/* roulang page: index */
:root{
  --primary:#1B6FA8;
  --primary-strong:#14567F;
  --primary-tint:#E8F2F9;
  --accent:#E8802F;
  --accent-strong:#C9661D;
  --accent-tint:#FDF0E4;
  --bg:#F5F8FB;
  --card:#FFFFFF;
  --alt:#EEF4F9;
  --text:#16232E;
  --muted:#55677A;
  --weak:#8595A5;
  --border:#DCE6F0;
  --divider:#E9F0F6;
  --success:#2E8B67;
  --warning:#C98A00;
  --danger:#C4483C;
  --r-btn:12px;
  --r-card:16px;
  --r-img:18px;
  --r-input:10px;
  --sh-1:0 1px 2px rgba(16,42,74,.06);
  --sh-2:0 10px 28px -14px rgba(16,42,74,.16);
  --sh-3:0 18px 40px -18px rgba(16,42,74,.24);
  --ease:180ms ease-out;
  --w:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
button,input{font-family:inherit;font-size:inherit}
h1,h2,h3,h4{margin:0;line-height:1.25;letter-spacing:.3px;font-weight:700}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
figure{margin:0}
a:focus-visible,button:focus-visible,summary:focus-visible,input:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:6px}
::selection{background:var(--primary-tint);color:var(--primary-strong)}
.container{width:100%;max-width:var(--w);margin:0 auto;padding:0 32px}
.section{padding:88px 0}
.section-alt{background:var(--alt)}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:36px}
.section-title{font-size:28px;position:relative;padding-left:16px}
.section-title::before{content:"";position:absolute;left:0;top:6px;bottom:6px;width:4px;border-radius:2px;background:var(--primary)}
.section-desc{margin-top:10px;color:var(--muted);font-size:15px;max-width:640px}
.section-more{font-size:15px;font-weight:600;color:var(--primary);display:inline-flex;align-items:center;gap:6px;white-space:nowrap;transition:color var(--ease),transform var(--ease)}
.section-more:hover{color:var(--primary-strong);transform:translateX(3px)}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 20px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;
  transition:transform var(--ease),box-shadow var(--ease),background-color var(--ease),color var(--ease),border-color var(--ease);
  white-space:nowrap;
}
.btn-lg{height:48px;padding:0 26px;font-size:16px}
.btn-sm{height:36px;padding:0 14px;font-size:14px}
.btn-accent{background:var(--accent);color:#fff;box-shadow:0 10px 22px -16px rgba(232,128,47,.95)}
.btn-accent:hover{background:var(--accent-strong);transform:translateY(-1px);box-shadow:0 14px 26px -16px rgba(201,102,29,.95)}
.btn-accent:active{transform:translateY(0)}
.btn-ghost{border-color:var(--primary);color:var(--primary);background:#fff}
.btn-ghost:hover{background:var(--primary-tint);border-color:var(--primary-strong);color:var(--primary-strong)}
.btn-solid{background:var(--primary);color:#fff}
.btn-solid:hover{background:var(--primary-strong);transform:translateY(-1px)}
.btn-text{height:auto;padding:0;color:var(--primary);font-weight:600;border:0;background:none}
.btn-text:hover{color:var(--primary-strong);text-decoration:underline}
.btn[disabled],.btn.is-disabled{opacity:.5;cursor:not-allowed;transform:none;box-shadow:none}

/* 顶部导航 */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(255,255,255,.97);
  border-bottom:1px solid transparent;
  transition:box-shadow var(--ease),border-color var(--ease);
}
.site-header.is-stuck{border-bottom-color:var(--border);box-shadow:0 6px 22px -16px rgba(16,42,74,.35)}
.nav{display:flex;align-items:center;gap:28px;min-height:72px}
.logo{display:flex;align-items:center;gap:10px;font-size:18px;font-weight:700;color:var(--text);flex:0 0 auto}
.logo-mark{
  width:36px;height:36px;border-radius:10px;display:grid;place-items:center;
  background:linear-gradient(140deg,#3E93C9,var(--primary) 60%,var(--primary-strong));
  color:#fff;font-size:15px;font-weight:700;letter-spacing:0;
}
.logo-text b{color:var(--primary);font-weight:700}
.nav-links{display:flex;align-items:center;gap:28px;margin-left:auto}
.nav-links a{position:relative;font-size:15px;font-weight:500;color:var(--muted);padding:8px 0;transition:color var(--ease)}
.nav-links a::after{content:"";position:absolute;left:50%;right:50%;bottom:2px;height:2px;background:var(--primary);border-radius:2px;transition:left var(--ease),right var(--ease)}
.nav-links a:hover{color:var(--primary)}
.nav-links a:hover::after{left:0;right:0}
.nav-links a.active{color:var(--primary);font-weight:600}
.nav-links a.active::after{left:0;right:0}
.nav-cta{display:flex;align-items:center;gap:12px;margin-left:8px}
.burger{
  display:none;width:44px;height:44px;border-radius:12px;border:1px solid var(--border);
  background:#fff;cursor:pointer;padding:0;place-items:center;
}
.burger span{display:block;width:18px;height:2px;background:var(--text);border-radius:2px;position:relative;transition:var(--ease)}
.burger span::before,.burger span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--text);border-radius:2px;transition:var(--ease)}
.burger span::before{top:-6px}
.burger span::after{top:6px}

/* 移动抽屉 */
.drawer-mask{
  position:fixed;inset:0;background:rgba(22,35,46,.45);opacity:0;visibility:hidden;
  transition:opacity var(--ease),visibility var(--ease);z-index:90;
}
.drawer-mask.is-open{opacity:1;visibility:visible}
.drawer{
  position:fixed;top:0;right:0;height:100%;width:84vw;max-width:360px;background:#fff;z-index:100;
  transform:translateX(102%);transition:transform 220ms ease-out;display:flex;flex-direction:column;
  box-shadow:-16px 0 40px -24px rgba(16,42,74,.4);
}
.drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding:18px 20px;border-bottom:1px solid var(--divider)}
.drawer-close{width:40px;height:40px;border-radius:10px;border:1px solid var(--border);background:#fff;cursor:pointer;font-size:18px;color:var(--muted);line-height:1}
.drawer-close:hover{background:var(--alt);color:var(--text)}
.drawer-nav{padding:8px 0;flex:1;overflow-y:auto}
.drawer-nav a{
  display:flex;align-items:center;justify-content:space-between;
  min-height:52px;padding:0 20px;font-size:16px;color:var(--text);border-bottom:1px solid var(--divider);
}
.drawer-nav a::after{content:"›";color:var(--weak);font-size:20px;line-height:1}
.drawer-nav a:hover,.drawer-nav a.active{background:var(--primary-tint);color:var(--primary-strong)}
.drawer-foot{padding:16px 20px 24px;border-top:1px solid var(--divider)}
.drawer-foot .btn{width:100%}

/* Hero */
.hero{position:relative;min-height:520px;display:flex;align-items:center;overflow:hidden;background:var(--alt)}
.hero-bg{position:absolute;inset:0;background-image:url('/assets/images/backpic/back-1.webp');background-size:cover;background-position:center right;transform:scale(1.02)}
.hero-veil{position:absolute;inset:0;background:linear-gradient(90deg,#FFFFFF 0%,rgba(255,255,255,.95) 36%,rgba(255,255,255,.62) 62%,rgba(255,255,255,.05) 100%)}
.hero-inner{position:relative;z-index:2;padding-top:64px;padding-bottom:64px}
.hero-copy{max-width:640px}
.hero-tag{
  display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:999px;
  background:var(--primary-tint);color:var(--primary-strong);font-size:13px;font-weight:600;margin-bottom:18px;
}
.hero h1{font-size:40px;line-height:1.28;margin-bottom:16px}
.hero-sub{font-size:17px;color:var(--muted);margin-bottom:28px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:26px}
.hero-badges{display:flex;flex-wrap:wrap;gap:10px}
.hero-badges li{
  padding:6px 14px;border-radius:999px;background:var(--primary-tint);color:var(--primary-strong);
  font-size:12px;font-weight:600;
}

/* 数据条 */
.stats{background:#fff;border-top:1px solid var(--divider);border-bottom:1px solid var(--divider)}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;padding:32px 0}
.stat{display:flex;flex-direction:column;gap:4px;padding-left:18px;border-left:3px solid var(--primary-tint)}
.stat b{font-family:Inter,system-ui,sans-serif;font-size:26px;font-weight:600;color:var(--primary);line-height:1.2}
.stat span{font-size:14px;color:var(--muted)}

/* 合集目录 */
.catalog{display:grid;grid-template-columns:5fr 7fr;gap:32px;align-items:stretch}
.catalog-list{background:#fff;border:1px solid var(--border);border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-1)}
.catalog-item{
  display:grid;grid-template-columns:56px 1fr;gap:16px;align-items:start;
  padding:18px 22px;border-bottom:1px solid var(--divider);
  transition:background-color var(--ease),transform var(--ease);
}
.catalog-item:last-child{border-bottom:0}
.catalog-item:hover{background:var(--primary-tint);transform:translateX(4px)}
.catalog-num{font-family:Inter,system-ui,sans-serif;font-size:24px;font-weight:600;color:var(--primary);opacity:.6;line-height:1.3}
.catalog-item h3{font-size:17px;margin-bottom:2px}
.catalog-item p{font-size:13.5px;color:var(--muted);line-height:1.6}
.catalog-media{display:grid;grid-template-rows:1fr 1fr;gap:20px}
.catalog-media figure{border-radius:var(--r-img);overflow:hidden;background:var(--alt);box-shadow:var(--sh-1);position:relative}
.catalog-media img{width:100%;height:100%;object-fit:cover;transition:transform 320ms ease-out}
.catalog-media figure:hover img{transform:scale(1.03)}
.catalog-media figcaption{
  position:absolute;left:16px;bottom:14px;padding:6px 12px;border-radius:999px;
  background:rgba(255,255,255,.92);color:var(--primary-strong);font-size:12.5px;font-weight:600;
}

/* 精选条目 */
.featured{display:grid;grid-template-columns:7fr 5fr;gap:28px;align-items:stretch}
.card{
  background:var(--card);border:1px solid var(--border);border-radius:var(--r-card);
  box-shadow:var(--sh-1);overflow:hidden;
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.card:hover{transform:translateY(-3px);box-shadow:var(--sh-3);border-color:#CBDBEA}
.feature-main{display:flex;flex-direction:column}
.feature-main .thumb{aspect-ratio:16/9;overflow:hidden;background:var(--alt)}
.feature-main .thumb img{width:100%;height:100%;object-fit:cover;transition:transform 320ms ease-out}
.feature-main:hover .thumb img{transform:scale(1.03)}
.feature-body{padding:24px 26px 26px;display:flex;flex-direction:column;gap:12px;flex:1}
.feature-main h3{font-size:20px}
.feature-main p{color:var(--muted);font-size:15px}
.feature-actions{display:flex;align-items:center;gap:18px;margin-top:auto;padding-top:8px;font-size:14px;color:var(--weak)}
.feature-side{display:grid;grid-template-rows:1fr 1fr;gap:24px}
.side-card{display:grid;grid-template-columns:120px 1fr;gap:16px;padding:16px;align-items:center}
.side-card .thumb{width:120px;height:110px;border-radius:12px;overflow:hidden;background:var(--alt)}
.side-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform 320ms ease-out}
.side-card:hover .thumb img{transform:scale(1.04)}
.side-card h3{font-size:16.5px;margin:8px 0 6px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.side-card p{font-size:13.5px;color:var(--weak)}
.badge{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:999px;
  font-size:12px;font-weight:600;line-height:1;
}
.badge-cat{background:var(--primary-tint);color:var(--primary-strong)}
.badge-key{background:var(--accent-tint);color:var(--accent-strong)}
.badge-state{background:#E7F3ED;color:var(--success)}

/* 最新信息 */
.posts-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.post-card{display:block}
.post-card .thumb{aspect-ratio:16/10;overflow:hidden;background:var(--alt)}
.post-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform 320ms ease-out}
.post-card:hover .thumb img{transform:scale(1.03)}
.post-body{padding:18px 20px 8px;display:flex;flex-direction:column;gap:10px}
.post-title{
  font-size:17px;font-weight:600;line-height:1.45;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  transition:color var(--ease);
}
.post-card:hover .post-title{color:var(--primary)}
.post-excerpt{
  font-size:14px;color:var(--muted);line-height:1.7;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.post-meta{
  display:flex;align-items:center;justify-content:space-between;
  padding:12px 20px 18px;font-size:13px;color:var(--weak);
}
.post-meta .post-more{color:var(--primary);font-weight:600}
.empty-state{
  grid-column:1 / -1;text-align:center;padding:48px 24px;background:#fff;
  border:1px dashed var(--border);border-radius:var(--r-card);
}
.empty-state .empty-icon{
  width:56px;height:56px;margin:0 auto 16px;border-radius:16px;background:var(--primary-tint);
  display:grid;place-items:center;color:var(--primary);font-size:24px;font-weight:700;
}
.empty-state p{color:var(--muted);margin-bottom:18px}

/* 相关推荐带 */
.rail{display:flex;gap:20px;overflow-x:auto;padding:4px 4px 16px;scroll-snap-type:x proximity}
.rail::-webkit-scrollbar{height:6px}
.rail::-webkit-scrollbar-thumb{background:#CBD9E6;border-radius:999px}
.rail-card{
  flex:0 0 260px;scroll-snap-align:start;background:#fff;border:1px solid var(--border);
  border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-1);
  transition:transform var(--ease),box-shadow var(--ease);
}
.rail-card:hover{transform:translateY(-3px);box-shadow:var(--sh-3)}
.rail-card .thumb{aspect-ratio:16/10;overflow:hidden;background:var(--alt)}
.rail-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform 320ms ease-out}
.rail-card:hover .thumb img{transform:scale(1.03)}
.rail-card .rail-body{padding:16px 18px 18px}
.rail-card h3{
  font-size:15.5px;font-weight:600;margin-bottom:8px;line-height:1.5;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.rail-card time{font-size:12.5px;color:var(--weak)}
.rail-more{
  flex:0 0 180px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;
  background:var(--primary-tint);border:1px solid #CFE3F2;border-radius:var(--r-card);
  color:var(--primary-strong);font-weight:600;font-size:15px;text-align:center;padding:24px 16px;
  transition:background-color var(--ease),transform var(--ease);
}
.rail-more:hover{background:#DCEBF7;transform:translateY(-3px)}
.rail-more span{font-size:24px;line-height:1}

/* FAQ */
.faq-wrap{display:grid;grid-template-columns:4fr 8fr;gap:40px;align-items:start}
.faq-intro h2{font-size:28px;margin-bottom:14px}
.faq-intro p{color:var(--muted);font-size:15px;margin-bottom:20px}
.faq-list{display:grid;gap:14px}
.faq-item{background:#fff;border:1px solid var(--border);border-radius:var(--r-card);box-shadow:var(--sh-1);overflow:hidden}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 22px;font-size:17px;font-weight:600;color:var(--text);
  transition:background-color var(--ease),color var(--ease);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{background:var(--primary-tint);color:var(--primary-strong)}
.faq-item summary::after{
  content:"+";flex:0 0 auto;font-family:Inter,system-ui,sans-serif;font-size:22px;font-weight:600;
  color:var(--primary);transition:transform var(--ease);line-height:1;
}
.faq-item[open] summary::after{content:"−";transform:rotate(180deg)}
.faq-body{padding:0 22px 20px;color:var(--muted);font-size:15px;line-height:1.85;border-top:1px solid var(--divider);padding-top:16px;margin-top:0}

/* 收藏分享 CTA 条 */
.share-bar{
  display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap;
  background:var(--alt);border-radius:var(--r-card);padding:28px 32px;
}
.share-bar h3{font-size:20px;margin-bottom:6px}
.share-bar p{color:var(--muted);font-size:15px}
.share-actions{display:flex;gap:12px;flex-wrap:wrap}

/* 底部转化条 */
.final-cta{
  background:var(--primary);border-radius:var(--r-card);padding:36px 40px;
  display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;
  box-shadow:var(--sh-2);
}
.final-cta h2{color:#fff;font-size:24px;margin-bottom:8px}
.final-cta p{color:rgba(255,255,255,.82);font-size:15px}
.toast{
  position:fixed;left:50%;bottom:36px;transform:translate(-50%,20px);opacity:0;visibility:hidden;
  background:var(--text);color:#fff;font-size:14px;padding:10px 20px;border-radius:999px;
  transition:opacity var(--ease),transform var(--ease),visibility var(--ease);z-index:200;
}
.toast.is-show{opacity:1;visibility:visible;transform:translate(-50%,0)}

/* 页脚 */
.site-footer{background:var(--alt);border-top:1px solid var(--border);margin-top:88px;padding-top:56px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:36px;padding-bottom:40px}
.footer-brand .logo{margin-bottom:16px}
.footer-brand p{color:var(--muted);font-size:14.5px;max-width:320px;margin-bottom:10px}
.footer-note{color:var(--weak);font-size:13px}
.footer-col h4{font-size:15px;margin-bottom:16px;color:var(--text)}
.footer-col ul{display:grid;gap:12px}
.footer-col a,.footer-col li{font-size:14.5px;color:var(--muted)}
.footer-col a{transition:color var(--ease)}
.footer-col a:hover{color:var(--primary)}
.footer-bottom{
  border-top:1px solid var(--border);padding:20px 0;
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:var(--weak);
}
.footer-bottom a{color:var(--weak)}
.footer-bottom a:hover{color:var(--primary)}

/* 回到顶部 */
.to-top{
  position:fixed;right:24px;bottom:28px;width:44px;height:44px;border-radius:50%;
  border:1px solid var(--border);background:#fff;color:var(--primary);cursor:pointer;
  display:grid;place-items:center;font-size:18px;box-shadow:var(--sh-2);
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity var(--ease),transform var(--ease),visibility var(--ease),background-color var(--ease);
  z-index:70;
}
.to-top.is-show{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{background:var(--primary-tint)}

/* 响应式 */
@media (max-width:1279px){
  .container{padding:0 24px}
}
@media (max-width:1023px){
  .nav-links,.nav-cta .btn-ghost{display:none}
  .burger{display:grid}
  .section{padding:64px 0}
  .hero{min-height:440px}
  .hero h1{font-size:32px}
  .catalog{grid-template-columns:1fr;gap:24px}
  .catalog-media{grid-template-rows:none;grid-template-columns:1fr 1fr}
  .catalog-media img{aspect-ratio:16/9}
  .featured{grid-template-columns:1fr}
  .feature-side{grid-template-rows:none;grid-template-columns:1fr 1fr}
  .feature-side .side-card{grid-template-columns:110px 1fr}
  .posts-grid{grid-template-columns:repeat(2,1fr)}
  .faq-wrap{grid-template-columns:1fr;gap:28px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .site-footer{margin-top:64px}
}
@media (max-width:767px){
  .container{padding:0 16px}
  .section{padding:48px 0}
  .section-head{flex-direction:column;align-items:flex-start;gap:12px;margin-bottom:24px}
  .section-title{font-size:22px}
  .hero{min-height:380px}
  .hero-inner{padding-top:48px;padding-bottom:48px}
  .hero-veil{background:linear-gradient(180deg,rgba(255,255,255,.96) 0%,rgba(255,255,255,.92) 55%,rgba(255,255,255,.7) 100%)}
  .hero h1{font-size:28px}
  .hero-sub{font-size:15.5px}
  .hero-actions .btn{width:100%}
  .stats-grid{grid-template-columns:1fr 1fr;gap:18px;padding:24px 0}
  .stat b{font-size:22px}
  .catalog-media{grid-template-columns:1fr}
  .feature-side{grid-template-columns:1fr}
  .side-card{grid-template-columns:100px 1fr}
  .side-card .thumb{width:100px;height:96px}
  .posts-grid{grid-template-columns:1fr}
  .share-bar{padding:22px 20px}
  .share-actions{width:100%}
  .share-actions .btn{flex:1 1 auto}
  .final-cta{padding:26px 22px}
  .final-cta .btn{width:100%}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding-bottom:28px}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px}
  .to-top{right:16px;bottom:16px}
}
@media (max-width:480px){
  body{font-size:15.5px}
  .hero h1{font-size:24px}
  .hero-sub{font-size:15px}
  .hero-badges li{font-size:11.5px}
  .stats-grid{grid-template-columns:1fr 1fr}
  .post-title{font-size:16px}
}

/* roulang page: article */
:root{
  --primary:#1B6FA8;
  --primary-strong:#14567F;
  --tint:#E8F2F9;
  --accent:#E8802F;
  --accent-strong:#C9661D;
  --accent-tint:#FDF0E4;
  --bg:#F5F8FB;
  --card:#FFFFFF;
  --band:#EEF4F9;
  --text:#16232E;
  --text-2:#55677A;
  --text-3:#8595A5;
  --border:#DCE6F0;
  --line:#E9F0F6;
  --ok:#2E8B67;
  --warn:#C98A00;
  --err:#C4483C;
  --r-btn:12px;
  --r-card:16px;
  --r-img:18px;
  --r-input:10px;
  --sh-1:0 1px 2px rgba(16,42,74,.06);
  --sh-2:0 10px 28px -14px rgba(16,42,74,.16);
  --sh-3:0 18px 40px -18px rgba(16,42,74,.24);
  --t:180ms ease-out;
  --maxw:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto}
a{color:var(--primary);text-decoration:none;transition:color var(--t)}
a:hover{color:var(--primary-strong)}
button{font-family:inherit;cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;line-height:1.25;letter-spacing:.3px;color:var(--text)}
h1{font-size:40px;font-weight:700}
h2{font-size:28px;font-weight:700}
h3{font-size:20px;font-weight:600}
h4{font-size:17px;font-weight:600}
p{margin:0 0 1em}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 32px}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 22px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;border:1px solid transparent;
  transition:background-color var(--t),color var(--t),border-color var(--t),transform var(--t),box-shadow var(--t);
  white-space:nowrap;
}
.btn-lg{height:48px;padding:0 28px;font-size:16px}
.btn-sm{height:36px;padding:0 16px;font-size:14px}
.btn-primary{background:var(--accent);color:#fff;box-shadow:var(--sh-1)}
.btn-primary:hover{background:var(--accent-strong);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:transparent;border-color:var(--primary);color:var(--primary)}
.btn-ghost:hover{background:var(--tint);color:var(--primary-strong)}
.btn-soft{background:var(--tint);color:var(--primary-strong)}
.btn-soft:hover{background:#DCEAF6;color:var(--primary-strong)}
.btn-text{background:none;border:none;padding:0;height:auto;color:var(--primary);font-weight:600;text-decoration:underline;text-underline-offset:4px}
.btn-text:hover{color:var(--primary-strong)}
.btn:disabled,.btn.is-disabled{opacity:.5;cursor:not-allowed;transform:none}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:80;background:#fff;
  border-bottom:1px solid transparent;transition:box-shadow var(--t),border-color var(--t);
}
.site-header.is-scrolled{border-bottom-color:var(--border);box-shadow:var(--sh-1)}
.header-inner{display:flex;align-items:center;gap:28px;height:76px}
.logo{display:inline-flex;align-items:center;gap:10px;color:var(--text);font-size:19px;font-weight:700;letter-spacing:.3px}
.logo:hover{color:var(--text)}
.logo-mark{
  width:36px;height:36px;border-radius:11px;flex:0 0 36px;
  background:linear-gradient(140deg,#1B6FA8,#3E9BD4);color:#fff;
  display:flex;align-items:center;justify-content:center;font-size:17px;font-weight:700;
  box-shadow:0 6px 16px -8px rgba(27,111,168,.75);
}
.logo-text b{color:var(--primary);font-weight:700}
.nav-links{display:flex;align-items:center;gap:28px;margin-left:8px}
.nav-links a{
  position:relative;font-size:15px;font-weight:500;color:var(--text-2);padding:6px 0;
}
.nav-links a::after{
  content:"";position:absolute;left:50%;right:50%;bottom:0;height:2px;background:var(--primary);
  transition:left var(--t),right var(--t);
}
.nav-links a:hover{color:var(--primary)}
.nav-links a:hover::after{left:0;right:0}
.nav-links a.active{color:var(--primary);font-weight:600}
.nav-links a.active::after{left:0;right:0}
.nav-actions{display:flex;align-items:center;gap:12px;margin-left:auto}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:12px;border:1px solid var(--border);
  background:#fff;color:var(--text);align-items:center;justify-content:center;font-size:17px;
}
.nav-toggle:hover{border-color:var(--primary);color:var(--primary)}

/* ---------- drawer ---------- */
.drawer-mask{
  position:fixed;inset:0;background:rgba(16,42,74,.42);opacity:0;visibility:hidden;
  transition:opacity var(--t),visibility var(--t);z-index:90;
}
.drawer-mask.is-open{opacity:1;visibility:visible}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:84vw;max-width:360px;background:#fff;z-index:95;
  transform:translateX(102%);transition:transform 220ms ease-out;
  display:flex;flex-direction:column;padding:20px 20px 24px;
}
.drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}
.drawer-close{width:40px;height:40px;border-radius:10px;border:1px solid var(--border);background:#fff;font-size:16px;color:var(--text-2)}
.drawer-close:hover{border-color:var(--primary);color:var(--primary)}
.drawer nav{display:flex;flex-direction:column}
.drawer nav a{
  display:flex;align-items:center;justify-content:space-between;
  height:52px;font-size:16px;font-weight:500;color:var(--text);border-bottom:1px solid var(--line);
}
.drawer nav a i{font-size:12px;color:var(--text-3)}
.drawer nav a.active{color:var(--primary);font-weight:600}
.drawer-foot{margin-top:auto;display:flex;flex-direction:column;gap:10px}
.drawer-foot .btn{width:100%}

/* ---------- breadcrumb ---------- */
.crumb-bar{background:#fff;border-bottom:1px solid var(--line)}
.crumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text-3);padding:14px 0;overflow:hidden}
.crumb a{color:var(--text-3)}
.crumb a:hover{color:var(--primary)}
.crumb span.sep{color:#C3D2E0}
.crumb .current{color:var(--text-2);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}

/* ---------- article head ---------- */
.article-hero{background:#fff;padding:36px 0 32px;border-bottom:1px solid var(--line)}
.article-hero .container{max-width:900px}
.badge{
  display:inline-flex;align-items:center;gap:6px;height:26px;padding:0 12px;border-radius:999px;
  font-size:12px;font-weight:600;background:var(--tint);color:var(--primary-strong);
}
.badge-accent{background:var(--accent-tint);color:var(--accent-strong)}
.badge-ok{background:#E6F4EE;color:var(--ok)}
.article-hero h1{font-size:40px;line-height:1.25;margin:16px 0 18px}
.meta-row{display:flex;flex-wrap:wrap;align-items:center;gap:14px;font-size:14px;color:var(--text-3)}
.meta-row .dot{width:4px;height:4px;border-radius:50%;background:#C3D2E0}
.meta-row i{color:var(--primary);margin-right:5px}

/* ---------- layout ---------- */
.layout{
  display:grid;grid-template-columns:minmax(0,780px) 300px;
  gap:48px;justify-content:center;align-items:start;
  padding:48px 0 88px;
}
.article-main{min-width:0}
.article-body{
  background:#fff;border:1px solid var(--border);border-radius:var(--r-card);
  padding:40px 44px;box-shadow:var(--sh-1);font-size:17px;line-height:1.9;color:#22323F;
}
.article-body p{margin:0 0 1em;text-indent:0}
.article-body h2{
  position:relative;font-size:26px;font-weight:700;margin:40px 0 16px;padding-left:16px;line-height:1.35;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:6px;bottom:6px;width:4px;border-radius:2px;background:var(--primary);
}
.article-body h3{font-size:20px;font-weight:600;margin:28px 0 12px;color:var(--text)}
.article-body h4{font-size:17px;font-weight:600;margin:22px 0 10px}
.article-body ul,.article-body ol{margin:0 0 1.1em;padding-left:1.3em}
.article-body ul{list-style:disc}
.article-body ol{list-style:decimal}
.article-body li{line-height:1.9;margin:8px 0}
.article-body blockquote{
  margin:24px 0;padding:16px 20px;background:var(--tint);border-left:3px solid var(--accent);
  border-radius:0 12px 12px 0;color:var(--text-2);
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{border-radius:var(--r-img);margin:24px auto;box-shadow:var(--sh-2)}
.article-body figure{margin:24px 0}
.article-body figcaption{text-align:center;font-size:13px;color:var(--text-3);margin-top:10px}
.article-body table{width:100%;border-collapse:collapse;margin:22px 0;font-size:15px;display:block;overflow-x:auto}
.article-body th,.article-body td{border:1px solid var(--border);padding:11px 14px;text-align:left}
.article-body th{background:var(--band);font-weight:600;color:var(--text)}
.article-body tr:nth-child(even) td{background:#F8FBFD}
.article-body a{border-bottom:1px solid rgba(27,111,168,.35)}
.article-body a:hover{border-bottom-color:var(--primary)}
.article-body code{background:var(--band);padding:2px 6px;border-radius:6px;font-size:14px}

/* ---------- empty ---------- */
.empty-state{
  background:#fff;border:1px dashed var(--border);border-radius:var(--r-card);
  padding:56px 24px;text-align:center;box-shadow:var(--sh-1);
}
.empty-state .icon{
  width:64px;height:64px;border-radius:20px;background:var(--tint);color:var(--primary);
  display:flex;align-items:center;justify-content:center;font-size:24px;margin:0 auto 18px;
}
.empty-state h3{margin-bottom:8px}
.empty-state p{color:var(--text-2);margin-bottom:22px}

/* ---------- sidebar ---------- */
.sidebar{position:sticky;top:100px;display:flex;flex-direction:column;gap:20px}
.side-card{background:#fff;border:1px solid var(--border);border-radius:var(--r-card);padding:22px;box-shadow:var(--sh-1)}
.side-card h3{font-size:16px;margin-bottom:14px;display:flex;align-items:center;gap:8px}
.side-card h3 i{color:var(--primary);font-size:14px}
.toc-list{display:flex;flex-direction:column;gap:2px;border-left:2px solid var(--line);max-height:46vh;overflow-y:auto}
.toc-list a{
  display:block;font-size:14px;line-height:1.6;color:var(--text-2);
  padding:7px 0 7px 14px;margin-left:-2px;border-left:2px solid transparent;
}
.toc-list a:hover{color:var(--primary)}
.toc-list a.is-active{color:var(--primary);font-weight:600;border-left-color:var(--primary)}
.toc-empty{font-size:13px;color:var(--text-3)}
.side-cta{background:linear-gradient(160deg,#F2F8FC,#E8F2F9);border-color:#D3E5F1}
.side-cta p{font-size:14px;color:var(--text-2);margin-bottom:16px}
.side-cta .btn{width:100%}
.side-links{display:flex;flex-direction:column;gap:10px}
.side-links a{font-size:14px;display:flex;align-items:center;gap:8px;color:var(--text-2)}
.side-links a i{color:var(--primary);font-size:12px}
.side-links a:hover{color:var(--primary)}

/* ---------- tag row ---------- */
.tag-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin:28px 0 0}
.tag-row .label{font-size:13px;color:var(--text-3)}
.tag{
  display:inline-flex;align-items:center;height:28px;padding:0 14px;border-radius:999px;
  background:var(--accent-tint);color:var(--accent-strong);font-size:12px;font-weight:600;
  transition:background-color var(--t),transform var(--t);
}
.tag:hover{background:#FBE3CE;color:var(--accent-strong);transform:translateY(-1px)}

/* ---------- share ---------- */
.share-row{display:flex;flex-wrap:wrap;align-items:center;gap:12px;margin-top:22px}
.share-row .label{font-size:13px;color:var(--text-3)}
.icon-btn{
  width:40px;height:40px;border-radius:50%;border:1px solid var(--border);background:#fff;
  color:var(--text-2);display:inline-flex;align-items:center;justify-content:center;
  transition:color var(--t),border-color var(--t),background-color var(--t),transform var(--t);
}
.icon-btn:hover{color:var(--primary);border-color:var(--primary);background:var(--tint);transform:translateY(-2px)}

/* ---------- prev next ---------- */
.pn-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:32px}
.pn-card{
  display:block;background:#fff;border:1px solid var(--border);border-radius:var(--r-card);
  padding:20px 22px;box-shadow:var(--sh-1);
  transition:transform var(--t),box-shadow var(--t),border-color var(--t);
}
.pn-card:hover{transform:translateY(-3px);box-shadow:var(--sh-3);border-color:#C9DEEE}
.pn-card .pn-label{font-size:13px;color:var(--text-3);display:flex;align-items:center;gap:6px;margin-bottom:8px}
.pn-card .pn-title{font-size:16px;font-weight:600;color:var(--text);line-height:1.5}
.pn-card:hover .pn-title{color:var(--primary)}
.pn-card.next{text-align:right}
.pn-card.next .pn-label{justify-content:flex-end}

/* ---------- related ---------- */
.related{padding:0 0 88px}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:24px}
.section-head h2{font-size:26px}
.section-head p{color:var(--text-2);font-size:15px;margin:8px 0 0}
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.card{
  display:flex;flex-direction:column;background:#fff;border:1px solid var(--border);
  border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-1);
  transition:transform var(--t),box-shadow var(--t),border-color var(--t);
}
.card:hover{transform:translateY(-3px);box-shadow:var(--sh-3);border-color:#C9DEEE}
.card-media{aspect-ratio:16/9;background:var(--band);overflow:hidden}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform 260ms ease-out}
.card:hover .card-media img{transform:scale(1.03)}
.card-body{padding:20px 22px 24px;display:flex;flex-direction:column;gap:10px;flex:1}
.card-title{
  font-size:17px;font-weight:600;line-height:1.5;color:var(--text);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.card:hover .card-title{color:var(--primary)}
.card-text{
  font-size:14px;color:var(--text-2);line-height:1.7;margin:0;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.card-foot{display:flex;align-items:center;justify-content:space-between;margin-top:auto;font-size:13px;color:var(--text-3)}

/* ---------- CTA band ---------- */
.cta-band{padding:0 0 88px}
.cta-inner{
  background:#fff;border:1px solid var(--border);border-radius:var(--r-card);
  padding:34px 36px;display:flex;align-items:center;justify-content:space-between;gap:28px;
  box-shadow:var(--sh-2);background-image:linear-gradient(120deg,#FFFFFF 55%,#F2F8FC);
}
.cta-inner h2{font-size:24px;margin-bottom:10px}
.cta-inner p{color:var(--text-2);margin:0;font-size:15px;max-width:560px}
.cta-actions{display:flex;gap:12px;flex-shrink:0}

/* ---------- footer ---------- */
.site-footer{background:var(--band);border-top:1px solid var(--border);padding:56px 0 0;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px}
.footer-brand .logo{margin-bottom:16px}
.footer-brand p{font-size:14px;color:var(--text-2);line-height:1.75;max-width:340px}
.footer-note{font-size:13px;color:var(--text-3)}
.footer-col h4{font-size:15px;margin-bottom:16px}
.footer-col ul{display:flex;flex-direction:column;gap:11px}
.footer-col li,.footer-col a{font-size:14px;color:var(--text-2);line-height:1.6}
.footer-col a:hover{color:var(--primary)}
.footer-bottom{
  margin-top:44px;border-top:1px solid var(--border);padding:20px 0 26px;
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;font-size:13px;color:var(--text-3);
}

/* ---------- back to top ---------- */
.to-top{
  position:fixed;right:24px;bottom:24px;width:44px;height:44px;border-radius:50%;
  background:var(--primary);color:#fff;border:none;display:flex;align-items:center;justify-content:center;
  box-shadow:var(--sh-2);opacity:0;visibility:hidden;transition:opacity var(--t),visibility var(--t),background-color var(--t);
  z-index:70;font-size:16px;
}
.to-top.is-show{opacity:1;visibility:visible}
.to-top:hover{background:var(--primary-strong)}

/* ---------- responsive ---------- */
@media (max-width:1180px){
  .layout{grid-template-columns:minmax(0,1fr);gap:32px;padding-bottom:64px}
  .sidebar{position:static;flex-direction:row;flex-wrap:wrap}
  .sidebar .side-card{flex:1 1 260px}
  .toc-list{max-height:none}
}
@media (max-width:1023px){
  .container{padding:0 24px}
  .nav-links{display:none}
  .nav-actions .btn-ghost{display:none}
  .nav-toggle{display:inline-flex}
  h1{font-size:32px}
  .article-hero h1{font-size:32px}
  .article-body{padding:32px 28px;font-size:16.5px}
  .article-body h2{font-size:23px}
  .card-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .cta-inner{flex-direction:column;align-items:flex-start}
}
@media (max-width:767px){
  body{font-size:15.5px}
  .container{padding:0 16px}
  .header-inner{height:66px;gap:16px}
  .logo{font-size:17px}
  .logo-mark{width:32px;height:32px;flex:0 0 32px;font-size:15px}
  .nav-actions .btn{height:40px;padding:0 16px;font-size:14px}
  h1{font-size:28px}
  h2{font-size:22px}
  .article-hero{padding:26px 0 24px}
  .article-hero h1{font-size:26px;margin:14px 0 14px}
  .layout{padding:28px 0 48px}
  .article-body{padding:24px 18px;font-size:16px;line-height:1.85}
  .article-body h2{font-size:20px;margin:32px 0 14px}
  .article-body h3{font-size:18px}
  .article-body img{border-radius:14px}
  .pn-grid{grid-template-columns:1fr}
  .pn-card.next{text-align:left}
  .pn-card.next .pn-label{justify-content:flex-start}
  .card-grid{grid-template-columns:1fr}
  .related,.cta-band{padding-bottom:48px}
  .cta-inner{padding:24px 20px}
  .cta-actions{width:100%;flex-direction:column}
  .cta-actions .btn{width:100%}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .site-footer{padding-top:40px}
  .footer-bottom{flex-direction:column;gap:8px}
  .to-top{right:16px;bottom:16px}
}
@media (max-width:480px){
  .logo-text{font-size:16px}
  .article-hero h1{font-size:23px}
  .article-body{padding:20px 15px}
  .meta-row{font-size:13px;gap:10px}
  .btn{width:100%}
  .btn-inline{width:auto}
  .section-head{flex-direction:column;align-items:flex-start}
}

/* roulang page: category1 */
:root{
  --primary:#1B6FA8;
  --primary-strong:#14567F;
  --tint:#E8F2F9;
  --accent:#E8802F;
  --accent-strong:#C9661D;
  --accent-soft:#FDF0E4;
  --bg:#F5F8FB;
  --card:#FFFFFF;
  --alt:#EEF4F9;
  --ink:#16232E;
  --muted:#55677A;
  --faint:#8595A5;
  --border:#DCE6F0;
  --divider:#E9F0F6;
  --success:#2E8B67;
  --warning:#C98A00;
  --danger:#C4483C;
  --r-btn:12px;
  --r-card:16px;
  --r-img:18px;
  --sh-1:0 1px 2px rgba(16,42,74,.06);
  --sh-2:0 10px 28px -14px rgba(16,42,74,.16);
  --sh-3:0 18px 40px -18px rgba(16,42,74,.24);
  --ease:180ms ease-out;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--ink);
  background:var(--bg);
}
img{display:block;max-width:100%;height:auto}
a{color:var(--primary);text-decoration:none;transition:color var(--ease)}
a:hover{color:var(--primary-strong)}
button{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0;line-height:1.25;letter-spacing:.3px;font-weight:700}
p{margin:0 0 1em}
p:last-child{margin-bottom:0}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px}
.visually-hidden{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 20px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;line-height:1;border:1px solid transparent;
  cursor:pointer;white-space:nowrap;transition:background-color var(--ease),color var(--ease),border-color var(--ease),transform var(--ease),box-shadow var(--ease);
}
.btn:disabled,.btn[aria-disabled="true"]{opacity:.5;cursor:not-allowed;transform:none}
.btn-accent{background:var(--accent);color:#fff;box-shadow:var(--sh-1)}
.btn-accent:hover{background:var(--accent-strong);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn-accent:active{background:var(--accent-strong);transform:translateY(0)}
.btn-ghost{background:#fff;border-color:var(--primary);color:var(--primary)}
.btn-ghost:hover{background:var(--tint);color:var(--primary-strong)}
.btn-ghost:active{background:var(--tint);color:var(--primary-strong)}
.btn-light{background:#fff;color:var(--primary);border-color:#fff}
.btn-light:hover{background:var(--tint);color:var(--primary-strong)}
.btn-lg{height:48px;padding:0 26px;font-size:16px}
.btn-sm{height:36px;padding:0 16px;font-size:14px}
.btn-block{width:100%}
.btn-text{display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:600;color:var(--primary);border:0;background:none;padding:0;cursor:pointer}
.btn-text span{transition:transform var(--ease)}
.btn-text:hover{color:var(--primary-strong)}
.btn-text:hover span{transform:translateX(4px)}

/* ---------- 头部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(255,255,255,.96);
  border-bottom:1px solid transparent;
  transition:box-shadow var(--ease),border-color var(--ease);
}
.site-header.is-scrolled{border-bottom-color:var(--border);box-shadow:0 8px 24px -18px rgba(16,42,74,.35)}
.header-inner{display:flex;align-items:center;gap:32px;min-height:74px}
.logo{display:inline-flex;align-items:center;gap:10px;font-size:19px;font-weight:700;color:var(--ink);letter-spacing:.3px;flex:0 0 auto}
.logo:hover{color:var(--ink)}
.logo-mark{
  width:34px;height:34px;border-radius:10px;flex:0 0 auto;
  background:linear-gradient(140deg,var(--primary) 0%,var(--primary-strong) 100%);
  color:#fff;font-size:15px;font-weight:700;
  display:inline-flex;align-items:center;justify-content:center;letter-spacing:0;
}
.logo-text b{color:var(--primary);font-weight:700}
.nav-links{display:flex;align-items:center;gap:28px;font-size:15px;font-weight:500}
.nav-links a{position:relative;display:inline-block;padding:8px 0;color:var(--muted)}
.nav-links a::after{
  content:"";position:absolute;left:50%;right:50%;bottom:0;height:2px;
  background:var(--primary);border-radius:2px;
  transition:left var(--ease),right var(--ease);
}
.nav-links a:hover{color:var(--primary)}
.nav-links a:hover::after,.nav-links a:focus-visible::after{left:0;right:0}
.nav-links a.active{color:var(--primary);font-weight:600}
.nav-links a.active::after{left:0;right:0}
.header-actions{margin-left:auto;display:flex;align-items:center;gap:12px}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:var(--r-btn);
  border:1px solid var(--border);background:#fff;cursor:pointer;
  align-items:center;justify-content:center;flex-direction:column;gap:5px;
  transition:background-color var(--ease),border-color var(--ease);
}
.nav-toggle:hover{background:var(--tint);border-color:var(--primary)}
.nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--ink);transition:transform var(--ease)}

/* ---------- 抽屉 ---------- */
.drawer-mask{position:fixed;inset:0;background:rgba(16,35,46,.45);opacity:0;visibility:hidden;transition:opacity var(--ease),visibility var(--ease);z-index:150}
.drawer-mask.open{opacity:1;visibility:visible}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:84vw;max-width:360px;z-index:200;
  background:#fff;box-shadow:-18px 0 40px -24px rgba(16,42,74,.4);
  transform:translateX(102%);transition:transform 220ms ease-out;
  display:flex;flex-direction:column;padding:20px;overflow-y:auto;
}
.drawer.open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding-bottom:16px;border-bottom:1px solid var(--divider)}
.drawer-close{width:40px;height:40px;border-radius:10px;border:1px solid var(--border);background:#fff;cursor:pointer;font-size:18px;line-height:1;color:var(--muted)}
.drawer-close:hover{background:var(--tint);color:var(--primary)}
.drawer-nav{margin-top:12px}
.drawer-nav a{
  display:flex;align-items:center;justify-content:space-between;
  min-height:52px;padding:0 4px;font-size:16px;font-weight:500;color:var(--ink);
  border-bottom:1px solid var(--divider);
}
.drawer-nav a::after{content:"›";color:var(--faint);font-size:20px;line-height:1}
.drawer-nav a.active{color:var(--primary);font-weight:600}
.drawer-nav a:hover{color:var(--primary)}
.drawer-foot{margin-top:auto;padding-top:20px;border-top:1px solid var(--divider);display:flex;flex-direction:column;gap:12px}
body.no-scroll{overflow:hidden}

/* ---------- 分类封面条 ---------- */
.cat-hero{
  position:relative;
  min-height:260px;
  display:flex;align-items:center;
  background-color:var(--alt);
  background-image:linear-gradient(90deg,rgba(245,248,251,.97) 0%,rgba(245,248,251,.88) 46%,rgba(245,248,251,.4) 100%),url("/assets/images/backpic/back-1.webp");
  background-size:cover;background-position:center right;
  border-bottom:1px solid var(--border);
}
.cat-hero-inner{padding:56px 0;max-width:660px}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--faint);margin-bottom:16px}
.breadcrumb a{color:var(--faint)}
.breadcrumb a:hover{color:var(--primary)}
.breadcrumb .sep{color:#C3D0DC}
.cat-hero h1{font-size:40px;font-weight:700;margin-bottom:14px}
.cat-hero .hero-desc{font-size:17px;color:var(--muted);max-width:520px;margin:0}
.cat-badges{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}

/* ---------- 徽章 / 标签 ---------- */
.badge{display:inline-flex;align-items:center;gap:6px;height:28px;padding:0 12px;border-radius:999px;font-size:12px;font-weight:600;line-height:1}
.badge-topic{background:var(--tint);color:var(--primary)}
.badge-key{background:var(--accent-soft);color:var(--accent-strong)}
.badge-soft{background:#fff;color:var(--muted);border:1px solid var(--border)}
.badge-ok{background:rgba(46,139,103,.12);color:var(--success)}

/* ---------- 主布局 ---------- */
.section{padding:72px 0}
.section-alt{background:var(--alt)}
.section-head{margin-bottom:32px;max-width:720px}
.section-head h2{font-size:28px;margin-bottom:12px}
.section-head p{color:var(--muted);margin:0}
.cat-layout{display:grid;grid-template-columns:7fr 5fr;gap:32px;align-items:start;padding-top:64px}

/* 图文小节 */
.article-block{
  background:var(--card);border:1px solid var(--border);border-radius:var(--r-card);
  padding:28px;box-shadow:var(--sh-1);margin-bottom:24px;
  transition:box-shadow var(--ease),transform var(--ease);
}
.article-block:hover{box-shadow:var(--sh-2)}
.article-block h2{
  font-size:22px;margin-bottom:16px;padding-left:14px;position:relative;
}
.article-block h2::before{
  content:"";position:absolute;left:0;top:4px;bottom:4px;width:4px;border-radius:2px;background:var(--primary);
}
.article-block p{color:var(--muted);font-size:16px;line-height:1.85}
.block-figure{
  margin:20px 0 0;border-radius:var(--r-img);overflow:hidden;background:var(--alt);
  aspect-ratio:16/9;
}
.block-figure img{width:100%;height:100%;object-fit:cover;transition:transform var(--ease)}
.article-block:hover .block-figure img{transform:scale(1.03)}
.block-meta{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:14px}

/* 时间线 */
.timeline{
  position:sticky;top:98px;
  background:var(--card);border:1px solid var(--border);border-radius:var(--r-card);
  padding:26px;box-shadow:var(--sh-1);
}
.timeline h2{font-size:20px;margin-bottom:8px}
.timeline .tl-intro{font-size:14px;color:var(--faint);margin-bottom:22px}
.tl-item{position:relative;padding-left:30px;padding-bottom:22px}
.tl-item:last-child{padding-bottom:0}
.tl-item::before{content:"";position:absolute;left:5px;top:16px;bottom:-6px;width:1px;background:var(--divider)}
.tl-item:last-child::before{display:none}
.tl-dot{position:absolute;left:0;top:5px;width:11px;height:11px;border-radius:50%;background:#fff;border:2px solid var(--primary)}
.tl-item.is-done .tl-dot{background:var(--primary)}
.tl-step{display:block;font-size:12px;font-weight:600;color:var(--accent-strong);letter-spacing:.5px;margin-bottom:2px}
.tl-item h3{font-size:17px;font-weight:600;margin-bottom:4px}
.tl-item p{font-size:14px;color:var(--muted);margin:0}

/* 双列对比 / 信息卡 */
.info-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;margin-top:8px}
.info-card{
  background:var(--card);border:1px solid var(--border);border-radius:var(--r-card);
  padding:24px;box-shadow:var(--sh-1);transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.info-card:hover{transform:translateY(-3px);box-shadow:var(--sh-3);border-color:#C9D9E6}
.info-card h3{font-size:18px;margin-bottom:10px}
.info-card p{font-size:15px;color:var(--muted);margin:0}
.info-card ul{margin-top:12px;display:flex;flex-direction:column;gap:8px}
.info-card li{position:relative;padding-left:18px;font-size:15px;color:var(--muted)}
.info-card li::before{content:"";position:absolute;left:0;top:10px;width:6px;height:6px;border-radius:50%;background:var(--primary)}

/* FAQ */
.faq-list{display:flex;flex-direction:column;gap:14px;max-width:900px;margin:0 auto}
.faq-item{background:var(--card);border:1px solid var(--border);border-radius:var(--r-card);box-shadow:var(--sh-1);overflow:hidden;transition:box-shadow var(--ease)}
.faq-item:hover{box-shadow:var(--sh-2)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 24px;background:none;border:0;cursor:pointer;text-align:left;
  font-size:17px;font-weight:600;color:var(--ink);
}
.faq-q:hover{color:var(--primary)}
.faq-icon{position:relative;width:18px;height:18px;flex:0 0 auto}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;background:var(--primary);border-radius:2px;transition:transform var(--ease),opacity var(--ease)}
.faq-icon::before{left:0;top:8px;width:18px;height:2px}
.faq-icon::after{left:8px;top:0;width:2px;height:18px}
.faq-item.open .faq-icon::after{transform:rotate(90deg);opacity:0}
.faq-a{max-height:0;overflow:hidden;transition:max-height 260ms ease-out}
.faq-a-inner{padding:0 24px 22px;font-size:15.5px;color:var(--muted);line-height:1.85}

/* 相关推荐 */
.rec-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.rec-card{
  display:flex;flex-direction:column;background:var(--card);border:1px solid var(--border);
  border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-1);color:var(--ink);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.rec-card:hover{transform:translateY(-3px);box-shadow:var(--sh-3);border-color:#C9D9E6;color:var(--ink)}
.rec-thumb{aspect-ratio:16/10;background:var(--alt);overflow:hidden}
.rec-thumb img{width:100%;height:100%;object-fit:cover;transition:transform var(--ease)}
.rec-card:hover .rec-thumb img{transform:scale(1.03)}
.rec-body{padding:18px;display:flex;flex-direction:column;gap:8px;flex:1}
.rec-body h3{font-size:16px;font-weight:600;line-height:1.45;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.rec-body p{font-size:13.5px;color:var(--faint);margin:0}
.rec-card:hover h3{color:var(--primary)}

/* CTA 条 */
.cta-band{
  background:var(--primary);color:#fff;border-radius:var(--r-card);
  padding:36px 40px;display:flex;align-items:center;gap:28px;justify-content:space-between;
  box-shadow:var(--sh-2);
}
.cta-band h2{font-size:24px;color:#fff;margin-bottom:8px}
.cta-band p{color:rgba(255,255,255,.86);margin:0;font-size:15.5px;max-width:620px}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap;flex:0 0 auto}

/* 返回顶部 */
.to-top{
  position:fixed;right:24px;bottom:24px;width:44px;height:44px;border-radius:50%;
  border:1px solid var(--border);background:#fff;color:var(--primary);cursor:pointer;
  display:flex;align-items:center;justify-content:center;font-size:18px;
  box-shadow:var(--sh-2);opacity:0;visibility:hidden;transform:translateY(8px);
  transition:opacity var(--ease),visibility var(--ease),transform var(--ease),background-color var(--ease);
  z-index:90;
}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{background:var(--tint)}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--alt);border-top:1px solid var(--border);margin-top:88px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:32px;padding:56px 0 40px}
.footer-brand p{font-size:14.5px;color:var(--muted);margin:16px 0 0;max-width:330px}
.footer-brand .footer-note{font-size:13px;color:var(--faint);margin-top:10px}
.footer-col h4{font-size:15px;font-weight:600;margin-bottom:16px}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col li{font-size:14.5px;color:var(--muted)}
.footer-col a{color:var(--muted)}
.footer-col a:hover{color:var(--primary)}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  padding:20px 0 28px;border-top:1px solid var(--border);font-size:13px;color:var(--faint);
}

/* ---------- 响应式 ---------- */
@media (max-width:1023px){
  .container{padding:0 24px}
  .header-inner{gap:20px}
  .nav-links{gap:20px}
  .nav-links a{font-size:14.5px}
  .cat-hero h1{font-size:32px}
  .cat-layout{grid-template-columns:1fr;padding-top:48px}
  .timeline{position:static;top:auto}
  .section{padding:56px 0}
  .rec-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;padding:44px 0 32px}
}
@media (max-width:767px){
  .container{padding:0 16px}
  .nav-links{display:none}
  .header-actions .btn-ghost{display:none}
  .nav-toggle{display:inline-flex}
  .header-inner{min-height:66px;gap:12px}
  .cat-hero{min-height:220px}
  .cat-hero-inner{padding:40px 0}
  .cat-hero h1{font-size:26px}
  .cat-hero .hero-desc{font-size:15.5px}
  .section{padding:48px 0}
  .section-head h2{font-size:22px}
  .article-block{padding:20px}
  .article-block h2{font-size:19px}
  .info-grid{grid-template-columns:1fr}
  .cta-band{flex-direction:column;align-items:flex-start;padding:28px 22px;gap:20px}
  .cta-band h2{font-size:20px}
  .cta-actions{width:100%}
  .cta-actions .btn{flex:1 1 auto}
  .faq-q{padding:18px;font-size:16px}
  .faq-a-inner{padding:0 18px 20px;font-size:15px}
}
@media (max-width:560px){
  .rec-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .cat-hero h1{font-size:23px}
  .article-block p{font-size:15.5px}
  .btn-lg{height:46px;padding:0 20px;font-size:15px}
  .to-top{right:16px;bottom:16px}
}

/* roulang page: category2 */
:root{
  --primary:#1B6FA8;
  --primary-strong:#14567F;
  --tint:#E8F2F9;
  --accent:#E8802F;
  --accent-strong:#C9661D;
  --accent-soft:#FDF0E4;
  --bg:#F5F8FB;
  --card:#FFFFFF;
  --alt:#EEF4F9;
  --text:#16232E;
  --text-2:#55677A;
  --text-3:#8595A5;
  --border:#DCE6F0;
  --divider:#E9F0F6;
  --ok:#2E8B67;
  --warn:#C98A00;
  --err:#C4483C;
  --radius-btn:12px;
  --radius-card:16px;
  --radius-img:18px;
  --radius-input:10px;
  --shadow-1:0 1px 2px rgba(16,42,74,.06);
  --shadow-2:0 10px 28px -14px rgba(16,42,74,.16);
  --shadow-3:0 18px 40px -18px rgba(16,42,74,.24);
  --sp-1:8px; --sp-2:16px; --sp-3:24px; --sp-4:32px; --sp-5:48px; --sp-6:64px; --sp-7:88px;
  --font-cn:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  --font-num:"Inter",system-ui,-apple-system,"PingFang SC",sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block;height:auto;}
a{color:var(--primary);text-decoration:none;transition:color 180ms ease-out,background-color 180ms ease-out;}
a:hover{color:var(--primary-strong);}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;line-height:1.25;letter-spacing:.3px;font-weight:600;color:var(--text);}
p{margin:0;}
button{font-family:inherit;font-size:inherit;cursor:pointer;border:0;background:none;color:inherit;}
input,textarea{font-family:inherit;font-size:inherit;}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:4px;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px;}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 22px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;letter-spacing:.3px;
  border:1px solid transparent;cursor:pointer;
  transition:transform 180ms ease-out,box-shadow 180ms ease-out,background-color 180ms ease-out,color 180ms ease-out,border-color 180ms ease-out;
}
.btn-lg{height:48px;padding:0 26px;font-size:16px;}
.btn-sm{height:36px;padding:0 16px;font-size:14px;}
.btn-accent{background:var(--accent);color:#fff;box-shadow:var(--shadow-1);}
.btn-accent:hover{background:var(--accent-strong);transform:translateY(-1px);box-shadow:var(--shadow-2);color:#fff;}
.btn-accent:active{transform:translateY(0);}
.btn-ghost{background:#fff;border-color:var(--primary);color:var(--primary);}
.btn-ghost:hover{background:var(--tint);color:var(--primary-strong);border-color:var(--primary-strong);}
.btn-ghost-light{background:transparent;border-color:rgba(255,255,255,.75);color:#fff;}
.btn-ghost-light:hover{background:rgba(255,255,255,.14);color:#fff;}
.btn-text{height:auto;padding:0;color:var(--primary);font-weight:600;border:0;}
.btn-text::after{content:"→";margin-left:6px;transition:transform 180ms ease-out;display:inline-block;}
.btn-text:hover{color:var(--primary-strong);text-decoration:underline;}
.btn-text:hover::after{transform:translateX(3px);}
.btn:disabled,.btn[disabled]{opacity:.5;cursor:not-allowed;transform:none;box-shadow:none;}

/* ---------- 标签 / 徽章 ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  height:24px;padding:0 10px;border-radius:999px;
  font-size:12px;font-weight:600;letter-spacing:.2px;line-height:1;
}
.badge-cat{background:var(--tint);color:var(--primary);}
.badge-key{background:var(--accent-soft);color:var(--accent-strong);}
.badge-ok{background:#E4F3EC;color:var(--ok);}
.badge-warn{background:#FAF0DA;color:var(--warn);}
.badge-info{background:var(--tint);color:var(--primary-strong);}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(255,255,255,.96);
  backdrop-filter:saturate(180%) blur(10px);
  border-bottom:1px solid transparent;
  transition:box-shadow 180ms ease-out,border-color 180ms ease-out;
}
.site-header.is-stuck{border-bottom-color:var(--border);box-shadow:0 4px 20px -14px rgba(16,42,74,.28);}
.nav-inner{
  display:flex;align-items:center;gap:var(--sp-3);
  height:76px;
}
.logo{display:inline-flex;align-items:center;gap:10px;flex-shrink:0;}
.logo-mark{
  width:38px;height:38px;flex:0 0 38px;border-radius:11px;
  background:linear-gradient(150deg,var(--primary) 0%,#3E93C6 100%);
  color:#fff;font-size:19px;font-weight:700;display:flex;align-items:center;justify-content:center;
  letter-spacing:0;box-shadow:var(--shadow-1);
}
.logo-text{font-size:19px;font-weight:600;color:var(--text);letter-spacing:.4px;white-space:nowrap;}
.logo-text b{font-weight:700;color:var(--primary);}
.nav-links{display:flex;align-items:center;gap:28px;margin-left:auto;}
.nav-links a{
  position:relative;font-size:15px;font-weight:500;color:var(--text-2);
  padding:26px 0;letter-spacing:.2px;
}
.nav-links a::after{
  content:"";position:absolute;left:50%;right:50%;bottom:18px;height:2px;
  background:var(--primary);border-radius:2px;
  transition:left 180ms ease-out,right 180ms ease-out;
}
.nav-links a:hover{color:var(--primary);}
.nav-links a:hover::after{left:0;right:0;}
.nav-links a.active{color:var(--primary);font-weight:600;}
.nav-links a.active::after{left:0;right:0;}
.nav-actions{display:flex;align-items:center;gap:10px;margin-left:var(--sp-2);}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:var(--radius-btn);
  border:1px solid var(--border);background:#fff;align-items:center;justify-content:center;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--text);border-radius:2px;position:relative;}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--text);border-radius:2px;
  transition:transform 180ms ease-out,top 180ms ease-out;
}
.nav-toggle span::before{top:-6px;}
.nav-toggle span::after{top:6px;}
.nav-toggle[aria-expanded="true"] span{background:transparent;}
.nav-toggle[aria-expanded="true"] span::before{top:0;transform:rotate(45deg);}
.nav-toggle[aria-expanded="true"] span::after{top:0;transform:rotate(-45deg);}

.drawer{
  position:fixed;top:0;right:0;bottom:0;width:84vw;max-width:360px;z-index:80;
  background:#fff;box-shadow:-16px 0 40px -20px rgba(16,42,74,.34);
  transform:translateX(102%);transition:transform 220ms ease-out;
  display:flex;flex-direction:column;padding:20px 20px 24px;
}
.drawer.is-open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px;}
.drawer-close{
  width:40px;height:40px;border-radius:10px;border:1px solid var(--border);
  font-size:20px;line-height:1;color:var(--text-2);display:flex;align-items:center;justify-content:center;
}
.drawer-nav{display:flex;flex-direction:column;margin-top:6px;}
.drawer-nav a{
  display:flex;align-items:center;justify-content:space-between;
  height:52px;font-size:16px;font-weight:500;color:var(--text);
  border-bottom:1px solid var(--divider);
}
.drawer-nav a::after{content:"›";color:var(--text-3);font-size:20px;}
.drawer-nav a.active{color:var(--primary);font-weight:600;}
.drawer-foot{margin-top:auto;display:grid;gap:10px;}
.drawer-foot .btn{width:100%;}
.scrim{
  position:fixed;inset:0;background:rgba(16,35,46,.42);z-index:70;opacity:0;visibility:hidden;
  transition:opacity 200ms ease-out,visibility 200ms ease-out;
}
.scrim.is-open{opacity:1;visibility:visible;}
body.drawer-lock{overflow:hidden;}

/* ---------- 面包屑 ---------- */
.breadcrumb{font-size:13px;color:var(--text-3);display:flex;flex-wrap:wrap;gap:6px;align-items:center;}
.breadcrumb a{color:var(--text-3);}
.breadcrumb a:hover{color:var(--primary);}
.breadcrumb .sep{color:#C3D1DE;}
.breadcrumb .now{color:var(--text-2);}

/* ---------- 分类 Hero（窄幅 + 编号索引） ---------- */
.cat-hero{
  position:relative;
  background:linear-gradient(180deg,var(--tint) 0%,#F2F8FC 100%);
  border-bottom:1px solid var(--border);
}
.cat-hero .inner{
  min-height:180px;
  display:grid;grid-template-columns:minmax(0,1fr) minmax(0,420px);
  gap:var(--sp-4);align-items:center;
  padding:36px 0 32px;
}
.cat-hero h1{font-size:40px;font-weight:700;letter-spacing:.3px;margin:12px 0 10px;}
.cat-hero .lead{font-size:16px;color:var(--text-2);max-width:56ch;line-height:1.75;}
.anchor-index{display:flex;flex-wrap:wrap;gap:10px;justify-content:flex-end;align-content:center;}
.anchor-index a{
  display:inline-flex;align-items:center;gap:8px;
  height:38px;padding:0 16px;border-radius:999px;
  background:#fff;border:1px solid var(--border);
  font-size:14px;font-weight:600;color:var(--text-2);
  transition:transform 180ms ease-out,box-shadow 180ms ease-out,color 180ms ease-out,border-color 180ms ease-out,background-color 180ms ease-out;
}
.anchor-index a .num{font-family:var(--font-num);font-weight:600;color:var(--primary);font-size:13px;}
.anchor-index a:hover{
  color:var(--primary);border-color:#BFDCF0;background:#fff;
  transform:translateY(-2px);box-shadow:var(--shadow-2);
}

/* ---------- 通用板块 ---------- */
.section{padding:var(--sp-7) 0;}
.section-alt{background:var(--alt);}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:var(--sp-3);margin-bottom:var(--sp-5);}
.section-head h2{font-size:28px;font-weight:700;position:relative;padding-left:16px;}
.section-head h2::before{
  content:"";position:absolute;left:0;top:6px;bottom:6px;width:4px;border-radius:3px;background:var(--primary);
}
.section-head .sub{font-size:15px;color:var(--text-2);margin-top:8px;max-width:62ch;padding-left:16px;}

/* ---------- 大图清单 ---------- */
.entry-list{border-top:1px solid var(--divider);}
.entry{
  border-bottom:1px solid var(--divider);
  padding:var(--sp-5) 0;
}
.entry-inner{display:grid;grid-template-columns:40% minmax(0,1fr);gap:var(--sp-5);align-items:start;}
.entry-media{
  border-radius:var(--radius-img);overflow:hidden;position:relative;
  aspect-ratio:16/10;background:var(--alt);box-shadow:var(--shadow-1);
}
.entry-media img{width:100%;height:100%;object-fit:cover;transition:transform 400ms ease-out;}
.entry:hover .entry-media img{transform:scale(1.03);}
.entry-index{
  font-family:var(--font-num);font-size:60px;font-weight:600;line-height:1;
  color:transparent;-webkit-text-stroke:1.5px #B9D3E6;
  display:block;margin-bottom:12px;
}
.entry:hover .entry-index{-webkit-text-stroke-color:var(--primary);}
.entry h3{font-size:22px;font-weight:600;margin-bottom:12px;transition:color 180ms ease-out;}
.entry:hover h3{color:var(--primary);}
.entry p{color:var(--text-2);margin-bottom:12px;line-height:1.85;}
.entry p:last-of-type{margin-bottom:0;}
.entry-points{display:grid;gap:8px;margin-top:var(--sp-2);}
.entry-points li{
  position:relative;padding-left:24px;font-size:15px;color:var(--text-2);line-height:1.7;
}
.entry-points li::before{
  content:"";position:absolute;left:6px;top:10px;width:7px;height:7px;border-radius:2px;
  background:var(--accent);opacity:.85;
}
.entry-meta{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:14px;}

/* ---------- 双列对比卡 ---------- */
.compare{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:var(--sp-3);}
.compare-card{
  background:var(--card);border:1px solid var(--border);border-radius:var(--radius-card);
  padding:28px;box-shadow:var(--shadow-1);
  transition:transform 180ms ease-out,box-shadow 180ms ease-out;
}
.compare-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-2);}
.compare-card.is-primary{background:#fff;border-top:4px solid var(--primary);}
.compare-card.is-accent{background:var(--accent-soft);border-color:#F3DCC6;border-top:4px solid var(--accent);}
.compare-card h3{font-size:20px;margin-bottom:8px;}
.compare-card .tagline{font-size:14px;color:var(--text-3);margin-bottom:18px;}
.compare-card ul{display:grid;gap:12px;}
.compare-card li{
  display:grid;grid-template-columns:20px minmax(0,1fr);gap:10px;
  font-size:15px;color:var(--text-2);line-height:1.7;
}
.compare-card li .dot{
  width:18px;height:18px;border-radius:50%;margin-top:4px;
  display:flex;align-items:center;justify-content:center;font-size:11px;font-weight:700;color:#fff;
}
.is-primary .dot{background:var(--primary);}
.is-accent .dot{background:var(--accent);}

/* ---------- FAQ ---------- */
.faq-list{display:grid;gap:14px;}
.faq-item{
  background:var(--card);border:1px solid var(--border);border-radius:var(--radius-card);
  box-shadow:var(--shadow-1);overflow:hidden;
}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 24px;text-align:left;font-size:17px;font-weight:600;color:var(--text);
  transition:color 180ms ease-out,background-color 180ms ease-out;
}
.faq-q:hover{color:var(--primary);background:#F8FBFE;}
.faq-q .icon{
  flex:0 0 26px;width:26px;height:26px;border-radius:8px;background:var(--tint);color:var(--primary);
  display:flex;align-items:center;justify-content:center;font-size:16px;font-weight:700;line-height:1;
  transition:transform 200ms ease-out,background-color 180ms ease-out,color 180ms ease-out;
}
.faq-item.is-open .faq-q .icon{transform:rotate(180deg);background:var(--accent-soft);color:var(--accent-strong);}
.faq-a{
  max-height:0;overflow:hidden;
  transition:max-height 260ms ease-out;
}
.faq-a .inner{padding:0 24px 22px;color:var(--text-2);line-height:1.85;font-size:15.5px;}
.faq-a .inner strong{color:var(--text);}

/* ---------- CTA 条 ---------- */
.cta-band{
  background:var(--primary);color:#fff;border-radius:var(--radius-card);
  padding:38px 40px;display:flex;align-items:center;justify-content:space-between;gap:var(--sp-4);
  box-shadow:var(--shadow-2);
}
.cta-band h2{color:#fff;font-size:26px;font-weight:700;margin-bottom:8px;}
.cta-band p{color:rgba(255,255,255,.86);font-size:15px;line-height:1.75;max-width:60ch;}
.cta-band .actions{display:flex;gap:12px;flex-wrap:wrap;flex-shrink:0;}

/* ---------- 服务窗口信息条 ---------- */
.info-strip{
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:var(--sp-3);
}
.info-cell{
  background:var(--card);border:1px solid var(--border);border-radius:var(--radius-card);
  padding:24px;box-shadow:var(--shadow-1);
  transition:transform 180ms ease-out,box-shadow 180ms ease-out;
}
.info-cell:hover{transform:translateY(-3px);box-shadow:var(--shadow-2);}
.info-cell .k{font-size:13px;color:var(--text-3);letter-spacing:.4px;margin-bottom:8px;}
.info-cell .v{font-family:var(--font-num);font-size:26px;font-weight:600;color:var(--primary);line-height:1.2;}
.info-cell .d{font-size:14px;color:var(--text-2);margin-top:8px;}

/* ---------- 返回顶部 ---------- */
.to-top{
  position:fixed;right:24px;bottom:28px;z-index:55;
  width:44px;height:44px;border-radius:50%;
  background:#fff;border:1px solid var(--border);color:var(--primary);
  box-shadow:var(--shadow-2);display:flex;align-items:center;justify-content:center;font-size:18px;
  opacity:0;visibility:hidden;transform:translateY(8px);
  transition:opacity 200ms ease-out,visibility 200ms ease-out,transform 200ms ease-out,background-color 180ms ease-out,color 180ms ease-out;
}
.to-top.is-show{opacity:1;visibility:visible;transform:translateY(0);}
.to-top:hover{background:var(--tint);color:var(--primary-strong);}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--alt);border-top:1px solid var(--border);
  padding:var(--sp-6) 0 0;margin-top:0;
}
.footer-grid{
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:var(--sp-4);
  padding-bottom:var(--sp-5);
}
.footer-brand .logo{margin-bottom:16px;}
.footer-brand p{font-size:14.5px;color:var(--text-2);line-height:1.8;max-width:36ch;}
.footer-brand .footer-note{margin-top:12px;font-size:13px;color:var(--text-3);}
.footer-col h4{font-size:15px;font-weight:600;margin-bottom:16px;color:var(--text);}
.footer-col ul{display:grid;gap:10px;}
.footer-col li,.footer-col a{font-size:14.5px;color:var(--text-2);}
.footer-col a:hover{color:var(--primary);}
.footer-bottom{
  border-top:1px solid var(--border);
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  padding:18px 0 22px;font-size:13px;color:var(--text-3);
}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .container{padding:0 24px;}
  .cat-hero h1{font-size:34px;}
}
@media (max-width:1023px){
  .nav-links{display:none;}
  .nav-actions .btn-ghost{display:none;}
  .nav-toggle{display:flex;margin-left:auto;}
  .nav-actions{margin-left:12px;}
  .cat-hero .inner{grid-template-columns:1fr;gap:22px;padding:32px 0 28px;}
  .anchor-index{justify-content:flex-start;}
  .entry-inner{grid-template-columns:44% minmax(0,1fr);gap:var(--sp-4);}
  .footer-grid{grid-template-columns:1fr 1fr;gap:var(--sp-4);}
  .compare{grid-template-columns:1fr;}
  .section{padding:64px 0;}
}
@media (max-width:767px){
  .container{padding:0 16px;}
  .nav-actions .btn-accent{display:none;}
  .cat-hero h1{font-size:28px;}
  .cat-hero .lead{font-size:15px;}
  .section{padding:48px 0;}
  .section-head{flex-direction:column;align-items:flex-start;gap:10px;margin-bottom:32px;}
  .section-head h2{font-size:22px;}
  .entry{padding:32px 0;}
  .entry-inner{grid-template-columns:1fr;gap:20px;}
  .entry-index{font-size:44px;}
  .entry h3{font-size:19px;}
  .entry p{font-size:15.5px;}
  .cta-band{flex-direction:column;align-items:flex-start;padding:28px 22px;}
  .cta-band h2{font-size:21px;}
  .cta-band .actions{width:100%;}
  .cta-band .actions .btn{width:100%;}
  .info-strip{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;gap:6px;}
  .to-top{right:16px;bottom:18px;}
}
@media (max-width:480px){
  .cat-hero h1{font-size:25px;}
  .anchor-index a{height:34px;padding:0 13px;font-size:13px;}
  .compare-card,.faq-q{padding-left:18px;padding-right:18px;}
  .faq-a .inner{padding:0 18px 20px;}
  .logo-text{font-size:17px;}
  .logo-mark{width:34px;height:34px;flex-basis:34px;font-size:17px;}
}