/* roulang page: index */
:root{
  --brand:#175CD3;
  --brand-strong:#0F3F96;
  --brand-hover:#3B7BE0;
  --brand-tint:#EAF1FD;
  --accent:#FF7A2F;
  --accent-tint:#FFF1E6;
  --c1:#175CD3;
  --c2:#12B3A0;
  --c3:#7A5AF8;
  --c4:#E8942B;
  --bg:#F6F8FC;
  --surface:#FFFFFF;
  --dark:#0B1730;
  --border:#E3E8F0;
  --divider:#EEF1F6;
  --t1:#0F172A;
  --t2:#475569;
  --t3:#94A3B8;
  --r8:8px;
  --r12:12px;
  --r16:16px;
  --r22:22px;
  --r999:999px;
  --sh1:0 1px 2px rgba(15,23,42,.06);
  --sh2:0 6px 20px -6px rgba(15,23,42,.12);
  --sh3:0 18px 40px -12px rgba(23,92,211,.22);
  --sec:80px;
  --font:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC",system-ui,"Segoe UI",sans-serif;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.75;
  color:var(--t1);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0;}
a{color:inherit;text-decoration:none;transition:color .18s ease;}
a:hover{color:var(--brand);}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
button{font-family:inherit;cursor:pointer;}
input,button{font-size:inherit;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:var(--r8);}

.container{
  width:100%;
  max-width:1240px;
  margin:0 auto;
  padding:0 32px;
}

/* ---------- 顶部信息条 ---------- */
.topbar{
  background:var(--dark);
  color:#D6DEEE;
  font-size:12.5px;
  line-height:34px;
}
.topbar__inner{display:flex;align-items:center;justify-content:space-between;gap:16px;}
.topbar__left{display:flex;align-items:center;gap:12px;min-width:0;}
.topbar__brand{
  display:inline-block;
  color:#fff;
  font-weight:600;
  letter-spacing:.02em;
  white-space:nowrap;
}
.topbar__divider{width:1px;height:12px;background:rgba(255,255,255,.22);}
.topbar__note{
  color:#9FB0CC;
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
}
.topbar__right{display:flex;align-items:center;gap:18px;white-space:nowrap;}
.topbar__right a{color:#C8D4E8;}
.topbar__right a:hover{color:#fff;}
.topbar__cta{
  color:#fff !important;
  background:rgba(255,255,255,.12);
  padding:0 12px;
  border-radius:var(--r999);
  line-height:24px;
  display:inline-block;
  transition:background .18s ease;
}
.topbar__cta:hover{background:rgba(255,255,255,.22);}

/* ---------- 主导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:#fff;
  border-bottom:1px solid var(--border);
  transition:box-shadow .2s ease,background .2s ease;
}
.site-header.is-scrolled{
  background:rgba(255,255,255,.88);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  box-shadow:var(--sh2);
}
.header__inner{
  display:flex;
  align-items:center;
  gap:24px;
  height:68px;
}
.logo{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.logo:hover{color:var(--t1);}
.logo__mark{
  width:36px;height:36px;
  border-radius:var(--r12);
  background:linear-gradient(140deg,var(--brand),var(--brand-strong));
  color:#fff;
  font-size:13px;
  font-weight:700;
  display:flex;
  align-items:center;
  justify-content:center;
  letter-spacing:.03em;
  box-shadow:var(--sh2);
}
.logo__text{font-size:17px;font-weight:700;letter-spacing:.01em;}

.main-nav{flex:1 1 auto;min-width:0;}
.main-nav ul{display:flex;align-items:center;gap:6px;}
.main-nav a{
  display:block;
  position:relative;
  padding:0 12px;
  line-height:68px;
  font-size:14.5px;
  color:var(--t2);
  white-space:nowrap;
}
.main-nav a::after{
  content:"";
  position:absolute;
  left:12px;right:12px;bottom:0;
  height:2px;
  background:var(--brand);
  border-radius:2px;
  opacity:0;
  transform:scaleX(.4);
  transition:opacity .2s ease,transform .2s ease;
}
.main-nav a:hover{color:var(--brand);}
.main-nav a:hover::after{opacity:.55;transform:scaleX(1);}
.main-nav a.is-active{color:var(--brand);font-weight:600;}
.main-nav a.is-active::after{opacity:1;transform:scaleX(1);}

.header__actions{display:flex;align-items:center;gap:12px;flex:0 0 auto;}
.search-box{
  display:flex;
  align-items:center;
  gap:8px;
  height:38px;
  padding:0 12px;
  border:1px solid var(--border);
  border-radius:var(--r999);
  background:var(--bg);
  transition:border-color .18s ease,background .18s ease;
}
.search-box:focus-within{border-color:var(--brand);background:#fff;box-shadow:0 0 0 3px var(--brand-tint);}
.search-box i{color:var(--t3);font-size:13px;}
.search-box input{
  border:0;background:transparent;outline:none;
  width:120px;font-size:13.5px;color:var(--t1);
}
.search-box input::placeholder{color:var(--t3);}

.nav-toggle{
  display:none;
  width:40px;height:40px;
  border:1px solid var(--border);
  background:#fff;
  border-radius:var(--r12);
  color:var(--t1);
  font-size:16px;
}

/* 移动抽屉 */
.drawer{
  position:fixed;
  inset:0;
  z-index:120;
  pointer-events:none;
  visibility:hidden;
}
.drawer__mask{
  position:absolute;inset:0;
  background:rgba(11,23,48,.45);
  opacity:0;
  transition:opacity .2s ease;
}
.drawer__panel{
  position:absolute;
  top:0;right:0;
  width:min(86vw,340px);
  height:100%;
  background:#fff;
  display:flex;
  flex-direction:column;
  transform:translateX(100%);
  transition:transform .24s ease;
  box-shadow:var(--sh3);
}
.drawer.is-open{pointer-events:auto;visibility:visible;}
.drawer.is-open .drawer__mask{opacity:1;}
.drawer.is-open .drawer__panel{transform:translateX(0);}
.drawer__head{
  display:flex;align-items:center;justify-content:space-between;
  padding:16px 20px;border-bottom:1px solid var(--divider);
}
.drawer__title{font-size:15px;font-weight:600;}
.drawer__close{
  width:34px;height:34px;border:1px solid var(--border);background:#fff;
  border-radius:var(--r8);color:var(--t2);
}
.drawer__body{padding:16px 20px;overflow-y:auto;flex:1 1 auto;}
.drawer__grid{display:grid;grid-template-columns:1fr 1fr;gap:10px;}
.drawer__grid a{
  display:block;
  padding:12px 14px;
  border:1px solid var(--border);
  border-radius:var(--r12);
  font-size:14px;
  color:var(--t2);
  background:var(--bg);
}
.drawer__grid a:hover{background:var(--brand-tint);color:var(--brand);border-color:#CFE0FA;}
.drawer__foot{padding:16px 20px;border-top:1px solid var(--divider);}
.drawer__foot .btn{width:100%;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:48px;
  padding:0 24px;
  border-radius:var(--r12);
  font-size:15px;
  font-weight:600;
  border:1px solid transparent;
  transition:background .18s ease,color .18s ease,transform .18s ease,box-shadow .18s ease,border-color .18s ease;
  white-space:nowrap;
}
.btn--sm{height:38px;padding:0 16px;font-size:13.5px;border-radius:var(--r8);}
.btn--primary{background:var(--brand);color:#fff;box-shadow:var(--sh1);}
.btn--primary:hover{background:var(--brand-hover);color:#fff;transform:translateY(-1px);box-shadow:var(--sh2);}
.btn--primary:active{transform:translateY(0);box-shadow:var(--sh1);}
.btn--ghost{background:transparent;color:var(--brand);border-color:#C7D9F6;}
.btn--ghost:hover{background:var(--brand-tint);color:var(--brand);}
.btn--dark{background:var(--accent);color:#fff;}
.btn--dark:hover{background:#F0681A;color:#fff;transform:translateY(-1px);box-shadow:var(--sh2);}
.btn--outline-light{background:transparent;color:#fff;border-color:rgba(255,255,255,.55);}
.btn--outline-light:hover{background:rgba(255,255,255,.14);color:#fff;}

/* ---------- 通用区块 ---------- */
.section{padding:var(--sec) 0;}
.section--tight{padding:56px 0;}
.section--plain{background:#fff;}
.section__head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:20px;
  margin-bottom:32px;
}
.section__title{font-size:28px;font-weight:700;line-height:1.3;letter-spacing:.01em;}
.section__desc{margin-top:8px;font-size:14.5px;color:var(--t2);max-width:680px;}
.section__more{
  font-size:14px;
  color:var(--brand);
  display:inline-flex;
  align-items:center;
  gap:6px;
  white-space:nowrap;
}
.section__more i{font-size:11px;transition:transform .18s ease;}
.section__more:hover i{transform:translateX(3px);}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:12.5px;
  font-weight:600;
  color:var(--brand);
  background:var(--brand-tint);
  padding:5px 12px;
  border-radius:var(--r999);
  letter-spacing:.02em;
}

/* ---------- Hero ---------- */
.hero{
  position:relative;
  overflow:hidden;
  background:#0B1730;
  min-height:560px;
  display:flex;
  align-items:center;
}
.hero__bg{
  position:absolute;inset:0;
  background-image:url("/assets/images/backpic/back-1.png");
  background-size:cover;
  background-position:center;
}
.hero__mask{
  position:absolute;inset:0;
  background:linear-gradient(90deg,rgba(255,255,255,.94) 0%,rgba(255,255,255,.86) 42%,rgba(255,255,255,.42) 72%,rgba(255,255,255,.18) 100%);
}
.hero__inner{position:relative;z-index:2;padding:88px 0;}
.hero__box{max-width:720px;}
.hero__title{
  margin-top:18px;
  font-size:52px;
  line-height:1.18;
  font-weight:700;
  letter-spacing:-.01em;
  color:var(--t1);
}
.hero__sub{
  margin-top:18px;
  font-size:17px;
  line-height:1.8;
  color:var(--t2);
  max-width:620px;
}
.hero__actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px;}
.hero__tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px;}
.tag{
  display:inline-block;
  font-size:12.5px;
  color:var(--t2);
  background:rgba(255,255,255,.86);
  border:1px solid var(--border);
  padding:6px 13px;
  border-radius:var(--r999);
}
.hero__stats{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:18px;
  margin-top:40px;
  max-width:640px;
}
.hero__stat{
  background:rgba(255,255,255,.85);
  border:1px solid var(--border);
  border-radius:var(--r16);
  padding:16px 18px;
  box-shadow:var(--sh1);
}
.hero__stat b{display:block;font-size:22px;font-weight:700;color:var(--brand);line-height:1.3;}
.hero__stat span{font-size:13px;color:var(--t2);}

/* ---------- 横滑片库 ---------- */
.rail-wrap{position:relative;}
.rail{
  display:flex;
  gap:20px;
  overflow-x:auto;
  scroll-behavior:smooth;
  padding:6px 2px 18px;
  scrollbar-width:none;
}
.rail::-webkit-scrollbar{display:none;}
.rail-card{
  flex:0 0 224px;
  background:#fff;
  border:1px solid var(--border);
  border-radius:var(--r16);
  overflow:hidden;
  box-shadow:var(--sh1);
  transition:transform .2s ease,box-shadow .2s ease;
}
.rail-card:hover{transform:translateY(-4px);box-shadow:var(--sh2);}
.rail-card__pic{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--brand-tint);}
.rail-card__pic img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease;}
.rail-card:hover .rail-card__pic img{transform:scale(1.05);}
.rail-card__body{padding:14px 16px 18px;}
.rail-card__title{font-size:15px;font-weight:600;line-height:1.45;}
.rail-card__meta{margin-top:8px;font-size:12.5px;color:var(--t3);}
.rail-btn{
  position:absolute;
  top:38%;
  width:40px;height:40px;
  border-radius:50%;
  border:1px solid var(--border);
  background:#fff;
  color:var(--t1);
  box-shadow:var(--sh2);
  display:flex;align-items:center;justify-content:center;
  z-index:3;
  transition:background .18s ease,color .18s ease;
}
.rail-btn:hover{background:var(--brand);color:#fff;border-color:var(--brand);}
.rail-btn--prev{left:-8px;}
.rail-btn--next{right:-8px;}

/* ---------- 热播推荐 ---------- */
.feature-grid{
  display:grid;
  grid-template-columns:repeat(12,minmax(0,1fr));
  gap:24px;
}
.feature-main{
  grid-column:span 8;
  position:relative;
  height:360px;
  border-radius:var(--r22);
  overflow:hidden;
  box-shadow:var(--sh2);
}
.feature-main img{width:100%;height:100%;object-fit:cover;}
.feature-main__layer{
  position:absolute;inset:auto 0 0 0;
  padding:28px;
  background:linear-gradient(180deg,rgba(11,23,48,0) 0%,rgba(11,23,48,.82) 100%);
  color:#fff;
}
.feature-main__layer h3{font-size:22px;font-weight:700;}
.feature-main__layer p{margin-top:8px;font-size:14px;color:rgba(255,255,255,.82);max-width:520px;}
.badge{
  display:inline-block;
  font-size:12px;
  font-weight:600;
  padding:4px 10px;
  border-radius:var(--r999);
  white-space:nowrap;
  line-height:1.5;
}
.badge--c1{background:rgba(23,92,211,.1);color:var(--c1);}
.badge--c2{background:rgba(18,179,160,.12);color:#0E8C7E;}
.badge--c3{background:rgba(122,90,248,.12);color:#6344E6;}
.badge--c4{background:rgba(232,148,43,.14);color:#B96C10;}
.badge--accent{background:var(--accent-tint);color:#D9600F;}
.badge--light{background:rgba(255,255,255,.9);color:var(--brand);}

.feature-side{
  grid-column:span 4;
  display:grid;
  grid-template-rows:repeat(3,1fr);
  gap:16px;
}
.side-card{
  display:flex;
  gap:14px;
  align-items:center;
  background:#fff;
  border:1px solid var(--border);
  border-radius:var(--r16);
  padding:12px;
  box-shadow:var(--sh1);
  transition:transform .2s ease,box-shadow .2s ease;
}
.side-card:hover{transform:translateY(-3px);box-shadow:var(--sh2);}
.side-card__pic{
  flex:0 0 96px;
  height:64px;
  border-radius:var(--r12);
  overflow:hidden;
  background:var(--brand-tint);
}
.side-card__pic img{width:100%;height:100%;object-fit:cover;}
.side-card__title{font-size:14.5px;font-weight:600;line-height:1.45;}
.side-card__meta{margin-top:6px;font-size:12.5px;color:var(--t3);}

/* ---------- Bento 分类入口 ---------- */
.bento{
  display:grid;
  grid-template-columns:repeat(12,minmax(0,1fr));
  gap:24px;
}
.bento-card{
  position:relative;
  border-radius:var(--r22);
  overflow:hidden;
  min-height:210px;
  padding:24px;
  display:flex;
  flex-direction:column;
  justify-content:space-between;
  border:1px solid var(--border);
  transition:transform .2s ease,box-shadow .2s ease;
  box-shadow:var(--sh1);
}
.bento-card:hover{transform:translateY(-4px);box-shadow:var(--sh2);}
.bento-card__pic{
  position:absolute;inset:0;
  opacity:.16;
  background-size:cover;
  background-position:center;
}
.bento-card__top{position:relative;z-index:2;}
.bento-card__name{font-size:20px;font-weight:700;margin-top:10px;color:var(--t1);}
.bento-card__desc{margin-top:8px;font-size:13.5px;color:var(--t2);max-width:420px;}
.bento-card__go{
  position:relative;z-index:2;
  display:inline-flex;align-items:center;gap:8px;
  font-size:13.5px;font-weight:600;color:var(--brand);
}
.bento-card__go i{font-size:11px;transition:transform .18s ease;}
.bento-card:hover .bento-card__go i{transform:translateX(4px);}
.bento-card--a{grid-column:span 5;background:linear-gradient(140deg,#F2F7FE,#FFFFFF 70%);}
.bento-card--b{grid-column:span 7;background:linear-gradient(140deg,#EDFAF7,#FFFFFF 70%);}
.bento-card--c{grid-column:span 4;background:linear-gradient(140deg,#F3F0FE,#FFFFFF 70%);}
.bento-card--d{grid-column:span 8;background:linear-gradient(140deg,#FEF6EC,#FFFFFF 70%);}

/* ---------- 数据条 ---------- */
.stats{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:20px;
}
.stat-card{
  background:#fff;
  border:1px solid var(--border);
  border-radius:var(--r16);
  padding:22px 24px;
  box-shadow:var(--sh1);
  transition:box-shadow .2s ease,transform .2s ease;
}
.stat-card:hover{box-shadow:var(--sh2);transform:translateY(-3px);}
.stat-card b{display:block;font-size:28px;font-weight:700;color:var(--brand);line-height:1.25;letter-spacing:-.01em;}
.stat-card span{display:block;margin-top:6px;font-size:14px;font-weight:600;}
.stat-card small{display:block;margin-top:4px;font-size:13px;color:var(--t2);}

/* ---------- 最新信息（CMS 区块） ---------- */
.chips{display:flex;flex-wrap:wrap;gap:10px;}
.chip{
  font-size:13px;
  color:var(--t2);
  background:#fff;
  border:1px solid var(--border);
  border-radius:var(--r999);
  padding:6px 14px;
  transition:all .18s ease;
}
.chip:hover,.chip.is-on{background:var(--brand-tint);color:var(--brand);border-color:#CFE0FA;}

.news-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:24px;
}
.news-card{
  background:#fff;
  border:1px solid var(--border);
  border-radius:var(--r16);
  padding:22px;
  box-shadow:var(--sh1);
  display:flex;
  flex-direction:column;
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--sh2);border-color:#D5E2F8;}
.news-card__top{display:flex;align-items:center;justify-content:space-between;gap:12px;}
.news-card__title{
  margin-top:14px;
  font-size:17px;
  font-weight:600;
  line-height:1.5;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.news-card__title a{color:var(--t1);}
.news-card__title a:hover{color:var(--brand);}
.news-card__sum{
  margin-top:10px;
  font-size:14px;
  color:var(--t2);
  line-height:1.75;
  display:-webkit-box;
  -webkit-line-clamp:3;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.news-card__foot{
  margin-top:auto;
  padding-top:16px;
  border-top:1px solid var(--divider);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  font-size:12.5px;
  color:var(--t3);
}
.news-card__foot .link{color:var(--brand);font-weight:600;font-size:13px;}
.news-empty{
  grid-column:1/-1;
  background:#fff;
  border:1px dashed var(--border);
  border-radius:var(--r16);
  padding:64px 24px;
  text-align:center;
}
.news-empty i{font-size:30px;color:var(--t3);}
.news-empty p{margin-top:14px;font-size:14.5px;color:var(--t2);}
.news-empty .btn{margin-top:20px;}

/* ---------- CTA 带 ---------- */
.cta-band{
  position:relative;
  overflow:hidden;
  background:var(--dark);
  color:#fff;
}
.cta-band__bg{
  position:absolute;inset:0;
  background-image:url("/assets/images/backpic/back-2.webp");
  background-size:cover;
  background-position:center;
  opacity:.34;
}
.cta-band__mask{
  position:absolute;inset:0;
  background:linear-gradient(90deg,rgba(11,23,48,.94) 0%,rgba(11,23,48,.78) 55%,rgba(11,23,48,.55) 100%);
}
.cta-band__inner{
  position:relative;z-index:2;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:32px;
  padding:64px 0;
}
.cta-band h2{font-size:28px;font-weight:700;line-height:1.35;color:#fff;}
.cta-band p{margin-top:12px;font-size:15px;color:rgba(255,255,255,.78);max-width:620px;}
.cta-band__actions{display:flex;gap:14px;flex-wrap:wrap;flex:0 0 auto;}

/* ---------- FAQ ---------- */
.faq-list{max-width:900px;margin:0 auto;display:grid;gap:14px;}
.faq-item{
  background:#fff;
  border:1px solid var(--border);
  border-radius:var(--r16);
  overflow:hidden;
  transition:box-shadow .2s ease,border-color .2s ease;
}
.faq-item.is-open{box-shadow:var(--sh2);border-color:#D5E2F8;}
.faq-q{
  width:100%;
  min-height:56px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  padding:14px 22px;
  background:transparent;
  border:0;
  text-align:left;
  font-size:16px;
  font-weight:600;
  color:var(--t1);
}
.faq-q i{color:var(--brand);font-size:14px;transition:transform .2s ease;}
.faq-item.is-open .faq-q i{transform:rotate(180deg);}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .22s ease;
}
.faq-a p{padding:0 22px 20px;font-size:15px;color:var(--t2);line-height:1.8;}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--dark);color:#B9C6DC;padding-top:64px;}
.footer__grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1fr;
  gap:40px;
  padding-bottom:44px;
}
.footer__brand{display:flex;align-items:center;gap:10px;color:#fff;font-size:17px;font-weight:700;}
.footer__brand .logo__mark{box-shadow:none;}
.footer__desc{margin-top:16px;font-size:13.5px;line-height:1.85;color:#93A3BD;max-width:320px;}
.footer__title{font-size:14px;font-weight:600;color:#fff;margin-bottom:16px;}
.footer__list li{margin-bottom:10px;}
.footer__list a{font-size:13px;color:#9FB0CC;display:inline-block;transition:color .18s ease,transform .18s ease;}
.footer__list a:hover{color:#fff;transform:translateX(-2px);}
.footer__bottom{
  border-top:1px solid rgba(255,255,255,.1);
  padding:22px 0 30px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  font-size:12.5px;
  color:#8296B4;
  flex-wrap:wrap;
}

/* ---------- 响应式 ---------- */
@media screen and (min-width:1440px){
  .container{max-width:1300px;}
}
@media screen and (max-width:1199px){
  .main-nav a{padding:0 9px;font-size:13.5px;}
  .search-box input{width:92px;}
  .hero__title{font-size:44px;}
  .feature-main{grid-column:span 12;height:320px;}
  .feature-side{grid-column:span 12;grid-template-rows:none;grid-template-columns:repeat(3,1fr);}
  .news-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .stats{grid-template-columns:repeat(2,minmax(0,1fr));}
}
@media screen and (max-width:991px){
  :root{--sec:56px;}
  .container{padding:0 24px;}
  .main-nav{display:none;}
  .search-box{display:none;}
  .nav-toggle{display:inline-flex;align-items:center;justify-content:center;}
  .header__inner{height:60px;gap:12px;}
  .logo__text{font-size:16px;}
  .hero{min-height:auto;}
  .hero__inner{padding:64px 0;}
  .hero__mask{background:linear-gradient(180deg,rgba(255,255,255,.94) 0%,rgba(255,255,255,.86) 60%,rgba(255,255,255,.7) 100%);}
  .hero__title{font-size:34px;}
  .hero__sub{font-size:15.5px;}
  .hero__stats{grid-template-columns:repeat(3,1fr);gap:12px;}
  .bento-card--a,.bento-card--b,.bento-card--c,.bento-card--d{grid-column:span 12;}
  .feature-side{grid-template-columns:1fr;gap:14px;}
  .cta-band__inner{flex-direction:column;align-items:flex-start;gap:24px;padding:52px 0;}
  .footer__grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media screen and (max-width:767px){
  :root{--sec:44px;}
  .container{padding:0 16px;}
  .topbar{font-size:12px;line-height:30px;}
  .topbar__note{display:none;}
  .topbar__right{gap:12px;}
  .hero__inner{padding:48px 0;}
  .hero__box{max-width:100%;text-align:center;}
  .hero__title{font-size:29px;}
  .hero__sub{margin-left:auto;margin-right:auto;font-size:15px;}
  .hero__actions{justify-content:center;}
  .hero__actions .btn{width:100%;}
  .hero__tags{justify-content:center;}
  .hero__stats{grid-template-columns:1fr;max-width:100%;}
  .section__head{flex-direction:column;align-items:flex-start;gap:12px;}
  .section__title{font-size:22px;}
  .news-grid{grid-template-columns:1fr;}
  .stats{grid-template-columns:1fr;}
  .rail-btn{display:none;}
  .rail-card{flex:0 0 190px;}
  .feature-main{height:260px;}
  .feature-main__layer{padding:18px;}
  .feature-main__layer h3{font-size:18px;}
  .cta-band h2{font-size:22px;}
  .cta-band__actions{width:100%;}
  .cta-band__actions .btn{width:100%;}
  .footer__grid{grid-template-columns:1fr;gap:28px;}
  .footer__bottom{flex-direction:column;align-items:flex-start;}
  .faq-q{font-size:15px;padding:12px 18px;}
  .faq-a p{padding:0 18px 18px;font-size:14.5px;}
}
@media screen and (max-width:420px){
  .hero__title{font-size:25px;}
  .hero__sub{font-size:14.5px;}
  .btn{height:44px;padding:0 18px;font-size:14.5px;}
  .stat-card b{font-size:24px;}
}

/* roulang page: article */
:root{
  --brand:#175CD3;--brand-strong:#0F3F96;--brand-hover:#3B7BE0;--brand-tint:#EAF1FD;
  --accent:#FF7A2F;--accent-tint:#FFF1E6;
  --c1:#175CD3;--c2:#12B3A0;--c3:#7A5AF8;--c4:#E8942B;
  --bg:#F6F8FC;--surface:#FFFFFF;--dark:#0B1730;--border:#E3E8F0;--divider:#EEF1F6;
  --t1:#0F172A;--t2:#475569;--t3:#94A3B8;
  --r8:8px;--r12:12px;--r16:16px;--r22:22px;--rpill:999px;
  --sh1:0 1px 2px rgba(15,23,42,.06);
  --sh2:0 6px 20px -6px rgba(15,23,42,.12);
  --sh3:0 18px 40px -12px rgba(23,92,211,.22);
  --sp-section:80px;
  --font:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC",system-ui,"Segoe UI",sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{margin:0;background:var(--bg);color:var(--t1);font-family:var(--font);font-size:16px;line-height:1.75;-webkit-font-smoothing:antialiased;}
img{max-width:100%;display:block;border:0;}
a{color:var(--brand);text-decoration:none;transition:color .18s ease;}
a:hover{color:var(--brand-hover);}
h1,h2,h3,h4{margin:0 0 .6em;font-weight:700;line-height:1.25;color:var(--t1);}
p{margin:0 0 1.1em;}
ul,ol{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
input,button{font-size:16px;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px;}
.container{width:100%;max-width:1240px;margin:0 auto;padding:0 32px;}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:60;background:rgba(246,248,252,.92);backdrop-filter:saturate(160%) blur(10px);border-bottom:1px solid var(--border);transition:box-shadow .22s ease,background .22s ease;}
.site-header.is-stuck{box-shadow:var(--sh2);background:rgba(255,255,255,.96);}
.header__inner{display:flex;align-items:center;gap:28px;height:68px;}
.logo{display:inline-flex;align-items:center;gap:10px;color:var(--t1);font-weight:700;letter-spacing:.2px;}
.logo:hover{color:var(--brand);}
.logo__mark{display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;border-radius:10px;background:linear-gradient(135deg,var(--brand),var(--brand-strong));color:#fff;font-size:13px;font-weight:800;letter-spacing:.5px;}
.logo__text{font-size:17px;white-space:nowrap;}
.main-nav{margin-left:auto;}
.main-nav ul{display:flex;align-items:center;gap:4px;}
.main-nav a{position:relative;display:inline-block;padding:10px 12px;font-size:15px;color:var(--t2);border-radius:var(--r8);}
.main-nav a::after{content:"";position:absolute;left:12px;right:12px;bottom:4px;height:2px;background:var(--brand);transform:scaleX(0);transform-origin:left;transition:transform .2s ease;}
.main-nav a:hover{color:var(--brand);background:var(--brand-tint);}
.main-nav a:hover::after,.main-nav a.is-active::after{transform:scaleX(1);}
.main-nav a.is-active{color:var(--brand);font-weight:600;}
.header__actions{display:flex;align-items:center;gap:12px;}
.search-box{position:relative;display:flex;align-items:center;}
.search-box i{position:absolute;left:12px;color:var(--t3);font-size:13px;}
.search-box input{height:40px;width:186px;padding:0 14px 0 34px;border:1px solid var(--border);border-radius:var(--rpill);background:var(--surface);color:var(--t1);font-size:14px;transition:border-color .18s ease,box-shadow .18s ease;}
.search-box input::placeholder{color:var(--t3);}
.search-box input:focus{border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-tint);outline:none;}
.nav-toggle{display:none;width:42px;height:42px;border:1px solid var(--border);border-radius:var(--r12);background:var(--surface);color:var(--t1);cursor:pointer;}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:48px;padding:0 24px;border:1px solid transparent;border-radius:var(--r12);font-size:15px;font-weight:600;cursor:pointer;transition:transform .18s ease,background .18s ease,box-shadow .18s ease,color .18s ease,border-color .18s ease;}
.btn--primary{background:var(--brand);color:#fff;box-shadow:var(--sh1);}
.btn--primary:hover{background:var(--brand-hover);color:#fff;transform:translateY(-1px);box-shadow:var(--sh2);}
.btn--primary:active{transform:translateY(0);box-shadow:var(--sh1);}
.btn--ghost{background:transparent;border-color:var(--border);color:var(--brand);}
.btn--ghost:hover{background:var(--brand-tint);color:var(--brand-strong);}
.btn--sm{height:40px;padding:0 18px;font-size:14px;border-radius:var(--r12);}

/* ---------- breadcrumb ---------- */
.crumb-wrap{padding:22px 0 0;}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--t3);}
.breadcrumb li{display:flex;align-items:center;gap:8px;}
.breadcrumb li+li::before{content:"/";color:var(--t3);}
.breadcrumb a{color:var(--t3);}
.breadcrumb a:hover{color:var(--brand);}
.breadcrumb .current{color:var(--t2);max-width:320px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}

/* ---------- article head ---------- */
.article-head{padding:26px 0 34px;border-bottom:1px solid var(--divider);}
.badge{display:inline-block;padding:4px 12px;border-radius:var(--rpill);font-size:12px;font-weight:600;line-height:1.7;white-space:nowrap;background:var(--brand-tint);color:var(--brand);}
.badge--accent{background:var(--accent-tint);color:#C2551A;}
.badge--c2{background:rgba(18,179,160,.1);color:#0E8C7E;}
.badge--c3{background:rgba(122,90,248,.1);color:#5B3FD6;}
.badge--c4{background:rgba(232,148,43,.12);color:#B26A12;}
.article-head h1{font-size:38px;line-height:1.3;margin:16px 0 14px;max-width:900px;}
.meta-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:13px;color:var(--t3);}
.meta-row span.dot{width:4px;height:4px;border-radius:50%;background:var(--t3);display:inline-block;}
.lede{margin-top:18px;font-size:16px;color:var(--t2);max-width:820px;}

/* ---------- layout ---------- */
.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:56px;padding:44px 0 var(--sp-section);align-items:start;}
.article-main{min-width:0;}
.article-narrow{max-width:800px;}

/* mobile toc */
.toc-fold{border:1px solid var(--border);background:var(--surface);border-radius:var(--r12);box-shadow:var(--sh1);margin-bottom:26px;overflow:hidden;}
.toc-fold summary{cursor:pointer;list-style:none;padding:14px 18px;font-size:14px;font-weight:600;color:var(--t1);display:flex;align-items:center;justify-content:space-between;}
.toc-fold summary::-webkit-details-marker{display:none;}
.toc-fold summary::after{content:"\f107";font-family:"Font Awesome 6 Free";font-weight:900;color:var(--t3);transition:transform .2s ease;}
.toc-fold[open] summary::after{transform:rotate(180deg);}
.toc-fold ul{padding:0 18px 16px;}
.toc-fold li{margin-bottom:8px;font-size:14px;}
.toc-fold a{color:var(--t2);}
.toc-fold a:hover{color:var(--brand);}

/* ---------- article body ---------- */
.article-body{font-size:17px;line-height:1.9;color:#1E293B;max-width:800px;}
.article-body>*:first-child{margin-top:0;}
.article-body p{margin:0 0 1.25em;}
.article-body h2{position:relative;font-size:26px;margin:2em 0 .8em;padding-left:14px;}
.article-body h2::before{content:"";position:absolute;left:0;top:.22em;bottom:.22em;width:4px;border-radius:2px;background:var(--brand);}
.article-body h3{font-size:21px;margin:1.7em 0 .6em;font-weight:700;}
.article-body h4{font-size:17px;margin:1.4em 0 .5em;}
.article-body ul,.article-body ol{margin:0 0 1.3em;padding-left:1.3em;list-style:revert;}
.article-body li{margin:.6em 0;line-height:1.85;}
.article-body img{border-radius:var(--r12);margin:1.6em 0;box-shadow:var(--sh1);}
.article-body figcaption,.article-body .caption{font-size:13px;color:var(--t3);text-align:center;margin:-.9em 0 1.6em;}
.article-body blockquote{margin:1.6em 0;padding:16px 22px;background:var(--surface);border-left:3px solid var(--c2);border-radius:0 var(--r12) var(--r12) 0;color:var(--t2);font-size:16px;box-shadow:var(--sh1);}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body a{color:var(--brand);border-bottom:1px solid rgba(23,92,211,.28);}
.article-body a:hover{color:var(--brand-hover);border-bottom-color:var(--brand-hover);}
.article-body table{width:100%;border-collapse:collapse;margin:1.6em 0;font-size:15px;background:var(--surface);border-radius:var(--r12);overflow:hidden;box-shadow:var(--sh1);}
.article-body th,.article-body td{padding:12px 16px;border-bottom:1px solid var(--divider);text-align:left;}
.article-body thead th{background:var(--brand-tint);color:var(--brand-strong);font-weight:600;}
.article-body tbody tr:nth-child(even){background:#FAFBFE;}
.table-scroll{overflow-x:auto;margin:1.6em 0;}
.article-body code{background:var(--brand-tint);color:var(--brand-strong);padding:2px 6px;border-radius:6px;font-size:.92em;}

/* ---------- empty state ---------- */
.empty-state{padding:64px 24px;text-align:center;background:var(--surface);border:1px solid var(--border);border-radius:var(--r16);box-shadow:var(--sh1);}
.empty-state i{font-size:30px;color:var(--t3);}
.empty-state h2{font-size:20px;margin:16px 0 8px;}
.empty-state p{color:var(--t2);font-size:15px;margin-bottom:22px;}

/* ---------- tags & share ---------- */
.after-body{margin-top:44px;padding-top:28px;border-top:1px solid var(--divider);max-width:800px;}
.tag-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-bottom:22px;}
.tag-row .label{font-size:13px;color:var(--t3);margin-right:2px;}
.tag{display:inline-block;padding:6px 14px;border:1px solid var(--border);border-radius:var(--rpill);font-size:13px;color:var(--t2);background:var(--surface);}
.tag:hover{border-color:var(--brand);color:var(--brand);background:var(--brand-tint);}
.share-row{display:flex;align-items:center;gap:12px;}
.share-row .label{font-size:13px;color:var(--t3);margin-right:2px;}
.share-btn{display:inline-flex;align-items:center;justify-content:center;width:42px;height:42px;border:1px solid var(--border);border-radius:50%;background:var(--surface);color:var(--t2);cursor:pointer;transition:all .18s ease;}
.share-btn:hover{border-color:var(--brand);color:var(--brand);background:var(--brand-tint);transform:translateY(-2px);box-shadow:var(--sh2);}

/* ---------- prev / next ---------- */
.postnav{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:44px;max-width:800px;}
.postnav a{display:block;padding:20px 22px;background:var(--surface);border:1px solid var(--border);border-radius:var(--r16);box-shadow:var(--sh1);transition:all .2s ease;}
.postnav a:hover{transform:translateY(-3px);box-shadow:var(--sh2);border-color:#D3DEEE;}
.postnav .k{display:block;font-size:12px;color:var(--t3);margin-bottom:8px;}
.postnav .t{display:block;font-size:15px;font-weight:600;color:var(--t1);line-height:1.5;}
.postnav a:hover .t{color:var(--brand);}

/* ---------- related ---------- */
.section{padding:var(--sp-section) 0;}
.section--tight{padding:56px 0;}
.section__head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:28px;}
.section__head h2{font-size:28px;margin:0;}
.section__head p{margin:6px 0 0;color:var(--t2);font-size:15px;}
.link-more{font-size:14px;font-weight:600;color:var(--brand);white-space:nowrap;}
.grid-cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
.card{display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--border);border-radius:var(--r16);box-shadow:var(--sh1);overflow:hidden;transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;}
.card:hover{transform:translateY(-4px);box-shadow:var(--sh2);border-color:#D3DEEE;}
.card__media{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--brand-tint);}
.card__media img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease;}
.card:hover .card__media img{transform:scale(1.04);}
.card__body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:10px;flex:1;}
.card__title{font-size:17px;font-weight:600;line-height:1.5;margin:0;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.card__title a{color:var(--t1);}
.card:hover .card__title a{color:var(--brand);}
.card__desc{font-size:14px;color:var(--t2);line-height:1.7;margin:0;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;}
.card__meta{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--t3);margin-top:auto;}

/* ---------- sidebar ---------- */
.sidebar{position:sticky;top:96px;display:flex;flex-direction:column;gap:20px;}
.side-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--r16);box-shadow:var(--sh1);padding:22px;}
.side-card h2{font-size:15px;margin:0 0 16px;display:flex;align-items:center;gap:8px;}
.side-card h2 i{color:var(--brand);font-size:13px;}
.side-list li+li{margin-top:14px;padding-top:14px;border-top:1px solid var(--divider);}
.side-link{font-size:15px;font-weight:600;color:var(--t1);display:block;}
.side-link:hover{color:var(--brand);}
.side-note{font-size:13px;color:var(--t3);margin-top:6px;line-height:1.6;}
.side-chips{display:flex;flex-wrap:wrap;gap:8px;}
.chip{display:inline-block;padding:6px 13px;border-radius:var(--rpill);font-size:13px;background:var(--bg);border:1px solid var(--border);color:var(--t2);}
.chip:hover{background:var(--brand-tint);border-color:#C7D9F7;color:var(--brand);}

/* ---------- cta band ---------- */
.cta-band{position:relative;overflow:hidden;background:#0B1730;color:#fff;border-radius:var(--r22);padding:52px 48px;display:flex;align-items:center;justify-content:space-between;gap:32px;box-shadow:var(--sh3);}
.cta-band::before{content:"";position:absolute;inset:0;background-image:url('/assets/images/backpic/back-2.webp');background-size:cover;background-position:center;opacity:.28;}
.cta-band::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(11,23,48,.92),rgba(11,23,48,.58));}
.cta-band>*{position:relative;z-index:1;}
.cta-band h2{color:#fff;font-size:28px;margin:0 0 8px;}
.cta-band p{color:rgba(255,255,255,.78);margin:0;font-size:15px;max-width:620px;}
.btn--ghost-light{background:transparent;border-color:rgba(255,255,255,.5);color:#fff;}
.btn--ghost-light:hover{background:rgba(255,255,255,.14);color:#fff;border-color:#fff;}

/* ---------- faq ---------- */
.faq{max-width:900px;margin:0 auto;}
.faq-item{background:var(--surface);border:1px solid var(--border);border-radius:var(--r12);box-shadow:var(--sh1);margin-bottom:14px;overflow:hidden;}
.faq-q{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:0 22px;min-height:56px;font-size:16px;font-weight:600;color:var(--t1);cursor:pointer;background:none;border:0;width:100%;text-align:left;}
.faq-q i{color:var(--brand);font-size:14px;transition:transform .2s ease;}
.faq-item.is-open .faq-q i{transform:rotate(180deg);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .25s ease;}
.faq-a p{padding:0 22px 18px;margin:0;font-size:15px;color:var(--t2);line-height:1.8;}

/* ---------- footer ---------- */
.site-footer{background:var(--dark);color:rgba(255,255,255,.72);padding:64px 0 0;margin-top:var(--sp-section);}
.footer__grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px;}
.footer__brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:700;font-size:17px;margin-bottom:14px;}
.footer__desc{font-size:13.5px;line-height:1.85;color:rgba(255,255,255,.62);margin:0;max-width:340px;}
.footer__title{font-size:14px;font-weight:600;color:#fff;margin:0 0 16px;}
.footer__list li{margin-bottom:10px;}
.footer__list a{font-size:13px;color:rgba(255,255,255,.66);display:inline-block;transition:transform .18s ease,color .18s ease;}
.footer__list a:hover{color:#fff;transform:translateX(2px);}
.footer__bottom{margin-top:48px;padding:20px 0;border-top:1px solid rgba(255,255,255,.12);display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;font-size:13px;color:rgba(255,255,255,.5);}

/* ---------- responsive ---------- */
@media (max-width:1199px){
  .article-layout{grid-template-columns:minmax(0,1fr);gap:0;}
  .sidebar{display:none;}
  .toc-fold{display:block;}
}
@media (min-width:1200px){
  .toc-fold{display:none;}
}
@media (max-width:991px){
  .container{padding:0 24px;}
  .header__inner{height:56px;gap:14px;}
  .main-nav{position:fixed;left:0;right:0;top:56px;background:var(--surface);border-bottom:1px solid var(--border);box-shadow:var(--sh2);padding:16px 24px 24px;transform:translateY(-12px);opacity:0;visibility:hidden;transition:all .22s ease;margin-left:0;max-height:calc(100vh - 56px);overflow-y:auto;}
  .main-nav.is-open{transform:translateY(0);opacity:1;visibility:visible;}
  .main-nav ul{flex-direction:column;align-items:stretch;gap:2px;display:grid;grid-template-columns:1fr 1fr;}
  .main-nav a{padding:12px 14px;font-size:15px;}
  .main-nav a::after{display:none;}
  .main-nav a.is-active{background:var(--brand-tint);}
  .search-box{display:none;}
  .nav-toggle{display:inline-flex;align-items:center;justify-content:center;}
  .section{padding:56px 0;}
  .article-head h1{font-size:30px;}
  .grid-cards{grid-template-columns:repeat(2,minmax(0,1fr));}
  .cta-band{flex-direction:column;align-items:flex-start;padding:40px 32px;}
  .footer__grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:767px){
  .container{padding:0 16px;}
  :root{--sp-section:44px;}
  .article-head h1{font-size:26px;}
  .article-body{font-size:16px;line-height:1.85;}
  .article-body h2{font-size:22px;}
  .grid-cards{grid-template-columns:1fr;}
  .postnav{grid-template-columns:1fr;}
  .section__head{flex-direction:column;align-items:flex-start;}
  .footer__grid{grid-template-columns:1fr;}
  .cta-band{border-radius:var(--r16);padding:32px 22px;}
  .cta-band h2{font-size:22px;}
  .btn{width:100%;}
  .btn--sm,.header__actions .btn{width:auto;}
}
@media (max-width:420px){
  .logo__text{font-size:15px;}
  .article-body{font-size:15.5px;}
  .meta-row{font-size:12.5px;}
}

/* roulang page: category1 */
:root{
  --brand:#175CD3;
  --brand-strong:#0F3F96;
  --brand-hover:#3B7BE0;
  --brand-tint:#EAF1FD;
  --accent:#FF7A2F;
  --accent-tint:#FFF1E6;
  --c1:#175CD3;
  --c2:#12B3A0;
  --c3:#7A5AF8;
  --c4:#E8942B;
  --bg:#F6F8FC;
  --surface:#FFFFFF;
  --dark:#0B1730;
  --border:#E3E8F0;
  --divider:#EEF1F6;
  --t1:#0F172A;
  --t2:#475569;
  --t3:#94A3B8;
  --r8:8px;
  --r12:12px;
  --r16:16px;
  --r22:22px;
  --r999:999px;
  --sh1:0 1px 2px rgba(15,23,42,.06);
  --sh2:0 6px 20px -6px rgba(15,23,42,.12);
  --sh3:0 18px 40px -12px rgba(23,92,211,.22);
  --container:1240px;
  --sp:80px;
}
*,*::before,*::after{box-sizing:border-box;}
html,body{margin:0;padding:0;}
body{
  background:var(--bg);
  color:var(--t1);
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC",system-ui,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0;}
a{color:var(--brand);text-decoration:none;transition:color .18s ease;}
a:hover{color:var(--brand-hover);}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.25;color:var(--t1);}
h1{font-size:40px;}
h2{font-size:28px;}
h3{font-size:21px;}
h4{font-size:17px;font-weight:600;}
p{margin:0;}
button{font-family:inherit;cursor:pointer;}
input{font-family:inherit;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px;}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0;}
.container{width:100%;max-width:var(--container);margin:0 auto;padding-left:32px;padding-right:32px;}
.section{padding:var(--sp) 0;}
.section--tight{padding:56px 0;}
.section__head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:24px;
  margin-bottom:32px;
}
.section__head h2{margin-bottom:8px;}
.section__sub{font-size:14px;color:var(--t2);}
.section__link{font-size:14px;font-weight:600;color:var(--brand);white-space:nowrap;}

/* ---------- 顶部信息条 ---------- */
.topbar{
  background:var(--dark);
  color:rgba(255,255,255,.78);
  font-size:12.5px;
  max-height:40px;
  overflow:hidden;
  transition:max-height .3s ease;
}
.topbar__inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  min-height:34px;
}
.topbar__left{display:flex;align-items:center;gap:10px;}
.topbar__tag{
  display:inline-flex;
  align-items:center;
  height:20px;
  padding:0 10px;
  border-radius:var(--r999);
  background:rgba(255,122,47,.18);
  color:#FFB07A;
  font-weight:600;
  letter-spacing:.02em;
}
.topbar__right{display:flex;align-items:center;gap:18px;}
.topbar__right a{color:rgba(255,255,255,.78);}
.topbar__right a:hover{color:#fff;}
.topbar__dot{width:4px;height:4px;border-radius:50%;background:rgba(255,255,255,.35);display:inline-block;}

/* ---------- 头部与导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:120;
  background:var(--surface);
  border-bottom:1px solid var(--border);
  transition:box-shadow .25s ease, background .25s ease;
}
.site-header.is-scrolled{
  box-shadow:var(--sh2);
  background:rgba(255,255,255,.94);
  backdrop-filter:saturate(160%) blur(10px);
}
.site-header.is-scrolled .topbar{max-height:0;}
.header__inner{
  display:flex;
  align-items:center;
  gap:24px;
  min-height:68px;
}
.logo{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;color:var(--t1);}
.logo:hover{color:var(--t1);}
.logo__mark{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:36px;
  height:36px;
  border-radius:10px;
  background:linear-gradient(135deg,var(--brand) 0%,var(--brand-strong) 100%);
  color:#fff;
  font-size:13px;
  font-weight:700;
  letter-spacing:.04em;
}
.logo__text{font-size:18px;font-weight:700;letter-spacing:.01em;}
.main-nav{flex:1 1 auto;}
.main-nav ul{display:flex;align-items:center;gap:4px;}
.main-nav a{
  position:relative;
  display:inline-block;
  padding:22px 14px;
  font-size:15px;
  color:var(--t2);
  font-weight:500;
  white-space:nowrap;
}
.main-nav a::after{
  content:"";
  position:absolute;
  left:14px;
  right:14px;
  bottom:16px;
  height:2px;
  border-radius:2px;
  background:var(--brand);
  opacity:0;
  transform:scaleX(.4);
  transition:opacity .2s ease, transform .2s ease;
}
.main-nav a:hover{color:var(--brand);}
.main-nav a:hover::after{opacity:.55;transform:scaleX(1);}
.main-nav a.is-active{color:var(--brand);font-weight:600;}
.main-nav a.is-active::after{opacity:1;transform:scaleX(1);}
.main-nav .nav-cta-mobile{display:none;}
.header__actions{display:flex;align-items:center;gap:12px;margin-left:auto;}
.search-box{
  display:flex;
  align-items:center;
  gap:8px;
  height:40px;
  padding:0 14px;
  border:1px solid var(--border);
  border-radius:var(--r999);
  background:var(--bg);
  color:var(--t3);
  transition:border-color .18s ease, background .18s ease;
}
.search-box:focus-within{border-color:var(--brand);background:#fff;box-shadow:0 0 0 3px var(--brand-tint);}
.search-box i{font-size:13px;}
.search-box input{
  border:0;
  outline:0;
  background:transparent;
  width:150px;
  font-size:14px;
  color:var(--t1);
}
.search-box input::placeholder{color:var(--t3);}
.nav-toggle{
  display:none;
  width:42px;
  height:42px;
  border-radius:var(--r12);
  border:1px solid var(--border);
  background:#fff;
  color:var(--t1);
  font-size:16px;
}
.nav-backdrop{
  display:none;
  position:fixed;
  inset:0;
  background:rgba(11,23,48,.42);
  z-index:190;
}
.nav-backdrop.is-open{display:block;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:48px;
  padding:0 24px;
  border-radius:var(--r12);
  border:1px solid transparent;
  font-size:15px;
  font-weight:600;
  line-height:1;
  white-space:nowrap;
  transition:background .18s ease, color .18s ease, border-color .18s ease, transform .18s ease, box-shadow .18s ease;
}
.btn--sm{height:40px;padding:0 18px;font-size:14px;border-radius:10px;}
.btn--primary{background:var(--brand);color:#fff;box-shadow:var(--sh1);}
.btn--primary:hover{background:var(--brand-hover);color:#fff;transform:translateY(-1px);box-shadow:var(--sh2);}
.btn--primary:active{transform:translateY(0);box-shadow:var(--sh1);}
.btn--outline{background:transparent;border-color:var(--border);color:var(--brand);}
.btn--outline:hover{background:var(--brand-tint);border-color:var(--brand);color:var(--brand-strong);}
.btn--ghost{background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.5);color:#fff;}
.btn--ghost:hover{background:rgba(255,255,255,.18);color:#fff;border-color:#fff;}

/* ---------- 面包屑 ---------- */
.breadcrumb{font-size:13px;color:rgba(255,255,255,.72);}
.breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;}
.breadcrumb li{display:inline-flex;align-items:center;gap:8px;}
.breadcrumb li::after{content:"/";color:rgba(255,255,255,.4);}
.breadcrumb li:last-child::after{content:"";}
.breadcrumb a{color:rgba(255,255,255,.78);}
.breadcrumb a:hover{color:#fff;}
.breadcrumb [aria-current="page"]{color:#fff;font-weight:600;}

/* ---------- Hero ---------- */
.hero{
  position:relative;
  color:#fff;
  background-image:url("/assets/images/backpic/back-1.png");
  background-size:cover;
  background-position:center;
  overflow:hidden;
}
.hero::before{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(105deg,rgba(11,23,48,.9) 0%,rgba(11,23,48,.72) 48%,rgba(23,92,211,.5) 100%);
}
.hero__inner{
  position:relative;
  z-index:2;
  padding:56px 0 72px;
  max-width:780px;
}
.hero h1{color:#fff;margin:18px 0 16px;font-size:44px;letter-spacing:.01em;}
.hero__lead{
  font-size:17px;
  line-height:1.85;
  color:rgba(255,255,255,.86);
  margin-bottom:22px;
}
.hero__tags{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:28px;}
.hero__tags span{
  display:inline-flex;
  align-items:center;
  height:30px;
  padding:0 14px;
  border-radius:var(--r999);
  background:rgba(255,255,255,.14);
  border:1px solid rgba(255,255,255,.22);
  font-size:13px;
  color:rgba(255,255,255,.92);
}
.hero__actions{display:flex;flex-wrap:wrap;gap:14px;}

/* ---------- 数据条 ---------- */
.stats{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:20px;
}
.stat{
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:var(--r16);
  padding:22px 24px;
  box-shadow:var(--sh1);
  transition:box-shadow .2s ease, transform .2s ease;
}
.stat:hover{box-shadow:var(--sh2);transform:translateY(-3px);}
.stat__num{font-size:30px;font-weight:700;color:var(--brand);line-height:1.2;}
.stat__num small{font-size:15px;font-weight:600;margin-left:4px;color:var(--t2);}
.stat__label{font-size:14px;color:var(--t2);margin-top:6px;}

/* ---------- 横滑轨道 ---------- */
.rail-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:24px;
  margin-bottom:26px;
}
.rail-head h2{margin-bottom:8px;}
.rail-nav{display:flex;gap:10px;}
.rail-btn{
  width:40px;
  height:40px;
  border-radius:50%;
  border:1px solid var(--border);
  background:#fff;
  color:var(--t2);
  font-size:14px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  transition:background .18s ease,color .18s ease,border-color .18s ease,transform .18s ease;
}
.rail-btn:hover{background:var(--brand);border-color:var(--brand);color:#fff;transform:translateY(-2px);}
.rail-btn:active{transform:translateY(0);}
.rail{
  display:flex;
  gap:20px;
  overflow-x:auto;
  scroll-snap-type:x mandatory;
  padding:6px 4px 20px;
  scrollbar-width:none;
  -ms-overflow-style:none;
}
.rail::-webkit-scrollbar{display:none;}
.rail__item{
  flex:0 0 292px;
  scroll-snap-align:start;
  display:flex;
}
.rail--compact .rail__item{flex:0 0 244px;}

/* ---------- 媒体卡片 ---------- */
.mcard{
  position:relative;
  display:flex;
  flex-direction:column;
  width:100%;
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:var(--r16);
  box-shadow:var(--sh1);
  overflow:hidden;
  transition:transform .22s ease, box-shadow .22s ease, border-color .22s ease;
}
.mcard:hover{transform:translateY(-4px);box-shadow:var(--sh2);border-color:#D5DEEE;}
.mcard__fig{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--brand-tint);}
.mcard__fig img{width:100%;height:100%;object-fit:cover;transition:transform .45s ease;}
.mcard:hover .mcard__fig img{transform:scale(1.05);}
.mcard__idx{
  position:absolute;
  left:12px;
  top:12px;
  min-width:30px;
  height:26px;
  padding:0 10px;
  border-radius:var(--r999);
  background:rgba(11,23,48,.72);
  color:#fff;
  font-size:12px;
  font-weight:600;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  letter-spacing:.02em;
}
.mcard__body{padding:18px 20px 20px;display:flex;flex-direction:column;gap:10px;flex:1;}
.mcard__title{font-size:17px;font-weight:600;line-height:1.45;color:var(--t1);}
.mcard__title a{color:inherit;}
.mcard__title a:hover{color:var(--brand);}
.mcard__desc{font-size:14px;line-height:1.72;color:var(--t2);}
.mcard__meta{
  display:flex;
  align-items:center;
  gap:10px;
  font-size:12.5px;
  color:var(--t3);
}
.mcard__link{
  margin-top:auto;
  padding-top:6px;
  font-size:13px;
  font-weight:600;
  color:var(--brand);
  display:inline-flex;
  align-items:center;
  gap:6px;
}
.mcard__link i{font-size:11px;transition:transform .2s ease;}
.mcard:hover .mcard__link i{transform:translateX(3px);}

/* ---------- 徽章 ---------- */
.badge{
  display:inline-flex;
  align-items:center;
  height:24px;
  padding:0 10px;
  border-radius:var(--r999);
  font-size:12px;
  font-weight:600;
  white-space:nowrap;
  background:var(--brand-tint);
  color:var(--brand);
}
.badge--c1{background:rgba(23,92,211,.1);color:var(--c1);}
.badge--c2{background:rgba(18,179,160,.12);color:#0E8F80;}
.badge--c3{background:rgba(122,90,248,.12);color:#6544E8;}
.badge--c4{background:rgba(232,148,43,.14);color:#B96F14;}
.badge--accent{background:var(--accent-tint);color:#C1541A;}

/* ---------- 步骤 ---------- */
.steps{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:22px;
}
.step{
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:var(--r16);
  padding:26px 24px;
  box-shadow:var(--sh1);
  transition:transform .2s ease, box-shadow .2s ease;
}
.step:hover{transform:translateY(-3px);box-shadow:var(--sh2);}
.step__num{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:38px;
  height:38px;
  border-radius:var(--r12);
  background:var(--brand-tint);
  color:var(--brand);
  font-weight:700;
  font-size:15px;
  margin-bottom:16px;
}
.step h3{font-size:18px;margin-bottom:10px;}
.step p{font-size:14px;color:var(--t2);line-height:1.75;}

/* ---------- 场景卡 ---------- */
.scard{
  display:flex;
  flex-direction:column;
  width:100%;
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:var(--r16);
  box-shadow:var(--sh1);
  overflow:hidden;
  transition:transform .22s ease, box-shadow .22s ease;
}
.scard:hover{transform:translateY(-4px);box-shadow:var(--sh2);}
.scard__fig{aspect-ratio:3/2;overflow:hidden;background:var(--brand-tint);}
.scard__fig img{width:100%;height:100%;object-fit:cover;transition:transform .45s ease;}
.scard:hover .scard__fig img{transform:scale(1.05);}
.scard__body{padding:16px 18px 18px;display:flex;flex-direction:column;gap:8px;flex:1;}
.scard__body h3{font-size:16px;font-weight:600;line-height:1.45;}
.scard__body p{font-size:13.5px;color:var(--t2);line-height:1.7;}

/* ---------- FAQ ---------- */
.faq{max-width:900px;margin:0 auto;}
.faq__item{
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:var(--r12);
  margin-bottom:12px;
  overflow:hidden;
  box-shadow:var(--sh1);
  transition:border-color .2s ease, box-shadow .2s ease;
}
.faq__item.is-open{border-color:#CFDDF5;box-shadow:var(--sh2);}
.faq__q{
  width:100%;
  min-height:56px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:14px 22px;
  background:none;
  border:0;
  text-align:left;
  font-size:16px;
  font-weight:600;
  color:var(--t1);
}
.faq__q:hover{color:var(--brand);}
.faq__icon{
  flex:0 0 auto;
  width:26px;
  height:26px;
  border-radius:50%;
  background:var(--brand-tint);
  color:var(--brand);
  display:inline-flex;
  align-items:center;
  justify-content:center;
  font-size:11px;
  transition:transform .22s ease, background .22s ease, color .22s ease;
}
.faq__item.is-open .faq__icon{transform:rotate(180deg);background:var(--brand);color:#fff;}
.faq__a{max-height:0;overflow:hidden;transition:max-height .25s ease;}
.faq__a p{
  padding:0 22px 20px;
  font-size:15px;
  line-height:1.8;
  color:var(--t2);
}

/* ---------- CTA 带 ---------- */
.cta{
  position:relative;
  color:#fff;
  background-image:url("/assets/images/backpic/back-3.png");
  background-size:cover;
  background-position:center;
  overflow:hidden;
}
.cta::before{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(100deg,rgba(11,23,48,.94) 0%,rgba(11,23,48,.8) 52%,rgba(15,63,150,.68) 100%);
}
.cta__inner{
  position:relative;
  z-index:2;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:32px;
  padding:64px 0;
}
.cta h2{color:#fff;font-size:30px;margin-bottom:12px;}
.cta p{font-size:15px;color:rgba(255,255,255,.82);max-width:620px;}
.cta__actions{display:flex;gap:14px;flex-wrap:wrap;}

/* ---------- 相关分类 ---------- */
.linkgrid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:22px;
}
.linkcard{
  display:flex;
  align-items:center;
  gap:18px;
  padding:22px 24px;
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:var(--r16);
  box-shadow:var(--sh1);
  color:var(--t1);
  transition:transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.linkcard:hover{transform:translateY(-3px);box-shadow:var(--sh2);border-color:#D5DEEE;color:var(--t1);}
.linkcard__ico{
  flex:0 0 auto;
  width:46px;
  height:46px;
  border-radius:var(--r12);
  display:inline-flex;
  align-items:center;
  justify-content:center;
  font-size:17px;
  color:#fff;
}
.linkcard__ico--c2{background:var(--c2);}
.linkcard__ico--c3{background:var(--c3);}
.linkcard__ico--c4{background:var(--c4);}
.linkcard__txt strong{display:block;font-size:16px;font-weight:600;margin-bottom:4px;}
.linkcard__txt span{font-size:13px;color:var(--t2);}
.linkcard__arrow{margin-left:auto;color:var(--t3);font-size:13px;transition:transform .2s ease,color .2s ease;}
.linkcard:hover .linkcard__arrow{transform:translateX(4px);color:var(--brand);}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--dark);color:rgba(255,255,255,.72);padding:64px 0 0;}
.footer__grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1fr;
  gap:40px;
  padding-bottom:44px;
}
.footer__brand{display:flex;align-items:center;gap:10px;color:#fff;font-size:17px;font-weight:700;margin-bottom:16px;}
.footer__brand .logo__mark{width:34px;height:34px;font-size:12px;}
.footer__desc{font-size:13.5px;line-height:1.85;color:rgba(255,255,255,.6);max-width:340px;}
.footer__title{font-size:14px;font-weight:600;color:#fff;margin-bottom:16px;}
.footer__list li{margin-bottom:10px;}
.footer__list a{font-size:13.5px;color:rgba(255,255,255,.66);display:inline-block;transition:color .18s ease, transform .18s ease;}
.footer__list a:hover{color:#fff;transform:translateX(2px);}
.footer__bottom{
  border-top:1px solid rgba(255,255,255,.1);
  padding:20px 0 26px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  font-size:13px;
  color:rgba(255,255,255,.52);
}

/* ---------- 响应式 ---------- */
@media (max-width:1199px){
  .hero h1{font-size:40px;}
  .main-nav a{padding:22px 11px;font-size:14.5px;}
  .search-box input{width:118px;}
}
@media (max-width:991px){
  :root{--sp:56px;}
  .container{padding-left:24px;padding-right:24px;}
  h1{font-size:34px;}
  h2{font-size:24px;}
  .nav-toggle{display:inline-flex;align-items:center;justify-content:center;}
  .search-box{display:none;}
  .main-nav{
    position:fixed;
    top:0;
    right:0;
    z-index:200;
    width:min(360px,88vw);
    height:100%;
    background:#fff;
    box-shadow:-16px 0 40px -20px rgba(15,23,42,.4);
    transform:translateX(102%);
    transition:transform .28s ease;
    padding:24px 20px 32px;
    overflow-y:auto;
    flex:0 0 auto;
  }
  .main-nav.is-open{transform:translateX(0);}
  .main-nav ul{
    display:grid;
    grid-template-columns:repeat(2,1fr);
    gap:12px;
  }
  .main-nav a{
    display:block;
    padding:14px 12px;
    background:var(--bg);
    border:1px solid var(--border);
    border-radius:var(--r12);
    font-size:14px;
    text-align:center;
  }
  .main-nav a::after{display:none;}
  .main-nav a.is-active{background:var(--brand-tint);border-color:#CFDDF5;color:var(--brand);}
  .main-nav .nav-cta-mobile{display:block;grid-column:1 / -1;margin-top:8px;}
  .main-nav .nav-cta-mobile a{
    background:var(--brand);
    border-color:var(--brand);
    color:#fff;
    font-weight:600;
  }
  .main-nav .nav-cta-mobile a:hover{background:var(--brand-hover);color:#fff;}
  .hero__inner{padding:44px 0 56px;}
  .hero h1{font-size:32px;}
  .hero__lead{font-size:15.5px;}
  .stats{grid-template-columns:repeat(2,1fr);}
  .steps{grid-template-columns:1fr;}
  .linkgrid{grid-template-columns:1fr;}
  .cta__inner{flex-direction:column;align-items:flex-start;padding:52px 0;}
  .footer__grid{grid-template-columns:1fr 1fr;gap:32px;}
  .footer__desc{max-width:none;}
}
@media (max-width:767px){
  :root{--sp:44px;}
  .container{padding-left:16px;padding-right:16px;}
  h1{font-size:28px;}
  h2{font-size:22px;}
  h3{font-size:18px;}
  .topbar{font-size:12px;}
  .topbar__right{display:none;}
  .header__inner{min-height:60px;gap:12px;}
  .logo__text{font-size:16px;}
  .hero__inner{padding:34px 0 44px;}
  .hero h1{font-size:28px;margin:14px 0 12px;}
  .hero__lead{font-size:15px;}
  .hero__actions{gap:12px;}
  .hero__actions .btn{width:100%;}
  .section__head{flex-direction:column;align-items:flex-start;gap:12px;}
  .stats{grid-template-columns:1fr 1fr;gap:14px;}
  .stat{padding:18px;}
  .stat__num{font-size:24px;}
  .rail-head{flex-wrap:wrap;}
  .rail__item{flex:0 0 82%;}
  .rail--compact .rail__item{flex:0 0 74%;}
  .cta h2{font-size:23px;}
  .cta__actions .btn{width:100%;}
  .footer__grid{grid-template-columns:1fr;gap:28px;}
  .footer__bottom{flex-direction:column;align-items:flex-start;gap:8px;}
}
@media (max-width:420px){
  h1{font-size:25px;}
  .hero h1{font-size:25px;}
  .stat__num{font-size:21px;}
  .rail__item{flex:0 0 88%;}
  .btn{height:44px;padding:0 18px;font-size:14px;}
  .btn--sm{height:38px;font-size:13px;}
}

/* roulang page: category3 */
:root{
  --brand:#175CD3;
  --brand-strong:#0F3F96;
  --brand-hover:#3B7BE0;
  --brand-tint:#EAF1FD;
  --accent:#FF7A2F;
  --accent-tint:#FFF1E6;
  --c1:#175CD3;
  --c2:#12B3A0;
  --c3:#7A5AF8;
  --c4:#E8942B;
  --bg:#F6F8FC;
  --surface:#FFFFFF;
  --dark:#0B1730;
  --border:#E3E8F0;
  --divider:#EEF1F6;
  --t1:#0F172A;
  --t2:#475569;
  --t3:#94A3B8;
  --r8:8px;
  --r12:12px;
  --r16:16px;
  --r22:22px;
  --r999:999px;
  --sh1:0 1px 2px rgba(15,23,42,.06);
  --sh2:0 6px 20px -6px rgba(15,23,42,.12);
  --sh3:0 18px 40px -12px rgba(23,92,211,.22);
  --gutter:20px;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--t1);
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC",system-ui,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.3;color:var(--t1);}
p{margin:0;}
img{max-width:100%;display:block;border:0;}
a{color:var(--brand);text-decoration:none;transition:color .18s ease,background-color .18s ease,transform .18s ease;}
a:hover{color:var(--brand-hover);}
ul,ol{margin:0;padding:0;list-style:none;}
button{font-family:inherit;font-size:inherit;cursor:pointer;border:0;background:none;padding:0;appearance:none;-webkit-appearance:none;line-height:1.4;}
input{font-family:inherit;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;}

.container{width:100%;max-width:1240px;margin:0 auto;padding:0 32px;}

/* ===== 头部导航 ===== */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(255,255,255,.96);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--border);
  transition:box-shadow .25s ease;
}
.site-header.is-scrolled{box-shadow:var(--sh2);}
.header__inner{display:flex;align-items:center;gap:24px;height:68px;}
.logo{display:inline-flex;align-items:center;gap:10px;color:var(--t1);font-weight:700;flex-shrink:0;}
.logo:hover{color:var(--brand);}
.logo__mark{
  width:34px;height:34px;border-radius:10px;
  background:linear-gradient(135deg,var(--brand),var(--brand-strong));
  color:#fff;font-size:13px;font-weight:700;letter-spacing:.5px;
  display:inline-flex;align-items:center;justify-content:center;flex-shrink:0;
}
.logo__text{font-size:18px;letter-spacing:.2px;}
.main-nav{margin-left:auto;}
.main-nav ul{display:flex;align-items:center;gap:4px;}
.main-nav a{position:relative;display:inline-block;padding:8px 12px;color:var(--t2);font-size:15px;border-radius:var(--r8);}
.main-nav a::after{
  content:"";position:absolute;left:12px;right:12px;bottom:0;height:2px;border-radius:2px;
  background:var(--brand);transform:scaleX(0);transform-origin:left;transition:transform .2s ease;
}
.main-nav a:hover{color:var(--brand);}
.main-nav a:hover::after{transform:scaleX(1);}
.main-nav a.is-active{color:var(--brand);font-weight:600;}
.main-nav a.is-active::after{transform:scaleX(1);}
.header__actions{display:flex;align-items:center;gap:12px;flex-shrink:0;}
.search-box{position:relative;display:flex;align-items:center;}
.search-box i{position:absolute;left:13px;color:var(--t3);font-size:13px;pointer-events:none;}
.search-box input{
  width:180px;height:40px;padding:0 14px 0 34px;
  border:1px solid var(--border);border-radius:var(--r999);
  background:#fff;font-size:13px;color:var(--t1);
  transition:border-color .18s,box-shadow .18s;
}
.search-box input::placeholder{color:var(--t3);}
.search-box input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-tint);}
.sr-only{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden;}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--r12);
  font-size:15px;font-weight:600;border:1px solid transparent;
  transition:background-color .18s ease,color .18s ease,transform .18s ease,box-shadow .18s ease,border-color .18s ease;
  white-space:nowrap;
}
.btn--primary{background:var(--brand);color:#fff;box-shadow:var(--sh1);}
.btn--primary:hover{background:var(--brand-hover);color:#fff;transform:translateY(-1px);box-shadow:var(--sh2);}
.btn--primary:active{transform:translateY(0);box-shadow:var(--sh1);}
.btn--ghost{background:transparent;color:var(--brand);border-color:var(--brand);}
.btn--ghost:hover{background:var(--brand-tint);color:var(--brand-strong);border-color:var(--brand-strong);}
.btn--on-dark{background:rgba(255,255,255,.08);color:#fff;border-color:rgba(255,255,255,.45);}
.btn--on-dark:hover{background:rgba(255,255,255,.18);color:#fff;border-color:#fff;}
.btn--sm{height:40px;padding:0 18px;font-size:14px;border-radius:var(--r8);}
.nav-toggle{
  display:none;width:40px;height:40px;border-radius:var(--r8);
  color:var(--t1);font-size:18px;align-items:center;justify-content:center;
}
.nav-toggle:hover{background:var(--brand-tint);color:var(--brand);}

/* ===== 面包屑 ===== */
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--t3);padding-top:20px;}
.breadcrumb li{display:flex;align-items:center;gap:8px;}
.breadcrumb li + li::before{content:"/";color:var(--t3);}
.breadcrumb a{color:var(--t3);}
.breadcrumb a:hover{color:var(--brand);}
.breadcrumb [aria-current]{color:var(--t2);}

/* ===== 首屏 ===== */
.page-hero{padding-bottom:8px;}
.hero-grid{display:grid;grid-template-columns:1.55fr 1fr;gap:var(--gutter);margin-top:22px;}
.hero-main{
  position:relative;overflow:hidden;
  background:var(--surface);border:1px solid var(--border);border-radius:var(--r22);
  padding:40px 40px 36px;box-shadow:var(--sh2);
}
.hero-main::after{
  content:"";position:absolute;right:-70px;top:-70px;width:240px;height:240px;border-radius:50%;
  background:radial-gradient(circle,rgba(23,92,211,.14),rgba(23,92,211,0) 70%);
}
.hero-main > *{position:relative;z-index:1;}
.hero-main .badge{margin-bottom:18px;}
.page-title{font-size:38px;line-height:1.24;letter-spacing:-.4px;}
.hero-lead{margin-top:16px;font-size:16px;color:var(--t2);max-width:640px;line-height:1.8;}
.tag-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px;}
.tag{
  display:inline-flex;align-items:center;height:30px;padding:0 14px;border-radius:var(--r999);
  background:var(--brand-tint);color:var(--brand-strong);font-size:13px;font-weight:500;white-space:nowrap;
}
.tag--accent{background:var(--accent-tint);color:#C4560F;}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px;}
.hero-side{display:grid;grid-template-rows:1fr 1fr;gap:var(--gutter);}
.mini-card{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--r16);
  padding:22px;box-shadow:var(--sh1);transition:box-shadow .22s ease,transform .22s ease;
}
.mini-card:hover{box-shadow:var(--sh2);transform:translateY(-3px);}
.mini-card h3{font-size:17px;line-height:1.4;}
.mini-card ul{margin-top:14px;display:grid;gap:9px;}
.mini-card li{position:relative;padding-left:18px;font-size:14px;color:var(--t2);line-height:1.65;}
.mini-card li::before{content:"";position:absolute;left:0;top:9px;width:6px;height:6px;border-radius:50%;background:var(--brand);}
.mini-card--alt li::before{background:var(--c2);}

/* ===== 通用板块 ===== */
.section{padding-top:80px;}
.section__head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:28px;}
.section__eyebrow{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:var(--r999);
  background:var(--brand-tint);color:var(--brand-strong);font-size:12px;font-weight:600;letter-spacing:.4px;margin-bottom:14px;
}
.section__title{font-size:28px;line-height:1.3;}
.section__desc{margin-top:10px;color:var(--t2);font-size:15px;max-width:760px;line-height:1.8;}
.link-more{font-size:14px;font-weight:600;color:var(--brand);display:inline-flex;align-items:center;gap:6px;white-space:nowrap;}
.link-more:hover{gap:10px;}

.badge{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:var(--r999);
  font-size:12px;font-weight:600;white-space:nowrap;background:var(--brand-tint);color:var(--brand);
}
.badge--c1{background:rgba(23,92,211,.10);color:#154FB5;}
.badge--c2{background:rgba(18,179,160,.14);color:#0C8175;}
.badge--c3{background:rgba(122,90,248,.13);color:#5B3EDB;}
.badge--c4{background:rgba(232,148,43,.16);color:#B96E12;}
.badge--accent{background:var(--accent-tint);color:#C4560F;}

/* ===== Bento 卡片墙 ===== */
.bento{display:grid;grid-template-columns:repeat(12,1fr);gap:var(--gutter);}
.span-3{grid-column:span 3;}
.span-4{grid-column:span 4;}
.span-5{grid-column:span 5;}
.span-6{grid-column:span 6;}
.span-7{grid-column:span 7;}
.ecard{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--r16);
  overflow:hidden;box-shadow:var(--sh1);display:flex;flex-direction:column;height:100%;
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.ecard:hover{transform:translateY(-4px);box-shadow:var(--sh2);border-color:#D5DEEC;}
.ecard__media{position:relative;aspect-ratio:16 / 9;overflow:hidden;background:var(--brand-tint);}
.ecard__media img{width:100%;height:100%;object-fit:cover;transition:transform .45s ease;}
.ecard:hover .ecard__media img{transform:scale(1.045);}
.ecard__flag{
  position:absolute;left:14px;top:14px;height:26px;padding:0 10px;border-radius:var(--r999);
  background:rgba(11,23,48,.72);color:#fff;font-size:12px;display:inline-flex;align-items:center;font-weight:500;
}
.ecard__body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:10px;flex:1;}
.ecard__title{font-size:18px;font-weight:600;line-height:1.4;}
.ecard__text{font-size:14px;color:var(--t2);line-height:1.75;flex:1;}
.ecard__meta{margin-top:auto;display:flex;align-items:center;gap:10px;font-size:13px;color:var(--t3);}
.ecard--tone{background:linear-gradient(158deg,rgba(18,179,160,.11),rgba(18,179,160,.02) 72%);border-color:rgba(18,179,160,.26);}
.ecard--tone-3{background:linear-gradient(158deg,rgba(122,90,248,.11),rgba(122,90,248,.02) 72%);border-color:rgba(122,90,248,.26);}
.ecard--tone-4{background:linear-gradient(158deg,rgba(232,148,43,.13),rgba(232,148,43,.02) 72%);border-color:rgba(232,148,43,.3);}
.ecard__icon{
  width:46px;height:46px;border-radius:var(--r12);display:inline-flex;align-items:center;justify-content:center;
  font-size:18px;background:#fff;color:var(--c2);box-shadow:var(--sh1);margin-bottom:4px;
}
.ecard--tone-3 .ecard__icon{color:var(--c3);}
.ecard--tone-4 .ecard__icon{color:var(--c4);}

/* ===== 场景区 ===== */
.scene-list{display:grid;gap:var(--gutter);}
.scene{
  display:grid;grid-template-columns:1fr 1fr;gap:32px;align-items:center;
  background:var(--surface);border:1px solid var(--border);border-radius:var(--r22);
  padding:28px;box-shadow:var(--sh1);transition:box-shadow .22s ease;
}
.scene:hover{box-shadow:var(--sh2);}
.scene--rev .scene__text{order:2;}
.scene__text h3{font-size:21px;line-height:1.4;margin-bottom:12px;}
.scene__text p{font-size:15px;color:var(--t2);line-height:1.8;}
.scene__list{margin-top:16px;display:grid;gap:8px;}
.scene__list li{position:relative;padding-left:20px;font-size:14px;color:var(--t2);}
.scene__list li::before{
  content:"";position:absolute;left:0;top:8px;width:8px;height:8px;border-radius:3px;
  background:var(--brand-tint);border:2px solid var(--brand);
}
.scene__media img{width:100%;aspect-ratio:3 / 2;object-fit:cover;border-radius:var(--r16);}

/* ===== 数据卡 ===== */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:var(--gutter);}
.stat{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--r16);
  padding:24px;box-shadow:var(--sh1);transition:transform .22s ease,box-shadow .22s ease;
}
.stat:hover{transform:translateY(-3px);box-shadow:var(--sh2);}
.stat__num{font-size:34px;font-weight:700;color:var(--brand);letter-spacing:-1px;line-height:1.1;}
.stat__num span{font-size:15px;font-weight:600;color:var(--t2);margin-left:4px;letter-spacing:0;}
.stat__label{margin-top:8px;font-size:14px;color:var(--t2);line-height:1.7;}

/* ===== 排查步骤 ===== */
.steps{
  display:grid;grid-template-columns:repeat(4,1fr);
  background:var(--surface);border:1px solid var(--border);border-radius:var(--r22);
  overflow:hidden;box-shadow:var(--sh1);
}
.step{padding:28px 24px;border-right:1px solid var(--divider);transition:background-color .2s ease;}
.step:last-child{border-right:0;}
.step:hover{background:var(--brand-tint);}
.step__index{font-size:13px;font-weight:700;color:var(--brand);letter-spacing:1.2px;}
.step__title{margin-top:12px;font-size:17px;font-weight:600;}
.step__text{margin-top:8px;font-size:14px;color:var(--t2);line-height:1.75;}

/* ===== FAQ ===== */
.faq{max-width:900px;margin:0 auto;display:grid;gap:12px;}
.faq__item{background:var(--surface);border:1px solid var(--border);border-radius:var(--r16);box-shadow:var(--sh1);overflow:hidden;transition:border-color .2s ease;}
.faq__item.is-open{border-color:#CBD9EE;}
.faq__q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:0 22px;min-height:56px;font-size:16px;font-weight:600;color:var(--t1);text-align:left;line-height:1.5;
}
.faq__q:hover{color:var(--brand);}
.faq__q i{transition:transform .22s ease;color:var(--t3);font-size:14px;flex-shrink:0;}
.faq__item.is-open .faq__q i{transform:rotate(180deg);color:var(--brand);}
.faq__a{max-height:0;overflow:hidden;transition:max-height .26s ease;}
.faq__a p{padding:0 22px 20px;font-size:15px;color:var(--t2);line-height:1.85;}

/* ===== CTA 带 ===== */
.cta-band{
  margin-top:80px;position:relative;
  background-color:var(--dark);
  background-image:url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;
}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(11,23,48,.95),rgba(11,23,48,.74) 62%,rgba(11,23,48,.6));
}
.cta-band__inner{position:relative;display:flex;align-items:center;justify-content:space-between;gap:36px;padding:60px 0;}
.cta-band h2{font-size:28px;color:#fff;line-height:1.35;}
.cta-band p{margin-top:12px;color:rgba(255,255,255,.74);font-size:15px;max-width:620px;line-height:1.8;}
.cta-band__actions{display:flex;gap:12px;flex-shrink:0;flex-wrap:wrap;}

/* ===== 相关分类横滑 ===== */
.rail{display:flex;gap:var(--gutter);overflow-x:auto;padding:4px 4px 16px;scroll-snap-type:x mandatory;}
.rail::-webkit-scrollbar{height:6px;}
.rail::-webkit-scrollbar-thumb{background:#D7DFEC;border-radius:var(--r999);}
.rail > *{flex:0 0 300px;scroll-snap-align:start;}
.cat-card{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--r16);
  padding:22px;box-shadow:var(--sh1);display:flex;flex-direction:column;gap:10px;color:var(--t1);height:100%;
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.cat-card:hover{transform:translateY(-4px);box-shadow:var(--sh2);border-color:#CBD9EE;color:var(--brand);}
.cat-card__icon{
  width:42px;height:42px;border-radius:var(--r12);display:inline-flex;align-items:center;justify-content:center;
  background:var(--brand-tint);color:var(--brand);font-size:17px;
}
.cat-card h3{font-size:17px;font-weight:600;color:inherit;}
.cat-card p{font-size:14px;color:var(--t2);line-height:1.7;flex:1;}
.cat-card__more{font-size:13px;font-weight:600;color:var(--brand);display:inline-flex;align-items:center;gap:6px;}
.back-row{margin-top:24px;display:flex;flex-wrap:wrap;gap:18px;font-size:14px;}

/* ===== 页脚 ===== */
.site-footer{background:var(--dark);color:rgba(255,255,255,.72);margin-top:80px;padding-top:64px;}
.footer__grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px;padding-bottom:48px;}
.footer__brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:700;font-size:18px;}
.footer__brand .logo__mark{background:linear-gradient(135deg,var(--brand),var(--brand-hover));}
.footer__desc{margin-top:16px;font-size:14px;line-height:1.85;color:rgba(255,255,255,.62);max-width:370px;}
.footer__title{font-size:14px;font-weight:600;color:#fff;margin-bottom:16px;}
.footer__list{display:grid;gap:11px;}
.footer__list a{font-size:13px;color:rgba(255,255,255,.66);display:inline-block;transition:color .18s ease,transform .18s ease;}
.footer__list a:hover{color:#fff;transform:translateX(2px);}
.footer__bottom{
  border-top:1px solid rgba(255,255,255,.12);padding:20px 0;
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:rgba(255,255,255,.5);
}

/* ===== 响应式 ===== */
@media (max-width:1199px){
  .container{padding:0 24px;}
  .hero-grid{grid-template-columns:1.3fr 1fr;}
  .page-title{font-size:34px;}
  .bento{grid-template-columns:repeat(6,1fr);}
  .span-5,.span-7{grid-column:span 6;}
  .span-4,.span-3{grid-column:span 3;}
  .span-6{grid-column:span 6;}
  .scene{gap:24px;padding:24px;}
}

@media (max-width:991px){
  .main-nav{
    position:fixed;left:0;right:0;top:68px;
    background:#fff;border-bottom:1px solid var(--border);box-shadow:var(--sh2);
    padding:12px 16px 18px;display:none;max-height:calc(100vh - 68px);overflow-y:auto;
  }
  .main-nav.is-open{display:block;}
  .main-nav ul{flex-direction:column;align-items:stretch;gap:4px;}
  .main-nav a{padding:12px;font-size:15px;border-radius:var(--r8);}
  .main-nav a::after{display:none;}
  .main-nav a.is-active{background:var(--brand-tint);}
  .nav-toggle{display:inline-flex;}
  .search-box{display:none;}

  .hero-grid{grid-template-columns:1fr;}
  .hero-side{grid-template-rows:none;grid-template-columns:1fr 1fr;}
  .hero-main{padding:32px 28px 30px;}
  .page-title{font-size:30px;}
  .section{padding-top:56px;}

  .bento{grid-template-columns:repeat(2,1fr);}
  .span-3,.span-4,.span-5,.span-6,.span-7{grid-column:span 1;}
  .stats{grid-template-columns:repeat(2,1fr);}
  .steps{grid-template-columns:repeat(2,1fr);}
  .step{border-right:1px solid var(--divider);border-bottom:1px solid var(--divider);}
  .step:nth-child(2n){border-right:0;}
  .step:nth-last-child(-n+2){border-bottom:0;}
  .scene{grid-template-columns:1fr;gap:20px;}
  .scene--rev .scene__text{order:0;}
  .cta-band__inner{flex-direction:column;align-items:flex-start;padding:48px 0;gap:24px;}
  .footer__grid{grid-template-columns:1fr 1fr;gap:32px;}
}

@media (max-width:767px){
  .container{padding:0 16px;}
  .header__inner{height:56px;gap:12px;}
  .main-nav{top:56px;max-height:calc(100vh - 56px);}
  .logo__text{font-size:16px;}
  .page-title{font-size:26px;}
  .hero-lead{font-size:15px;}
  .hero-main{padding:26px 20px 24px;border-radius:var(--r16);}
  .hero-main::after{width:160px;height:160px;right:-50px;top:-50px;}
  .hero-side{grid-template-columns:1fr;}
  .section{padding-top:44px;}
  .section__head{flex-direction:column;align-items:flex-start;gap:12px;margin-bottom:22px;}
  .section__title{font-size:23px;}
  .bento{grid-template-columns:1fr;gap:16px;}
  .span-3,.span-4,.span-5,.span-6,.span-7{grid-column:span 1;}
  .stats{grid-template-columns:1fr;gap:16px;}
  .steps{grid-template-columns:1fr;}
  .step{border-right:0;border-bottom:1px solid var(--divider);}
  .step:last-child{border-bottom:0;}
  .scene{padding:20px;border-radius:var(--r16);}
  .cta-band{margin-top:56px;}
  .cta-band__inner{padding:40px 0;}
  .cta-band h2{font-size:22px;}
  .cta-band__actions{width:100%;}
  .cta-band__actions .btn{flex:1 1 auto;}
  .rail > *{flex:0 0 260px;}
  .site-footer{margin-top:56px;padding-top:48px;}
  .footer__grid{grid-template-columns:1fr;gap:28px;padding-bottom:36px;}
  .footer__bottom{flex-direction:column;gap:8px;}
  .faq__q{padding:0 16px;font-size:15px;}
  .faq__a p{padding:0 16px 18px;font-size:14px;}
}

@media (max-width:520px){
  .header__actions .btn--primary{display:none;}
  .page-title{font-size:24px;}
  .tag{height:28px;padding:0 12px;font-size:12px;}
  .btn{height:44px;padding:0 18px;font-size:14px;}
  .btn--sm{height:38px;padding:0 16px;}
  .stat__num{font-size:28px;}
  .rail > *{flex:0 0 230px;}
}

/* roulang page: category2 */
:root{
  --brand:#175CD3;
  --brand-strong:#0F3F96;
  --brand-hover:#3B7BE0;
  --brand-tint:#EAF1FD;
  --accent:#FF7A2F;
  --accent-tint:#FFF1E6;
  --c1:#175CD3;
  --c2:#12B3A0;
  --c3:#7A5AF8;
  --c4:#E8942B;
  --bg:#F6F8FC;
  --surface:#FFFFFF;
  --dark:#0B1730;
  --border:#E3E8F0;
  --divider:#EEF1F6;
  --t1:#0F172A;
  --t2:#475569;
  --t3:#94A3B8;
  --r8:8px;
  --r12:12px;
  --r16:16px;
  --r22:22px;
  --r999:999px;
  --sh1:0 1px 2px rgba(15,23,42,.06);
  --sh2:0 6px 20px -6px rgba(15,23,42,.12);
  --sh3:0 18px 40px -12px rgba(23,92,211,.22);
  --font:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC",system-ui,"Segoe UI",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;padding:0;background:var(--bg);color:var(--t1);font-family:var(--font);font-size:16px;line-height:1.75;-webkit-font-smoothing:antialiased;overflow-x:hidden}
h1,h2,h3,h4,h5,h6,p,figure,blockquote,ul,ol,dl{margin:0;padding:0}
h1,h2,h3,h4,h5,h6{font-family:var(--font);font-weight:700;line-height:1.25;color:var(--t1);letter-spacing:0}
ul,ol{list-style:none}
a{color:inherit;text-decoration:none;transition:color .18s ease,background-color .18s ease,transform .18s ease}
img{max-width:100%;height:auto;display:block}
button{font-family:inherit;cursor:pointer;border:0;background:none}
input{font-family:inherit}
a:focus-visible,button:focus-visible,input:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);border:0}
.container{width:100%;max-width:1240px;margin:0 auto;padding-left:32px;padding-right:32px}

/* ---------- 顶部信息条 ---------- */
.topbar{background:var(--dark);color:rgba(255,255,255,.72);font-size:12.5px;line-height:34px}
.topbar__inner{display:flex;align-items:center;justify-content:space-between;gap:16px;height:34px}
.topbar__left{display:flex;align-items:center;gap:12px;min-width:0}
.topbar__tag{display:inline-flex;align-items:center;background:rgba(255,255,255,.12);color:#fff;font-weight:600;padding:0 10px;height:20px;border-radius:var(--r999);font-size:12px;letter-spacing:.02em}
.topbar__note{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;color:rgba(255,255,255,.66)}
.topbar__right{display:flex;align-items:center;gap:10px;white-space:nowrap}
.topbar__right a:hover{color:#fff}
.topbar__sep{width:1px;height:12px;background:rgba(255,255,255,.2)}
.topbar__cta{color:var(--accent);font-weight:600}

/* ---------- 主导航 ---------- */
.site-header{position:sticky;top:0;z-index:80;background:#fff;border-bottom:1px solid var(--border);transition:box-shadow .22s ease,background-color .22s ease}
.site-header.is-stuck{box-shadow:var(--sh2);background:rgba(255,255,255,.94);backdrop-filter:saturate(180%) blur(10px);-webkit-backdrop-filter:saturate(180%) blur(10px)}
.header__inner{display:flex;align-items:center;justify-content:space-between;gap:22px;height:68px;position:relative}
.logo{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}
.logo__mark{width:34px;height:34px;border-radius:10px;background:linear-gradient(135deg,var(--brand) 0%,var(--brand-strong) 100%);color:#fff;font-size:13px;font-weight:700;display:inline-flex;align-items:center;justify-content:center;letter-spacing:.04em;flex:0 0 auto}
.logo__text{font-size:17px;font-weight:700;color:var(--t1);white-space:nowrap}
.main-nav{flex:1 1 auto;display:flex;justify-content:center}
.main-nav ul{display:flex;align-items:center;gap:2px}
.main-nav ul li a{position:relative;display:inline-block;padding:9px 14px;border-radius:var(--r8);color:var(--t2);font-size:15px;font-weight:500}
.main-nav ul li a::after{content:"";position:absolute;left:14px;right:14px;bottom:3px;height:2px;border-radius:2px;background:var(--brand);opacity:0;transition:opacity .2s ease}
.main-nav ul li a:hover{color:var(--brand);background:var(--brand-tint)}
.main-nav ul li a:hover::after{opacity:1}
.main-nav ul li a.is-active{color:var(--brand);font-weight:600}
.main-nav ul li a.is-active::after{opacity:1}
.main-nav .nav-drawer-cta{display:none}
.header__actions{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.search-box{position:relative;width:200px}
.search-box i{position:absolute;left:14px;top:50%;transform:translateY(-50%);color:var(--t3);font-size:13px}
.search-box input{width:100%;height:40px;border:1px solid var(--border);border-radius:var(--r999);padding:0 16px 0 34px;font-size:14px;color:var(--t1);background:#fff;transition:border-color .18s ease,box-shadow .18s ease,background-color .18s ease}
.search-box input::placeholder{color:var(--t3)}
.search-box input:focus{border-color:var(--brand);background:var(--brand-tint);box-shadow:0 0 0 3px rgba(23,92,211,.12);outline:none}
.nav-toggle{display:none;width:40px;height:40px;border-radius:10px;border:1px solid var(--border);background:#fff;color:var(--t2);align-items:center;justify-content:center;font-size:15px}
.nav-toggle:hover{color:var(--brand);border-color:var(--brand)}

/* ---------- 按钮 ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:48px;padding:0 24px;border-radius:var(--r12);font-size:15px;font-weight:600;border:1px solid transparent;transition:background-color .18s ease,color .18s ease,transform .18s ease,box-shadow .18s ease,border-color .18s ease;white-space:nowrap}
.btn i{font-size:13px}
.btn--primary{background:var(--brand);color:#fff;box-shadow:var(--sh1)}
.btn--primary:hover{background:var(--brand-hover);color:#fff;transform:translateY(-1px);box-shadow:var(--sh2)}
.btn--primary:active{transform:translateY(0);box-shadow:var(--sh1)}
.btn--outline{background:transparent;border-color:var(--border);color:var(--brand)}
.btn--outline:hover{background:var(--brand-tint);border-color:var(--brand);color:var(--brand-strong)}
.btn--ghost{background:transparent;border-color:rgba(255,255,255,.5);color:#fff}
.btn--ghost:hover{background:rgba(255,255,255,.14);border-color:#fff}
.btn--sm{height:40px;padding:0 18px;font-size:14px;border-radius:10px}
.btn--block{width:100%}

/* ---------- 面包屑 ---------- */
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--t3);margin-bottom:18px}
.crumb li{display:inline-flex;align-items:center;gap:8px}
.crumb li::after{content:"/";color:var(--t3);opacity:.7}
.crumb li:last-child::after{display:none}
.crumb a:hover{color:var(--brand)}
.crumb .is-current{color:var(--t2)}

/* ---------- 页面首屏 ---------- */
.page-hero{position:relative;background:url('/assets/images/backpic/back-1.png') center/cover no-repeat;border-bottom:1px solid var(--border);padding:44px 0 48px;overflow:hidden}
.page-hero::before{content:"";position:absolute;inset:0;background:linear-gradient(100deg,rgba(255,255,255,.95) 0%,rgba(246,248,252,.86) 50%,rgba(234,241,253,.74) 100%)}
.page-hero .container{position:relative;z-index:1}
.hero__eyebrow{display:inline-flex;align-items:center;gap:7px;background:var(--brand-tint);color:var(--brand);font-size:12px;font-weight:600;padding:5px 12px;border-radius:var(--r999);margin-bottom:16px}
.page-hero h1{font-size:40px;font-weight:700;letter-spacing:-.01em;margin-bottom:14px}
.hero__lead{font-size:17px;color:var(--t2);max-width:660px;line-height:1.8}
.hero__tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
.hero__actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}

/* ---------- 标签 / 徽章 ---------- */
.tag{display:inline-flex;align-items:center;gap:6px;height:28px;padding:0 13px;border-radius:var(--r999);font-size:12px;font-weight:600;background:var(--brand-tint);color:var(--brand);white-space:nowrap}
.tag--c1{background:rgba(23,92,211,.08);color:var(--c1)}
.tag--c2{background:rgba(18,179,160,.10);color:#0E8F80}
.tag--c3{background:rgba(122,90,248,.10);color:#6247DF}
.tag--c4{background:rgba(232,148,43,.12);color:#B66F14}
.tag--accent{background:var(--accent-tint);color:#C75A18}
.tag--muted{background:#EFF2F7;color:var(--t2)}
.badge{display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:var(--r999);font-size:12px;font-weight:600;background:var(--brand-tint);color:var(--brand);white-space:nowrap}

/* ---------- 双栏布局 ---------- */
.section{padding:56px 0}
.layout{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:36px;align-items:start}
.layout__main{min-width:0}
.layout__aside{min-width:0}
.block{margin-bottom:52px}
.block:last-child{margin-bottom:0}
.block__head{margin-bottom:24px}
.block__head h2{font-size:28px;margin-bottom:10px}
.block__sub{font-size:15px;color:var(--t2);max-width:680px;line-height:1.8}

/* ---------- 维度小卡 ---------- */
.mini-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--r16);padding:22px;height:100%;box-shadow:var(--sh1);transition:box-shadow .2s ease,transform .2s ease}
.mini-card:hover{box-shadow:var(--sh2);transform:translateY(-3px)}
.mini-card__icon{width:42px;height:42px;border-radius:12px;display:inline-flex;align-items:center;justify-content:center;font-size:16px;margin-bottom:14px}
.mini-card h3{font-size:18px;margin-bottom:8px}
.mini-card p{font-size:14px;color:var(--t2);line-height:1.8}

/* ---------- 频道清单（列表行） ---------- */
.channel-row{display:grid;grid-template-columns:190px minmax(0,1fr);gap:20px;background:var(--surface);border:1px solid var(--border);border-radius:var(--r16);padding:16px;box-shadow:var(--sh1);transition:box-shadow .2s ease,transform .2s ease,border-color .2s ease}
.channel-row + .channel-row{margin-top:16px}
.channel-row:hover{box-shadow:var(--sh2);transform:translateY(-2px);border-color:#D6DFEC}
.channel-row__thumb{border-radius:var(--r12);overflow:hidden;background:var(--brand-tint);position:relative}
.channel-row__thumb img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .35s ease}
.channel-row:hover .channel-row__thumb img{transform:scale(1.04)}
.channel-row__body{display:flex;flex-direction:column;justify-content:center;min-width:0}
.channel-row__top{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:8px}
.channel-row__body h3{font-size:19px;margin-bottom:8px}
.channel-row__body h3 a:hover{color:var(--brand)}
.channel-row__body p{font-size:14px;color:var(--t2);line-height:1.8;margin-bottom:12px}
.channel-row__meta{display:flex;align-items:center;gap:16px;flex-wrap:wrap;font-size:13px;color:var(--t3);margin-bottom:10px}
.channel-row__meta span{display:inline-flex;align-items:center;gap:6px}
.channel-row__link{font-size:14px;font-weight:600;color:var(--brand);display:inline-flex;align-items:center;gap:6px}
.channel-row__link:hover{color:var(--brand-strong);gap:10px}

/* ---------- 步骤 ---------- */
.steps{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.step{display:flex;gap:14px;background:var(--surface);border:1px solid var(--border);border-radius:var(--r16);padding:20px;box-shadow:var(--sh1);transition:box-shadow .2s ease,transform .2s ease}
.step:hover{box-shadow:var(--sh2);transform:translateY(-2px)}
.step__num{flex:0 0 auto;width:34px;height:34px;border-radius:50%;background:var(--brand-tint);color:var(--brand);font-weight:700;font-size:14px;display:inline-flex;align-items:center;justify-content:center}
.step h3{font-size:16px;margin-bottom:6px}
.step p{font-size:14px;color:var(--t2);line-height:1.8}

/* ---------- 侧栏 ---------- */
.side-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--r16);padding:20px;box-shadow:var(--sh1);margin-bottom:20px}
.side-card:last-child{margin-bottom:0}
.side-card__title{font-size:15px;font-weight:700;margin-bottom:14px;display:flex;align-items:center;gap:8px}
.side-card__title i{color:var(--brand);font-size:13px}
.side-nav li + li{margin-top:4px}
.side-nav a{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:9px 12px;border-radius:var(--r8);font-size:14px;color:var(--t2);transition:background-color .18s ease,color .18s ease,padding-left .18s ease}
.side-nav a:hover{background:var(--brand-tint);color:var(--brand);padding-left:16px}
.side-nav a i{font-size:11px;color:var(--t3)}
.side-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;text-align:center}
.side-stat{background:var(--bg);border-radius:var(--r12);padding:12px 6px}
.side-stat b{display:block;font-size:22px;font-weight:700;color:var(--brand);line-height:1.3}
.side-stat span{font-size:12px;color:var(--t3)}
.side-tags{display:flex;flex-wrap:wrap;gap:8px}
.side-cta{background:linear-gradient(150deg,var(--brand-strong) 0%,var(--brand) 100%);border:0;color:#fff}
.side-cta .side-card__title{color:#fff}
.side-cta .side-card__title i{color:rgba(255,255,255,.85)}
.side-cta p{font-size:13.5px;color:rgba(255,255,255,.8);line-height:1.8;margin-bottom:16px}
.side-cta .btn{background:#fff;color:var(--brand-strong)}
.side-cta .btn:hover{background:var(--accent-tint);color:var(--brand-strong)}
.layout__aside .is-sticky{position:sticky;top:96px}

/* ---------- FAQ ---------- */
.faq{max-width:900px}
.faq-item{background:var(--surface);border:1px solid var(--border);border-radius:var(--r12);margin-bottom:12px;overflow:hidden;transition:box-shadow .2s ease,border-color .2s ease}
.faq-item:hover{box-shadow:var(--sh1);border-color:#D6DFEC}
.faq-item.is-open{box-shadow:var(--sh2);border-color:#CDDCF6}
.faq-q{display:flex;align-items:center;justify-content:space-between;gap:16px;width:100%;text-align:left;padding:18px 20px;min-height:56px;font-size:16px;font-weight:600;color:var(--t1);background:transparent}
.faq-q i{color:var(--brand);font-size:13px;transition:transform .22s ease;flex:0 0 auto}
.faq-item.is-open .faq-q i{transform:rotate(180deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .25s ease;padding:0 20px}
.faq-a p{font-size:15px;color:var(--t2);line-height:1.85;padding-bottom:18px}

/* ---------- CTA 带 ---------- */
.cta-band{position:relative;background:url('/assets/images/backpic/back-3.png') center/cover no-repeat;color:#fff;padding:56px 0;margin-top:8px;overflow:hidden}
.cta-band::before{content:"";position:absolute;inset:0;background:linear-gradient(100deg,rgba(11,23,48,.94) 0%,rgba(15,63,150,.86) 100%)}
.cta-band .container{position:relative;z-index:1;display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap}
.cta-band h2{color:#fff;font-size:28px;margin-bottom:10px}
.cta-band p{color:rgba(255,255,255,.78);font-size:15px;max-width:560px;line-height:1.8}

/* ---------- 相关分类 ---------- */
.related-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px}
.related-card{display:block;background:var(--surface);border:1px solid var(--border);border-radius:var(--r16);padding:20px;box-shadow:var(--sh1);transition:box-shadow .2s ease,transform .2s ease,border-color .2s ease;height:100%}
.related-card:hover{box-shadow:var(--sh2);transform:translateY(-3px);border-color:#CDDCF6}
.related-card__idx{font-size:12px;font-weight:700;color:var(--t3);letter-spacing:.06em;margin-bottom:10px;display:block}
.related-card h3{font-size:17px;margin-bottom:8px;color:var(--t1)}
.related-card:hover h3{color:var(--brand)}
.related-card p{font-size:13.5px;color:var(--t2);line-height:1.75}
.related-card__more{margin-top:14px;font-size:13px;font-weight:600;color:var(--brand);display:inline-flex;align-items:center;gap:6px}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--dark);color:rgba(255,255,255,.72);padding:52px 0 0;margin-top:0}
.footer__grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1fr;gap:32px;padding-bottom:38px;border-bottom:1px solid rgba(255,255,255,.1)}
.footer__brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.footer__brand .logo__mark{width:32px;height:32px;font-size:12px}
.footer__brand span:last-child{font-size:16px;font-weight:700;color:#fff}
.footer__desc{font-size:13.5px;line-height:1.85;color:rgba(255,255,255,.6);max-width:340px}
.footer__title{font-size:14px;font-weight:600;color:#fff;margin-bottom:16px}
.footer__list li + li{margin-top:9px}
.footer__list a{display:inline-block;font-size:13px;color:rgba(255,255,255,.66);transition:color .18s ease,transform .18s ease}
.footer__list a:hover{color:#fff;transform:translateX(2px)}
.footer__bottom{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:10px;padding:20px 0;font-size:13px;color:rgba(255,255,255,.48)}

/* ---------- Foundation 兜底栅格 ---------- */
.grid-x{display:flex;flex-wrap:wrap}
.grid-x>.cell{flex:0 0 auto;width:100%}
.grid-margin-x{margin-left:-12px;margin-right:-12px}
.grid-margin-x>.cell{padding-left:12px;padding-right:12px}
.grid-margin-y{margin-top:-12px}
.grid-margin-y>.cell{padding-top:12px;padding-bottom:12px}
@media screen and (min-width:640px){
  .grid-x>.cell.medium-4{width:33.3333%}
  .grid-x>.cell.medium-6{width:50%}
}
@media screen and (min-width:1024px){
  .grid-x>.cell.large-4{width:33.3333%}
  .grid-x>.cell.large-6{width:50%}
  .grid-x>.cell.large-8{width:66.6667%}
}

/* ---------- 响应式 ---------- */
@media (max-width:1199px){
  .layout{grid-template-columns:minmax(0,1fr) 300px;gap:28px}
  .page-hero h1{font-size:36px}
}
@media (max-width:1024px){
  .layout{grid-template-columns:minmax(0,1fr)}
  .layout__aside .is-sticky{position:static}
  .related-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:991px){
  .container{padding-left:24px;padding-right:24px}
  .topbar{font-size:12px}
  .topbar__note{display:none}
  .main-nav{position:absolute;left:0;right:0;top:100%;background:#fff;border-bottom:1px solid var(--border);box-shadow:var(--sh2);display:none;padding:12px 24px 22px;max-height:calc(100vh - 102px);overflow-y:auto}
  .main-nav.is-open{display:block}
  .main-nav ul{flex-direction:column;align-items:stretch;gap:2px}
  .main-nav ul li a{display:block;padding:13px 14px;border-radius:10px;font-size:15px}
  .main-nav ul li a::after{display:none}
  .main-nav ul li a.is-active{background:var(--brand-tint)}
  .main-nav .nav-drawer-cta{display:block;margin-top:12px;padding-top:14px;border-top:1px solid var(--divider)}
  .main-nav .nav-drawer-cta .btn{width:100%}
  .nav-toggle{display:inline-flex}
  .search-box{display:none}
  .header__actions .btn--sm{display:none}
  .header__inner{height:60px}
  .section{padding:44px 0}
  .block{margin-bottom:44px}
  .page-hero{padding:34px 0 38px}
  .page-hero h1{font-size:32px}
  .hero__lead{font-size:16px}
  .block__head h2,.cta-band h2{font-size:24px}
  .steps{grid-template-columns:minmax(0,1fr)}
  .footer__grid{grid-template-columns:1fr 1fr;gap:26px}
}
@media (max-width:767px){
  .container{padding-left:16px;padding-right:16px}
  .channel-row{grid-template-columns:minmax(0,1fr);gap:14px}
  .channel-row__thumb img{aspect-ratio:16/9}
  .page-hero h1{font-size:28px}
  .page-hero h1 br{display:none}
  .hero__actions .btn{width:100%}
  .cta-band .container{flex-direction:column;align-items:flex-start}
  .cta-band .btn{width:100%}
  .related-grid{grid-template-columns:minmax(0,1fr)}
  .footer__grid{grid-template-columns:minmax(0,1fr);gap:24px;padding-bottom:28px}
  .footer__bottom{flex-direction:column;align-items:flex-start}
  .side-stats{grid-template-columns:repeat(3,1fr)}
}
@media (max-width:420px){
  .logo__text{font-size:15px}
  .logo__mark{width:30px;height:30px;font-size:11px}
  .page-hero h1{font-size:25px}
  .btn{height:44px;padding:0 18px;font-size:14px}
  .btn--sm{height:38px;font-size:13px}
  .block__head h2{font-size:21px}
  .channel-row__body h3{font-size:17px}
}

/* roulang page: category4 */
:root{
  --brand:#175CD3;
  --brand-strong:#0F3F96;
  --brand-hover:#3B7BE0;
  --brand-tint:#EAF1FD;
  --accent:#FF7A2F;
  --accent-tint:#FFF1E6;
  --c1:#175CD3;
  --c2:#12B3A0;
  --c3:#7A5AF8;
  --c4:#E8942B;
  --bg:#F6F8FC;
  --surface:#FFFFFF;
  --dark:#0B1730;
  --border:#E3E8F0;
  --divider:#EEF1F6;
  --t1:#0F172A;
  --t2:#475569;
  --t3:#94A3B8;
  --r-sm:8px;
  --r-md:12px;
  --r-lg:16px;
  --r-xl:22px;
  --r-pill:999px;
  --sh1:0 1px 2px rgba(15,23,42,.06);
  --sh2:0 6px 20px -6px rgba(15,23,42,.12);
  --sh3:0 18px 40px -12px rgba(23,92,211,.22);
  --gap:24px;
}

*,*::before,*::after{box-sizing:border-box;}

html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}

body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC",system-ui,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--t1);
  background:var(--bg);
  overflow-x:hidden;
}

h1,h2,h3,h4,h5{margin:0;font-weight:700;line-height:1.25;color:var(--t1);}
h1{font-size:40px;letter-spacing:-.5px;}
h2{font-size:28px;}
h3{font-size:21px;}
h4{font-size:17px;}
p{margin:0 0 1em;color:var(--t2);}
p:last-child{margin-bottom:0;}
a{color:inherit;text-decoration:none;transition:color .18s ease,background-color .18s ease;}
a:hover{color:var(--brand);}
img{max-width:100%;display:block;border:0;}
ul,ol{margin:0;padding:0;list-style:none;}
button{font:inherit;cursor:pointer;border:0;background:none;}
input,textarea{font:inherit;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px;}

.container{
  width:100%;
  max-width:1240px;
  margin:0 auto;
  padding:0 32px;
}

/* 顶部信息条 */
.topbar{
  background:var(--dark);
  color:rgba(255,255,255,.82);
  font-size:13px;
  height:34px;
  display:flex;
  align-items:center;
}
.topbar__inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
}
.topbar__left{display:flex;align-items:center;gap:12px;min-width:0;}
.topbar__tag{
  display:inline-flex;
  align-items:center;
  height:22px;
  padding:0 10px;
  border-radius:var(--r-pill);
  background:rgba(255,122,47,.16);
  color:#FFB98C;
  font-size:12px;
  white-space:nowrap;
}
.topbar__hint{
  color:rgba(255,255,255,.6);
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
}
.topbar__right{display:flex;align-items:center;gap:18px;white-space:nowrap;}
.topbar__right a{color:rgba(255,255,255,.74);font-size:12px;}
.topbar__right a:hover{color:#fff;}
.topbar__cta{
  display:inline-flex;
  align-items:center;
  height:22px;
  padding:0 12px;
  border-radius:var(--r-pill);
  background:var(--accent);
  color:#fff !important;
  font-size:12px;
  font-weight:600;
}
.topbar__cta:hover{background:#F0651A;color:#fff !important;}

/* 主导航 */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(255,255,255,.96);
  border-bottom:1px solid var(--border);
  transition:box-shadow .25s ease,background-color .25s ease,backdrop-filter .25s ease;
}
.site-header.is-scrolled{
  background:rgba(255,255,255,.86);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  box-shadow:var(--sh2);
}
.header__inner{
  display:flex;
  align-items:center;
  gap:20px;
  height:68px;
}
.logo{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.logo__mark{
  width:38px;height:38px;border-radius:11px;
  background:linear-gradient(135deg,var(--brand),var(--brand-hover));
  color:#fff;font-size:14px;font-weight:700;letter-spacing:.5px;
  display:grid;place-items:center;
  box-shadow:var(--sh2);
}
.logo__text{font-size:18px;font-weight:700;color:var(--t1);white-space:nowrap;}
.logo:hover .logo__text{color:var(--brand);}

.main-nav ul{display:flex;align-items:center;gap:2px;}
.main-nav a{
  position:relative;
  display:block;
  padding:10px 14px;
  font-size:15px;
  color:var(--t2);
  border-radius:var(--r-sm);
  white-space:nowrap;
}
.main-nav a::after{
  content:"";
  position:absolute;
  left:14px;right:14px;bottom:4px;
  height:2px;border-radius:2px;
  background:var(--brand);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .2s ease;
}
.main-nav a:hover{color:var(--brand);background:var(--brand-tint);}
.main-nav a:hover::after{transform:scaleX(1);}
.main-nav a.is-active{color:var(--brand);font-weight:600;}
.main-nav a.is-active::after{transform:scaleX(1);}

.header__actions{margin-left:auto;display:flex;align-items:center;gap:12px;}
.search-box{position:relative;display:flex;align-items:center;}
.search-box i{
  position:absolute;left:13px;top:50%;transform:translateY(-50%);
  font-size:13px;color:var(--t3);pointer-events:none;
}
.search-box input{
  height:40px;width:196px;
  border:1px solid var(--border);
  background:#F7F9FD;
  border-radius:var(--r-pill);
  padding:0 16px 0 34px;
  font-size:14px;color:var(--t1);
  transition:border-color .18s ease,background-color .18s ease,box-shadow .18s ease;
}
.search-box input::placeholder{color:var(--t3);}
.search-box input:focus{
  outline:none;
  border-color:var(--brand);
  background:#fff;
  box-shadow:0 0 0 3px var(--brand-tint);
}
.nav-toggle{
  display:none;
  width:40px;height:40px;
  border-radius:var(--r-md);
  border:1px solid var(--border);
  background:#fff;
  color:var(--t1);
  font-size:16px;
}

/* 按钮 */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:48px;
  padding:0 24px;
  border-radius:var(--r-md);
  font-size:15px;
  font-weight:600;
  border:1px solid transparent;
  transition:background-color .18s ease,color .18s ease,transform .18s ease,box-shadow .18s ease,border-color .18s ease;
  white-space:nowrap;
}
.btn--primary{background:var(--brand);color:#fff;box-shadow:var(--sh1);}
.btn--primary:hover{background:var(--brand-hover);color:#fff;transform:translateY(-1px);box-shadow:var(--sh2);}
.btn--primary:active{transform:translateY(0);box-shadow:var(--sh1);}
.btn--outline{background:transparent;border-color:var(--border);color:var(--brand);}
.btn--outline:hover{background:var(--brand-tint);border-color:var(--brand);color:var(--brand);}
.btn--accent{background:var(--accent);color:#fff;}
.btn--accent:hover{background:#F0651A;color:#fff;transform:translateY(-1px);box-shadow:var(--sh2);}
.btn--ghost{background:transparent;border-color:rgba(255,255,255,.5);color:#fff;}
.btn--ghost:hover{background:rgba(255,255,255,.14);color:#fff;border-color:#fff;}
.btn--sm{height:38px;padding:0 16px;font-size:14px;border-radius:var(--r-sm);}
.btn--lg{height:52px;padding:0 30px;font-size:16px;}

/* 内页 Banner */
.page-hero{
  position:relative;
  background-image:url("/assets/images/backpic/back-2.webp");
  background-size:cover;
  background-position:center 30%;
  overflow:hidden;
}
.page-hero::before{
  content:"";
  position:absolute;inset:0;
  background:linear-gradient(105deg,rgba(11,23,48,.88) 0%,rgba(15,63,150,.7) 58%,rgba(23,92,211,.58) 100%);
}
.page-hero__inner{position:relative;padding:64px 0 72px;max-width:820px;}
.breadcrumbs{margin-bottom:22px;}
.breadcrumbs ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:rgba(255,255,255,.68);}
.breadcrumbs li{display:flex;align-items:center;gap:8px;}
.breadcrumbs li+li::before{content:"/";color:rgba(255,255,255,.4);}
.breadcrumbs a{color:rgba(255,255,255,.74);}
.breadcrumbs a:hover{color:#fff;}
.breadcrumbs [aria-current="page"]{color:#fff;font-weight:600;}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;
  height:30px;padding:0 14px;border-radius:var(--r-pill);
  background:rgba(255,255,255,.14);
  border:1px solid rgba(255,255,255,.22);
  color:#fff;font-size:12px;letter-spacing:.4px;
  margin-bottom:18px;
}
.page-hero h1{color:#fff;font-size:40px;margin-bottom:16px;}
.page-hero__lead{
  color:rgba(255,255,255,.84);
  font-size:17px;
  line-height:1.85;
  max-width:660px;
  margin-bottom:28px;
}
.hero-meta{display:flex;flex-wrap:wrap;gap:10px;}
.hero-meta span{
  display:inline-flex;align-items:center;gap:6px;
  height:32px;padding:0 14px;border-radius:var(--r-pill);
  background:rgba(255,255,255,.1);
  border:1px solid rgba(255,255,255,.16);
  color:rgba(255,255,255,.9);font-size:13px;
}

/* 板块 */
.section{padding:80px 0;}
.section--tight{padding:56px 0;}
.section--alt{background:var(--surface);border-top:1px solid var(--divider);border-bottom:1px solid var(--divider);}
.section__head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:24px;
  margin-bottom:36px;
}
.section__head--center{flex-direction:column;align-items:center;text-align:center;}
.section__eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;color:var(--brand);
  letter-spacing:1px;margin-bottom:10px;
}
.section__eyebrow::before{content:"";width:18px;height:2px;border-radius:2px;background:var(--accent);}
.section__title{font-size:28px;margin-bottom:10px;}
.section__desc{color:var(--t2);font-size:15px;max-width:640px;margin:0;}

/* 要点卡 */
.point-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:20px;
}
.point-card{
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:var(--r-lg);
  padding:24px;
  box-shadow:var(--sh1);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.point-card:hover{transform:translateY(-4px);box-shadow:var(--sh2);border-color:#D5E0F5;}
.point-card__icon{
  width:44px;height:44px;border-radius:var(--r-md);
  display:grid;place-items:center;
  font-size:18px;margin-bottom:16px;
  background:var(--brand-tint);color:var(--brand);
}
.point-card:nth-child(2) .point-card__icon{background:#E4F7F4;color:var(--c2);}
.point-card:nth-child(3) .point-card__icon{background:#F0EBFE;color:var(--c3);}
.point-card:nth-child(4) .point-card__icon{background:var(--accent-tint);color:var(--c4);}
.point-card h3{font-size:17px;margin-bottom:8px;}
.point-card p{font-size:14px;line-height:1.75;color:var(--t2);margin:0;}

/* 徽章 */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  height:24px;padding:0 10px;border-radius:var(--r-pill);
  font-size:12px;font-weight:600;
  background:var(--brand-tint);color:var(--brand);
  white-space:nowrap;
}
.badge--c2{background:#E4F7F4;color:#0E8C7D;}
.badge--c3{background:#F0EBFE;color:#6A47E8;}
.badge--c4{background:var(--accent-tint);color:#C96B12;}
.badge--muted{background:#F1F4FA;color:var(--t2);}

/* 时间轴 / 图集流 */
.timeline{position:relative;padding:8px 0;}
.timeline::before{
  content:"";
  position:absolute;
  top:0;bottom:0;left:50%;
  width:2px;
  background:linear-gradient(180deg,var(--brand-tint),#D8E4F8 12%,#D8E4F8 88%,var(--brand-tint));
  transform:translateX(-1px);
}
.tl-item{
  position:relative;
  display:grid;
  grid-template-columns:1fr 64px 1fr;
  column-gap:24px;
  align-items:center;
  margin-bottom:40px;
}
.tl-item:last-child{margin-bottom:0;}
.tl-item::after{
  content:"";
  position:absolute;
  left:50%;top:50%;
  width:14px;height:14px;border-radius:50%;
  background:#fff;
  border:3px solid var(--brand);
  transform:translate(-50%,-50%);
  box-shadow:0 0 0 6px rgba(23,92,211,.09);
  z-index:2;
}
.tl-item__media{grid-column:1;}
.tl-item__body{grid-column:3;}
.tl-item:nth-child(even) .tl-item__media{grid-column:3;}
.tl-item:nth-child(even) .tl-item__body{grid-column:1;}
.tl-item__media{
  position:relative;
  border-radius:var(--r-lg);
  overflow:hidden;
  box-shadow:var(--sh2);
  background:#DEE7F6;
}
.tl-item__media img{
  width:100%;height:216px;object-fit:cover;
  transition:transform .4s ease;
}
.tl-item__media:hover img{transform:scale(1.03);}
.tl-item__media::after{
  content:"";
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(11,23,48,0) 46%,rgba(11,23,48,.42));
  pointer-events:none;
}
.tl-item__body{
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:var(--r-lg);
  padding:22px 24px;
  box-shadow:var(--sh1);
  transition:box-shadow .2s ease,border-color .2s ease;
}
.tl-item__body:hover{box-shadow:var(--sh2);border-color:#D5E0F5;}
.tl-item__body h3{font-size:18px;margin:12px 0 10px;}
.tl-item__body p{font-size:14.5px;color:var(--t2);margin:0;}
.tl-item__meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;color:var(--t3);
}

/* 场景快捷入口 */
.scene-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.scene-card{
  display:flex;
  flex-direction:column;
  gap:12px;
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:var(--r-lg);
  padding:24px;
  box-shadow:var(--sh1);
  transition:transform .2s ease,box-shadow .2s ease;
}
.scene-card:hover{transform:translateY(-4px);box-shadow:var(--sh2);color:inherit;}
.scene-card__top{display:flex;align-items:center;justify-content:space-between;gap:12px;}
.scene-card h3{font-size:17px;}
.scene-card p{font-size:14px;color:var(--t2);margin:0;}
.scene-card__link{
  display:inline-flex;align-items:center;gap:6px;
  font-size:14px;font-weight:600;color:var(--brand);
  margin-top:auto;
}
.scene-card:hover .scene-card__link{color:var(--brand-hover);}

/* 步骤流程 */
.flow{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:20px;
  counter-reset:step;
}
.flow-step{
  position:relative;
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:var(--r-lg);
  padding:26px 22px;
  box-shadow:var(--sh1);
}
.flow-step__num{
  display:inline-flex;align-items:center;justify-content:center;
  width:34px;height:34px;border-radius:var(--r-sm);
  background:var(--brand);color:#fff;
  font-size:14px;font-weight:700;
  margin-bottom:16px;
}
.flow-step:nth-child(2) .flow-step__num{background:var(--c2);}
.flow-step:nth-child(3) .flow-step__num{background:var(--c3);}
.flow-step:nth-child(4) .flow-step__num{background:var(--c4);}
.flow-step h3{font-size:16px;margin-bottom:8px;}
.flow-step p{font-size:14px;color:var(--t2);margin:0;}

/* FAQ */
.faq{max-width:900px;margin:0 auto;}
.faq-item{
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:var(--r-md);
  margin-bottom:12px;
  overflow:hidden;
  transition:box-shadow .2s ease,border-color .2s ease;
}
.faq-item:hover{border-color:#D5E0F5;box-shadow:var(--sh1);}
.faq-q{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  min-height:56px;
  padding:16px 22px;
  text-align:left;
  font-size:16px;
  font-weight:600;
  color:var(--t1);
}
.faq-q:hover{color:var(--brand);}
.faq-q i{
  flex:0 0 auto;
  font-size:14px;color:var(--brand);
  transition:transform .2s ease;
}
.faq-item.is-open{border-color:#CFDDF6;box-shadow:var(--sh2);}
.faq-item.is-open .faq-q{color:var(--brand);}
.faq-item.is-open .faq-q i{transform:rotate(180deg);}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .25s ease;
}
.faq-item.is-open .faq-a{max-height:420px;}
.faq-a__inner{
  padding:0 22px 20px;
  font-size:15px;
  color:var(--t2);
  line-height:1.8;
  border-top:1px solid var(--divider);
  padding-top:16px;
  margin:0 22px 20px;
  padding-left:0;padding-right:0;
}

/* 相关分类横滑 */
.track-wrap{position:relative;}
.track{
  display:flex;
  gap:18px;
  overflow-x:auto;
  scrollbar-width:none;
  -ms-overflow-style:none;
  padding:4px 4px 12px;
  scroll-snap-type:x proximity;
}
.track::-webkit-scrollbar{display:none;}
.rel-card{
  flex:0 0 250px;
  scroll-snap-align:start;
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:var(--r-lg);
  overflow:hidden;
  box-shadow:var(--sh1);
  transition:transform .2s ease,box-shadow .2s ease;
  display:flex;
  flex-direction:column;
}
.rel-card:hover{transform:translateY(-4px);box-shadow:var(--sh2);color:inherit;}
.rel-card img{width:100%;height:132px;object-fit:cover;}
.rel-card__body{padding:16px 18px 18px;display:flex;flex-direction:column;gap:8px;flex:1;}
.rel-card__body h3{font-size:16px;}
.rel-card__body p{font-size:13.5px;color:var(--t2);margin:0;}
.rel-card__more{
  margin-top:auto;
  display:inline-flex;align-items:center;gap:6px;
  font-size:13px;font-weight:600;color:var(--brand);
}
.rel-card.is-current{border-color:var(--brand);box-shadow:var(--sh3);}

/* CTA 带 */
.cta-band{
  position:relative;
  background-image:url("/assets/images/backpic/back-3.png");
  background-size:cover;
  background-position:center;
  overflow:hidden;
}
.cta-band::before{
  content:"";
  position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(11,23,48,.94) 0%,rgba(15,63,150,.86) 52%,rgba(11,23,48,.9) 100%);
}
.cta-band__inner{
  position:relative;
  padding:64px 0;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:32px;
}
.cta-band h2{color:#fff;font-size:28px;margin-bottom:12px;}
.cta-band p{color:rgba(255,255,255,.78);font-size:15px;max-width:560px;margin:0;}
.cta-band__actions{display:flex;gap:12px;flex-wrap:wrap;}

/* 页脚 */
.site-footer{background:var(--dark);color:rgba(255,255,255,.72);padding:64px 0 0;}
.footer__grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1fr;
  gap:40px;
  padding-bottom:44px;
}
.footer__brand{
  display:flex;align-items:center;gap:10px;
  color:#fff;font-size:17px;font-weight:700;margin-bottom:16px;
}
.footer__brand .logo__mark{width:34px;height:34px;border-radius:10px;}
.footer__desc{font-size:13.5px;line-height:1.85;color:rgba(255,255,255,.6);max-width:320px;margin:0;}
.footer__title{font-size:14px;font-weight:600;color:#fff;margin-bottom:16px;}
.footer__list li{margin-bottom:10px;}
.footer__list a{font-size:13px;color:rgba(255,255,255,.66);display:inline-block;transition:transform .18s ease,color .18s ease;}
.footer__list a:hover{color:#fff;transform:translateX(2px);}
.footer__bottom{
  border-top:1px solid rgba(255,255,255,.1);
  padding:20px 0;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  font-size:12.5px;
  color:rgba(255,255,255,.5);
}

.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;}

/* 响应式 */
@media (max-width:1199px){
  .point-grid{grid-template-columns:repeat(2,1fr);}
  .flow{grid-template-columns:repeat(2,1fr);}
  .scene-grid{grid-template-columns:repeat(2,1fr);}
  .footer__grid{grid-template-columns:1.2fr 1fr 1fr;gap:32px;}
}

@media (max-width:991px){
  .container{padding:0 24px;}
  .section{padding:56px 0;}
  .topbar{height:30px;font-size:12px;}
  .topbar__right{display:none;}
  .header__inner{height:56px;gap:12px;}
  .logo__text{font-size:16px;}
  .logo__mark{width:34px;height:34px;}
  .search-box{display:none;}
  .nav-toggle{display:inline-flex;align-items:center;justify-content:center;}
  .main-nav{
    display:none;
    position:absolute;
    top:100%;left:0;right:0;
    background:#fff;
    border-bottom:1px solid var(--border);
    box-shadow:var(--sh2);
    padding:14px 24px 20px;
  }
  .main-nav.is-open{display:block;}
  .main-nav ul{
    display:grid;
    grid-template-columns:repeat(2,1fr);
    gap:10px;
  }
  .main-nav a{
    padding:12px 14px;
    background:#F7F9FD;
    border:1px solid var(--border);
    border-radius:var(--r-md);
    font-size:14px;
  }
  .main-nav a::after{display:none;}
  .main-nav a.is-active{background:var(--brand-tint);border-color:#CFDDF6;}
  .page-hero__inner{padding:48px 0 56px;}
  .page-hero h1{font-size:32px;}
  .page-hero__lead{font-size:15.5px;}
  .section__head{flex-direction:column;align-items:flex-start;gap:16px;}
  .timeline::before{left:16px;}
  .tl-item{grid-template-columns:1fr;padding-left:44px;margin-bottom:28px;row-gap:14px;}
  .tl-item::after{left:16px;top:26px;transform:translate(-50%,0);}
  .tl-item__media{grid-column:1 !important;}
  .tl-item__body{grid-column:1 !important;}
  .tl-item__media img{height:190px;}
  .cta-band__inner{flex-direction:column;align-items:flex-start;padding:52px 0;}
  .footer__grid{grid-template-columns:1fr 1fr;gap:32px;}
}

@media (max-width:767px){
  .container{padding:0 16px;}
  .section{padding:44px 0;}
  h1{font-size:28px;}
  .page-hero h1{font-size:26px;}
  .section__title{font-size:22px;}
  .point-grid{grid-template-columns:1fr;gap:16px;}
  .scene-grid{grid-template-columns:1fr;}
  .flow{grid-template-columns:1fr;}
  .tl-item{padding-left:36px;}
  .tl-item::after{left:12px;}
  .timeline::before{left:12px;}
  .tl-item__body{padding:18px;}
  .tl-item__media img{height:170px;}
  .rel-card{flex:0 0 220px;}
  .faq-q{font-size:15px;padding:14px 16px;}
  .faq-a__inner{margin:0 16px 18px;font-size:14.5px;}
  .cta-band__actions{width:100%;}
  .cta-band__actions .btn{width:100%;}
  .footer__grid{grid-template-columns:1fr;gap:28px;}
  .footer__bottom{flex-direction:column;align-items:flex-start;}
}

@media (max-width:420px){
  body{font-size:15px;}
  .page-hero h1{font-size:23px;}
  .section__title{font-size:20px;}
  .btn{height:44px;padding:0 18px;font-size:14px;}
  .btn--lg{height:46px;}
  .hero-meta span{font-size:12px;height:28px;padding:0 11px;}
}