/* roulang page: index */
:root{
  --brand-900:#123B58;
  --brand-600:#1B5E8C;
  --brand-100:#E7EFF6;
  --accent:#C08A4E;
  --bg:#FAF8F4;
  --surface:#FFFFFF;
  --ink:#1C2430;
  --ink-2:#5A6773;
  --line:#E6E2DA;
  --ok:#3F8F6B;
  --warn:#C0563F;
  --radius:14px;
  --radius-sm:10px;
  --shadow-sm:0 1px 2px rgba(18,59,88,.06);
  --shadow-md:0 10px 28px -14px rgba(18,59,88,.28);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,sans-serif;
  background:var(--bg);
  color:var(--ink);
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
button,input{font:inherit;color:inherit}
ul,ol{list-style:none;margin:0;padding:0}
h1,h2,h3,h4{margin:0;font-weight:600;line-height:1.35}
p{margin:0}
::selection{background:var(--brand-100);color:var(--brand-900)}
.container{width:100%;max-width:1200px;margin:0 auto;padding-left:16px;padding-right:16px}
@media(min-width:768px){.container{padding-left:24px;padding-right:24px}}
@media(min-width:1024px){.container{padding-left:32px;padding-right:32px}}
.section{padding:48px 0}
@media(min-width:1024px){.section{padding:80px 0}}
.section--tight{padding:36px 0}
@media(min-width:1024px){.section--tight{padding:56px 0}}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:14px;margin-bottom:28px}
.section-title{font-size:24px;font-weight:600;position:relative;padding-left:14px;letter-spacing:.01em}
@media(min-width:768px){.section-title{font-size:26px}}
.section-title::before{content:"";position:absolute;left:0;top:7px;bottom:7px;width:4px;border-radius:2px;background:var(--brand-600)}
.section-sub{margin-top:10px;color:var(--ink-2);font-size:14px;line-height:1.7;max-width:62ch}
.link-more{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:500;color:var(--brand-600);transition:gap .2s ease-out,color .2s}
.link-more:hover{gap:10px;color:var(--brand-900)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 22px;border-radius:var(--radius-sm);font-size:15px;font-weight:500;line-height:1.2;border:1px solid transparent;cursor:pointer;transition:background .2s ease-out,color .2s ease-out,transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out}
.btn:focus-visible{outline:2px solid var(--brand-600);outline-offset:2px}
.btn-primary{background:var(--brand-600);color:#fff}
.btn-primary:hover{background:var(--brand-900);transform:translateY(-1px);box-shadow:0 10px 22px -14px rgba(18,59,88,.75)}
.btn-primary:active{transform:translateY(0);box-shadow:none}
.btn-ghost{background:var(--surface);border-color:var(--brand-600);color:var(--brand-600)}
.btn-ghost:hover{background:var(--brand-100)}
.btn-ghost:active{transform:translateY(1px)}
.btn-light{background:transparent;border-color:rgba(255,255,255,.55);color:#fff}
.btn-light:hover{background:#fff;color:var(--brand-900);border-color:#fff}
.btn-light:active{transform:translateY(1px)}
.badge{display:inline-flex;align-items:center;gap:6px;padding:4px 10px;border-radius:999px;background:var(--brand-100);color:var(--brand-900);font-size:12px;line-height:1;font-weight:500;letter-spacing:.02em}
.badge--accent{background:rgba(192,138,78,.14);color:#8A5E2C}
.site-header{position:sticky;top:0;z-index:60;background:rgba(250,248,244,.94);border-bottom:1px solid transparent;transition:background .22s,box-shadow .22s,border-color .22s}
.site-header.is-stuck{background:#fff;border-bottom-color:var(--line);box-shadow:0 8px 24px -22px rgba(18,59,88,.9)}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;height:64px}
@media(min-width:1024px){.nav-wrap{height:72px}}
.logo{display:flex;align-items:center;gap:10px;font-size:16px;font-weight:600;letter-spacing:.01em;white-space:nowrap}
@media(min-width:1024px){.logo{font-size:17px}}
.logo-mark{width:22px;height:22px;border-radius:6px;background:var(--brand-600);position:relative;flex:none}
.logo-mark::after{content:"";position:absolute;inset:7px;border-radius:2px;background:var(--accent)}
.logo-sub{color:var(--ink-2);font-weight:400;font-size:13px;display:none}
@media(min-width:520px){.logo-sub{display:inline}}
.nav-menu{display:none}
@media(min-width:1024px){
  .nav-menu{display:flex;align-items:center;gap:2px}
  .nav-link{position:relative;padding:10px 14px;font-size:15px;color:var(--ink-2);border-radius:8px;transition:color .18s ease-out,background .18s ease-out}
  .nav-link::after{content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;background:var(--brand-600);transform:scaleX(0);transform-origin:left;transition:transform .18s ease-out}
  .nav-link:hover{color:var(--brand-600);background:var(--brand-100)}
  .nav-link:hover::after{transform:scaleX(1)}
  .nav-link.active{color:var(--brand-600);font-weight:600}
  .nav-link.active::after{transform:scaleX(1)}
  .nav-link:focus-visible{outline:2px solid var(--brand-600);outline-offset:2px}
}
.nav-actions{display:flex;align-items:center;gap:10px}
.icon-btn{width:40px;height:40px;border-radius:50%;border:1px solid var(--line);background:var(--surface);display:inline-flex;align-items:center;justify-content:center;color:var(--ink-2);cursor:pointer;transition:border-color .2s,color .2s,background .2s}
.icon-btn:hover{border-color:var(--brand-600);color:var(--brand-600);background:var(--brand-100)}
.icon-btn:focus-visible{outline:2px solid var(--brand-600);outline-offset:2px}
.nav-cta{display:none}
@media(min-width:1024px){.nav-cta{display:inline-flex;padding:10px 18px;font-size:14px}}
.hero{padding:32px 0 0;position:relative;overflow:hidden}
@media(min-width:1024px){.hero{padding:56px 0 0}}
.hero::before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(18,59,88,.03) 1px,transparent 1px),linear-gradient(90deg,rgba(18,59,88,.03) 1px,transparent 1px);background-size:44px 44px;pointer-events:none;mask-image:linear-gradient(180deg,rgba(0,0,0,.9),transparent 78%)}
.hero-grid{position:relative;display:grid;gap:32px;align-items:center}
@media(min-width:1024px){.hero-grid{grid-template-columns:1.05fr .95fr;gap:56px}}
.hero-title{font-size:clamp(28px,4vw,40px);line-height:1.25;font-weight:700;letter-spacing:-.01em}
.hero-title::after{content:"";display:block;width:56px;height:4px;border-radius:2px;background:var(--accent);margin-top:16px}
.hero-lead{margin-top:20px;font-size:16px;line-height:1.8;color:var(--ink-2);max-width:54ch}
.hero-actions{margin-top:28px;display:flex;flex-wrap:wrap;gap:12px}
.hero-figure{position:relative;border-radius:12px;overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow-md);aspect-ratio:4/3;background:var(--brand-100);margin:0}
.hero-figure img{width:100%;height:100%;object-fit:cover}
.hero-stats{display:flex;flex-wrap:wrap;margin-top:36px;padding-top:20px;border-top:1px solid var(--line)}
.hero-stats li{display:flex;flex-direction:column;gap:2px;padding:0 20px;border-left:1px solid var(--line)}
.hero-stats li:first-child{padding-left:0;border-left:0}
@media(min-width:768px){.hero-stats li{padding:0 28px}}
.hero-stats strong{font-size:20px;font-weight:600;color:var(--brand-900);font-variant-numeric:tabular-nums;line-height:1.3}
@media(min-width:768px){.hero-stats strong{font-size:22px}}
.hero-stats span{font-size:12px;color:var(--ink-2);letter-spacing:.02em}
.cover-grid{display:grid;gap:20px}
@media(min-width:768px){.cover-grid{grid-template-columns:1fr 1fr}.cover-card--main{grid-column:span 2}}
.cover-card{display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);border-radius:14px;overflow:hidden;box-shadow:var(--shadow-sm);transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out}
.cover-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-md);border-color:#D9E4EE}
.cover-card:focus-visible{outline:2px solid var(--brand-600);outline-offset:2px}
.cover-media{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--brand-100)}
.cover-card--main .cover-media{aspect-ratio:16/8}
.cover-media img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease-out}
.cover-card:hover .cover-media img{transform:scale(1.03)}
.cover-flag{position:absolute;top:14px;left:14px}
.cover-body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:10px;flex:1}
.cover-title{font-size:18px;font-weight:600;line-height:1.5;transition:color .2s}
@media(min-width:768px){.cover-title{font-size:19px}}
.cover-card:hover .cover-title{color:var(--brand-600)}
.cover-desc{font-size:14px;line-height:1.75;color:var(--ink-2)}
.cover-meta{margin-top:auto;padding-top:12px;display:flex;flex-wrap:wrap;gap:14px;font-size:13px;color:var(--ink-2);border-top:1px solid var(--line);font-variant-numeric:tabular-nums}
.catalog{display:grid;gap:24px}
@media(min-width:900px){.catalog{grid-template-columns:220px 1fr;gap:56px;align-items:start}}
.catalog-nav{display:flex;gap:8px;overflow-x:auto;padding-bottom:6px;scrollbar-width:none}
.catalog-nav::-webkit-scrollbar{display:none}
@media(min-width:900px){.catalog-nav{flex-direction:column;overflow:visible;gap:4px;position:sticky;top:96px;padding-bottom:0}}
.catalog-nav a{flex:none;padding:9px 16px;border-radius:999px;border:1px solid var(--line);background:var(--surface);font-size:14px;color:var(--ink-2);transition:all .2s ease-out;white-space:nowrap}
@media(min-width:900px){.catalog-nav a{border-radius:8px;border-color:transparent;background:transparent;padding:10px 14px;border-left:2px solid transparent}}
.catalog-nav a:hover{color:var(--brand-600);border-color:var(--brand-600);background:var(--brand-100)}
@media(min-width:900px){.catalog-nav a:hover{border-color:transparent;border-left-color:var(--brand-600)}}
.catalog-nav a:focus-visible{outline:2px solid var(--brand-600);outline-offset:2px}
.catalog-list{border-top:1px solid var(--line)}
.catalog-item{display:flex;align-items:flex-start;gap:16px;padding:20px 0;border-bottom:1px solid var(--line);transition:background .2s ease-out,padding-left .2s ease-out}
@media(min-width:768px){.catalog-item{gap:24px;padding:22px 0}}
.catalog-item:hover{background:rgba(231,239,246,.5);padding-left:8px}
.catalog-num{flex:none;min-width:32px;font-size:17px;font-weight:600;color:var(--accent);font-variant-numeric:tabular-nums;line-height:1.6}
@media(min-width:768px){.catalog-num{min-width:44px;font-size:20px}}
.catalog-content{flex:1;min-width:0}
.catalog-name{font-size:16px;font-weight:600;transition:color .2s}
@media(min-width:768px){.catalog-name{font-size:17px}}
.catalog-item:hover .catalog-name{color:var(--brand-600)}
.catalog-desc{margin-top:6px;font-size:14px;color:var(--ink-2);line-height:1.7}
.catalog-arrow{flex:none;align-self:center;color:var(--ink-2);transition:transform .2s ease-out,color .2s}
.catalog-item:hover .catalog-arrow{transform:translateX(4px);color:var(--brand-600)}
.news-grid{display:grid;gap:18px}
@media(min-width:700px){.news-grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1024px){.news-card--wide{grid-column:span 2}}
.news-card{display:grid;grid-template-columns:1fr;gap:14px;background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:20px;box-shadow:var(--shadow-sm);transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out}
@media(min-width:520px){.news-card{grid-template-columns:1fr auto;gap:20px;align-items:start}}
.news-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-md);border-color:#D9E4EE}
.news-card:focus-visible{outline:2px solid var(--brand-600);outline-offset:2px}
.news-body{min-width:0;display:flex;flex-direction:column;gap:10px}
.news-title{font-size:16px;font-weight:600;line-height:1.55;transition:color .2s}
@media(min-width:1024px){.news-card--wide .news-title{font-size:22px}}
.news-card:hover .news-title{color:var(--brand-600)}
.news-excerpt{font-size:14px;color:var(--ink-2);line-height:1.75}
.clamp-2{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-meta{margin-top:auto;display:flex;flex-wrap:wrap;align-items:center;gap:12px;font-size:13px;color:var(--ink-2);font-variant-numeric:tabular-nums}
.news-thumb{width:100%;aspect-ratio:16/10;border-radius:10px;overflow:hidden;background:var(--brand-100)}
@media(min-width:520px){.news-thumb{width:132px;aspect-ratio:4/3}}
@media(min-width:1024px){.news-card--wide .news-thumb{width:260px;aspect-ratio:16/9}}
.news-thumb img{width:100%;height:100%;object-fit:cover}
.empty-state{display:flex;flex-direction:column;align-items:center;gap:14px;padding:56px 24px;text-align:center;background:var(--surface);border:1px dashed var(--line);border-radius:14px}
.empty-state svg{color:var(--brand-600);opacity:.7}
.empty-state p{color:var(--ink-2);font-size:15px}
.feature-grid{display:grid;gap:24px}
@media(min-width:1024px){.feature-grid{grid-template-columns:7fr 5fr;gap:40px;align-items:start}}
.feature-main{display:block;background:var(--surface);border:1px solid var(--line);border-radius:14px;overflow:hidden;box-shadow:var(--shadow-sm);transition:transform .2s ease-out,box-shadow .2s ease-out}
.feature-main:hover{transform:translateY(-2px);box-shadow:var(--shadow-md)}
.feature-main:focus-visible{outline:2px solid var(--brand-600);outline-offset:2px}
.feature-media{aspect-ratio:16/9;overflow:hidden;background:var(--brand-100)}
.feature-media img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease-out}
.feature-main:hover .feature-media img{transform:scale(1.03)}
.feature-body{padding:22px 24px 24px}
.feature-title{font-size:20px;font-weight:600;line-height:1.5;margin-top:12px;transition:color .2s}
@media(min-width:1024px){.feature-title{font-size:24px}}
.feature-main:hover .feature-title{color:var(--brand-600)}
.feature-desc{margin-top:10px;font-size:14px;line-height:1.8;color:var(--ink-2)}
.feature-foot{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-top:18px;padding-top:16px;border-top:1px solid var(--line)}
.feature-meta{font-size:13px;color:var(--ink-2);font-variant-numeric:tabular-nums}
.feature-arrow{width:38px;height:38px;border-radius:50%;border:1px solid var(--line);display:inline-flex;align-items:center;justify-content:center;color:var(--brand-600);transition:all .2s ease-out}
.feature-main:hover .feature-arrow{background:var(--brand-600);border-color:var(--brand-600);color:#fff}
.mini-list{display:flex;flex-direction:column;border-top:1px solid var(--line)}
.mini-item{display:flex;gap:16px;align-items:flex-start;padding:18px 0;border-bottom:1px solid var(--line);transition:padding-left .2s ease-out}
.mini-item:hover{padding-left:6px}
.mini-item:focus-visible{outline:2px solid var(--brand-600);outline-offset:2px}
.mini-num{flex:none;font-size:15px;font-weight:600;color:var(--accent);font-variant-numeric:tabular-nums;line-height:1.7;min-width:26px}
.mini-title{font-size:15px;font-weight:500;line-height:1.6;transition:color .2s}
.mini-item:hover .mini-title{color:var(--brand-600)}
.mini-time{margin-top:4px;font-size:13px;color:var(--ink-2);font-variant-numeric:tabular-nums}
.tag-scroll{display:flex;gap:10px;overflow-x:auto;padding:4px 2px 14px;scrollbar-width:none;mask-image:linear-gradient(90deg,transparent,#000 18px,#000 calc(100% - 18px),transparent)}
.tag-scroll::-webkit-scrollbar{display:none}
.tag-pill{flex:none;padding:9px 18px;border-radius:999px;border:1px solid var(--line);background:var(--surface);font-size:14px;color:var(--ink-2);transition:all .2s ease-out}
.tag-pill:hover{color:var(--brand-600);border-color:var(--brand-600);background:var(--brand-100);transform:translateY(-1px)}
.tag-pill:focus-visible{outline:2px solid var(--brand-600);outline-offset:2px}
.faq-list{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item summary{list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:18px;padding:20px 2px;font-size:16px;font-weight:600;line-height:1.6;transition:color .2s}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--brand-600)}
.faq-item summary:focus-visible{outline:2px solid var(--brand-600);outline-offset:2px}
.faq-plus{flex:none;width:22px;height:22px;color:var(--brand-600);transition:transform .2s ease-out}
.faq-item[open] .faq-plus{transform:rotate(45deg)}
.faq-answer{padding:0 2px 22px;font-size:15px;line-height:1.85;color:var(--ink-2);max-width:72ch}
.cta-band{background:var(--brand-900);color:#fff;border-radius:16px;padding:32px 24px}
@media(min-width:768px){.cta-band{padding:40px 44px;display:flex;align-items:center;justify-content:space-between;gap:32px}}
.cta-title{font-size:20px;font-weight:600;line-height:1.5}
@media(min-width:768px){.cta-title{font-size:22px}}
.cta-desc{margin-top:10px;font-size:14px;line-height:1.8;color:rgba(255,255,255,.72);max-width:48ch}
.cta-actions{margin-top:22px;display:flex;flex-wrap:wrap;gap:12px}
@media(min-width:768px){.cta-actions{margin-top:0;flex:none}}
.site-footer{background:var(--brand-900);color:rgba(255,255,255,.72);margin-top:48px;padding:48px 0 0}
@media(min-width:1024px){.site-footer{margin-top:80px;padding-top:64px}}
.footer-grid{display:grid;gap:32px}
@media(min-width:640px){.footer-grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1024px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px}}
.footer-brand{display:flex;align-items:center;gap:10px;font-size:17px;font-weight:600;color:#fff}
.footer-mark{width:22px;height:22px;border-radius:6px;background:#fff;position:relative;flex:none}
.footer-mark::after{content:"";position:absolute;inset:7px;border-radius:2px;background:var(--accent)}
.footer-about{margin-top:14px;font-size:14px;line-height:1.85;max-width:34ch}
.footer-h{font-size:14px;font-weight:600;color:#fff;letter-spacing:.02em;margin-bottom:14px}
.footer-links{display:flex;flex-direction:column;gap:10px;font-size:14px}
.footer-links a{transition:color .2s ease-out,padding-left .2s ease-out}
.footer-links a:hover{color:var(--accent);padding-left:4px}
.footer-links a:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.footer-note{font-size:13px;line-height:1.8;color:rgba(255,255,255,.6)}
.footer-bottom{margin-top:40px;border-top:1px solid rgba(255,255,255,.14);padding:20px 0;display:flex;flex-wrap:wrap;gap:8px 20px;justify-content:space-between;font-size:13px;color:rgba(255,255,255,.55)}
.mobile-tab{display:none}
@media(max-width:1023px){
  .mobile-tab{display:flex;position:fixed;left:0;right:0;bottom:0;z-index:70;background:#fff;border-top:1px solid var(--line);box-shadow:0 -6px 20px -16px rgba(18,59,88,.7);padding-bottom:env(safe-area-inset-bottom);height:calc(56px + env(safe-area-inset-bottom))}
  .tab-item{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;font-size:11px;color:var(--ink-2);min-height:44px;position:relative;transition:color .18s}
  .tab-item svg{width:20px;height:20px;stroke-width:1.7}
  .tab-item.active{color:var(--brand-600);font-weight:600}
  .tab-item.active::before{content:"";position:absolute;top:5px;width:16px;height:2px;border-radius:2px;background:var(--brand-600)}
  .tab-item:active{background:var(--brand-100)}
  body{padding-bottom:88px}
}
.search-row{display:none;border-top:1px solid var(--line);background:#fff}
.search-row.open{display:block}
.search-inner{display:flex;gap:10px;padding:14px 0;flex-wrap:wrap}
.search-input{flex:1;min-width:180px;height:44px;border-radius:10px;border:1px solid var(--line);padding:0 14px;background:var(--bg);font-size:15px;transition:border-color .2s,box-shadow .2s}
.search-input:focus{outline:none;border-color:var(--brand-600);box-shadow:0 0 0 3px rgba(27,94,140,.12)}
.search-hint{font-size:13px;color:var(--ink-2);align-self:center}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important;scroll-behavior:auto!important}}

/* roulang page: category1 */
:root{
  --brand-900:#123B58;
  --brand-600:#1B5E8C;
  --brand-100:#E7EFF6;
  --accent:#C08A4E;
  --bg:#FAF8F4;
  --surface:#FFFFFF;
  --ink:#1C2430;
  --ink-2:#5A6773;
  --line:#E6E2DA;
  --ok:#3F8F6B;
  --warn:#C0563F;
  --radius-card:14px;
  --radius-img:12px;
  --radius-btn:10px;
  --shadow-card:0 1px 2px rgba(18,59,88,.06);
  --shadow-hover:0 10px 28px -14px rgba(18,59,88,.28);
  --ease:200ms ease-out;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-radius:var(--radius-img);}
a{color:inherit;text-decoration:none;transition:color var(--ease);}
button{font-family:inherit;}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;}
ul,ol{padding:0;list-style:none;}
a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{
  outline:2px solid var(--brand-600);
  outline-offset:2px;
  border-radius:6px;
}
.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding-left:16px;
  padding-right:16px;
}
@media (min-width:768px){.container{padding-left:24px;padding-right:24px;}}
@media (min-width:1024px){.container{padding-left:32px;padding-right:32px;}}

/* ---------- header ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:var(--surface);
  border-bottom:1px solid var(--line);
  transition:box-shadow var(--ease),background var(--ease);
}
.site-header.is-scrolled{box-shadow:0 8px 24px -18px rgba(18,59,88,.5);}
.nav-wrap{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  height:64px;
}
@media (min-width:1024px){.nav-wrap{height:72px;}}
.logo{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:16px;
  font-weight:600;
  letter-spacing:.01em;
  color:var(--brand-900);
  white-space:nowrap;
}
.logo:hover{color:var(--brand-600);}
.logo-mark{
  width:16px;height:16px;
  border-radius:4px;
  background:linear-gradient(160deg,var(--brand-600),var(--brand-900));
  display:inline-block;
  flex:none;
}
.logo-sub{color:var(--ink-2);font-weight:400;font-size:13px;}
@media (max-width:479px){.logo-sub{display:none;}}
.nav-menu{display:none;}
@media (min-width:1024px){
  .nav-menu{display:flex;align-items:center;gap:26px;}
}
.nav-link{
  position:relative;
  font-size:15px;
  color:var(--ink-2);
  padding:6px 0;
  white-space:nowrap;
}
.nav-link::after{
  content:"";
  position:absolute;
  left:0;bottom:0;
  height:2px;width:0;
  background:var(--brand-600);
  transition:width 180ms ease-out;
}
.nav-link:hover{color:var(--brand-900);}
.nav-link:hover::after,.nav-link:focus-visible::after{width:100%;}
.nav-link.active{color:var(--brand-900);font-weight:600;}
.nav-link.active::after{width:100%;}
.nav-actions{display:flex;align-items:center;gap:10px;}
.icon-btn{
  width:40px;height:40px;
  display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--line);
  border-radius:999px;
  background:var(--surface);
  color:var(--brand-900);
  cursor:pointer;
  transition:all var(--ease);
}
.icon-btn:hover{background:var(--brand-100);border-color:var(--brand-100);}
.icon-btn:active{transform:translateY(1px);}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:11px 20px;
  border-radius:var(--radius-btn);
  font-size:15px;
  font-weight:500;
  line-height:1.2;
  border:1px solid transparent;
  cursor:pointer;
  transition:all var(--ease);
  white-space:nowrap;
}
.btn-primary{background:var(--brand-600);color:#fff;border-color:var(--brand-600);}
.btn-primary:hover{background:var(--brand-900);border-color:var(--brand-900);transform:translateY(-1px);}
.btn-primary:active{transform:translateY(0);}
.btn-outline{background:transparent;color:var(--brand-600);border-color:var(--brand-600);}
.btn-outline:hover{background:var(--brand-100);}
.btn-ghost{background:transparent;color:var(--brand-900);border-color:rgba(255,255,255,.45);}
.nav-cta{display:none;}
@media (min-width:768px){.nav-cta{display:inline-flex;}}
@media (max-width:639px){.nav-cta{display:none;}}
.search-row{
  display:none;
  border-top:1px solid var(--line);
  background:var(--surface);
}
.search-row.is-open{display:block;}
.search-inner{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:12px;
  padding:14px 0 18px;
}
.search-input{
  flex:1 1 260px;
  height:44px;
  padding:0 14px;
  font-size:15px;
  color:var(--ink);
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-btn);
  transition:all var(--ease);
}
.search-input::placeholder{color:#98A2AD;}
.search-input:focus{
  outline:none;
  border-color:var(--brand-600);
  box-shadow:0 0 0 3px rgba(27,94,140,.12);
}
.search-hint{font-size:13px;color:var(--ink-2);}

/* ---------- page head ---------- */
.page-head{padding:32px 0 8px;}
@media (min-width:1024px){.page-head{padding:44px 0 12px;}}
.crumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--ink-2);
  margin-bottom:20px;
}
.crumb a:hover{color:var(--brand-600);}
.crumb span[aria-current]{color:var(--brand-900);}
.head-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:24px;
  align-items:center;
}
@media (min-width:900px){
  .head-grid{grid-template-columns:minmax(0,1fr) 360px;gap:48px;}
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:12px;
  letter-spacing:.02em;
  font-weight:500;
  color:var(--brand-900);
  background:var(--brand-100);
  border-radius:999px;
  padding:5px 12px;
  margin-bottom:14px;
}
.eyebrow::before{
  content:"";
  width:6px;height:6px;border-radius:999px;background:var(--accent);
}
.page-head h1{
  font-size:clamp(26px,4vw,38px);
  line-height:1.3;
  font-weight:700;
  color:var(--brand-900);
  letter-spacing:.005em;
}
.rule-accent{
  width:56px;height:4px;
  border-radius:999px;
  background:var(--accent);
  margin:16px 0 18px;
}
.lede{
  font-size:16px;
  line-height:1.8;
  color:var(--ink-2);
  max-width:56ch;
}
.head-cover{
  border-radius:var(--radius-img);
  border:1px solid var(--line);
  overflow:hidden;
  box-shadow:var(--shadow-card);
  aspect-ratio:16/10;
  background:var(--brand-100);
}
.head-cover img{
  width:100%;height:100%;
  object-fit:cover;
  border-radius:0;
}
.fact-strip{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px 0;
  margin-top:26px;
  padding-top:18px;
  border-top:1px solid var(--line);
  font-size:14px;
  color:var(--ink-2);
}
.fact-strip span{display:inline-flex;align-items:center;font-variant-numeric:tabular-nums;}
.fact-strip span+span::before{
  content:"";
  display:inline-block;
  width:1px;height:14px;
  background:var(--line);
  margin:0 16px;
}

/* ---------- anchor chips ---------- */
.anchor-bar{
  padding:24px 0 8px;
  position:relative;
}
.chip-row{
  display:flex;
  gap:10px;
  overflow-x:auto;
  padding-bottom:6px;
  scrollbar-width:none;
  -ms-overflow-style:none;
}
.chip-row::-webkit-scrollbar{display:none;}
.chip{
  flex:none;
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:8px 16px;
  font-size:14px;
  color:var(--brand-900);
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:999px;
  transition:all var(--ease);
}
.chip:hover{background:var(--brand-100);border-color:var(--brand-100);transform:translateY(-1px);}
.chip:active{transform:translateY(0);}

/* ---------- numbered list ---------- */
.section{padding:48px 0;}
@media (min-width:1024px){.section{padding:72px 0;}}
.section-head{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  justify-content:space-between;
  gap:14px;
  margin-bottom:28px;
}
.section-head h2{
  position:relative;
  font-size:24px;
  line-height:1.35;
  font-weight:600;
  color:var(--brand-900);
  padding-left:14px;
}
.section-head h2::before{
  content:"";
  position:absolute;
  left:0;top:6px;
  width:4px;height:20px;
  border-radius:2px;
  background:var(--brand-600);
}
.section-head p{font-size:14px;color:var(--ink-2);}
.num-list{
  border-top:1px solid var(--line);
}
.num-item{
  display:grid;
  grid-template-columns:44px minmax(0,1fr) 28px;
  gap:16px;
  align-items:start;
  padding:24px 0;
  border-bottom:1px solid var(--line);
  transition:background var(--ease);
}
@media (min-width:768px){
  .num-item{grid-template-columns:64px minmax(0,1fr) 32px;gap:24px;padding:28px 0;}
}
.num-item:hover{background:rgba(231,239,246,.45);}
.num-item:hover .num-title{color:var(--brand-600);}
.num-item:hover .arrow{transform:translateX(4px);color:var(--brand-600);}
.num{
  font-size:26px;
  font-weight:700;
  line-height:1.2;
  color:var(--accent);
  font-variant-numeric:tabular-nums;
  letter-spacing:.02em;
  padding-top:2px;
}
@media (min-width:768px){.num{font-size:32px;}}
.num-title{
  font-size:19px;
  line-height:1.5;
  font-weight:600;
  color:var(--brand-900);
  transition:color var(--ease);
  margin-bottom:8px;
}
.num-desc{
  font-size:15px;
  line-height:1.8;
  color:var(--ink-2);
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
  margin-bottom:12px;
}
.num-foot{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px 12px;
}
.tag{
  display:inline-flex;
  align-items:center;
  font-size:12px;
  line-height:1;
  letter-spacing:.02em;
  font-weight:500;
  padding:5px 10px;
  border-radius:999px;
  background:var(--brand-100);
  color:var(--brand-900);
  transition:background var(--ease);
}
.tag-accent{
  background:rgba(192,138,78,.14);
  color:#8A5D2B;
}
.time-meta{
  font-size:13px;
  color:var(--ink-2);
  font-variant-numeric:tabular-nums;
}
.arrow{
  width:28px;height:28px;
  display:inline-flex;align-items:center;justify-content:center;
  color:var(--ink-2);
  transition:transform var(--ease),color var(--ease);
  margin-top:4px;
}

/* ---------- related ---------- */
.related{
  display:grid;
  grid-template-columns:1fr;
  gap:14px;
}
@media (min-width:640px){.related{grid-template-columns:repeat(2,minmax(0,1fr));}}
@media (min-width:1024px){.related{grid-template-columns:repeat(3,minmax(0,1fr));}}
.rel-card{
  display:block;
  padding:20px 22px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-card);
  transition:all var(--ease);
}
.rel-card:hover{box-shadow:var(--shadow-hover);transform:translateY(-2px);}
.rel-card:hover .rel-title{color:var(--brand-600);}
.rel-title{
  font-size:16px;
  font-weight:600;
  color:var(--brand-900);
  line-height:1.5;
  margin-bottom:6px;
  transition:color var(--ease);
}
.rel-desc{font-size:14px;line-height:1.7;color:var(--ink-2);}

/* ---------- faq ---------- */
.faq{border-top:1px solid var(--line);}
.faq details{border-bottom:1px solid var(--line);}
.faq summary{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:18px 0;
  font-size:16px;
  font-weight:600;
  color:var(--brand-900);
  cursor:pointer;
  list-style:none;
}
.faq summary::-webkit-details-marker{display:none;}
.faq summary::after{
  content:"+";
  flex:none;
  width:22px;height:22px;
  display:inline-flex;align-items:center;justify-content:center;
  font-size:20px;
  font-weight:400;
  line-height:1;
  color:var(--brand-600);
  transition:transform var(--ease);
}
.faq details[open] summary::after{transform:rotate(45deg);}
.faq-answer{
  font-size:15px;
  line-height:1.8;
  color:var(--ink-2);
  max-width:72ch;
  padding:0 0 20px;
}

/* ---------- cta ---------- */
.cta-band{
  background:var(--brand-900);
  color:#fff;
  border-radius:var(--radius-card);
  padding:32px 24px;
  display:grid;
  grid-template-columns:1fr;
  gap:22px;
  align-items:center;
}
@media (min-width:900px){
  .cta-band{grid-template-columns:minmax(0,1fr) auto;padding:36px 40px;gap:32px;}
}
.cta-band h2{
  font-size:22px;
  line-height:1.4;
  font-weight:600;
  margin-bottom:8px;
}
.cta-band p{
  font-size:14px;
  line-height:1.8;
  color:rgba(255,255,255,.78);
  max-width:60ch;
}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;}
.cta-actions .btn{
  border-color:rgba(255,255,255,.5);
  color:#fff;
  background:transparent;
}
.cta-actions .btn:hover{background:#fff;color:var(--brand-900);border-color:#fff;transform:translateY(-1px);}
.cta-actions .btn:active{transform:translateY(1px);}

/* ---------- footer ---------- */
.site-footer{
  background:var(--brand-900);
  color:rgba(255,255,255,.8);
  margin-top:56px;
  padding:48px 0 0;
}
@media (min-width:1024px){.site-footer{margin-top:80px;padding-top:64px;}}
.footer-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:32px;
  padding-bottom:36px;
}
@media (min-width:640px){.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;}}
.footer-brand{
  display:flex;
  align-items:center;
  gap:8px;
  font-size:16px;
  font-weight:600;
  color:#fff;
  margin-bottom:14px;
}
.footer-mark{
  width:16px;height:16px;border-radius:4px;
  background:var(--accent);
  display:inline-block;
  flex:none;
}
.footer-about{
  font-size:14px;
  line-height:1.8;
  color:rgba(255,255,255,.68);
  max-width:38ch;
}
.footer-h{
  font-size:14px;
  font-weight:600;
  color:#fff;
  margin-bottom:14px;
  letter-spacing:.02em;
}
.footer-links{display:flex;flex-direction:column;gap:10px;}
.footer-links a{
  font-size:14px;
  color:rgba(255,255,255,.72);
  transition:color var(--ease);
}
.footer-links a:hover{color:var(--accent);}
.footer-note{font-size:13px;line-height:1.8;color:rgba(255,255,255,.6);}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:10px;
  border-top:1px solid rgba(255,255,255,.14);
  padding:18px 0 24px;
  font-size:13px;
  color:rgba(255,255,255,.6);
}

/* ---------- mobile tab ---------- */
.mobile-tab{
  position:fixed;
  left:0;right:0;bottom:0;
  z-index:70;
  display:flex;
  background:var(--surface);
  border-top:1px solid var(--line);
  box-shadow:0 -6px 20px -16px rgba(18,59,88,.6);
  padding-bottom:env(safe-area-inset-bottom);
  height:calc(56px + env(safe-area-inset-bottom));
}
@media (min-width:1024px){.mobile-tab{display:none;}}
.tab-item{
  position:relative;
  flex:1 1 0;
  min-width:44px;
  min-height:44px;
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:3px;
  font-size:11px;
  color:var(--ink-2);
  transition:color var(--ease);
}
.tab-item svg{width:20px;height:20px;}
.tab-item.active{color:var(--brand-600);font-weight:600;}
.tab-item.active::before{
  content:"";
  position:absolute;
  top:6px;
  width:16px;height:2px;
  border-radius:2px;
  background:var(--brand-600);
}
.tab-item:hover{color:var(--brand-600);}
@media (max-width:1023px){
  body{padding-bottom:calc(88px + env(safe-area-inset-bottom));}
}
.sr-only{
  position:absolute;
  width:1px;height:1px;
  padding:0;margin:-1px;
  overflow:hidden;
  clip:rect(0 0 0 0);
  white-space:nowrap;
  border:0;
}

/* roulang page: article */
:root{
  --brand-900:#123B58;
  --brand-600:#1B5E8C;
  --brand-100:#E7EFF6;
  --accent:#C08A4E;
  --bg:#FAF8F4;
  --surface:#FFFFFF;
  --ink:#1C2430;
  --ink-2:#5A6773;
  --line:#E6E2DA;
  --ok:#3F8F6B;
  --warn:#C0563F;
  --radius-card:14px;
  --radius-img:12px;
  --radius-btn:10px;
  --shadow-card:0 1px 2px rgba(18,59,88,.06);
  --shadow-hover:0 10px 28px -14px rgba(18,59,88,.28);
  --font-cn:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:96px}
body{
  margin:0;
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.8;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-radius:var(--radius-img)}
a{color:inherit;text-decoration:none;transition:color .18s ease,background-color .18s ease,border-color .18s ease}
button{font:inherit;color:inherit;cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
:focus-visible{outline:2px solid var(--brand-600);outline-offset:2px;border-radius:4px}
.container{width:100%;max-width:1200px;margin:0 auto;padding-left:16px;padding-right:16px}
@media(min-width:768px){.container{padding-left:24px;padding-right:24px}}
@media(min-width:1024px){.container{padding-left:32px;padding-right:32px}}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:var(--surface);
  border-bottom:1px solid var(--line);
  transition:box-shadow .2s ease;
}
.site-header.is-scrolled{box-shadow:0 6px 20px -14px rgba(18,59,88,.45)}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;gap:20px;height:72px}
.logo{display:flex;align-items:center;gap:10px;font-size:17px;font-weight:700;letter-spacing:.01em;color:var(--brand-900);white-space:nowrap}
.logo-mark{width:14px;height:14px;border-radius:4px;background:var(--brand-600);box-shadow:4px 4px 0 -1px rgba(192,138,78,.75);flex:none}
.logo-sub{font-size:12px;font-weight:500;color:var(--ink-2);letter-spacing:.04em}
.nav-menu{display:flex;align-items:center;gap:26px}
.nav-link{position:relative;font-size:15px;color:var(--ink-2);padding:6px 0;line-height:1.4;font-weight:500}
.nav-link::after{content:"";position:absolute;left:0;bottom:0;width:0;height:2px;background:var(--brand-600);border-radius:2px;transition:width .18s ease}
.nav-link:hover{color:var(--brand-900)}
.nav-link:hover::after{width:100%}
.nav-link.active{color:var(--brand-900);font-weight:600}
.nav-link.active::after{width:100%}
.nav-actions{display:flex;align-items:center;gap:12px}
.icon-btn{
  width:40px;height:40px;display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--line);border-radius:999px;background:var(--surface);color:var(--brand-900);
  transition:background-color .18s ease,border-color .18s ease,transform .18s ease;
}
.icon-btn:hover{background:var(--brand-100);border-color:#C9DCEB}
.icon-btn:active{transform:translateY(1px)}
.search-row{max-height:0;overflow:hidden;border-top:1px solid transparent;transition:max-height .28s ease,border-color .2s ease;background:var(--surface)}
.search-row.is-open{max-height:120px;border-top-color:var(--line)}
.search-inner{display:flex;align-items:center;gap:12px;flex-wrap:wrap;padding:16px 0}
.search-input{
  flex:1 1 260px;height:44px;border:1px solid var(--line);border-radius:var(--radius-btn);
  padding:0 14px;font-size:15px;background:#FCFAF6;color:var(--ink);transition:border-color .18s ease,box-shadow .18s ease;
}
.search-input::placeholder{color:#9AA6B1}
.search-input:focus{outline:none;border-color:var(--brand-600);box-shadow:0 0 0 3px rgba(27,94,140,.12);background:var(--surface)}
.search-hint{font-size:13px;color:var(--ink-2)}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:var(--radius-btn);font-size:15px;font-weight:600;
  border:1px solid transparent;line-height:1.2;transition:all .18s ease;white-space:nowrap;
}
.btn-primary{background:var(--brand-600);color:#fff;box-shadow:0 6px 16px -12px rgba(27,94,140,.9)}
.btn-primary:hover{background:var(--brand-900);transform:translateY(-1px)}
.btn-primary:active{transform:translateY(1px);box-shadow:none}
.btn-ghost{background:var(--surface);color:var(--brand-600);border-color:var(--brand-600)}
.btn-ghost:hover{background:var(--brand-100);transform:translateY(-1px)}
.btn-ghost:active{transform:translateY(1px)}
.btn-text{background:none;border:none;color:var(--brand-600);font-weight:600;padding:6px 0;display:inline-flex;align-items:center;gap:6px}
.btn-text:hover{color:var(--brand-900)}
.btn-text .arrow{transition:transform .18s ease}
.btn-text:hover .arrow{transform:translateX(4px)}
.btn-sm{padding:9px 16px;font-size:14px}
.btn[disabled],.btn.is-disabled{opacity:.5;cursor:not-allowed;transform:none}

/* ============ 徽章 / 标签 ============ */
.badge{
  display:inline-flex;align-items:center;gap:6px;padding:4px 10px;border-radius:999px;
  font-size:12px;font-weight:500;letter-spacing:.02em;line-height:1.4;
  background:var(--brand-100);color:var(--brand-900);
}
.badge-accent{background:rgba(192,138,78,.14);color:#8A5F2E}
.tag{
  display:inline-flex;align-items:center;padding:5px 12px;border-radius:999px;
  font-size:13px;color:var(--interior,#3A4A58);background:#F1EDE5;border:1px solid var(--line);
  transition:all .18s ease;
}
.tag:hover{background:var(--brand-100);border-color:#C9DCEB;color:var(--brand-900)}

/* ============ 面包屑 ============ */
.breadcrumb{padding:22px 0 0}
.breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--ink-2)}
.breadcrumb li+li::before{content:"/";margin-right:8px;color:#C6C0B6}
.breadcrumb a:hover{color:var(--brand-600)}
.breadcrumb li[aria-current="page"]{color:var(--ink);max-width:52ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* ============ 文章头部 ============ */
.article-head{padding:26px 0 0;max-width:860px}
.article-title{
  font-size:clamp(26px,4vw,38px);line-height:1.3;font-weight:700;color:var(--ink);
  margin-top:14px;letter-spacing:-.01em;
}
.meta-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-top:18px;font-size:14px;color:var(--ink-2)}
.meta-row .dot{width:3px;height:3px;border-radius:50%;background:#C6C0B6;display:inline-block}
.meta-row time{font-variant-numeric:tabular-nums}

/* ============ 文章布局 ============ */
.article-layout{
  display:grid;grid-template-columns:1fr;gap:40px;
  padding:34px 0 0;
}
@media(min-width:1024px){
  .article-layout{grid-template-columns:minmax(0,8fr) minmax(0,4fr);gap:48px;padding-top:44px}
}
.article-main{min-width:0}
.article-cover{margin-bottom:28px;overflow:hidden;border-radius:var(--radius-img);border:1px solid var(--line);background:#EFE9DF}
.article-cover img{width:100%;aspect-ratio:16/9;object-fit:cover}

/* 正文排版 */
.article-body{max-width:760px;font-size:16px;line-height:1.85;color:#243040}
.article-body p{margin:0 0 1.1em;color:#243040}
.article-body h2{
  position:relative;font-size:24px;line-height:1.4;font-weight:600;color:var(--ink);
  margin:2em 0 .6em;padding-left:16px;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.42em;width:4px;height:20px;border-radius:2px;background:var(--brand-600);
}
.article-body h3{font-size:19px;line-height:1.5;font-weight:600;color:var(--ink);margin:1.6em 0 .5em}
.article-body h4{font-size:17px;font-weight:600;color:var(--ink);margin:1.4em 0 .4em}
.article-body a{color:var(--brand-600);text-decoration:underline;text-underline-offset:3px}
.article-body a:hover{color:var(--brand-900)}
.article-body strong{font-weight:600;color:var(--ink)}
.article-body ul,.article-body ol{margin:0 0 1.2em;padding-left:4px}
.article-body ul li,.article-body ol li{position:relative;padding-left:20px;margin-bottom:8px}
.article-body ul li::before{
  content:"";position:absolute;left:2px;top:.72em;width:6px;height:6px;border-radius:2px;background:var(--accent);
}
.article-body ol{counter-reset:node}
.article-body ol li{counter-increment:node}
.article-body ol li::before{
  content:counter(node) ".";position:absolute;left:0;top:0;color:var(--accent);
  font-weight:600;font-variant-numeric:tabular-nums;font-size:15px;
}
.article-body blockquote{
  margin:1.6em 0;padding:16px 20px;background:var(--brand-100);
  border-left:3px solid var(--brand-600);border-radius:0 10px 10px 0;color:#254257;font-size:15.5px;
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{margin:1.6em 0;width:100%;border-radius:var(--radius-img);border:1px solid var(--line)}
.article-body figure{margin:1.6em 0}
.article-body figcaption{text-align:center;font-size:14px;color:var(--ink-2);margin-top:10px}
.article-body table{width:100%;border-collapse:collapse;margin:1.6em 0;font-size:15px}
.article-body th,.article-body td{border:1px solid var(--line);padding:10px 14px;text-align:left}
.article-body th{background:#F4F0E8;font-weight:600;color:var(--brand-900)}
.article-body hr{border:none;border-top:1px solid var(--line);margin:2em 0}

/* 空态 */
.empty-state{
  border:1px dashed #D3CCBF;background:var(--surface);border-radius:var(--radius-card);
  padding:48px 24px;text-align:center;max-width:760px;
}
.empty-state svg{width:36px;height:36px;color:var(--brand-600);margin:0 auto 14px}
.empty-state h2{font-size:19px;font-weight:600;color:var(--ink)}
.empty-state p{font-size:14.5px;color:var(--ink-2);margin:10px auto 20px;max-width:44ch}

/* ============ 侧栏 ============ */
.article-side{display:flex;flex-direction:column;gap:20px}
@media(min-width:1024px){
  .article-side{position:sticky;top:96px;align-self:start}
}
.side-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  box-shadow:var(--shadow-card);padding:20px;
}
.side-title{font-size:15px;font-weight:600;color:var(--brand-900);display:flex;align-items:center;gap:8px;margin-bottom:14px}
.side-title::before{content:"";width:4px;height:14px;border-radius:2px;background:var(--accent)}
.toc-list{display:flex;flex-direction:column;gap:2px;max-height:320px;overflow:auto}
.toc-link{
  display:block;font-size:14px;color:var(--ink-2);padding:7px 10px 7px 12px;
  border-left:2px solid transparent;border-radius:0 6px 6px 0;line-height:1.6;
  transition:all .18s ease;
}
.toc-link:hover{color:var(--brand-900);background:#F7F4EE}
.toc-link.active{color:var(--brand-900);font-weight:600;border-left-color:var(--brand-600);background:var(--brand-100)}
.side-actions{display:flex;gap:10px;flex-wrap:wrap}
.side-actions .btn{flex:1 1 auto}
.side-list{display:flex;flex-direction:column}
.side-list li+li{border-top:1px solid var(--line)}
.side-list a{display:flex;gap:10px;padding:12px 0;font-size:14px;line-height:1.6;color:var(--ink)}
.side-list a:hover{color:var(--brand-600)}
.side-num{font-size:13px;font-weight:600;color:var(--accent);font-variant-numeric:tabular-nums;flex:none;padding-top:1px}
.side-time{display:block;font-size:12px;color:var(--ink-2);margin-top:4px;font-variant-numeric:tabular-nums}
.side-tip{font-size:13px;color:var(--ink-2);line-height:1.7;margin-top:12px;padding-top:12px;border-top:1px solid var(--line)}

/* ============ 文末区块 ============ */
.article-foot{max-width:760px;margin-top:44px}
.article-foot .block-label{font-size:13px;font-weight:600;letter-spacing:.04em;color:var(--ink-2);margin-bottom:12px}
.tag-group{display:flex;flex-wrap:wrap;gap:8px}
.pager{display:grid;grid-template-columns:1fr;gap:14px;margin-top:34px}
@media(min-width:640px){.pager{grid-template-columns:1fr 1fr}}
.pager a{
  display:block;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:18px 20px;box-shadow:var(--shadow-card);transition:all .2s ease;
}
.pager a:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:#CBDDEA}
.pager .pager-dir{font-size:12px;color:var(--accent);font-weight:600;letter-spacing:.04em}
.pager .pager-title{display:block;font-size:15px;font-weight:600;color:var(--ink);margin-top:8px;line-height:1.6}
.pager a:hover .pager-title{color:var(--brand-600)}
.back-row{margin-top:28px}

/* ============ 相关推荐 ============ */
.section{padding:56px 0}
@media(min-width:1024px){.section{padding:80px 0}}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:28px;flex-wrap:wrap}
.section-head h2{font-size:clamp(21px,2.4vw,26px);font-weight:600;color:var(--ink);line-height:1.35}
.section-head p{font-size:14px;color:var(--ink-2);margin-top:6px}
.rule{height:1px;background:var(--line);border:none;margin:0}
.rel-grid{display:grid;grid-template-columns:1fr;gap:20px}
@media(min-width:768px){.rel-grid{grid-template-columns:repeat(3,1fr)}}
.rel-card{
  display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius-card);overflow:hidden;box-shadow:var(--shadow-card);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.rel-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:#CBDDEA}
.rel-thumb{overflow:hidden;background:#EFE9DF}
.rel-thumb img{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:0;transition:transform .3s ease}
.rel-card:hover .rel-thumb img{transform:scale(1.03)}
.rel-body{padding:18px 20px 20px;display:flex;flex-direction:column;gap:10px;flex:1}
.rel-body h3{font-size:16px;font-weight:600;line-height:1.55;color:var(--ink)}
.rel-card:hover .rel-body h3{color:var(--brand-600)}
.rel-body p{font-size:14px;color:var(--ink-2);line-height:1.7;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.rel-meta{display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--ink-2);margin-top:auto;padding-top:6px;font-variant-numeric:tabular-nums}

/* ============ FAQ ============ */
.faq-wrap{max-width:860px}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item:first-child{border-top:1px solid var(--line)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  background:none;border:none;text-align:left;padding:20px 0;font-size:16px;font-weight:600;color:var(--ink);
}
.faq-q:hover{color:var(--brand-600)}
.faq-icon{width:20px;height:20px;flex:none;color:var(--brand-600);transition:transform .2s ease}
.faq-item.open .faq-icon{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .24s ease}
.faq-a p{font-size:15px;line-height:1.8;color:var(--ink-2);max-width:72ch;padding:0 0 20px}

/* ============ CTA 通栏 ============ */
.cta-band{background:var(--brand-900);color:#E9F1F7;padding:44px 0;margin-top:8px}
.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap}
.cta-title{font-size:clamp(19px,2.2vw,23px);font-weight:600;color:#fff;line-height:1.45}
.cta-desc{font-size:14.5px;color:#A9BECC;margin-top:8px;max-width:52ch}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap}
.btn-on-dark{background:transparent;border:1px solid rgba(255,255,255,.55);color:#fff}
.btn-on-dark:hover{background:#fff;color:var(--brand-900);border-color:#fff;transform:translateY(-1px)}
.btn-on-dark:active{transform:translateY(1px)}

/* ============ 页脚 ============ */
.site-footer{background:var(--brand-900);color:#D7E2EC;padding:60px 0 0;margin-top:16px}
.footer-grid{display:grid;grid-template-columns:1fr;gap:32px;padding-bottom:44px}
@media(min-width:640px){.footer-grid{grid-template-columns:1fr 1fr}}
@media(min-width:960px){.footer-grid{grid-template-columns:1.7fr 1fr 1fr 1fr;gap:40px}}
.footer-brand{display:flex;align-items:center;gap:10px;font-size:17px;font-weight:700;color:#fff}
.footer-mark{width:13px;height:13px;border-radius:4px;background:var(--accent);flex:none}
.footer-about{font-size:14px;line-height:1.8;color:#A9BECC;margin-top:14px;max-width:38ch}
.footer-h{font-size:14px;font-weight:600;color:#fff;letter-spacing:.02em;margin-bottom:14px}
.footer-links a{display:block;font-size:14px;color:#A9BECC;padding:5px 0}
.footer-links a:hover{color:var(--accent)}
.footer-note{font-size:13px;color:#8FA7B8;line-height:1.75}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);padding:20px 0;
  display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap;
  font-size:13px;color:#8FA7B8;font-variant-numeric:tabular-nums;
}

/* ============ 移动底部 Tab ============ */
.tabbar{
  display:none;position:fixed;left:0;right:0;bottom:0;z-index:70;
  background:var(--surface);border-top:1px solid var(--line);
  box-shadow:0 -8px 22px -16px rgba(18,59,88,.55);
  padding-bottom:env(safe-area-inset-bottom);
}
.tabbar-inner{display:flex}
.tab-item{
  flex:1;min-height:56px;display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:3px;font-size:12px;color:var(--ink-2);position:relative;padding:6px 2px;letter-spacing:.01em;
}
.tab-item svg{width:20px;height:20px}
.tab-item.active{color:var(--brand-600);font-weight:600}
.tab-item.active::before{
  content:"";position:absolute;top:0;left:50%;transform:translateX(-50%);
  width:20px;height:2px;background:var(--brand-600);border-radius:0 0 2px 2px;
}
@media(max-width:1023px){
  .nav-menu{display:none}
  .nav-cta{display:none}
  .tabbar{display:block}
  body{padding-bottom:calc(88px + env(safe-area-inset-bottom))}
  .logo-sub{display:none}
  .breadcrumb li[aria-current="page"]{white-space:normal}
}
@media(max-width:520px){
  .logo{font-size:16px}
  .cta-actions{width:100%}
  .cta-actions .btn{flex:1 1 auto}
  .article-head{padding-top:18px}
}

/* roulang page: category2 */
:root{
    --brand-900:#123B58;
    --brand-600:#1B5E8C;
    --brand-100:#E7EFF6;
    --accent:#C08A4E;
    --bg:#FAF8F4;
    --surface:#FFFFFF;
    --ink:#1C2430;
    --ink-2:#5A6773;
    --line:#E6E2DA;
    --ok:#3F8F6B;
    --warn:#C0563F;
    --radius-card:14px;
    --radius-img:12px;
    --radius-btn:10px;
    --shadow-sm:0 1px 2px rgba(18,59,88,.06);
    --shadow-lg:0 10px 28px -14px rgba(18,59,88,.28);
  }
  *,*::before,*::after{box-sizing:border-box;}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
  body{
    margin:0;
    font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
    background:var(--bg);
    color:var(--ink);
    font-size:16px;
    line-height:1.8;
    padding-bottom:88px;
    -webkit-font-smoothing:antialiased;
  }
  img{max-width:100%;display:block;}
  a{color:inherit;text-decoration:none;}
  button{font-family:inherit;}
  h1,h2,h3,h4,p,ul,ol,figure{margin:0;padding:0;}
  ul,ol{list-style:none;}
  a:focus-visible,button:focus-visible,input:focus-visible{
    outline:2px solid var(--brand-600);
    outline-offset:2px;
    border-radius:6px;
  }
  .container{width:100%;max-width:1200px;margin:0 auto;padding:0 16px;}
  @media (min-width:768px){.container{padding:0 24px;}}
  @media (min-width:1024px){.container{padding:0 32px;}}
  .section{padding:48px 0;}
  @media (min-width:768px){.section{padding:64px 0;}}
  @media (min-width:1024px){.section{padding:80px 0;}}
  .sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0;}

  /* ---------- header ---------- */
  .site-header{
    position:sticky;top:0;z-index:60;
    background:rgba(250,248,244,.92);
    backdrop-filter:saturate(180%) blur(8px);
    border-bottom:1px solid transparent;
    transition:background 200ms ease-out,box-shadow 200ms ease-out,border-color 200ms ease-out;
  }
  .site-header.is-stuck{
    background:#fff;
    border-bottom-color:var(--line);
    box-shadow:0 6px 18px -14px rgba(18,59,88,.35);
  }
  .nav-wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;height:66px;}
  @media (min-width:1024px){.nav-wrap{height:72px;}}
  .logo{display:inline-flex;align-items:center;gap:9px;font-size:17px;font-weight:700;color:var(--brand-900);letter-spacing:.01em;}
  .logo-mark{width:18px;height:18px;border-radius:5px;background:linear-gradient(135deg,var(--brand-600),var(--brand-900));box-shadow:inset 0 0 0 2px rgba(255,255,255,.55);flex:none;}
  .logo-sub{font-size:12px;font-weight:500;color:var(--ink-2);letter-spacing:.04em;}
  @media (max-width:400px){.logo-sub{display:none;}}
  .nav-menu{display:none;}
  @media (min-width:1024px){
    .nav-menu{display:flex;align-items:center;gap:6px;}
  }
  .nav-link{
    position:relative;display:inline-block;padding:8px 12px;
    font-size:15px;font-weight:500;color:var(--ink-2);
    border-radius:8px;transition:color 180ms ease-out,background 180ms ease-out;
  }
  .nav-link::after{
    content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;
    background:var(--brand-600);border-radius:2px;
    transform:scaleX(0);transform-origin:left center;
    transition:transform 180ms ease-out;
  }
  .nav-link:hover{color:var(--brand-900);background:var(--brand-100);}
  .nav-link:hover::after{transform:scaleX(1);}
  .nav-link.active{color:var(--brand-600);font-weight:600;}
  .nav-link.active::after{transform:scaleX(1);}
  .nav-actions{display:flex;align-items:center;gap:10px;}
  .icon-btn{
    width:40px;height:40px;display:inline-flex;align-items:center;justify-content:center;
    background:var(--surface);border:1px solid var(--line);border-radius:999px;
    color:var(--brand-900);cursor:pointer;
    transition:border-color 180ms ease-out,background 180ms ease-out,transform 180ms ease-out;
  }
  .icon-btn:hover{border-color:var(--brand-600);background:var(--brand-100);}
  .icon-btn:active{transform:translateY(1px);}
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    padding:11px 20px;border-radius:var(--radius-btn);
    font-size:15px;font-weight:600;line-height:1.2;cursor:pointer;
    border:1px solid transparent;white-space:nowrap;
    transition:background 200ms ease-out,color 200ms ease-out,border-color 200ms ease-out,transform 200ms ease-out,box-shadow 200ms ease-out;
  }
  .btn:active{transform:translateY(1px);}
  .btn-primary{background:var(--brand-600);color:#fff;border-color:var(--brand-600);box-shadow:var(--shadow-sm);}
  .btn-primary:hover{background:var(--brand-900);border-color:var(--brand-900);box-shadow:var(--shadow-lg);}
  .btn-ghost{background:var(--surface);color:var(--brand-600);border-color:var(--brand-600);}
  .btn-ghost:hover{background:var(--brand-100);color:var(--brand-900);border-color:var(--brand-900);}
  .btn-light{background:transparent;color:#fff;border-color:rgba(255,255,255,.55);}
  .btn-light:hover{background:#fff;color:var(--brand-900);border-color:#fff;}
  .nav-cta{display:none;}
  @media (min-width:640px){.nav-cta{display:inline-flex;}}
  .search-row{display:none;border-top:1px solid var(--line);background:#fff;}
  .search-row.open{display:block;}
  .search-inner{display:flex;flex-wrap:wrap;align-items:center;gap:12px;padding:16px 0;}
  .search-input{
    flex:1 1 240px;height:44px;padding:0 14px;
    border:1px solid var(--line);border-radius:var(--radius-btn);
    background:var(--surface);color:var(--ink);font-size:15px;
    transition:border-color 180ms ease-out,box-shadow 180ms ease-out;
  }
  .search-input:focus{outline:none;border-color:var(--brand-600);box-shadow:0 0 0 3px rgba(27,94,140,.12);}
  .search-hint{font-size:13px;color:var(--ink-2);}

  /* ---------- page head ---------- */
  .page-head{padding:28px 0 8px;}
  .breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--ink-2);}
  .breadcrumb a{color:var(--ink-2);transition:color 160ms ease-out;}
  .breadcrumb a:hover{color:var(--brand-600);}
  .breadcrumb .sep{color:#BEB9AF;}
  .page-head-grid{display:grid;grid-template-columns:1fr;gap:24px;margin-top:18px;align-items:center;}
  @media (min-width:900px){
    .page-head-grid{grid-template-columns:1fr 320px;gap:48px;margin-top:24px;}
  }
  .kicker{
    display:inline-flex;align-items:center;gap:8px;
    padding:5px 12px;border-radius:999px;background:var(--brand-100);
    color:var(--brand-900);font-size:12px;font-weight:600;letter-spacing:.02em;
  }
  .kicker .dot{width:6px;height:6px;border-radius:999px;background:var(--accent);}
  .page-title{
    margin-top:14px;
    font-size:clamp(28px,4vw,40px);line-height:1.25;font-weight:700;
    color:var(--brand-900);letter-spacing:.01em;
  }
  .title-underline{width:56px;height:4px;border-radius:999px;background:var(--accent);margin:14px 0 16px;}
  .page-lead{font-size:16px;color:var(--ink-2);max-width:60ch;}
  .head-media{
    position:relative;aspect-ratio:16/10;border-radius:var(--radius-img);overflow:hidden;
    border:1px solid var(--line);box-shadow:var(--shadow-sm);background:var(--brand-100);
  }
  .head-media img{width:100%;height:100%;object-fit:cover;}
  @media (max-width:899px){.head-media{aspect-ratio:16/9;}}

  /* ---------- anchor bar ---------- */
  .anchor-bar-wrap{margin-top:26px;}
  .anchor-bar{
    display:flex;gap:10px;overflow-x:auto;padding:6px 0 10px;
    scrollbar-width:none;-ms-overflow-style:none;
  }
  .anchor-bar::-webkit-scrollbar{display:none;}
  .anchor-pill{
    flex:none;display:inline-flex;align-items:center;gap:8px;
    padding:9px 16px;border-radius:999px;
    background:var(--surface);border:1px solid var(--line);
    color:var(--ink-2);font-size:14px;font-weight:500;
    transition:color 180ms ease-out,border-color 180ms ease-out,background 180ms ease-out,transform 180ms ease-out;
  }
  .anchor-pill:hover{color:var(--brand-900);border-color:var(--brand-600);background:var(--brand-100);transform:translateY(-1px);}
  .anchor-pill .num{font-variant-numeric:tabular-nums;color:var(--accent);font-weight:700;font-size:13px;}

  /* ---------- section heading ---------- */
  .sec-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:14px;margin-bottom:28px;}
  .sec-title{
    position:relative;padding-left:14px;
    font-size:26px;line-height:1.35;font-weight:600;color:var(--brand-900);
  }
  .sec-title::before{
    content:"";position:absolute;left:0;top:6px;bottom:6px;width:4px;border-radius:999px;background:var(--brand-600);
  }
  .sec-desc{font-size:14px;color:var(--ink-2);margin-top:8px;padding-left:14px;max-width:64ch;}
  .text-link{display:inline-flex;align-items:center;gap:6px;color:var(--brand-600);font-size:14px;font-weight:600;}
  .text-link .arw{transition:transform 180ms ease-out;}
  .text-link:hover{color:var(--brand-900);}
  .text-link:hover .arw{transform:translateX(4px);}

  /* ---------- badges ---------- */
  .badge{
    display:inline-flex;align-items:center;
    padding:4px 10px;border-radius:999px;
    font-size:12px;font-weight:500;line-height:1;letter-spacing:.02em;
    background:var(--brand-100);color:var(--brand-900);
  }
  .badge-accent{background:rgba(192,138,78,.14);color:#8A5E28;}
  .badge-outline{background:transparent;border:1px solid var(--line);color:var(--ink-2);}

  /* ---------- data card grid ---------- */
  .data-grid{display:grid;grid-template-columns:1fr;gap:22px;}
  @media (min-width:768px){.data-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:26px;}}
  .data-card{
    background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
    box-shadow:var(--shadow-sm);overflow:hidden;
    transition:box-shadow 200ms ease-out,transform 200ms ease-out,border-color 200ms ease-out;
  }
  .data-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-2px);border-color:#D8D2C6;}
  .data-card-link{display:block;height:100%;}
  .data-card-media{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--brand-100);}
  .data-card-media img{width:100%;height:100%;object-fit:cover;transition:transform 400ms ease-out;}
  .data-card:hover .data-card-media img{transform:scale(1.03);}
  .data-card-media .badge{position:absolute;left:14px;top:14px;box-shadow:0 2px 10px rgba(18,59,88,.12);}
  .data-card-body{padding:20px 22px 22px;}
  @media (min-width:768px){.data-card-body{padding:22px 24px 24px;}}
  .data-card-title{font-size:19px;line-height:1.5;font-weight:600;color:var(--ink);transition:color 180ms ease-out;}
  .data-card:hover .data-card-title{color:var(--brand-600);}
  .data-card-text{
    margin-top:10px;font-size:14px;line-height:1.7;color:var(--ink-2);
    display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  }
  .data-card-meta{
    margin-top:18px;padding-top:14px;border-top:1px solid var(--line);
    display:flex;align-items:center;justify-content:space-between;gap:12px;
    font-size:13px;color:var(--ink-2);
  }
  .data-card-meta .meta-left{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-variant-numeric:tabular-nums;}
  .data-card-meta .meta-left .bar{width:1px;height:12px;background:var(--line);}
  .arrow-btn{
    flex:none;width:34px;height:34px;display:inline-flex;align-items:center;justify-content:center;
    border-radius:999px;border:1px solid var(--line);color:var(--brand-600);background:var(--surface);
    transition:background 180ms ease-out,color 180ms ease-out,border-color 180ms ease-out,transform 180ms ease-out;
  }
  .data-card:hover .arrow-btn{background:var(--brand-600);border-color:var(--brand-600);color:#fff;transform:translateX(3px);}

  /* ---------- scope section ---------- */
  .scope-wrap{
    background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
    box-shadow:var(--shadow-sm);padding:24px;
  }
  @media (min-width:768px){.scope-wrap{padding:32px;}}
  .stat-row{display:grid;grid-template-columns:1fr;gap:16px;margin-bottom:26px;}
  @media (min-width:640px){.stat-row{grid-template-columns:repeat(3,minmax(0,1fr));}}
  .stat-cell{
    background:var(--bg);border:1px solid var(--line);border-radius:12px;padding:16px 18px;
  }
  .stat-num{font-size:26px;font-weight:700;color:var(--brand-900);font-variant-numeric:tabular-nums;line-height:1.2;}
  .stat-num span{font-size:14px;font-weight:500;color:var(--ink-2);margin-left:4px;}
  .stat-label{margin-top:6px;font-size:13px;color:var(--ink-2);}
  .table-scroll{overflow-x:auto;border:1px solid var(--line);border-radius:12px;}
  table.metric-table{width:100%;border-collapse:collapse;min-width:560px;font-size:14px;}
  table.metric-table th,table.metric-table td{
    padding:13px 16px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top;
  }
  table.metric-table thead th{background:var(--brand-100);color:var(--brand-900);font-weight:600;font-size:13px;letter-spacing:.02em;}
  table.metric-table tbody tr:last-child td{border-bottom:none;}
  table.metric-table tbody tr{transition:background 160ms ease-out;}
  table.metric-table tbody tr:hover{background:#FBF7F0;}
  table.metric-table td:first-child{font-weight:600;color:var(--ink);}
  table.metric-table td{color:var(--ink-2);}
  .table-note{margin-top:12px;font-size:13px;color:var(--ink-2);}

  /* ---------- recommend pills ---------- */
  .pill-cloud{display:flex;flex-wrap:wrap;gap:10px;}
  .pill{
    display:inline-flex;align-items:center;gap:8px;
    padding:10px 16px;border-radius:999px;
    background:var(--surface);border:1px solid var(--line);
    font-size:14px;color:var(--ink-2);
    transition:color 180ms ease-out,border-color 180ms ease-out,background 180ms ease-out,transform 180ms ease-out;
  }
  .pill:hover{color:var(--brand-900);border-color:var(--brand-600);background:var(--brand-100);transform:translateY(-2px);}
  .pill .pnum{font-variant-numeric:tabular-nums;font-size:12px;color:var(--accent);font-weight:700;}

  /* ---------- FAQ ---------- */
  .faq-list{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);box-shadow:var(--shadow-sm);overflow:hidden;}
  .faq-item + .faq-item{border-top:1px solid var(--line);}
  .faq-q{
    width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
    padding:20px 22px;background:transparent;border:none;cursor:pointer;text-align:left;
    font-size:16px;font-weight:600;color:var(--ink);
    transition:background 180ms ease-out,color 180ms ease-out;
  }
  .faq-q:hover{background:#FBF7F0;color:var(--brand-900);}
  .faq-icon{
    flex:none;width:20px;height:20px;position:relative;color:var(--brand-600);
    transition:transform 200ms ease-out;
  }
  .faq-icon::before,.faq-icon::after{
    content:"";position:absolute;background:currentColor;border-radius:2px;
  }
  .faq-icon::before{left:0;right:0;top:9px;height:2px;}
  .faq-icon::after{top:0;bottom:0;left:9px;width:2px;transition:opacity 200ms ease-out;}
  .faq-item.open .faq-icon{transform:rotate(45deg);}
  .faq-panel{max-height:0;overflow:hidden;transition:max-height 240ms ease-out;}
  .faq-a{padding:0 22px 22px;font-size:15px;line-height:1.8;color:var(--ink-2);max-width:72ch;}

  /* ---------- CTA band ---------- */
  .cta-band{background:var(--brand-900);border-radius:var(--radius-card);padding:28px 24px;color:#fff;}
  @media (min-width:768px){.cta-band{padding:36px 40px;}}
  .cta-inner{display:grid;grid-template-columns:1fr;gap:22px;align-items:center;}
  @media (min-width:900px){.cta-inner{grid-template-columns:1fr auto;gap:40px;}}
  .cta-title{font-size:22px;font-weight:600;line-height:1.4;color:#fff;}
  .cta-text{margin-top:8px;font-size:14px;line-height:1.8;color:rgba(255,255,255,.72);max-width:62ch;}
  .cta-actions{display:flex;flex-wrap:wrap;gap:12px;}

  /* ---------- footer ---------- */
  .site-footer{background:var(--brand-900);color:rgba(255,255,255,.75);margin-top:56px;padding:48px 0 0;}
  .footer-grid{display:grid;grid-template-columns:1fr;gap:32px;padding-bottom:36px;}
  @media (min-width:640px){.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));}}
  @media (min-width:1024px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;}}
  .footer-brand{display:inline-flex;align-items:center;gap:9px;font-size:17px;font-weight:700;color:#fff;}
  .footer-mark{width:18px;height:18px;border-radius:5px;background:var(--accent);flex:none;}
  .footer-about{margin-top:14px;font-size:14px;line-height:1.8;color:rgba(255,255,255,.7);max-width:38ch;}
  .footer-h{font-size:14px;font-weight:600;color:#fff;letter-spacing:.04em;margin-bottom:14px;}
  .footer-links{display:flex;flex-direction:column;gap:10px;font-size:14px;}
  .footer-links a{color:rgba(255,255,255,.72);transition:color 180ms ease-out,padding-left 180ms ease-out;}
  .footer-links a:hover{color:var(--accent);padding-left:4px;}
  .footer-note{font-size:13px;line-height:1.8;color:rgba(255,255,255,.6);}
  .footer-bottom{
    border-top:1px solid rgba(255,255,255,.14);
    padding:18px 0 24px;display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
    font-size:13px;color:rgba(255,255,255,.6);
  }

  /* ---------- mobile tab ---------- */
  .tabbar{
    position:fixed;left:0;right:0;bottom:0;z-index:80;
    display:grid;grid-template-columns:repeat(5,1fr);
    background:#fff;border-top:1px solid var(--line);
    box-shadow:0 -6px 18px -14px rgba(18,59,88,.4);
    padding-bottom:env(safe-area-inset-bottom,0px);
  }
  @media (min-width:1024px){.tabbar{display:none;}}
  .tab-item{
    min-height:56px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;
    font-size:12px;color:var(--ink-2);position:relative;padding:6px 2px;
    transition:color 180ms ease-out;
  }
  .tab-item svg{width:20px;height:20px;}
  .tab-item .tab-bar{
    position:absolute;top:4px;width:16px;height:2px;border-radius:2px;background:transparent;
    transition:background 180ms ease-out;
  }
  .tab-item.active{color:var(--brand-600);font-weight:600;}
  .tab-item.active .tab-bar{background:var(--brand-600);}

  /* ---------- toast ---------- */
  .toast{
    position:fixed;left:50%;bottom:104px;transform:translate(-50%,12px);
    background:var(--brand-900);color:#fff;font-size:14px;
    padding:10px 18px;border-radius:999px;box-shadow:var(--shadow-lg);
    opacity:0;pointer-events:none;transition:opacity 200ms ease-out,transform 200ms ease-out;z-index:90;
  }
  .toast.show{opacity:1;transform:translate(-50%,0);}
  @media (min-width:1024px){.toast{bottom:40px;}}

/* roulang page: category3 */
:root{
  --brand-900:#123B58;
  --brand-600:#1B5E8C;
  --brand-100:#E7EFF6;
  --accent:#C08A4E;
  --bg:#FAF8F4;
  --surface:#FFFFFF;
  --ink:#1C2430;
  --ink-2:#5A6773;
  --line:#E6E2DA;
  --ok:#3F8F6B;
  --warn:#C0563F;
  --radius-card:14px;
  --radius-img:12px;
  --radius-btn:10px;
  --shadow-card:0 1px 2px rgba(18,59,88,.06);
  --shadow-hover:0 10px 28px -14px rgba(18,59,88,.28);
  --ease:200ms ease-out;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-style:none;}
a{color:inherit;text-decoration:none;}
button{font-family:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{
  outline:2px solid var(--brand-600);
  outline-offset:2px;
  border-radius:6px;
}
.num{font-variant-numeric:tabular-nums;}

/* ---------- 容器 ---------- */
.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding-left:16px;
  padding-right:16px;
}
@media(min-width:768px){.container{padding-left:24px;padding-right:24px;}}
@media(min-width:1024px){.container{padding-left:32px;padding-right:32px;}}

/* ---------- 头部导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:var(--surface);
  border-bottom:1px solid var(--line);
  transition:box-shadow var(--ease);
}
.site-header.is-scrolled{box-shadow:0 6px 20px -14px rgba(18,59,88,.45);}
.nav-wrap{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  height:64px;
}
@media(min-width:1024px){.nav-wrap{height:72px;}}
.logo{
  display:inline-flex;
  align-items:center;
  gap:9px;
  font-size:16px;
  font-weight:700;
  color:var(--brand-900);
  letter-spacing:.01em;
  white-space:nowrap;
}
.logo-mark{
  width:20px;height:20px;border-radius:6px;
  background:linear-gradient(135deg,var(--brand-600),var(--brand-900));
  display:inline-block;flex:none;
}
.logo-sub{
  font-size:12px;
  font-weight:500;
  color:var(--ink-2);
  letter-spacing:.02em;
}
@media(max-width:639px){.logo-sub{display:none;}}
.nav-menu{display:none;}
@media(min-width:1024px){
  .nav-menu{display:flex;align-items:center;gap:6px;}
  .nav-link{
    position:relative;
    display:inline-block;
    padding:8px 11px;
    font-size:15px;
    color:var(--ink-2);
    transition:color var(--ease);
  }
  .nav-link::after{
    content:"";
    position:absolute;
    left:11px;right:11px;bottom:2px;
    height:2px;
    background:var(--brand-600);
    transform:scaleX(0);
    transform-origin:left center;
    transition:transform 180ms ease-out;
  }
  .nav-link:hover{color:var(--brand-900);}
  .nav-link:hover::after{transform:scaleX(1);}
  .nav-link.active{color:var(--brand-900);font-weight:600;}
  .nav-link.active::after{transform:scaleX(1);}
}
.nav-actions{display:flex;align-items:center;gap:10px;}
.icon-btn{
  width:40px;height:40px;
  display:inline-flex;align-items:center;justify-content:center;
  border-radius:999px;
  border:1px solid var(--line);
  background:var(--surface);
  color:var(--ink-2);
  cursor:pointer;
  transition:color var(--ease),border-color var(--ease),background var(--ease);
}
.icon-btn:hover{color:var(--brand-600);border-color:var(--brand-600);background:var(--brand-100);}
.nav-cta{display:none;}
@media(min-width:1024px){.nav-cta{display:inline-flex;}}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:7px;
  padding:11px 20px;
  min-height:44px;
  border-radius:var(--radius-btn);
  font-size:15px;
  font-weight:600;
  line-height:1.2;
  border:1px solid transparent;
  cursor:pointer;
  transition:background var(--ease),color var(--ease),transform var(--ease),border-color var(--ease),box-shadow var(--ease);
  text-align:center;
}
.btn:active{transform:translateY(1px);}
.btn-primary{background:var(--brand-600);color:#fff;}
.btn-primary:hover{background:var(--brand-900);transform:translateY(-1px);box-shadow:var(--shadow-hover);}
.btn-ghost{background:var(--surface);color:var(--brand-600);border-color:var(--brand-600);}
.btn-ghost:hover{background:var(--brand-100);transform:translateY(-1px);}
.btn-light{background:transparent;color:#fff;border-color:rgba(255,255,255,.55);}
.btn-light:hover{background:#fff;color:var(--brand-900);border-color:#fff;}
.btn-arrow{padding:0;min-height:auto;background:none;border:none;color:var(--brand-600);font-size:14px;font-weight:600;}
.btn-arrow:hover{color:var(--brand-900);}

/* ---------- 搜索行 ---------- */
.search-row{
  display:none;
  border-top:1px solid var(--line);
  background:var(--surface);
  padding:14px 0 16px;
}
.search-row.is-open{display:block;}
.search-inner{display:flex;flex-wrap:wrap;gap:10px;align-items:center;}
.search-input{
  flex:1 1 220px;
  height:44px;
  padding:0 14px;
  border-radius:var(--radius-btn);
  border:1px solid var(--line);
  background:var(--bg);
  color:var(--ink);
  font-size:15px;
  transition:border-color var(--ease),box-shadow var(--ease),background var(--ease);
}
.search-input::placeholder{color:#98A2AC;}
.search-input:focus{
  outline:none;
  background:var(--surface);
  border-color:var(--brand-600);
  box-shadow:0 0 0 3px rgba(27,94,140,.12);
}
.search-hint{font-size:13px;color:var(--ink-2);}

/* ---------- 页头 ---------- */
.page-hero{padding:32px 0 36px;border-bottom:1px solid var(--line);}
@media(min-width:1024px){.page-hero{padding:44px 0 52px;}}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--ink-2);margin-bottom:18px;}
.breadcrumb a{transition:color var(--ease);}
.breadcrumb a:hover{color:var(--brand-600);}
.breadcrumb .sep{color:#B9C0C6;}
.hero-grid{display:grid;gap:28px;align-items:center;}
@media(min-width:900px){.hero-grid{grid-template-columns:7fr 5fr;gap:44px;}}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12px;font-weight:500;letter-spacing:.02em;
  padding:5px 12px;border-radius:999px;
  background:var(--brand-100);color:var(--brand-900);
  line-height:1;
}
.badge-accent{background:rgba(192,138,78,.14);color:#8A5D2A;}
.page-hero h1{
  font-size:clamp(28px,4vw,40px);
  line-height:1.25;
  font-weight:700;
  letter-spacing:-.01em;
  margin:16px 0 0;
  color:var(--brand-900);
}
.title-rule{
  width:64px;height:4px;border-radius:2px;
  background:var(--accent);
  margin:14px 0 0;
}
.page-hero .lead{
  margin-top:16px;
  font-size:16px;
  line-height:1.85;
  color:var(--ink-2);
  max-width:60ch;
}
.hero-meta{display:flex;flex-wrap:wrap;align-items:center;gap:8px 18px;margin-top:20px;font-size:13px;color:var(--ink-2);}
.hero-meta .dot{width:5px;height:5px;border-radius:50%;background:var(--accent);display:inline-block;}
.hero-figure{
  border-radius:var(--radius-img);
  overflow:hidden;
  border:1px solid var(--line);
  background:var(--surface);
  box-shadow:var(--shadow-card);
}
.hero-figure img{width:100%;height:100%;object-fit:cover;aspect-ratio:16/11;}

/* ---------- 锚点胶囊 ---------- */
.anchor-bar{
  position:sticky;top:64px;z-index:40;
  background:rgba(250,248,244,.94);
  backdrop-filter:blur(6px);
  border-bottom:1px solid var(--line);
  padding:12px 0;
}
@media(min-width:1024px){.anchor-bar{top:72px;}}
.anchor-scroll{
  display:flex;gap:10px;overflow-x:auto;
  scrollbar-width:none;
  -ms-overflow-style:none;
  padding-bottom:2px;
}
.anchor-scroll::-webkit-scrollbar{display:none;}
.anchor-pill{
  flex:none;
  display:inline-flex;align-items:center;gap:6px;
  padding:8px 14px;
  border-radius:999px;
  border:1px solid var(--line);
  background:var(--surface);
  font-size:14px;
  color:var(--ink-2);
  white-space:nowrap;
  transition:all var(--ease);
}
.anchor-pill .idx{font-size:12px;color:var(--accent);font-variant-numeric:tabular-nums;}
.anchor-pill:hover{border-color:var(--brand-600);color:var(--brand-900);background:var(--brand-100);transform:translateY(-1px);}
.anchor-pill.is-active{background:var(--brand-600);border-color:var(--brand-600);color:#fff;}
.anchor-pill.is-active .idx{color:#F4DCB8;}

/* ---------- 板块通用 ---------- */
.section{padding:48px 0;}
@media(min-width:1024px){.section{padding:80px 0;}}
.section-head{margin-bottom:28px;}
@media(min-width:1024px){.section-head{margin-bottom:40px;}}
.eyebrow{
  display:inline-block;
  font-size:12px;font-weight:600;letter-spacing:.14em;
  color:var(--accent);
  text-transform:uppercase;
  margin-bottom:10px;
}
.section-head h2{
  font-size:26px;
  line-height:1.35;
  font-weight:600;
  color:var(--brand-900);
  position:relative;
  padding-left:14px;
}
.section-head h2::before{
  content:"";
  position:absolute;left:0;top:.28em;
  width:4px;height:20px;border-radius:2px;
  background:var(--brand-600);
}
.section-head p{margin-top:10px;color:var(--ink-2);font-size:15px;max-width:74ch;}

/* ---------- 时间轴 ---------- */
.timeline{position:relative;margin-top:8px;}
.tl-item{
  position:relative;
  padding:0 0 40px 40px;
}
.tl-item:last-child{padding-bottom:0;}
.tl-item::before{
  content:"";
  position:absolute;
  left:10px;top:24px;bottom:0;
  width:2px;
  background:linear-gradient(180deg,var(--line),rgba(230,226,218,.35));
}
.tl-item:last-child::before{display:none;}
.tl-node{
  position:absolute;
  left:0;top:4px;
  width:22px;height:22px;
  border-radius:50%;
  background:var(--brand-600);
  border:3px solid var(--bg);
  box-shadow:0 0 0 1px rgba(27,94,140,.28);
  transition:transform var(--ease),background var(--ease);
}
.tl-item:hover .tl-node{transform:scale(1.15);background:var(--brand-900);}
.tl-card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-card);
  padding:20px 22px;
  transition:box-shadow var(--ease),transform var(--ease),border-color var(--ease);
}
@media(min-width:768px){.tl-card{padding:24px 26px;}}
.tl-card:hover{box-shadow:var(--shadow-hover);transform:translateY(-2px);border-color:#D8E3EC;}
.tl-top{display:flex;flex-wrap:wrap;align-items:center;gap:10px 14px;}
.tl-no{
  font-size:22px;font-weight:700;
  color:var(--accent);
  font-variant-numeric:tabular-nums;
  line-height:1;
}
.tl-card h3{font-size:19px;font-weight:600;line-height:1.5;color:var(--brand-900);}
.tl-card .tl-desc{
  margin-top:10px;
  font-size:15px;
  color:var(--ink-2);
  line-height:1.8;
}
.tl-points{
  margin-top:14px;
  display:grid;
  gap:8px;
}
@media(min-width:768px){.tl-points{grid-template-columns:1fr 1fr;gap:8px 24px;}}
.tl-points li{
  position:relative;
  padding-left:16px;
  font-size:14px;
  color:var(--ink);
  line-height:1.7;
}
.tl-points li::before{
  content:"";
  position:absolute;
  left:0;top:.72em;
  width:6px;height:6px;
  border-radius:2px;
  background:var(--accent);
  transform:rotate(45deg);
}
.tl-foot{
  margin-top:16px;
  padding-top:14px;
  border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;align-items:center;gap:10px 14px;
  font-size:13px;color:var(--ink-2);
}
.tl-tag{
  font-size:12px;padding:4px 10px;border-radius:999px;
  background:var(--brand-100);color:var(--brand-900);
  line-height:1.2;
}

/* ---------- 清单说明 ---------- */
.checklist{
  display:grid;gap:16px;
}
@media(min-width:700px){.checklist{grid-template-columns:1fr 1fr;}}
.check-item{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:20px;
  box-shadow:var(--shadow-card);
  transition:box-shadow var(--ease),transform var(--ease);
}
.check-item:hover{box-shadow:var(--shadow-hover);transform:translateY(-2px);}
.check-item h3{font-size:16px;font-weight:600;color:var(--brand-900);display:flex;align-items:center;gap:9px;}
.check-item h3 .k{
  width:24px;height:24px;flex:none;border-radius:8px;
  background:var(--brand-100);color:var(--brand-600);
  display:inline-flex;align-items:center;justify-content:center;
  font-size:12px;font-weight:700;
}
.check-item p{margin-top:10px;font-size:14px;color:var(--ink-2);line-height:1.8;}

/* ---------- 相关推荐 ---------- */
.rel-scroll{
  display:flex;gap:16px;
  overflow-x:auto;
  padding:4px 2px 12px;
  scrollbar-width:none;
  -ms-overflow-style:none;
  scroll-snap-type:x mandatory;
}
.rel-scroll::-webkit-scrollbar{display:none;}
.rel-card{
  flex:0 0 260px;
  scroll-snap-align:start;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  overflow:hidden;
  box-shadow:var(--shadow-card);
  transition:box-shadow var(--ease),transform var(--ease);
  display:flex;flex-direction:column;
}
@media(min-width:768px){.rel-card{flex:0 0 300px;}}
.rel-card:hover{box-shadow:var(--shadow-hover);transform:translateY(-2px);}
.rel-card img{width:100%;aspect-ratio:16/9;object-fit:cover;}
.rel-body{padding:16px 18px 18px;}
.rel-body h3{font-size:16px;font-weight:600;line-height:1.5;color:var(--brand-900);transition:color var(--ease);}
.rel-card:hover h3{color:var(--brand-600);}
.rel-body p{margin-top:8px;font-size:13px;color:var(--ink-2);line-height:1.7;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.rel-meta{margin-top:12px;font-size:12px;color:var(--ink-2);display:flex;align-items:center;gap:8px;}

/* ---------- FAQ ---------- */
.faq-list{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);box-shadow:var(--shadow-card);overflow:hidden;}
.faq-item{border-bottom:1px solid var(--line);}
.faq-item:last-child{border-bottom:none;}
.faq-q{
  width:100%;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 20px;
  background:none;border:none;
  text-align:left;
  font-size:16px;font-weight:600;color:var(--ink);
  cursor:pointer;
  transition:color var(--ease),background var(--ease);
}
@media(min-width:768px){.faq-q{padding:20px 24px;}}
.faq-q:hover{color:var(--brand-600);background:rgba(231,239,246,.45);}
.faq-icon{
  flex:none;width:20px;height:20px;
  position:relative;
  transition:transform var(--ease);
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;left:50%;top:50%;
  background:var(--brand-600);
  border-radius:2px;
  transform:translate(-50%,-50%);
}
.faq-icon::before{width:14px;height:2px;}
.faq-icon::after{width:2px;height:14px;}
.faq-item.is-open .faq-icon{transform:rotate(45deg);}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height 240ms ease-out;
}
.faq-a-inner{
  padding:0 20px 20px;
  font-size:15px;
  line-height:1.8;
  color:var(--ink-2);
  max-width:72ch;
}
@media(min-width:768px){.faq-a-inner{padding:0 24px 22px;}}

/* ---------- CTA ---------- */
.cta-band{
  background:var(--brand-900);
  border-radius:var(--radius-card);
  padding:28px 22px;
  display:grid;gap:20px;
  align-items:center;
}
@media(min-width:900px){
  .cta-band{grid-template-columns:1fr auto;padding:40px 44px;gap:32px;}
}
.cta-band h2{font-size:22px;font-weight:600;color:#fff;line-height:1.4;}
.cta-band p{margin-top:10px;font-size:14px;color:rgba(255,255,255,.72);line-height:1.8;max-width:62ch;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--brand-900);
  color:rgba(255,255,255,.72);
  padding:48px 0 0;
  margin-top:48px;
}
@media(min-width:1024px){.site-footer{padding:64px 0 0;margin-top:80px;}}
.footer-grid{display:grid;gap:32px;}
@media(min-width:640px){.footer-grid{grid-template-columns:1fr 1fr;gap:36px;}}
@media(min-width:1024px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;}}
.footer-brand{display:flex;align-items:center;gap:9px;font-size:16px;font-weight:700;color:#fff;}
.footer-mark{width:20px;height:20px;border-radius:6px;background:var(--accent);display:inline-block;flex:none;}
.footer-about{margin-top:14px;font-size:14px;line-height:1.8;color:rgba(255,255,255,.62);max-width:34ch;}
.footer-h{font-size:14px;font-weight:600;color:#fff;letter-spacing:.04em;margin-bottom:14px;}
.footer-links{display:grid;gap:10px;font-size:14px;}
.footer-links a{color:rgba(255,255,255,.68);transition:color var(--ease);}
.footer-links a:hover{color:var(--accent);}
.footer-note{font-size:13px;line-height:1.8;color:rgba(255,255,255,.55);}
.footer-bottom{
  margin-top:36px;
  border-top:1px solid rgba(255,255,255,.14);
  padding:18px 0 22px;
  display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;
  font-size:13px;color:rgba(255,255,255,.5);
}

/* ---------- 移动底部 Tab ---------- */
.mobile-tabs{display:none;}
@media(max-width:1023px){
  body{padding-bottom:calc(76px + env(safe-area-inset-bottom));}
  .mobile-tabs{
    display:flex;
    position:fixed;
    left:0;right:0;bottom:0;
    z-index:70;
    background:var(--surface);
    border-top:1px solid var(--line);
    box-shadow:0 -6px 20px -16px rgba(18,59,88,.5);
    padding-bottom:env(safe-area-inset-bottom);
  }
  .tab-item{
    flex:1;
    min-height:56px;
    display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;
    font-size:11px;
    color:var(--ink-2);
    position:relative;
    transition:color var(--ease);
  }
  .tab-item svg{width:20px;height:20px;}
  .tab-item::before{
    content:"";
    position:absolute;top:6px;
    width:16px;height:2px;border-radius:2px;
    background:var(--brand-600);
    opacity:0;
    transition:opacity var(--ease);
  }
  .tab-item.active{color:var(--brand-600);font-weight:600;}
  .tab-item.active::before{opacity:1;}
  .tab-item:active{background:var(--brand-100);}
}

/* 小节分隔 */
.hr-line{height:1px;background:var(--line);border:none;margin:0;}

/* 内容区安全距离 */
.main-wrap{padding-bottom:8px;}

/* roulang page: category4 */
:root{
  --brand-900:#123B58;
  --brand-600:#1B5E8C;
  --brand-100:#E7EFF6;
  --accent:#C08A4E;
  --bg:#FAF8F4;
  --surface:#FFFFFF;
  --ink:#1C2430;
  --ink-2:#5A6773;
  --line:#E6E2DA;
  --ok:#3F8F6B;
  --warn:#C0563F;
  --radius-card:14px;
  --radius-img:12px;
  --radius-btn:10px;
  --shadow-card:0 1px 2px rgba(18,59,88,.06);
  --shadow-hover:0 10px 28px -14px rgba(18,59,88,.28);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button{font-family:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
:focus-visible{outline:2px solid var(--brand-600);outline-offset:2px;border-radius:4px;}
.container{width:100%;max-width:1200px;margin:0 auto;padding-left:16px;padding-right:16px;}
@media (min-width:768px){.container{padding-left:24px;padding-right:24px;}}
@media (min-width:1024px){.container{padding-left:32px;padding-right:32px;}}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(255,255,255,.94);
  backdrop-filter:saturate(160%) blur(10px);
  -webkit-backdrop-filter:saturate(160%) blur(10px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .22s ease-out,background .22s ease-out;
}
.site-header.is-scrolled{box-shadow:0 8px 24px -18px rgba(18,59,88,.45);}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;gap:20px;height:72px;}
.logo{display:inline-flex;align-items:center;gap:10px;font-size:17px;font-weight:700;letter-spacing:.01em;color:var(--ink);}
.logo-mark{
  position:relative;width:20px;height:20px;border-radius:6px;
  background:linear-gradient(150deg,var(--brand-600),var(--brand-900));
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.28);
  flex:0 0 auto;
}
.logo-mark::after{
  content:"";position:absolute;right:-3px;bottom:-3px;width:8px;height:8px;
  border-radius:2px;background:var(--accent);
}
.logo-sub{font-size:13px;font-weight:500;color:var(--ink-2);letter-spacing:.02em;}
.nav-menu{display:none;align-items:center;gap:2px;}
@media (min-width:1024px){.nav-menu{display:flex;}}
.nav-link{
  position:relative;display:inline-block;padding:10px 14px;border-radius:8px;
  font-size:15px;font-weight:500;color:var(--ink-2);
  transition:color .18s ease-out,background .18s ease-out;
}
.nav-link::after{
  content:"";position:absolute;left:14px;right:14px;bottom:4px;height:2px;
  background:var(--brand-600);border-radius:2px;
  transform:scaleX(0);transform-origin:left center;
  transition:transform .18s ease-out;
}
.nav-link:hover{color:var(--brand-600);background:var(--brand-100);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.active{color:var(--brand-600);font-weight:600;}
.nav-link.active::after{transform:scaleX(1);}
.nav-actions{display:flex;align-items:center;gap:10px;}
.icon-btn{
  width:40px;height:40px;border-radius:999px;border:1px solid var(--line);
  background:var(--surface);color:var(--ink-2);display:inline-flex;align-items:center;justify-content:center;
  cursor:pointer;transition:all .18s ease-out;
}
.icon-btn:hover{color:var(--brand-600);border-color:var(--brand-600);background:var(--brand-100);}
.icon-btn[aria-expanded="true"]{color:#fff;background:var(--brand-600);border-color:var(--brand-600);}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;line-height:1.2;letter-spacing:.01em;
  border:1px solid transparent;cursor:pointer;
  transition:background .18s ease-out,color .18s ease-out,border-color .18s ease-out,transform .18s ease-out,box-shadow .18s ease-out;
}
.btn:active{transform:translateY(1px);}
.btn-primary{background:var(--brand-600);color:#fff;box-shadow:0 6px 16px -12px rgba(27,94,140,.9);}
.btn-primary:hover{background:var(--brand-900);transform:translateY(-1px);box-shadow:0 12px 24px -16px rgba(18,59,88,.9);}
.btn-ghost{background:var(--surface);color:var(--brand-600);border-color:var(--brand-600);}
.btn-ghost:hover{background:var(--brand-100);transform:translateY(-1px);}
.btn-light{background:transparent;color:#fff;border-color:rgba(255,255,255,.55);}
.btn-light:hover{background:#fff;color:var(--brand-900);border-color:#fff;}
.nav-cta{padding:10px 18px;font-size:14px;}
@media (max-width:639px){.nav-cta{display:none;}.logo-sub{display:none;}}
.search-row{display:none;border-top:1px solid var(--line);background:var(--surface);}
.search-row.open{display:block;animation:fadeDown .2s ease-out;}
@keyframes fadeDown{from{opacity:0;transform:translateY(-6px);}to{opacity:1;transform:translateY(0);}}
.search-inner{display:flex;flex-wrap:wrap;align-items:center;gap:12px;padding:16px 0;}
.search-input{
  flex:1 1 240px;height:44px;padding:0 14px;border-radius:10px;
  border:1px solid var(--line);background:#fff;color:var(--ink);font-size:15px;
  transition:border-color .18s ease-out,box-shadow .18s ease-out;
}
.search-input::placeholder{color:#96A0AA;}
.search-input:focus{outline:none;border-color:var(--brand-600);box-shadow:0 0 0 3px rgba(27,94,140,.12);}
.search-hint{font-size:13px;color:var(--ink-2);}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0;}

/* ---------- 页面小页头 ---------- */
.page-hero{padding:28px 0 8px;}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:6px;font-size:13px;color:var(--ink-2);margin-bottom:20px;}
.breadcrumb a{color:var(--ink-2);transition:color .18s ease-out;}
.breadcrumb a:hover{color:var(--brand-600);}
.breadcrumb .sep{color:#BFC6CC;}
.breadcrumb .current{color:var(--ink);font-weight:600;}
.hero-grid{display:grid;grid-template-columns:1fr;gap:24px;align-items:center;}
@media (min-width:900px){.hero-grid{grid-template-columns:1.35fr .9fr;gap:48px;}}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;font-weight:600;letter-spacing:.08em;color:var(--brand-900);
  background:var(--brand-100);border-radius:999px;padding:5px 12px;
}
.page-title{
  position:relative;margin-top:16px;
  font-size:clamp(26px,3.6vw,38px);line-height:1.28;font-weight:700;letter-spacing:.01em;
}
.page-title::after{
  content:"";display:block;width:44px;height:4px;border-radius:2px;
  background:var(--accent);margin-top:14px;
}
.page-lead{margin-top:16px;font-size:16px;line-height:1.85;color:var(--ink-2);max-width:60ch;}
.hero-meta{display:flex;flex-wrap:wrap;gap:10px 18px;margin-top:22px;font-size:14px;color:var(--ink-2);}
.hero-meta span{display:inline-flex;align-items:center;gap:8px;}
.hero-meta span::before{content:"";width:6px;height:6px;border-radius:2px;background:var(--accent);}
.hero-figure{
  border-radius:var(--radius-img);overflow:hidden;border:1px solid var(--line);
  background:var(--surface);box-shadow:var(--shadow-card);
}
.hero-figure img{width:100%;height:auto;aspect-ratio:16/11;object-fit:cover;}

/* ---------- 锚点条 ---------- */
.anchor-bar{margin-top:32px;background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.anchor-track{display:flex;gap:10px;overflow-x:auto;padding:14px 0;scrollbar-width:none;-ms-overflow-style:none;}
.anchor-track::-webkit-scrollbar{display:none;}
.pill{
  flex:0 0 auto;display:inline-flex;align-items:center;gap:6px;
  padding:8px 16px;border-radius:999px;border:1px solid var(--line);background:#fff;
  font-size:14px;color:var(--ink-2);white-space:nowrap;
  transition:all .18s ease-out;
}
.pill:hover{color:var(--brand-600);border-color:var(--brand-600);background:var(--brand-100);transform:translateY(-1px);}

/* ---------- 通用板块 ---------- */
.section{padding:56px 0;}
@media (min-width:1024px){.section{padding:80px 0;}}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:32px;}
.section-title{
  position:relative;font-size:26px;line-height:1.35;font-weight:600;letter-spacing:.01em;padding-left:16px;
}
.section-title::before{
  content:"";position:absolute;left:0;top:6px;bottom:6px;width:4px;border-radius:2px;background:var(--brand-600);
}
.section-desc{margin-top:8px;font-size:14px;color:var(--ink-2);max-width:62ch;}
.link-arrow{
  display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--brand-600);
  transition:color .18s ease-out;
}
.link-arrow svg{transition:transform .18s ease-out;}
.link-arrow:hover{color:var(--brand-900);}
.link-arrow:hover svg{transform:translateX(4px);}

/* ---------- 交替图文 ---------- */
.alt-list{display:flex;flex-direction:column;}
.alt-row{
  display:grid;grid-template-columns:1fr;gap:20px;align-items:center;
  padding:36px 0;border-bottom:1px solid var(--line);
  scroll-margin-top:96px;
}
.alt-row:first-child{padding-top:8px;}
.alt-row:last-child{border-bottom:0;padding-bottom:8px;}
@media (min-width:900px){
  .alt-row{grid-template-columns:1fr 1fr;gap:56px;padding:44px 0;}
  .alt-row:nth-child(even) .row-media{order:2;}
}
.row-media{position:relative;border-radius:var(--radius-img);overflow:hidden;border:1px solid var(--line);background:var(--surface);box-shadow:var(--shadow-card);transition:box-shadow .2s ease-out,transform .2s ease-out;}
.row-media img{width:100%;height:auto;aspect-ratio:16/10;object-fit:cover;transition:transform .4s ease-out;}
.alt-row:hover .row-media{box-shadow:var(--shadow-hover);transform:translateY(-2px);}
.alt-row:hover .row-media img{transform:scale(1.02);}
.row-kicker{
  display:flex;align-items:center;gap:10px;
  font-size:13px;font-weight:600;letter-spacing:.08em;color:var(--accent);
  font-variant-numeric:tabular-nums;
}
.row-kicker::before{content:"";width:22px;height:1px;background:var(--accent);}
.row-title{margin-top:12px;font-size:19px;line-height:1.5;font-weight:600;}
@media (min-width:1024px){.row-title{font-size:21px;}}
.row-desc{margin-top:12px;font-size:15px;line-height:1.85;color:var(--ink-2);}
.tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px;}
.tag{
  display:inline-flex;align-items:center;padding:4px 10px;border-radius:999px;
  font-size:12px;font-weight:500;letter-spacing:.02em;
  background:var(--brand-100);color:var(--brand-900);
}
.tag-accent{background:rgba(192,138,78,.14);color:#8A5F2C;}
.points{margin-top:18px;display:flex;flex-direction:column;gap:8px;}
.points li{
  position:relative;padding-left:20px;font-size:14px;line-height:1.75;color:var(--ink-2);
}
.points li::before{
  content:"";position:absolute;left:2px;top:11px;width:7px;height:7px;border-radius:2px;
  background:var(--accent);opacity:.85;
}
.row-foot{margin-top:20px;display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;}
.row-time{font-size:13px;color:var(--ink-2);font-variant-numeric:tabular-nums;}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:820px;}
.faq-item{border-bottom:1px solid var(--line);}
.faq-item:first-child{border-top:1px solid var(--line);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:20px 4px;background:transparent;border:0;cursor:pointer;text-align:left;
  font-size:16px;font-weight:600;color:var(--ink);line-height:1.6;
  transition:color .18s ease-out;
}
.faq-q:hover{color:var(--brand-600);}
.faq-icon{
  flex:0 0 auto;width:20px;height:20px;position:relative;color:var(--brand-600);
  transition:transform .2s ease-out;
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:currentColor;border-radius:1px;
}
.faq-icon::before{left:0;right:0;top:9px;height:2px;}
.faq-icon::after{top:0;bottom:0;left:9px;width:2px;}
.faq-item.open .faq-icon{transform:rotate(45deg);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .25s ease-out;}
.faq-a p{padding:0 4px 20px;font-size:15px;line-height:1.85;color:var(--ink-2);max-width:72ch;}
.faq-item.open .faq-a{max-height:340px;}

/* ---------- 相关推荐 ---------- */
.rec-wrap{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:24px;box-shadow:var(--shadow-card);
}
@media (min-width:768px){.rec-wrap{padding:32px;}}
.rec-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px;}
.rec-tag{
  display:inline-flex;align-items:center;padding:8px 16px;border-radius:999px;
  border:1px solid var(--line);background:var(--bg);font-size:14px;color:var(--ink-2);
  transition:all .18s ease-out;
}
.rec-tag:hover{color:var(--brand-900);border-color:var(--accent);background:rgba(192,138,78,.12);transform:translateY(-1px);}

/* ---------- CTA 条带 ---------- */
.cta-band{
  background:var(--brand-900);border-radius:16px;padding:32px 24px;
  display:grid;grid-template-columns:1fr;gap:20px;align-items:center;
  box-shadow:0 20px 40px -32px rgba(18,59,88,.9);
}
@media (min-width:900px){.cta-band{grid-template-columns:1.4fr auto;padding:40px 40px;gap:32px;}}
.cta-title{font-size:21px;line-height:1.5;font-weight:600;color:#fff;}
.cta-desc{margin-top:10px;font-size:14px;line-height:1.8;color:rgba(255,255,255,.72);max-width:56ch;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;}
.copy-tip{font-size:13px;color:rgba(255,255,255,.7);min-height:18px;}

/* ---------- footer ---------- */
.site-footer{background:var(--brand-900);color:rgba(255,255,255,.72);margin-top:56px;padding:48px 0 0;}
@media (min-width:1024px){.site-footer{padding:64px 0 0;margin-top:80px;}}
.footer-grid{display:grid;grid-template-columns:1fr;gap:32px;}
@media (min-width:640px){.footer-grid{grid-template-columns:1fr 1fr;}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px;}}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-size:17px;font-weight:700;}
.footer-mark{
  width:20px;height:20px;border-radius:6px;flex:0 0 auto;
  background:linear-gradient(150deg,#3E86B5,var(--brand-600));
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.3);
}
.footer-about{margin-top:14px;font-size:14px;line-height:1.85;color:rgba(255,255,255,.66);max-width:38ch;}
.footer-h{font-size:15px;font-weight:600;color:#fff;margin-bottom:16px;letter-spacing:.02em;}
.footer-links{display:flex;flex-direction:column;gap:10px;}
.footer-links a{font-size:14px;color:rgba(255,255,255,.7);transition:color .18s ease-out,transform .18s ease-out;}
.footer-links a:hover{color:var(--accent);transform:translateX(2px);}
.footer-note{font-size:13px;line-height:1.8;color:rgba(255,255,255,.55);}
.footer-bottom{
  margin-top:40px;border-top:1px solid rgba(255,255,255,.14);
  padding:20px 0 88px;display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;
  font-size:13px;color:rgba(255,255,255,.55);
}
@media (min-width:768px){.footer-bottom{padding-bottom:24px;}}

/* ---------- 移动端底部 Tab ---------- */
.tabbar{
  position:fixed;left:0;right:0;bottom:0;z-index:90;
  display:grid;grid-template-columns:repeat(5,1fr);
  background:rgba(255,255,255,.97);
  backdrop-filter:blur(8px);
  border-top:1px solid var(--line);
  box-shadow:0 -6px 20px -16px rgba(18,59,88,.5);
  padding-bottom:env(safe-area-inset-bottom);
}
@media (min-width:768px){.tabbar{display:none;}}
.tab-item{
  position:relative;min-height:56px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;
  font-size:11px;color:var(--ink-2);transition:color .18s ease-out;padding:6px 2px;
}
.tab-item svg{width:20px;height:20px;}
.tab-item::before{
  content:"";position:absolute;top:2px;width:18px;height:2px;border-radius:2px;
  background:var(--brand-600);opacity:0;transition:opacity .18s ease-out;
}
.tab-item.active{color:var(--brand-600);font-weight:600;}
.tab-item.active::before{opacity:1;}
.tab-item:active{background:var(--brand-100);}
@media (max-width:767px){body{padding-bottom:88px;}}