/* roulang page: index */
:root{
  --brand:#1E5EDB;
  --brand-deep:#123C93;
  --brand-mist:#E8F0FE;
  --brand-tint:#F5F8FE;
  --amber:#F0A028;
  --ink:#0F1B2D;
  --text:#44526A;
  --muted:#94A3B8;
  --line:#E3E9F2;
  --bg:#FFFFFF;
  --bg-soft:#F7F9FD;
  --r-lg:18px;
  --r-md:14px;
  --r-img:16px;
  --r-btn:10px;
  --sh-1:0 1px 2px rgba(15,27,45,.04),0 1px 3px rgba(15,27,45,.06);
  --sh-2:0 10px 30px -12px rgba(20,50,120,.18);
  --sh-3:0 18px 42px -16px rgba(20,50,120,.28);
  --sec-y:96px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC","Helvetica Neue",Arial,sans-serif;
  font-size:16px;
  line-height:1.85;
  letter-spacing:0;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{margin:0;color:var(--ink);font-weight:700;line-height:1.3}
p{margin:0}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%;height:auto}
button{font:inherit;cursor:pointer}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px}
.container{width:100%;max-width:1260px;margin:0 auto;padding:0 32px}
.section{padding:var(--sec-y) 0}
.section--soft{background:var(--bg-soft)}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:36px}
.section-head h2{font-size:clamp(24px,2.6vw,32px);letter-spacing:-.01em}
.section-head .sub{margin-top:10px;font-size:15px;color:var(--muted);line-height:1.7}
.textlink{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--brand);white-space:nowrap;transition:color .2s}
.textlink:hover{color:var(--brand-deep);text-decoration:underline;text-underline-offset:4px}

/* ---------- header ---------- */
.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 var(--line);
  transition:box-shadow .25s ease;
}
.site-header.is-scrolled{box-shadow:0 6px 24px -14px rgba(20,50,120,.28)}
.nav-inner{display:flex;align-items:center;gap:28px;height:72px}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{
  width:34px;height:34px;border-radius:10px;
  background:linear-gradient(135deg,var(--brand) 0%,var(--brand-deep) 100%);
  color:#fff;display:flex;align-items:center;justify-content:center;
  font-size:14px;font-weight:700;letter-spacing:.02em;
  box-shadow:0 6px 16px -8px rgba(30,94,219,.55);
}
.brand-text{font-size:16px;font-weight:700;color:var(--ink);letter-spacing:-.01em;white-space:nowrap}
.brand-text span{color:var(--brand)}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:4px}
.nav-links a{
  position:relative;display:inline-flex;align-items:center;height:40px;padding:0 14px;
  font-size:14px;font-weight:500;color:var(--text);border-radius:8px;transition:color .2s,background .2s;
}
.nav-links a:hover{color:var(--brand);background:var(--brand-tint)}
.nav-links a.active{color:var(--brand);font-weight:600}
.nav-links a.active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;border-radius:2px;background:var(--brand);
}
.nav-right{display:flex;align-items:center;gap:12px;margin-left:auto}
.command-search{
  display:flex;align-items:center;gap:8px;
  width:250px;height:40px;padding:0 12px;
  background:var(--brand-tint);border:1px solid transparent;border-radius:var(--r-btn);
  transition:border-color .2s,background .2s,box-shadow .2s;
}
.command-search:focus-within{border-color:var(--brand);background:#fff;box-shadow:0 0 0 3px rgba(30,94,219,.10)}
.command-search svg{flex-shrink:0;color:var(--muted)}
.command-search input{flex:1;min-width:0;border:0;background:transparent;outline:none;font-size:14px;color:var(--ink)}
.command-search input::placeholder{color:var(--muted)}
.kbd{font-size:11px;color:var(--muted);border:1px solid var(--line);border-radius:6px;padding:1px 6px;background:#fff;line-height:1.6}
.icon-btn{
  width:40px;height:40px;display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--line);border-radius:var(--r-btn);background:#fff;color:var(--text);
  transition:border-color .2s,color .2s,background .2s;
}
.icon-btn:hover{border-color:var(--brand);color:var(--brand);background:var(--brand-tint)}
.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;white-space:nowrap;
  transition:background .2s,border-color .2s,color .2s,transform .15s,box-shadow .2s;
}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 8px 20px -12px rgba(30,94,219,.75)}
.btn-primary:hover{background:#1a53c4;box-shadow:0 12px 26px -12px rgba(30,94,219,.85)}
.btn-primary:active{transform:translateY(1px)}
.btn-outline{background:#fff;border-color:var(--brand);color:var(--brand)}
.btn-outline:hover{background:var(--brand-mist);color:var(--brand-deep)}
.btn-outline:active{transform:translateY(1px)}
.btn-ghost{background:transparent;color:var(--brand);padding:0 4px;height:auto}
.btn-ghost:hover{color:var(--brand-deep);text-decoration:underline;text-underline-offset:4px}
.burger{display:none}

/* mobile drawer */
.drawer{
  position:fixed;inset:72px 0 0 0;z-index:55;background:#fff;
  transform:translateY(-8px);opacity:0;visibility:hidden;
  transition:opacity .22s ease,transform .22s ease,visibility .22s;
  overflow-y:auto;padding:12px 20px 48px;
}
.drawer.open{opacity:1;visibility:visible;transform:translateY(0)}
.drawer a{
  display:flex;align-items:center;justify-content:space-between;
  padding:20px 4px;font-size:18px;font-weight:600;color:var(--ink);
  border-bottom:1px solid var(--line);
}
.drawer a:last-child{border-bottom:0}
.drawer .drawer-cta{margin-top:20px;justify-content:center;border:0}

/* ---------- hero ---------- */
.hero{
  position:relative;overflow:hidden;
  background:linear-gradient(180deg,#EAF2FF 0%,#F5F8FE 52%,#FFFFFF 100%);
  padding:76px 0 84px;
}
.hero::after{
  content:"";position:absolute;right:-160px;top:-140px;width:520px;height:520px;border-radius:50%;
  background:radial-gradient(circle,rgba(30,94,219,.14) 0%,rgba(30,94,219,0) 68%);
  pointer-events:none;
}
.hero-grid{position:relative;display:grid;grid-template-columns:1.02fr .98fr;gap:56px;align-items:center}
.badge-row{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:22px}
.badge{
  display:inline-flex;align-items:center;gap:6px;height:24px;padding:0 12px;border-radius:999px;
  font-size:12px;font-weight:600;line-height:1;
}
.badge-brand{background:var(--brand-mist);color:var(--brand-deep)}
.badge-amber{background:#FDF3E3;color:#A9700F}
.badge-line{background:#fff;border:1px solid var(--line);color:var(--text)}
.hero h1{
  font-size:clamp(32px,4.4vw,54px);line-height:1.15;font-weight:700;letter-spacing:-.02em;
  margin-bottom:20px;
}
.hero h1 em{font-style:normal;color:var(--brand)}
.hero-lead{font-size:17px;line-height:1.85;color:var(--text);max-width:560px;margin-bottom:30px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:30px}
.trust-row{display:flex;flex-wrap:wrap;gap:12px 26px}
.trust-row li{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--text)}
.trust-row svg{color:var(--brand);flex-shrink:0}
.hero-visual{position:relative}
.hero-visual img{
  width:100%;aspect-ratio:16/9;object-fit:cover;
  border-radius:20px;box-shadow:var(--sh-2);background:#EEF3FB;
}
.hero-float{
  position:absolute;left:-18px;bottom:-22px;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
  box-shadow:var(--sh-3);padding:14px 18px;display:flex;align-items:center;gap:12px;
}
.hero-float .dot{width:10px;height:10px;border-radius:50%;background:#2FB37A;box-shadow:0 0 0 4px rgba(47,179,122,.15)}
.hero-float strong{display:block;font-size:14px;color:var(--ink);line-height:1.5}
.hero-float span{font-size:12px;color:var(--muted)}

/* ---------- shelf ---------- */
.shelf-wrap{position:relative}
.shelf-wrap::before,.shelf-wrap::after{
  content:"";position:absolute;top:0;bottom:14px;width:64px;z-index:2;pointer-events:none;
}
.shelf-wrap::before{left:-4px;background:linear-gradient(90deg,#fff 0%,rgba(255,255,255,0) 100%)}
.shelf-wrap::after{right:-4px;background:linear-gradient(270deg,#fff 0%,rgba(255,255,255,0) 100%)}
.section--soft .shelf-wrap::before{background:linear-gradient(90deg,#F7F9FD 0%,rgba(247,249,253,0) 100%)}
.section--soft .shelf-wrap::after{background:linear-gradient(270deg,#F7F9FD 0%,rgba(247,249,253,0) 100%)}
.shelf{
  display:flex;gap:22px;overflow-x:auto;scroll-snap-type:x mandatory;
  padding:6px 4px 22px;scrollbar-width:thin;
}
.shelf::-webkit-scrollbar{height:6px}
.shelf::-webkit-scrollbar-thumb{background:#D8E3F6;border-radius:999px}
.shelf::-webkit-scrollbar-track{background:transparent}
.shelf-card{
  flex:0 0 23.5%;min-width:250px;scroll-snap-align:start;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
  box-shadow:var(--sh-1);overflow:hidden;display:flex;flex-direction:column;
  transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
}
.shelf-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:#D5E2F8}
.shelf-card:hover .shelf-thumb img{transform:scale(1.03)}
.shelf-thumb{position:relative;overflow:hidden;background:#EEF3FB}
.shelf-thumb img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .4s ease}
.shelf-thumb .badge{position:absolute;left:12px;top:12px}
.shelf-body{padding:18px 20px 20px;display:flex;flex-direction:column;gap:8px;flex:1}
.shelf-body h3{font-size:17px;font-weight:600;line-height:1.45}
.shelf-body p{font-size:14px;color:var(--text);line-height:1.7}
.shelf-foot{
  margin-top:auto;padding-top:12px;display:flex;align-items:center;justify-content:space-between;
  font-size:13px;color:var(--muted);
}
.shelf-foot .arrow{color:var(--brand);transition:transform .2s}
.shelf-card:hover .shelf-foot .arrow{transform:translateX(4px)}
.shelf-nav{
  position:absolute;top:38%;width:42px;height:42px;border-radius:50%;
  background:#fff;border:1px solid var(--line);box-shadow:var(--sh-2);color:var(--text);
  display:flex;align-items:center;justify-content:center;z-index:3;
  opacity:0;transition:opacity .25s,color .2s,border-color .2s;
}
.shelf-wrap:hover .shelf-nav{opacity:1}
.shelf-nav:hover{color:var(--brand);border-color:var(--brand)}
.shelf-nav.prev{left:-18px}
.shelf-nav.next{right:-18px}

/* ---------- news ---------- */
.filter-row{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:28px}
.chip{
  height:34px;padding:0 16px;border-radius:999px;border:1px solid var(--line);background:#fff;
  font-size:13px;font-weight:500;color:var(--text);display:inline-flex;align-items:center;
  transition:border-color .2s,color .2s,background .2s;
}
.chip:hover{border-color:var(--brand);color:var(--brand)}
.chip.is-active{background:var(--brand-mist);border-color:#C9DCFB;color:var(--brand-deep);font-weight:600}
.news-hero{
  display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,1.25fr);gap:28px;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:var(--sh-1);overflow:hidden;margin-bottom:22px;
  transition:transform .25s ease,box-shadow .25s ease;
}
.news-hero:hover{transform:translateY(-4px);box-shadow:var(--sh-2)}
.news-hero .thumb{overflow:hidden;background:#EEF3FB}
.news-hero .thumb img{width:100%;height:100%;min-height:250px;object-fit:cover;transition:transform .4s}
.news-hero:hover .thumb img{transform:scale(1.03)}
.news-hero .body{padding:30px 32px;display:flex;flex-direction:column;gap:14px}
.news-hero h3{font-size:22px;font-weight:700;line-height:1.45}
.news-hero p{font-size:15px;color:var(--text);line-height:1.8;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.meta-row{display:flex;align-items:center;gap:12px;flex-wrap:wrap;font-size:13px;color:var(--muted)}
.news-list{border-top:1px solid var(--line)}
.news-row{
  display:flex;align-items:center;gap:20px;padding:20px 4px;border-bottom:1px solid var(--line);
  transition:background .2s,padding .2s;
}
.news-row:hover{background:var(--brand-tint);padding-left:14px;padding-right:14px}
.news-row .idx{
  flex-shrink:0;width:34px;height:34px;border-radius:10px;background:var(--brand-tint);color:var(--brand);
  display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:700;
}
.news-row .txt{flex:1;min-width:0}
.news-row h3{font-size:16px;font-weight:600;line-height:1.5;margin-bottom:4px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.news-row p{font-size:13.5px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.news-row .side{flex-shrink:0;display:flex;align-items:center;gap:14px;font-size:13px;color:var(--muted)}
.news-row .side .arrow{color:var(--brand);transition:transform .2s}
.news-row:hover .side .arrow{transform:translateX(4px)}
.news-empty{
  border:1px dashed #D5E2F8;border-radius:var(--r-lg);background:var(--brand-tint);
  padding:52px 24px;text-align:center;
}
.news-empty svg{color:#B7CDF2;margin:0 auto 14px}
.news-empty p{font-size:14px;color:var(--text);margin-bottom:16px}

/* ---------- recommend ---------- */
.rec-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));grid-auto-rows:1fr;gap:22px}
.rec-card{
  position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
  box-shadow:var(--sh-1);overflow:hidden;display:flex;flex-direction:column;
  transition:transform .25s,box-shadow .25s,border-color .25s;
}
.rec-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:#D5E2F8}
.rec-card .thumb{overflow:hidden;background:#EEF3FB}
.rec-card .thumb img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .4s}
.rec-card:hover .thumb img{transform:scale(1.03)}
.rec-card .body{padding:18px 20px 20px;display:flex;flex-direction:column;gap:8px;flex:1}
.rec-card h3{font-size:16px;font-weight:600;line-height:1.5}
.rec-card p{font-size:13.5px;color:var(--muted);line-height:1.7}
.rec-big{grid-column:span 2;grid-row:span 2}
.rec-big .thumb{position:relative;flex:1;min-height:250px}
.rec-big .thumb img{height:100%;aspect-ratio:auto;min-height:250px}
.rec-big .body{padding:24px 26px}
.rec-big h3{font-size:21px}
.rec-big p{font-size:14.5px;color:var(--text)}
.rec-rank{
  position:absolute;left:16px;top:16px;height:26px;padding:0 12px;border-radius:999px;
  background:var(--amber);color:#fff;font-size:12px;font-weight:700;display:inline-flex;align-items:center;gap:6px;
  box-shadow:0 8px 18px -10px rgba(240,160,40,.9);
}
.rec-tag{
  position:absolute;right:16px;top:16px;height:24px;padding:0 11px;border-radius:999px;
  background:rgba(255,255,255,.92);color:var(--brand-deep);font-size:12px;font-weight:600;display:inline-flex;align-items:center;
}

/* ---------- topic blocks ---------- */
.topic-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.topic-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-md);box-shadow:var(--sh-1);
  overflow:hidden;display:flex;flex-direction:column;
  transition:transform .25s,box-shadow .25s,border-color .25s;
}
.topic-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:#D5E2F8}
.topic-card .thumb{overflow:hidden;background:#EEF3FB}
.topic-card .thumb img{width:100%;aspect-ratio:4/3;object-fit:cover;transition:transform .4s}
.topic-card:hover .thumb img{transform:scale(1.03)}
.topic-card .body{padding:22px 22px 24px;display:flex;flex-direction:column;gap:10px;flex:1}
.topic-card h3{font-size:18px;font-weight:600;line-height:1.5}
.topic-card p{font-size:14px;color:var(--text);line-height:1.78}
.topic-card .mini{font-size:12.5px;color:var(--muted)}
.split-row{
  display:grid;grid-template-columns:minmax(0,.92fr) minmax(0,1.08fr);gap:36px;align-items:center;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--sh-1);
  padding:28px;margin-top:26px;
}
.split-row img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:var(--r-img);background:#EEF3FB}
.split-row h3{font-size:22px;margin-bottom:14px;line-height:1.4}
.split-row p{font-size:15px;line-height:1.85;margin-bottom:16px}
.check-list{display:flex;flex-direction:column;gap:12px;margin-bottom:22px}
.check-list li{display:flex;gap:12px;font-size:14.5px;color:var(--text);line-height:1.7}
.check-list svg{flex-shrink:0;margin-top:5px;color:var(--brand)}

/* ---------- proof ---------- */
.proof-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:22px}
.proof-item{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-md);padding:26px 24px;
  box-shadow:var(--sh-1);transition:transform .25s,box-shadow .25s;
}
.proof-item:hover{transform:translateY(-4px);box-shadow:var(--sh-2)}
.proof-item .num{font-size:30px;font-weight:700;color:var(--brand);letter-spacing:-.02em;line-height:1.2}
.proof-item h3{font-size:16px;font-weight:600;margin:10px 0 8px}
.proof-item p{font-size:13.5px;color:var(--muted);line-height:1.75}

/* ---------- faq ---------- */
.faq-wrap{max-width:860px;margin:0 auto;display:flex;flex-direction:column;gap:14px}
.faq-item{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
  box-shadow:var(--sh-1);overflow:hidden;transition:box-shadow .25s,border-color .25s;
}
.faq-item[open]{box-shadow:var(--sh-2);border-color:#D5E2F8}
.faq-item summary{
  position:relative;list-style:none;cursor:pointer;
  padding:20px 56px 20px 22px;font-size:16.5px;font-weight:600;color:var(--ink);
  border-left:3px solid transparent;transition:border-color .2s,color .2s,background .2s;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--brand);background:var(--brand-tint)}
.faq-item[open] summary{border-left-color:var(--brand);color:var(--brand-deep)}
.faq-item summary::after{
  content:"";position:absolute;right:24px;top:50%;width:10px;height:10px;
  border-right:2px solid var(--muted);border-bottom:2px solid var(--muted);
  transform:translateY(-70%) rotate(45deg);transition:transform .2s,border-color .2s;
}
.faq-item[open] summary::after{transform:translateY(-30%) rotate(-135deg);border-color:var(--brand)}
.faq-body{padding:0 24px 22px 22px;font-size:15px;line-height:1.85;color:var(--text)}
.faq-body p+p{margin-top:10px}

/* ---------- cta ---------- */
.cta-band{
  display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;
  background:linear-gradient(120deg,#EAF2FF 0%,#F5F8FE 62%,#FFFFFF 100%);
  border:1px solid #DCE8FB;border-radius:var(--r-lg);padding:44px 46px;
  box-shadow:var(--sh-1);
}
.cta-band h2{font-size:clamp(22px,2.4vw,30px);margin-bottom:12px}
.cta-band p{font-size:15px;color:var(--text);max-width:620px}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap}

/* ---------- footer ---------- */
.site-footer{background:var(--bg-soft);border-top:1px solid var(--line);padding:64px 0 0;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.1fr;gap:40px;padding-bottom:44px}
.footer-grid h3{font-size:14px;font-weight:700;color:var(--ink);margin-bottom:18px;letter-spacing:.01em}
.footer-grid p{font-size:13.5px;color:var(--text);line-height:1.85}
.footer-grid li+li{margin-top:11px}
.footer-grid a{font-size:13.5px;color:var(--text);transition:color .2s}
.footer-grid a:hover{color:var(--brand);text-decoration:underline;text-underline-offset:4px}
.footer-brandline{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-bottom{
  border-top:1px solid var(--line);padding:22px 0;display:flex;align-items:center;
  justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13px;color:var(--muted);
}
.footer-bottom a{color:var(--muted)}
.footer-bottom a:hover{color:var(--brand)}

@media (max-width:1180px){
  .shelf-card{flex:0 0 31.5%}
  .command-search{width:200px}
}
@media (max-width:1024px){
  :root{--sec-y:72px}
  .nav-links{display:none}
  .command-search{display:none}
  .burger{display:inline-flex}
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .hero{padding:52px 0 64px}
  .hero-float{position:static;margin-top:16px;left:auto;bottom:auto;box-shadow:var(--sh-1)}
  .news-hero{grid-template-columns:1fr}
  .news-hero .thumb img{min-height:220px}
  .rec-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .rec-big{grid-column:span 2;grid-row:auto}
  .rec-big .thumb{min-height:220px}
  .rec-big .thumb img{min-height:220px}
  .topic-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .split-row{grid-template-columns:1fr;gap:24px}
  .proof-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .shelf-card{flex:0 0 45%}
}
@media (max-width:768px){
  .container{padding:0 20px}
  .shelf-nav{display:none}
  .section-head{flex-direction:column;align-items:flex-start;gap:12px;margin-bottom:26px}
  .shelf-card{flex:0 0 68%}
  .topic-grid{grid-template-columns:1fr}
  .rec-grid{grid-template-columns:1fr}
  .rec-big{grid-column:span 1}
  .cta-band{padding:32px 24px}
  .news-hero .body{padding:24px 22px}
  .split-row{padding:22px}
}
@media (max-width:520px){
  :root{--sec-y:56px}
  .container{padding:0 16px}
  .brand-text{font-size:15px}
  .hero h1{font-size:30px}
  .hero-lead{font-size:15.5px}
  .hero-actions .btn{width:100%}
  .shelf-card{flex:0 0 84%}
  .proof-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:8px}
  .footer-col{border-bottom:1px solid var(--line);padding-bottom:14px}
  .footer-col:last-child{border-bottom:0}
  .footer-col h3{margin-bottom:12px;cursor:pointer}
  .news-row{flex-wrap:wrap;gap:12px}
  .news-row .txt{flex:1 1 100%}
  .news-row h3,.news-row p{white-space:normal}
  .cta-actions{width:100%}
  .cta-actions .btn{width:100%}
}

/* roulang page: article */
:root{
  --brand:#1E5EDB;
  --brand-deep:#123C93;
  --brand-mist:#E8F0FE;
  --bg-soft:#F5F8FE;
  --amber:#F0A028;
  --ink:#0F1B2D;
  --text:#44526A;
  --muted:#94A3B8;
  --line:#E3E9F2;
  --surface:#FFFFFF;
  --footer-bg:#F7F9FD;
  --danger:#D9534F;
  --r-lg:18px;
  --r-md:14px;
  --r-img:16px;
  --r-btn:10px;
  --sh-1:0 1px 2px rgba(15,27,45,.04),0 1px 3px rgba(15,27,45,.06);
  --sh-2:0 10px 30px -12px rgba(20,50,120,.18);
  --sh-3:0 18px 42px -16px rgba(20,50,120,.28);
  --w:1240px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC","Helvetica Neue",Arial,sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--text);
  background:var(--surface);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button,input{font:inherit;color:inherit}
button{background:none;border:0}
h1,h2,h3,h4{margin:0;color:var(--ink);letter-spacing:-.01em}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px}
::selection{background:var(--brand-mist);color:var(--brand-deep)}

.container{width:100%;max-width:var(--w);margin:0 auto;padding:0 32px}
@media (max-width:768px){.container{padding:0 16px}}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(255,255,255,.96);
  -webkit-backdrop-filter:saturate(180%) blur(12px);
  backdrop-filter:saturate(180%) blur(12px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .25s ease;
}
.site-header.scrolled{box-shadow:var(--sh-2)}
.nav-inner{display:flex;align-items:center;gap:20px;height:72px}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{
  display:inline-flex;align-items:center;justify-content:center;
  width:38px;height:38px;border-radius:11px;
  background:linear-gradient(135deg,var(--brand),var(--brand-deep));
  color:#fff;font-size:12.5px;font-weight:700;letter-spacing:.03em;
}
.brand-text{display:flex;flex-direction:column;line-height:1.1;font-size:16.5px;font-weight:700;color:var(--ink)}
.brand-text span{font-size:11.5px;font-weight:500;color:var(--muted);letter-spacing:0;margin-top:2px}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:6px}
.nav-links a{
  position:relative;display:inline-block;padding:8px 12px;border-radius:8px;
  font-size:14px;font-weight:500;color:var(--text);
  transition:color .2s ease,background .2s ease;
}
.nav-links a:hover{color:var(--brand);background:var(--bg-soft)}
.nav-links a.active{color:var(--brand)}
.nav-links a.active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:-1px;height:2px;
  border-radius:2px;background:var(--brand);
}
.nav-right{display:flex;align-items:center;gap:10px;margin-left:auto}
.command-search{
  display:flex;align-items:center;gap:8px;height:40px;min-width:230px;
  padding:0 10px 0 12px;border-radius:10px;background:var(--bg-soft);
  border:1px solid transparent;color:var(--muted);
  transition:border-color .2s ease,background .2s ease,box-shadow .2s ease;
}
.command-search:focus-within{border-color:var(--brand);background:#fff;box-shadow:0 0 0 3px rgba(30,94,219,.1)}
.command-search input{border:0;background:transparent;outline:none;width:100%;font-size:14px;color:var(--ink);min-width:0}
.command-search input::placeholder{color:var(--muted)}
.kbd{font-size:11px;padding:2px 6px;border-radius:6px;background:#fff;border:1px solid var(--line);color:var(--muted);white-space:nowrap}
.icon-btn{
  display:inline-flex;align-items:center;justify-content:center;
  width:40px;height:40px;border-radius:10px;color:var(--text);
  border:1px solid var(--line);background:#fff;cursor:pointer;
  transition:color .2s ease,border-color .2s ease,background .2s ease,transform .12s ease;
}
.icon-btn:hover{color:var(--brand);border-color:rgba(30,94,219,.35);background:var(--bg-soft)}
.icon-btn:active{transform:translateY(1px)}
.burger{display:none}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 22px;border-radius:var(--r-btn);border:1px solid transparent;
  font-size:14px;font-weight:600;line-height:1;cursor:pointer;
  transition:background .2s ease,color .2s ease,border-color .2s ease,box-shadow .2s ease,transform .12s ease;
}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 8px 20px -10px rgba(30,94,219,.75)}
.btn-primary:hover{background:var(--brand-deep)}
.btn-primary:active{transform:translateY(1px)}
.btn-outline{background:#fff;color:var(--brand);border-color:rgba(30,94,219,.35)}
.btn-outline:hover{background:var(--brand-mist);border-color:var(--brand)}
.btn-outline:active{transform:translateY(1px)}
.btn-sm{padding:9px 16px;font-size:13px;border-radius:9px}
.btn-text{
  display:inline-flex;align-items:center;gap:6px;color:var(--brand);
  font-size:14px;font-weight:600;padding:4px 0;
}
.btn-text:hover{color:var(--brand-deep);text-decoration:underline;text-underline-offset:4px}
.btn-text svg{transition:transform .2s ease}
.btn-text:hover svg{transform:translateX(3px)}

/* ---------- Badges ---------- */
.badge{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:999px;
  font-size:12px;font-weight:600;letter-spacing:.01em;white-space:nowrap;
}
.badge-brand{background:var(--brand-mist);color:var(--brand-deep)}
.badge-amber{background:rgba(240,160,40,.14);color:#A96A08}
.badge-line{background:#fff;border:1px solid var(--line);color:var(--text)}

/* ---------- Article shell ---------- */
.article-main{padding:22px 0 0}
.breadcrumb{
  display:flex;align-items:center;gap:8px;font-size:13px;color:var(--muted);
  overflow:hidden;white-space:nowrap;padding:6px 0 18px;
}
.breadcrumb a{color:var(--text);transition:color .2s ease}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb .sep{color:#C7D2E2}
.breadcrumb .current{color:var(--muted);overflow:hidden;text-overflow:ellipsis;max-width:56ch}

.article-shell{max-width:836px;margin:0 auto}

.article-head{padding:8px 0 26px}
.badge-row{display:flex;align-items:center;gap:8px;margin-bottom:16px;flex-wrap:wrap}
.article-head h1{
  font-size:clamp(28px,3.6vw,42px);line-height:1.24;font-weight:700;letter-spacing:-.02em;
  color:var(--ink);margin-bottom:18px;
}
.meta-row{display:flex;align-items:center;gap:10px;flex-wrap:wrap;font-size:13.5px;color:var(--muted)}
.meta-row .dot{width:4px;height:4px;border-radius:50%;background:#CBD5E1}
.head-rule{height:1px;background:var(--line);margin-top:24px}

/* ---------- Article body ---------- */
.article-body{font-size:16.5px;line-height:1.92;color:var(--text);padding-bottom:8px}
.article-body p{margin:0 0 1.25em}
.article-body h2{
  position:relative;font-size:clamp(21px,2.4vw,27px);font-weight:700;color:var(--ink);
  line-height:1.45;margin:2.3em 0 .85em;padding-left:16px;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.28em;bottom:.28em;width:3px;
  border-radius:3px;background:var(--brand);
}
.article-body h3{font-size:19.5px;font-weight:600;color:var(--ink);margin:1.9em 0 .65em;line-height:1.5}
.article-body h4{font-size:17px;font-weight:600;color:var(--ink);margin:1.6em 0 .5em}
.article-body a{color:var(--brand);border-bottom:1px solid rgba(30,94,219,.32);transition:color .2s ease,border-color .2s ease}
.article-body a:hover{color:var(--brand-deep);border-color:var(--brand-deep)}
.article-body strong{color:var(--ink);font-weight:600}
.article-body img{
  width:100%;height:auto;border-radius:14px;margin:1.7em auto;background:#EEF3FB;
}
.article-body figure{margin:1.7em 0}
.article-body figcaption{
  text-align:center;font-size:13.5px;color:var(--muted);margin-top:-1.1em;margin-bottom:1.4em;
}
.article-body blockquote{
  margin:1.7em 0;padding:16px 22px;background:var(--brand-mist);
  border-left:3px solid var(--brand);border-radius:0 12px 12px 0;color:#31415C;
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body ul,.article-body ol{margin:0 0 1.3em;padding-left:1.3em}
.article-body ul li{list-style:disc;margin:.5em 0}
.article-body ol li{list-style:decimal;margin:.5em 0}
.article-body li::marker{color:var(--brand);font-weight:600}
.article-body hr{border:0;height:1px;background:var(--line);margin:2.4em 0}
.article-body table{
  width:100%;border-collapse:collapse;display:block;overflow-x:auto;
  margin:1.7em 0;font-size:15px;
}
.article-body th,.article-body td{
  border:1px solid var(--line);padding:10px 14px;text-align:left;white-space:nowrap;
}
.article-body th{background:var(--bg-soft);color:var(--ink);font-weight:600}
.article-body code{background:var(--bg-soft);padding:2px 6px;border-radius:6px;font-size:.92em;color:var(--brand-deep)}

/* ---------- Empty state ---------- */
.empty-state{
  display:flex;flex-direction:column;align-items:center;gap:14px;
  padding:64px 24px;border:1px dashed var(--line);border-radius:var(--r-lg);
  background:var(--footer-bg);text-align:center;
}
.empty-icon{
  width:56px;height:56px;border-radius:16px;display:flex;align-items:center;justify-content:center;
  background:#fff;border:1px solid var(--line);color:var(--brand);
}
.empty-state p{font-size:15px;color:var(--text)}

/* ---------- Article foot ---------- */
.article-foot{padding:44px 0 0;margin-top:52px;border-top:1px solid var(--line)}
.article-foot .back-row{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap}
.article-foot .tip{font-size:13.5px;color:var(--muted)}

/* ---------- Related ---------- */
.related{padding:64px 0 0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:26px}
.section-head h2{font-size:clamp(20px,2.2vw,26px);font-weight:700;line-height:1.35}
.section-head .sub{font-size:14px;color:var(--muted);margin-top:6px}
.related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.related-card{
  display:block;background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
  overflow:hidden;box-shadow:var(--sh-1);
  transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
}
.related-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:#D8E3F5}
.related-cover{position:relative;aspect-ratio:16/9;background:#EEF3FB;overflow:hidden}
.related-cover img{width:100%;height:100%;object-fit:cover;transition:transform .45s ease}
.related-card:hover .related-cover img{transform:scale(1.03)}
.related-body{padding:18px 20px 20px}
.related-body .tag{
  display:inline-flex;height:22px;padding:0 9px;border-radius:999px;background:var(--brand-mist);
  color:var(--brand-deep);font-size:11.5px;font-weight:600;align-items:center;margin-bottom:10px;
}
.related-body h3{font-size:17px;font-weight:600;line-height:1.55;color:var(--ink);margin-bottom:10px}
.related-body .time{font-size:12.5px;color:var(--muted)}

/* ---------- CTA ---------- */
.cta-band{padding:72px 0 88px}
.cta-inner{
  display:flex;align-items:center;justify-content:space-between;gap:28px;
  background:linear-gradient(120deg,#EEF4FF 0%,#F7FAFF 62%,#EAF1FE 100%);
  border:1px solid #DCE7FA;border-radius:22px;padding:38px 42px;flex-wrap:wrap;
}
.cta-inner h2{font-size:clamp(21px,2.3vw,28px);font-weight:700;line-height:1.4;margin-bottom:10px}
.cta-inner p{font-size:14.5px;color:var(--text);max-width:52ch}
.cta-actions{display:flex;align-items:center;gap:14px;flex-wrap:wrap}

/* ---------- Footer ---------- */
.site-footer{background:var(--footer-bg);border-top:1px solid var(--line);padding:64px 0 0;margin-top:8px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.1fr;gap:40px;padding-bottom:44px}
.footer-brandline{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-col h3{font-size:14px;font-weight:600;color:var(--ink);margin-bottom:16px;letter-spacing:0}
.footer-col p{font-size:13.5px;line-height:1.85;color:var(--text);max-width:36ch}
.footer-col ul li{margin-bottom:11px}
.footer-col ul a,.footer-col ul span{font-size:13.5px;color:var(--text);transition:color .2s ease}
.footer-col ul a:hover{color:var(--brand)}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;
  border-top:1px solid var(--line);padding:20px 0 26px;font-size:12.5px;color:var(--muted);
}
.footer-bottom a{color:var(--muted)}
.footer-bottom a:hover{color:var(--brand)}

/* ---------- Responsive ---------- */
@media (max-width:1024px){
  .nav-inner{gap:14px}
  .nav-links{position:fixed;left:0;right:0;top:72px;bottom:0;margin:0;padding:14px 20px 48px;
    background:#fff;border-top:1px solid var(--line);flex-direction:column;align-items:stretch;gap:0;
    overflow-y:auto;transform:translateY(-10px);opacity:0;pointer-events:none;transition:opacity .22s ease,transform .22s ease}
  .nav-links.open{transform:none;opacity:1;pointer-events:auto}
  .nav-links a{font-size:17px;font-weight:600;padding:16px 10px;border-bottom:1px solid var(--line);border-radius:0}
  .nav-links a:hover{background:transparent}
  .nav-links a.active{color:var(--brand);background:var(--brand-mist);border-radius:8px;border-bottom-color:var(--brand-mist)}
  .nav-links a.active::after{display:none}
  .command-search{display:none}
  .nav-right .icon-btn:not(.burger){display:none}
  .burger{display:inline-flex}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:768px){
  .article-main{padding-top:12px}
  .article-shell{max-width:100%}
  .article-body{font-size:16px;line-height:1.85}
  .related-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
  .cta-inner{padding:28px 22px;border-radius:18px}
  .cta-band{padding:56px 0 64px}
  .related{padding-top:52px}
  .article-foot{margin-top:44px;padding-top:34px}
}
@media (max-width:640px){
  .nav-inner .btn-sm{display:none}
  .brand-text{font-size:15px}
  .related-grid{grid-template-columns:1fr}
  .section-head{flex-direction:column;align-items:flex-start;gap:10px}
  .cta-actions{width:100%}
  .cta-actions .btn{flex:1 1 auto}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .breadcrumb .current{max-width:24ch}
}

/* roulang page: category1 */
:root{
    --brand:#1E5EDB;
    --brand-dark:#123C93;
    --brand-mist:#E8F0FE;
    --bg-soft:#F5F8FE;
    --amber:#F0A028;
    --ink:#0F1B2D;
    --text:#44526A;
    --muted:#94A3B8;
    --line:#E3E9F2;
    --white:#FFFFFF;
    --page:#F7F9FD;
    --danger:#D9534F;
    --radius-lg:18px;
    --radius-md:14px;
    --radius-img:16px;
    --radius-btn:10px;
    --shadow-1:0 1px 2px rgba(15,27,45,.04), 0 1px 3px rgba(15,27,45,.06);
    --shadow-2:0 10px 30px -12px rgba(20,50,120,.18);
    --shadow-3:0 18px 42px -16px rgba(20,50,120,.28);
    --container:1240px;
    --sec:96px;
  }

  *,*::before,*::after{box-sizing:border-box;}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
  body{
    margin:0;
    font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",Arial,sans-serif;
    background:var(--white);
    color:var(--text);
    font-size:16px;
    line-height:1.85;
    letter-spacing:0;
  }
  h1,h2,h3,h4{margin:0;color:var(--ink);font-weight:700;line-height:1.25;}
  p{margin:0;}
  ul,ol{margin:0;padding:0;list-style:none;}
  a{color:var(--brand);text-decoration:none;transition:color .18s ease, background-color .18s ease, border-color .18s ease;}
  a:hover{color:var(--brand-dark);}
  img{max-width:100%;display:block;}
  button{font-family:inherit;cursor:pointer;}
  input{font-family:inherit;}
  a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{
    outline:2px solid var(--brand);
    outline-offset:2px;
    border-radius:6px;
  }

  .container{
    width:100%;
    max-width:var(--container);
    margin:0 auto;
    padding:0 32px;
  }

  /* ---------- Header ---------- */
  .site-header{
    position:sticky;
    top:0;
    z-index:80;
    background:rgba(255,255,255,.96);
    backdrop-filter:blur(10px);
    border-bottom:1px solid var(--line);
    transition:box-shadow .25s ease;
  }
  .site-header.is-scrolled{box-shadow:var(--shadow-2);}
  .nav-inner{
    display:flex;
    align-items:center;
    gap:28px;
    height:72px;
  }
  .brand{
    display:flex;
    align-items:center;
    gap:10px;
    flex-shrink:0;
  }
  .brand-mark{
    width:38px;height:38px;
    border-radius:11px;
    background:linear-gradient(150deg,var(--brand) 0%,var(--brand-dark) 100%);
    color:#fff;
    font-size:13px;
    font-weight:800;
    letter-spacing:.04em;
    display:flex;
    align-items:center;
    justify-content:center;
    box-shadow:0 6px 16px -8px rgba(30,94,219,.75);
  }
  .brand-text{
    font-size:16px;
    font-weight:700;
    color:var(--ink);
    line-height:1.2;
    letter-spacing:-.01em;
    white-space:nowrap;
  }
  .brand-text span{color:var(--brand);}
  .nav-links{
    display:flex;
    align-items:center;
    gap:2px;
    margin-left:8px;
  }
  .nav-links a{
    position:relative;
    display:inline-block;
    padding:9px 13px;
    font-size:14px;
    font-weight:500;
    color:var(--text);
    border-radius:8px;
  }
  .nav-links a:hover{color:var(--brand);background:var(--bg-soft);}
  .nav-links a.active{color:var(--brand);font-weight:600;}
  .nav-links a.active::after{
    content:"";
    position:absolute;
    left:13px;right:13px;bottom:2px;
    height:2px;
    border-radius:2px;
    background:var(--brand);
  }
  .nav-right{
    display:flex;
    align-items:center;
    gap:10px;
    margin-left:auto;
  }
  .command-search{
    display:flex;
    align-items:center;
    gap:8px;
    height:42px;
    width:250px;
    padding:0 10px;
    border-radius:var(--radius-btn);
    background:var(--bg-soft);
    border:1px solid transparent;
    color:var(--muted);
    transition:border-color .2s ease, background-color .2s ease;
  }
  .command-search:focus-within{
    background:#fff;
    border-color:var(--brand);
    box-shadow:0 0 0 4px rgba(30,94,219,.1);
  }
  .command-search input{
    flex:1;
    min-width:0;
    border:none;
    background:transparent;
    outline:none;
    font-size:14px;
    color:var(--ink);
  }
  .command-search input::placeholder{color:var(--muted);}
  .kbd{
    font-size:11px;
    line-height:1;
    padding:4px 6px;
    border-radius:6px;
    background:#fff;
    border:1px solid var(--line);
    color:var(--muted);
    white-space:nowrap;
  }
  .icon-btn{
    width:42px;height:42px;
    display:flex;
    align-items:center;
    justify-content:center;
    border-radius:var(--radius-btn);
    border:1px solid var(--line);
    background:#fff;
    color:var(--text);
    transition:background-color .2s ease, color .2s ease, border-color .2s ease, transform .12s ease;
  }
  .icon-btn:hover{background:var(--brand-mist);color:var(--brand);border-color:#CBDCFB;}
  .icon-btn:active{transform:translateY(1px);}
  .burger{display:none;}

  .btn{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    gap:8px;
    height:46px;
    padding:0 20px;
    border-radius:var(--radius-btn);
    font-size:14.5px;
    font-weight:600;
    border:1.5px solid transparent;
    transition:background-color .18s ease, color .18s ease, border-color .18s ease, box-shadow .18s ease, transform .12s ease;
    white-space:nowrap;
  }
  .btn:active{transform:translateY(1px);}
  .btn-primary{background:var(--brand);color:#fff;box-shadow:0 10px 24px -14px rgba(30,94,219,.9);}
  .btn-primary:hover{background:var(--brand-dark);color:#fff;box-shadow:0 14px 30px -14px rgba(18,60,147,.85);}
  .btn-outline{background:#fff;color:var(--brand);border-color:#BBD1F8;}
  .btn-outline:hover{background:var(--brand-mist);color:var(--brand-dark);border-color:var(--brand);}
  .btn-sm{height:40px;padding:0 16px;font-size:13.5px;}
  .btn-text{
    display:inline-flex;
    align-items:center;
    gap:6px;
    font-size:14.5px;
    font-weight:600;
    color:var(--brand);
  }
  .btn-text svg{transition:transform .2s ease;}
  .btn-text:hover svg{transform:translateX(3px);}

  /* ---------- Mobile drawer ---------- */
  .drawer{
    position:fixed;
    inset:0;
    z-index:120;
    background:#fff;
    padding:24px;
    display:none;
    flex-direction:column;
    overflow-y:auto;
  }
  .drawer.open{display:flex;}
  .drawer-top{
    display:flex;
    align-items:center;
    justify-content:space-between;
    padding-bottom:20px;
    border-bottom:1px solid var(--line);
  }
  .drawer-nav{margin-top:12px;}
  .drawer-nav a{
    display:block;
    padding:18px 4px;
    font-size:20px;
    font-weight:600;
    color:var(--ink);
    border-bottom:1px solid var(--line);
  }
  .drawer-nav a.active{color:var(--brand);}
  .drawer-cta{margin-top:28px;display:flex;flex-direction:column;gap:12px;}
  .drawer-cta .btn{width:100%;height:50px;}

  /* ---------- Hero ---------- */
  .page-hero{
    position:relative;
    overflow:hidden;
    background:
      radial-gradient(1000px 460px at 88% -10%, #E4EEFF 0%, rgba(255,255,255,0) 70%),
      linear-gradient(180deg, #F3F8FF 0%, #FFFFFF 100%);
    padding:64px 0 72px;
  }
  .page-hero::after{
    content:"";
    position:absolute;
    right:-140px;top:-120px;
    width:420px;height:420px;
    border-radius:50%;
    background:radial-gradient(circle, rgba(30,94,219,.10) 0%, rgba(30,94,219,0) 70%);
    pointer-events:none;
  }
  .hero-grid{
    display:grid;
    grid-template-columns:1.05fr .95fr;
    gap:56px;
    align-items:center;
    position:relative;
    z-index:1;
  }
  .eyebrow{
    display:inline-flex;
    align-items:center;
    gap:8px;
    height:30px;
    padding:0 14px;
    border-radius:999px;
    background:var(--brand-mist);
    color:var(--brand-dark);
    font-size:12.5px;
    font-weight:600;
    letter-spacing:.02em;
  }
  .eyebrow .dot{
    width:6px;height:6px;border-radius:50%;background:var(--amber);
  }
  .page-hero h1{
    margin-top:20px;
    font-size:clamp(32px,4.4vw,54px);
    line-height:1.15;
    letter-spacing:-.02em;
    font-weight:700;
  }
  .page-hero .lead{
    margin-top:20px;
    font-size:17px;
    line-height:1.85;
    color:var(--text);
    max-width:620px;
  }
  .hero-actions{
    display:flex;
    flex-wrap:wrap;
    gap:14px;
    margin-top:32px;
  }
  .hero-points{
    display:flex;
    flex-wrap:wrap;
    gap:12px 26px;
    margin-top:32px;
    padding-top:24px;
    border-top:1px solid var(--line);
  }
  .hero-points li{
    display:flex;
    align-items:center;
    gap:8px;
    font-size:13.5px;
    color:var(--text);
  }
  .hero-points li::before{
    content:"";
    width:16px;height:16px;
    border-radius:50%;
    background:var(--brand-mist);
    background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%231E5EDB' stroke-width='3.4' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M4 12.5l5 5L20 6.5'/%3E%3C/svg%3E");
    background-size:10px 10px;
    background-position:center;
    background-repeat:no-repeat;
    flex-shrink:0;
  }
  .hero-media{
    border-radius:var(--radius-img);
    overflow:hidden;
    box-shadow:var(--shadow-2);
    background:#EEF3FB;
    aspect-ratio:16/9;
  }
  .hero-media img{
    width:100%;height:100%;
    object-fit:cover;
  }

  /* ---------- Breadcrumb ---------- */
  .crumb-bar{
    background:var(--bg-soft);
    border-top:1px solid var(--line);
    border-bottom:1px solid var(--line);
  }
  .crumb-inner{
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:20px;
    padding:14px 0;
    font-size:13.5px;
    color:var(--muted);
    flex-wrap:wrap;
  }
  .crumb-trail{
    display:flex;
    align-items:center;
    gap:8px;
    flex-wrap:wrap;
    min-width:0;
  }
  .crumb-trail a{color:var(--text);}
  .crumb-trail a:hover{color:var(--brand);}
  .crumb-trail .sep{color:#C6D2E2;}
  .crumb-trail .now{color:var(--muted);}
  .crumb-actions{display:flex;align-items:center;gap:16px;}

  /* ---------- Sections ---------- */
  .section{padding:var(--sec) 0;}
  .section-soft{background:var(--page);}
  .section-head{
    display:flex;
    align-items:flex-end;
    justify-content:space-between;
    gap:24px;
    margin-bottom:44px;
  }
  .section-head h2{
    font-size:clamp(26px,2.9vw,34px);
    letter-spacing:-.02em;
  }
  .section-head .sub{
    margin-top:12px;
    color:var(--text);
    font-size:15.5px;
    max-width:660px;
  }
  .kicker{
    display:inline-block;
    font-size:12.5px;
    font-weight:700;
    letter-spacing:.1em;
    color:var(--brand);
    margin-bottom:12px;
    text-transform:uppercase;
  }

  /* ---------- Prep list ---------- */
  .prep-grid{
    display:grid;
    grid-template-columns:1.1fr .9fr;
    gap:56px;
    align-items:center;
  }
  .prep-list{display:flex;flex-direction:column;gap:8px;}
  .prep-item{
    display:flex;
    gap:18px;
    padding:20px 22px;
    border-radius:var(--radius-md);
    background:#fff;
    border:1px solid var(--line);
    box-shadow:var(--shadow-1);
    transition:transform .22s ease, box-shadow .22s ease, border-color .22s ease;
  }
  .prep-item:hover{
    transform:translateY(-3px);
    box-shadow:var(--shadow-2);
    border-color:#CBDCFB;
  }
  .prep-num{
    flex-shrink:0;
    width:34px;height:34px;
    border-radius:10px;
    background:var(--brand-mist);
    color:var(--brand-dark);
    font-size:14px;
    font-weight:700;
    display:flex;
    align-items:center;
    justify-content:center;
  }
  .prep-item h3{font-size:16.5px;font-weight:600;}
  .prep-item p{margin-top:6px;font-size:14.5px;line-height:1.75;color:var(--text);}
  .prep-media{
    border-radius:var(--radius-img);
    overflow:hidden;
    box-shadow:var(--shadow-3);
    background:#EEF3FB;
    aspect-ratio:4/3;
  }
  .prep-media img{width:100%;height:100%;object-fit:cover;}

  /* ---------- Card grid ---------- */
  .card-grid{
    display:grid;
    grid-template-columns:repeat(3,minmax(0,1fr));
    gap:26px;
  }
  .topic-card{
    display:flex;
    flex-direction:column;
    background:#fff;
    border:1px solid var(--line);
    border-radius:var(--radius-lg);
    overflow:hidden;
    box-shadow:var(--shadow-1);
    transition:transform .25s ease, box-shadow .25s ease, border-color .25s ease;
  }
  .topic-card:hover{
    transform:translateY(-4px);
    box-shadow:var(--shadow-3);
    border-color:#CBDCFB;
  }
  .topic-figure{
    position:relative;
    aspect-ratio:16/9;
    background:#EEF3FB;
    overflow:hidden;
  }
  .topic-figure img{
    width:100%;height:100%;
    object-fit:cover;
    transition:transform .45s ease;
  }
  .topic-card:hover .topic-figure img{transform:scale(1.03);}
  .topic-figure .tag{
    position:absolute;
    left:14px;top:14px;
    height:24px;
    padding:0 10px;
    display:inline-flex;
    align-items:center;
    border-radius:999px;
    font-size:12px;
    font-weight:600;
    background:rgba(255,255,255,.94);
    color:var(--brand-dark);
    box-shadow:var(--shadow-1);
  }
  .topic-figure .tag.hot{color:#8A5A05;background:#FDF2DF;}
  .topic-body{
    padding:22px 22px 20px;
    display:flex;
    flex-direction:column;
    flex:1;
  }
  .topic-body h3{font-size:17.5px;font-weight:600;line-height:1.45;}
  .topic-body p{
    margin-top:10px;
    font-size:14.5px;
    line-height:1.78;
    color:var(--text);
    display:-webkit-box;
    -webkit-line-clamp:2;
    -webkit-box-orient:vertical;
    overflow:hidden;
  }
  .topic-foot{
    margin-top:auto;
    padding-top:18px;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:12px;
    font-size:13px;
    color:var(--muted);
  }
  .topic-foot .go{
    display:flex;
    align-items:center;
    gap:6px;
    color:var(--brand);
    font-weight:600;
    font-size:13px;
  }
  .topic-foot .go svg{transition:transform .22s ease;}
  .topic-card:hover .topic-foot .go svg{transform:translateX(3px);}

  /* ---------- Pager ---------- */
  .pager{
    margin-top:48px;
    display:flex;
    align-items:center;
    justify-content:center;
    gap:10px;
    flex-wrap:wrap;
  }
  .pager a,.pager span{
    min-width:42px;
    height:42px;
    padding:0 14px;
    display:inline-flex;
    align-items:center;
    justify-content:center;
    border-radius:var(--radius-btn);
    border:1px solid var(--line);
    background:#fff;
    color:var(--text);
    font-size:14px;
    font-weight:500;
    transition:all .18s ease;
  }
  .pager a:hover{background:var(--brand-mist);border-color:#CBDCFB;color:var(--brand-dark);}
  .pager .current{
    background:var(--brand);
    border-color:var(--brand);
    color:#fff;
    font-weight:600;
  }
  .pager .disabled{color:#C3CCDA;background:var(--page);}
  .pager-note{
    margin-top:18px;
    text-align:center;
    font-size:13px;
    color:var(--muted);
  }

  /* ---------- Split feature ---------- */
  .split{
    display:grid;
    grid-template-columns:.95fr 1.05fr;
    gap:56px;
    align-items:center;
  }
  .split-media{
    border-radius:var(--radius-img);
    overflow:hidden;
    box-shadow:var(--shadow-2);
    background:#EEF3FB;
    aspect-ratio:4/3;
  }
  .split-media img{width:100%;height:100%;object-fit:cover;}
  .split h2{font-size:clamp(26px,2.9vw,34px);letter-spacing:-.02em;}
  .split .sub{margin-top:14px;font-size:15.5px;}
  .check-list{margin-top:28px;display:flex;flex-direction:column;gap:16px;}
  .check-list li{
    display:flex;
    gap:14px;
    align-items:flex-start;
  }
  .check-list .mark{
    flex-shrink:0;
    width:24px;height:24px;
    margin-top:3px;
    border-radius:8px;
    background:var(--brand-mist);
    background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%231E5EDB' stroke-width='3.2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M4 12.5l5 5L20 6.5'/%3E%3C/svg%3E");
    background-size:13px 13px;
    background-position:center;
    background-repeat:no-repeat;
  }
  .check-list strong{display:block;font-size:16px;color:var(--ink);font-weight:600;}
  .check-list span{display:block;margin-top:4px;font-size:14.5px;line-height:1.75;color:var(--text);}

  .chip-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px;}
  .chip{
    height:30px;
    padding:0 14px;
    display:inline-flex;
    align-items:center;
    border-radius:999px;
    background:#fff;
    border:1px solid var(--line);
    font-size:13px;
    color:var(--text);
  }
  .chip.brand{background:var(--brand-mist);border-color:transparent;color:var(--brand-dark);font-weight:600;}

  /* ---------- Steps ---------- */
  .steps{
    display:grid;
    grid-template-columns:repeat(4,minmax(0,1fr));
    gap:24px;
    position:relative;
  }
  .step{
    background:#fff;
    border:1px solid var(--line);
    border-radius:var(--radius-md);
    padding:24px 22px 22px;
    box-shadow:var(--shadow-1);
    transition:transform .22s ease, box-shadow .22s ease;
  }
  .step:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);}
  .step .idx{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    width:32px;height:32px;
    border-radius:9px;
    background:var(--brand);
    color:#fff;
    font-size:13.5px;
    font-weight:700;
  }
  .step h3{margin-top:16px;font-size:16.5px;font-weight:600;}
  .step p{margin-top:8px;font-size:14.5px;line-height:1.75;color:var(--text);}

  /* ---------- FAQ ---------- */
  .faq-wrap{max-width:860px;margin:0 auto;display:flex;flex-direction:column;gap:14px;}
  .faq-item{
    background:#fff;
    border:1px solid var(--line);
    border-radius:var(--radius-md);
    box-shadow:var(--shadow-1);
    overflow:hidden;
    transition:box-shadow .22s ease, border-color .22s ease;
  }
  .faq-item[open]{box-shadow:var(--shadow-2);border-color:#CBDCFB;}
  .faq-item summary{
    list-style:none;
    cursor:pointer;
    padding:20px 24px;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:20px;
    font-size:16.5px;
    font-weight:600;
    color:var(--ink);
    position:relative;
  }
  .faq-item summary::-webkit-details-marker{display:none;}
  .faq-item summary::before{
    content:"";
    position:absolute;
    left:0;top:14px;bottom:14px;
    width:3px;
    border-radius:0 3px 3px 0;
    background:var(--brand);
    opacity:0;
    transition:opacity .2s ease;
  }
  .faq-item[open] summary::before{opacity:1;}
  .faq-icon{
    flex-shrink:0;
    width:26px;height:26px;
    border-radius:8px;
    background:var(--bg-soft);
    color:var(--brand);
    display:flex;
    align-items:center;
    justify-content:center;
    transition:transform .2s ease, background-color .2s ease;
  }
  .faq-item[open] .faq-icon{transform:rotate(45deg);background:var(--brand-mist);}
  .faq-body{
    padding:0 24px 22px 24px;
    font-size:15px;
    line-height:1.85;
    color:var(--text);
    border-top:1px solid var(--line);
    padding-top:18px;
  }

  /* ---------- CTA ---------- */
  .cta-band{
    background:linear-gradient(120deg,#EDF4FF 0%,#F7FAFF 100%);
    border:1px solid #DCE8FB;
    border-radius:var(--radius-lg);
    padding:48px 48px;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:36px;
    box-shadow:var(--shadow-1);
  }
  .cta-band h2{font-size:clamp(24px,2.6vw,32px);letter-spacing:-.02em;}
  .cta-band p{margin-top:12px;font-size:15.5px;max-width:620px;}
  .cta-actions{display:flex;flex-direction:column;gap:14px;align-items:flex-start;flex-shrink:0;}

  /* ---------- Footer ---------- */
  .site-footer{
    background:var(--page);
    border-top:1px solid var(--line);
    padding:72px 0 0;
    margin-top:0;
  }
  .footer-grid{
    display:grid;
    grid-template-columns:1.5fr 1fr 1fr 1.1fr;
    gap:44px;
    padding-bottom:52px;
  }
  .footer-brandline{display:flex;align-items:center;gap:10px;margin-bottom:18px;}
  .footer-col p{font-size:14.5px;line-height:1.85;color:var(--text);max-width:340px;}
  .footer-col h3{
    font-size:15px;
    font-weight:700;
    color:var(--ink);
    margin-bottom:18px;
  }
  .footer-col ul{display:flex;flex-direction:column;gap:12px;}
  .footer-col ul a{font-size:14px;color:var(--text);}
  .footer-col ul a:hover{color:var(--brand);}
  .footer-col ul span{font-size:14px;color:var(--muted);}
  .footer-bottom{
    border-top:1px solid var(--line);
    padding:22px 0 28px;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:16px;
    flex-wrap:wrap;
    font-size:13.5px;
    color:var(--muted);
  }
  .footer-bottom a{color:var(--muted);}
  .footer-bottom a:hover{color:var(--brand);}

  /* ---------- Responsive ---------- */
  @media (max-width:1180px){
    .nav-links{gap:0;}
    .nav-links a{padding:9px 10px;font-size:13.5px;}
    .command-search{width:200px;}
    .kbd{display:none;}
  }
  @media (max-width:1024px){
    :root{--sec:72px;}
    .container{padding:0 24px;}
    .nav-links,.command-search,.nav-right .btn-primary{display:none;}
    .burger{display:flex;}
    .hero-grid{grid-template-columns:1fr;gap:40px;}
    .hero-media{order:-1;}
    .page-hero{padding:44px 0 56px;}
    .prep-grid,.split{grid-template-columns:1fr;gap:36px;}
    .card-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:22px;}
    .steps{grid-template-columns:repeat(2,minmax(0,1fr));}
    .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:36px;}
    .cta-band{flex-direction:column;align-items:flex-start;padding:40px 32px;}
  }
  @media (max-width:640px){
    :root{--sec:56px;}
    .container{padding:0 16px;}
    .brand-text{font-size:15px;}
    .page-hero h1{font-size:clamp(28px,7.4vw,36px);}
    .page-hero .lead{font-size:15.5px;}
    .hero-actions{flex-direction:column;}
    .hero-actions .btn{width:100%;}
    .hero-points{flex-direction:column;gap:12px;}
    .section-head{flex-direction:column;align-items:flex-start;gap:14px;margin-bottom:32px;}
    .card-grid,.steps{grid-template-columns:1fr;}
    .footer-grid{grid-template-columns:1fr;gap:0;}
    .footer-col{padding:20px 0;border-bottom:1px solid var(--line);}
    .footer-col:last-child{border-bottom:none;}
    .footer-col h3{margin-bottom:14px;}
    .footer-col p{max-width:none;}
    .footer-bottom{flex-direction:column;align-items:flex-start;}
    .cta-band{padding:32px 20px;}
    .cta-actions{width:100%;}
    .cta-actions .btn{width:100%;}
    .crumb-inner{flex-direction:column;align-items:flex-start;gap:10px;}
  }

/* roulang page: category2 */
:root{
  --brand:#1E5EDB;
  --brand-deep:#123C93;
  --brand-hover:#1A52C4;
  --brand-soft:#E8F0FE;
  --bg-soft:#F5F8FE;
  --bg-page:#F7F9FD;
  --amber:#F0A028;
  --amber-soft:#FFF4E2;
  --amber-ink:#B87407;
  --ink:#0F1B2D;
  --text:#44526A;
  --muted:#94A3B8;
  --line:#E3E9F2;
  --danger:#D9534F;
  --white:#FFFFFF;
  --r-lg:18px;
  --r-md:14px;
  --r-img:16px;
  --r-btn:10px;
  --sh-1:0 1px 2px rgba(15,27,45,.04),0 1px 3px rgba(15,27,45,.06);
  --sh-2:0 10px 30px -12px rgba(20,50,120,.18);
  --sh-3:0 18px 42px -16px rgba(20,50,120,.28);
  --sec-y:88px;
  --focus:0 0 0 3px rgba(30,94,219,.16);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC","Segoe UI",Roboto,sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--text);
  background:var(--white);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0}
ul,ol{padding:0;list-style:none}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%;height:auto;background:#EEF3FB}
button,input{font:inherit;color:inherit}
button{cursor:pointer}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px}
.container{width:100%;max-width:1240px;margin:0 auto;padding:0 32px}
.section{padding:var(--sec-y) 0}
.section-alt{background:var(--bg-page)}

/* ---------- header / nav ---------- */
.site-header{
  position:sticky;top:0;z-index:70;
  background:rgba(255,255,255,.94);
  backdrop-filter:saturate(180%) blur(12px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .25s ease;
}
.site-header.is-scrolled{box-shadow:0 8px 26px -18px rgba(20,50,120,.45)}
.nav-inner{display:flex;align-items:center;gap:22px;height:72px}
.brand{display:flex;align-items:center;gap:10px;flex:none}
.brand-mark{
  width:38px;height:38px;border-radius:11px;
  display:grid;place-items:center;
  background:linear-gradient(135deg,#2568E6,#123C93);
  color:#fff;font-size:12.5px;font-weight:800;letter-spacing:.04em;
  box-shadow:0 6px 16px -8px rgba(30,94,219,.7);
}
.brand-text{font-size:17px;font-weight:700;color:var(--ink);letter-spacing:-.01em;white-space:nowrap}
.brand-text span{color:var(--brand)}
.nav-links{display:flex;align-items:center;gap:2px;margin-left:6px}
.nav-links a{
  position:relative;display:inline-flex;align-items:center;height:36px;
  padding:0 12px;font-size:14px;font-weight:500;color:var(--text);
  border-radius:8px;transition:color .2s ease,background .2s ease;
}
.nav-links a:hover{color:var(--brand);background:var(--bg-soft)}
.nav-links a.active{color:var(--brand);font-weight:600}
.nav-links a.active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:-2px;height:2px;
  background:var(--brand);border-radius:2px;
}
.nav-right{margin-left:auto;display:flex;align-items:center;gap:10px}
.command-search{
  display:flex;align-items:center;gap:8px;
  height:38px;width:246px;padding:0 10px;
  background:var(--bg-soft);border:1px solid var(--line);border-radius:10px;
  color:var(--muted);transition:border-color .2s,box-shadow .2s,background .2s;
}
.command-search:focus-within{background:#fff;border-color:var(--brand);box-shadow:var(--focus)}
.command-search input{
  flex:1;min-width:0;border:0;background:transparent;outline:none;
  font-size:13.5px;color:var(--ink);
}
.command-search input::placeholder{color:var(--muted)}
.kbd{
  flex:none;font-size:11px;line-height:1.6;color:var(--muted);
  background:#fff;border:1px solid var(--line);border-radius:5px;padding:0 5px;
  white-space:nowrap;
}
.icon-btn{
  width:38px;height:38px;display:grid;place-items:center;flex:none;
  border:1px solid var(--line);border-radius:10px;background:#fff;color:var(--text);
  transition:color .2s,border-color .2s,background .2s,transform .12s;
}
.icon-btn:hover{color:var(--brand);border-color:#C9DAF8;background:var(--brand-soft)}
.icon-btn:active{transform:translateY(1px)}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 20px;border:1px solid transparent;border-radius:var(--r-btn);
  font-size:14.5px;font-weight:600;line-height:1;white-space:nowrap;
  transition:background .2s,color .2s,border-color .2s,box-shadow .2s,transform .12s;
}
.btn-sm{height:38px;padding:0 16px;font-size:14px}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 8px 20px -12px rgba(30,94,219,.85)}
.btn-primary:hover{background:var(--brand-hover)}
.btn-primary:active{transform:translateY(1px)}
.btn-outline{background:#fff;border-color:var(--brand);color:var(--brand)}
.btn-outline:hover{background:var(--brand-soft)}
.btn-ghost{background:#fff;border-color:var(--line);color:var(--text)}
.btn-ghost:hover{border-color:#C9DAF8;color:var(--brand);background:var(--brand-soft)}
.btn-link{height:auto;padding:0;color:var(--brand);background:none;border:none;font-size:14px}
.btn-link:hover{color:var(--brand-deep);text-decoration:underline;text-underline-offset:4px}
.burger{display:none}

/* ---------- mobile drawer ---------- */
.mobile-drawer{
  position:fixed;inset:0;z-index:90;background:#fff;
  transform:translateY(-102%);transition:transform .3s ease;
  display:flex;flex-direction:column;padding:18px 20px 40px;overflow-y:auto;
}
.mobile-drawer.is-open{transform:translateY(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding-bottom:16px;border-bottom:1px solid var(--line)}
.drawer-nav{display:flex;flex-direction:column;margin-top:6px}
.drawer-nav a{
  display:flex;align-items:center;justify-content:space-between;
  font-size:19px;font-weight:600;color:var(--ink);
  padding:18px 4px;border-bottom:1px solid var(--line);
}
.drawer-nav a.active{color:var(--brand)}
.drawer-note{margin-top:26px;font-size:13px;color:var(--muted)}

/* ---------- page hero ---------- */
.page-hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line);
  background:linear-gradient(180deg,#EFF5FF 0%,#FFFFFF 88%);}
.page-hero-bg{
  position:absolute;inset:0;pointer-events:none;
  background-image:url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center right;opacity:.16;
}
.page-hero-inner{
  position:relative;display:grid;grid-template-columns:minmax(0,1fr) 330px;
  gap:48px;align-items:center;padding:60px 0 48px;
}
.hero-badges{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:18px}
.badge{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;
  border-radius:999px;font-size:12px;font-weight:600;
  background:var(--brand-soft);color:var(--brand);white-space:nowrap;
}
.badge-amber{background:var(--amber-soft);color:var(--amber-ink)}
.hero-title{
  font-size:clamp(30px,3.6vw,44px);line-height:1.2;font-weight:700;
  color:var(--ink);letter-spacing:-.02em;
}
.hero-sub{margin-top:16px;font-size:16.5px;line-height:1.9;color:var(--text);max-width:640px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.hero-points{display:flex;flex-wrap:wrap;gap:22px;margin-top:28px;padding-top:22px;border-top:1px dashed var(--line)}
.hero-points li{display:flex;align-items:center;gap:8px;font-size:13.5px;color:var(--text)}
.hero-points svg{color:var(--brand);flex:none}
.hero-visual{
  position:relative;border-radius:var(--r-lg);overflow:hidden;
  box-shadow:var(--sh-3);background:#EEF3FB;
}
.hero-visual img{width:100%;aspect-ratio:16/9;object-fit:cover}
.hero-visual figcaption{
  position:absolute;left:0;right:0;bottom:0;
  display:flex;align-items:center;gap:10px;
  padding:12px 14px;font-size:13px;color:var(--ink);
  background:linear-gradient(180deg,rgba(255,255,255,.55),rgba(255,255,255,.94));
  backdrop-filter:blur(6px);
}

/* ---------- breadcrumb bar ---------- */
.crumb-bar{background:var(--bg-page);border-bottom:1px solid var(--line)}
.breadcrumb{
  display:flex;align-items:center;gap:6px;flex-wrap:wrap;
  padding:12px 0;font-size:13px;color:var(--muted);
}
.breadcrumb a{color:var(--muted);transition:color .2s}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb .sep{color:#CBD5E1}
.breadcrumb .current{color:var(--ink);font-weight:500}

/* ---------- generic section head ---------- */
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:30px}
.section-title{font-size:clamp(23px,2.4vw,32px);font-weight:700;color:var(--ink);letter-spacing:-.02em;line-height:1.3}
.section-desc{margin-top:10px;font-size:15px;color:var(--text);max-width:660px;line-height:1.8}
.section-link{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--brand);white-space:nowrap}
.section-link:hover{color:var(--brand-deep);text-decoration:underline;text-underline-offset:4px}

/* ---------- filter pills ---------- */
.pills{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:20px}
.pill{
  height:34px;padding:0 16px;border-radius:999px;border:1px solid var(--line);
  background:#fff;font-size:13.5px;color:var(--text);
  transition:border-color .2s,color .2s,background .2s,box-shadow .2s;
}
.pill:hover{border-color:#C9DAF8;color:var(--brand);background:var(--bg-soft)}
.pill.is-active{background:var(--brand);border-color:var(--brand);color:#fff;box-shadow:0 8px 18px -12px rgba(30,94,219,.9)}

/* ---------- compact question list ---------- */
.qlist{
  border:1px solid var(--line);border-radius:var(--r-md);
  background:#fff;box-shadow:var(--sh-1);overflow:hidden;
}
.q-row{
  display:grid;grid-template-columns:minmax(0,1fr) auto 26px;
  align-items:center;gap:18px;padding:17px 22px;
  border-top:1px solid var(--line);
  transition:background .2s ease,padding .2s ease;
}
.q-row:first-child{border-top:none}
.q-row:hover{background:var(--brand-soft)}
.q-row:hover .q-title{color:var(--brand)}
.q-row:hover .q-arrow{transform:translateX(4px);color:var(--brand)}
.q-title{font-size:16px;font-weight:600;color:var(--ink);transition:color .2s ease;
  overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.q-meta{display:flex;align-items:center;gap:14px;font-size:13px;color:var(--muted);white-space:nowrap}
.q-cat{font-size:12px;font-weight:600;color:var(--brand);background:var(--brand-soft);border-radius:999px;padding:1px 10px}
.q-arrow{color:#C6D2E4;transition:transform .2s ease,color .2s ease;justify-self:end}
.q-empty{padding:44px 20px;text-align:center;color:var(--muted);font-size:14px}

/* ---------- steps ---------- */
.step-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px}
.step-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
  padding:24px 22px;box-shadow:var(--sh-1);
  transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
}
.step-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:#CDDFFB}
.step-num{
  width:34px;height:34px;border-radius:10px;display:grid;place-items:center;
  background:var(--brand-soft);color:var(--brand);font-size:15px;font-weight:700;
}
.step-card h3{margin-top:16px;font-size:17px;font-weight:600;color:var(--ink)}
.step-card p{margin-top:8px;font-size:14.5px;color:var(--text);line-height:1.8}

/* ---------- evidence block ---------- */
.evidence{display:grid;grid-template-columns:1.02fr .98fr;gap:28px;align-items:stretch}
.evidence-figure{
  position:relative;border-radius:var(--r-lg);overflow:hidden;
  box-shadow:var(--sh-2);background:#EEF3FB;min-height:320px;
}
.evidence-figure img{width:100%;height:100%;min-height:320px;object-fit:cover}
.evidence-figure figcaption{
  position:absolute;left:20px;right:20px;bottom:20px;
  background:rgba(255,255,255,.94);border-radius:12px;padding:14px 16px;
  font-size:13.5px;color:var(--text);box-shadow:var(--sh-1);
}
.evidence-figure figcaption strong{display:block;font-size:15px;color:var(--ink);margin-bottom:4px}
.evidence-list{display:flex;flex-direction:column;gap:16px}
.evidence-item{
  display:flex;gap:16px;padding:20px;background:#fff;border:1px solid var(--line);
  border-radius:var(--r-md);box-shadow:var(--sh-1);
  transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
}
.evidence-item:hover{transform:translateY(-3px);box-shadow:var(--sh-2);border-color:#CDDFFB}
.evidence-icon{
  flex:none;width:38px;height:38px;border-radius:11px;display:grid;place-items:center;
  background:var(--brand-soft);color:var(--brand);
}
.evidence-item h3{font-size:16px;font-weight:600;color:var(--ink)}
.evidence-item p{margin-top:6px;font-size:14.5px;color:var(--text);line-height:1.8}

/* ---------- faq ---------- */
.faq-wrap{max-width:860px;margin:0 auto;display:flex;flex-direction:column;gap:14px}
.faq-item{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
  box-shadow:var(--sh-1);overflow:hidden;transition:box-shadow .2s,border-color .2s;
}
.faq-item summary{
  position:relative;list-style:none;cursor:pointer;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 24px;font-size:16.5px;font-weight:600;color:var(--ink);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:"";flex:none;width:12px;height:12px;margin-right:4px;
  border-right:2px solid var(--muted);border-bottom:2px solid var(--muted);
  transform:rotate(45deg);transition:transform .2s ease,border-color .2s ease;
}
.faq-item[open] summary::after{transform:rotate(-135deg);border-color:var(--brand)}
.faq-item[open]{border-color:#CDDFFB;box-shadow:var(--sh-2)}
.faq-item[open] summary::before{
  content:"";position:absolute;left:0;top:16px;bottom:16px;width:3px;
  background:var(--brand);border-radius:0 3px 3px 0;
}
.faq-body{padding:0 24px 22px;font-size:15.5px;color:var(--text);animation:fadeIn .2s ease}
@keyframes fadeIn{from{opacity:0;transform:translateY(-2px)}to{opacity:1;transform:none}}

/* ---------- cta band ---------- */
.cta-band{
  display:flex;align-items:center;justify-content:space-between;gap:32px;
  padding:40px 44px;border-radius:var(--r-lg);
  background:linear-gradient(135deg,#EAF2FF 0%,#F7FAFF 100%);
  border:1px solid #D8E5FB;box-shadow:var(--sh-1);
}
.cta-band h2{font-size:clamp(21px,2.2vw,28px);font-weight:700;color:var(--ink);letter-spacing:-.01em}
.cta-band p{margin-top:10px;font-size:15px;color:var(--text);max-width:620px}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap;flex:none}

/* ---------- footer ---------- */
.site-footer{background:var(--bg-page);border-top:1px solid var(--line);padding:64px 0 28px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px}
.footer-brandline{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-col h3{font-size:14.5px;font-weight:600;color:var(--ink);margin-bottom:16px}
.footer-col ul{display:flex;flex-direction:column;gap:11px}
.footer-col a,.footer-col span{font-size:14px;color:var(--text);transition:color .2s}
.footer-col a:hover{color:var(--brand)}
.footer-col p{font-size:14px;color:var(--muted);line-height:1.85;max-width:340px}
.footer-bottom{
  margin-top:44px;padding-top:20px;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:var(--muted);
}
.footer-bottom a{color:var(--muted)}
.footer-bottom a:hover{color:var(--brand)}

/* ---------- responsive ---------- */
@media (max-width:1180px){
  .command-search{width:196px}
  .nav-links a{padding:0 9px}
}
@media (max-width:1023px){
  .nav-links,.command-search,.nav-right .btn{display:none}
  .burger{display:grid}
  .page-hero-inner{grid-template-columns:1fr;gap:32px;padding:44px 0 40px}
  .hero-visual{max-width:560px}
  .step-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .evidence{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  :root{--sec-y:72px}
}
@media (max-width:767px){
  .container{padding:0 20px}
  .section-head{flex-direction:column;align-items:flex-start;gap:12px}
  .cta-band{flex-direction:column;align-items:flex-start;padding:30px 26px}
  .cta-actions{width:100%}
  .cta-actions .btn{flex:1}
  .q-meta .q-cat{display:none}
  .q-row{grid-template-columns:minmax(0,1fr) auto 20px;gap:12px;padding:16px 16px}
  .q-title{white-space:normal;font-size:15.5px;line-height:1.6}
  .evidence-figure{min-height:220px}
  .evidence-figure img{min-height:220px}
}
@media (max-width:639px){
  .container{padding:0 16px}
  :root{--sec-y:56px}
  .nav-inner{height:64px;gap:12px}
  .brand-text{font-size:15.5px}
  .brand-mark{width:34px;height:34px;border-radius:10px;font-size:11.5px}
  .hero-actions{flex-direction:column;align-items:stretch}
  .hero-actions .btn{width:100%}
  .hero-points{gap:12px;flex-direction:column}
  .step-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:30px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .faq-item summary{padding:17px 18px;font-size:15.5px}
  .faq-body{padding:0 18px 20px;font-size:15px}
  .q-row{grid-template-columns:minmax(0,1fr) 18px}
  .q-meta{display:none}
  .cta-actions{flex-direction:column}
  .cta-actions .btn{width:100%}
}