/* roulang page: index */
:root{
  --brand-900:#10233F;
  --brand-700:#17427F;
  --brand-600:#1D4E9E;
  --brand-500:#2C6BC4;
  --brand-100:#E4EDF9;
  --accent:#F26419;
  --accent-soft:#FFF0E6;
  --green:#17A06A;
  --bg:#F4F7FC;
  --surface:#FFFFFF;
  --ink:#16202E;
  --muted:#5B6B80;
  --line:#E3EAF3;
  --shadow-card:0 1px 2px rgba(22,32,46,.04), 0 10px 26px -14px rgba(29,78,158,.22);
  --shadow-hover:0 2px 4px rgba(22,32,46,.06), 0 18px 38px -16px rgba(29,78,158,.30);
  --radius-card:16px;
  --radius-btn:10px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,sans-serif;
  background:var(--bg);
  color:var(--ink);
  font-size:16px;
  line-height:1.9;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit;}
input{font-family:inherit;}
h1,h2,h3,h4,p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--brand-600);outline-offset:2px;border-radius:4px;}
::selection{background:var(--brand-100);color:var(--brand-700);}

.wrap{max-width:1200px;margin:0 auto;padding-left:20px;padding-right:20px;}
@media(min-width:768px){.wrap{padding-left:24px;padding-right:24px;}}
@media(min-width:1024px){.wrap{padding-left:32px;padding-right:32px;}}

.section{padding:56px 0;border-top:1px solid var(--line);}
@media(min-width:768px){.section{padding:72px 0;}}
@media(min-width:1024px){.section{padding:96px 0;}}

.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:.06em;color:var(--brand-700);
  background:var(--brand-100);border-radius:999px;padding:4px 12px;line-height:1.6;
}
.section-head{display:flex;flex-wrap:wrap;gap:16px 24px;align-items:flex-end;justify-content:space-between;margin-bottom:32px;}
.section-head h2{font-size:24px;line-height:1.35;font-weight:700;margin-top:12px;letter-spacing:-.01em;}
@media(min-width:1024px){.section-head h2{font-size:28px;}}
.section-desc{font-size:15px;line-height:1.75;color:var(--muted);max-width:640px;margin-top:10px;}
.link-more{
  display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--brand-600);
  padding:8px 2px;white-space:nowrap;
}
.link-more:hover{text-decoration:underline;text-underline-offset:4px;}
.link-more span{transition:transform .2s ease-out;}
.link-more:hover span{transform:translateX(3px);}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;line-height:1;
  transition:all .2s ease-out;min-width:44px;
}
.btn-primary{background:var(--brand-600);color:#fff;box-shadow:0 6px 18px -10px rgba(29,78,158,.7);}
.btn-primary:hover{background:var(--brand-700);transform:translateY(-1px);}
.btn-outline{border:1px solid var(--brand-600);color:var(--brand-600);background:transparent;}
.btn-outline:hover{background:var(--brand-100);}
.btn-accent{background:var(--accent);color:#fff;}
.btn-accent:hover{background:#D9530E;transform:translateY(-1px);}
.btn-sm{height:40px;padding:0 16px;font-size:14px;}
.icon-btn{
  width:44px;height:44px;border-radius:var(--radius-btn);border:1px solid var(--line);
  background:#fff;display:inline-flex;align-items:center;justify-content:center;
  color:var(--brand-700);transition:all .2s ease-out;
}
.icon-btn:hover{background:#fff;box-shadow:var(--shadow-card);border-color:var(--brand-100);color:var(--brand-600);}

/* 徽章 */
.badge{display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:600;line-height:1.6;border-radius:999px;padding:3px 10px;}
.badge-cat{background:var(--brand-100);color:var(--brand-700);}
.badge-topic{background:var(--accent-soft);color:var(--accent);}
.badge-status{background:transparent;color:var(--green);padding-left:0;}
.badge-status::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--green);display:inline-block;}

/* 头部导航 */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(255,255,255,.95);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .2s ease-out;
}
.site-header.is-scrolled{box-shadow:0 6px 24px -18px rgba(22,32,46,.45);}
.nav-bar{display:flex;align-items:center;justify-content:space-between;height:68px;gap:16px;}
.nav-side{display:none;}
@media(min-width:1024px){
  .nav-bar{display:grid;grid-template-columns:1fr auto 1fr;height:76px;}
  .nav-side{display:flex;align-items:center;gap:6px;}
  .nav-side.right{justify-content:flex-end;gap:12px;}
}
.nav-link{
  position:relative;font-size:15px;color:var(--ink);padding:8px 12px;border-radius:8px;
  transition:color .18s ease-out,background .18s ease-out;line-height:1.6;
}
.nav-link:hover{color:var(--brand-600);background:var(--brand-100);}
.nav-link.active{color:var(--brand-600);font-weight:600;}
.nav-link.active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:0;height:2px;background:var(--brand-600);border-radius:2px;
}
.logo{
  display:inline-flex;align-items:center;gap:9px;font-size:19px;font-weight:700;letter-spacing:-.01em;
  color:var(--brand-900);white-space:nowrap;
}
.logo-mark{width:11px;height:11px;border-radius:3px;background:var(--accent);display:inline-block;transform:rotate(45deg);}
.logo-sub{font-size:11px;font-weight:500;color:var(--muted);letter-spacing:.08em;display:block;line-height:1;}
.logo-text{display:flex;flex-direction:column;gap:3px;}

.burger{width:44px;height:44px;display:inline-flex;flex-direction:column;justify-content:center;align-items:center;gap:5px;border-radius:10px;border:1px solid var(--line);background:#fff;}
@media(min-width:1024px){.burger{display:none;}}
.burger i{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px;transition:background .18s ease-out;}
.burger:hover i{background:var(--brand-600);}

.drawer-mask{
  position:fixed;inset:0;background:rgba(16,35,63,.5);opacity:0;visibility:hidden;
  transition:opacity .22s ease-out,visibility .22s ease-out;z-index:70;
}
.drawer-mask.open{opacity:1;visibility:visible;}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(86vw,340px);background:#fff;z-index:80;
  transform:translateX(100%);transition:transform .24s ease-out;
  display:flex;flex-direction:column;padding:20px;overflow-y:auto;
  box-shadow:-18px 0 40px -22px rgba(16,35,63,.4);
}
.drawer.open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding-bottom:16px;border-bottom:1px solid var(--line);}
.drawer-nav{margin-top:8px;}
.drawer-nav a{
  display:flex;align-items:center;justify-content:space-between;min-height:52px;
  font-size:16px;border-bottom:1px solid var(--line);color:var(--ink);
}
.drawer-nav a.active{color:var(--brand-600);font-weight:600;}
.drawer-nav a:hover{color:var(--brand-600);}
.drawer-cta{margin-top:20px;display:flex;flex-direction:column;gap:10px;}
.drawer-cta .btn{width:100%;}

/* Hero */
.hero{position:relative;overflow:hidden;background:linear-gradient(180deg,#FFFFFF 0%,var(--bg) 100%);}
.hero::after{
  content:"";position:absolute;right:-160px;top:-120px;width:520px;height:520px;border-radius:50%;
  background:radial-gradient(circle,rgba(44,107,196,.10) 0 38%,rgba(44,107,196,.05) 38% 54%,transparent 54% 100%);
  pointer-events:none;
}
.hero-inner{position:relative;z-index:1;display:grid;grid-template-columns:1fr;gap:36px;padding:44px 0 52px;}
@media(min-width:1024px){
  .hero-inner{grid-template-columns:7fr 5fr;gap:56px;min-height:520px;align-items:center;padding:64px 0 72px;}
}
.hero-label{
  display:inline-flex;align-items:center;gap:8px;font-size:12px;font-weight:600;color:var(--brand-700);
  border:1px solid var(--brand-100);background:#fff;border-radius:999px;padding:5px 14px;line-height:1.6;
}
.hero h1{
  font-size:26px;line-height:1.4;font-weight:700;letter-spacing:-.015em;margin-top:18px;color:var(--brand-900);
}
@media(min-width:640px){.hero h1{font-size:30px;}}
@media(min-width:1024px){.hero h1{font-size:32px;line-height:1.35;}}
.hero-sub{font-size:16px;line-height:1.85;color:var(--muted);margin-top:16px;max-width:560px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px;}
.hero-stats{
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:0;margin-top:36px;
  border:1px solid var(--line);border-radius:var(--radius-card);background:#fff;overflow:hidden;
}
.stat{padding:16px 18px;border-right:1px solid var(--line);}
.stat:last-child{border-right:none;}
.stat b{display:block;font-size:22px;line-height:1.3;font-weight:700;color:var(--brand-600);font-variant-numeric:tabular-nums;}
.stat span{display:block;font-size:13px;color:var(--muted);margin-top:4px;line-height:1.6;}
.hero-media{position:relative;}
.hero-media img{border-radius:12px;box-shadow:var(--shadow-card);width:100%;aspect-ratio:16/10;object-fit:cover;}
.hero-float{
  position:absolute;right:12px;bottom:-18px;max-width:62%;
  background:#fff;border:1px solid var(--line);border-radius:12px;padding:14px 16px;
  box-shadow:var(--shadow-card);
}
@media(min-width:1024px){.hero-float{right:16px;bottom:18px;}}
.hero-float small{display:block;font-size:12px;color:var(--muted);line-height:1.6;}
.hero-float strong{display:block;font-size:14px;font-weight:600;color:var(--ink);margin-top:4px;line-height:1.5;}
.hero-float em{display:inline-flex;align-items:center;gap:5px;font-style:normal;font-size:13px;font-weight:600;color:var(--brand-600);margin-top:8px;}

/* 快讯条 */
.ticker{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.ticker .wrap{display:flex;align-items:center;gap:16px;min-height:56px;padding-top:10px;padding-bottom:10px;overflow-x:auto;scrollbar-width:none;}
.ticker .wrap::-webkit-scrollbar{display:none;}
.ticker-tag{
  flex:0 0 auto;display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:700;color:#fff;
  background:var(--brand-600);border-radius:999px;padding:4px 12px;letter-spacing:.04em;
}
.ticker-item{flex:0 0 auto;display:inline-flex;align-items:center;gap:8px;font-size:13px;color:var(--muted);white-space:nowrap;}
.ticker-item::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--accent);display:inline-block;}
.ticker-divider{flex:0 0 auto;width:1px;height:16px;background:var(--line);}

/* 栏目卡 */
.grid-3{display:grid;grid-template-columns:1fr;gap:20px;}
@media(min-width:640px){.grid-3{grid-template-columns:repeat(2,minmax(0,1fr));gap:22px;}}
@media(min-width:1024px){.grid-3{grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}}
.card{
  display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius-card);box-shadow:var(--shadow-card);overflow:hidden;
  transition:transform .2s ease-out,box-shadow .2s ease-out;height:100%;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);}
.card-body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:10px;flex:1;}
.card h3{font-size:18px;line-height:1.5;font-weight:600;letter-spacing:-.01em;}
.card:hover h3{color:var(--brand-600);}
.card p{font-size:15px;line-height:1.75;color:var(--muted);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.card-foot{margin-top:auto;display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--brand-600);padding-top:6px;}
.card-foot span{transition:transform .2s ease-out;}
.card:hover .card-foot span{transform:translateX(2px);}
.card-num{
  font-size:13px;font-weight:700;color:var(--accent);font-variant-numeric:tabular-nums;letter-spacing:.06em;
}
.card-cover{position:relative;}
.card-cover img{width:100%;aspect-ratio:16/9;object-fit:cover;}
.card-corner{
  position:absolute;left:0;top:0;background:var(--accent);color:#fff;font-size:12px;font-weight:600;
  padding:5px 12px;border-bottom-right-radius:10px;line-height:1.6;
}
.card-count{
  position:absolute;right:12px;bottom:12px;background:rgba(255,255,255,.94);color:var(--brand-700);
  font-size:12px;font-weight:600;border-radius:999px;padding:3px 10px;line-height:1.6;
}

/* 合集网格（非等宽） */
.grid-collection{display:grid;grid-template-columns:1fr;gap:20px;}
@media(min-width:640px){.grid-collection{grid-template-columns:repeat(2,minmax(0,1fr));gap:22px;}}
@media(min-width:1024px){
  .grid-collection{grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
  .grid-collection .span-2{grid-column:span 2;}
}
.grid-collection .span-2 .card-cover img{aspect-ratio:16/7;}

/* 精选条目：1 大 + 2 小 */
.feature-layout{display:grid;grid-template-columns:1fr;gap:20px;}
@media(min-width:1024px){.feature-layout{grid-template-columns:7fr 5fr;gap:24px;align-items:stretch;}}
.feature-main{position:relative;border-radius:var(--radius-card);overflow:hidden;border:1px solid var(--line);background:#fff;box-shadow:var(--shadow-card);transition:transform .2s ease-out,box-shadow .2s ease-out;}
.feature-main:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);}
.feature-main img{width:100%;aspect-ratio:16/9;object-fit:cover;}
@media(min-width:1024px){.feature-main img{aspect-ratio:16/8;}}
.feature-main .feature-body{padding:22px 24px 24px;}
.feature-main h3{font-size:20px;line-height:1.5;font-weight:700;margin-top:10px;letter-spacing:-.01em;}
.feature-main p{font-size:15px;line-height:1.8;color:var(--muted);margin-top:10px;}
.meta-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-top:14px;font-size:13px;color:var(--muted);font-variant-numeric:tabular-nums;}
.feature-side{display:grid;grid-template-columns:1fr;gap:16px;}
.feature-mini{
  display:flex;gap:16px;background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);
  padding:18px 20px;box-shadow:var(--shadow-card);transition:transform .2s ease-out,box-shadow .2s ease-out;
}
.feature-mini:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);}
.feature-mini .mini-num{
  flex:0 0 auto;font-size:20px;font-weight:700;color:var(--accent);line-height:1.4;
  font-variant-numeric:tabular-nums;letter-spacing:.02em;
}
.feature-mini h4{font-size:16px;font-weight:600;line-height:1.55;}
.feature-mini:hover h4{color:var(--brand-600);}
.feature-mini .mini-meta{font-size:13px;color:var(--muted);margin-top:8px;font-variant-numeric:tabular-nums;}

/* 最新信息 CMS */
.news-grid{display:grid;grid-template-columns:1fr;gap:20px;}
@media(min-width:768px){.news-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:22px;}}
.news-card{
  display:flex;gap:0;flex-direction:column;background:#fff;border:1px solid var(--line);
  border-radius:var(--radius-card);box-shadow:var(--shadow-card);overflow:hidden;
  transition:transform .2s ease-out,box-shadow .2s ease-out;
}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);}
@media(min-width:640px){
  .news-card{flex-direction:row;}
  .news-thumb{width:168px;flex:0 0 168px;}
  .news-thumb span{writing-mode:horizontal-tb;}
}
.news-thumb{
  position:relative;background:var(--brand-100);display:flex;align-items:center;justify-content:center;
  min-height:120px;color:var(--brand-700);font-size:13px;font-weight:600;letter-spacing:.06em;
}
.news-thumb::after{
  content:"";position:absolute;inset:0;
  background:repeating-linear-gradient(45deg,rgba(29,78,158,.05) 0 8px,transparent 8px 16px);
}
.news-thumb span{position:relative;z-index:1;}
.news-body{padding:18px 20px 20px;display:flex;flex-direction:column;gap:10px;flex:1;min-width:0;}
.news-body h3{font-size:17px;font-weight:600;line-height:1.55;}
.news-body h3 a:hover{color:var(--brand-600);text-decoration:underline;text-underline-offset:4px;}
.news-body p{font-size:15px;line-height:1.75;color:var(--muted);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-meta{margin-top:auto;display:flex;flex-wrap:wrap;align-items:center;gap:12px;font-size:13px;color:var(--muted);font-variant-numeric:tabular-nums;}
.empty-state{
  border:1px dashed var(--line);background:#fff;border-radius:var(--radius-card);
  padding:48px 24px;text-align:center;display:flex;flex-direction:column;align-items:center;gap:14px;
}
.empty-icon{
  width:52px;height:52px;border-radius:14px;background:var(--brand-100);color:var(--brand-600);
  display:flex;align-items:center;justify-content:center;font-size:22px;
}
.empty-state p{font-size:15px;color:var(--muted);}

/* 横向滚动 */
.rail-head{display:flex;align-items:center;gap:12px;}
.rail-nav{display:none;gap:8px;}
@media(min-width:1024px){.rail-nav{display:inline-flex;}}
.rail-round{
  width:40px;height:40px;border-radius:999px;border:1px solid var(--line);background:#fff;color:var(--brand-700);
  display:inline-flex;align-items:center;justify-content:center;transition:all .2s ease-out;
}
.rail-round:hover{background:var(--brand-100);border-color:var(--brand-100);}
.rail-track{
  display:flex;gap:20px;overflow-x:auto;scroll-snap-type:x mandatory;
  padding:4px 16px 20px;margin:0 -16px;scrollbar-width:none;
}
@media(min-width:768px){.rail-track{padding-left:0;padding-right:0;margin:0;}}
.rail-track::-webkit-scrollbar{display:none;}
.rail-card{
  scroll-snap-align:start;flex:0 0 82%;min-width:82%;background:#fff;border:1px solid var(--line);
  border-radius:var(--radius-card);padding:20px;box-shadow:var(--shadow-card);
  transition:transform .2s ease-out,box-shadow .2s ease-out;display:flex;flex-direction:column;gap:10px;
}
@media(min-width:640px){.rail-card{flex:0 0 46%;min-width:46%;}}
@media(min-width:1024px){.rail-card{flex:0 0 calc((100% - 60px)/4);min-width:calc((100% - 60px)/4);}}
.rail-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);}
.rail-card h3{font-size:16px;font-weight:600;line-height:1.6;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.rail-card:hover h3{color:var(--brand-600);}
.rail-card time{font-size:13px;color:var(--muted);margin-top:auto;font-variant-numeric:tabular-nums;}

/* 读者反馈 */
.quote-grid{display:grid;grid-template-columns:1fr;gap:20px;}
@media(min-width:768px){.quote-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:22px;}}
.quote-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);padding:24px;
  box-shadow:var(--shadow-card);display:flex;flex-direction:column;gap:14px;height:100%;
}
.quote-card p{font-size:15px;line-height:1.85;color:var(--ink);flex:1;}
.quote-person{display:flex;align-items:center;gap:12px;border-top:1px solid var(--line);padding-top:14px;}
.quote-avatar{
  width:40px;height:40px;border-radius:12px;background:var(--brand-100);color:var(--brand-700);
  display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:700;
}
.quote-person strong{display:block;font-size:14px;font-weight:600;}
.quote-person small{display:block;font-size:12px;color:var(--muted);}
.quote-mark{font-size:26px;line-height:1;color:var(--accent);font-weight:700;}

/* FAQ */
.faq-layout{display:grid;grid-template-columns:1fr;gap:28px;}
@media(min-width:1024px){.faq-layout{grid-template-columns:5fr 7fr;gap:56px;align-items:start;}}
.faq-aside h2{font-size:24px;font-weight:700;line-height:1.4;margin-top:12px;}
@media(min-width:1024px){.faq-aside h2{font-size:26px;}}
.faq-aside p{font-size:15px;line-height:1.85;color:var(--muted);margin-top:14px;max-width:380px;}
.faq-list{display:flex;flex-direction:column;gap:14px;}
.faq-item{
  background:#fff;border:1px solid var(--line);border-radius:14px;overflow:hidden;
  transition:border-color .2s ease-out,box-shadow .2s ease-out;position:relative;
}
.faq-item::before{content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:transparent;transition:background .2s ease-out;}
.faq-item.open{border-color:var(--brand-100);box-shadow:var(--shadow-card);}
.faq-item.open::before{background:var(--brand-600);}
.faq-q{
  display:flex;align-items:center;justify-content:space-between;gap:16px;width:100%;
  text-align:left;font-size:16px;font-weight:600;line-height:1.6;padding:18px 20px;min-height:56px;
}
.faq-icon{
  flex:0 0 auto;width:22px;height:22px;position:relative;
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:var(--brand-600);border-radius:2px;transition:all .2s ease-out;
}
.faq-icon::before{left:3px;right:3px;top:10px;height:2px;}
.faq-icon::after{top:3px;bottom:3px;left:10px;width:2px;}
.faq-item.open .faq-icon::after{transform:scaleY(0);}
.faq-item.open .faq-icon::before{background:var(--accent);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .2s ease-out;}
.faq-a-inner{padding:0 20px 20px;font-size:15px;line-height:1.85;color:var(--muted);}

/* CTA 条 */
.cta-band{
  background:var(--brand-100);border-radius:var(--radius-card);padding:28px 24px;
  display:flex;flex-direction:column;gap:22px;
}
@media(min-width:768px){
  .cta-band{flex-direction:row;align-items:center;justify-content:space-between;padding:32px 36px;gap:32px;}
}
.cta-band h2{font-size:22px;font-weight:700;line-height:1.45;color:var(--brand-900);}
.cta-band p{font-size:15px;line-height:1.8;color:var(--brand-700);margin-top:8px;max-width:620px;}
.cta-actions{display:flex;gap:10px;flex:0 0 auto;}

/* 页脚 */
.site-footer{background:var(--brand-900);color:#fff;margin-top:0;padding:56px 0 0;}
.footer-grid{display:grid;grid-template-columns:1fr;gap:32px;}
@media(min-width:768px){.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px;}}
@media(min-width:1024px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;}}
.footer-brand{display:inline-flex;align-items:center;gap:9px;font-size:18px;font-weight:700;color:#fff;}
.footer-desc{font-size:14px;line-height:1.85;color:rgba(255,255,255,.72);margin-top:14px;max-width:340px;}
.footer-stats{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px;}
.footer-chip{
  font-size:12px;color:rgba(255,255,255,.85);border:1px solid rgba(255,255,255,.2);
  border-radius:999px;padding:3px 10px;line-height:1.6;
}
.footer-col h3{
  font-size:14px;font-weight:600;color:#fff;position:relative;padding-top:14px;margin-bottom:16px;
}
.footer-col h3::before{
  content:"";position:absolute;top:0;left:0;width:24px;height:2px;background:var(--accent);border-radius:2px;
}
.footer-col ul{display:flex;flex-direction:column;gap:10px;}
.footer-col a,.footer-col li{font-size:14px;line-height:1.75;color:rgba(255,255,255,.72);}
.footer-col a:hover{color:var(--brand-100);text-decoration:underline;text-underline-offset:4px;}
.footer-contact li{display:flex;gap:8px;}
.footer-contact b{color:rgba(255,255,255,.9);font-weight:600;}
.footer-bottom{
  margin-top:48px;border-top:1px solid rgba(255,255,255,.14);padding:20px 0 26px;
  display:flex;flex-direction:column;gap:10px;font-size:13px;color:rgba(255,255,255,.6);
}
@media(min-width:768px){.footer-bottom{flex-direction:row;align-items:center;justify-content:space-between;}}
.footer-bottom a{color:rgba(255,255,255,.7);}
.footer-bottom a:hover{color:#fff;text-decoration:underline;text-underline-offset:4px;}

/* 表单 */
.field{display:flex;flex-direction:column;gap:8px;}
.field label{font-size:13px;color:var(--muted);font-weight:600;}
.field input{
  height:48px;border-radius:var(--radius-btn);border:1px solid var(--line);background:#fff;
  padding:0 14px;font-size:15px;color:var(--ink);transition:border-color .18s ease-out,box-shadow .18s ease-out;
}
.field input:focus{outline:none;border-color:var(--brand-600);box-shadow:0 0 0 3px var(--brand-100);}
.field .hint{font-size:13px;color:var(--muted);}
.subscribe-row{display:flex;flex-direction:column;gap:12px;margin-top:20px;max-width:520px;}
@media(min-width:640px){.subscribe-row{flex-direction:row;align-items:flex-end;}}
.subscribe-row .field{flex:1;}
@media(max-width:639px){.subscribe-row .btn{width:100%;}}

.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0;}

/* roulang page: article */
:root{
  --brand-900:#10233F;
  --brand-700:#17427F;
  --brand-600:#1D4E9E;
  --brand-500:#2C6BC4;
  --brand-100:#E4EDF9;
  --accent:#F26419;
  --accent-soft:#FFF0E6;
  --green:#17A06A;
  --bg:#F4F7FC;
  --surface:#FFFFFF;
  --ink:#16202E;
  --muted:#5B6B80;
  --line:#E3EAF3;
  --radius-card:16px;
  --radius-btn:10px;
  --shadow-card:0 1px 2px rgba(22,32,46,.04), 0 10px 26px -14px rgba(29,78,158,.22);
  --shadow-card-hover:0 2px 4px rgba(22,32,46,.06), 0 18px 38px -16px rgba(29,78,158,.30);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,sans-serif;
  background:var(--bg);
  color:var(--ink);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-radius:12px}
a{color:inherit;text-decoration:none}
button,input,textarea{font-family:inherit;font-size:inherit}
:focus-visible{outline:2px solid var(--brand-600);outline-offset:2px;border-radius:6px}
.wrap{max-width:1200px;margin:0 auto;padding:0 20px}
.num{font-variant-numeric:tabular-nums}

/* ============ header / nav ============ */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(255,255,255,.95);
  backdrop-filter:saturate(160%) blur(10px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .2s ease-out;
}
.site-header.is-scrolled{box-shadow:0 10px 28px -20px rgba(16,35,63,.55)}
.nav-bar{display:flex;align-items:center;justify-content:space-between;gap:14px;height:74px}
.nav-side{display:flex;align-items:center;gap:4px;flex:1;min-width:0}
.nav-side.left{justify-content:flex-start}
.nav-side.right{justify-content:flex-end}
.nav-link{
  position:relative;padding:8px 12px;font-size:15px;color:#33445c;border-radius:8px;
  transition:color .18s ease-out,background-color .18s ease-out;white-space:nowrap;
}
.nav-link:hover{color:var(--brand-600);background:var(--brand-100)}
.nav-link.active{color:var(--brand-600);font-weight:600}
.nav-link.active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:0;height:2px;
  background:var(--brand-600);border-radius:2px;
}
.logo{display:flex;align-items:center;gap:10px;flex-shrink:0}
.logo-mark{width:12px;height:12px;background:var(--accent);border-radius:3px;flex-shrink:0}
.logo-text{display:flex;flex-direction:column;line-height:1.15}
.logo-text>span:first-child{font-size:19px;font-weight:700;letter-spacing:.4px;color:var(--brand-900)}
.logo-sub{font-size:11px;color:var(--muted);letter-spacing:1.4px;margin-top:2px}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--radius-btn);padding:11px 20px;font-size:15px;font-weight:600;
  border:1px solid transparent;cursor:pointer;white-space:nowrap;
  transition:background-color .2s ease-out,color .2s ease-out,transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;
}
.btn-primary{background:var(--brand-600);color:#fff}
.btn-primary:hover{background:var(--brand-700);transform:translateY(-1px);color:#fff}
.btn-outline{border-color:var(--brand-600);color:var(--brand-600);background:#fff}
.btn-outline:hover{background:var(--brand-100)}
.btn-accent{background:var(--accent);color:#fff}
.btn-accent:hover{background:#d9540f;transform:translateY(-1px);color:#fff}
.btn-sm{padding:8px 14px;font-size:14px}
.btn-block{width:100%}
.burger{
  display:none;width:44px;height:44px;border:1px solid var(--line);background:#fff;
  border-radius:10px;flex-direction:column;justify-content:center;align-items:center;gap:4px;cursor:pointer;
}
.burger i{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px;transition:background-color .2s ease-out}
.burger:hover i{background:var(--brand-600)}
.drawer-mask{
  position:fixed;inset:0;background:#10233f;opacity:0;pointer-events:none;
  transition:opacity .22s ease-out;z-index:90;
}
.drawer-mask.open{opacity:.5;pointer-events:auto}
.drawer{
  position:fixed;top:0;right:0;height:100%;width:300px;max-width:86vw;background:#fff;z-index:95;
  transform:translateX(102%);transition:transform .26s ease-out;
  display:flex;flex-direction:column;padding:20px;gap:6px;overflow-y:auto;
  box-shadow:-20px 0 40px -24px rgba(16,35,63,.45);
}
.drawer.open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding-bottom:14px;border-bottom:1px solid var(--line);margin-bottom:8px}
.drawer-title{font-size:16px;font-weight:700;color:var(--brand-900)}
.drawer-close{width:40px;height:40px;border:1px solid var(--line);border-radius:10px;background:#fff;cursor:pointer;color:var(--muted);font-size:16px}
.drawer-close:hover{color:var(--brand-600);background:var(--brand-100)}
.drawer a.drawer-link{
  display:flex;align-items:center;justify-content:space-between;
  min-height:48px;padding:0 12px;border-radius:10px;font-size:16px;color:#2c3b52;font-weight:500;
}
.drawer a.drawer-link:hover{background:var(--brand-100);color:var(--brand-600)}
.drawer a.drawer-link.active{color:var(--brand-600);background:var(--brand-100);font-weight:700}
.drawer .btn{margin-top:12px}

/* ============ breadcrumb ============ */
.crumb{padding:16px 0 4px;font-size:13px;color:var(--muted);display:flex;flex-wrap:wrap;gap:6px;align-items:center}
.crumb a:hover{color:var(--brand-600);text-decoration:underline;text-underline-offset:4px}
.crumb .sep{color:#b9c5d4;font-weight:300}
.crumb .current{color:var(--ink)}

/* ============ article head ============ */
.article-hero{background:var(--surface);border-bottom:1px solid var(--line);padding-bottom:34px}
.article-hero .wrap{max-width:1200px}
.meta-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:13px;color:var(--muted);margin-bottom:14px}
.badge{
  display:inline-flex;align-items:center;gap:6px;padding:4px 12px;border-radius:999px;
  font-size:13px;font-weight:600;background:var(--brand-100);color:var(--brand-700);
}
.badge-accent{background:var(--accent-soft);color:var(--accent)}
.dot{width:7px;height:7px;border-radius:50%;background:var(--green);display:inline-block}
.article-h1{
  font-size:32px;line-height:1.4;font-weight:700;letter-spacing:.2px;
  max-width:900px;margin:0 0 14px;color:var(--brand-900);
}
.article-lead{
  max-width:840px;font-size:16px;line-height:1.8;color:var(--muted);margin:0 0 22px;
  padding-left:14px;border-left:3px solid var(--brand-600);
}
.hr-line{height:1px;background:var(--line);border:0;margin:0}

/* ============ layout ============ */
.section{padding:56px 0}
@media(min-width:768px){.section{padding:72px 0}}
@media(min-width:1024px){.section{padding:88px 0}}
.article-layout{display:grid;grid-template-columns:minmax(0,1fr);gap:40px;align-items:start}
@media(min-width:1024px){
  .article-layout{grid-template-columns:minmax(0,1fr) 288px;gap:48px}
}
.article-main{max-width:800px}
.panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);box-shadow:var(--shadow-card);padding:24px}
.panel+.panel{margin-top:20px}
.panel-title{font-size:15px;font-weight:700;color:var(--brand-900);margin:0 0 14px;display:flex;align-items:center;gap:8px}
.panel-title::before{content:"";width:14px;height:3px;background:var(--accent);border-radius:2px}

/* ============ prose ============ */
.prose-site{font-size:17px;line-height:1.95;color:#26313f}
.prose-site p{margin:0 0 1.1em}
.prose-site h2{
  font-size:24px;font-weight:600;color:var(--brand-900);line-height:1.5;
  margin:40px 0 16px;padding-left:14px;border-left:4px solid var(--brand-600);
  scroll-margin-top:100px;
}
.prose-site h3{font-size:19px;font-weight:600;color:var(--brand-700);margin:28px 0 12px;scroll-margin-top:100px}
.prose-site ul,.prose-site ol{margin:0 0 1.15em;padding-left:22px}
.prose-site ul{list-style:none;padding-left:6px}
.prose-site ul li{position:relative;padding-left:20px;margin-bottom:8px}
.prose-site ul li::before{
  content:"";position:absolute;left:0;top:12px;width:7px;height:7px;background:var(--accent);border-radius:2px;
}
.prose-site ol{padding-left:24px}
.prose-site ol li{margin-bottom:8px;padding-left:4px}
.prose-site ol li::marker{color:var(--brand-600);font-weight:700}
.prose-site blockquote{
  margin:24px 0;padding:18px;background:var(--brand-100);border-left:3px solid var(--brand-600);
  border-radius:12px;color:#22364f;font-size:16px;
}
.prose-site blockquote p:last-child{margin-bottom:0}
.prose-site img{margin:22px auto;box-shadow:var(--shadow-card)}
.prose-site figcaption,.prose-site .caption{font-size:13px;color:var(--muted);text-align:center;margin-top:-8px}
.prose-site table{width:100%;border-collapse:collapse;margin:22px 0;font-size:15px;border:1px solid var(--line);border-radius:12px;overflow:hidden}
.prose-site th{background:var(--brand-100);color:var(--brand-900);font-weight:600;text-align:left}
.prose-site th,.prose-site td{padding:11px 14px;border:1px solid var(--line)}
.prose-site tbody tr:hover{background:#f8fbff}
.prose-site code{
  font-family:"SFMono-Regular",Consolas,"Liberation Mono",monospace;font-size:14px;
  background:var(--bg);border:1px solid var(--line);border-radius:6px;padding:2px 6px;
}
.prose-site pre{
  background:var(--bg);border:1px solid var(--line);border-radius:12px;padding:16px;
  overflow-x:auto;margin:22px 0;
}
.prose-site pre code{background:none;border:0;padding:0}
.prose-site a{color:var(--brand-600);text-decoration:underline;text-underline-offset:4px}
.prose-site a:hover{color:var(--brand-700)}
.prose-site hr{border:0;height:1px;background:var(--line);margin:34px 0}

.tag-row{display:flex;flex-wrap:wrap;gap:10px;margin:34px 0 0}
.tag{
  display:inline-flex;align-items:center;gap:6px;padding:6px 14px;border-radius:999px;
  border:1px solid var(--line);background:#fff;font-size:13px;color:var(--muted);
  transition:background-color .18s ease-out,color .18s ease-out,border-color .18s ease-out;
}
.tag:hover{background:var(--brand-100);color:var(--brand-700);border-color:var(--brand-100)}

.share-bar{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px;
  margin-top:24px;padding:18px 20px;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius-card);box-shadow:var(--shadow-card);
}
.share-bar .share-txt{font-size:14px;color:var(--muted)}
.icon-btn{
  width:44px;height:44px;border-radius:12px;border:1px solid var(--line);background:#fff;
  color:var(--brand-600);display:inline-flex;align-items:center;justify-content:center;cursor:pointer;
  transition:background-color .18s ease-out,color .18s ease-out,transform .18s ease-out,box-shadow .18s ease-out;
}
.icon-btn:hover{background:var(--brand-100);transform:translateY(-2px)}
.icon-btn.accent{background:var(--accent);border-color:var(--accent);color:#fff}
.icon-btn.accent:hover{background:#d9540f}

/* ============ sidebar ============ */
.sidebar{display:flex;flex-direction:column;gap:20px}
@media(min-width:1024px){.sidebar{position:sticky;top:98px}}
.toc-list{list-style:none;margin:0;padding:0;font-size:14px;max-height:340px;overflow-y:auto}
.toc-list li{margin-bottom:2px}
.toc-list a{
  display:block;padding:7px 10px;border-left:2px solid var(--line);color:var(--muted);border-radius:0 8px 8px 0;
  transition:color .18s ease-out,border-color .18s ease-out,background-color .18s ease-out;
  overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
}
.toc-list a:hover{color:var(--brand-600);background:#f7fafe}
.toc-list a.current{color:var(--brand-600);border-left-color:var(--brand-600);font-weight:600;background:#f7fafe}
.hot-list{list-style:none;margin:0;padding:0}
.hot-list li{display:flex;gap:12px;padding:11px 0;border-bottom:1px dashed var(--line)}
.hot-list li:last-child{border-bottom:0;padding-bottom:0}
.hot-num{
  font-size:13px;font-weight:700;color:var(--accent);flex-shrink:0;width:22px;
  font-variant-numeric:tabular-nums;line-height:1.7;
}
.hot-link{font-size:14px;line-height:1.6;color:#2c3b52;display:block}
.hot-link:hover{color:var(--brand-600)}
.hot-time{font-size:12px;color:var(--muted);margin-top:4px;display:block}
.cta-card{background:var(--brand-100);border-color:var(--brand-100)}
.cta-card p{font-size:14px;color:#31465f;margin:0 0 14px;line-height:1.75}

/* ============ cards / related ============ */
.grid-3{display:grid;grid-template-columns:1fr;gap:20px}
@media(min-width:640px){.grid-3{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1024px){.grid-3{grid-template-columns:repeat(3,1fr);gap:24px}}
.card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  box-shadow:var(--shadow-card);padding:20px;display:flex;flex-direction:column;gap:12px;
  transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-card-hover);border-color:#d5e2f3}
.card h3{font-size:18px;font-weight:600;line-height:1.55;margin:0;color:var(--brand-900)}
.card:hover h3{color:var(--brand-600)}
.card p{font-size:15px;line-height:1.75;color:var(--muted);margin:0;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card .more{font-size:14px;font-weight:600;color:var(--brand-600);display:inline-flex;align-items:center;gap:6px;margin-top:auto}
.card:hover .more i{transform:translateX(2px)}
.card .more i{transition:transform .2s ease-out}
.card-cover{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:12px}
.mini-card{
  display:flex;align-items:center;gap:16px;padding:18px 20px;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--radius-card);box-shadow:var(--shadow-card);
  transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;
}
.mini-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-card-hover);border-color:#d5e2f3}
.mini-card .mc-title{font-size:16px;font-weight:600;color:var(--brand-900);line-height:1.55}
.mini-card:hover .mc-title{color:var(--brand-600)}
.mini-card .mc-meta{font-size:13px;color:var(--muted);margin-top:6px}
.pager{display:grid;gap:16px;grid-template-columns:1fr;margin-top:28px}
@media(min-width:768px){.pager{grid-template-columns:1fr 1fr}}
.pager .pager-card{
  display:flex;flex-direction:column;gap:8px;padding:18px 20px;border:1px solid var(--line);
  border-radius:var(--radius-card);background:#fff;box-shadow:var(--shadow-card);
  transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;
}
.pager .pager-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-card-hover);border-color:#d5e2f3}
.pager .pager-label{font-size:13px;color:var(--muted);display:flex;align-items:center;gap:8px}
.pager .pager-title{font-size:16px;font-weight:600;color:var(--brand-900)}
.pager .align-right{text-align:right;align-items:flex-end}

/* ============ section head ============ */
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:26px}
.section-head h2{font-size:24px;font-weight:700;color:var(--brand-900);margin:0 0 6px;line-height:1.4}
.section-head p{font-size:15px;color:var(--muted);margin:0;max-width:640px}
.text-link{font-size:15px;font-weight:600;color:var(--brand-600);display:inline-flex;align-items:center;gap:6px}
.text-link:hover{text-decoration:underline;text-underline-offset:4px}
.text-link i{transition:transform .2s ease-out}
.text-link:hover i{transform:translateX(3px)}

/* ============ faq ============ */
.faq-grid{display:grid;grid-template-columns:1fr;gap:28px}
@media(min-width:1024px){.faq-grid{grid-template-columns:5fr 7fr;gap:48px}}
.faq-item{
  background:#fff;border:1px solid var(--line);border-radius:14px;margin-bottom:12px;overflow:hidden;
  transition:border-color .2s ease-out,box-shadow .2s ease-out;
}
.faq-item[open]{border-color:#cfdef2;box-shadow:var(--shadow-card)}
.faq-item summary{
  list-style:none;cursor:pointer;padding:17px 20px 17px 24px;font-size:16px;font-weight:600;color:var(--brand-900);
  position:relative;display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:44px;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:"+";font-size:22px;font-weight:400;color:var(--brand-600);line-height:1;flex-shrink:0;
  transition:color .2s ease-out,transform .2s ease-out;
}
.faq-item[open] summary::after{content:"−";color:var(--accent);transform:rotate(180deg)}
.faq-item[open] summary::before{content:"";position:absolute;left:0;top:12px;bottom:12px;width:3px;background:var(--brand-600);border-radius:3px}
.faq-body{padding:0 24px 18px;font-size:15px;line-height:1.85;color:#3b4a5e}
.faq-body p{margin:0 0 10px}
.faq-body p:last-child{margin-bottom:0}

/* ============ empty ============ */
.empty-state{
  text-align:center;padding:64px 24px;background:#fff;border:1px dashed #cfdcee;border-radius:var(--radius-card);
}
.empty-state i{font-size:34px;color:var(--brand-500);margin-bottom:16px;display:block}
.empty-state h2{font-size:20px;font-weight:700;color:var(--brand-900);margin:0 0 10px}
.empty-state p{font-size:15px;color:var(--muted);margin:0 auto 20px;max-width:420px}

/* ============ cta strip ============ */
.cta-strip{
  background:var(--brand-100);border-radius:var(--radius-card);padding:26px 24px;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:20px;
}
.cta-strip h2{font-size:20px;font-weight:700;color:var(--brand-900);margin:0 0 6px}
.cta-strip p{font-size:15px;color:#31465f;margin:0}
.cta-actions{display:flex;gap:10px;flex-wrap:wrap}

/* ============ footer ============ */
.site-footer{background:var(--brand-900);color:#e8eef7;margin-top:20px;padding:56px 0 26px;font-size:15px}
.footer-grid{display:grid;grid-template-columns:1fr;gap:34px}
@media(min-width:768px){.footer-grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1024px){.footer-grid{grid-template-columns:1.5fr 1fr 1fr 1.3fr;gap:40px}}
.footer-brand{display:inline-flex;align-items:center;gap:10px;font-size:18px;font-weight:700;color:#fff;margin-bottom:14px}
.footer-desc{font-size:14px;line-height:1.85;color:#a8bad3;margin:0 0 18px;max-width:340px}
.footer-stats{display:flex;flex-wrap:wrap;gap:8px}
.footer-chip{
  font-size:12px;padding:4px 12px;border-radius:999px;background:rgba(255,255,255,.09);
  border:1px solid rgba(255,255,255,.14);color:#c3d3e8;
}
.footer-col h3{
  font-size:14px;font-weight:600;color:#fff;margin:0 0 18px;position:relative;padding-top:12px;
}
.footer-col h3::before{content:"";position:absolute;top:0;left:0;width:22px;height:2px;background:var(--accent);border-radius:2px}
.footer-col ul{list-style:none;margin:0;padding:0}
.footer-col li{margin-bottom:11px}
.footer-col a{font-size:14px;color:#b9c9de;transition:color .18s ease-out}
.footer-col a:hover{color:#E4EDF9;text-decoration:underline;text-underline-offset:4px}
.footer-contact li{font-size:14px;color:#b9c9de;display:flex;gap:6px;line-height:1.7}
.footer-contact b{color:#e8eef7;font-weight:600;flex-shrink:0}
.footer-bottom{
  margin-top:40px;padding-top:20px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;font-size:13px;color:#93a8c4;
}

@media(max-width:1023px){
  .nav-side{display:none}
  .burger{display:flex}
  .nav-bar{justify-content:space-between}
  .logo{margin:0 auto}
}
@media(max-width:520px){
  .article-h1{font-size:26px}
  .section-head h2{font-size:21px}
  .cta-strip{padding:22px 18px}
  .cta-actions{width:100%}
  .cta-actions .btn{flex:1}
}

/* roulang page: category1 */
:root{
    --brand-900:#10233F;
    --brand-700:#17427F;
    --brand-600:#1D4E9E;
    --brand-500:#2C6BC4;
    --brand-100:#E4EDF9;
    --accent:#F26419;
    --accent-soft:#FFF0E6;
    --green:#17A06A;
    --bg:#F4F7FC;
    --surface:#FFFFFF;
    --ink:#16202E;
    --muted:#5B6B80;
    --line:#E3EAF3;
    --radius-card:16px;
    --radius-btn:10px;
    --shadow-card:0 1px 2px rgba(22,32,46,.04), 0 10px 26px -14px rgba(29,78,158,.22);
    --shadow-hover:0 2px 4px rgba(22,32,46,.06), 0 18px 38px -16px rgba(29,78,158,.30);
  }

  *,*::before,*::after{box-sizing:border-box}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
  body{
    margin:0;
    font-family:"PingFang SC","HarmonyOS Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,sans-serif;
    background:var(--bg);
    color:var(--ink);
    font-size:16px;
    line-height:1.9;
    -webkit-font-smoothing:antialiased;
  }
  h1,h2,h3,h4,p,ul,ol,figure{margin:0}
  ul,ol{list-style:none;padding:0}
  img{max-width:100%;display:block}
  a{color:inherit;text-decoration:none;transition:color .18s ease-out}
  button{font:inherit;color:inherit;background:none;border:0}
  input{font:inherit}
  a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible{outline:2px solid var(--brand-600);outline-offset:2px;border-radius:6px}
  ::selection{background:var(--brand-100);color:var(--brand-700)}
  ::-webkit-scrollbar{width:10px;height:10px}
  ::-webkit-scrollbar-track{background:transparent}
  ::-webkit-scrollbar-thumb{background:#c6d6ea;border-radius:999px;border:3px solid transparent;background-clip:content-box}
  ::-webkit-scrollbar-thumb:hover{background:#a7bede;background-clip:content-box}

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

  /* ---------- header ---------- */
  .site-header{
    position:sticky;top:0;z-index:60;
    background:rgba(255,255,255,.95);
    backdrop-filter:blur(10px);
    border-bottom:1px solid var(--line);
    transition:box-shadow .22s ease-out;
  }
  .site-header.is-scrolled{box-shadow:0 12px 30px -24px rgba(16,35,63,.5)}
  .nav-bar{display:flex;align-items:center;justify-content:space-between;gap:14px;min-height:76px}
  .nav-side{display:flex;align-items:center;gap:2px;flex:1 1 0}
  .nav-side.right{justify-content:flex-end;gap:12px}
  .nav-link{
    position:relative;display:inline-flex;align-items:center;
    padding:10px 12px;border-radius:8px;
    font-size:15px;color:var(--ink);
    transition:color .18s ease-out,background-color .18s ease-out;
  }
  .nav-link:hover{color:var(--brand-600);background:var(--brand-100)}
  .nav-link.active{color:var(--brand-600);font-weight:600}
  .nav-link.active::after{
    content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;
    background:var(--brand-600);border-radius:2px;
  }
  .logo{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}
  .logo-mark{
    width:14px;height:14px;border-radius:4px;
    background:var(--accent);
    box-shadow:0 0 0 3px var(--accent-soft);
    flex:0 0 auto;
  }
  .logo-text{display:flex;flex-direction:column;line-height:1.25}
  .logo-text > span:first-child{font-size:18px;font-weight:700;letter-spacing:.01em;color:var(--brand-900)}
  .logo-sub{font-size:11px;font-weight:400;letter-spacing:.06em;color:var(--muted)}
  .burger{
    display:none;width:44px;height:44px;border-radius:10px;
    border:1px solid var(--line);background:#fff;
    align-items:center;justify-content:center;flex-direction:column;gap:5px;
    cursor:pointer;transition:border-color .18s ease-out,background-color .18s ease-out;
  }
  .burger i{display:block;width:18px;height:2px;border-radius:2px;background:var(--ink);transition:background-color .18s ease-out}
  .burger:hover{border-color:var(--brand-600);background:var(--brand-100)}
  .burger:hover i{background:var(--brand-600)}

  /* ---------- drawer ---------- */
  .drawer-mask{
    position:fixed;inset:0;z-index:80;background:rgba(16,35,63,.5);
    opacity:0;visibility:hidden;transition:opacity .22s ease-out,visibility .22s ease-out;
  }
  .drawer-mask.open{opacity:1;visibility:visible}
  .drawer{
    position:fixed;top:0;right:0;z-index:90;
    width:min(86vw,360px);height:100%;
    background:#fff;padding:20px 20px 32px;
    display:flex;flex-direction:column;gap:18px;
    overflow-y:auto;
    transform:translateX(102%);
    transition:transform .24s ease-out;
    box-shadow:-24px 0 48px -30px rgba(16,35,63,.5);
  }
  .drawer.open{transform:none}
  .drawer-head{display:flex;align-items:center;justify-content:space-between;gap:12px;padding-bottom:14px;border-bottom:1px solid var(--line)}
  .drawer-close{
    width:40px;height:40px;border-radius:10px;border:1px solid var(--line);
    display:inline-flex;align-items:center;justify-content:center;color:var(--muted);
    cursor:pointer;transition:.18s ease-out;
  }
  .drawer-close:hover{background:var(--brand-100);color:var(--brand-600)}
  .drawer-search{
    display:flex;align-items:center;gap:10px;height:48px;padding:0 14px;
    border:1px solid var(--line);border-radius:var(--radius-btn);background:var(--bg);
  }
  .drawer-search i{color:var(--muted)}
  .drawer-search input{border:0;background:transparent;width:100%;height:100%;outline:none;font-size:15px;color:var(--ink)}
  .drawer-nav{display:flex;flex-direction:column}
  .drawer-link{
    display:flex;align-items:center;justify-content:space-between;
    min-height:48px;padding:0 4px;border-bottom:1px solid var(--line);
    font-size:16px;color:var(--ink);
  }
  .drawer-link i{font-size:12px;color:var(--muted)}
  .drawer-link.active{color:var(--brand-600);font-weight:600}
  .drawer-link:hover{color:var(--brand-600)}
  .drawer-cta{width:100%}

  /* ---------- buttons ---------- */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    height:44px;padding:0 20px;border-radius:var(--radius-btn);
    font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;
    transition:background-color .2s ease-out,color .2s ease-out,transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;
    white-space:nowrap;
  }
  .btn-sm{height:38px;padding:0 16px;font-size:14px}
  .btn-primary{background:var(--brand-600);color:#fff}
  .btn-primary:hover{background:var(--brand-700);color:#fff;transform:translateY(-1px)}
  .btn-outline{background:#fff;border-color:var(--brand-600);color:var(--brand-600)}
  .btn-outline:hover{background:var(--brand-100);color:var(--brand-700)}
  .btn-accent{background:var(--accent);color:#fff}
  .btn-accent:hover{background:#d9560f;color:#fff;transform:translateY(-1px)}
  .btn-icon{
    width:38px;height:38px;border-radius:10px;border:1px solid var(--line);background:#fff;
    display:inline-flex;align-items:center;justify-content:center;color:var(--brand-600);
    cursor:pointer;transition:.18s ease-out;
  }
  .btn-icon:hover{background:var(--brand-100);box-shadow:0 8px 18px -14px rgba(29,78,158,.6)}
  .btn-icon.is-accent{border-color:var(--accent);color:var(--accent)}
  .btn-icon.is-accent:hover{background:var(--accent-soft)}

  /* ---------- badges / tags ---------- */
  .badge{
    display:inline-flex;align-items:center;gap:6px;
    padding:3px 10px;border-radius:999px;
    font-size:12px;line-height:1.7;font-weight:600;
    background:var(--brand-100);color:var(--brand-700);
  }
  .badge-accent{background:var(--accent-soft);color:var(--accent)}
  .badge-green{background:rgba(23,160,106,.12);color:var(--green)}
  .stamp{
    display:inline-flex;align-items:center;gap:8px;
    padding:5px 12px;border:1px solid var(--brand-600);border-radius:999px;
    font-size:12px;letter-spacing:.08em;color:var(--brand-600);
  }
  .tag-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
  .tag{
    display:inline-flex;align-items:center;padding:6px 14px;border-radius:999px;
    border:1px solid var(--line);background:#fff;font-size:13px;color:var(--muted);
    transition:.18s ease-out;
  }
  .tag:hover{border-color:var(--brand-600);color:var(--brand-600);background:var(--brand-100)}

  /* ---------- breadcrumb ---------- */
  .breadcrumb{
    display:flex;align-items:center;gap:8px;
    padding:16px 0;font-size:13px;color:var(--muted);
  }
  .breadcrumb a:hover{color:var(--brand-600);text-decoration:underline;text-underline-offset:4px}
  .breadcrumb .current{color:var(--ink);font-weight:600}

  /* ---------- page head ---------- */
  .page-head{background:var(--surface);border-bottom:1px solid var(--line);padding-bottom:56px}
  .head-grid{display:grid;grid-template-columns:1.7fr 1fr;gap:44px;align-items:start;padding-top:8px}
  .page-head h1{
    font-size:32px;line-height:1.42;font-weight:700;
    color:var(--brand-900);margin-top:18px;letter-spacing:-.01em;
  }
  .lead{font-size:16px;line-height:1.9;color:var(--muted);margin-top:16px;max-width:62ch}
  .head-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}

  .head-stats{
    background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
    box-shadow:var(--shadow-card);padding:22px;
  }
  .head-stats h2{font-size:15px;font-weight:600;color:var(--brand-900);padding-bottom:14px;border-bottom:1px solid var(--line)}
  .stat-item{display:flex;align-items:baseline;justify-content:space-between;gap:12px;padding:14px 0;border-bottom:1px dashed var(--line)}
  .stat-item:last-child{border-bottom:0;padding-bottom:0}
  .stat-num{font-size:24px;font-weight:700;color:var(--brand-600);font-variant-numeric:tabular-nums}
  .stat-num.green{color:var(--green)}
  .stat-label{font-size:13px;color:var(--muted)}

  /* ---------- ticker ---------- */
  .ticker{background:var(--surface);border-bottom:1px solid var(--line)}
  .ticker-inner{display:flex;align-items:center;gap:18px;padding:14px 32px;flex-wrap:wrap}
  .ticker-label{
    display:inline-flex;align-items:center;gap:8px;
    font-size:13px;font-weight:600;color:var(--accent);
    padding-right:18px;border-right:1px solid var(--line);flex:0 0 auto;
  }
  .ticker-list{display:flex;flex:1 1 320px;flex-wrap:wrap;gap:10px 28px;font-size:14px;color:var(--ink)}
  .ticker-list li{display:flex;align-items:center;gap:10px;min-width:0}
  .ticker-time{font-size:13px;color:var(--green);font-variant-numeric:tabular-nums;font-weight:600}
  .ticker-more{font-size:13px;font-weight:600;color:var(--brand-600);display:inline-flex;align-items:center;gap:6px;flex:0 0 auto}
  .ticker-more:hover{text-decoration:underline;text-underline-offset:4px}
  .ticker-more i{transition:transform .18s ease-out}
  .ticker-more:hover i{transform:translateX(3px)}

  /* ---------- sections ---------- */
  .section{padding:96px 0}
  .section-white{background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
  .section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:34px;flex-wrap:wrap}
  .section-head h2{font-size:24px;line-height:32px;font-weight:700;color:var(--brand-900);position:relative;padding-left:16px}
  .section-head h2::before{
    content:"";position:absolute;left:0;top:.3em;bottom:.3em;width:4px;border-radius:3px;background:var(--brand-600);
  }
  .section-desc{font-size:15px;line-height:1.75;color:var(--muted);margin-top:10px;max-width:62ch}
  .section-link{font-size:14px;font-weight:600;color:var(--brand-600);display:inline-flex;align-items:center;gap:6px}
  .section-link:hover{text-decoration:underline;text-underline-offset:4px}

  .filter-row{display:flex;flex-wrap:wrap;gap:8px}
  .chip{
    padding:7px 16px;border-radius:999px;border:1px solid var(--line);background:#fff;
    font-size:14px;color:var(--muted);cursor:pointer;transition:.18s ease-out;
  }
  .chip:hover{border-color:var(--brand-600);color:var(--brand-600)}
  .chip.is-active{background:var(--brand-600);border-color:var(--brand-600);color:#fff;font-weight:600}

  /* ---------- timeline ---------- */
  .timeline{position:relative;padding-top:6px}
  .timeline::before{
    content:"";position:absolute;left:11px;top:0;bottom:0;width:3px;
    background:var(--line);border-radius:3px;
  }
  .tl-item{position:relative;padding-left:46px;margin-bottom:20px}
  .tl-item:last-child{margin-bottom:0}
  .tl-dot{
    position:absolute;left:5px;top:24px;width:15px;height:15px;border-radius:50%;
    background:#fff;border:3px solid var(--brand-600);box-shadow:0 0 0 4px var(--bg);
  }
  .tl-card{
    background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
    box-shadow:var(--shadow-card);padding:20px 22px;
    transition:transform .22s ease-out,box-shadow .22s ease-out,border-color .22s ease-out;
  }
  .tl-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:#d3e0f2}
  .tl-meta{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
  .tl-date{font-size:13px;font-weight:600;color:var(--green);font-variant-numeric:tabular-nums;display:inline-flex;align-items:center;gap:6px}
  .tl-title{font-size:18px;line-height:26px;font-weight:600;margin-top:10px;color:var(--brand-900)}
  .tl-title a:hover{color:var(--brand-600);text-decoration:underline;text-underline-offset:4px}
  .tl-text{font-size:15px;line-height:1.85;color:var(--muted);margin-top:8px}
  .tl-foot{display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;margin-top:14px;padding-top:14px;border-top:1px solid var(--line)}
  .tl-source{font-size:13px;color:var(--muted)}
  .empty-note{font-size:14px;color:var(--muted);padding:18px 0}

  /* ---------- media cards ---------- */
  .grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
  .media-card{
    background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
    overflow:hidden;box-shadow:var(--shadow-card);
    transition:transform .22s ease-out,box-shadow .22s ease-out;
  }
  .media-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}
  .media-card img{width:100%;height:190px;object-fit:cover;border-radius:12px 12px 0 0;background:var(--brand-100)}
  .media-body{padding:20px 22px 24px}
  .media-body h3{font-size:18px;line-height:1.5;font-weight:600;margin-top:12px;color:var(--brand-900)}
  .media-body p{font-size:15px;line-height:1.8;color:var(--muted);margin-top:10px}
  .media-link{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--brand-600);margin-top:14px}
  .media-link i{transition:transform .18s ease-out}
  .media-card:hover .media-link i{transform:translateX(3px)}

  /* ---------- steps ---------- */
  .steps{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
  .steps li{
    position:relative;background:var(--surface);border:1px solid var(--line);
    border-radius:var(--radius-card);box-shadow:var(--shadow-card);padding:26px 24px;
    transition:transform .22s ease-out,box-shadow .22s ease-out;
  }
  .steps li:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}
  .step-num{
    display:inline-flex;align-items:center;justify-content:center;
    width:38px;height:38px;border-radius:10px;background:var(--accent-soft);
    color:var(--accent);font-size:14px;font-weight:700;font-variant-numeric:tabular-nums;
  }
  .steps h3{font-size:17px;line-height:1.55;font-weight:600;margin-top:16px;color:var(--brand-900)}
  .steps p{font-size:15px;line-height:1.8;color:var(--muted);margin-top:10px}

  /* ---------- related categories ---------- */
  .cat-links{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
  .cat-link{
    display:flex;flex-direction:column;gap:8px;
    background:var(--surface);border:1px solid var(--line);border-radius:14px;
    padding:22px;box-shadow:var(--shadow-card);
    transition:transform .22s ease-out,box-shadow .22s ease-out,border-color .22s ease-out;
  }
  .cat-link strong{font-size:17px;font-weight:600;color:var(--brand-900);display:flex;align-items:center;gap:8px}
  .cat-link strong i{font-size:13px;color:var(--accent)}
  .cat-link span{font-size:14px;line-height:1.75;color:var(--muted)}
  .cat-link em{font-size:13px;font-style:normal;font-weight:600;color:var(--brand-600);margin-top:4px;display:inline-flex;align-items:center;gap:6px}
  .cat-link:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:#d3e0f2}

  /* ---------- FAQ ---------- */
  .faq-grid{display:grid;grid-template-columns:5fr 7fr;gap:40px;align-items:start}
  .faq-side h2{font-size:24px;line-height:32px;font-weight:700;color:var(--brand-900)}
  .faq-side p{font-size:15px;line-height:1.85;color:var(--muted);margin-top:12px;max-width:34ch}
  .faq-side .faq-icon{
    width:52px;height:52px;border-radius:14px;background:var(--brand-100);color:var(--brand-600);
    display:inline-flex;align-items:center;justify-content:center;font-size:20px;margin-bottom:18px;
  }
  .faq-item{
    position:relative;background:var(--surface);border:1px solid var(--line);
    border-radius:14px;overflow:hidden;margin-bottom:12px;
  }
  .faq-item::before{
    content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--brand-600);
    transform:scaleY(0);transform-origin:top;transition:transform .2s ease-out;
  }
  .faq-item.open::before{transform:scaleY(1)}
  .faq-q{
    width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
    padding:18px 20px;font-size:16px;font-weight:600;color:var(--ink);
    text-align:left;cursor:pointer;
  }
  .faq-q .sign{
    flex:0 0 auto;width:26px;height:26px;border-radius:8px;border:1px solid var(--line);
    display:inline-flex;align-items:center;justify-content:center;
    font-size:13px;color:var(--brand-600);transition:.18s ease-out;
  }
  .faq-item.open .faq-q .sign{background:var(--accent-soft);border-color:var(--accent);color:var(--accent)}
  .faq-a{max-height:0;overflow:hidden;transition:max-height .22s ease-out}
  .faq-a-inner{padding:0 20px 18px;font-size:15px;line-height:1.85;color:var(--muted)}

  /* ---------- CTA ---------- */
  .cta-band{
    background:var(--brand-100);border:1px solid #d5e3f6;border-radius:var(--radius-card);
    padding:34px 36px;display:grid;grid-template-columns:1.25fr 1fr;gap:34px;align-items:center;
  }
  .cta-band h2{font-size:22px;line-height:1.5;font-weight:700;color:var(--brand-900)}
  .cta-band p{font-size:15px;line-height:1.85;color:var(--muted);margin-top:10px}
  .cta-tools{display:flex;gap:10px;margin-top:18px;flex-wrap:wrap}
  .subscribe-form{display:flex;flex-direction:column;gap:14px}
  .field{display:flex;flex-direction:column;gap:6px}
  .field label{font-size:13px;color:var(--muted)}
  .field input,.field select{
    height:48px;padding:0 14px;border-radius:var(--radius-btn);
    border:1px solid var(--line);background:#fff;color:var(--ink);font-size:15px;
    transition:border-color .18s ease-out,box-shadow .18s ease-out;
  }
  .field input:focus,.field select:focus{
    outline:none;border-color:var(--brand-600);
    box-shadow:0 0 0 3px var(--brand-100);
  }
  .form-tip{font-size:13px;color:var(--green);min-height:20px}
  .form-row{display:flex;gap:12px}
  .form-row > *{flex:1 1 0;min-width:0}

  /* ---------- footer ---------- */
  .site-footer{background:var(--brand-900);color:#fff;padding-top:64px}
  .footer-grid{
    display:grid;grid-template-columns:1.6fr 1fr 1fr 1.4fr;gap:40px;
    padding-bottom:44px;border-bottom:1px solid rgba(255,255,255,.12);
  }
  .footer-brand{display:inline-flex;align-items:center;gap:10px;font-size:18px;font-weight:700;color:#fff}
  .footer-brand:hover{color:#fff}
  .footer-desc{font-size:14px;line-height:1.85;color:rgba(255,255,255,.72);margin-top:16px;max-width:38ch}
  .footer-stats{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}
  .footer-chip{
    font-size:12px;padding:4px 10px;border-radius:999px;
    background:rgba(255,255,255,.1);color:rgba(255,255,255,.85);
  }
  .footer-col h3{position:relative;font-size:14px;font-weight:600;color:#fff;padding-top:14px;margin-bottom:16px}
  .footer-col h3::before{content:"";position:absolute;top:0;left:0;width:26px;height:2px;background:var(--accent);border-radius:2px}
  .footer-col ul li{margin-bottom:10px;font-size:14px;color:rgba(255,255,255,.75);line-height:1.75}
  .footer-col a:hover,.footer-bottom a:hover{color:var(--brand-100);text-decoration:underline;text-underline-offset:4px}
  .footer-contact b{color:#fff;font-weight:600}
  .footer-bottom{
    display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
    padding:22px 0 30px;font-size:13px;color:rgba(255,255,255,.6);
  }

  /* ---------- responsive ---------- */
  @media (max-width:1279px){
    .wrap{padding:0 28px}
  }
  @media (max-width:1023px){
    .wrap{padding:0 24px}
    .nav-side{display:none}
    .burger{display:flex}
    .nav-bar{min-height:70px}
    .section{padding:72px 0}
    .head-grid{grid-template-columns:1fr;gap:28px}
    .page-head{padding-bottom:44px}
    .page-head h1{font-size:28px;line-height:1.45}
    .grid-3{grid-template-columns:repeat(2,1fr)}
    .grid-3 > :last-child:nth-child(odd){grid-column:1 / -1}
    .steps{grid-template-columns:repeat(2,1fr)}
    .steps li:last-child{grid-column:1 / -1}
    .cat-links{grid-template-columns:1fr}
    .faq-grid{grid-template-columns:1fr;gap:26px}
    .cta-band{grid-template-columns:1fr;padding:28px}
    .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
    .ticker-inner{padding:14px 24px}
  }
  @media (max-width:640px){
    .wrap{padding:0 20px}
    .section{padding:56px 0}
    .page-head h1{font-size:26px;line-height:1.5}
    .lead{font-size:15px}
    .grid-3{grid-template-columns:1fr;gap:20px}
    .grid-3 > :last-child:nth-child(odd){grid-column:auto}
    .steps{grid-template-columns:1fr;gap:18px}
    .steps li:last-child{grid-column:auto}
    .section-head{margin-bottom:24px}
    .timeline::before{left:6px}
    .tl-item{padding-left:30px}
    .tl-dot{left:0;width:13px;height:13px}
    .tl-card{padding:18px}
    .tl-title{font-size:16px;line-height:1.6}
    .ticker-inner{padding:12px 20px;gap:12px}
    .ticker-label{border-right:0;padding-right:0}
    .ticker-list{flex-direction:column;gap:8px}
    .form-row{flex-direction:column}
    .cta-band{padding:24px 20px}
    .footer-grid{grid-template-columns:1fr;gap:28px}
    .footer-bottom{flex-direction:column;gap:8px}
    .btn{width:100%}
    .head-actions .btn{width:100%}
    .cta-tools .btn-icon{width:44px;height:44px}
  }

/* roulang page: category2 */
:root{
  --brand-900:#10233F;
  --brand-700:#17427F;
  --brand-600:#1D4E9E;
  --brand-500:#2C6BC4;
  --brand-100:#E4EDF9;
  --accent:#F26419;
  --accent-soft:#FFF0E6;
  --green:#17A06A;
  --bg:#F4F7FC;
  --surface:#FFFFFF;
  --ink:#16202E;
  --muted:#5B6B80;
  --line:#E3EAF3;
  --radius-card:16px;
  --radius-btn:10px;
  --shadow-card:0 1px 2px rgba(22,32,46,.04), 0 10px 26px -14px rgba(29,78,158,.22);
  --shadow-hover:0 2px 4px rgba(22,32,46,.06), 0 18px 38px -16px rgba(29,78,158,.30);
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
html body{
  margin:0;
  padding:0;
  background:var(--bg);
  color:var(--ink);
  font-family:"PingFang SC","HarmonyOS Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,sans-serif;
  font-size:16px;
  line-height:1.9;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;height:auto;}
a{color:inherit;text-decoration:none;}
button{font-family:inherit;cursor:pointer;border:0;background:none;}
input{font-family:inherit;}
.wrap{max-width:1200px;margin:0 auto;padding:0 32px;}
.num{font-variant-numeric:tabular-nums;}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(255,255,255,.95);
  -webkit-backdrop-filter:saturate(180%) blur(10px);
  backdrop-filter:saturate(180%) blur(10px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .22s ease-out;
}
.site-header.scrolled{box-shadow:0 6px 22px -14px rgba(29,78,158,.35);}
.nav-bar{
  display:flex;align-items:center;justify-content:space-between;
  gap:14px;min-height:78px;
}
.nav-side{display:flex;align-items:center;gap:4px;flex:1 1 0;min-width:0;}
.nav-side.left{justify-content:flex-start;}
.nav-side.right{justify-content:flex-end;gap:10px;}
.nav-link{
  position:relative;display:inline-flex;align-items:center;
  padding:9px 13px;border-radius:9px;
  font-size:15px;color:var(--muted);white-space:nowrap;
  transition:color .2s ease-out,background-color .2s ease-out;
}
.nav-link:hover{color:var(--brand-600);background:var(--brand-100);}
.nav-link.active{color:var(--brand-600);font-weight:600;}
.nav-link.active::after{
  content:"";position:absolute;left:13px;right:13px;bottom:2px;height:2px;
  background:var(--brand-600);border-radius:2px;
}
.logo{
  display:inline-flex;align-items:center;gap:10px;
  padding:6px 10px;border-radius:12px;
  transition:background-color .2s ease-out;
}
.logo:hover{background:var(--brand-100);}
.logo-mark{
  position:relative;width:24px;height:24px;border-radius:7px;
  background:linear-gradient(135deg,var(--brand-600),var(--brand-700));
  flex:0 0 auto;
}
.logo-mark::after{
  content:"";position:absolute;right:-3px;bottom:-3px;width:10px;height:10px;
  background:var(--accent);border-radius:3px;border:2px solid #fff;
}
.logo-text{display:flex;flex-direction:column;line-height:1.15;}
.logo-text > span:first-child{font-size:19px;font-weight:700;letter-spacing:.4px;color:var(--brand-900);}
.logo-sub{font-size:11px;color:var(--muted);letter-spacing:2px;font-weight:400;}
.burger{
  display:none;width:44px;height:44px;border-radius:10px;
  border:1px solid var(--line);background:#fff;
  flex-direction:column;align-items:center;justify-content:center;gap:5px;
  transition:border-color .2s ease-out;
}
.burger:hover{border-color:var(--brand-600);}
.burger i{display:block;width:18px;height:2px;background:var(--brand-900);border-radius:2px;transition:background-color .2s ease-out;}
.burger:hover i{background:var(--brand-600);}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;letter-spacing:.3px;
  transition:background-color .2s ease-out,color .2s ease-out,border-color .2s ease-out,transform .2s ease-out,box-shadow .2s ease-out;
}
.btn-primary{background:var(--brand-600);color:#fff;box-shadow:0 8px 18px -12px rgba(29,78,158,.75);}
.btn-primary:hover{background:var(--brand-700);transform:translateY(-1px);}
.btn-outline{border:1px solid var(--brand-600);color:var(--brand-600);background:#fff;}
.btn-outline:hover{background:var(--brand-100);}
.btn-accent{background:var(--accent);color:#fff;box-shadow:0 8px 18px -12px rgba(242,100,25,.8);}
.btn-accent:hover{background:#d9550f;transform:translateY(-1px);}
.btn-sm{height:40px;padding:0 16px;font-size:14px;}
.btn-block{width:100%;}
.btn:focus-visible,a:focus-visible,button:focus-visible,input:focus-visible{
  outline:2px solid var(--brand-600);outline-offset:2px;
}
.icon-btn{
  width:40px;height:40px;border-radius:10px;border:1px solid var(--line);background:#fff;
  display:inline-flex;align-items:center;justify-content:center;color:var(--brand-600);
  transition:background-color .2s ease-out,box-shadow .2s ease-out,transform .2s ease-out;
}
.icon-btn:hover{background:var(--brand-100);box-shadow:var(--shadow-card);transform:translateY(-2px);}

/* ---------- Badges / dividers ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;border-radius:999px;font-size:12px;font-weight:600;letter-spacing:.4px;
}
.badge-brand{background:var(--brand-100);color:var(--brand-700);}
.badge-accent{background:var(--accent-soft);color:var(--accent);}
.badge-outline{border:1px solid var(--line);color:var(--muted);background:#fff;}
.dot-green{width:7px;height:7px;border-radius:50%;background:var(--green);display:inline-block;}
.section-line{
  display:flex;align-items:center;gap:12px;margin-bottom:34px;
  padding-top:6px;
}
.section-line::before{content:"";width:28px;height:3px;border-radius:2px;background:var(--accent);}
.section-line .line{flex:1;height:1px;background:var(--line);}

/* ---------- Breadcrumb ---------- */
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;color:var(--muted);padding:18px 0 6px;
}
.breadcrumb .sep{color:#B9C6D8;}
.breadcrumb .current{color:var(--ink);font-weight:600;}

/* ---------- Category head ---------- */
.cat-head{
  padding:6px 0 34px;
  border-bottom:1px solid var(--line);
}
.cat-head h1{
  font-size:33px;line-height:1.35;font-weight:700;margin:16px 0 14px;color:var(--brand-900);
  letter-spacing:.2px;
}
.cat-head .lead{
  font-size:16px;color:var(--muted);max-width:820px;margin:0 0 24px;line-height:1.85;
}
.cat-facts{display:flex;flex-wrap:wrap;gap:14px;}
.fact{
  display:flex;flex-direction:column;gap:2px;min-width:132px;
  padding:12px 18px;background:var(--surface);border:1px solid var(--line);border-radius:14px;
  box-shadow:var(--shadow-card);
}
.fact b{font-size:22px;font-weight:700;color:var(--brand-600);line-height:1.3;font-variant-numeric:tabular-nums;}
.fact span{font-size:13px;color:var(--muted);}

/* ---------- Layout ---------- */
.layout{
  display:grid;grid-template-columns:240px minmax(0,1fr);gap:44px;
  align-items:start;padding:44px 0 20px;
}
.toc{
  position:sticky;top:104px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  box-shadow:var(--shadow-card);padding:20px 18px;
}
.toc-title{
  font-size:13px;font-weight:600;letter-spacing:1px;color:var(--muted);
  padding-bottom:12px;margin-bottom:8px;border-bottom:1px solid var(--line);
}
.toc-link{
  display:block;padding:9px 12px;border-radius:9px;font-size:14px;color:var(--muted);
  border-left:2px solid transparent;
  transition:color .2s ease-out,background-color .2s ease-out,border-color .2s ease-out;
}
.toc-link:hover{color:var(--brand-600);background:var(--brand-100);}
.toc-link.active{color:var(--brand-600);font-weight:600;background:var(--brand-100);border-left-color:var(--brand-600);}
.toc-note{margin-top:14px;padding-top:14px;border-top:1px dashed var(--line);font-size:13px;color:var(--muted);line-height:1.8;}

/* ---------- Blocks ---------- */
.block{padding:8px 0 56px;}
.block:last-child{padding-bottom:24px;}
.block-title{font-size:23px;font-weight:700;color:var(--brand-900);margin:0 0 10px;line-height:1.4;}
.block-sub{font-size:14.5px;color:var(--muted);margin:0 0 26px;max-width:760px;}
.prose p{font-size:16px;line-height:1.95;color:var(--ink);margin:0 0 16px;}
.prose p.dim{color:var(--muted);font-size:15px;}

.overview{
  display:grid;grid-template-columns:1.15fr .85fr;gap:28px;align-items:center;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  box-shadow:var(--shadow-card);padding:26px;
}
.overview figure{margin:0;border-radius:12px;overflow:hidden;position:relative;background:var(--brand-100);}
.overview figure img{width:100%;height:230px;object-fit:cover;border-radius:12px;}
.overview figcaption{font-size:12.5px;color:var(--muted);margin-top:8px;text-align:center;}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px;}

/* ---------- Topic grid ---------- */
.topic-grid{
  display:grid;grid-template-columns:repeat(2,minmax(0,1fr));
  border-top:1px dashed var(--line);
}
.topic-card{
  padding:24px 24px 24px 0;border-bottom:1px dashed var(--line);
  display:flex;gap:16px;align-items:flex-start;
  transition:transform .2s ease-out;
}
.topic-card:nth-child(odd){padding-right:28px;border-right:1px dashed var(--line);}
.topic-card:nth-child(even){padding-left:28px;}
.topic-card:hover{transform:translateY(-2px);}
.topic-thumb{
  width:64px;height:64px;flex:0 0 auto;border-radius:12px;overflow:hidden;
  background:var(--brand-100);border:1px solid var(--line);
}
.topic-thumb img{width:100%;height:100%;object-fit:cover;}
.topic-body{min-width:0;}
.topic-body h3{
  font-size:17.5px;font-weight:600;color:var(--brand-900);margin:0 0 8px;line-height:1.5;
  transition:color .2s ease-out;
}
.topic-card:hover .topic-body h3{color:var(--brand-600);}
.topic-body p{font-size:14.5px;color:var(--muted);margin:0 0 12px;line-height:1.8;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;}
.topic-more{
  display:inline-flex;align-items:center;gap:6px;font-size:13.5px;font-weight:600;color:var(--brand-600);
}
.topic-more .arrow{transition:transform .2s ease-out;}
.topic-card:hover .topic-more .arrow{transform:translateX(3px);}
.topic-card.feature{
  grid-column:1 / -1;flex-direction:column;gap:0;
  padding:0 0 28px;border-bottom:1px dashed var(--line);border-right:0;
}
.topic-card.feature .topic-media{
  width:100%;border-radius:12px;overflow:hidden;margin-bottom:20px;background:var(--brand-100);
}
.topic-card.feature .topic-media img{width:100%;height:280px;object-fit:cover;border-radius:12px;}
.topic-card.feature .feature-inner{display:flex;gap:20px;align-items:flex-start;}
.topic-card.feature .topic-thumb{width:56px;height:56px;}

/* ---------- Steps ---------- */
.steps{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px;}
.step{
  background:var(--surface);border:1px solid var(--line);border-radius:14px;
  box-shadow:var(--shadow-card);padding:20px 18px;
  transition:transform .2s ease-out,box-shadow .2s ease-out;
}
.step:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);}
.step-num{
  font-size:13px;font-weight:700;color:var(--accent);letter-spacing:1px;
  font-variant-numeric:tabular-nums;margin-bottom:10px;display:block;
}
.step h3{font-size:16px;font-weight:600;margin:0 0 8px;color:var(--brand-900);}
.step p{font-size:14px;color:var(--muted);margin:0;line-height:1.8;}

/* ---------- Rhythm list ---------- */
.rhythm{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  box-shadow:var(--shadow-card);overflow:hidden;
}
.rhythm-row{
  display:grid;grid-template-columns:180px minmax(0,1fr) 130px;gap:18px;align-items:center;
  padding:18px 22px;border-bottom:1px solid var(--line);
}
.rhythm-row:last-child{border-bottom:0;}
.rhythm-row:hover{background:#FAFCFF;}
.rhythm-row .r-time{font-size:14px;font-weight:600;color:var(--brand-700);font-variant-numeric:tabular-nums;}
.rhythm-row .r-text{font-size:14.5px;color:var(--muted);}
.rhythm-row .r-state{font-size:13px;color:var(--green);display:inline-flex;align-items:center;gap:6px;justify-content:flex-end;}

/* ---------- Cross links ---------- */
.cross{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;}
.cross-card{
  display:flex;flex-direction:column;gap:10px;
  background:var(--surface);border:1px solid var(--line);border-radius:14px;
  box-shadow:var(--shadow-card);padding:20px;
  transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;
}
.cross-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:var(--brand-500);}
.cross-card h3{font-size:17px;font-weight:600;margin:0;color:var(--brand-900);}
.cross-card p{font-size:14px;color:var(--muted);margin:0;line-height:1.8;}
.cross-card .go{font-size:13.5px;font-weight:600;color:var(--brand-600);margin-top:auto;}

/* ---------- FAQ ---------- */
.faq-wrap{display:grid;grid-template-columns:5fr 7fr;gap:36px;align-items:start;}
.faq-intro h2{font-size:23px;font-weight:700;color:var(--brand-900);margin:0 0 12px;}
.faq-intro p{font-size:14.5px;color:var(--muted);margin:0 0 18px;line-height:1.85;}
.faq-icon{
  width:48px;height:48px;border-radius:14px;background:var(--brand-100);color:var(--brand-600);
  display:flex;align-items:center;justify-content:center;font-size:20px;font-weight:700;
}
.faq-item{
  background:var(--surface);border:1px solid var(--line);border-radius:14px;
  margin-bottom:12px;overflow:hidden;position:relative;
  transition:border-color .2s ease-out,box-shadow .2s ease-out;
}
.faq-item.open{border-color:var(--brand-500);box-shadow:var(--shadow-card);}
.faq-item::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--brand-600);
  transform:scaleY(0);transform-origin:top;transition:transform .2s ease-out;
}
.faq-item.open::before{transform:scaleY(1);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:14px;
  padding:17px 20px;text-align:left;font-size:16px;font-weight:600;color:var(--brand-900);
}
.faq-q .sign{font-size:19px;font-weight:400;color:var(--muted);transition:color .2s ease-out;}
.faq-item.open .faq-q .sign{color:var(--accent);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .24s ease-out;}
.faq-a p{padding:0 20px 18px;margin:0;font-size:15px;line-height:1.85;color:var(--muted);}

/* ---------- CTA ---------- */
.cta-band{
  background:var(--brand-100);border-radius:var(--radius-card);
  padding:32px;display:grid;grid-template-columns:1.05fr .95fr;gap:28px;align-items:center;
}
.cta-band h2{font-size:22px;font-weight:700;color:var(--brand-900);margin:0 0 8px;}
.cta-band p{font-size:14.5px;color:#33456380;color:var(--muted);margin:0;line-height:1.85;}
.subscribe-form{display:flex;gap:10px;}
.subscribe-input{
  flex:1;height:48px;padding:0 16px;border-radius:var(--radius-btn);
  border:1px solid var(--line);background:#fff;font-size:15px;color:var(--ink);
  transition:border-color .2s ease-out,box-shadow .2s ease-out;
}
.subscribe-input::placeholder{color:#9AA9BC;}
.subscribe-input:focus{border-color:var(--brand-600);box-shadow:0 0 0 3px var(--brand-100);outline:none;}
.form-hint{font-size:12.5px;color:var(--muted);margin-top:10px;}
.form-msg{font-size:13px;color:var(--accent);margin-top:8px;min-height:18px;}

/* ---------- Footer ---------- */
.site-footer{background:var(--brand-900);color:#fff;margin-top:56px;padding:60px 0 26px;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:34px;}
.footer-brand{display:inline-flex;align-items:center;gap:10px;font-size:18px;font-weight:700;color:#fff;}
.footer-brand .logo-mark::after{border-color:var(--brand-900);}
.footer-desc{font-size:14px;line-height:1.85;color:#B9C8DC;margin:16px 0 18px;max-width:340px;}
.footer-stats{display:flex;flex-wrap:wrap;gap:8px;}
.footer-chip{
  font-size:12.5px;padding:4px 12px;border-radius:999px;
  background:rgba(255,255,255,.08);color:#D5E1F0;border:1px solid rgba(255,255,255,.12);
}
.footer-col h3{
  position:relative;font-size:14px;font-weight:600;color:#fff;margin:0 0 18px;padding-top:12px;
}
.footer-col h3::before{content:"";position:absolute;top:0;left:0;width:24px;height:2px;background:var(--accent);border-radius:2px;}
.footer-col ul{list-style:none;margin:0;padding:0;}
.footer-col li{margin-bottom:11px;}
.footer-col a{font-size:14px;color:#C3D2E6;transition:color .2s ease-out;}
.footer-col a:hover{color:#fff;text-decoration:underline;text-underline-offset:4px;}
.footer-contact li{font-size:13.5px;color:#C3D2E6;line-height:1.8;}
.footer-contact b{color:#fff;font-weight:600;}
.footer-bottom{
  margin-top:44px;padding-top:20px;border-top:1px solid rgba(255,255,255,.14);
  display:flex;flex-wrap:wrap;gap:10px 22px;justify-content:space-between;
  font-size:13px;color:#9FB2CA;
}
.footer-bottom a{color:#D5E1F0;}
.footer-bottom a:hover{color:#fff;text-decoration:underline;text-underline-offset:4px;}

/* ---------- Drawer ---------- */
.drawer-overlay{
  position:fixed;inset:0;background:rgba(16,35,63,.5);opacity:0;visibility:hidden;
  transition:opacity .22s ease-out,visibility .22s ease-out;z-index:90;
}
.drawer-overlay.show{opacity:1;visibility:visible;}
.drawer{
  position:fixed;top:0;right:0;height:100%;width:310px;max-width:86vw;background:#fff;z-index:95;
  transform:translateX(102%);transition:transform .24s ease-out;
  box-shadow:-18px 0 40px -22px rgba(16,35,63,.5);
  padding:22px 20px;overflow-y:auto;
}
.drawer.show{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px;}
.drawer-title{font-size:16px;font-weight:700;color:var(--brand-900);}
.drawer-close{
  width:40px;height:40px;border-radius:10px;border:1px solid var(--line);background:#fff;
  font-size:18px;color:var(--muted);display:flex;align-items:center;justify-content:center;
}
.drawer-close:hover{border-color:var(--brand-600);color:var(--brand-600);}
.drawer-label{font-size:12px;letter-spacing:1px;color:var(--muted);margin:18px 0 8px;}
.drawer a.drawer-link{
  display:flex;align-items:center;justify-content:space-between;
  min-height:48px;padding:0 14px;border-radius:10px;font-size:15px;color:var(--ink);
  border:1px solid var(--line);margin-bottom:10px;
  transition:background-color .2s ease-out,color .2s ease-out,border-color .2s ease-out;
}
.drawer a.drawer-link:hover{background:var(--brand-100);color:var(--brand-600);border-color:var(--brand-500);}
.drawer a.drawer-link.active{background:var(--brand-100);color:var(--brand-600);font-weight:600;border-color:var(--brand-500);}
.drawer .btn{margin-top:12px;}

/* ---------- Responsive ---------- */
@media (max-width:1180px){
  .steps{grid-template-columns:repeat(2,minmax(0,1fr));}
}
@media (max-width:1023px){
  .nav-side{display:none;}
  .burger{display:flex;}
  .nav-bar{justify-content:space-between;min-height:70px;}
  .logo{order:-1;}
  .wrap{padding:0 24px;}
  .layout{grid-template-columns:minmax(0,1fr);gap:32px;padding-top:34px;}
  .toc{position:static;}
  .faq-wrap{grid-template-columns:minmax(0,1fr);gap:24px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px;}
  .cta-band{grid-template-columns:minmax(0,1fr);}
  .overview{grid-template-columns:minmax(0,1fr);}
  .cat-head h1{font-size:29px;}
}
@media (max-width:767px){
  .topic-grid{grid-template-columns:minmax(0,1fr);}
  .topic-card:nth-child(odd){border-right:0;padding-right:0;}
  .topic-card:nth-child(even){padding-left:0;}
  .topic-card.feature .feature-inner{flex-direction:column;gap:14px;}
  .topic-card.feature .topic-media img{height:200px;}
  .cross{grid-template-columns:minmax(0,1fr);}
  .rhythm-row{grid-template-columns:minmax(0,1fr);gap:6px;}
  .rhythm-row .r-state{justify-content:flex-start;}
  .footer-grid{grid-template-columns:minmax(0,1fr);}
  .subscribe-form{flex-direction:column;}
  .subscribe-form .btn{width:100%;}
}
@media (max-width:560px){
  .wrap{padding:0 20px;}
  .cat-head h1{font-size:26px;}
  .block-title,.faq-intro h2{font-size:20px;}
  .steps{grid-template-columns:minmax(0,1fr);}
  .fact{flex:1 1 100%;}
  .cta-band{padding:24px 20px;}
  .site-footer{padding:44px 0 22px;}
}

/* roulang page: category3 */
:root{
    --brand-900:#10233F;
    --brand-700:#17427F;
    --brand-600:#1D4E9E;
    --brand-500:#2C6BC4;
    --brand-100:#E4EDF9;
    --accent:#F26419;
    --accent-soft:#FFF0E6;
    --green:#17A06A;
    --bg:#F4F7FC;
    --surface:#FFFFFF;
    --ink:#16202E;
    --muted:#5B6B80;
    --line:#E3EAF3;
    --radius-card:16px;
    --radius-btn:10px;
    --shadow-card:0 1px 2px rgba(22,32,46,.04), 0 10px 26px -14px rgba(29,78,158,.22);
    --shadow-hover:0 2px 4px rgba(22,32,46,.06), 0 18px 38px -16px rgba(29,78,158,.30);
    --font-site:"PingFang SC","HarmonyOS Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,sans-serif;
  }

  *{box-sizing:border-box}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
  body{
    margin:0;
    background:var(--bg);
    color:var(--ink);
    font-family:var(--font-site);
    font-size:16px;
    line-height:1.9;
    -webkit-font-smoothing:antialiased;
  }
  img{display:block;max-width:100%;height:auto}
  a{color:inherit;text-decoration:none}
  button,input,select,textarea{font:inherit;color:inherit}
  button{background:none;border:0;cursor:pointer}
  ul,ol{margin:0;padding:0;list-style:none}
  h1,h2,h3,h4{margin:0;line-height:1.4}
  p{margin:0}
  :focus-visible{outline:2px solid var(--brand-600);outline-offset:2px;border-radius:4px}

  .wrap{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
  .num{font-variant-numeric:tabular-nums}

  /* ---------- Header / Nav ---------- */
  .site-header{
    position:sticky;top:0;z-index:60;
    background:rgba(255,255,255,.95);
    backdrop-filter:saturate(160%) blur(8px);
    border-bottom:1px solid var(--line);
    transition:box-shadow .2s ease-out;
  }
  .site-header.is-scrolled{box-shadow:0 8px 24px -18px rgba(16,35,63,.55)}
  .nav-bar{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:18px;min-height:78px}
  .nav-side{display:flex;align-items:center;gap:24px}
  .nav-side.right{justify-content:flex-end}
  .nav-link{
    position:relative;font-size:15px;padding:8px 2px;color:var(--ink);
    transition:color .2s ease-out;white-space:nowrap;
  }
  .nav-link:hover{color:var(--brand-600)}
  .nav-link.active{color:var(--brand-600);font-weight:600}
  .nav-link.active::after{
    content:"";position:absolute;left:0;right:0;bottom:0;height:2px;
    background:var(--brand-600);border-radius:2px;
  }
  .logo{display:inline-flex;align-items:center;gap:10px;justify-self:center}
  .logo-mark{
    width:14px;height:14px;border-radius:4px;background:var(--accent);
    box-shadow:0 0 0 4px var(--accent-soft);flex:none;
  }
  .logo-text{display:flex;flex-direction:column;line-height:1.15}
  .logo-text > span:first-child{font-size:19px;font-weight:700;letter-spacing:.4px;color:var(--brand-900)}
  .logo-sub{font-size:11px;letter-spacing:2px;color:var(--muted);font-weight:400}

  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    height:46px;padding:0 20px;border-radius:var(--radius-btn);
    font-size:15px;font-weight:600;border:1px solid transparent;
    transition:background-color .2s ease-out,color .2s ease-out,transform .2s ease-out,box-shadow .2s ease-out;
    white-space:nowrap;
  }
  .btn-sm{height:40px;padding:0 16px;font-size:14px;border-radius:9px}
  .btn-primary{background:var(--brand-600);color:#fff;box-shadow:0 8px 20px -14px rgba(29,78,158,.9)}
  .btn-primary:hover{background:var(--brand-700);transform:translateY(-1px)}
  .btn-outline{background:#fff;border-color:var(--brand-600);color:var(--brand-600)}
  .btn-outline:hover{background:var(--brand-100)}
  .btn-accent{background:var(--accent);color:#fff;box-shadow:0 10px 22px -16px rgba(242,100,25,.95)}
  .btn-accent:hover{background:#DD5612;transform:translateY(-1px)}
  .btn-block{width:100%}

  .burger{
    display:none;flex-direction:column;justify-content:center;gap:5px;
    width:44px;height:44px;border-radius:10px;border:1px solid var(--line);
    background:#fff;align-items:center;padding:0;
  }
  .burger i{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px;transition:background-color .2s ease-out}
  .burger:hover i{background:var(--brand-600)}

  /* ---------- Mobile drawer ---------- */
  .drawer-mask{
    position:fixed;inset:0;background:#10233F;z-index:70;
    opacity:0;visibility:hidden;transition:opacity .2s ease-out,visibility .2s ease-out;
  }
  .drawer-mask.open{opacity:.5;visibility:visible}
  .drawer{
    position:fixed;top:0;right:0;height:100%;width:min(86vw,340px);z-index:80;
    background:#fff;padding:22px;overflow-y:auto;
    transform:translateX(102%);transition:transform .22s ease-out;
    box-shadow:-12px 0 34px -22px rgba(16,35,63,.6);
  }
  .drawer.open{transform:translateX(0)}
  .drawer h3{font-size:13px;letter-spacing:2px;color:var(--muted);font-weight:600;margin-bottom:8px}
  .drawer-link{
    display:flex;align-items:center;justify-content:space-between;
    min-height:48px;border-bottom:1px solid var(--line);font-size:15.5px;
  }
  .drawer-link:hover{color:var(--brand-600)}
  .drawer-link.active{color:var(--brand-600);font-weight:600}
  .drawer-close{
    width:44px;height:44px;border-radius:10px;border:1px solid var(--line);
    display:inline-flex;align-items:center;justify-content:center;font-size:16px;color:var(--muted);
    margin-bottom:8px;
  }
  .drawer-close:hover{background:var(--brand-100);color:var(--brand-600)}

  /* ---------- Page head ---------- */
  .crumb{
    display:flex;align-items:center;gap:8px;flex-wrap:wrap;
    font-size:13px;color:var(--muted);padding:18px 0 14px;
  }
  .crumb a:hover{color:var(--brand-600);text-decoration:underline;text-underline-offset:4px}
  .crumb .sep{color:#B9C6D8}
  .crumb .cur{color:var(--ink)}

  .page-head{padding:6px 0 44px}
  .tagline{
    display:inline-flex;align-items:center;gap:8px;
    font-size:12px;font-weight:600;letter-spacing:1px;
    color:var(--brand-700);background:var(--brand-100);
    border-radius:999px;padding:6px 13px;
  }
  .page-head h1{
    font-size:clamp(26px,3.4vw,34px);font-weight:700;letter-spacing:-.3px;
    margin:16px 0 14px;max-width:900px;
  }
  .page-head .lede{font-size:16px;color:var(--muted);max-width:780px;line-height:1.85}

  /* ---------- Sections ---------- */
  .section{padding:56px 0;border-top:1px solid var(--line)}
  .section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:26px}
  .section-head h2{font-size:24px;font-weight:700;margin-bottom:8px}
  .section-head .sub{font-size:15px;color:var(--muted);max-width:640px}
  .eyebrow{
    display:block;font-size:12px;font-weight:700;letter-spacing:2px;
    color:var(--accent);margin-bottom:10px;
  }
  .link-more{font-size:14px;color:var(--brand-600);font-weight:600;white-space:nowrap}
  .link-more:hover{text-decoration:underline;text-underline-offset:4px}

  /* ---------- Icon matrix ---------- */
  .icon-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
  .icon-tile{
    background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
    padding:22px;box-shadow:var(--shadow-card);
    transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;
  }
  .icon-tile:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:#D5E2F3}
  .icon-box{
    width:48px;height:48px;border-radius:14px;background:var(--brand-100);
    color:var(--brand-600);display:flex;align-items:center;justify-content:center;
    font-size:19px;margin-bottom:14px;
  }
  .icon-tile h3{font-size:17px;font-weight:600;margin-bottom:8px;display:flex;align-items:baseline;gap:8px}
  .icon-tile h3 .idx{font-size:12px;font-weight:700;color:var(--accent)}
  .icon-tile p{font-size:14.5px;color:var(--muted);line-height:1.75}

  .cover-strip{
    position:relative;margin-top:24px;border-radius:var(--radius-card);
    overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow-card);
  }
  .cover-strip img{width:100%;height:230px;object-fit:cover}
  .cover-strip .strip-text{
    position:absolute;left:0;right:0;bottom:0;padding:26px 26px 22px;color:#fff;
    background:linear-gradient(180deg,rgba(16,35,63,0) 0%,rgba(16,35,63,.84) 100%);
  }
  .cover-strip .strip-text strong{display:block;font-size:18px;font-weight:700;margin-bottom:6px}
  .cover-strip .strip-text span{font-size:14px;color:rgba(255,255,255,.8)}

  /* ---------- Entry cards ---------- */
  .entry-list{display:grid;gap:20px}
  .entry-card{
    display:grid;grid-template-columns:56px 1fr auto;gap:22px;align-items:center;
    background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
    padding:24px;box-shadow:var(--shadow-card);
    transition:transform .2s ease-out,box-shadow .2s ease-out;
  }
  .entry-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}
  .entry-idx{
    width:56px;height:56px;border-radius:14px;background:var(--brand-100);color:var(--brand-600);
    display:flex;align-items:center;justify-content:center;font-size:20px;font-weight:700;
  }
  .entry-card h3{font-size:18px;font-weight:600;margin-bottom:6px}
  .entry-card .desc{font-size:14.5px;color:var(--muted);line-height:1.75;max-width:560px}
  .points{display:grid;gap:8px;margin-top:12px}
  .points li{position:relative;padding-left:16px;font-size:14px;color:var(--muted);line-height:1.7}
  .points li::before{
    content:"";position:absolute;left:0;top:.66em;width:7px;height:7px;
    border-radius:2px;background:var(--accent);
  }
  .entry-card .entry-cta{justify-self:end}

  /* ---------- Compare ---------- */
  .compare{
    display:grid;grid-template-columns:1fr 1fr;
    background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
    overflow:hidden;box-shadow:var(--shadow-card);
  }
  .compare > div{padding:28px}
  .compare > div:first-child{border-right:1px solid var(--line)}
  .compare h3{font-size:18px;font-weight:600;margin-bottom:6px;display:flex;align-items:center;gap:9px}
  .compare h3 i{font-size:15px;color:var(--brand-600)}
  .compare .head-note{font-size:13.5px;color:var(--muted);margin-bottom:18px}
  .compare ul{display:grid;gap:13px}
  .compare li{display:flex;gap:11px;font-size:15px;color:var(--muted);line-height:1.75}
  .compare .dot{flex:none;width:9px;height:9px;border-radius:50%;background:var(--green);margin-top:.66em}
  .compare .dot.warn{background:var(--accent)}

  /* ---------- Related ---------- */
  .rel-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
  .rel-card{
    display:block;background:var(--surface);border:1px solid var(--line);
    border-radius:var(--radius-card);overflow:hidden;box-shadow:var(--shadow-card);
    transition:transform .2s ease-out,box-shadow .2s ease-out;
  }
  .rel-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}
  .rel-card img{width:100%;height:152px;object-fit:cover}
  .rel-body{padding:20px}
  .rel-body h3{font-size:17px;font-weight:600;margin:10px 0 8px;transition:color .2s ease-out}
  .rel-card:hover .rel-body h3{color:var(--brand-600)}
  .rel-body p{font-size:14.5px;color:var(--muted);line-height:1.75}
  .rel-arrow{
    display:inline-flex;align-items:center;gap:6px;margin-top:14px;
    font-size:14px;font-weight:600;color:var(--brand-600);
  }
  .rel-arrow i{transition:transform .2s ease-out}
  .rel-card:hover .rel-arrow i{transform:translateX(3px)}

  .badge{
    display:inline-flex;align-items:center;gap:6px;
    font-size:12.5px;font-weight:600;border-radius:999px;padding:4px 11px;
    background:var(--brand-100);color:var(--brand-700);
  }
  .badge-accent{background:var(--accent-soft);color:var(--accent)}
  .badge-green{background:transparent;color:var(--green);padding-left:0}
  .dot-live{width:7px;height:7px;border-radius:50%;background:var(--green);display:inline-block}

  /* ---------- FAQ ---------- */
  .faq-layout{display:grid;grid-template-columns:5fr 7fr;gap:40px;align-items:start}
  .faq-intro h2{font-size:24px;font-weight:700;margin-bottom:10px}
  .faq-intro p{font-size:15px;color:var(--muted);line-height:1.85;max-width:340px}
  .faq-intro .icon-box{margin-bottom:16px}
  .faq-item{
    background:var(--surface);border:1px solid var(--line);border-left:3px solid transparent;
    border-radius:14px;margin-bottom:14px;overflow:hidden;
    transition:border-color .2s ease-out,box-shadow .2s ease-out;
  }
  .faq-item:hover{box-shadow:var(--shadow-card)}
  .faq-item.open{border-left-color:var(--brand-600)}
  .faq-q{
    width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
    padding:18px 20px;text-align:left;font-size:16px;font-weight:600;line-height:1.6;
  }
  .faq-q .sign{flex:none;font-size:17px;color:var(--muted);transition:color .2s ease-out}
  .faq-item.open .faq-q .sign{color:var(--accent)}
  .faq-a{max-height:0;overflow:hidden;transition:max-height .22s ease-out}
  .faq-a p{padding:0 20px 20px;font-size:15px;color:var(--muted);line-height:1.85}

  /* ---------- CTA / subscribe ---------- */
  .cta-band{
    background:var(--brand-100);border-radius:var(--radius-card);
    padding:34px;display:grid;grid-template-columns:1.05fr 1fr;gap:34px;align-items:center;
  }
  .cta-band h2{font-size:24px;font-weight:700;margin-bottom:12px}
  .cta-band .cta-desc{font-size:15px;color:#3E5679;line-height:1.85;max-width:460px}
  .cta-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:20px}
  .form-row{display:grid;gap:14px}
  .field label{display:block;font-size:13px;font-weight:600;color:var(--brand-900);margin-bottom:7px}
  .field input{
    width:100%;height:48px;border-radius:var(--radius-btn);border:1px solid #CBD9EC;
    background:#fff;padding:0 14px;font-size:15px;
    transition:border-color .2s ease-out,box-shadow .2s ease-out;
  }
  .field input::placeholder{color:#9AAABF}
  .field input:focus{outline:none;border-color:var(--brand-600);box-shadow:0 0 0 3px rgba(228,237,249,1)}
  .form-note{font-size:12.5px;color:#5B6B80;margin-top:10px}
  .form-msg{font-size:13px;color:var(--accent);margin-top:8px;min-height:18px}

  /* ---------- Footer ---------- */
  .site-footer{background:var(--brand-900);color:#fff;margin-top:56px;padding:58px 0 26px}
  .footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.35fr;gap:34px}
  .footer-brand{display:inline-flex;align-items:center;gap:10px;font-size:18px;font-weight:700;color:#fff}
  .footer-desc{font-size:14px;line-height:1.85;color:rgba(255,255,255,.7);margin:16px 0 18px;max-width:330px}
  .footer-stats{display:flex;flex-wrap:wrap;gap:8px}
  .footer-chip{
    font-size:12px;padding:5px 11px;border-radius:999px;
    background:rgba(255,255,255,.09);color:rgba(255,255,255,.8);
  }
  .footer-col h3{
    position:relative;font-size:14px;font-weight:600;padding-top:12px;margin-bottom:16px;
  }
  .footer-col h3::before{
    content:"";position:absolute;top:0;left:0;width:22px;height:2px;background:var(--accent);
  }
  .footer-col ul{display:grid;gap:11px}
  .footer-col a{font-size:14px;color:rgba(255,255,255,.78);transition:color .2s ease-out}
  .footer-col a:hover{color:var(--brand-100);text-decoration:underline;text-underline-offset:4px}
  .footer-contact li{font-size:13.5px;line-height:1.75;color:rgba(255,255,255,.78)}
  .footer-contact b{color:rgba(255,255,255,.95);font-weight:600}
  .footer-bottom{
    margin-top:38px;padding-top:20px;border-top:1px solid rgba(255,255,255,.12);
    display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
    font-size:13px;color:rgba(255,255,255,.6);line-height:1.7;
  }

  /* ---------- Responsive ---------- */
  @media (max-width:1023px){
    .nav-side{display:none}
    .nav-bar{grid-template-columns:1fr auto;min-height:68px}
    .logo{justify-self:start}
    .burger{display:inline-flex}
    .logo-text > span:first-child{font-size:17px}
    .logo-sub{font-size:10px;letter-spacing:1.5px}
    .section{padding:72px 0}
    .icon-grid{grid-template-columns:repeat(2,1fr)}
    .rel-grid{grid-template-columns:repeat(2,1fr)}
    .faq-layout{grid-template-columns:1fr;gap:26px}
    .faq-intro p{max-width:none}
    .cta-band{grid-template-columns:1fr;padding:28px}
    .footer-grid{grid-template-columns:1fr 1fr;gap:30px}
    .entry-card{grid-template-columns:52px 1fr;align-items:start}
    .entry-card .entry-cta{grid-column:1 / -1;justify-self:stretch}
    .entry-card .entry-cta .btn{width:100%}
  }
  @media (max-width:767px){
    .section{padding:56px 0}
    .section-head{flex-direction:column;align-items:flex-start;gap:12px}
    .compare{grid-template-columns:1fr}
    .compare > div:first-child{border-right:0;border-bottom:1px solid var(--line)}
    .icon-grid{grid-template-columns:1fr}
    .rel-grid{grid-template-columns:1fr}
    .cover-strip img{height:190px}
    .cover-strip .strip-text{padding:20px}
    .footer-grid{grid-template-columns:1fr}
    .footer-bottom{flex-direction:column;gap:8px}
    .wrap{padding:0 20px}
  }
  @media (max-width:520px){
    .page-head h1{font-size:26px}
    .entry-card{padding:20px}
    .cta-band{padding:22px}
    .cta-actions .btn{width:100%}
  }