/* roulang page: index */
:root{
  --c-brand-700:#123F66;
  --c-brand-600:#1C5C93;
  --c-brand-500:#2E7CB8;
  --c-brand-300:#A8C9E2;
  --c-brand-50:#EFF6FB;
  --c-accent:#17A2A6;
  --c-accent-50:#E7F6F6;
  --c-warm:#E07A3F;
  --c-bg:#F6F8FB;
  --c-surface:#FFFFFF;
  --c-surface-2:#EEF3F9;
  --c-line:#E2E8F0;
  --c-ink:#15202B;
  --c-ink-2:#43535F;
  --c-ink-3:#7A8996;
  --c-ok:#2E9E6B;
  --c-warn:#D9A02B;
  --c-err:#D2504B;
  --r-card:14px;
  --r-lg:20px;
  --r-btn:10px;
  --r-img:12px;
  --sh-sm:0 1px 2px rgba(21,42,66,.06);
  --sh-md:0 6px 18px rgba(21,42,66,.07),0 1px 2px rgba(21,42,66,.05);
  --sh-lg:0 14px 32px rgba(21,42,66,.12);
  --sp-section:88px;
  --container:1200px;
  --font:-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.8;
  color:var(--c-ink-2);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0;}
ul,ol{padding:0;list-style:none;}
img{max-width:100%;display:block;height:auto;}
a{color:var(--c-brand-600);text-decoration:none;transition:color .2s ease;}
a:hover{color:var(--c-brand-700);}
button{font-family:inherit;font-size:inherit;border:0;background:none;cursor:pointer;}
input{font-family:inherit;}
:focus-visible{outline:2px solid var(--c-brand-600);outline-offset:2px;border-radius:4px;}

.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px;}
.section{padding:var(--sp-section) 0;}
.section-alt{background:var(--c-surface);}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:36px;}
.section-title{position:relative;font-size:28px;font-weight:700;line-height:1.35;color:var(--c-ink);padding-left:16px;}
.section-title::before{content:"";position:absolute;left:0;top:6px;bottom:6px;width:4px;border-radius:2px;background:var(--c-brand-600);}
.section-desc{font-size:15px;color:var(--c-ink-3);margin-top:8px;padding-left:16px;}
.section-more{font-size:15px;font-weight:500;white-space:nowrap;color:var(--c-brand-600);}
.section-more:hover{color:var(--c-brand-700);}
.nums{font-variant-numeric:tabular-nums;}

/* header */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:100;
  background:rgba(255,255,255,.94);
  border-bottom:1px solid var(--c-line);
  backdrop-filter:blur(6px);
  transition:height .25s ease,box-shadow .25s ease,background .25s ease;
}
.header-inner{
  display:grid;grid-template-columns:1fr auto 1fr;align-items:center;
  gap:16px;height:76px;transition:height .25s ease;
}
.site-header.is-scrolled{box-shadow:var(--sh-md);}
.site-header.is-scrolled .header-inner{height:64px;}
.nav{display:flex;align-items:center;gap:26px;}
.nav-right{justify-content:flex-end;gap:18px;}
.nav-link{
  position:relative;font-size:15px;font-weight:500;color:var(--c-ink-2);
  padding:6px 0;line-height:1.4;transition:color .2s ease;
}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;border-radius:2px;
  background:var(--c-brand-600);transform:scaleX(0);transform-origin:left;transition:transform .22s ease;
}
.nav-link:hover{color:var(--c-brand-600);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.is-active{color:var(--c-brand-600);font-weight:600;}
.nav-link.is-active::after{transform:scaleX(1);}
.brand{display:inline-flex;align-items:center;gap:10px;justify-self:center;}
.brand-mark{
  width:38px;height:38px;border-radius:11px;flex:0 0 auto;
  background:linear-gradient(140deg,var(--c-brand-600),var(--c-brand-500));
  color:#fff;font-weight:700;font-size:15px;letter-spacing:.5px;
  display:flex;align-items:center;justify-content:center;
  box-shadow:var(--sh-sm);
}
.brand-name{font-size:19px;font-weight:700;color:var(--c-ink);letter-spacing:.2px;display:inline-flex;align-items:baseline;gap:8px;}
.brand-sub{font-size:12px;font-weight:500;color:var(--c-ink-3);letter-spacing:1px;}

/* buttons */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 24px;border-radius:var(--r-btn);font-size:15px;font-weight:600;
  line-height:1.4;min-height:46px;cursor:pointer;border:1px solid transparent;
  transition:background .2s ease,color .2s ease,box-shadow .2s ease,transform .12s ease,border-color .2s ease;
}
.btn-sm{padding:9px 18px;min-height:40px;font-size:14px;}
.btn-primary{background:var(--c-brand-600);color:#fff;box-shadow:var(--sh-sm);}
.btn-primary:hover{background:var(--c-brand-700);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-md);}
.btn-primary:active{transform:translateY(1px);box-shadow:var(--sh-sm);}
.btn-secondary{background:#fff;border-color:var(--c-brand-300);color:var(--c-brand-600);}
.btn-secondary:hover{background:var(--c-brand-50);color:var(--c-brand-700);border-color:var(--c-brand-500);}
.btn-secondary:active{transform:translateY(1px);}
.btn-ghost{padding:8px 2px;min-height:auto;color:var(--c-brand-600);font-weight:600;background:none;}
.btn-ghost span{transition:transform .2s ease;display:inline-block;}
.btn-ghost:hover span{transform:translateX(4px);}
.btn.is-done{background:var(--c-accent-50);color:var(--c-accent);border-color:var(--c-accent);}
.btn.is-done:hover{background:var(--c-accent-50);color:var(--c-accent);transform:none;box-shadow:none;}

.hamburger{
  display:none;width:44px;height:44px;border-radius:var(--r-btn);
  align-items:center;justify-content:center;flex-direction:column;gap:5px;
  border:1px solid var(--c-line);background:#fff;
}
.hamburger span{display:block;width:18px;height:2px;border-radius:2px;background:var(--c-ink);}
.hamburger:hover{border-color:var(--c-brand-300);}

/* drawer */
.drawer-mask{position:fixed;inset:0;background:rgba(21,32,43,.42);z-index:120;opacity:0;transition:opacity .25s ease;}
.drawer-mask.is-open{opacity:1;}
.drawer{
  position:fixed;top:0;left:0;right:0;z-index:130;background:var(--c-surface);
  border-bottom-left-radius:18px;border-bottom-right-radius:18px;
  transform:translateY(-102%);transition:transform .3s cubic-bezier(.32,.72,0,1);
  padding:14px 20px 22px;box-shadow:var(--sh-lg);
}
.drawer.is-open{transform:translateY(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding-bottom:12px;border-bottom:1px solid var(--c-line);}
.drawer-close{width:44px;height:44px;font-size:24px;line-height:1;color:var(--c-ink-3);border-radius:var(--r-btn);}
.drawer-close:hover{color:var(--c-brand-600);background:var(--c-brand-50);}
.drawer-nav{display:flex;flex-direction:column;}
.drawer-link{
  display:flex;align-items:center;min-height:44px;font-size:16px;font-weight:500;
  color:var(--c-ink);border-bottom:1px solid var(--c-line);
}
.drawer-link:last-child{border-bottom:0;}
.drawer-link.is-active{color:var(--c-brand-600);font-weight:600;}

/* hero */
.hero{position:relative;overflow:hidden;background:var(--c-brand-50);padding:150px 0 88px;margin-top:0;}
.hero::before{
  content:"";position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-1.png');
  background-size:cover;background-position:center;opacity:.07;pointer-events:none;
}
.hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.55;
  background-image:linear-gradient(90deg,rgba(28,92,147,.055) 1px,transparent 1px),
                   linear-gradient(rgba(28,92,147,.055) 1px,transparent 1px);
  background-size:34px 34px;
}
.hero-grid{
  position:relative;z-index:1;
  display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center;
}
.hero-copy h1{
  font-size:40px;font-weight:700;line-height:1.28;color:var(--c-ink);
  margin:20px 0 16px;letter-spacing:-.2px;
}
.hero-sub{font-size:18px;line-height:1.7;color:var(--c-ink-2);max-width:520px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px;}
.hero-stats{display:flex;flex-wrap:wrap;gap:40px;margin-top:40px;padding-top:28px;border-top:1px solid var(--c-brand-300);}
.hero-stats li{display:flex;flex-direction:column;gap:2px;}
.stat-num{font-size:32px;font-weight:700;line-height:1.15;color:var(--c-brand-600);font-variant-numeric:tabular-nums;}
.stat-label{font-size:14px;color:var(--c-ink-3);}

.hero-visual{position:relative;}
.hero-cover{
  position:relative;border-radius:var(--r-lg);overflow:hidden;background:#fff;
  box-shadow:var(--sh-md);border:1px solid rgba(255,255,255,.9);
}
.hero-cover img{width:100%;aspect-ratio:7/5;object-fit:cover;}
.cover-tag{
  position:absolute;top:16px;left:16px;z-index:2;
  background:rgba(255,255,255,.94);color:var(--c-accent);
  font-size:12px;font-weight:600;padding:6px 14px;border-radius:999px;letter-spacing:.4px;
}
.cover-strip{
  position:absolute;left:16px;right:16px;bottom:16px;z-index:2;
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  background:rgba(18,63,102,.92);color:#fff;border-radius:12px;
  padding:12px 16px;font-size:13px;line-height:1.5;
}
.cover-strip b{font-weight:600;font-size:14px;}
.cover-strip em{font-style:normal;color:var(--c-brand-300);}

/* badges */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;border-radius:999px;font-size:12.5px;font-weight:500;line-height:1.6;
  white-space:nowrap;
}
.badge-accent{background:var(--c-accent-50);color:var(--c-accent);}
.badge-status{background:var(--c-brand-50);color:var(--c-brand-600);}
.badge-warm{background:rgba(224,122,63,.12);color:var(--c-warm);}

/* collection grid */
.grid-collection{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.card{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
  box-shadow:var(--sh-sm);overflow:hidden;
  transition:box-shadow .24s ease,transform .24s ease,border-color .24s ease;
}
.card:hover{box-shadow:var(--sh-lg);transform:translateY(-2px);border-color:var(--c-brand-300);}
.card-body{padding:20px 22px 22px;}
.card-thumb{position:relative;overflow:hidden;background:var(--c-brand-50);}
.card-thumb img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .4s ease;}
.card:hover .card-thumb img{transform:scale(1.03);}
.card h3{font-size:20px;font-weight:600;line-height:1.45;color:var(--c-ink);margin:12px 0 8px;}
.card h3 a{color:inherit;}
.card h3 a:hover{color:var(--c-brand-600);}
.card p{font-size:15px;color:var(--c-ink-2);line-height:1.75;}
.card-foot{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  margin-top:18px;padding-top:16px;border-top:1px solid var(--c-line);
  font-size:13px;color:var(--c-ink-3);
}
.card-major{grid-column:span 2;display:grid;grid-template-columns:1fr 1fr;}
.card-major .card-thumb{height:100%;}
.card-major .card-thumb img{height:100%;aspect-ratio:auto;min-height:280px;}
.card-major .card-body{padding:30px 30px 28px;display:flex;flex-direction:column;justify-content:center;}
.card-major h3{font-size:24px;}
.card-major p{font-size:15.5px;}

/* list rows */
.rows{border-top:1px solid var(--c-line);}
.list-row{
  position:relative;display:grid;grid-template-columns:64px 180px 1fr auto;
  gap:22px;align-items:center;padding:22px 0;border-bottom:1px solid var(--c-line);
  transition:background .2s ease,padding .2s ease;
}
.list-row::before{
  content:"";position:absolute;left:0;top:14px;bottom:14px;width:3px;border-radius:2px;
  background:var(--c-brand-600);transform:scaleY(0);transform-origin:center;transition:transform .22s ease;
}
.list-row:hover{background:#F6F9FC;padding-left:16px;}
.list-row:hover::before{transform:scaleY(1);}
.row-index{font-size:22px;font-weight:700;color:var(--c-brand-300);font-variant-numeric:tabular-nums;letter-spacing:-.5px;}
.row-thumb{border-radius:var(--r-img);overflow:hidden;background:var(--c-brand-50);}
.row-thumb img{width:100%;aspect-ratio:16/10;object-fit:cover;}
.row-main h3{font-size:18px;font-weight:600;color:var(--c-ink);line-height:1.45;}
.row-main h3 a{color:inherit;}
.row-main h3 a:hover{color:var(--c-brand-600);}
.row-main p{
  margin-top:8px;font-size:14.5px;color:var(--c-ink-2);line-height:1.7;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.row-meta{display:flex;flex-direction:column;align-items:flex-end;gap:10px;min-width:120px;}
.row-time{font-size:13px;color:var(--c-ink-3);font-variant-numeric:tabular-nums;}
.arrow-link{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--c-brand-600);}
.arrow-link span{transition:transform .2s ease;}
.arrow-link:hover span{transform:translateX(4px);}

/* latest cms */
.grid-posts{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.post-card{padding:24px 24px 20px;display:flex;flex-direction:column;}
.post-card .post-title{font-size:18px;font-weight:600;line-height:1.5;color:var(--c-ink);margin:14px 0 10px;}
.post-card .post-title a{color:inherit;}
.post-card .post-title a:hover{color:var(--c-brand-600);}
.post-sum{
  font-size:14.5px;color:var(--c-ink-2);line-height:1.75;flex:1;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.post-foot{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  margin-top:18px;padding-top:14px;border-top:1px solid var(--c-line);
}
.post-time{font-size:13px;color:var(--c-ink-3);font-variant-numeric:tabular-nums;}
.empty-state{
  grid-column:1/-1;border:1px dashed var(--c-brand-300);background:var(--c-surface-2);
  border-radius:var(--r-card);padding:48px 24px;text-align:center;
}
.empty-state p{font-size:15px;color:var(--c-ink-2);margin-bottom:18px;}

/* rail */
.rail{
  display:flex;gap:24px;overflow-x:auto;padding:6px 4px 22px;
  scroll-snap-type:x mandatory;-webkit-overflow-scrolling:touch;
  scrollbar-width:thin;
}
.rail::-webkit-scrollbar{height:8px;}
.rail::-webkit-scrollbar-thumb{background:var(--c-brand-300);border-radius:999px;}
.rail::-webkit-scrollbar-track{background:var(--c-surface-2);border-radius:999px;}
.rail .card{flex:0 0 calc((100% - 72px) / 4);scroll-snap-align:start;}

/* faq */
.faq-wrap{max-width:880px;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;
  padding:22px 4px;font-size:17px;font-weight:600;color:var(--c-ink);
  cursor:pointer;list-style:none;transition:color .2s ease;
}
.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:50%;
  border:1px solid var(--c-brand-300);color:var(--c-brand-600);
  display:flex;align-items:center;justify-content:center;font-size:14px;
  transition:transform .25s ease,background .25s ease;
}
.faq-item[open] summary{color:var(--c-brand-600);}
.faq-item[open] .faq-icon{transform:rotate(180deg);background:var(--c-brand-50);}
.faq-body{padding:0 4px 24px;font-size:15px;line-height:1.85;color:var(--c-ink-2);}

/* cta */
.cta-bar{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:26px;
  background:var(--c-brand-50);border:1px solid var(--c-brand-300);
  border-radius:var(--r-lg);padding:34px 36px;position:relative;overflow:hidden;
}
.cta-bar::before{
  content:"";position:absolute;right:-40px;top:-40px;width:220px;height:220px;border-radius:50%;
  background:url('/assets/images/backpic/back-2.webp') center/cover no-repeat;opacity:.12;
}
.cta-copy{position:relative;z-index:1;max-width:600px;}
.cta-copy h2{font-size:24px;font-weight:700;color:var(--c-ink);line-height:1.4;}
.cta-copy p{margin-top:8px;font-size:15px;color:var(--c-ink-2);}
.cta-actions{position:relative;z-index:1;display:flex;flex-wrap:wrap;gap:12px;}

/* footer */
.site-footer{background:#0F2A44;color:rgba(255,255,255,.8);margin-top:0;position:relative;}
.footer-top{
  position:absolute;top:0;left:0;right:0;height:6px;
  background:linear-gradient(90deg,var(--c-brand-600),var(--c-accent));
  opacity:.85;
}
.footer-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;
  padding:72px 0 44px;
}
.footer-brand .brand-name{color:#fff;}
.footer-brand p{margin-top:16px;font-size:14.5px;line-height:1.85;color:rgba(255,255,255,.72);max-width:320px;}
.footer-title{font-size:15px;font-weight:600;color:#fff;margin-bottom:18px;letter-spacing:.4px;}
.footer-list li{margin-bottom:12px;}
.footer-list a{font-size:14.5px;color:rgba(255,255,255,.72);}
.footer-list a:hover{color:#fff;}
.footer-list span{font-size:14.5px;color:rgba(255,255,255,.72);}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);
  padding:22px 0;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px;
  font-size:13.5px;color:rgba(255,255,255,.6);
}
.to-top{display:inline-flex;align-items:center;gap:8px;color:rgba(255,255,255,.75);font-size:13.5px;}
.to-top:hover{color:#fff;}

/* toast */
.toast{
  position:fixed;right:24px;bottom:24px;z-index:200;
  background:#fff;border-radius:12px;box-shadow:var(--sh-lg);
  border-left:4px solid var(--c-brand-600);
  padding:14px 20px;font-size:14px;color:var(--c-ink);
  opacity:0;transform:translateY(12px);pointer-events:none;
  transition:opacity .28s ease,transform .28s ease;
}
.toast.is-show{opacity:1;transform:translateY(0);}

@media (max-width:1279px){
  .hero-copy h1{font-size:36px;}
  .rail .card{flex:0 0 calc((100% - 48px) / 3);}
}
@media (max-width:1023px){
  :root{--sp-section:64px;}
  .nav-left .nav-link:nth-child(n+3){display:none;}
  .hero{padding:128px 0 64px;}
  .hero-grid{grid-template-columns:1fr;gap:40px;}
  .hero-sub{max-width:none;}
  .grid-collection{grid-template-columns:repeat(2,1fr);}
  .card-major{grid-column:span 2;grid-template-columns:1fr;}
  .card-major .card-thumb img{aspect-ratio:16/10;min-height:0;height:auto;}
  .grid-posts{grid-template-columns:repeat(2,1fr);}
  .list-row{grid-template-columns:44px 140px 1fr;gap:18px;}
  .row-meta{grid-column:3;align-items:flex-start;flex-direction:row;gap:14px;min-width:0;}
  .rail .card{flex:0 0 46%;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:34px;padding:56px 0 36px;}
}
@media (max-width:767px){
  :root{--sp-section:48px;}
  .container{padding:0 16px;}
  .header-inner{grid-template-columns:1fr auto;height:64px;}
  .nav-left,.nav-right{display:none;}
  .brand{justify-self:start;}
  .hamburger{display:flex;}
  .hero{padding:104px 0 48px;}
  .hero-copy h1{font-size:30px;line-height:1.34;}
  .hero-sub{font-size:16.5px;}
  .hero-stats{gap:26px;margin-top:30px;padding-top:22px;}
  .stat-num{font-size:26px;}
  .section-title{font-size:22px;}
  .section-head{flex-direction:column;align-items:flex-start;gap:12px;margin-bottom:26px;}
  .grid-collection{grid-template-columns:1fr;}
  .card-major{grid-column:span 1;}
  .grid-posts{grid-template-columns:1fr;}
  .list-row{grid-template-columns:1fr;gap:14px;padding:20px 0;}
  .row-index{font-size:18px;}
  .row-thumb{max-width:100%;}
  .row-meta{grid-column:auto;align-items:center;justify-content:space-between;width:100%;}
  .rail .card{flex:0 0 82%;}
  .cta-bar{padding:26px 20px;}
  .cta-copy h2{font-size:20px;}
  .cta-actions{width:100%;}
  .cta-actions .btn{flex:1 1 130px;}
  .footer-grid{grid-template-columns:1fr;gap:30px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .toast{left:16px;right:16px;bottom:16px;}
}
@media (max-width:479px){
  .hero-copy h1{font-size:26px;}
  .btn{padding:11px 18px;font-size:14.5px;}
  .hero-actions .btn{flex:1 1 100%;}
  .faq-item summary{font-size:16px;padding:18px 2px;}
  .card-body{padding:18px;}
}

/* roulang page: article */
:root{
  --c-brand-700:#123F66;
  --c-brand-600:#1C5C93;
  --c-brand-500:#2E7CB8;
  --c-brand-300:#A8C9E2;
  --c-brand-50:#EFF6FB;
  --c-accent:#17A2A6;
  --c-accent-50:#E7F6F6;
  --c-warm:#E07A3F;
  --c-bg:#F6F8FB;
  --c-surface:#FFFFFF;
  --c-surface-2:#EEF3F9;
  --c-line:#E2E8F0;
  --c-ink:#15202B;
  --c-ink-2:#43535F;
  --c-ink-3:#7A8996;
  --c-ok:#2E9E6B;
  --c-warn:#D9A02B;
  --c-err:#D2504B;
  --radius-card:14px;
  --radius-cover:20px;
  --radius-btn:10px;
  --radius-img:12px;
  --shadow-sm:0 1px 2px rgba(21,42,66,.06);
  --shadow-md:0 6px 18px rgba(21,42,66,.07),0 1px 2px rgba(21,42,66,.05);
  --shadow-hover:0 14px 32px rgba(21,42,66,.12);
  --container:1200px;
  --sec-gap:88px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--c-ink-2);
  background:var(--c-bg);
  overflow-x:hidden;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none;transition:color .18s ease}
button{font-family:inherit}
h1,h2,h3,h4{margin:0;color:var(--c-ink);font-weight:700;line-height:1.35}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}
.tnum{font-variant-numeric:tabular-nums}
::selection{background:var(--c-brand-300);color:var(--c-brand-700)}
:focus-visible{outline:2px solid var(--c-brand-600);outline-offset:2px;border-radius:6px}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:46px;padding:11px 24px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;line-height:1.2;cursor:pointer;
  border:1px solid transparent;transition:all .18s ease;background:none;
}
.btn-primary{background:var(--c-brand-600);color:#fff;box-shadow:var(--shadow-sm)}
.btn-primary:hover{background:var(--c-brand-700);transform:translateY(-1px);box-shadow:var(--shadow-md)}
.btn-primary:active{transform:translateY(1px);box-shadow:var(--shadow-sm)}
.btn-ghost{background:var(--c-surface);border-color:var(--c-brand-300);color:var(--c-brand-600)}
.btn-ghost:hover{background:var(--c-brand-50)}
.btn-ghost:active{background:var(--c-brand-300);color:var(--c-brand-700)}
.btn-text{padding:8px 4px;color:var(--c-brand-600);font-weight:600;min-height:auto}
.btn-text .arrow{display:inline-block;transition:transform .18s ease}
.btn-text:hover .arrow{transform:translateX(4px)}
.btn.is-done{background:var(--c-accent);border-color:var(--c-accent);color:#fff}

/* ---------- 徽章 / 标签 ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;border-radius:999px;font-size:12.5px;font-weight:500;line-height:1.6;
}
.badge-accent{background:var(--c-accent-50);color:#0E7C7F}
.badge-brand{background:var(--c-brand-50);color:var(--c-brand-600)}
.badge-warm{background:rgba(224,122,63,.12);color:#B85F2A}
.tag{
  display:inline-flex;align-items:center;padding:6px 14px;border-radius:999px;
  background:var(--c-surface-2);color:var(--c-ink-2);font-size:13.5px;border:1px solid transparent;
  transition:all .18s ease;
}
.tag:hover{background:var(--c-brand-50);color:var(--c-brand-600);border-color:var(--c-brand-300)}

/* ---------- 头部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;background:rgba(255,255,255,.96);
  border-bottom:1px solid var(--c-line);transition:box-shadow .22s ease,height .22s ease;
}
.site-header.is-scrolled{box-shadow:var(--shadow-md)}
.header-inner{
  display:grid;grid-template-columns:1fr auto 1fr;align-items:center;
  gap:24px;height:76px;transition:height .22s ease;
}
.site-header.is-scrolled .header-inner{height:64px}
.nav{display:flex;align-items:center;gap:28px}
.nav-left{justify-self:start}
.header-actions{justify-self:end;display:flex;align-items:center;gap:14px}
.nav-link{
  position:relative;font-size:15px;font-weight:500;color:var(--c-ink-2);
  padding:8px 2px;min-height:44px;display:inline-flex;align-items:center;
}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:2px;height:2px;border-radius:2px;
  background:var(--c-brand-600);transform:scaleX(0);transform-origin:left;transition:transform .2s ease;
}
.nav-link:hover{color:var(--c-brand-600)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.is-active{color:var(--c-brand-600);font-weight:600}
.nav-link.is-active::after{transform:scaleX(1)}
.brand{display:inline-flex;align-items:center;gap:10px;justify-self:center}
.brand-mark{
  width:38px;height:38px;border-radius:11px;display:grid;place-items:center;
  background:linear-gradient(150deg,var(--c-brand-600),var(--c-brand-500));
  color:#fff;font-size:13px;font-weight:700;letter-spacing:.5px;box-shadow:var(--shadow-sm);
}
.brand-name{font-size:17.5px;font-weight:700;color:var(--c-ink);display:flex;align-items:baseline;gap:6px;white-space:nowrap}
.brand-sub{font-size:12px;font-weight:500;color:var(--c-ink-3)}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:10px;border:1px solid var(--c-line);
  background:var(--c-surface);cursor:pointer;align-items:center;justify-content:center;
}
.nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--c-ink);position:relative}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;border-radius:2px;background:var(--c-ink);
}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}
.drawer-mask{
  position:fixed;inset:0;background:rgba(15,42,68,.42);opacity:0;visibility:hidden;
  transition:opacity .24s ease,visibility .24s ease;z-index:70;
}
.drawer-mask.is-open{opacity:1;visibility:visible}
.drawer{
  position:fixed;top:0;left:0;right:0;z-index:80;background:var(--c-surface);
  border-radius:0 0 18px 18px;box-shadow:var(--shadow-hover);
  transform:translateY(-104%);transition:transform .28s ease;padding:14px 0 22px;
}
.drawer.is-open{transform:translateY(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;height:56px}
.drawer-close{width:44px;height:44px;border-radius:10px;border:1px solid var(--c-line);background:var(--c-surface);font-size:18px;color:var(--c-ink-2);cursor:pointer}
.drawer-list{margin-top:8px}
.drawer-list a{
  display:flex;align-items:center;justify-content:space-between;
  min-height:48px;padding:0 4px;font-size:16px;color:var(--c-ink);border-bottom:1px solid var(--c-line);
}
.drawer-list a:last-child{border-bottom:0}
.drawer-list a:hover{color:var(--c-brand-600)}
.drawer-foot{margin-top:18px;display:flex;gap:12px;flex-wrap:wrap}

/* ---------- 页头主题区 ---------- */
.article-hero{
  position:relative;background:var(--c-brand-50);border-bottom:1px solid var(--c-line);
  padding:36px 0 48px;overflow:hidden;
}
.article-hero::before{
  content:"";position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-1.png');
  background-size:cover;background-position:center;opacity:.07;pointer-events:none;
}
.article-hero > .container{position:relative;z-index:1}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13.5px;color:var(--c-ink-3)}
.crumbs a{color:var(--c-ink-3)}
.crumbs a:hover{color:var(--c-brand-600)}
.crumbs .sep{color:var(--c-brand-300)}
.crumbs .now{color:var(--c-ink-2);max-width:340px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.hero-head{max-width:820px;margin-top:22px}
.hero-head h1{font-size:40px;font-weight:700;line-height:1.25;margin-top:14px;letter-spacing:-.4px}
.hero-meta{display:flex;flex-wrap:wrap;align-items:center;gap:14px;margin-top:20px;font-size:14px;color:var(--c-ink-3)}
.hero-meta .dot{width:4px;height:4px;border-radius:50%;background:var(--c-brand-300)}
.hero-cover{margin-top:32px;border-radius:var(--radius-cover);overflow:hidden;box-shadow:var(--shadow-md);background:var(--c-surface)}
.hero-cover img{width:100%;aspect-ratio:16/7;object-fit:cover}

/* ---------- 文章主体 ---------- */
.article-main{padding:56px 0 var(--sec-gap)}
.article-layout{
  display:grid;grid-template-columns:230px minmax(0,1fr);gap:48px;
  max-width:1060px;margin:0 auto;align-items:start;
}
.article-layout.no-toc{grid-template-columns:minmax(0,1fr)}
.toc{
  position:sticky;top:104px;background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:var(--radius-card);padding:18px 18px 20px;box-shadow:var(--shadow-sm);
}
.toc-title{font-size:13px;font-weight:600;letter-spacing:1px;color:var(--c-ink-3);text-transform:uppercase;margin-bottom:10px}
.toc a{
  display:block;padding:7px 0 7px 12px;font-size:14px;color:var(--c-ink-2);
  border-left:3px solid transparent;line-height:1.6;
}
.toc a:hover{color:var(--c-brand-600);background:var(--c-brand-50)}
.toc a.is-current{color:var(--c-brand-600);border-left-color:var(--c-brand-600);font-weight:600;background:var(--c-brand-50)}
.toc a.lv3{padding-left:24px;font-size:13.5px;color:var(--c-ink-3)}

.article-card{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--radius-cover);
  padding:40px 44px 44px;box-shadow:var(--shadow-sm);
}
.article-body{font-size:17px;line-height:1.9;color:var(--c-ink-2);max-width:760px}
.article-body > * + *{margin-top:1.1em}
.article-body h2{
  font-size:24px;line-height:1.4;margin-top:40px;padding-left:14px;position:relative;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.18em;bottom:.18em;width:4px;border-radius:2px;background:var(--c-brand-600);
}
.article-body h3{font-size:20px;line-height:1.5;margin-top:30px}
.article-body h4{font-size:17px;margin-top:24px}
.article-body strong{color:var(--c-ink)}
.article-body a{color:var(--c-brand-600);text-decoration:underline;text-underline-offset:3px;text-decoration-color:var(--c-brand-300)}
.article-body a:hover{color:var(--c-brand-700);text-decoration-color:var(--c-brand-600)}
.article-body ul,.article-body ol{padding-left:1.3em}
.article-body ul{list-style:disc}
.article-body ol{list-style:decimal}
.article-body li{margin:.45em 0}
.article-body ul::marker,.article-body ol::marker{color:var(--c-brand-500)}
.article-body li::marker{color:var(--c-brand-500);font-weight:600}
.article-body blockquote{
  margin:26px 0;padding:16px 20px;background:var(--c-brand-50);
  border-left:3px solid var(--c-brand-600);border-radius:0 10px 10px 0;color:var(--c-ink);
}
.article-body blockquote p{margin:0}
.article-body img{border-radius:var(--radius-img);margin:26px auto;box-shadow:var(--shadow-sm)}
.article-body figure{margin:26px 0}
.article-body figcaption{font-size:13px;color:var(--c-ink-3);text-align:center;margin-top:10px}
.article-body code{
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:14.5px;
  background:var(--c-surface-2);padding:2px 6px;border-radius:6px;color:var(--c-brand-700);
}
.article-body pre{
  background:#F3F6FA;border:1px solid var(--c-line);border-radius:12px;padding:16px 18px;overflow-x:auto;
}
.article-body pre code{background:none;padding:0;color:var(--c-ink)}
.article-body table{width:100%;border-collapse:collapse;font-size:15px;margin:26px 0;border:1px solid var(--c-line);border-radius:12px;overflow:hidden}
.article-body th,.article-body td{border:1px solid var(--c-line);padding:11px 14px;text-align:left}
.article-body th{background:var(--c-surface-2);color:var(--c-ink);font-weight:600}
.article-body tbody tr:nth-child(even){background:#FAFCFE}
.article-body hr{border:0;border-top:1px solid var(--c-line);margin:34px 0}
.empty-state{
  border:1px dashed var(--c-brand-300);background:var(--c-surface-2);border-radius:var(--radius-card);
  padding:44px 28px;text-align:center;
}
.empty-state h2{font-size:20px}
.empty-state p{margin:10px 0 20px;color:var(--c-ink-3)}

/* ---------- 文末区域 ---------- */
.article-foot{margin-top:34px;display:flex;flex-direction:column;gap:26px}
.tag-row{display:flex;flex-wrap:wrap;gap:10px;align-items:center}
.tag-row .label{font-size:13.5px;color:var(--c-ink-3);margin-right:4px}
.cta-bar{
  position:relative;overflow:hidden;background:var(--c-brand-50);border:1px solid var(--c-brand-300);
  border-radius:var(--radius-cover);padding:26px 30px;display:flex;flex-wrap:wrap;
  align-items:center;justify-content:space-between;gap:20px;
}
.cta-bar::after{
  content:"";position:absolute;right:-40px;top:-30px;width:220px;height:220px;border-radius:50%;
  background:radial-gradient(circle at 30% 30%,rgba(46,124,184,.16),rgba(46,124,184,0));
}
.cta-bar > *{position:relative;z-index:1}
.cta-copy h3{font-size:20px;line-height:1.5}
.cta-copy p{font-size:14.5px;color:var(--c-ink-2);margin-top:6px}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}

.related h2,.faq-block h2{font-size:28px;line-height:1.35}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:26px}
.section-head p{font-size:14.5px;color:var(--c-ink-3);margin-top:8px}
.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.card{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--radius-card);
  overflow:hidden;box-shadow:var(--shadow-sm);transition:all .22s ease;display:flex;flex-direction:column;
}
.card:hover{border-color:var(--c-brand-300);box-shadow:var(--shadow-hover);transform:translateY(-2px)}
.card-cover{position:relative;background:var(--c-brand-50);aspect-ratio:16/10;overflow:hidden}
.card-cover img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease}
.card:hover .card-cover img{transform:scale(1.03)}
.card-cover .corner{position:absolute;left:12px;top:12px}
.card-body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:10px;flex:1}
.card-body h3{font-size:18px;line-height:1.5}
.card-body p{font-size:14.5px;color:var(--c-ink-2);line-height:1.75}
.card-foot{display:flex;align-items:center;justify-content:space-between;margin-top:auto;padding-top:14px;border-top:1px solid var(--c-line)}
.card-foot .date{font-size:13px;color:var(--c-ink-3)}

/* ---------- FAQ ---------- */
.faq-block{margin-top:var(--sec-gap)}
.faq{border-top:1px solid var(--c-line)}
.faq details{border-bottom:1px solid var(--c-line)}
.faq summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 4px;font-size:17px;font-weight:600;color:var(--c-ink);min-height:44px;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary:hover{color:var(--c-brand-600)}
.faq summary .ico{flex:0 0 auto;width:22px;height:22px;border-radius:50%;background:var(--c-brand-50);color:var(--c-brand-600);display:grid;place-items:center;font-size:13px;transition:transform .22s ease}
.faq details[open] summary{color:var(--c-brand-600)}
.faq details[open] summary .ico{transform:rotate(180deg)}
.faq .ans{padding:0 4px 22px;font-size:15px;line-height:1.85;color:var(--c-ink-2);max-width:820px}

/* ---------- 返回栏 ---------- */
.back-row{margin-top:32px;display:flex;flex-wrap:wrap;gap:20px;align-items:center;font-size:15px}
.back-row a{color:var(--c-brand-600);font-weight:600}
.back-row a:hover{color:var(--c-brand-700)}

/* ---------- 页脚 ---------- */
.site-footer{position:relative;background:#0F2A44;color:rgba(255,255,255,.8);margin-top:var(--sec-gap)}
.footer-top{display:block;height:6px;background:linear-gradient(90deg,var(--c-brand-500),var(--c-accent))}
.site-footer .container{padding-top:56px;padding-bottom:24px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:36px}
.footer-brand .brand{margin-bottom:16px}
.footer-brand .brand-mark{background:rgba(255,255,255,.14);box-shadow:none}
.footer-brand .brand-name{color:#fff}
.footer-brand .brand-sub{color:rgba(255,255,255,.55)}
.footer-brand p{font-size:14px;line-height:1.85;color:rgba(255,255,255,.72);max-width:320px}
.footer-title{font-size:15px;color:#fff;margin-bottom:16px;font-weight:600}
.footer-list li{margin-bottom:11px}
.footer-list a,.footer-list span{font-size:14px;color:rgba(255,255,255,.72)}
.footer-list a:hover{color:#fff}
.footer-bottom{
  margin-top:40px;padding-top:20px;border-top:1px solid rgba(255,255,255,.14);
  display:flex;flex-wrap:wrap;gap:14px;align-items:center;justify-content:space-between;
  font-size:13.5px;color:rgba(255,255,255,.6);
}
.to-top{color:rgba(255,255,255,.8);display:inline-flex;align-items:center;gap:6px}
.to-top:hover{color:#fff}
.toast{
  position:fixed;right:24px;bottom:28px;z-index:120;background:var(--c-surface);
  border-left:4px solid var(--c-brand-600);border-radius:10px;box-shadow:var(--shadow-hover);
  padding:13px 20px;font-size:14px;color:var(--c-ink);opacity:0;transform:translateY(12px);
  transition:opacity .25s ease,transform .25s ease;pointer-events:none;
}
.toast.is-show{opacity:1;transform:translateY(0)}

/* ---------- 响应式 ---------- */
@media (max-width:1199px){
  .article-layout{grid-template-columns:minmax(0,1fr);gap:0}
  .toc{display:none}
  .hero-head h1{font-size:34px}
}
@media (max-width:1023px){
  :root{--sec-gap:64px}
  .nav{display:none}
  .nav-toggle{display:inline-flex}
  .header-inner{grid-template-columns:auto 1fr auto;height:64px}
  .brand{justify-self:start}
  .header-actions .btn{display:none}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px}
  .grid-3{grid-template-columns:repeat(2,minmax(0,1fr))}
  .article-card{padding:32px 28px 34px}
  .hero-cover img{aspect-ratio:16/8}
}
@media (max-width:767px){
  :root{--sec-gap:48px}
  .container{padding:0 16px}
  .header-inner{gap:12px}
  .brand-sub{display:none}
  .hero-head h1{font-size:28px}
  .article-hero{padding:26px 0 34px}
  .hero-meta{gap:10px;font-size:13.5px}
  .article-main{padding:36px 0 var(--sec-gap)}
  .article-card{padding:24px 18px 28px;border-radius:16px}
  .article-body{font-size:16px}
  .article-body h2{font-size:21px}
  .article-body h3{font-size:18.5px}
  .grid-3{grid-template-columns:minmax(0,1fr)}
  .cta-bar{padding:22px 20px}
  .cta-actions{width:100%}
  .cta-actions .btn{flex:1 1 auto}
  .footer-grid{grid-template-columns:1fr}
  .section-head{flex-direction:column;align-items:flex-start}
  .toast{right:16px;left:16px;bottom:16px}
}
@media (max-width:480px){
  .hero-head h1{font-size:25px}
  .article-body{font-size:15.5px}
  .btn{padding:11px 18px;font-size:14.5px}
  .footer-bottom{font-size:12.5px}
}

/* roulang page: category1 */
:root{
  --c-brand-700:#123F66;
  --c-brand-600:#1C5C93;
  --c-brand-500:#2E7CB8;
  --c-brand-300:#A8C9E2;
  --c-brand-50:#EFF6FB;
  --c-accent:#17A2A6;
  --c-accent-50:#E7F6F6;
  --c-warm:#E07A3F;
  --c-bg:#F6F8FB;
  --c-surface:#FFFFFF;
  --c-surface-2:#EEF3F9;
  --c-line:#E2E8F0;
  --c-ink:#15202B;
  --c-ink-2:#43535F;
  --c-ink-3:#7A8996;
  --c-ok:#2E9E6B;
  --c-warn:#D9A02B;
  --c-err:#D2504B;
  --r-card:14px;
  --r-lg:20px;
  --r-btn:10px;
  --r-img:12px;
  --shadow-sm:0 1px 2px rgba(21,42,66,.06);
  --shadow-md:0 6px 18px rgba(21,42,66,.07),0 1px 2px rgba(21,42,66,.05);
  --shadow-hover:0 14px 32px rgba(21,42,66,.12);
  --container:1200px;
  --font:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.8;
  color:var(--c-ink-2);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{margin:0;color:var(--c-ink);font-weight:700;line-height:1.35}
p{margin:0}
a{color:inherit;text-decoration:none}
ul,ol{margin:0;padding:0;list-style:none}
img{max-width:100%;display:block;border:0}
button{font:inherit;color:inherit;cursor:pointer;border:0;background:none}
:focus-visible{outline:2px solid var(--c-brand-600);outline-offset:2px;border-radius:4px}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 24px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;line-height:1.4;
  border:1px solid transparent;
  transition:background-color .22s ease,color .22s ease,box-shadow .22s ease,transform .22s ease,border-color .22s ease;
}
.btn-primary{background:var(--c-brand-600);color:#fff;box-shadow:var(--shadow-sm)}
.btn-primary:hover{background:var(--c-brand-700);transform:translateY(-1px);box-shadow:var(--shadow-md)}
.btn-primary:active{transform:translateY(1px);box-shadow:none}
.btn-secondary{background:#fff;border-color:var(--c-brand-300);color:var(--c-brand-600)}
.btn-secondary:hover{background:var(--c-brand-50);border-color:var(--c-brand-500)}
.btn-secondary:active{transform:translateY(1px)}
.btn-ghost{color:var(--c-brand-600);padding:12px 4px}
.btn-ghost .arrow{transition:transform .22s ease}
.btn-ghost:hover .arrow{transform:translateX(4px)}
.btn-sm{padding:9px 18px;font-size:14px}
.btn.is-done{color:var(--c-accent);border-color:var(--c-accent);background:var(--c-accent-50)}

/* ============ 徽章 ============ */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;border-radius:999px;
  font-size:12.5px;font-weight:500;line-height:1.7;white-space:nowrap;
}
.badge-accent{background:var(--c-accent-50);color:var(--c-accent)}
.badge-brand{background:var(--c-brand-50);color:var(--c-brand-600)}
.badge-warm{background:rgba(224,122,63,.12);color:var(--c-warm)}

/* ============ 页头导航 ============ */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(255,255,255,.96);
  border-bottom:1px solid var(--c-line);
  transition:box-shadow .25s ease;
}
.site-header.is-scrolled{box-shadow:var(--shadow-md)}
.header-inner{
  display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:18px;
  height:76px;transition:height .25s ease;
}
.site-header.is-scrolled .header-inner{height:64px}
.nav{display:flex;align-items:center;gap:26px}
.nav-left{justify-self:start}
.nav-right{justify-self:end;gap:14px}
.nav-link{
  position:relative;display:inline-flex;align-items:center;
  font-size:15px;color:var(--c-ink-2);padding:8px 2px;
  transition:color .2s ease;white-space:nowrap;
}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:2px;height:2px;border-radius:2px;
  background:var(--c-brand-600);transform:scaleX(0);transform-origin:left;
  transition:transform .24s ease;
}
.nav-link:hover{color:var(--c-brand-600)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.is-active{color:var(--c-brand-600);font-weight:600}
.nav-link.is-active::after{transform:scaleX(1)}
.brand{display:inline-flex;align-items:center;gap:10px;justify-self:center}
.brand-mark{
  width:38px;height:38px;border-radius:11px;flex:0 0 auto;
  background:linear-gradient(135deg,var(--c-brand-600),var(--c-brand-500));
  color:#fff;display:grid;place-items:center;
  font-size:15px;font-weight:700;letter-spacing:.5px;box-shadow:var(--shadow-sm);
}
.brand-name{display:flex;flex-direction:column;line-height:1.15;font-size:18px;font-weight:700;color:var(--c-ink)}
.brand-sub{font-size:11px;font-weight:500;letter-spacing:1.5px;color:var(--c-ink-3)}
.menu-toggle{
  display:none;width:44px;height:44px;border-radius:var(--r-btn);
  border:1px solid var(--c-line);background:#fff;
  align-items:center;justify-content:center;flex-direction:column;gap:5px;
  transition:border-color .2s ease,background-color .2s ease;
}
.menu-toggle:hover{border-color:var(--c-brand-300);background:var(--c-brand-50)}
.menu-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--c-ink)}

/* 移动端抽屉 */
.mobile-drawer{
  position:fixed;inset:0;z-index:60;
  background:rgba(15,42,68,.45);
  opacity:0;visibility:hidden;transition:opacity .25s ease,visibility .25s ease;
}
.mobile-drawer.is-open{opacity:1;visibility:visible}
.drawer-panel{
  background:#fff;border-radius:0 0 var(--r-lg) var(--r-lg);
  padding:16px 20px 26px;
  transform:translateY(-100%);transition:transform .3s ease;
  box-shadow:var(--shadow-md);
}
.mobile-drawer.is-open .drawer-panel{transform:translateY(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding-bottom:10px}
.drawer-title{font-size:16px;font-weight:700;color:var(--c-ink)}
.drawer-close{
  width:44px;height:44px;border-radius:var(--r-btn);
  display:grid;place-items:center;font-size:20px;color:var(--c-ink-3);
  border:1px solid var(--c-line);background:#fff;
}
.drawer-close:hover{color:var(--c-brand-600);border-color:var(--c-brand-300)}
.drawer-link{
  display:flex;align-items:center;justify-content:space-between;
  height:44px;padding:0 2px;font-size:16px;color:var(--c-ink);
  border-bottom:1px solid var(--c-line);transition:color .2s ease,padding-left .2s ease;
}
.drawer-link:hover{color:var(--c-brand-600);padding-left:6px}
.drawer-link.is-active{color:var(--c-brand-600);font-weight:600}
.drawer-cta{margin-top:18px;display:flex;gap:12px;flex-wrap:wrap}
.drawer-cta .btn{flex:1 1 160px}

/* ============ Hero ============ */
.hero{position:relative;padding:44px 0 68px;background:var(--c-brand-50);overflow:hidden;border-bottom:1px solid var(--c-line)}
.hero::before{
  content:"";position:absolute;inset:0;
  background-image:url("/assets/images/backpic/back-1.png");
  background-size:cover;background-position:center;
  opacity:.07;pointer-events:none;
}
.hero .container{position:relative;z-index:1}
.breadcrumb{margin-bottom:22px}
.breadcrumb ol{display:flex;align-items:center;flex-wrap:wrap;gap:8px;font-size:13.5px;color:var(--c-ink-3)}
.breadcrumb li+li::before{content:"/";margin-right:8px;color:var(--c-brand-300)}
.breadcrumb a{transition:color .2s ease}
.breadcrumb a:hover{color:var(--c-brand-600)}
.breadcrumb [aria-current]{color:var(--c-ink-2)}
.hero-grid{display:grid;grid-template-columns:1.06fr .94fr;gap:48px;align-items:center}
.hero h1{font-size:clamp(30px,4.2vw,40px);font-weight:700;line-height:1.25;margin:16px 0 18px}
.hero-lead{font-size:17px;line-height:1.85;color:var(--c-ink-2);max-width:560px}
.hero-note{margin-top:12px;font-size:15px;color:var(--c-ink-3);max-width:560px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:26px}
.stats{display:flex;flex-wrap:wrap;gap:36px;margin-top:34px;padding-top:26px;border-top:1px solid var(--c-brand-300)}
.stat-num{
  font-size:32px;font-weight:700;line-height:1.1;color:var(--c-brand-700);
  font-variant-numeric:tabular-nums;
}
.stat-label{margin-top:4px;font-size:13px;color:var(--c-ink-3)}
.hero-media{border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--shadow-md);background:#fff;border:1px solid var(--c-line)}
.hero-media img{width:100%;height:auto;aspect-ratio:16/10;object-fit:cover}

/* ============ 板块 ============ */
.section{padding:88px 0}
.section--surface{background:var(--c-surface);border-top:1px solid var(--c-line);border-bottom:1px solid var(--c-line)}
.section--tight{padding:72px 0}
.section-head{max-width:760px;margin-bottom:38px}
.section-title{
  position:relative;padding-left:16px;
  font-size:clamp(23px,2.6vw,28px);font-weight:700;line-height:1.35;
}
.section-title::before{
  content:"";position:absolute;left:0;top:5px;bottom:5px;width:4px;border-radius:3px;background:var(--c-brand-600);
}
.section-desc{margin-top:14px;font-size:15.5px;line-height:1.85;color:var(--c-ink-3)}

/* 筛选标签 */
.filter-bar{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:30px}
.filter-tag{
  padding:9px 18px;border-radius:999px;border:1px solid var(--c-line);
  background:#fff;font-size:14px;color:var(--c-ink-2);
  transition:background-color .2s ease,color .2s ease,border-color .2s ease,transform .2s ease;
}
.filter-tag:hover{border-color:var(--c-brand-300);background:var(--c-brand-50);color:var(--c-brand-600);transform:translateY(-1px)}
.filter-tag.is-active{background:var(--c-brand-600);border-color:var(--c-brand-600);color:#fff;font-weight:600}

/* 卡片网格 */
.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.card{
  display:flex;flex-direction:column;
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);
  box-shadow:var(--shadow-sm);overflow:hidden;
  transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
}
.card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:var(--c-brand-300)}
.card-media{position:relative;aspect-ratio:16/10;overflow:hidden;background:var(--c-brand-50)}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .45s ease}
.card:hover .card-media img{transform:scale(1.04)}
.card-body{display:flex;flex-direction:column;gap:10px;flex:1;padding:20px 22px 22px}
.card-title{font-size:19px;font-weight:600;line-height:1.45}
.card-desc{
  font-size:14.5px;line-height:1.75;color:var(--c-ink-2);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.card-meta{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  margin-top:auto;padding-top:14px;border-top:1px solid var(--c-line);
  font-size:13px;color:var(--c-ink-3);
}
.card-link{display:inline-flex;align-items:center;gap:6px;font-size:13.5px;font-weight:600;color:var(--c-brand-600)}
.card-link .arrow{transition:transform .22s ease}
.card:hover .card-link .arrow{transform:translateX(4px)}
.card.feature{
  grid-column:span 2;
  display:grid;grid-template-columns:1.03fr 1fr;
}
.card.feature .card-media{aspect-ratio:auto;height:100%;min-height:250px}
.card.feature .card-body{padding:28px 30px}
.card.feature .card-title{font-size:22px}
.card.feature .card-desc{-webkit-line-clamp:3;font-size:15px}

/* 分页器 */
.pager{display:flex;justify-content:center;align-items:center;flex-wrap:wrap;gap:8px;margin-top:46px}
.pager a,.pager span{
  min-width:44px;height:44px;padding:0 14px;
  display:inline-flex;align-items:center;justify-content:center;
  border-radius:var(--r-btn);border:1px solid var(--c-line);background:#fff;
  font-size:14.5px;color:var(--c-ink-2);font-variant-numeric:tabular-nums;
  transition:background-color .2s ease,color .2s ease,border-color .2s ease,transform .2s ease;
}
.pager a:hover{border-color:var(--c-brand-300);background:var(--c-brand-50);color:var(--c-brand-600);transform:translateY(-1px)}
.pager .is-current{background:var(--c-brand-600);border-color:var(--c-brand-600);color:#fff;font-weight:600}
.pager .is-disabled{opacity:.45;cursor:not-allowed;pointer-events:none}

/* 上手路径 */
.steps{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:22px}
.step{
  position:relative;background:#fff;border:1px solid var(--c-line);
  border-radius:var(--r-card);box-shadow:var(--shadow-sm);
  padding:26px 22px 24px;overflow:hidden;
  transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
}
.step::after{
  content:"";position:absolute;left:0;right:0;top:0;height:3px;
  background:linear-gradient(90deg,var(--c-brand-600),var(--c-accent));
  opacity:0;transition:opacity .25s ease;
}
.step:hover{transform:translateY(-2px);box-shadow:var(--shadow-md);border-color:var(--c-brand-300)}
.step:hover::after{opacity:1}
.step-num{font-size:13px;font-weight:700;letter-spacing:2px;color:var(--c-brand-500);font-variant-numeric:tabular-nums}
.step h3{margin:12px 0 10px;font-size:18px;font-weight:600;line-height:1.45}
.step p{font-size:14.5px;line-height:1.8;color:var(--c-ink-2)}

/* FAQ */
.faq{max-width:860px;margin:0 auto}
.faq-item{border-bottom:1px solid var(--c-line)}
.faq-item:first-child{border-top:1px solid var(--c-line)}
.faq summary{
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:20px 2px;font-size:17px;font-weight:600;color:var(--c-ink);
  cursor:pointer;list-style:none;transition:color .2s ease;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::marker{content:""}
.faq summary:hover{color:var(--c-brand-600)}
.faq-item[open] summary{color:var(--c-brand-600)}
.faq-icon{
  flex:0 0 auto;width:26px;height:26px;border-radius:50%;
  display:grid;place-items:center;border:1px solid var(--c-line);
  font-size:12px;color:var(--c-ink-3);
  transition:transform .25s ease,color .25s ease,border-color .25s ease;
}
.faq-item[open] .faq-icon{transform:rotate(180deg);color:var(--c-brand-600);border-color:var(--c-brand-300)}
.faq-answer{padding:0 2px 22px;font-size:15px;line-height:1.85;color:var(--c-ink-2);max-width:740px}

/* CTA 条 */
.cta-bar{
  position:relative;overflow:hidden;
  display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;
  padding:34px 36px;border-radius:var(--r-lg);
  background:var(--c-brand-50);border:1px solid var(--c-brand-300);
}
.cta-bar::before{
  content:"";position:absolute;right:-40px;top:-40px;width:220px;height:220px;border-radius:50%;
  background:var(--c-accent);opacity:.06;pointer-events:none;
}
.cta-copy{position:relative;z-index:1;max-width:620px}
.cta-copy h2{font-size:clamp(20px,2.3vw,24px);font-weight:700;line-height:1.45}
.cta-copy p{margin-top:10px;font-size:15px;color:var(--c-ink-2)}
.cta-actions{position:relative;z-index:1;display:flex;flex-wrap:wrap;gap:12px}

/* 页脚 */
.site-footer{position:relative;background:#0F2A44;color:rgba(255,255,255,.8);margin-top:0}
.footer-top{display:block;height:6px;background:linear-gradient(90deg,var(--c-brand-600),var(--c-accent))}
.footer-grid{
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:36px;
  padding:58px 0 38px;
}
.footer-brand .brand-mark{background:linear-gradient(135deg,var(--c-brand-500),var(--c-accent))}
.footer-brand .brand-name{color:#fff}
.footer-brand .brand-sub{color:rgba(255,255,255,.55)}
.footer-brand p{margin-top:16px;max-width:330px;font-size:14px;line-height:1.85;color:rgba(255,255,255,.72)}
.footer-title{margin-bottom:16px;font-size:15px;font-weight:600;color:#fff}
.footer-list li{margin-bottom:10px;font-size:14px}
.footer-list a,.footer-list span{color:rgba(255,255,255,.78);transition:color .2s ease,padding-left .2s ease}
.footer-list a:hover{color:#fff;padding-left:4px}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  padding:18px 0 26px;border-top:1px solid rgba(255,255,255,.12);
  font-size:13.5px;color:rgba(255,255,255,.7);
}
.to-top{display:inline-flex;align-items:center;gap:6px;color:rgba(255,255,255,.85);transition:color .2s ease,transform .2s ease}
.to-top:hover{color:#fff;transform:translateY(-2px)}

/* Toast */
.toast{
  position:fixed;right:24px;bottom:24px;z-index:80;
  padding:14px 20px;border-radius:var(--r-btn);
  background:#fff;border-left:4px solid var(--c-brand-600);
  box-shadow:var(--shadow-hover);font-size:14px;color:var(--c-ink);
  opacity:0;transform:translateY(16px);pointer-events:none;
  transition:opacity .28s ease,transform .28s ease;
}
.toast.is-show{opacity:1;transform:translateY(0)}

/* ============ 响应式 ============ */
@media (max-width:1024px){
  .section{padding:64px 0}
  .section--tight{padding:56px 0}
  .hero{padding:34px 0 56px}
  .hero-grid{grid-template-columns:1fr;gap:34px}
  .hero-media{order:-1}
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .steps{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px}
}
@media (max-width:900px){
  .nav-left,.nav-right{display:none}
  .menu-toggle{display:inline-flex}
  .header-inner{display:flex;align-items:center;justify-content:space-between;height:64px}
  .site-header.is-scrolled .header-inner{height:60px}
  .brand{justify-self:flex-start}
}
@media (max-width:768px){
  .container{padding:0 16px}
  .section{padding:48px 0}
  .card-grid{grid-template-columns:1fr;gap:18px}
  .card.feature{grid-column:span 1;grid-template-columns:1fr}
  .card.feature .card-media{aspect-ratio:16/10;height:auto;min-height:0}
  .card.feature .card-body{padding:22px 22px 24px}
  .card.feature .card-title{font-size:19px}
  .steps{grid-template-columns:1fr}
  .cta-bar{padding:26px 22px}
  .cta-actions{width:100%}
  .cta-actions .btn{flex:1 1 140px}
  .stats{gap:24px}
  .stat-num{font-size:26px}
  .footer-grid{grid-template-columns:1fr;gap:26px;padding:44px 0 30px}
  .toast{right:16px;left:16px;bottom:16px}
}
@media (max-width:520px){
  body{font-size:15.5px}
  .hero h1{margin:12px 0 14px}
  .hero-lead{font-size:15.5px}
  .brand-name{font-size:16px}
  .brand-mark{width:34px;height:34px;font-size:13px}
  .card-body{padding:18px}
  .btn{padding:11px 18px;font-size:14.5px}
  .pager a,.pager span{min-width:40px;height:40px;padding:0 10px}
  .faq summary{font-size:16px;padding:17px 2px}
}

/* roulang page: category2 */
:root{
  --c-brand-700:#123F66;
  --c-brand-600:#1C5C93;
  --c-brand-500:#2E7CB8;
  --c-brand-300:#A8C9E2;
  --c-brand-50:#EFF6FB;
  --c-accent:#17A2A6;
  --c-accent-50:#E7F6F6;
  --c-warm:#E07A3F;
  --c-bg:#F6F8FB;
  --c-surface:#FFFFFF;
  --c-surface-2:#EEF3F9;
  --c-line:#E2E8F0;
  --c-ink:#15202B;
  --c-ink-2:#43535F;
  --c-ink-3:#7A8996;
  --c-ok:#2E9E6B;
  --c-warn:#D9A02B;
  --c-err:#D2504B;
  --r-card:14px;
  --r-lg:20px;
  --r-btn:10px;
  --r-img:12px;
  --sh-sm:0 1px 2px rgba(21,42,66,.06);
  --sh-md:0 6px 18px rgba(21,42,66,.07),0 1px 2px rgba(21,42,66,.05);
  --sh-lg:0 14px 32px rgba(21,42,66,.12);
  --font:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:110px;}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.8;
  color:var(--c-ink-2);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{margin:0;color:var(--c-ink);font-weight:700;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
a{color:inherit;text-decoration:none;}
img{display:block;max-width:100%;height:auto;}
button{font-family:inherit;font-size:inherit;border:0;background:none;cursor:pointer;color:inherit;}
input,textarea{font-family:inherit;font-size:inherit;}
:focus-visible{outline:2px solid var(--c-brand-600);outline-offset:2px;border-radius:4px;}
::selection{background:var(--c-brand-300);color:var(--c-brand-700);}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 24px;border-radius:var(--r-btn);font-size:15px;font-weight:600;
  line-height:1.4;transition:background-color .2s ease,color .2s ease,box-shadow .2s ease,transform .2s ease,border-color .2s ease;
  border:1px solid transparent;white-space:nowrap;min-height:44px;
}
.btn-sm{padding:9px 18px;font-size:14px;min-height:40px;}
.btn-primary{background:var(--c-brand-600);color:#fff;box-shadow:var(--sh-sm);}
.btn-primary:hover{background:var(--c-brand-700);box-shadow:var(--sh-md);transform:translateY(-1px);}
.btn-primary:active{transform:translateY(1px);box-shadow:var(--sh-sm);}
.btn-ghost{background:var(--c-surface);color:var(--c-brand-600);border-color:var(--c-brand-300);}
.btn-ghost:hover{background:var(--c-brand-50);border-color:var(--c-brand-500);}
.btn-ghost:active{transform:translateY(1px);}
.btn.is-done{background:var(--c-accent-50);color:var(--c-accent);border-color:var(--c-accent);}
.link-arrow{display:inline-flex;align-items:center;gap:6px;color:var(--c-brand-600);font-weight:600;font-size:15px;}
.link-arrow span{transition:transform .2s ease;}
.link-arrow:hover span{transform:translateX(4px);}
.link-arrow:hover{color:var(--c-brand-700);}

/* ---------- 徽章 ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;padding:4px 12px;border-radius:999px;
  font-size:12.5px;font-weight:500;line-height:1.7;white-space:nowrap;
}
.badge-accent{background:var(--c-accent-50);color:var(--c-accent);}
.badge-brand{background:var(--c-brand-50);color:var(--c-brand-600);}
.badge-warm{background:rgba(224,122,63,.1);color:var(--c-warm);}

/* ---------- 头部 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;background:#fff;
  border-bottom:1px solid var(--c-line);
  transition:box-shadow .25s ease;
}
.site-header.is-scrolled{box-shadow:var(--sh-md);}
.header-inner{
  display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:20px;
  height:76px;transition:height .25s ease;
}
.site-header.is-scrolled .header-inner{height:64px;}
.nav{display:flex;align-items:center;gap:4px;}
.nav-left{justify-content:flex-start;}
.nav-right{justify-content:flex-end;gap:14px;}
.nav-link{
  position:relative;display:inline-flex;align-items:center;padding:9px 13px;border-radius:8px;
  font-size:15px;color:var(--c-ink-2);transition:color .2s ease,background-color .2s ease;
}
.nav-link:hover{color:var(--c-brand-600);background:var(--c-brand-50);}
.nav-link.is-active{color:var(--c-brand-600);font-weight:600;}
.nav-link.is-active::after{
  content:"";position:absolute;left:13px;right:13px;bottom:2px;height:2px;
  background:var(--c-brand-600);border-radius:2px;
}
.brand{display:flex;align-items:center;gap:10px;justify-self:center;}
.brand-mark{
  width:38px;height:38px;border-radius:12px;display:grid;place-items:center;
  background:linear-gradient(140deg,var(--c-brand-600),var(--c-brand-500));
  color:#fff;font-weight:700;font-size:14px;letter-spacing:.5px;
}
.brand-name{display:flex;align-items:baseline;font-size:19px;font-weight:700;color:var(--c-ink);}
.brand-sub{margin-left:6px;font-size:12px;font-weight:500;color:var(--c-ink-3);}
.menu-toggle{
  display:none;flex-direction:column;justify-content:center;gap:5px;
  width:44px;height:44px;border-radius:10px;border:1px solid var(--c-line);
  background:#fff;align-items:center;justify-self:end;
}
.menu-toggle span{display:block;width:18px;height:2px;background:var(--c-ink-2);border-radius:2px;transition:transform .2s ease,opacity .2s ease;}
.menu-toggle.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.menu-toggle.is-open span:nth-child(2){opacity:0;}
.menu-toggle.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}
.mobile-drawer{
  overflow:hidden;max-height:0;background:#fff;border-top:1px solid transparent;
  transition:max-height .3s ease,border-color .3s ease;
}
.mobile-drawer.is-open{max-height:340px;border-top-color:var(--c-line);box-shadow:var(--sh-md);}
.mobile-drawer ul{padding:10px 24px 18px;}
.mobile-drawer li+li{border-top:1px solid var(--c-line);}
.mobile-drawer a{display:flex;align-items:center;min-height:44px;font-size:16px;color:var(--c-ink-2);}
.mobile-drawer a.is-active{color:var(--c-brand-600);font-weight:600;}

/* ---------- 页首 ---------- */
.page-hero{
  position:relative;overflow:hidden;background:var(--c-brand-50);
  border-bottom:1px solid var(--c-line);padding:64px 0 72px;
}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;opacity:.07;
  pointer-events:none;
}
.hero-grid{
  position:relative;z-index:1;display:grid;grid-template-columns:1.15fr .85fr;
  gap:48px;align-items:center;
}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13.5px;color:var(--c-ink-3);margin-bottom:16px;}
.crumb a{color:var(--c-ink-3);}
.crumb a:hover{color:var(--c-brand-600);}
.crumb span{color:var(--c-brand-300);}
.hero-title{font-size:clamp(30px,3.4vw,40px);line-height:1.25;margin:14px 0 16px;letter-spacing:-.3px;}
.hero-lead{font-size:17px;line-height:1.85;color:var(--c-ink-2);max-width:560px;}
.hero-actions{display:flex;flex-wrap:wrap;align-items:center;gap:18px;margin-top:26px;}
.hero-stats{display:flex;flex-wrap:wrap;gap:36px;margin-top:34px;padding-top:26px;border-top:1px solid var(--c-brand-300);}
.stat{display:flex;flex-direction:column;}
.stat-num{font-size:28px;font-weight:700;color:var(--c-brand-600);line-height:1.3;font-variant-numeric:tabular-nums;}
.stat-label{font-size:13px;color:var(--c-ink-3);}
.hero-cover{position:relative;margin:0;border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--sh-md);background:var(--c-surface);}
.hero-cover img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:var(--r-lg);}
.hero-cover figcaption{
  position:absolute;left:14px;right:14px;bottom:14px;display:flex;align-items:center;justify-content:space-between;
  gap:10px;padding:10px 14px;border-radius:10px;background:rgba(18,63,102,.86);color:rgba(255,255,255,.92);
  font-size:13px;backdrop-filter:none;
}

/* ---------- 通用板块 ---------- */
.section{padding:88px 0;}
.section-tight{padding:56px 0;}
.section-surface{background:var(--c-surface);border-top:1px solid var(--c-line);border-bottom:1px solid var(--c-line);}
.section-head{max-width:720px;margin-bottom:40px;}
.section-head h2{font-size:clamp(23px,2.4vw,28px);line-height:1.35;margin-bottom:12px;}
.section-head p{font-size:16px;color:var(--c-ink-2);}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;color:var(--c-brand-600);letter-spacing:.4px;margin-bottom:12px;}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--c-brand-600);border-radius:2px;}

/* ---------- 阅读区 ---------- */
.reader{display:grid;grid-template-columns:250px minmax(0,1fr);gap:56px;align-items:start;}
.toc{
  position:sticky;top:104px;background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:var(--r-card);padding:20px 0 14px;box-shadow:var(--sh-sm);
}
.toc-title{
  padding:0 20px 12px;font-size:13px;font-weight:600;color:var(--c-ink-3);letter-spacing:.5px;
  border-bottom:1px solid var(--c-line);
}
.toc-list{margin-top:8px;}
.toc-list a{
  display:block;padding:9px 20px;font-size:14.5px;color:var(--c-ink-2);
  border-left:3px solid transparent;transition:background-color .2s ease,color .2s ease,border-color .2s ease;
}
.toc-list a:hover{background:var(--c-surface-2);color:var(--c-brand-600);}
.toc-list a.is-current{border-left-color:var(--c-brand-600);color:var(--c-brand-600);font-weight:600;background:var(--c-brand-50);}
.toc-note{margin:14px 20px 0;padding-top:14px;border-top:1px solid var(--c-line);font-size:13px;color:var(--c-ink-3);}

.chapter{padding-bottom:44px;margin-bottom:44px;border-bottom:1px solid var(--c-line);}
.chapter:last-child{border-bottom:0;margin-bottom:0;padding-bottom:0;}
.chapter-title{
  position:relative;font-size:23px;line-height:1.4;padding-left:16px;margin-bottom:10px;
}
.chapter-title::before{
  content:"";position:absolute;left:0;top:6px;bottom:6px;width:4px;border-radius:2px;background:var(--c-brand-600);
}
.chapter-lead{font-size:15.5px;color:var(--c-ink-3);padding-left:16px;margin-bottom:18px;}
.entry-list{border-top:1px solid var(--c-line);}
.entry-row{
  display:grid;grid-template-columns:56px minmax(0,1fr) auto;gap:18px;align-items:start;
  padding:20px 16px;border-bottom:1px solid var(--c-line);
  transition:background-color .2s ease,box-shadow .2s ease;
}
.entry-row:hover{background:#F6F9FC;box-shadow:inset 3px 0 0 var(--c-brand-600);}
.entry-num{
  font-size:20px;font-weight:700;color:var(--c-brand-300);line-height:1.5;font-variant-numeric:tabular-nums;
}
.entry-row:hover .entry-num{color:var(--c-brand-600);}
.entry-title{font-size:17.5px;font-weight:600;line-height:1.5;margin-bottom:6px;}
.entry-desc{font-size:15px;color:var(--c-ink-2);line-height:1.75;}
.entry-meta{display:flex;flex-direction:column;align-items:flex-end;gap:8px;}
.entry-meta time{font-size:13px;color:var(--c-ink-3);font-variant-numeric:tabular-nums;white-space:nowrap;}

/* ---------- 相关推荐 ---------- */
.rec-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.card{
  display:flex;flex-direction:column;background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:var(--r-card);box-shadow:var(--sh-sm);overflow:hidden;
  transition:box-shadow .25s ease,transform .25s ease,border-color .25s ease;
}
.card:hover{box-shadow:var(--sh-lg);transform:translateY(-2px);border-color:var(--c-brand-300);}
.card-cover{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:0;}
.card-body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:10px;flex:1;}
.card-title{font-size:18px;font-weight:600;line-height:1.45;}
.card-desc{font-size:14.5px;color:var(--c-ink-2);line-height:1.7;}
.card-foot{margin-top:auto;padding-top:12px;display:flex;align-items:center;justify-content:space-between;gap:10px;}
.card-foot .link-arrow{font-size:14px;}

/* ---------- FAQ ---------- */
.faq{border-top:1px solid var(--c-line);max-width:860px;}
.faq details{border-bottom:1px solid var(--c-line);}
.faq summary{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 4px;font-size:17px;font-weight:600;color:var(--c-ink);
  cursor:pointer;list-style:none;transition:color .2s ease;
}
.faq summary::-webkit-details-marker{display:none;}
.faq summary:hover{color:var(--c-brand-600);}
.faq summary .chev{
  flex:0 0 auto;width:22px;height:22px;border-radius:50%;border:1px solid var(--c-brand-300);
  display:grid;place-items:center;color:var(--c-brand-600);font-size:12px;
  transition:transform .25s ease,background-color .25s ease;
}
.faq details[open] summary{color:var(--c-brand-600);}
.faq details[open] summary .chev{transform:rotate(180deg);background:var(--c-brand-50);}
.faq-answer{padding:0 4px 22px;font-size:15px;line-height:1.9;color:var(--c-ink-2);max-width:760px;}

/* ---------- CTA 条 ---------- */
.cta-bar{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:24px;
  background:var(--c-brand-50);border:1px solid var(--c-brand-300);border-radius:var(--r-card);
  padding:32px 36px;box-shadow:var(--sh-sm);
}
.cta-copy h2{font-size:22px;line-height:1.45;margin-bottom:8px;}
.cta-copy p{font-size:15px;color:var(--c-ink-2);max-width:560px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;}

/* ---------- 页脚 ---------- */
.site-footer{position:relative;background:#0F2A44;color:rgba(255,255,255,.8);margin-top:0;}
.footer-top{
  display:block;height:6px;width:100%;
  background-image:url('/assets/images/backpic/back-3.webp');
  background-size:cover;background-position:center;opacity:.5;
}
.footer-grid{
  display:grid;grid-template-columns:1.4fr 1fr 1fr 1.1fr;gap:40px;padding:60px 0 40px;
}
.footer-brand .brand{margin-bottom:16px;}
.footer-brand .brand-name{color:#fff;}
.footer-brand .brand-sub{color:rgba(255,255,255,.6);}
.footer-brand p{font-size:14.5px;line-height:1.85;color:rgba(255,255,255,.72);max-width:340px;}
.footer-title{font-size:15px;color:#fff;font-weight:600;margin-bottom:16px;}
.footer-list li{margin-bottom:10px;font-size:14.5px;color:rgba(255,255,255,.72);}
.footer-list a{color:rgba(255,255,255,.72);transition:color .2s ease;}
.footer-list a:hover{color:#fff;text-decoration:underline;text-underline-offset:4px;}
.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px;
  padding:20px 0 28px;border-top:1px solid rgba(255,255,255,.14);
  font-size:13.5px;color:rgba(255,255,255,.62);
}
.to-top{display:inline-flex;align-items:center;gap:6px;color:rgba(255,255,255,.78);transition:color .2s ease;}
.to-top:hover{color:#fff;}
.to-top span{transition:transform .2s ease;}
.to-top:hover span{transform:translateY(-3px);}

/* ---------- Toast ---------- */
.toast{
  position:fixed;right:24px;bottom:24px;z-index:100;
  display:flex;align-items:center;gap:10px;padding:12px 18px 12px 16px;
  background:#fff;border:1px solid var(--c-line);border-left:4px solid var(--c-brand-600);
  border-radius:10px;box-shadow:var(--sh-lg);font-size:14.5px;color:var(--c-ink);
  opacity:0;transform:translateY(10px);pointer-events:none;
  transition:opacity .25s ease,transform .25s ease;
}
.toast.is-show{opacity:1;transform:translateY(0);}
.toast .toast-dot{width:8px;height:8px;border-radius:50%;background:var(--c-accent);}

/* ---------- 响应式 ---------- */
@media (max-width:1023px){
  .container{padding:0 20px;}
  .section{padding:64px 0;}
  .hero-grid{grid-template-columns:1fr;gap:32px;}
  .hero-cover{order:-1;}
  .reader{grid-template-columns:1fr;gap:32px;}
  .toc{
    position:static;top:auto;padding:14px 0 10px;
  }
  .toc-title{padding:0 18px 10px;}
  .toc-list{display:flex;gap:8px;overflow-x:auto;padding:8px 18px 4px;margin-top:0;scrollbar-width:thin;}
  .toc-list li{flex:0 0 auto;}
  .toc-list a{
    border-left:0;border-bottom:3px solid transparent;border-radius:8px;white-space:nowrap;
    padding:8px 14px;background:var(--c-surface-2);
  }
  .toc-list a.is-current{border-left:0;border-bottom-color:var(--c-brand-600);background:var(--c-brand-50);}
  .toc-note{display:none;}
  .rec-grid{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;padding:48px 0 32px;}
}

@media (max-width:899px){
  .header-inner{grid-template-columns:1fr auto;height:64px;}
  .site-header.is-scrolled .header-inner{height:60px;}
  .nav-left,.nav-right{display:none;}
  .brand{justify-self:start;}
  .menu-toggle{display:inline-flex;}
}

@media (max-width:767px){
  body{font-size:15.5px;}
  .container{padding:0 16px;}
  .section{padding:48px 0;}
  .page-hero{padding:44px 0 52px;}
  .hero-lead{font-size:16px;}
  .hero-stats{gap:24px;}
  .stat-num{font-size:24px;}
  .entry-row{grid-template-columns:40px minmax(0,1fr);gap:12px;padding:18px 10px;}
  .entry-meta{grid-column:2;flex-direction:row;align-items:center;gap:10px;margin-top:2px;}
  .entry-num{font-size:17px;}
  .entry-title{font-size:16.5px;}
  .rec-grid{grid-template-columns:1fr;}
  .cta-bar{padding:24px 20px;}
  .cta-actions{width:100%;}
  .cta-actions .btn{flex:1 1 auto;}
  .footer-grid{grid-template-columns:1fr;padding:40px 0 24px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .toast{left:16px;right:16px;bottom:16px;}
}

@media (max-width:479px){
  .brand-name{font-size:17px;}
  .brand-sub{display:none;}
  .hero-title{font-size:26px;}
  .hero-actions .btn{width:100%;}
  .chapter-title{font-size:20px;}
  .card-body{padding:16px 16px 18px;}
}