/* roulang page: index */
:root{
  --c-bg:#F5F8FC; --c-surface:#FFFFFF; --c-surface-2:#EEF4FB; --c-line:#DDE7F2;
  --c-ink-900:#0F1F33; --c-ink-700:#24384F; --c-ink-500:#5B7290;
  --c-brand-700:#10406E; --c-brand-600:#16568F; --c-brand-500:#1E6FB8; --c-brand-300:#7FB3DE; --c-brand-50:#E8F2FB;
  --c-accent-500:#12B39A; --c-accent-100:#D9F5F0; --c-warm-500:#E8A33D;
  --r-card:14px; --r-btn:10px; --r-pill:999px; --r-hero:18px; --r-band:20px;
  --shadow-1:0 1px 2px rgba(15,31,51,.05),0 6px 18px -10px rgba(15,31,51,.14);
  --shadow-2:0 2px 4px rgba(15,31,51,.06),0 16px 34px -16px rgba(15,31,51,.22);
  --shadow-hero:0 24px 60px -30px rgba(16,64,110,.45);
  --nav-h:64px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;background:var(--c-bg);color:var(--c-ink-700);
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  font-size:16px;line-height:1.75;-webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0;}
a{color:var(--c-brand-600);text-decoration:none;transition:color .18s ease-out;}
a:hover{color:var(--c-brand-700);}
button,input{font:inherit;color:inherit;}
button{background:none;border:0;cursor:pointer;}
h1,h2,h3,h4{margin:0;color:var(--c-ink-900);font-weight:700;letter-spacing:0;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
:focus-visible{outline:3px solid var(--c-brand-300);outline-offset:2px;border-radius:6px;}
.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum";}

.shell{width:100%;max-width:1200px;margin:0 auto;padding:0 32px;}
.section{padding:96px 0;}
.section-sm{padding:72px 0;}

/* ---------- 按钮体系 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 20px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;line-height:1;white-space:nowrap;
  transition:background-color .18s ease-out,border-color .18s ease-out,color .18s ease-out,transform .18s ease-out,box-shadow .18s ease-out;
}
.btn-primary{background:var(--c-brand-600);color:#fff;box-shadow:var(--shadow-1);}
.btn-primary:hover{background:var(--c-brand-700);color:#fff;box-shadow:var(--shadow-2);}
.btn-primary:active{transform:translateY(1px);box-shadow:var(--shadow-1);}
.btn-ghost{background:var(--c-surface);color:var(--c-ink-700);border:1px solid var(--c-line);}
.btn-ghost:hover{border-color:var(--c-brand-600);color:var(--c-brand-600);}
.btn-ghost:active{transform:translateY(1px);}
.btn-link{
  display:inline-flex;align-items:center;gap:6px;min-height:44px;
  color:var(--c-brand-600);font-weight:600;font-size:15px;
  border-bottom:2px solid var(--c-brand-300);border-radius:0;
}
.btn-link:hover{color:var(--c-accent-500);border-bottom-color:var(--c-accent-500);}

/* ---------- 徽章 / 标签 ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;border-radius:var(--r-pill);
  background:var(--c-brand-50);color:var(--c-brand-700);
  font-size:12px;line-height:1.4;font-weight:600;
}
.badge-accent{background:var(--c-accent-100);color:#0B7A69;}
.badge-warm{background:#FBF0DC;color:#8A5A11;}
.pill{
  display:inline-flex;align-items:center;gap:6px;
  padding:7px 14px;border-radius:var(--r-pill);
  background:var(--c-surface);border:1px solid var(--c-line);
  color:var(--c-ink-700);font-size:13px;font-weight:500;
  transition:border-color .18s ease-out,color .18s ease-out,background-color .18s ease-out;
}
.pill:hover{border-color:var(--c-brand-300);color:var(--c-brand-600);background:var(--c-brand-50);}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:50;height:var(--nav-h);
  background:rgba(245,248,252,0);border-bottom:1px solid transparent;
  transition:background-color .22s ease-out,border-color .22s ease-out,box-shadow .22s ease-out,backdrop-filter .22s ease-out;
}
.site-header.is-stuck{
  background:rgba(255,255,255,.92);
  -webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);
  border-bottom:1px solid var(--c-line);box-shadow:var(--shadow-1);
}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:var(--nav-h);gap:24px;}
.brand{display:flex;align-items:center;gap:10px;color:var(--c-ink-900);}
.brand:hover{color:var(--c-ink-900);}
.brand-mark{
  width:36px;height:36px;border-radius:10px;flex:0 0 36px;
  background:linear-gradient(140deg,var(--c-brand-600),var(--c-brand-500));
  color:#fff;display:flex;align-items:center;justify-content:center;
  font-size:15px;font-weight:700;
}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-text b{font-size:19px;font-weight:700;color:var(--c-ink-900);letter-spacing:0;}
.brand-text span{font-size:11px;color:var(--c-ink-500);letter-spacing:.06em;}
.nav-links{display:flex;align-items:center;gap:4px;}
.nav-links a{
  position:relative;display:inline-flex;align-items:center;height:44px;padding:0 14px;
  color:var(--c-ink-700);font-size:15px;font-weight:500;border-radius:8px;
}
.nav-links a::after{
  content:"";position:absolute;left:14px;right:14px;bottom:4px;height:2px;
  background:var(--c-brand-600);transform:scaleX(0);transform-origin:left;
  transition:transform .18s ease-out;border-radius:2px;
}
.nav-links a:hover{color:var(--c-brand-600);}
.nav-links a:hover::after,.nav-links a.active::after{transform:scaleX(1);}
.nav-links a.active{color:var(--c-brand-700);font-weight:600;}
.nav-right{display:flex;align-items:center;gap:12px;}
.nav-search{
  display:flex;align-items:center;gap:8px;height:42px;padding:0 14px;
  border:1px solid var(--c-line);border-radius:var(--r-pill);background:var(--c-surface);
  color:var(--c-ink-500);font-size:14px;min-width:176px;
  transition:border-color .18s ease-out,box-shadow .18s ease-out;
}
.nav-search:hover{border-color:var(--c-brand-300);}
.nav-search input{border:0;outline:none;background:transparent;width:100%;font-size:14px;}
.nav-toggle{display:none;width:44px;height:44px;border-radius:10px;border:1px solid var(--c-line);background:var(--c-surface);color:var(--c-ink-700);align-items:center;justify-content:center;}

/* 抽屉 */
.drawer-mask{position:fixed;inset:0;background:rgba(15,31,51,.45);opacity:0;visibility:hidden;transition:opacity .22s ease-out,visibility .22s ease-out;z-index:60;}
.drawer-mask.open{opacity:1;visibility:visible;}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:88%;max-width:360px;z-index:61;
  background:var(--c-surface);transform:translateX(100%);
  transition:transform .26s ease-out;padding:20px;overflow-y:auto;
  box-shadow:-20px 0 50px -30px rgba(15,31,51,.4);
}
.drawer.open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px;}
.drawer nav{display:flex;flex-direction:column;gap:4px;margin-bottom:20px;}
.drawer nav a{
  display:flex;align-items:center;justify-content:space-between;
  height:52px;padding:0 14px;border-radius:10px;color:var(--c-ink-700);font-size:16px;
  border:1px solid transparent;
}
.drawer nav a:hover{background:var(--c-surface-2);color:var(--c-brand-600);}
.drawer nav a.active{background:var(--c-brand-50);color:var(--c-brand-700);font-weight:600;border-color:var(--c-brand-300);}

/* ---------- Hero ---------- */
.hero{padding:calc(var(--nav-h) + 56px) 0 88px;}
.hero-grid{display:grid;grid-template-columns:7fr 5fr;gap:56px;align-items:end;}
.hero-eyebrow{display:inline-flex;align-items:center;gap:8px;margin-bottom:18px;}
.hero h1{font-size:46px;line-height:1.25;font-weight:700;color:var(--c-ink-900);margin-bottom:20px;}
.hero h1 em{font-style:normal;color:var(--c-brand-600);}
.hero-sub{font-size:17px;line-height:1.8;color:var(--c-ink-500);max-width:560px;margin-bottom:30px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:26px;}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;}
.hero-visual{position:relative;}
.hero-visual img{
  width:100%;aspect-ratio:4/5;object-fit:cover;border-radius:var(--r-hero);
  box-shadow:var(--shadow-hero);background:linear-gradient(150deg,var(--c-brand-50),var(--c-surface-2));
}
.hero-float{
  position:absolute;left:18px;right:18px;bottom:18px;
  display:flex;align-items:center;gap:12px;
  padding:14px 16px;border-radius:12px;
  background:rgba(255,255,255,.9);
  -webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);
  border:1px solid var(--c-line);box-shadow:var(--shadow-1);
}
.hero-float strong{display:block;font-size:14px;color:var(--c-ink-900);font-weight:600;}
.hero-float p{font-size:12px;color:var(--c-ink-500);}
.status-dot{width:10px;height:10px;border-radius:50%;background:var(--c-accent-500);flex:0 0 10px;box-shadow:0 0 0 4px var(--c-accent-100);}

/* ---------- 数据条 ---------- */
.stats{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-band);
  box-shadow:var(--shadow-1);display:grid;grid-template-columns:repeat(4,1fr);
  overflow:hidden;
}
.stat{padding:28px 24px;border-right:1px solid var(--c-line);}
.stat:last-child{border-right:0;}
.stat b{display:block;font-size:32px;line-height:1.2;font-weight:700;color:var(--c-brand-700);margin-bottom:6px;}
.stat span{font-size:12px;color:var(--c-ink-500);letter-spacing:.02em;}

/* ---------- 通用板块标题 ---------- */
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px;}
.sec-head h2{font-size:30px;line-height:1.35;font-weight:650;color:var(--c-ink-900);margin-bottom:10px;}
.sec-head p{font-size:15px;color:var(--c-ink-500);max-width:640px;}
.sec-head .link-more{flex:0 0 auto;}

/* ---------- Bento 拼贴 ---------- */
.bento{display:grid;grid-template-columns:repeat(12,1fr);gap:24px;}
.bento-main{
  grid-column:span 7;grid-row:span 2;position:relative;display:block;
  border-radius:var(--r-card);overflow:hidden;min-height:420px;border:1px solid var(--c-line);
  box-shadow:var(--shadow-1);transition:transform .18s ease-out,box-shadow .18s ease-out,border-color .18s ease-out;
}
.bento-side{
  grid-column:span 5;position:relative;display:block;
  border-radius:var(--r-card);overflow:hidden;min-height:198px;border:1px solid var(--c-line);
  box-shadow:var(--shadow-1);transition:transform .18s ease-out,box-shadow .18s ease-out,border-color .18s ease-out;
}
.bento-main:hover,.bento-side:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);border-color:var(--c-brand-300);}
.bento-main img,.bento-side img{width:100%;height:100%;object-fit:cover;position:absolute;inset:0;}
.bento-veil{position:absolute;inset:0;background:linear-gradient(180deg,rgba(15,31,51,.06) 30%,rgba(15,31,51,.78) 100%);}
.bento-body{position:relative;z-index:2;height:100%;display:flex;flex-direction:column;justify-content:flex-end;padding:24px;color:#fff;}
.bento-body h3{color:#fff;font-size:22px;line-height:1.4;font-weight:600;margin:12px 0 8px;}
.bento-side .bento-body h3{font-size:18px;}
.bento-body p{font-size:13px;color:rgba(255,255,255,.82);}
.bento-side .bento-body p{display:none;}
.bento-chip{
  align-self:flex-start;padding:4px 12px;border-radius:var(--r-pill);
  background:rgba(255,255,255,.18);border:1px solid rgba(255,255,255,.32);
  font-size:12px;font-weight:600;color:#fff;
}

/* ---------- 目录 ---------- */
.catalog{display:grid;grid-template-columns:repeat(12,1fr);gap:24px;align-items:start;}
.catalog-aside{grid-column:span 4;position:sticky;top:calc(var(--nav-h) + 24px);}
.catalog-aside h2{font-size:28px;line-height:1.4;margin-bottom:14px;}
.catalog-aside p{font-size:15px;color:var(--c-ink-500);margin-bottom:20px;}
.catalog-list{grid-column:span 8;border-top:1px solid var(--c-line);}
.catalog-item{
  display:grid;grid-template-columns:64px 1fr 32px;align-items:center;gap:16px;
  padding:22px 8px;border-bottom:1px solid var(--c-line);
  transition:background-color .18s ease-out;
}
.catalog-item:hover{background:var(--c-surface-2);}
.catalog-item .idx{font-size:26px;font-weight:700;color:var(--c-brand-300);font-variant-numeric:tabular-nums;transition:color .18s ease-out;}
.catalog-item:hover .idx{color:var(--c-accent-500);}
.catalog-item h3{font-size:17px;font-weight:600;color:var(--c-ink-900);margin-bottom:4px;}
.catalog-item p{font-size:13px;color:var(--c-ink-500);}
.catalog-item .arrow{color:var(--c-brand-300);font-size:15px;text-align:right;}

/* ---------- 横向卡带 ---------- */
.rail-wrap{position:relative;}
.rail{
  display:flex;gap:20px;overflow-x:auto;scroll-snap-type:x mandatory;
  padding:4px 4px 18px;scrollbar-width:none;-ms-overflow-style:none;
}
.rail::-webkit-scrollbar{display:none;}
.rail-card{
  flex:0 0 300px;scroll-snap-align:start;background:var(--c-surface);
  border:1px solid var(--c-line);border-radius:var(--r-card);overflow:hidden;
  box-shadow:var(--shadow-1);transition:transform .18s ease-out,box-shadow .18s ease-out,border-color .18s ease-out;
  display:flex;flex-direction:column;
}
.rail-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);border-color:var(--c-brand-300);}
.rail-card img{width:100%;aspect-ratio:16/9;object-fit:cover;background:var(--c-surface-2);}
.rail-body{padding:18px 20px 20px;display:flex;flex-direction:column;gap:10px;flex:1;}
.rail-body h3{font-size:16px;line-height:1.5;font-weight:600;color:var(--c-ink-900);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.rail-card:hover h3{color:var(--c-brand-600);}
.rail-meta{display:flex;align-items:center;justify-content:space-between;font-size:12px;color:var(--c-ink-500);margin-top:auto;}
.rail-nav{display:flex;gap:10px;}
.rail-btn{
  width:44px;height:44px;border-radius:50%;border:1px solid var(--c-line);background:var(--c-surface);
  color:var(--c-brand-600);display:flex;align-items:center;justify-content:center;
  transition:background-color .18s ease-out,color .18s ease-out,border-color .18s ease-out,box-shadow .18s ease-out;
}
.rail-btn:hover{background:var(--c-brand-600);color:#fff;border-color:var(--c-brand-600);box-shadow:var(--shadow-1);}

/* ---------- 最新信息列表 ---------- */
.news{display:grid;grid-template-columns:repeat(12,1fr);gap:24px;align-items:start;}
.news-main{grid-column:span 8;}
.news-side{grid-column:span 4;position:sticky;top:calc(var(--nav-h) + 24px);}
.post{
  display:grid;grid-template-columns:1fr 28px;gap:16px;align-items:center;
  padding:22px 4px 22px 0;border-bottom:1px solid var(--c-line);
  transition:background-color .18s ease-out;
}
.post:first-child{border-top:1px solid var(--c-line);}
.post:hover{background:var(--c-surface-2);}
.post h3{font-size:17px;line-height:1.5;font-weight:600;color:var(--c-ink-900);margin:8px 0 8px;transition:color .18s ease-out;}
.post:hover h3{color:var(--c-brand-600);}
.post p{font-size:14px;line-height:1.7;color:var(--c-ink-500);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.post-meta{display:flex;align-items:center;gap:12px;font-size:12px;color:var(--c-ink-500);margin-top:10px;}
.post .arrow{color:var(--c-brand-300);}
.empty-box{
  border:1px dashed var(--c-line);border-radius:14px;padding:44px 24px;text-align:center;background:var(--c-surface);
}
.empty-box i{font-size:24px;color:var(--c-brand-300);}
.empty-box p{font-size:14px;color:var(--c-ink-500);margin:12px 0 18px;}
.side-card{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:22px;box-shadow:var(--shadow-1);margin-bottom:24px;
}
.side-card h3{font-size:16px;font-weight:600;color:var(--c-ink-900);margin-bottom:16px;padding-bottom:12px;border-bottom:1px solid var(--c-line);}
.side-list li{display:flex;gap:12px;align-items:flex-start;padding:11px 0;border-bottom:1px dashed var(--c-line);}
.side-list li:last-child{border-bottom:0;}
.side-list .rank{font-size:13px;font-weight:700;color:var(--c-brand-300);font-variant-numeric:tabular-nums;flex:0 0 18px;padding-top:2px;}
.side-list a{font-size:14px;line-height:1.6;color:var(--c-ink-700);}
.side-list a:hover{color:var(--c-brand-600);}
.tag-cloud{display:flex;flex-wrap:wrap;gap:10px;}

/* ---------- 推荐横排卡 ---------- */
.picks{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.pick{
  display:grid;grid-template-columns:96px 1fr;gap:18px;align-items:center;
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:18px;box-shadow:var(--shadow-1);
  transition:transform .18s ease-out,box-shadow .18s ease-out,border-color .18s ease-out;
}
.pick:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);border-color:var(--c-brand-300);}
.pick img{width:96px;height:96px;border-radius:12px;object-fit:cover;background:var(--c-surface-2);}
.pick h3{font-size:16px;font-weight:600;color:var(--c-ink-900);line-height:1.5;margin:8px 0 6px;}
.pick:hover h3{color:var(--c-brand-600);}
.pick p{font-size:13px;color:var(--c-ink-500);line-height:1.6;}

/* ---------- CTA 区块 ---------- */
.cta-band{
  background:var(--c-surface-2);border:1px solid var(--c-line);border-radius:var(--r-band);
  padding:44px;display:grid;grid-template-columns:1fr auto;gap:32px;align-items:center;
}
.cta-band h2{font-size:26px;line-height:1.4;margin-bottom:12px;}
.cta-band p{font-size:15px;color:var(--c-ink-500);max-width:620px;}
.cta-actions{display:flex;flex-direction:column;align-items:flex-end;gap:18px;}
.share-row{display:flex;gap:10px;}
.share-btn{
  width:40px;height:40px;border-radius:50%;background:var(--c-surface);border:1px solid var(--c-line);
  color:var(--c-ink-700);display:flex;align-items:center;justify-content:center;
  transition:background-color .18s ease-out,color .18s ease-out,border-color .18s ease-out;
}
.share-btn:hover{background:var(--c-brand-600);color:#fff;border-color:var(--c-brand-600);}

/* ---------- FAQ ---------- */
.faq-list{max-width:760px;margin:0 auto;border-top:1px solid var(--c-line);}
.faq-item{border-bottom:1px solid var(--c-line);}
.faq-item summary{
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  min-height:56px;padding:16px 0;font-size:16px;font-weight:600;color:var(--c-ink-900);
  cursor:pointer;list-style:none;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary:hover{color:var(--c-brand-600);}
.faq-icon{
  flex:0 0 26px;width:26px;height:26px;border-radius:50%;
  background:var(--c-brand-50);color:var(--c-brand-600);
  display:flex;align-items:center;justify-content:center;font-size:15px;font-weight:600;
  transition:transform .18s ease-out,background-color .18s ease-out;
}
.faq-item[open] .faq-icon{transform:rotate(45deg);background:var(--c-accent-100);color:#0B7A69;}
.faq-body{padding:0 0 20px;font-size:15px;line-height:1.75;color:var(--c-ink-500);max-width:660px;}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--c-surface);border-top:1px solid var(--c-line);margin-top:24px;}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1.4fr;gap:40px;padding:64px 0 40px;}
.footer-grid h3{font-size:14px;font-weight:700;color:var(--c-ink-900);margin-bottom:18px;letter-spacing:.02em;}
.footer-grid ul li{margin-bottom:12px;}
.footer-grid ul a{font-size:14px;color:var(--c-ink-500);}
.footer-grid ul a:hover{color:var(--c-brand-600);}
.footer-brand p{font-size:14px;color:var(--c-ink-500);line-height:1.8;margin-top:16px;max-width:320px;}
.footer-bottom{
  border-top:1px solid var(--c-line);padding:22px 0 34px;
  display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between;
  font-size:13px;color:var(--c-ink-500);
}

/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  :root{--nav-h:60px;}
  .shell{padding:0 24px;}
  .section{padding:72px 0;}
  .section-sm{padding:56px 0;}
  .nav-links,.nav-search{display:none;}
  .nav-toggle{display:flex;}
  .hero{padding:calc(var(--nav-h) + 40px) 0 64px;}
  .hero-grid{grid-template-columns:1fr;gap:36px;align-items:start;}
  .hero h1{font-size:36px;}
  .hero-sub{font-size:16px;}
  .hero-visual img{aspect-ratio:16/10;}
  .stats{grid-template-columns:repeat(2,1fr);}
  .stat:nth-child(2){border-right:0;}
  .stat:nth-child(1),.stat:nth-child(2){border-bottom:1px solid var(--c-line);}
  .bento-main{grid-column:span 12;grid-row:auto;min-height:300px;}
  .bento-side{grid-column:span 12;min-height:190px;}
  .catalog-aside,.catalog-list,.news-main,.news-side{grid-column:span 12;}
  .catalog-aside,.news-side{position:static;}
  .picks{grid-template-columns:1fr;}
  .cta-band{grid-template-columns:1fr;padding:32px;}
  .cta-actions{align-items:flex-start;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;padding:48px 0 32px;}
}
@media (max-width:640px){
  .shell{padding:0 20px;}
  .section{padding:56px 0;}
  .hero h1{font-size:29px;}
  .hero-eyebrow .badge{font-size:11px;}
  .sec-head{flex-direction:column;align-items:flex-start;gap:12px;margin-bottom:28px;}
  .sec-head h2{font-size:23px;}
  .stats{grid-template-columns:1fr;}
  .stat{border-right:0;border-bottom:1px solid var(--c-line);}
  .stat:last-child{border-bottom:0;}
  .catalog-item{grid-template-columns:48px 1fr;gap:12px;}
  .catalog-item .arrow{display:none;}
  .catalog-item .idx{font-size:22px;}
  .rail-card{flex:0 0 84%;}
  .post{grid-template-columns:1fr;}
  .post .arrow{display:none;}
  .pick{grid-template-columns:72px 1fr;gap:14px;}
  .pick img{width:72px;height:72px;}
  .footer-grid{grid-template-columns:1fr;}
  .brand-text b{font-size:17px;}
}

/* roulang page: article */
:root{
  --c-bg:#F5F8FC; --c-surface:#FFFFFF; --c-surface-2:#EEF4FB; --c-line:#DDE7F2;
  --c-ink-900:#0F1F33; --c-ink-700:#24384F; --c-ink-500:#5B7290;
  --c-brand-700:#10406E; --c-brand-600:#16568F; --c-brand-500:#1E6FB8; --c-brand-300:#7FB3DE; --c-brand-50:#E8F2FB;
  --c-accent-500:#12B39A; --c-accent-100:#D9F5F0; --c-warm-500:#E8A33D;
  --r-card:14px; --r-btn:10px; --r-hero:18px; --r-block:20px; --r-pill:999px;
  --shadow-1:0 1px 2px rgba(15,31,51,.05),0 6px 18px -10px rgba(15,31,51,.14);
  --shadow-2:0 2px 4px rgba(15,31,51,.06),0 16px 34px -16px rgba(15,31,51,.22);
  --shadow-hero:0 24px 60px -30px rgba(16,64,110,.45);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;background:var(--c-bg);color:var(--c-ink-700);
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  font-size:16px;line-height:1.75;font-variant-numeric:tabular-nums;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0}
a{color:var(--c-brand-600);text-decoration:none;transition:color .18s ease-out}
button,input{font:inherit;color:inherit}
button{cursor:pointer}
:focus-visible{outline:3px solid var(--c-brand-300);outline-offset:2px;border-radius:4px}
.hidden{display:none !important}
.shell{width:100%;max-width:1200px;margin:0 auto;padding-left:32px;padding-right:32px}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:50;background:rgba(255,255,255,.94);
  backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);
  border-bottom:1px solid var(--c-line);transition:box-shadow .25s ease-out;
}
.site-header.is-solid{box-shadow:var(--shadow-1)}
.header-inner{display:flex;align-items:center;gap:20px;height:64px}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{
  width:34px;height:34px;flex:0 0 auto;border-radius:10px;background:var(--c-brand-600);
  color:#fff;display:grid;place-items:center;font-size:17px;font-weight:700;line-height:1;
}
.brand-text{display:flex;flex-direction:column;line-height:1.18}
.brand-text b{font-size:18px;font-weight:700;color:var(--c-ink-900);letter-spacing:.01em}
.brand-text span{font-size:11px;color:var(--c-ink-500);letter-spacing:.06em}
.nav-links{display:flex;align-items:center;gap:22px;margin-left:14px}
.nav-links a{
  position:relative;display:inline-flex;align-items:center;height:64px;
  font-size:15px;color:var(--c-ink-700);transition:color .18s ease-out;
}
.nav-links a:hover{color:var(--c-brand-600)}
.nav-links a.active{color:var(--c-brand-700);font-weight:600}
.nav-links a.active::after{
  content:"";position:absolute;left:0;right:0;bottom:14px;height:2px;
  border-radius:2px;background:var(--c-brand-500);
}
.header-actions{margin-left:auto;display:flex;align-items:center;gap:12px}
.nav-search{
  display:flex;align-items:center;gap:8px;height:38px;padding:0 14px;
  border:1px solid var(--c-line);border-radius:var(--r-pill);background:var(--c-surface-2);
  transition:border-color .18s ease-out,background .18s ease-out;
}
.nav-search:focus-within{border-color:var(--c-brand-300);background:#fff}
.nav-search svg{width:15px;height:15px;flex:0 0 auto;color:var(--c-ink-500)}
.nav-search input{
  width:150px;border:0;background:transparent;outline:none;font-size:14px;color:var(--c-ink-700);
}
.nav-search input::placeholder{color:#93A6BC}
.nav-toggle{
  display:none;width:40px;height:40px;border-radius:var(--r-btn);
  border:1px solid var(--c-line);background:#fff;color:var(--c-ink-700);
  align-items:center;justify-content:center;
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 22px;border-radius:var(--r-btn);border:1px solid transparent;
  font-size:15px;font-weight:600;line-height:1;cursor:pointer;
  transition:background .18s ease-out,color .18s ease-out,border-color .18s ease-out,transform .12s ease-out,box-shadow .18s ease-out;
}
.btn-primary{background:var(--c-brand-600);color:#fff;box-shadow:0 10px 20px -14px rgba(22,86,143,.95)}
.btn-primary:hover{background:var(--c-brand-700)}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{background:#fff;border-color:var(--c-line);color:var(--c-ink-700)}
.btn-ghost:hover{border-color:var(--c-brand-600);color:var(--c-brand-600)}
.btn-sm{height:38px;padding:0 16px;font-size:14px}
.btn-text{
  display:inline-flex;align-items:center;gap:4px;color:var(--c-brand-600);
  font-size:14px;font-weight:600;border-bottom:2px solid var(--c-brand-300);padding-bottom:2px;
}
.btn-text:hover{color:var(--c-accent-500);border-bottom-color:var(--c-accent-500)}

/* ---------- 抽屉 ---------- */
.drawer{
  position:fixed;top:0;right:0;z-index:60;width:88%;max-width:380px;height:100%;
  background:#fff;padding:24px 22px 32px;overflow-y:auto;
  transform:translateX(101%);transition:transform .28s ease-out;
  box-shadow:-18px 0 44px -24px rgba(15,31,51,.4);
}
.drawer.open{transform:translateX(0)}
.drawer-mask{
  position:fixed;inset:0;z-index:55;background:rgba(15,31,51,.45);
  opacity:0;visibility:hidden;transition:opacity .25s ease-out,visibility .25s;
}
.drawer-mask.show{opacity:1;visibility:visible}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}
.drawer-head b{font-size:16px;color:var(--c-ink-900)}
.drawer-close{width:36px;height:36px;border-radius:var(--r-btn);border:1px solid var(--c-line);background:#fff;color:var(--c-ink-700)}
.drawer nav{display:flex;flex-direction:column;margin:6px 0 18px}
.drawer nav a{
  display:flex;align-items:center;min-height:46px;font-size:15px;color:var(--c-ink-700);
  border-bottom:1px solid var(--c-line);
}
.drawer nav a:hover{color:var(--c-brand-600)}
.drawer .btn{width:100%}
.drawer-search{display:flex;align-items:center;gap:8px;height:42px;padding:0 14px;border:1px solid var(--c-line);border-radius:var(--r-btn);background:var(--c-surface-2);margin-bottom:16px}
.drawer-search input{flex:1;border:0;background:transparent;outline:none;font-size:14px}

/* ---------- 面包屑 ---------- */
.crumb-bar{padding:18px 0 0}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--c-ink-500)}
.crumbs a{color:var(--c-ink-500)}
.crumbs a:hover{color:var(--c-brand-600)}
.crumbs .sep{color:#A9BACD}
.crumbs .current{color:var(--c-ink-500);max-width:52ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* ---------- 文章头部 ---------- */
.article-wrap{padding-top:20px;padding-bottom:88px}
.article-inner{max-width:1080px;margin:0 auto}
.article-head{padding-bottom:26px;border-bottom:1px solid var(--c-line)}
.badge{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:var(--r-pill);
  font-size:12px;font-weight:600;line-height:1.4;letter-spacing:.01em;
}
.badge-brand{background:var(--c-brand-50);color:var(--c-brand-700);border:1px solid #C9DFF3}
.badge-accent{background:var(--c-accent-100);color:#0B8571;border:1px solid #B5EBE1}
.article-head h1{
  margin:16px 0 18px;font-size:clamp(26px,3.2vw,40px);line-height:1.3;font-weight:700;
  color:var(--c-ink-900);letter-spacing:.005em;
}
.meta-line{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:13px;color:var(--c-ink-500)}
.meta-line .dot{width:3px;height:3px;border-radius:50%;background:#B9C8D8}

/* ---------- 正文栅格 ---------- */
.article-grid{
  display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:48px;
  align-items:start;margin-top:34px;
}
.article-body{font-size:16px;line-height:1.8;color:var(--c-ink-700);word-wrap:break-word;overflow-wrap:break-word}
.article-body > *:first-child{margin-top:0}
.article-body p{margin:0 0 18px}
.article-body h2{
  position:relative;margin:40px 0 16px;padding-left:14px;
  font-size:26px;line-height:1.4;font-weight:650;color:var(--c-ink-900);scroll-margin-top:92px;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:8px;bottom:8px;width:3px;
  border-radius:2px;background:var(--c-brand-500);
}
.article-body h3{
  margin:28px 0 12px;font-size:20px;line-height:1.5;font-weight:600;
  color:var(--c-ink-900);scroll-margin-top:92px;
}
.article-body h4{margin:22px 0 10px;font-size:17px;font-weight:600;color:var(--c-ink-900)}
.article-body ul,.article-body ol{margin:0 0 18px;padding:0}
.article-body ul{list-style:none}
.article-body ul li{position:relative;padding-left:18px;margin:8px 0}
.article-body ul li::before{
  content:"";position:absolute;left:0;top:.68em;width:7px;height:7px;
  border-radius:2px;background:var(--c-brand-300);
}
.article-body ol{list-style:decimal;padding-left:22px}
.article-body ol li{margin:8px 0}
.article-body blockquote{
  margin:22px 0;padding:14px 20px;background:var(--c-brand-50);
  border-left:3px solid var(--c-brand-500);border-radius:0 12px 12px 0;color:var(--c-ink-700);
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{margin:22px auto;border-radius:12px;box-shadow:var(--shadow-1)}
.article-body a{color:var(--c-brand-600);border-bottom:1px solid var(--c-brand-300)}
.article-body a:hover{color:var(--c-accent-500);border-bottom-color:var(--c-accent-500)}
.article-body strong{color:var(--c-ink-900)}
.article-body hr{border:0;border-top:1px solid var(--c-line);margin:32px 0}
.article-body table{width:100%;border-collapse:collapse;margin:20px 0;font-size:15px}
.article-body th,.article-body td{border:1px solid var(--c-line);padding:10px 12px;text-align:left;vertical-align:top}
.article-body th{background:var(--c-surface-2);font-weight:600;color:var(--c-ink-900)}
.article-body code{background:var(--c-surface-2);border-radius:6px;padding:1px 6px;font-size:14px}

/* ---------- 侧栏目录 ---------- */
.article-aside{position:sticky;top:92px;display:flex;flex-direction:column;gap:18px}
.toc-card{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:18px;box-shadow:var(--shadow-1);
}
.toc-title{
  margin:0 0 12px;padding-bottom:10px;border-bottom:1px solid var(--c-line);
  font-size:14px;font-weight:600;color:var(--c-ink-900);
}
.toc-list{list-style:none;margin:0;padding:0;max-height:58vh;overflow-y:auto;scrollbar-width:thin}
.toc-list a{
  display:block;padding:7px 8px;border-left:2px solid transparent;border-radius:0 8px 8px 0;
  font-size:13.5px;line-height:1.5;color:var(--c-ink-500);
  transition:background .18s ease-out,color .18s ease-out,border-color .18s ease-out;
}
.toc-list a.lvl-3{padding-left:20px;font-size:13px}
.toc-list a:hover{background:var(--c-surface-2);color:var(--c-brand-600)}
.toc-list a.on{background:var(--c-brand-50);color:var(--c-brand-700);font-weight:600;border-left-color:var(--c-brand-500)}
.quick-list{list-style:none;margin:0;padding:0}
.quick-list li + li{border-top:1px solid var(--c-line)}
.quick-list a{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  min-height:44px;font-size:14px;color:var(--c-ink-700);
}
.quick-list a::after{content:"›";color:var(--c-brand-300);font-size:16px;line-height:1}
.quick-list a:hover{color:var(--c-brand-600)}

/* ---------- 空态 ---------- */
.article-empty{
  border:1px dashed var(--c-line);border-radius:var(--r-card);background:#fff;
  padding:48px 24px;text-align:center;
}
.article-empty .ae-title{margin:0 0 8px;font-size:18px;font-weight:600;color:var(--c-ink-900)}
.article-empty .ae-text{margin:0 0 20px;font-size:14px;color:var(--c-ink-500)}

/* ---------- 文末操作条 ---------- */
.article-foot{
  display:flex;flex-wrap:wrap;gap:16px;align-items:center;justify-content:space-between;
  margin-top:40px;padding-top:22px;border-top:1px solid var(--c-line);
}
.tags{display:flex;flex-wrap:wrap;gap:8px}
.tag{
  display:inline-flex;align-items:center;height:30px;padding:0 13px;border-radius:var(--r-pill);
  background:var(--c-surface-2);border:1px solid var(--c-line);color:var(--c-ink-500);
  font-size:13px;line-height:1.4;transition:background .18s ease-out,color .18s ease-out,border-color .18s ease-out;
}
.tag:hover{background:#fff;border-color:var(--c-brand-300);color:var(--c-brand-600)}
.share-row{display:flex;align-items:center;gap:10px}
.share-btn{
  position:relative;width:40px;height:40px;border-radius:50%;
  border:1px solid var(--c-line);background:#fff;color:var(--c-ink-500);
  display:grid;place-items:center;transition:background .18s ease-out,color .18s ease-out,border-color .18s ease-out,transform .12s ease-out;
}
.share-btn svg{width:17px;height:17px}
.share-btn:hover{background:var(--c-brand-600);border-color:var(--c-brand-600);color:#fff}
.share-btn:active{transform:translateY(1px)}
.share-btn.done{background:var(--c-accent-500);border-color:var(--c-accent-500);color:#fff}

/* ---------- 相关推荐 ---------- */
.section{margin-top:64px}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:18px}
.section-head h2{margin:0;font-size:22px;font-weight:650;color:var(--c-ink-900);line-height:1.4}
.section-head p{margin:6px 0 0;font-size:14px;color:var(--c-ink-500)}
.related-list{list-style:none;margin:0;padding:0;border-top:1px solid var(--c-line)}
.related-list li{border-bottom:1px solid var(--c-line)}
.related-list a{display:flex;align-items:center;gap:14px;padding:14px 6px;transition:background .18s ease-out}
.related-list a:hover{background:var(--c-surface-2)}
.rl-badge{
  flex:0 0 auto;display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:6px;
  background:var(--c-brand-50);color:var(--c-brand-700);font-size:12px;font-weight:600;
}
.rl-title{
  flex:1 1 auto;min-width:0;font-size:15px;font-weight:600;color:var(--c-ink-900);
  overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
}
.related-list a:hover .rl-title{color:var(--c-brand-600)}
.rl-time{flex:0 0 auto;font-size:13px;color:var(--c-ink-500)}

/* ---------- 频道卡 ---------- */
.channel-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.chn-card{
  display:block;background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);
  overflow:hidden;box-shadow:var(--shadow-1);
  transition:transform .18s ease-out,box-shadow .18s ease-out,border-color .18s ease-out;
}
.chn-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);border-color:var(--c-brand-300)}
.chn-thumb{aspect-ratio:16/9;background:linear-gradient(135deg,var(--c-brand-50),#fff);overflow:hidden}
.chn-thumb img{width:100%;height:100%;object-fit:cover}
.chn-body{padding:16px 18px 20px}
.chn-body h3{margin:0 0 8px;font-size:17px;font-weight:600;color:var(--c-ink-900)}
.chn-body p{margin:0;font-size:14px;line-height:1.7;color:var(--c-ink-500)}

/* ---------- 上一篇 / 下一篇 ---------- */
.nextprev{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;margin-top:36px}
.np-card{
  display:block;background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:18px 20px;box-shadow:var(--shadow-1);
  transition:transform .18s ease-out,box-shadow .18s ease-out,border-color .18s ease-out;
}
.np-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);border-color:var(--c-brand-300)}
.np-dir{display:flex;align-items:center;gap:6px;font-size:12px;color:var(--c-ink-500);margin-bottom:8px}
.np-card h3{
  margin:0;font-size:16px;font-weight:600;color:var(--c-ink-900);line-height:1.5;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.np-card:hover h3{color:var(--c-brand-600)}
.np-right{text-align:right}
.np-right .np-dir{justify-content:flex-end}
.np-back{margin-top:28px}

/* ---------- 页脚 ---------- */
.site-footer{background:#fff;border-top:1px solid var(--c-line)}
.site-footer .shell{padding-top:56px;padding-bottom:26px}
.footer-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1fr;gap:36px}
.footer-brand .brand-text b{font-size:17px}
.footer-brand p{margin:16px 0 0;max-width:36ch;font-size:14px;line-height:1.75;color:var(--c-ink-500)}
.site-footer h3{margin:0 0 14px;font-size:14px;font-weight:600;color:var(--c-ink-900)}
.site-footer ul{list-style:none;margin:0;padding:0}
.site-footer li{margin-bottom:10px}
.site-footer li a{font-size:14px;color:var(--c-ink-500)}
.site-footer li a:hover{color:var(--c-brand-600)}
.footer-bottom{
  margin-top:42px;padding-top:18px;border-top:1px solid var(--c-line);
  display:flex;flex-wrap:wrap;gap:10px;align-items:center;justify-content:space-between;
  font-size:13px;color:var(--c-ink-500);
}

/* ---------- 轻提示 ---------- */
.toast{
  position:fixed;left:50%;bottom:36px;z-index:80;
  transform:translate(-50%,18px);opacity:0;pointer-events:none;
  background:var(--c-ink-900);color:#fff;font-size:14px;line-height:1;
  padding:12px 20px;border-radius:var(--r-pill);box-shadow:var(--shadow-2);
  transition:opacity .25s ease-out,transform .25s ease-out;
}
.toast.show{opacity:1;transform:translate(-50%,0)}

/* ---------- 响应式 ---------- */
@media (max-width:1023px){
  .shell{padding-left:24px;padding-right:24px}
  .nav-links{display:none}
  .nav-search{display:none}
  .nav-toggle{display:inline-flex}
  .article-grid{grid-template-columns:minmax(0,1fr);gap:32px}
  .article-aside{position:static}
  .toc-list{max-height:none}
  .channel-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .article-wrap{padding-bottom:64px}
  .section{margin-top:52px}
}
@media (max-width:639px){
  .shell{padding-left:20px;padding-right:20px}
  .header-inner{height:56px;gap:12px}
  .brand-text b{font-size:16px}
  .brand-text span{display:none}
  .brand-mark{width:30px;height:30px;border-radius:9px;font-size:15px}
  .header-actions .btn-primary{display:none}
  .article-head h1{margin:14px 0 14px}
  .article-body h2{font-size:21px;margin:32px 0 14px}
  .article-body h3{font-size:18px;margin:24px 0 10px}
  .channel-grid{grid-template-columns:minmax(0,1fr)}
  .nextprev{grid-template-columns:minmax(0,1fr)}
  .related-list a{flex-wrap:wrap;gap:8px 10px}
  .rl-title{white-space:normal;overflow:visible;flex-basis:100%;order:3}
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:26px}
  .site-footer .shell{padding-top:40px}
  .article-foot{flex-direction:column;align-items:flex-start}
  .crumbs .current{max-width:100%;white-space:normal}
}

/* roulang page: category1 */
:root{
    --c-bg:#F5F8FC;
    --c-surface:#FFFFFF;
    --c-surface-2:#EEF4FB;
    --c-line:#DDE7F2;
    --c-ink-900:#0F1F33;
    --c-ink-700:#24384F;
    --c-ink-600:#40587A;
    --c-ink-500:#5B7290;
    --c-brand-700:#10406E;
    --c-brand-600:#16568F;
    --c-brand-500:#1E6FB8;
    --c-brand-300:#7FB3DE;
    --c-brand-50:#E8F2FB;
    --c-accent-500:#12B39A;
    --c-accent-100:#D9F5F0;
    --c-warm-500:#E8A33D;
    --r-card:14px;
    --r-btn:10px;
    --r-pill:999px;
    --r-hero:18px;
    --r-panel:20px;
    --shadow-1:0 1px 2px rgba(15,31,51,.05),0 6px 18px -10px rgba(15,31,51,.14);
    --shadow-2:0 2px 4px rgba(15,31,51,.06),0 16px 34px -16px rgba(15,31,51,.22);
    --shadow-hero:0 24px 60px -30px rgba(16,64,110,.45);
    --sec-gap:96px;
  }

  *,*::before,*::after{box-sizing:border-box;}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:100px;}
  body{
    margin:0;
    background:var(--c-bg);
    color:var(--c-ink-900);
    font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
    font-size:16px;
    line-height:1.75;
    -webkit-font-smoothing:antialiased;
  }
  img{display:block;max-width:100%;height:auto;}
  a{color:var(--c-brand-600);text-decoration:none;transition:color .18s ease,border-color .18s ease,background-color .18s ease;}
  a:hover{color:var(--c-accent-500);}
  button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
  input{font:inherit;}
  h1,h2,h3,h4{margin:0;color:var(--c-ink-900);font-weight:700;letter-spacing:.005em;line-height:1.35;}
  p{margin:0;}
  ul,ol{margin:0;padding:0;list-style:none;}
  figure{margin:0;}
  ::selection{background:var(--c-brand-50);color:var(--c-brand-700);}
  a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{
    outline:3px solid var(--c-brand-300);
    outline-offset:2px;
    border-radius:8px;
  }
  ::-webkit-scrollbar{width:10px;height:10px;}
  ::-webkit-scrollbar-thumb{background:#C9D8E8;border-radius:999px;border:2px solid var(--c-bg);}
  ::-webkit-scrollbar-track{background:var(--c-bg);}

  .skip-link{
    position:absolute;left:-9999px;top:0;z-index:200;
    background:var(--c-brand-700);color:#fff;padding:10px 18px;border-radius:0 0 10px 0;font-size:14px;
  }
  .skip-link:focus{left:0;color:#fff;}

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

  /* ============ 顶部导航 ============ */
  .site-header{
    position:sticky;top:0;z-index:50;
    background:rgba(245,248,252,.88);
    backdrop-filter:blur(8px);
    -webkit-backdrop-filter:blur(8px);
    border-bottom:1px solid transparent;
    transition:background-color .2s ease,box-shadow .2s ease,border-color .2s ease;
  }
  .site-header.is-scrolled{
    background:rgba(255,255,255,.92);
    border-bottom-color:var(--c-line);
    box-shadow:var(--shadow-1);
  }
  .header-inner{
    display:flex;
    align-items:center;
    gap:20px;
    height:64px;
  }
  .brand{
    display:flex;align-items:center;gap:10px;
    flex:none;color:var(--c-ink-900);
  }
  .brand:hover{color:var(--c-ink-900);}
  .brand-mark{
    width:34px;height:34px;flex:none;
    border-radius:10px;
    background:var(--c-brand-600);
    color:#fff;
    display:grid;place-items:center;
    font-size:17px;font-weight:700;
    box-shadow:0 8px 18px -12px rgba(22,86,143,.9);
  }
  .brand-text{display:flex;flex-direction:column;line-height:1.18;}
  .brand-text b{font-size:18px;font-weight:700;letter-spacing:.005em;}
  .brand-text span{font-size:11px;color:var(--c-ink-500);font-weight:500;}

  .nav-links{
    display:flex;align-items:center;gap:4px;
    flex:1 1 auto;min-width:0;
  }
  .nav-links a{
    position:relative;
    display:inline-flex;align-items:center;
    height:44px;padding:0 12px;
    font-size:15px;font-weight:500;
    color:var(--c-ink-700);
    border-radius:8px;
    white-space:nowrap;
    transition:color .18s ease,background-color .18s ease;
  }
  .nav-links a:hover{color:var(--c-brand-600);background:var(--c-brand-50);}
  .nav-links a.active{color:var(--c-brand-700);font-weight:600;}
  .nav-links a.active::after{
    content:"";position:absolute;left:12px;right:12px;bottom:3px;height:2px;
    background:var(--c-brand-500);border-radius:2px;
  }

  .header-actions{display:flex;align-items:center;gap:12px;margin-left:auto;flex:none;}

  .search-box{
    position:relative;
    display:flex;align-items:center;gap:8px;
    height:42px;padding:0 12px;
    background:var(--c-surface);
    border:1px solid var(--c-line);
    border-radius:var(--r-btn);
    color:var(--c-ink-500);
    transition:border-color .18s ease,box-shadow .18s ease;
  }
  .search-box:focus-within{border-color:var(--c-brand-300);box-shadow:0 0 0 3px var(--c-brand-50);}
  .search-box svg{width:16px;height:16px;flex:none;}
  .search-box input{
    border:0;outline:0;background:transparent;
    width:124px;font-size:14px;color:var(--c-ink-900);
  }
  .search-box input::placeholder{color:var(--c-ink-500);}
  .search-drop{
    position:absolute;top:calc(100% + 10px);left:0;
    width:260px;padding:14px;
    background:var(--c-surface);
    border:1px solid var(--c-line);
    border-radius:var(--r-card);
    box-shadow:var(--shadow-2);
    z-index:60;
  }
  .search-drop[hidden]{display:none;}
  .search-drop p{font-size:12px;color:var(--c-ink-500);margin-bottom:8px;}
  .search-drop a{
    display:block;padding:9px 10px;border-radius:8px;
    font-size:14px;color:var(--c-ink-700);
  }
  .search-drop a:hover{background:var(--c-surface-2);color:var(--c-brand-600);}

  .nav-toggle{
    display:none;
    width:44px;height:44px;
    border-radius:var(--r-btn);
    border:1px solid var(--c-line);
    background:var(--c-surface);
    flex-direction:column;align-items:center;justify-content:center;gap:4px;
  }
  .nav-toggle span{display:block;width:18px;height:2px;background:var(--c-ink-700);border-radius:2px;}

  /* ============ 移动抽屉 ============ */
  .drawer-mask{
    position:fixed;inset:0;z-index:75;
    background:rgba(15,31,51,.45);
    opacity:0;pointer-events:none;
    transition:opacity .28s ease;
  }
  .drawer-mask.is-open{opacity:1;pointer-events:auto;}
  .mobile-drawer{
    position:fixed;top:0;right:0;bottom:0;z-index:80;
    width:88%;max-width:360px;
    background:var(--c-surface);
    padding:22px 20px 28px;
    display:flex;flex-direction:column;gap:18px;
    overflow-y:auto;
    transform:translateX(102%);
    transition:transform .28s ease;
    box-shadow:-24px 0 60px -34px rgba(15,31,51,.55);
  }
  .mobile-drawer.is-open{transform:translateX(0);}
  .drawer-head{display:flex;align-items:center;justify-content:space-between;gap:12px;}
  .drawer-title{font-size:15px;font-weight:600;color:var(--c-ink-900);}
  .drawer-close{
    width:44px;height:44px;border-radius:var(--r-btn);
    border:1px solid var(--c-line);background:var(--c-surface-2);
    font-size:20px;line-height:1;color:var(--c-ink-700);
  }
  .drawer-nav{display:flex;flex-direction:column;gap:4px;}
  .drawer-nav a{
    display:flex;align-items:center;min-height:48px;padding:0 12px;
    border-radius:var(--r-btn);
    font-size:15px;color:var(--c-ink-700);
  }
  .drawer-nav a:hover{background:var(--c-brand-50);color:var(--c-brand-600);}
  .drawer-nav a.active{background:var(--c-brand-50);color:var(--c-brand-700);font-weight:600;}
  .drawer-search{
    display:flex;align-items:center;gap:8px;height:46px;padding:0 12px;
    border:1px solid var(--c-line);border-radius:var(--r-btn);
    background:var(--c-surface-2);color:var(--c-ink-500);
  }
  .drawer-search input{border:0;outline:0;background:transparent;width:100%;font-size:14px;color:var(--c-ink-900);}

  /* ============ 按钮 ============ */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    min-height:44px;padding:0 20px;
    border-radius:var(--r-btn);
    font-size:15px;font-weight:600;
    border:1px solid transparent;
    white-space:nowrap;
    transition:background-color .18s ease,color .18s ease,border-color .18s ease,transform .1s ease,box-shadow .18s ease;
  }
  .btn-primary{background:var(--c-brand-600);color:#fff;box-shadow:0 10px 22px -14px rgba(22,86,143,.95);}
  .btn-primary:hover{background:var(--c-brand-700);color:#fff;}
  .btn-primary:active{transform:translateY(1px);}
  .btn-ghost{background:var(--c-surface);border-color:var(--c-line);color:var(--c-ink-700);}
  .btn-ghost:hover{border-color:var(--c-brand-600);color:var(--c-brand-600);}
  .btn-ghost:active{transform:translateY(1px);}
  .btn-light{background:#fff;color:var(--c-brand-700);}
  .btn-light:hover{background:var(--c-brand-50);color:var(--c-brand-700);}
  .btn-outline-light{background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.55);color:#fff;}
  .btn-outline-light:hover{background:rgba(255,255,255,.2);border-color:#fff;color:#fff;}
  .btn-sm{min-height:40px;padding:0 16px;font-size:14px;}
  .btn-text{
    display:inline-flex;align-items:center;gap:6px;
    font-size:15px;font-weight:600;
    color:var(--c-brand-600);
    padding-bottom:3px;
    border-bottom:2px solid var(--c-brand-300);
    border-radius:0;
  }
  .btn-text:hover{color:var(--c-accent-500);border-bottom-color:var(--c-accent-500);}

  /* ============ 面包屑 ============ */
  .breadcrumb{
    display:flex;align-items:center;gap:8px;flex-wrap:wrap;
    padding:26px 0 18px;
    font-size:13px;color:var(--c-ink-500);
  }
  .breadcrumb a{color:var(--c-ink-500);}
  .breadcrumb a:hover{color:var(--c-brand-600);}
  .breadcrumb .sep{color:var(--c-brand-300);}
  .breadcrumb .current{color:var(--c-ink-500);}

  /* ============ 横幅 ============ */
  .page-banner{
    position:relative;
    display:flex;align-items:center;justify-content:space-between;gap:32px;
    min-height:220px;
    padding:32px 36px;
    border-radius:var(--r-panel);
    overflow:hidden;
    color:#fff;
    background-image:
      linear-gradient(105deg,rgba(15,31,51,.92) 0%,rgba(16,64,110,.8) 54%,rgba(18,179,154,.45) 100%),
      url('/assets/images/backpic/back-1.png');
    background-size:cover,cover;
    background-position:center,center;
    box-shadow:var(--shadow-hero);
  }
  .banner-copy{position:relative;z-index:2;max-width:660px;}
  .banner-eyebrow{
    display:inline-flex;align-items:center;gap:8px;
    font-size:12px;font-weight:600;letter-spacing:.01em;
    color:#CFE6F7;
    background:rgba(255,255,255,.14);
    border:1px solid rgba(255,255,255,.24);
    border-radius:var(--r-pill);
    padding:4px 12px;
    margin-bottom:14px;
  }
  .page-banner h1{
    color:#fff;
    font-size:clamp(26px,3vw,40px);
    line-height:1.25;
    font-weight:700;
  }
  .banner-sub{
    margin-top:12px;
    font-size:15px;line-height:1.7;
    color:rgba(255,255,255,.86);
    max-width:560px;
  }
  .banner-cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px;}
  .banner-side{
    position:relative;z-index:2;
    flex:none;
    display:flex;flex-direction:column;gap:8px;
    min-width:210px;
    padding:16px 18px;
    border-radius:var(--r-card);
    background:rgba(255,255,255,.14);
    border:1px solid rgba(255,255,255,.3);
    backdrop-filter:blur(6px);
    -webkit-backdrop-filter:blur(6px);
  }
  .banner-side .row{display:flex;align-items:center;gap:8px;}
  .status-dot{
    width:8px;height:8px;border-radius:50%;
    background:var(--c-accent-500);
    box-shadow:0 0 0 4px rgba(18,179,154,.24);
    flex:none;
  }
  .banner-side strong{font-size:15px;font-weight:600;color:#fff;}
  .banner-side small{font-size:12px;line-height:1.6;color:rgba(255,255,255,.8);}

  /* ============ 数据条 ============ */
  .stat-strip{
    display:grid;
    grid-template-columns:repeat(4,minmax(0,1fr));
    margin-top:28px;
    background:var(--c-surface);
    border:1px solid var(--c-line);
    border-radius:var(--r-card);
    box-shadow:var(--shadow-1);
    overflow:hidden;
  }
  .stat-item{padding:22px 22px;border-left:1px solid var(--c-line);}
  .stat-item:first-child{border-left:0;}
  .stat-num{
    font-size:26px;font-weight:700;line-height:1.2;
    color:var(--c-brand-700);
    font-variant-numeric:tabular-nums;
  }
  .stat-label{margin-top:6px;font-size:12px;line-height:1.6;color:var(--c-ink-600);}

  /* ============ 板块通用 ============ */
  .section{margin-top:var(--sec-gap);}
  .section-head{max-width:760px;}
  .section-head.center{margin:0 auto;text-align:center;}
  .eyebrow{
    display:inline-flex;align-items:center;gap:6px;
    font-size:12px;font-weight:600;
    color:var(--c-brand-500);
    margin-bottom:10px;
  }
  .eyebrow::before{
    content:"";width:8px;height:8px;border-radius:2px;
    background:var(--c-brand-300);
  }
  .section-head h2{font-size:clamp(23px,2.4vw,30px);line-height:1.35;font-weight:700;}
  .section-desc{margin-top:12px;font-size:15px;line-height:1.75;color:var(--c-ink-600);}

  /* ============ 目录索引 ============ */
  .index-layout{
    display:grid;
    grid-template-columns:minmax(0,1fr) minmax(0,2fr);
    gap:40px;
    margin-top:36px;
    align-items:start;
  }
  .aside-card{
    position:sticky;top:100px;
    background:var(--c-surface);
    border:1px solid var(--c-line);
    border-radius:var(--r-card);
    box-shadow:var(--shadow-1);
    padding:22px;
  }
  .aside-card h3{font-size:16px;font-weight:700;}
  .aside-card > p{margin-top:8px;font-size:13px;line-height:1.7;color:var(--c-ink-600);}
  .toc-list{margin-top:16px;display:flex;flex-direction:column;}
  .toc-list li{border-top:1px solid var(--c-line);}
  .toc-list li:first-child{border-top:0;}
  .toc-list a{
    display:flex;align-items:center;gap:10px;
    min-height:44px;padding:6px 8px;
    border-radius:8px;
    font-size:14px;color:var(--c-ink-700);
  }
  .toc-list a:hover{background:var(--c-surface-2);color:var(--c-brand-600);}
  .toc-list a span{
    font-size:12px;font-weight:700;
    color:var(--c-brand-300);
    font-variant-numeric:tabular-nums;
    transition:color .18s ease;
  }
  .toc-list a:hover span{color:var(--c-accent-500);}
  .aside-card .btn-text{margin-top:18px;font-size:14px;}

  .index-main{border-top:1px solid var(--c-line);}
  .index-item{
    display:grid;
    grid-template-columns:64px minmax(0,1fr) 32px;
    gap:20px;align-items:center;
    padding:22px 16px;
    border-bottom:1px solid var(--c-line);
    transition:background-color .18s ease;
    scroll-margin-top:110px;
  }
  .index-item:hover{background:var(--c-surface-2);}
  .index-num{
    font-size:26px;font-weight:700;line-height:1;
    color:var(--c-brand-300);
    font-variant-numeric:tabular-nums;
    transition:color .18s ease;
  }
  .index-item:hover .index-num{color:var(--c-accent-500);}
  .index-item h3{font-size:18px;font-weight:600;line-height:1.5;}
  .index-item p{margin-top:6px;font-size:14px;line-height:1.7;color:var(--c-ink-600);}
  .index-arrow{
    display:grid;place-items:center;
    width:32px;height:32px;border-radius:50%;
    background:var(--c-surface);
    border:1px solid var(--c-line);
    color:var(--c-brand-500);
    font-size:15px;
    transition:transform .18s ease,border-color .18s ease,color .18s ease;
  }
  .index-item:hover .index-arrow{
    transform:translateX(2px);
    border-color:var(--c-brand-300);
    color:var(--c-accent-500);
  }

  /* ============ 核对图文 ============ */
  .check-layout{
    display:grid;
    grid-template-columns:minmax(0,1fr) minmax(0,1fr);
    gap:48px;
    align-items:center;
  }
  .check-figure{
    position:relative;
    border-radius:var(--r-hero);
    overflow:hidden;
    box-shadow:var(--shadow-2);
  }
  .check-figure img{width:100%;aspect-ratio:4/3;object-fit:cover;}
  .check-figure figcaption{
    position:absolute;left:0;right:0;bottom:0;
    padding:28px 20px 14px;
    font-size:12px;color:rgba(255,255,255,.9);
    background:linear-gradient(180deg,rgba(15,31,51,0) 0%,rgba(15,31,51,.78) 100%);
  }
  .check-body h2{font-size:clamp(23px,2.4vw,30px);line-height:1.35;}
  .square-list{margin-top:8px;}
  .square-list li{
    position:relative;
    padding-left:22px;
    margin-top:16px;
    font-size:15px;line-height:1.7;color:var(--c-ink-600);
  }
  .square-list li::before{
    content:"";position:absolute;left:0;top:9px;
    width:8px;height:8px;border-radius:2px;
    background:var(--c-brand-500);
  }
  .square-list li strong{display:block;font-size:16px;font-weight:600;color:var(--c-ink-900);margin-bottom:2px;}

  /* ============ 关联栏目 ============ */
  .rel-list{
    margin-top:32px;
    background:var(--c-surface);
    border:1px solid var(--c-line);
    border-radius:var(--r-card);
    overflow:hidden;
    box-shadow:var(--shadow-1);
  }
  .rel-list li + li{border-top:1px solid var(--c-line);}
  .rel-list a{
    display:flex;align-items:center;justify-content:space-between;gap:20px;
    min-height:64px;padding:14px 22px;
    color:var(--c-ink-900);
    transition:background-color .18s ease;
  }
  .rel-list a:hover{background:var(--c-surface-2);color:var(--c-ink-900);}
  .rel-list .rel-title{font-size:16px;font-weight:600;}
  .rel-list .rel-desc{display:block;margin-top:4px;font-size:13px;color:var(--c-ink-600);font-weight:400;}
  .rel-list .rel-go{
    flex:none;font-size:13px;font-weight:600;color:var(--c-brand-600);
    display:inline-flex;align-items:center;gap:6px;
  }
  .rel-list a:hover .rel-go{color:var(--c-accent-500);}

  /* ============ FAQ ============ */
  .faq{
    max-width:760px;margin:32px auto 0;
    border-top:1px solid var(--c-line);
  }
  .faq-item{border-bottom:1px solid var(--c-line);}
  .faq-item summary{
    display:flex;align-items:center;justify-content:space-between;gap:16px;
    min-height:56px;padding:14px 4px;
    font-size:16px;font-weight:600;color:var(--c-ink-900);
    cursor:pointer;list-style:none;
    transition:color .18s ease;
  }
  .faq-item summary::-webkit-details-marker{display:none;}
  .faq-item summary:hover{color:var(--c-brand-600);}
  .faq-item summary::after{
    content:"+";
    flex:none;
    font-size:22px;font-weight:400;line-height:1;
    color:var(--c-brand-500);
    transition:color .18s ease;
  }
  .faq-item[open] summary::after{content:"−";color:var(--c-accent-500);}
  .faq-body{padding:0 4px 20px;font-size:15px;line-height:1.75;color:var(--c-ink-600);}

  /* ============ CTA ============ */
  .cta-panel{
    position:relative;
    display:flex;align-items:center;justify-content:space-between;gap:32px;
    flex-wrap:wrap;
    padding:40px 44px;
    border-radius:var(--r-panel);
    background:var(--c-surface-2);
    border:1px solid var(--c-line);
    overflow:hidden;
  }
  .cta-copy{position:relative;z-index:2;max-width:620px;}
  .cta-copy h2{font-size:clamp(22px,2.2vw,28px);line-height:1.35;}
  .cta-copy p{margin-top:12px;font-size:15px;line-height:1.75;color:var(--c-ink-600);}
  .cta-actions{position:relative;z-index:2;display:flex;flex-wrap:wrap;gap:12px;}
  .cta-wave{
    position:absolute;right:-20px;bottom:-24px;
    width:320px;height:180px;
    opacity:.5;pointer-events:none;
    z-index:1;
  }

  /* ============ 页脚 ============ */
  .site-footer{
    margin-top:var(--sec-gap);
    background:var(--c-surface);
    border-top:1px solid var(--c-line);
    padding:56px 0 26px;
  }
  .footer-grid{
    display:grid;
    grid-template-columns:1.7fr 1fr 1fr 1fr;
    gap:36px;
  }
  .footer-brand .brand{margin-bottom:16px;}
  .footer-brand p{font-size:14px;line-height:1.75;color:var(--c-ink-600);max-width:360px;}
  .site-footer h3{font-size:14px;font-weight:600;color:var(--c-ink-900);margin-bottom:14px;}
  .site-footer ul{display:flex;flex-direction:column;gap:10px;}
  .site-footer ul a{font-size:14px;color:var(--c-ink-600);}
  .site-footer ul a:hover{color:var(--c-brand-600);}
  .footer-bottom{
    display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
    margin-top:44px;padding-top:20px;
    border-top:1px solid var(--c-line);
    font-size:13px;color:var(--c-ink-500);
  }

  /* ============ 响应式 ============ */
  @media (max-width:1024px){
    :root{--sec-gap:72px;}
    .shell{padding:0 24px;}
    .nav-links,.search-box{display:none;}
    .nav-toggle{display:flex;}
    .index-layout{grid-template-columns:1fr;gap:28px;}
    .aside-card{position:static;}
    .check-layout{grid-template-columns:1fr;gap:32px;}
    .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
  }
  @media (max-width:768px){
    :root{--sec-gap:56px;}
    .header-inner{height:56px;gap:12px;}
    .brand-mark{width:30px;height:30px;font-size:15px;}
    .brand-text b{font-size:16px;}
    .brand-text span{display:none;}
    .page-banner{
      flex-direction:column;align-items:flex-start;justify-content:center;
      min-height:240px;padding:28px 22px;gap:20px;
    }
    .banner-side{min-width:0;width:100%;}
    .stat-strip{grid-template-columns:1fr 1fr;}
    .stat-item{border-left:1px solid var(--c-line);}
    .stat-item:nth-child(odd){border-left:0;}
    .stat-item:nth-child(n+3){border-top:1px solid var(--c-line);}
    .index-item{
      grid-template-columns:38px minmax(0,1fr);
      gap:14px;padding:20px 8px;
    }
    .index-num{font-size:20px;}
    .index-arrow{display:none;}
    .cta-panel{padding:30px 24px;}
    .footer-grid{grid-template-columns:1fr;gap:26px;}
    .footer-bottom{flex-direction:column;align-items:flex-start;}
  }
  @media (max-width:640px){
    .shell{padding:0 20px;}
  }
  @media (max-width:520px){
    .stat-strip{grid-template-columns:1fr;}
    .stat-item{border-left:0;}
    .stat-item + .stat-item{border-top:1px solid var(--c-line);}
    .btn{width:100%;}
    .banner-cta{width:100%;}
    .cta-actions{width:100%;}
  }

/* roulang page: category2 */
:root{
  --c-bg:#F5F8FC;--c-surface:#FFFFFF;--c-surface-2:#EEF4FB;--c-line:#DDE7F2;
  --c-ink-900:#0F1F33;--c-ink-700:#24384F;--c-ink-500:#5B7290;
  --c-brand-700:#10406E;--c-brand-600:#16568F;--c-brand-500:#1E6FB8;--c-brand-300:#7FB3DE;--c-brand-50:#E8F2FB;
  --c-accent-500:#12B39A;--c-accent-100:#D9F5F0;--c-warm-500:#E8A33D;
  --r-card:14px;--r-btn:10px;--r-pill:999px;--r-hero:18px;--r-band:20px;
  --shadow-1:0 1px 2px rgba(15,31,51,.05),0 6px 18px -10px rgba(15,31,51,.14);
  --shadow-2:0 2px 4px rgba(15,31,51,.06),0 16px 34px -16px rgba(15,31,51,.22);
  --shadow-hero:0 24px 60px -30px rgba(16,64,110,.45);
  --shell:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
.site-body{
  margin:0;background:var(--c-bg);color:var(--c-ink-700);
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  font-size:16px;line-height:1.75;-webkit-font-smoothing:antialiased;
}
.site-body.no-scroll{overflow:hidden}
.site-body h1,.site-body h2,.site-body h3,.site-body h4{margin:0;color:var(--c-ink-900);letter-spacing:0}
.site-body p{margin:0}
.site-body img{display:block;max-width:100%}
.site-body ul,.site-body ol{margin:0;padding:0;list-style:none}
.site-body button{font-family:inherit}
.site-body input{font-family:inherit}
.site-body b,.site-body strong{font-weight:650}
.site-body a:focus-visible,.site-body button:focus-visible,.site-body input:focus-visible,.site-body summary:focus-visible{
  outline:3px solid var(--c-brand-300);outline-offset:2px;border-radius:4px;
}
.shell{width:100%;max-width:var(--shell);margin:0 auto;padding:0 32px}
@media(max-width:1024px){.shell{padding:0 24px}}
@media(max-width:640px){.shell{padding:0 20px}}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(255,255,255,.94);backdrop-filter:blur(8px);
  border-bottom:1px solid var(--c-line);
  transition:box-shadow .2s ease-out,background .2s ease-out;
}
.site-header.is-scrolled{box-shadow:var(--shadow-1)}
.header-inner{display:flex;align-items:center;gap:24px;height:64px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;flex-shrink:0}
.brand-mark{
  width:36px;height:36px;border-radius:10px;background:var(--c-brand-600);color:#fff;
  display:grid;place-items:center;font-size:17px;font-weight:700;line-height:1;
}
.brand-text{display:flex;flex-direction:column;line-height:1.2}
.brand-text b{font-size:18px;font-weight:700;color:var(--c-ink-900)}
.brand-text span{font-size:12px;color:var(--c-ink-500)}
.nav-links{display:flex;align-items:center;gap:2px;margin-left:6px}
.nav-links a{
  position:relative;display:inline-flex;align-items:center;height:64px;padding:0 12px;
  font-size:15px;color:var(--c-ink-700);text-decoration:none;transition:color .18s ease-out;
}
.nav-links a::after{
  content:"";position:absolute;left:12px;right:12px;bottom:14px;height:2px;
  background:var(--c-brand-600);transform:scaleX(0);transform-origin:left;
  transition:transform .18s ease-out;
}
.nav-links a:hover{color:var(--c-brand-600)}
.nav-links a:hover::after,.nav-links a.active::after{transform:scaleX(1)}
.nav-links a.active{color:var(--c-brand-700);font-weight:600}
.header-actions{display:flex;align-items:center;gap:12px;margin-left:auto}
.search-form{
  display:flex;align-items:center;gap:4px;height:44px;padding:0 6px 0 16px;
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-pill);
  transition:border-color .18s ease-out,box-shadow .18s ease-out;
}
.search-form:focus-within{border-color:var(--c-brand-300);box-shadow:0 0 0 3px var(--c-brand-50)}
.search-form input{
  width:132px;border:0;outline:0;background:transparent;font-size:14px;color:var(--c-ink-700);
}
.search-form input::placeholder{color:var(--c-ink-500)}
.search-form button{
  display:grid;place-items:center;width:34px;height:34px;border:0;border-radius:var(--r-pill);
  background:var(--c-brand-50);color:var(--c-brand-600);cursor:pointer;transition:background .18s ease-out,color .18s ease-out;
}
.search-form button:hover{background:var(--c-brand-600);color:#fff}
.nav-toggle{
  display:none;align-items:center;justify-content:center;width:44px;height:44px;
  border:1px solid var(--c-line);border-radius:var(--r-btn);background:var(--c-surface);
  color:var(--c-ink-700);cursor:pointer;
}
.nav-toggle:hover{border-color:var(--c-brand-600);color:var(--c-brand-600)}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:var(--r-btn);border:1px solid transparent;
  font-size:15px;font-weight:600;text-decoration:none;cursor:pointer;
  transition:background .18s ease-out,color .18s ease-out,border-color .18s ease-out,transform .12s ease-out,box-shadow .18s ease-out;
}
.btn-sm{height:44px;padding:0 18px;font-size:14px}
.btn-primary{background:var(--c-brand-600);color:#fff;box-shadow:0 10px 20px -14px rgba(16,64,110,.85)}
.btn-primary:hover{background:var(--c-brand-700)}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{background:var(--c-surface);color:var(--c-ink-700);border-color:var(--c-line)}
.btn-ghost:hover{border-color:var(--c-brand-600);color:var(--c-brand-600)}
.btn-text{
  height:auto;padding:4px 0;border-radius:0;color:var(--c-brand-600);
  border-bottom:2px solid var(--c-brand-300);font-weight:600;font-size:14.5px;
}
.btn-text:hover{color:var(--c-accent-500);border-bottom-color:var(--c-accent-500)}

/* ---------- 徽章 ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;height:26px;padding:0 12px;
  border-radius:var(--r-pill);font-size:12px;line-height:1.4;font-weight:600;
  background:var(--c-brand-50);color:var(--c-brand-700);
}
.badge-light{background:rgba(255,255,255,.16);color:#fff;border:1px solid rgba(255,255,255,.32)}
.badge-accent{background:var(--c-accent-100);color:#0B6A5C}
.badge-warm{background:#FBF0DC;color:#8A5A11}

/* ---------- 面包屑 ---------- */
.breadcrumb-bar{background:var(--c-surface);border-bottom:1px solid var(--c-line)}
.breadcrumb-bar ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;padding:12px 0}
.breadcrumb-bar a{color:var(--c-ink-500);text-decoration:none;transition:color .18s ease-out}
.breadcrumb-bar a:hover{color:var(--c-brand-600)}
.breadcrumb-bar .sep{color:var(--c-line)}
.breadcrumb-bar .current{color:var(--c-ink-500)}

/* ---------- 横幅 ---------- */
.page-banner{padding:24px 0 4px}
.banner-inner{
  position:relative;display:flex;flex-direction:column;justify-content:center;gap:14px;
  min-height:220px;padding:40px 44px;border-radius:var(--r-band);overflow:hidden;
  background-image:linear-gradient(102deg,rgba(15,31,51,.88) 0%,rgba(16,64,110,.66) 58%,rgba(18,179,154,.42) 100%),url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;box-shadow:var(--shadow-hero);
}
.banner-inner h1{font-size:40px;line-height:1.25;font-weight:700;color:#fff;max-width:19em}
.banner-inner p{font-size:16px;line-height:1.75;color:rgba(255,255,255,.88);max-width:44em}

/* ---------- 板块 ---------- */
.section{padding:96px 0}
.section-tight{padding:56px 0 0}
.section-alt{background:var(--c-surface)}
.section-head{max-width:44em;margin-bottom:40px}
.section-head h2{font-size:30px;line-height:1.35;font-weight:650}
.section-head p{margin-top:12px;font-size:15.5px;color:var(--c-ink-500)}
.section-head-row{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap;margin-bottom:40px}
.section-head-row .section-head{margin-bottom:0}

/* ---------- 数据条 ---------- */
.facts{
  display:grid;grid-template-columns:repeat(4,1fr);
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
  box-shadow:var(--shadow-1);overflow:hidden;
}
.fact{padding:28px 24px;border-left:1px solid var(--c-line)}
.fact:first-child{border-left:0}
.fact b{
  display:block;font-size:32px;line-height:1.2;font-weight:700;color:var(--c-brand-700);
  font-variant-numeric:tabular-nums;
}
.fact span{display:block;margin-top:6px;font-size:12.5px;color:var(--c-ink-500)}
.facts-note{margin-top:14px;font-size:13px;color:var(--c-ink-500)}

/* ---------- 卡片矩阵 ---------- */
.matrix{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.mcard{
  display:flex;flex-direction:column;background:var(--c-surface);
  border:1px solid var(--c-line);border-radius:var(--r-card);box-shadow:var(--shadow-1);
  overflow:hidden;transition:transform .18s ease-out,box-shadow .18s ease-out,border-color .18s ease-out;
}
.mcard:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);border-color:var(--c-brand-300)}
.mcard figure{margin:0;aspect-ratio:16/9;overflow:hidden;background:var(--c-brand-50)}
.mcard figure img{width:100%;height:100%;object-fit:cover}
.mcard-body{padding:22px 24px 24px}
.mcard-body h3{font-size:20px;line-height:1.5;font-weight:600}
.mcard-body .mcard-tag{margin-bottom:10px}
.points{margin-top:14px;display:grid;gap:9px}
.points li{position:relative;padding-left:20px;font-size:14.5px;line-height:1.7;color:var(--c-ink-700)}
.points li::before{
  content:"";position:absolute;left:0;top:9px;width:7px;height:7px;
  background:var(--c-accent-500);border-radius:2px;
}

/* ---------- 场景清单 ---------- */
.scene-list{border-top:1px solid var(--c-line)}
.scene{
  display:flex;align-items:flex-start;gap:20px;padding:22px 4px;
  border-bottom:1px solid var(--c-line);transition:background .18s ease-out;
}
.scene:hover{background:var(--c-surface-2)}
.scene-idx{
  flex-shrink:0;width:44px;height:44px;border-radius:12px;background:var(--c-brand-50);
  color:var(--c-brand-700);display:grid;place-items:center;
  font-size:15px;font-weight:700;font-variant-numeric:tabular-nums;
}
.scene-text h3{font-size:17px;line-height:1.5;font-weight:600}
.scene-text p{margin-top:6px;font-size:14.5px;color:var(--c-ink-500)}

/* ---------- 步骤 ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.step{
  position:relative;background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:var(--r-card);padding:26px 22px 24px;box-shadow:var(--shadow-1);
  transition:transform .18s ease-out,box-shadow .18s ease-out,border-color .18s ease-out;
}
.step:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);border-color:var(--c-brand-300)}
.step .num{
  display:block;font-size:30px;font-weight:700;line-height:1;
  color:var(--c-brand-300);font-variant-numeric:tabular-nums;
}
.step h3{margin-top:14px;font-size:17px;font-weight:600;line-height:1.5}
.step p{margin-top:8px;font-size:14px;color:var(--c-ink-500);line-height:1.7}

/* ---------- 栏目入口卡 ---------- */
.topic-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.topic-card{
  display:flex;flex-direction:column;gap:10px;padding:26px 24px 24px;
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
  box-shadow:var(--shadow-1);text-decoration:none;
  transition:transform .18s ease-out,box-shadow .18s ease-out,border-color .18s ease-out;
}
.topic-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);border-color:var(--c-brand-300)}
.topic-card h3{font-size:18px;font-weight:600;color:var(--c-ink-900)}
.topic-card p{font-size:14.5px;color:var(--c-ink-500);line-height:1.7}
.topic-card .arrow{
  margin-top:auto;font-size:15px;font-weight:600;color:var(--c-brand-600);
  display:inline-flex;align-items:center;gap:6px;
}
.topic-card:hover .arrow{color:var(--c-accent-500)}

/* ---------- FAQ ---------- */
.faq{max-width:760px;margin:0 auto;display:grid;gap:12px}
.faq details{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
  box-shadow:var(--shadow-1);overflow:hidden;transition:border-color .18s ease-out;
}
.faq details[open]{border-color:var(--c-brand-300)}
.faq summary{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  min-height:56px;padding:16px 22px;cursor:pointer;list-style:none;
  font-size:16px;font-weight:600;color:var(--c-ink-900);
}
.faq summary::-webkit-details-marker{display:none}
.faq summary:focus{outline:none}
.faq .ico{
  position:relative;flex-shrink:0;width:22px;height:22px;border-radius:var(--r-pill);
  background:var(--c-brand-50);transition:background .18s ease-out;
}
.faq .ico::before,.faq .ico::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--c-brand-600);
  transform:translate(-50%,-50%);transition:transform .18s ease-out,background .18s ease-out;
}
.faq .ico::before{width:10px;height:2px}
.faq .ico::after{width:2px;height:10px}
.faq details[open] .ico{background:var(--c-accent-100)}
.faq details[open] .ico::before{background:var(--c-accent-500)}
.faq details[open] .ico::after{transform:translate(-50%,-50%) scaleY(0);background:var(--c-accent-500)}
.faq .faq-body{padding:0 22px 22px;font-size:15px;line-height:1.75;color:var(--c-ink-700)}

/* ---------- CTA ---------- */
.cta-band{
  display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;
  padding:40px 44px;background:var(--c-surface-2);border:1px solid var(--c-line);
  border-radius:var(--r-band);
}
.cta-copy h2{font-size:28px;line-height:1.35;font-weight:650}
.cta-copy p{margin-top:10px;font-size:15px;color:var(--c-ink-500);max-width:34em}
.cta-actions{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.share-group{display:flex;align-items:center;gap:10px;margin-left:6px}
.share-group button{
  width:44px;height:44px;border-radius:var(--r-pill);border:1px solid var(--c-line);
  background:var(--c-surface);color:var(--c-ink-700);display:grid;place-items:center;
  cursor:pointer;transition:background .18s ease-out,color .18s ease-out,border-color .18s ease-out,transform .18s ease-out;
}
.share-group button:hover{background:var(--c-brand-600);border-color:var(--c-brand-600);color:#fff;transform:translateY(-2px)}

/* ---------- 页脚 ---------- */
.site-footer{margin-top:96px;background:var(--c-surface);border-top:1px solid var(--c-line);padding:56px 0 24px}
.footer-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1fr;gap:36px}
.footer-grid h3{font-size:14px;font-weight:600;color:var(--c-ink-900);margin-bottom:14px}
.footer-grid ul{display:grid;gap:10px}
.footer-grid ul a{font-size:14px;color:var(--c-ink-500);text-decoration:none;transition:color .18s ease-out}
.footer-grid ul a:hover{color:var(--c-brand-600)}
.footer-brand p{margin-top:16px;font-size:14px;line-height:1.8;color:var(--c-ink-500);max-width:36em}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  margin-top:36px;padding-top:20px;border-top:1px solid var(--c-line);
  font-size:13px;color:var(--c-ink-500);
}
.site-footer .brand-text b{font-size:17px}

/* ---------- 移动端抽屉 ---------- */
.drawer-mask{
  position:fixed;inset:0;z-index:60;background:rgba(15,31,51,.45);
  opacity:0;visibility:hidden;transition:opacity .2s ease-out,visibility .2s ease-out;
}
.drawer-mask.is-open{opacity:1;visibility:visible}
.drawer{
  position:fixed;top:0;right:0;z-index:70;width:88%;max-width:360px;height:100%;
  background:var(--c-surface);border-left:1px solid var(--c-line);
  box-shadow:var(--shadow-2);padding:20px;
  transform:translateX(100%);transition:transform .24s ease-out;
  display:flex;flex-direction:column;gap:18px;overflow-y:auto;
}
.drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between}
.drawer-title{font-size:15px;font-weight:600;color:var(--c-ink-900)}
.drawer-close{
  width:44px;height:44px;border:1px solid var(--c-line);border-radius:var(--r-btn);
  background:var(--c-surface);color:var(--c-ink-700);font-size:20px;line-height:1;cursor:pointer;
}
.drawer-close:hover{border-color:var(--c-brand-600);color:var(--c-brand-600)}
.drawer-links{display:grid;gap:4px}
.drawer-links a{
  display:flex;align-items:center;min-height:48px;padding:0 14px;border-radius:var(--r-btn);
  font-size:15px;color:var(--c-ink-700);text-decoration:none;transition:background .18s ease-out,color .18s ease-out;
}
.drawer-links a:hover{background:var(--c-surface-2);color:var(--c-brand-600)}
.drawer-links a.active{background:var(--c-brand-50);color:var(--c-brand-700);font-weight:600}
.drawer-search{display:flex;gap:8px}
.drawer-search input{
  flex:1;height:44px;padding:0 14px;border:1px solid var(--c-line);border-radius:var(--r-btn);
  background:var(--c-surface);font-size:14px;color:var(--c-ink-700);outline:none;
}
.drawer-search input:focus{border-color:var(--c-brand-300);box-shadow:0 0 0 3px var(--c-brand-50)}
.drawer-search button{
  height:44px;padding:0 16px;border:0;border-radius:var(--r-btn);
  background:var(--c-brand-600);color:#fff;font-size:14px;font-weight:600;cursor:pointer;
}
.drawer-cta{margin-top:auto}

/* ---------- 响应式 ---------- */
@media(max-width:1180px){
  .search-form{display:none}
}
@media(max-width:1023px){
  .nav-links{display:none}
  .nav-toggle{display:inline-flex}
  .section{padding:72px 0}
  .section-tight{padding:40px 0 0}
  .banner-inner{padding:36px 32px;min-height:200px}
  .banner-inner h1{font-size:32px}
  .facts{grid-template-columns:repeat(2,1fr)}
  .fact:nth-child(3){border-left:0}
  .fact:nth-child(1),.fact:nth-child(2){border-bottom:1px solid var(--c-line)}
  .steps{grid-template-columns:repeat(2,1fr)}
  .topic-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1.6fr 1fr 1fr}
  .footer-brand{grid-column:1 / -1}
}
@media(max-width:768px){
  .header-inner{height:56px;gap:16px}
  .brand-text b{font-size:16.5px}
  .brand-text span{font-size:11.5px}
  .matrix{grid-template-columns:1fr}
  .cta-band{padding:32px 26px}
  .cta-copy h2{font-size:23px}
  .section-head h2{font-size:24px}
  .banner-inner h1{font-size:27px}
  .banner-inner p{font-size:15px}
  .site-footer{margin-top:72px;padding:44px 0 20px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
}
@media(max-width:520px){
  .section{padding:56px 0}
  .section-tight{padding:32px 0 0}
  .banner-inner{padding:28px 22px;min-height:180px;gap:10px}
  .banner-inner h1{font-size:23px}
  .facts{grid-template-columns:1fr}
  .fact{border-left:0;border-top:1px solid var(--c-line)}
  .fact:first-child{border-top:0}
  .fact:nth-child(2){border-bottom:0}
  .steps{grid-template-columns:1fr}
  .topic-grid{grid-template-columns:1fr}
  .scene{flex-direction:row;gap:14px}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px}
  .cta-band{padding:26px 20px}
  .share-group{margin-left:0}
}

/* roulang page: category3 */
:root{
  --c-bg:#F5F8FC;
  --c-surface:#FFFFFF;
  --c-surface-2:#EEF4FB;
  --c-line:#DDE7F2;
  --c-ink-900:#0F1F33;
  --c-ink-700:#24384F;
  --c-ink-500:#5B7290;
  --c-brand-700:#10406E;
  --c-brand-600:#16568F;
  --c-brand-500:#1E6FB8;
  --c-brand-300:#7FB3DE;
  --c-brand-50:#E8F2FB;
  --c-accent-500:#12B39A;
  --c-accent-100:#D9F5F0;
  --c-warm-500:#E8A33D;
  --r-card:14px;
  --r-btn:10px;
  --r-pill:999px;
  --r-hero:18px;
  --r-band:20px;
  --shadow-1:0 1px 2px rgba(15,31,51,.05),0 6px 18px -10px rgba(15,31,51,.14);
  --shadow-2:0 2px 4px rgba(15,31,51,.06),0 16px 34px -16px rgba(15,31,51,.22);
  --shadow-hero:0 24px 60px -30px rgba(16,64,110,.45);
  --font:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.75;
  color:var(--c-ink-700);
  background:var(--c-bg);
  font-variant-numeric:tabular-nums;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{margin:0;color:var(--c-ink-900);font-weight:700;letter-spacing:.01em}
p{margin:0}
a{color:var(--c-brand-600);text-decoration:none;transition:color .18s ease-out}
a:hover{color:var(--c-accent-500)}
img{max-width:100%;display:block}
ul,ol{margin:0;padding:0;list-style:none}
button{font-family:inherit;cursor:pointer}
input{font-family:inherit}
:focus-visible{outline:3px solid var(--c-brand-300);outline-offset:2px;border-radius:6px}
.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}
.skip-link{position:absolute;left:-9999px;top:0;z-index:120;background:var(--c-brand-600);color:#fff;padding:10px 16px;border-radius:0 0 10px 0}
.skip-link:focus{left:0;color:#fff}
.shell{width:100%;max-width:1200px;margin:0 auto;padding-left:32px;padding-right:32px}

/* ============ 导航 ============ */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(255,255,255,.92);
  -webkit-backdrop-filter:blur(8px);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--c-line);
  transition:box-shadow .18s ease-out,background .18s ease-out;
}
.site-header.is-scrolled{background:rgba(255,255,255,.96);box-shadow:var(--shadow-1)}
.header-inner{display:flex;align-items:center;gap:22px;height:64px}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;color:var(--c-ink-900)}
.brand:hover{color:var(--c-ink-900)}
.brand-mark{
  width:36px;height:36px;border-radius:10px;flex:0 0 auto;
  background:var(--c-brand-600);color:#fff;
  display:grid;place-items:center;font-size:18px;font-weight:700;
  box-shadow:0 6px 16px -8px rgba(16,64,110,.7);
}
.brand-text b{display:block;font-size:18px;font-weight:700;line-height:1.2;color:var(--c-ink-900)}
.brand-text span{display:block;font-size:11px;color:var(--c-ink-500);letter-spacing:.02em;line-height:1.4}
.nav-links{display:flex;align-items:center;gap:2px;margin-left:6px}
.nav-links a{
  position:relative;display:inline-flex;align-items:center;
  height:44px;padding:0 13px;font-size:15px;
  color:var(--c-ink-700);border-radius:8px;
  transition:color .18s ease-out,background .18s ease-out;
}
.nav-links a:hover{color:var(--c-brand-600);background:var(--c-brand-50)}
.nav-links a.active{color:var(--c-brand-700);font-weight:600}
.nav-links a.active::after{
  content:"";position:absolute;left:13px;right:13px;bottom:5px;height:2px;
  background:var(--c-brand-500);border-radius:2px;
}
.header-actions{margin-left:auto;display:flex;align-items:center;gap:12px}
.nav-search{
  display:flex;align-items:center;gap:6px;height:40px;min-width:210px;
  padding:0 6px 0 14px;background:var(--c-surface-2);
  border:1px solid var(--c-line);border-radius:var(--r-pill);
  transition:border-color .18s ease-out,background .18s ease-out;
}
.nav-search:focus-within{border-color:var(--c-brand-300);background:#fff}
.nav-search input{
  width:100%;height:38px;border:0;background:transparent;
  font-size:14px;color:var(--c-ink-900);outline:none;
}
.nav-search input::placeholder{color:var(--c-ink-500)}
.nav-search button{
  width:30px;height:30px;flex:0 0 auto;border:0;border-radius:999px;
  background:var(--c-brand-600);color:#fff;display:grid;place-items:center;
  transition:background .18s ease-out;
}
.nav-search button:hover{background:var(--c-brand-700)}
.nav-search svg{width:15px;height:15px}
.nav-toggle{
  display:none;width:44px;height:44px;align-items:center;justify-content:center;
  border:1px solid var(--c-line);border-radius:10px;background:#fff;
}
.nav-toggle-bars{position:relative;display:block;width:18px;height:2px;background:var(--c-ink-700);border-radius:2px}
.nav-toggle-bars::before,.nav-toggle-bars::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--c-ink-700);border-radius:2px;
}
.nav-toggle-bars::before{top:-6px}
.nav-toggle-bars::after{top:6px}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 22px;border:1px solid transparent;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;line-height:1;cursor:pointer;
  transition:background .18s ease-out,color .18s ease-out,border-color .18s ease-out,transform .12s ease-out,box-shadow .18s ease-out;
}
.btn-primary{background:var(--c-brand-600);color:#fff;box-shadow:0 10px 24px -14px rgba(16,64,110,.9)}
.btn-primary:hover{background:var(--c-brand-700);color:#fff}
.btn-primary:active{transform:translateY(1px)}
.btn-secondary{background:#fff;border-color:var(--c-line);color:var(--c-ink-700)}
.btn-secondary:hover{border-color:var(--c-brand-600);color:var(--c-brand-600);background:#fff}
.btn-secondary:active{transform:translateY(1px)}
.btn-sm{min-height:40px;padding:0 16px;font-size:14px}
.btn-text{
  display:inline-flex;align-items:center;gap:6px;background:none;border:0;padding:0 0 2px;
  color:var(--c-brand-600);font-size:14px;font-weight:600;
  border-bottom:2px solid var(--c-brand-300);border-radius:0;
  transition:color .18s ease-out,border-color .18s ease-out;
}
.btn-text:hover{color:var(--c-accent-500);border-color:var(--c-accent-500)}
.badge{
  display:inline-flex;align-items:center;gap:6px;height:26px;padding:0 12px;
  border-radius:var(--r-pill);font-size:12px;font-weight:600;line-height:1.4;
}
.badge-brand{background:var(--c-brand-50);color:var(--c-brand-700)}
.badge-accent{background:var(--c-accent-100);color:#0C7C6B}
.badge-glass{background:rgba(255,255,255,.18);border:1px solid rgba(255,255,255,.4);color:#fff}

/* ============ 移动抽屉 ============ */
.drawer{position:fixed;inset:0;z-index:90;visibility:hidden;pointer-events:none}
.drawer.is-open{visibility:visible;pointer-events:auto}
.drawer-mask{position:absolute;inset:0;background:rgba(15,31,51,.45);opacity:0;transition:opacity .2s ease-out}
.drawer.is-open .drawer-mask{opacity:1}
.drawer-panel{
  position:absolute;top:0;right:0;height:100%;width:88%;max-width:360px;
  background:#fff;padding:22px 20px 32px;overflow-y:auto;
  transform:translateX(100%);transition:transform .24s ease-out;
  box-shadow:-20px 0 50px -30px rgba(15,31,51,.5);
}
.drawer.is-open .drawer-panel{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;gap:12px;padding-bottom:16px;border-bottom:1px solid var(--c-line)}
.drawer-title{font-size:16px;font-weight:700;color:var(--c-ink-900)}
.drawer-close{
  width:40px;height:40px;border:1px solid var(--c-line);border-radius:10px;
  background:#fff;color:var(--c-ink-700);font-size:20px;line-height:1;
}
.drawer-close:hover{border-color:var(--c-brand-600);color:var(--c-brand-600)}
.drawer-search{display:flex;gap:8px;margin:18px 0}
.drawer-search input{
  flex:1;height:44px;padding:0 14px;font-size:14px;color:var(--c-ink-900);
  background:var(--c-surface-2);border:1px solid var(--c-line);border-radius:10px;outline:none;
}
.drawer-search input:focus{border-color:var(--c-brand-300);background:#fff}
.drawer-search button{
  height:44px;padding:0 18px;border:0;border-radius:10px;
  background:var(--c-brand-600);color:#fff;font-size:14px;font-weight:600;
}
.drawer-nav{display:grid;gap:4px;margin-bottom:20px}
.drawer-nav a{
  display:flex;align-items:center;min-height:48px;padding:0 14px;
  font-size:15px;color:var(--c-ink-700);border-radius:10px;
  border:1px solid transparent;
}
.drawer-nav a:hover{background:var(--c-brand-50);color:var(--c-brand-600)}
.drawer-nav a.active{background:var(--c-brand-50);color:var(--c-brand-700);font-weight:600;border-color:var(--c-brand-300)}
.drawer-cta{width:100%}

/* ============ 面包屑与横幅 ============ */
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  padding:22px 0 16px;font-size:13px;color:var(--c-ink-500);
}
.breadcrumb a{color:var(--c-ink-500)}
.breadcrumb a:hover{color:var(--c-brand-600)}
.crumb-sep{color:var(--c-brand-300)}
.cat-banner{
  position:relative;border-radius:var(--r-band);overflow:hidden;
  min-height:220px;background-color:var(--c-brand-700);
  background-image:url("/assets/images/backpic/back-2.webp");
  background-size:cover;background-position:center;
  box-shadow:var(--shadow-hero);
}
.cat-banner-mask{
  position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(15,31,51,.86) 0%,rgba(16,64,110,.66) 55%,rgba(16,64,110,.36) 100%);
}
.cat-banner-content{position:relative;max-width:820px;padding:36px 40px 40px;color:#fff}
.cat-banner-content h1{
  margin:16px 0 12px;font-size:42px;line-height:1.25;font-weight:700;color:#fff;
}
.cat-banner-content p{font-size:16px;line-height:1.75;color:rgba(255,255,255,.88);max-width:640px}
.cat-intro{
  max-width:880px;margin:22px auto 0;text-align:center;
  font-size:15px;line-height:1.8;color:var(--c-ink-500);
}

/* ============ 板块 ============ */
.section{padding:96px 0}
.section-tight{padding:64px 0 0}
.section-head{
  display:flex;align-items:flex-end;justify-content:space-between;gap:24px;
  margin-bottom:32px;flex-wrap:wrap;
}
.section-head h2{font-size:30px;line-height:1.35;font-weight:650;margin-top:8px}
.eyebrow{
  display:inline-block;font-size:12px;font-weight:600;letter-spacing:.06em;
  color:var(--c-brand-600);
}
.section-lead{max-width:680px;margin-top:12px;font-size:15px;color:var(--c-ink-500)}

/* ============ 数据条 ============ */
.stats{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);
  box-shadow:var(--shadow-1);overflow:hidden;
}
.stat{padding:28px 24px;border-left:1px solid var(--c-line)}
.stat:first-child{border-left:0}
.stat b{display:block;font-size:34px;line-height:1.2;font-weight:700;color:var(--c-ink-900);font-variant-numeric:tabular-nums}
.stat b small{font-size:15px;font-weight:600;color:var(--c-ink-500);margin-left:4px}
.stat span{display:block;margin-top:8px;font-size:12px;line-height:1.5;color:var(--c-ink-500)}

/* ============ 专题卡片 ============ */
.topic-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.card{
  display:flex;flex-direction:column;background:var(--c-surface);
  border:1px solid var(--c-line);border-radius:var(--r-card);overflow:hidden;
  box-shadow:var(--shadow-1);
  transition:transform .18s ease-out,box-shadow .18s ease-out,border-color .18s ease-out;
}
.card:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);border-color:var(--c-brand-300)}
.card-cover{
  position:relative;aspect-ratio:16/9;overflow:hidden;
  background:linear-gradient(135deg,var(--c-brand-50) 0%,var(--c-surface-2) 100%);
}
.card-cover img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease-out}
.card:hover .card-cover img{transform:scale(1.04)}
.card-cover .card-tag{position:absolute;left:12px;top:12px}
.card-body{padding:20px 22px 22px;display:flex;flex-direction:column;flex:1}
.card-body h3{font-size:19px;line-height:1.5;margin-bottom:8px}
.card-body p{font-size:14px;line-height:1.7;color:var(--c-ink-500)}
.card-meta{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  margin-top:18px;padding-top:14px;border-top:1px solid var(--c-line);
  font-size:13px;color:var(--c-ink-500);
}
.card-meta em{font-style:normal;color:var(--c-brand-600);font-weight:600}

/* ============ 纵向流程 ============ */
.flow{position:relative;max-width:960px;margin:0 auto;padding-top:8px}
.flow::before{
  content:"";position:absolute;left:50%;top:12px;bottom:24px;width:1px;
  background:var(--c-line);transform:translateX(-50%);
}
.flow-item{position:relative;display:flex;padding-bottom:36px}
.flow-item:last-child{padding-bottom:0}
.flow-item:nth-child(even){justify-content:flex-end}
.flow-node{
  position:absolute;left:50%;top:28px;width:12px;height:12px;border-radius:999px;
  background:var(--c-accent-500);transform:translateX(-50%);
  box-shadow:0 0 0 4px #fff,0 0 0 5px var(--c-line);
}
.flow-card{
  width:calc(50% - 44px);
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:22px 24px;box-shadow:var(--shadow-1);
  transition:transform .18s ease-out,box-shadow .18s ease-out,border-color .18s ease-out;
}
.flow-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);border-color:var(--c-brand-300)}
.flow-num{
  display:inline-block;font-size:13px;font-weight:700;letter-spacing:.08em;
  color:var(--c-brand-300);margin-bottom:6px;
}
.flow-card h3{font-size:18px;line-height:1.5;margin-bottom:8px}
.flow-card p{font-size:14px;line-height:1.75;color:var(--c-ink-500)}

/* ============ 图文两栏 ============ */
.split{display:grid;grid-template-columns:minmax(0,5fr) minmax(0,7fr);gap:48px;align-items:center}
.split-media{
  position:relative;border-radius:var(--r-hero);overflow:hidden;aspect-ratio:4/3;
  background:linear-gradient(135deg,var(--c-brand-50) 0%,var(--c-surface-2) 100%);
  box-shadow:var(--shadow-1);
}
.split-media img{width:100%;height:100%;object-fit:cover}
.point-list{display:grid;gap:14px;margin-top:24px}
.point{
  display:flex;gap:14px;background:#fff;border:1px solid var(--c-line);
  border-radius:12px;padding:16px 18px;box-shadow:var(--shadow-1);
  transition:transform .18s ease-out,box-shadow .18s ease-out,border-color .18s ease-out;
}
.point:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);border-color:var(--c-brand-300)}
.point-idx{
  flex:0 0 auto;width:28px;height:28px;border-radius:8px;
  background:var(--c-brand-50);color:var(--c-brand-700);
  display:grid;place-items:center;font-size:13px;font-weight:700;
}
.point h3{font-size:16px;line-height:1.5;margin-bottom:4px}
.point p{font-size:14px;line-height:1.7;color:var(--c-ink-500)}

/* ============ FAQ ============ */
.faq{max-width:760px;margin:0 auto}
.faq-item{border-bottom:1px solid var(--c-line)}
.faq-item:first-child{border-top:1px solid var(--c-line)}
.faq-item summary{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  min-height:56px;padding:14px 0;cursor:pointer;list-style:none;
  font-size:16px;font-weight:600;color:var(--c-ink-900);
  transition:color .18s ease-out;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--c-brand-600)}
.faq-icon{
  flex:0 0 auto;width:26px;height:26px;border-radius:999px;
  border:1px solid var(--c-line);color:var(--c-brand-600);
  display:grid;place-items:center;font-size:16px;line-height:1;
  transition:transform .18s ease-out,background .18s ease-out,color .18s ease-out,border-color .18s ease-out;
}
.faq-item[open] .faq-icon{transform:rotate(45deg);background:var(--c-brand-600);color:#fff;border-color:var(--c-brand-600)}
.faq-body{padding:0 0 20px;font-size:15px;line-height:1.75;color:var(--c-ink-700)}

/* ============ CTA ============ */
.cta-band{
  display:flex;align-items:center;justify-content:space-between;gap:32px;
  background:var(--c-surface-2);border:1px solid var(--c-line);
  border-radius:var(--r-band);padding:40px 44px;
}
.cta-band h2{font-size:26px;line-height:1.4;margin-bottom:10px}
.cta-band p{font-size:15px;line-height:1.75;color:var(--c-ink-500);max-width:620px}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap;flex:0 0 auto}

/* ============ 页脚 ============ */
.site-footer{background:#fff;border-top:1px solid var(--c-line);margin-top:96px;padding-top:64px}
.footer-grid{
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;
  padding-bottom:44px;
}
.footer-brand p{margin-top:16px;font-size:14px;line-height:1.8;color:var(--c-ink-500);max-width:360px}
.site-footer h3{font-size:14px;font-weight:600;color:var(--c-ink-900);margin-bottom:16px}
.site-footer ul{display:grid;gap:10px}
.site-footer ul a{font-size:14px;color:var(--c-ink-500);min-height:22px;display:inline-flex;align-items:center}
.site-footer ul a:hover{color:var(--c-brand-600)}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  border-top:1px solid var(--c-line);padding:20px 0 28px;
  font-size:13px;color:var(--c-ink-500);
}

/* ============ 响应式 ============ */
@media (max-width:1024px){
  .shell{padding-left:24px;padding-right:24px}
  .nav-links,.nav-search{display:none}
  .nav-toggle{display:inline-flex}
  .section{padding:72px 0}
  .cat-banner-content{padding:32px 30px 34px}
  .cat-banner-content h1{font-size:34px}
  .topic-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .split{grid-template-columns:minmax(0,1fr);gap:32px}
  .stats{grid-template-columns:repeat(2,minmax(0,1fr))}
  .stat:nth-child(3){border-left:0}
  .stat:nth-child(n+3){border-top:1px solid var(--c-line)}
  .cta-band{flex-direction:column;align-items:flex-start;padding:32px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .site-footer{margin-top:72px}
}
@media (max-width:768px){
  .flow::before{left:12px;transform:none}
  .flow-item{justify-content:flex-start;padding-left:40px}
  .flow-node{left:12px;transform:translateX(-50%)}
  .flow-card{width:100%}
  .cat-banner-content h1{font-size:28px}
  .cat-banner-content p{font-size:15px}
  .section-head h2{font-size:24px}
  .breadcrumb{padding:16px 0 14px}
}
@media (max-width:640px){
  .shell{padding-left:20px;padding-right:20px}
  .section{padding:56px 0}
  .cat-banner{border-radius:16px}
  .cat-banner-content{padding:26px 22px 28px}
  .cat-banner-content h1{font-size:24px}
  .cat-banner-content p{font-size:14px}
  .topic-grid{grid-template-columns:minmax(0,1fr)}
  .stats{grid-template-columns:minmax(0,1fr)}
  .stat{border-left:0;border-top:1px solid var(--c-line);padding:22px 20px}
  .stat:first-child{border-top:0}
  .stat b{font-size:28px}
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:28px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .cta-actions{width:100%}
  .cta-actions .btn{width:100%}
  .header-cta{padding:0 12px;font-size:13px}
  .brand-text b{font-size:16px}
}

/* roulang page: category4 */
:root{
  --c-bg:#F5F8FC;
  --c-surface:#FFFFFF;
  --c-surface-2:#EEF4FB;
  --c-line:#DDE7F2;
  --c-ink-900:#0F1F33;
  --c-ink-700:#24384F;
  --c-ink-500:#5B7290;
  --c-brand-700:#10406E;
  --c-brand-600:#16568F;
  --c-brand-500:#1E6FB8;
  --c-brand-300:#7FB3DE;
  --c-brand-50:#E8F2FB;
  --c-accent-500:#12B39A;
  --c-accent-100:#D9F5F0;
  --c-warm-500:#E8A33D;
  --radius-card:14px;
  --radius-btn:10px;
  --radius-hero:18px;
  --radius-band:20px;
  --shadow-1:0 1px 2px rgba(15,31,51,.05), 0 6px 18px -10px rgba(15,31,51,.14);
  --shadow-2:0 2px 4px rgba(15,31,51,.06), 0 16px 34px -16px rgba(15,31,51,.22);
  --shadow-hero:0 24px 60px -30px rgba(16,64,110,.45);
  --gap-section:96px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--c-ink-700);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{margin:0;color:var(--c-ink-900);letter-spacing:0;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
img{max-width:100%;display:block;}
a{color:var(--c-brand-600);text-decoration:none;transition:color .18s ease-out;}
a:hover{color:var(--c-accent-500);}
button{font-family:inherit;cursor:pointer;}
:focus-visible{outline:3px solid var(--c-brand-500);outline-offset:2px;border-radius:6px;}
.num{font-variant-numeric:tabular-nums;}

.shell{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 32px;
}
.section{margin-top:var(--gap-section);}
.section-head{margin-bottom:28px;}
.section-head .eyebrow{
  display:inline-block;
  font-size:12px;
  line-height:1.4;
  color:var(--c-brand-600);
  background:var(--c-brand-50);
  border:1px solid var(--c-brand-300);
  border-radius:999px;
  padding:4px 12px;
  margin-bottom:12px;
}
.section-head h2{
  font-size:30px;
  line-height:1.35;
  font-weight:650;
}
.section-head .lead{
  margin-top:10px;
  font-size:15px;
  color:var(--c-ink-500);
  max-width:760px;
}

/* ---------- header ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:50;
  background:rgba(255,255,255,.92);
  backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
  border-bottom:1px solid var(--c-line);
  box-shadow:var(--shadow-1);
}
.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  height:64px;
}
.brand{display:inline-flex;align-items:center;gap:10px;}
.brand-mark{
  width:34px;height:34px;flex:0 0 34px;
  border-radius:10px;
  background:var(--c-brand-600);
  color:#fff;
  display:grid;place-items:center;
  font-weight:700;font-size:16px;
}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-text b{font-size:17px;font-weight:700;color:var(--c-ink-900);}
.brand-text span{font-size:11px;color:var(--c-ink-500);}
.nav-links{display:flex;align-items:center;gap:26px;}
.nav-links a{
  position:relative;
  display:inline-flex;
  align-items:center;
  min-height:44px;
  font-size:15px;
  color:var(--c-ink-700);
  padding:8px 0;
}
.nav-links a:hover{color:var(--c-brand-600);}
.nav-links a.active{color:var(--c-brand-700);font-weight:600;}
.nav-links a.active::after{
  content:"";
  position:absolute;left:0;right:0;bottom:4px;height:2px;
  background:var(--c-brand-500);border-radius:2px;
}
.header-actions{display:flex;align-items:center;gap:14px;}
.search-box{
  display:flex;align-items:center;gap:8px;
  height:40px;padding:0 14px;
  background:var(--c-surface-2);
  border:1px solid var(--c-line);
  border-radius:var(--radius-btn);
  color:var(--c-ink-500);
  font-size:14px;
  min-width:170px;
}
.search-box input{
  border:0;background:transparent;outline:none;
  font-size:14px;color:var(--c-ink-700);width:100%;
  font-family:inherit;
}
.search-box input::placeholder{color:#8DA0B8;}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 20px;
  border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;
  border:1px solid transparent;
  transition:background-color .18s ease-out,color .18s ease-out,border-color .18s ease-out,transform .18s ease-out,box-shadow .18s ease-out;
}
.btn-primary{background:var(--c-brand-600);color:#fff;box-shadow:var(--shadow-1);}
.btn-primary:hover{background:var(--c-brand-700);color:#fff;box-shadow:var(--shadow-2);}
.btn-primary:active{transform:translateY(1px);}
.btn-ghost{background:var(--c-surface);color:var(--c-ink-700);border-color:var(--c-line);}
.btn-ghost:hover{color:var(--c-brand-600);border-color:var(--c-brand-300);}
.btn-text{
  padding:0;min-height:44px;
  color:var(--c-brand-600);
  border-bottom:2px solid var(--c-brand-300);
  border-radius:0;
  font-weight:600;
  background:transparent;
}
.btn-text:hover{color:var(--c-accent-500);border-bottom-color:var(--c-accent-500);}
.burger{
  display:none;
  width:44px;height:44px;
  border:1px solid var(--c-line);
  background:var(--c-surface);
  border-radius:var(--radius-btn);
  align-items:center;justify-content:center;
}
.burger span{display:block;width:18px;height:2px;background:var(--c-ink-700);position:relative;}
.burger span::before,.burger span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--c-ink-700);
  transition:transform .18s ease-out;
}
.burger span::before{top:-6px;}
.burger span::after{top:6px;}
.drawer-mask{
  position:fixed;inset:0;background:rgba(15,31,51,.45);
  opacity:0;pointer-events:none;transition:opacity .2s ease-out;z-index:60;
}
.drawer{
  position:fixed;top:0;right:0;height:100%;width:88%;max-width:360px;
  background:var(--c-surface);
  z-index:61;transform:translateX(102%);
  transition:transform .24s ease-out;
  padding:24px 22px;
  display:flex;flex-direction:column;gap:18px;
  box-shadow:var(--shadow-2);
}
.drawer.open{transform:translateX(0);}
.drawer-mask.open{opacity:1;pointer-events:auto;}
.drawer h2{font-size:14px;color:var(--c-ink-500);font-weight:600;}
.drawer nav{display:grid;gap:4px;}
.drawer nav a{
  display:flex;align-items:center;min-height:48px;
  padding:0 12px;border-radius:10px;
  color:var(--c-ink-700);font-size:15px;
}
.drawer nav a:hover{background:var(--c-surface-2);color:var(--c-brand-600);}
.drawer nav a.active{background:var(--c-brand-50);color:var(--c-brand-700);font-weight:600;}
.drawer .close-btn{
  align-self:flex-end;
  width:40px;height:40px;border-radius:10px;
  border:1px solid var(--c-line);background:var(--c-surface);color:var(--c-ink-700);
  font-size:18px;line-height:1;
}

/* ---------- breadcrumb ---------- */
.crumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;color:var(--c-ink-500);
  padding:24px 0 16px;
}
.crumb a{color:var(--c-ink-500);}
.crumb a:hover{color:var(--c-brand-600);}
.crumb .sep{color:#A9BAD0;}
.crumb .current{color:var(--c-ink-500);}

/* ---------- banner ---------- */
.cat-banner{
  position:relative;
  border-radius:var(--radius-band);
  overflow:hidden;
  min-height:220px;
  display:flex;flex-direction:column;justify-content:center;
  padding:34px 38px;
  color:#fff;
  background-image:linear-gradient(100deg,rgba(15,31,51,.86) 0%,rgba(16,64,110,.62) 58%,rgba(18,179,154,.34) 100%),url('/assets/images/backpic/back-2.webp');
  background-size:cover;
  background-position:center;
  box-shadow:var(--shadow-hero);
}
.cat-banner h1{
  color:#fff;
  font-size:40px;
  line-height:1.25;
  font-weight:700;
  max-width:820px;
}
.cat-banner p{
  margin-top:12px;
  font-size:15px;
  line-height:1.75;
  color:rgba(255,255,255,.86);
  max-width:720px;
}
.banner-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px;}
.banner-tags span{
  font-size:12px;line-height:1.4;
  padding:5px 12px;border-radius:999px;
  background:rgba(255,255,255,.14);
  border:1px solid rgba(255,255,255,.28);
  color:#fff;
}
.intro-line{
  margin-top:22px;
  display:flex;flex-wrap:wrap;gap:14px 28px;
  padding:18px 22px;
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-1);
  font-size:14px;color:var(--c-ink-500);
}
.intro-line b{color:var(--c-ink-900);font-weight:600;}

/* ---------- compare list ---------- */
.compare-panel{
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-1);
  overflow:hidden;
}
.compare-head{
  display:grid;
  grid-template-columns:320px 1fr;
  gap:24px;
  padding:16px 22px;
  background:var(--c-surface-2);
  border-bottom:1px solid var(--c-line);
  font-size:13px;
  color:var(--c-ink-500);
  letter-spacing:.01em;
}
.compare-row{
  display:grid;
  grid-template-columns:320px 1fr;
  gap:24px;
  align-items:center;
  min-height:56px;
  padding:16px 22px;
  border-bottom:1px solid var(--c-line);
  transition:background-color .18s ease-out;
}
.compare-row:last-child{border-bottom:0;}
.compare-row:hover{background:var(--c-surface-2);}
.compare-key{
  display:flex;align-items:center;gap:12px;
  font-size:15px;font-weight:600;color:var(--c-ink-900);
}
.compare-key i{
  flex:0 0 8px;width:8px;height:8px;
  background:var(--c-brand-500);
  border-radius:2px;
  transition:background-color .18s ease-out;
}
.compare-row:hover .compare-key i{background:var(--c-accent-500);}
.compare-val{
  font-size:14.5px;
  color:var(--c-ink-500);
  line-height:1.75;
}
.compare-val em{
  font-style:normal;
  color:var(--c-brand-700);
  background:var(--c-brand-50);
  border-radius:6px;
  padding:0 6px;
}

/* ---------- figure split ---------- */
.split{
  display:grid;
  grid-template-columns:7fr 5fr;
  gap:32px;
  align-items:center;
}
.split-media{
  border-radius:var(--radius-hero);
  overflow:hidden;
  box-shadow:var(--shadow-2);
  background:linear-gradient(140deg,var(--c-brand-50),var(--c-surface-2));
}
.split-media img{width:100%;height:100%;object-fit:cover;aspect-ratio:16/10;}
.checklist{display:grid;gap:18px;}
.checklist li{
  display:grid;
  grid-template-columns:34px 1fr;
  gap:14px;
  padding:18px 20px;
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-1);
  transition:transform .18s ease-out,box-shadow .18s ease-out,border-color .18s ease-out;
}
.checklist li:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);border-color:var(--c-brand-300);}
.checklist .idx{
  width:34px;height:34px;border-radius:10px;
  display:grid;place-items:center;
  background:var(--c-brand-50);
  color:var(--c-brand-700);
  font-weight:700;font-size:14px;
}
.checklist h3{font-size:16px;font-weight:600;line-height:1.5;}
.checklist p{margin-top:6px;font-size:14px;color:var(--c-ink-500);line-height:1.75;}

/* ---------- notice cards ---------- */
.notice-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:24px;
}
.notice{
  position:relative;
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-1);
  padding:22px 22px 22px 26px;
  transition:transform .18s ease-out,box-shadow .18s ease-out,border-color .18s ease-out;
}
.notice::before{
  content:"";position:absolute;left:0;top:18px;bottom:18px;width:3px;
  background:var(--c-accent-500);border-radius:0 3px 3px 0;
}
.notice:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);border-color:var(--c-brand-300);}
.notice h3{font-size:16px;font-weight:600;}
.notice p{margin-top:8px;font-size:14px;color:var(--c-ink-500);line-height:1.75;}

/* ---------- steps ---------- */
.steps{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:24px;
  counter-reset:step;
}
.step{
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-1);
  padding:24px 22px;
  transition:transform .18s ease-out,box-shadow .18s ease-out,border-color .18s ease-out;
}
.step:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);border-color:var(--c-brand-300);}
.step .num-lg{
  font-size:30px;font-weight:700;line-height:1;
  color:var(--c-brand-300);
  font-variant-numeric:tabular-nums;
}
.step h3{margin-top:14px;font-size:16px;font-weight:600;}
.step p{margin-top:8px;font-size:14px;color:var(--c-ink-500);line-height:1.75;}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:760px;margin:0 auto;}
.faq-item{border-bottom:1px solid var(--c-line);}
.faq-item summary{
  list-style:none;
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  min-height:56px;
  font-size:16px;font-weight:600;color:var(--c-ink-900);
  cursor:pointer;
  padding:12px 0;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-icon{
  position:relative;flex:0 0 20px;width:20px;height:20px;
  transition:transform .18s ease-out;
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:var(--c-brand-600);border-radius:2px;
}
.faq-icon::before{left:0;top:9px;width:20px;height:2px;}
.faq-icon::after{left:9px;top:0;width:2px;height:20px;transition:transform .18s ease-out,opacity .18s ease-out;}
.faq-item[open] .faq-icon::after{transform:rotate(90deg);opacity:0;}
.faq-body{padding:0 0 20px;}
.faq-body p{font-size:15px;line-height:1.75;color:var(--c-ink-500);}

/* ---------- CTA ---------- */
.cta-band{
  display:flex;align-items:center;justify-content:space-between;gap:28px;
  background:var(--c-surface-2);
  border:1px solid var(--c-line);
  border-radius:var(--radius-band);
  padding:32px 36px;
}
.cta-band h2{font-size:26px;line-height:1.35;font-weight:650;}
.cta-band p{margin-top:10px;font-size:15px;color:var(--c-ink-500);max-width:640px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;flex:0 0 auto;}
.icon-btn{
  width:40px;height:40px;border-radius:999px;
  display:grid;place-items:center;
  background:var(--c-surface);
  border:1px solid var(--c-line);
  color:var(--c-ink-700);
  font-size:14px;
  transition:background-color .18s ease-out,color .18s ease-out,border-color .18s ease-out;
}
.icon-btn:hover{background:var(--c-brand-600);border-color:var(--c-brand-600);color:#fff;}
.icon-row{display:flex;gap:10px;margin-top:14px;}

/* ---------- footer ---------- */
.site-footer{
  margin-top:var(--gap-section);
  background:var(--c-surface);
  border-top:1px solid var(--c-line);
  padding:56px 0 26px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.7fr 1fr 1fr 1fr;
  gap:32px;
}
.footer-brand p{
  margin-top:16px;
  font-size:14px;
  line-height:1.8;
  color:var(--c-ink-500);
  max-width:360px;
}
.site-footer h3{
  font-size:15px;
  font-weight:600;
  color:var(--c-ink-900);
  margin-bottom:14px;
}
.site-footer ul{display:grid;gap:10px;}
.site-footer ul a{
  font-size:14px;
  color:var(--c-ink-500);
  display:inline-flex;
  align-items:center;
  min-height:28px;
}
.site-footer ul a:hover{color:var(--c-brand-600);}
.footer-bottom{
  margin-top:40px;
  padding-top:20px;
  border-top:1px solid var(--c-line);
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;
  font-size:13px;color:var(--c-ink-500);
}

/* ---------- responsive ---------- */
@media (max-width:1023px){
  :root{--gap-section:72px;}
  .shell{padding:0 24px;}
  .nav-links,.search-box{display:none;}
  .burger{display:inline-flex;}
  .cat-banner h1{font-size:32px;}
  .split{grid-template-columns:1fr;}
  .split-media{order:-1;}
  .notice-grid{grid-template-columns:1fr 1fr;}
  .steps{grid-template-columns:1fr 1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;}
  .cta-band{flex-direction:column;align-items:flex-start;}
}
@media (max-width:767px){
  :root{--gap-section:56px;}
  .shell{padding:0 20px;}
  .header-inner{height:56px;}
  .cat-banner{min-height:200px;padding:26px 22px;border-radius:16px;}
  .cat-banner h1{font-size:26px;}
  .cat-banner p{font-size:14px;}
  .section-head h2{font-size:24px;}
  .compare-head{display:none;}
  .compare-row{grid-template-columns:1fr;gap:8px;padding:16px 18px;}
  .compare-key{font-size:15px;}
  .notice-grid{grid-template-columns:1fr;}
  .steps{grid-template-columns:1fr;}
  .cta-band{padding:24px 22px;border-radius:16px;}
  .cta-band h2{font-size:22px;}
  .footer-grid{grid-template-columns:1fr;}
  .btn{padding:0 18px;}
}
@media (max-width:520px){
  .brand-mark{width:30px;height:30px;flex:0 0 30px;font-size:15px;}
  .brand-text b{font-size:15px;}
  .brand-text span{font-size:10px;}
  .cat-banner h1{font-size:23px;}
  .header-actions .btn-primary{padding:0 14px;font-size:14px;}
}