:var(--c-primary);box-shadow:0 0 0 3px rgba(29,91,214,.15)}
.tool-link{font-size:14px;color:var(--c-text-2)}
.tool-link:hover{color:var(--c-primary)}

.site-nav{background:var(--c-surface);border-top:1px solid var(--c-line-soft)}
.nav-inner{position:relative;height:52px;display:flex;align-items:center}
.nav-list{display:flex;align-items:center;gap:28px;overflow-x:auto;scrollbar-width:none;height:100%}
.nav-list::-webkit-scrollbar{display:none}
.nav-link{position:relative;display:flex;align-items:center;height:52px;font-size:15px;color:var(--c-text-2);padding:0 8px;border-radius:var(--r-s);white-space:nowrap;transition:color var(--ease),background-color var(--ease)}
.nav-link::after{content:"";position:absolute;left:8px;right:8px;bottom:8px;height:2px;border-radius:2px;background:transparent;transition:background-color var(--ease)}
.nav-link:hover{color:var(--c-primary);background:var(--c-primary-soft)}
.nav-link.is-active{color:var(--c-primary);font-weight:600}
.nav-link.is-active::after{background:var(--c-primary)}
.nav-fade{display:none}

/* ---------- breadcrumb ---------- */
.crumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--c-text-3);padding:20px 0 0}
.crumb a{color:var(--c-text-3)}
.crumb a:hover{color:var(--c-primary)}
.crumb span.sep{color:var(--c-line)}
.crumb span.current{color:var(--c-text-2)}

/* ---------- hero ---------- */
.channel-hero{position:relative;margin-top:20px;border-radius:var(--r-xl);overflow:hidden;box-shadow:var(--sd-2);background:var(--c-surface-2)}
.channel-hero .hero-bg{position:absolute;inset:0;background-image:url("/assets/images/backpic/back-2.webp");background-size:cover;background-position:center;opacity:.9}
.channel-hero .hero-veil{position:absolute;inset:0;background:linear-gradient(100deg,rgba(18,58,140,.88) 0%,rgba(18,58,140,.62) 46%,rgba(18,58,140,.18) 100%)}
.hero-grid{position:relative;display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);gap:36px;padding:56px 48px;align-items:center;min-height:420px}
.hero-copy .badge{display:inline-flex;align-items:center;gap:8px;background:rgba(255,255,255,.16);color:#fff;border:1px solid rgba(255,255,255,.32);border-radius:var(--pill);padding:5px 14px;font-size:12px;letter-spacing:1px}
.hero-copy h1{font-size:44px;color:#fff;margin:18px 0 0;line-height:1.28;letter-spacing:.3px}
.channel-rule{width:48px;height:4px;border-radius:3px;background:var(--c-channel);margin-top:20px}
.hero-copy .hero-sub{color:rgba(255,255,255,.9);font-size:17px;margin-top:18px;max-width:520px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}
.hero-card{background:var(--c-surface);border-radius:var(--r-xl);box-shadow:var(--sd-3);padding:26px 24px}
.hero-card h2{font-size:17px;margin-bottom:6px}
.hero-card p{font-size:14px;color:var(--c-text-2);line-height:1.75}
.hero-card .field{margin-top:16px}
.hero-card label{display:block;font-size:13px;color:var(--c-text-2);margin-bottom:6px}
.field-input{display:flex;align-items:center;gap:8px;border:1px solid var(--c-line);border-radius:var(--r-m);height:44px;padding:0 12px;background:var(--c-surface);transition:border-color var(--ease),box-shadow var(--ease)}
.field-input:focus-within{border-color:var(--c-primary);box-shadow:0 0 0 3px rgba(29,91,214,.15)}
.field-input svg{width:16px;height:16px;stroke:var(--c-text-3);fill:none;flex:0 0 auto}
.field-input input{flex:1;border:none;outline:none;background:transparent;font-size:15px;min-width:0}
.hero-card .hint{font-size:13px;color:var(--c-text-3);margin-top:10px}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:44px;padding:0 22px;border-radius:var(--r-m);font-size:15px;font-weight:600;border:1px solid transparent;transition:transform var(--ease),background-color var(--ease),box-shadow var(--ease),border-color var(--ease),color var(--ease)}
.btn svg{width:16px;height:16px;stroke:currentColor;fill:none;stroke-width:2}
.btn-primary{background:var(--c-primary);color:#fff;box-shadow:var(--sd-1)}
.btn-primary:hover{background:var(--c-primary-deep);transform:translateY(-1px);box-shadow:var(--sd-2)}
.btn-accent{background:var(--c-accent);color:#fff;box-shadow:var(--sd-1)}
.btn-accent:hover{background:#EA6414;transform:translateY(-1px);box-shadow:var(--sd-2)}
.btn-ghost{background:var(--c-surface);color:var(--c-text);border-color:var(--c-line)}
.btn-ghost:hover{background:var(--c-primary-soft);border-color:var(--c-primary);color:var(--c-primary-deep)}
.btn-on-dark{background:rgba(255,255,255,.14);color:#fff;border-color:rgba(255,255,255,.45)}
.btn-on-dark:hover{background:#fff;color:var(--c-primary-deep);border-color:#fff;transform:translateY(-1px)}
.btn-block{width:100%}
.btn:disabled{background:var(--c-surface-2);color:var(--c-text-3);cursor:not-allowed;box-shadow:none;border-color:transparent}

/* ---------- quick grid ---------- */
.quick-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px}
.quick-card{background:var(--c-surface);border:1px solid var(--c-line-soft);border-radius:var(--r-l);padding:24px 22px;box-shadow:var(--sd-1);transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);display:block}
.quick-card:hover{transform:translateY(-4px);box-shadow:var(--sd-3);border-color:var(--c-line)}
.quick-icon{width:44px;height:44px;border-radius:12px;background:var(--c-channel-soft);display:flex;align-items:center;justify-content:center;margin-bottom:16px}
.quick-icon svg{width:22px;height:22px;stroke:var(--c-channel);fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.quick-card h3{font-size:17px;margin-bottom:8px}
.quick-card p{font-size:14px;color:var(--c-text-2);line-height:1.75}
.quick-card .tag{margin-top:14px}

/* ---------- badges / tags ---------- */
.tag{display:inline-flex;align-items:center;gap:6px;font-size:12px;line-height:1;padding:5px 10px;border-radius:var(--pill);background:var(--c-channel-soft);color:var(--c-channel);letter-spacing:.4px}
.tag-soft{background:var(--c-primary-soft);color:var(--c-primary-deep)}
.tag-time{background:transparent;color:var(--c-text-3);padding:0}
.tag-time svg{width:13px;height:13px;stroke:currentColor;fill:none;stroke-width:1.8}

/* ---------- faq ---------- */
.faq-list{display:grid;gap:14px;max-width:900px}
.faq-item{background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-m);overflow:hidden;transition:border-color var(--ease),box-shadow var(--ease)}
.faq-item:hover{border-color:#C9D6E8}
.faq-item.is-open{border-color:var(--c-channel);box-shadow:var(--sd-2)}
.faq-q{display:flex;align-items:center;gap:14px;width:100%;text-align:left;min-height:56px;padding:12px 20px;font-size:16px;font-weight:600;color:var(--c-text);position:relative}
.faq-q::before{content:"";position:absolute;left:0;top:12px;bottom:12px;width:3px;border-radius:0 3px 3px 0;background:var(--c-channel);opacity:.9}
.faq-q .q-text{flex:1;padding-left:6px}
.faq-q .arrow{width:18px;height:18px;stroke:var(--c-text-3);fill:none;stroke-width:2;flex:0 0 auto;transition:transform var(--ease)}
.faq-item.is-open .faq-q .arrow{transform:rotate(90deg);stroke:var(--c-channel)}
.faq-a{display:grid;grid-template-rows:0fr;transition:grid-template-rows 220ms cubic-bezier(.2,.7,.3,1)}
.faq-item.is-open .faq-a{grid-template-rows:1fr}
.faq-a-inner{overflow:hidden}
.faq-a-inner p{font-size:15px;line-height:1.9;color:var(--c-text-2);padding:0 20px 20px 43px}
.faq-empty{display:none;border:1px dashed var(--c-line);border-radius:var(--r-l);padding:32px 20px;text-align:center;color:var(--c-text-2);font-size:14px;background:var(--c-surface)}
.faq-empty.is-show{display:block}

/* ---------- table ---------- */
.table-card{background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-l);box-shadow:var(--sd-1);overflow:hidden}
.table-wrap{overflow-x:auto}
table.spec{width:100%;min-width:720px;border-collapse:collapse;font-size:15px}
table.spec caption{text-align:left;font-size:13px;color:var(--c-text-3);padding:18px 24px 0}
table.spec th,table.spec td{padding:16px 24px;text-align:left;border-bottom:1px solid var(--c-line-soft);vertical-align:top;line-height:1.75}
table.spec thead th{background:var(--c-surface-2);font-size:13px;color:var(--c-text-2);font-weight:600;letter-spacing:.5px;border-bottom:1px solid var(--c-line)}
table.spec tbody tr:hover{background:#FAFCFF}
table.spec tbody tr:last-child td{border-bottom:none}
table.spec td:first-child{font-weight:600;color:var(--c-text)}
table.spec td.muted{color:var(--c-text-2)}

/* ---------- split blocks ---------- */
.split{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:48px;align-items:center}
.split-media{border-radius:var(--r-l);overflow:hidden;box-shadow:var(--sd-2);background:var(--c-surface-2)}
.split-media img{width:100%;height:100%;object-fit:cover;aspect-ratio:16/11}
.split-body h2{font-size:30px;margin-bottom:12px}
.split-body p{color:var(--c-text-2);font-size:15.5px;margin-bottom:16px}
.step-list{display:grid;gap:16px;margin-top:8px}
.step{display:flex;gap:14px;align-items:flex-start}
.step-num{flex:0 0 auto;width:34px;height:34px;border-radius:10px;background:var(--c-accent-soft);color:var(--c-accent);font-size:14px;font-weight:600;display:flex;align-items:center;justify-content:center}
.step-body h3{font-size:16px;margin-bottom:4px}
.step-body p{font-size:14px;color:var(--c-text-2);margin:0}

/* ---------- compact recommend ---------- */
.reco-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.reco-card{display:flex;align-items:center;gap:16px;background:var(--c-surface);border:1px solid var(--c-line-soft);border-radius:var(--r-l);padding:14px;box-shadow:var(--sd-1);transition:transform var(--ease),box-shadow var(--ease)}
.reco-card:hover{transform:translateY(-4px);box-shadow:var(--sd-3)}
.reco-card img{width:80px;height:80px;border-radius:var(--r-s);object-fit:cover;background:var(--c-surface-2);flex:0 0 auto}
.reco-body h3{font-size:16px;margin-bottom:6px}
.reco-card:hover .reco-body h3{color:var(--c-primary)}
.reco-body p{font-size:13px;color:var(--c-text-2);line-height:1.7;margin-bottom:6px}

/* ---------- cta bar ---------- */
.cta-bar{background:var(--c-primary-soft);border:1px solid #D3E1FA;border-radius:var(--r-xl);padding:30px 32px;display:flex;align-items:center;justify-content:space-between;gap:24px;box-shadow:var(--sd-1)}
.cta-bar h2{font-size:22px;margin-bottom:6px}
.cta-bar p{font-size:14px;color:var(--c-text-2)}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;flex:0 0 auto}
.copy-note{font-size:13px;color:#1F9D55;margin-top:10px;display:none}
.copy-note.is-show{display:block}

/* ---------- footer ---------- */
.site-footer{margin-top:88px;background:var(--c-primary-deep);color:rgba(255,255,255,.82)}
.footer-grid{display:grid;grid-template-columns:1.3fr 1fr 1fr 1fr;gap:40px;padding:56px 0 36px}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.footer-brand .brand-mark{background:rgba(255,255,255,.12);box-shadow:none}
.footer-brand .brand-name{color:#fff;font-size:18px;font-weight:600}
.footer-brand .brand-sub{color:rgba(255,255,255,.6)}
.site-footer p{font-size:14px;line-height:1.8;color:rgba(255,255,255,.72);max-width:320px}
.footer-col h3{font-size:15px;color:#fff;margin-bottom:16px;font-weight:600}
.footer-col ul{display:grid;gap:10px}
.footer-col a{font-size:14px;color:rgba(255,255,255,.72)}
.footer-col a:hover{color:var(--c-accent);text-decoration:underline;text-underline-offset:3px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.16);padding:18px 0 26px;display:flex;justify-content:space-between;gap:16px;font-size:12px;color:rgba(255,255,255,.6);flex-wrap:wrap}

/* ---------- responsive ---------- */
@media (max-width:1279px){
  .hero-copy h1{font-size:38px}
  .quick-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:1023px){
  .section{padding:64px 0}
  .section-tight{padding:44px 0}
  .header-top{height:64px}
  .search input{width:140px}
  .hero-grid{grid-template-columns:1fr;padding:40px 32px;min-height:0;gap:28px}
  .hero-copy h1{font-size:32px}
  .split{grid-template-columns:1fr;gap:28px}
  .split-media img{aspect-ratio:16/9}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .site-footer{margin-top:64px}
}
@media (max-width:767px){
  .container{padding:0 16px}
  .header-tools .tool-link{display:none}
  .search input{width:120px}
  .nav-list{gap:20px}
  .nav-fade{display:block;position:absolute;right:0;top:0;bottom:0;width:36px;pointer-events:none;background:linear-gradient(90deg,rgba(255,255,255,0),rgba(255,255,255,.95))}
  .section{padding:56px 0}
  .section-head{flex-direction:column;align-items:flex-start;gap:12px;margin-bottom:24px}
  .section-head h2{font-size:24px}
  .hero-grid{padding:28px 20px}
  .hero-copy h1{font-size:27px}
  .hero-copy .hero-sub{font-size:15.5px}
  .hero-actions .btn{width:100%}
  .reco-grid{grid-template-columns:1fr}
  .cta-bar{flex-direction:column;align-items:flex-start;padding:24px 20px}
  .cta-actions{width:100%}
  .cta-actions .btn{width:100%}
  .split-body h2{font-size:24px}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding:40px 0 28px}
  .faq-a-inner p{padding-left:20px}
}
@media (max-width:559px){
  body{font-size:15.5px}
  .brand-name{font-size:18px}
  .hero-copy h1{font-size:24px}
  .quick-grid{grid-template-columns:1fr}
  .section-head h2{font-size:22px}
  .footer-bottom{flex-direction:column;gap:8px}
}