/* roulang page: index */
:root{
  --c-bg:#F5F7FB;
  --c-surface:#FFFFFF;
  --c-surface-2:#EEF3FB;
  --c-primary:#1B4FD8;
  --c-primary-dark:#12389E;
  --c-primary-soft:#E3ECFF;
  --c-accent:#FF6B2C;
  --c-accent-soft:#FFEDE4;
  --c-ink:#0E1B2E;
  --c-ink-2:#46566E;
  --c-ink-3:#8494AB;
  --c-line:#E2E8F2;
  --c-success:#17A673;
  --c-warn:#F0A32A;
  --r-card:16px;
  --r-sm:10px;
  --r-hero:20px;
  --r-cover:12px;
  --sh-1:0 1px 2px rgba(14,27,46,.04), 0 4px 12px rgba(14,27,46,.05);
  --sh-2:0 8px 24px rgba(27,79,216,.10);
  --sh-hover:0 14px 32px rgba(14,27,46,.12);
  --container:1240px;
  --font:system-ui,-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",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:1.9;
  color:var(--c-ink);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0;}
ul,ol{padding:0;list-style:none;}
img{display:block;max-width:100%;height:auto;}
a{color:var(--c-primary);text-decoration:none;transition:color .2s ease;}
a:hover{color:var(--c-primary-dark);}
button{font-family:inherit;font-size:inherit;border:0;background:none;cursor:pointer;}
input{font-family:inherit;}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;border-radius:4px;}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px;}
.section{padding:96px 0;}
.section--tight{padding:72px 0;}
.section--soft{background:var(--c-surface-2);}
.section--plain{background:var(--c-surface);}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:32px;flex-wrap:wrap;}
.section-head h2{font-size:clamp(22px,2.4vw,30px);font-weight:700;line-height:1.3;letter-spacing:-.3px;}
.section-head .sub{color:var(--c-ink-2);font-size:15px;margin-top:8px;max-width:640px;}
.text-link{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--c-primary);border-bottom:1px solid transparent;transition:border-color .2s ease,color .2s ease;}
.text-link:hover{border-color:var(--c-primary);color:var(--c-primary-dark);}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;letter-spacing:.04em;color:var(--c-primary);background:var(--c-primary-soft);padding:6px 14px;border-radius:999px;}

/* 按钮 */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:46px;padding:0 24px;border-radius:var(--r-sm);
  font-size:15px;font-weight:600;cursor:pointer;transition:all .2s ease;white-space:nowrap;}
.btn--primary{background:var(--c-primary);color:#fff;box-shadow:var(--sh-2);}
.btn--primary:hover{background:var(--c-primary-dark);color:#fff;transform:translateY(-2px);box-shadow:0 12px 26px rgba(27,79,216,.22);}
.btn--primary:active{transform:translateY(1px);}
.btn--ghost{background:#fff;color:var(--c-ink);border:1px solid var(--c-line);}
.btn--ghost:hover{border-color:var(--c-primary);color:var(--c-primary);transform:translateY(-2px);}
.btn--ghost:active{transform:translateY(1px);}
.btn--light{background:rgba(255,255,255,.94);color:var(--c-ink);border:1px solid rgba(255,255,255,.6);}
.btn--light:hover{background:#fff;color:var(--c-primary);transform:translateY(-2px);}
.btn:disabled{opacity:.45;cursor:not-allowed;transform:none;box-shadow:none;}

/* 徽章 */
.badge{display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:999px;font-size:12px;font-weight:600;line-height:1;}
.badge--soft{background:var(--c-primary-soft);color:var(--c-primary);}
.badge--accent{background:var(--c-accent-soft);color:var(--c-accent);}
.badge--live{background:var(--c-accent);color:#fff;}

/* 头部导航 */
.site-header{position:sticky;top:0;z-index:80;background:#fff;border-bottom:1px solid var(--c-line);transition:box-shadow .25s ease;}
.site-header.is-scrolled{box-shadow:var(--sh-1);}
.header-inner{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;height:72px;gap:16px;}
.brand{display:inline-flex;align-items:center;gap:10px;justify-self:center;color:var(--c-ink);}
.brand:hover{color:var(--c-ink);}
.brand-mark{width:34px;height:34px;border-radius:10px;background:linear-gradient(135deg,var(--c-primary),var(--c-primary-dark));
  color:#fff;font-size:17px;font-weight:700;display:flex;align-items:center;justify-content:center;flex:0 0 auto;}
.brand-text{font-size:18px;font-weight:700;letter-spacing:-.2px;white-space:nowrap;}
.nav{display:flex;align-items:center;gap:4px;}
.nav--left{justify-self:start;}
.nav--right{justify-self:end;}
.nav-link{position:relative;display:inline-flex;align-items:center;height:72px;padding:0 14px;font-size:15px;font-weight:500;color:var(--c-ink-2);}
.nav-link::after{content:"";position:absolute;left:14px;right:14px;bottom:16px;height:2px;background:var(--c-primary);transform:scaleX(0);transform-origin:center;transition:transform .22s ease;}
.nav-link:hover{color:var(--c-primary);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.is-active{color:var(--c-primary);font-weight:600;}
.nav-link.is-active::after{transform:scaleX(1);}
.nav-toggle{display:none;position:absolute;right:16px;top:50%;transform:translateY(-50%);width:42px;height:42px;border-radius:10px;border:1px solid var(--c-line);}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--c-ink);margin:4px auto;border-radius:2px;transition:transform .2s ease,opacity .2s ease;}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0;}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6px) rotate(-45deg);}
.header-inner{position:relative;}
.mobile-drawer{display:none;border-top:1px solid var(--c-line);background:#fff;}
.mobile-drawer.is-open{display:block;}
.mobile-drawer a{display:flex;align-items:center;height:52px;padding:0 24px;font-size:15px;color:var(--c-ink-2);border-bottom:1px solid var(--c-line);}
.mobile-drawer a.is-active{color:var(--c-primary);font-weight:600;background:var(--c-primary-soft);}
.drawer-mask{display:none;position:fixed;inset:0;background:rgba(14,27,46,.45);z-index:70;}
.drawer-mask.is-open{display:block;}

/* Hero */
.hero{position:relative;min-height:560px;display:flex;align-items:center;color:#fff;
  background-image:linear-gradient(90deg,rgba(14,27,46,.90) 0%,rgba(14,27,46,.72) 46%,rgba(14,27,46,.32) 100%),url('/assets/images/backpic/back-1.webp');
  background-size:cover;background-position:center;}
.hero::after{content:"";position:absolute;left:0;right:0;bottom:0;height:120px;background:linear-gradient(180deg,rgba(14,27,46,0),rgba(14,27,46,.45));pointer-events:none;}
.hero-inner{position:relative;z-index:2;max-width:760px;padding:88px 0;}
.hero h1{font-size:clamp(30px,4.2vw,52px);font-weight:700;line-height:1.15;letter-spacing:-.5px;color:#fff;}
.hero-sub{margin-top:20px;font-size:17px;line-height:1.85;color:rgba(255,255,255,.86);max-width:640px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px;}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:36px;}
.hero-tags span{display:inline-flex;align-items:center;gap:6px;font-size:13px;font-weight:500;color:rgba(255,255,255,.92);
  background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.22);padding:7px 14px;border-radius:999px;}

/* 数据条 */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:-52px;position:relative;z-index:5;}
.stat-card{background:#fff;border-radius:var(--r-card);padding:22px 22px 20px;box-shadow:var(--sh-1);border:1px solid var(--c-line);}
.stat-card .num{font-size:28px;font-weight:700;color:var(--c-primary);font-variant-numeric:tabular-nums;letter-spacing:-.5px;}
.stat-card .lbl{margin-top:6px;font-size:14px;color:var(--c-ink-2);}
.stat-card .hint{margin-top:4px;font-size:12px;color:var(--c-ink-3);}

/* 横滑片库 */
.rail-wrap{position:relative;}
.rail-wrap::before,.rail-wrap::after{content:"";position:absolute;top:0;bottom:24px;width:56px;pointer-events:none;z-index:3;}
.rail-wrap::before{left:-24px;background:linear-gradient(90deg,var(--c-bg),rgba(245,247,251,0));}
.rail-wrap::after{right:-24px;background:linear-gradient(270deg,var(--c-bg),rgba(245,247,251,0));}
.rail{display:flex;gap:20px;overflow-x:auto;scroll-snap-type:x mandatory;padding:6px 4px 22px;scrollbar-width:none;}
.rail::-webkit-scrollbar{display:none;}
.rail-card{flex:0 0 232px;scroll-snap-align:start;background:#fff;border-radius:var(--r-card);border:1px solid var(--c-line);
  box-shadow:var(--sh-1);overflow:hidden;transition:transform .2s ease,box-shadow .2s ease;}
.rail-card:hover{transform:translateY(-4px);box-shadow:var(--sh-hover);}
.rail-card .cover{position:relative;aspect-ratio:2/3;overflow:hidden;background:var(--c-surface-2);}
.rail-card .cover img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease;}
.rail-card:hover .cover img{transform:scale(1.03);}
.rail-card .cover .badge{position:absolute;top:12px;left:12px;}
.rail-card .body{padding:14px 16px 18px;}
.rail-card h3{font-size:16px;font-weight:600;line-height:1.45;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.rail-card .meta{margin-top:8px;font-size:13px;color:var(--c-ink-3);font-variant-numeric:tabular-nums;}
.rail-nav{display:flex;gap:8px;}
.rail-btn{width:40px;height:40px;border-radius:50%;border:1px solid var(--c-line);background:#fff;color:var(--c-ink-2);
  display:flex;align-items:center;justify-content:center;font-size:16px;transition:all .2s ease;}
.rail-btn:hover{border-color:var(--c-primary);color:var(--c-primary);background:var(--c-primary-soft);}
.rail-btn:active{transform:translateY(1px);}

/* 热播推荐 */
.rank-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;}
.rank-card{position:relative;background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);overflow:hidden;
  box-shadow:var(--sh-1);transition:transform .2s ease,box-shadow .2s ease;}
.rank-card:hover{transform:translateY(-4px);box-shadow:var(--sh-hover);}
.rank-card--feature{grid-column:span 2;grid-row:span 2;display:flex;flex-direction:column;}
.rank-card .cover{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--c-surface-2);}
.rank-card--feature .cover{aspect-ratio:16/9;}
.rank-card .cover img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease;}
.rank-card:hover .cover img{transform:scale(1.03);}
.rank-card .body{padding:16px 18px 20px;}
.rank-card h3{font-size:17px;font-weight:600;line-height:1.45;}
.rank-card--feature h3{font-size:21px;}
.rank-card p{margin-top:8px;font-size:14px;color:var(--c-ink-2);line-height:1.8;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.rank-no{position:absolute;top:12px;left:12px;width:34px;height:34px;border-radius:10px;background:rgba(255,255,255,.94);
  border:2px solid var(--c-primary);color:var(--c-primary);font-size:15px;font-weight:700;display:flex;align-items:center;justify-content:center;z-index:2;font-variant-numeric:tabular-nums;}
.rank-no--first{background:var(--c-accent);border-color:var(--c-accent);color:#fff;}
.rank-card .meta{margin-top:12px;display:flex;align-items:center;gap:10px;font-size:13px;color:var(--c-ink-3);font-variant-numeric:tabular-nums;}

/* 资讯列表（CMS） */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.news-card{display:flex;flex-direction:column;background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);
  overflow:hidden;box-shadow:var(--sh-1);transition:transform .2s ease,box-shadow .2s ease;}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--sh-hover);}
.news-card__cover{display:block;aspect-ratio:16/9;overflow:hidden;background:var(--c-surface-2);}
.news-card__cover img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease;}
.news-card:hover .news-card__cover img{transform:scale(1.03);}
.news-card__body{padding:18px 20px 20px;display:flex;flex-direction:column;flex:1;}
.news-card__title{font-size:18px;font-weight:600;line-height:1.45;margin-top:12px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-card__title a{color:var(--c-ink);}
.news-card__title a:hover{color:var(--c-primary);}
.news-card__desc{margin-top:10px;font-size:14px;color:var(--c-ink-2);line-height:1.8;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;}
.news-card__meta{margin-top:auto;padding-top:16px;display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:13px;color:var(--c-ink-3);font-variant-numeric:tabular-nums;}
.empty-state{padding:56px 24px;text-align:center;background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);}
.empty-state .ico{width:56px;height:56px;border-radius:50%;background:var(--c-primary-soft);color:var(--c-primary);
  display:flex;align-items:center;justify-content:center;margin:0 auto 16px;font-size:24px;}
.empty-state p{color:var(--c-ink-2);font-size:15px;margin-bottom:20px;}

/* 片单分区 */
.split{display:grid;grid-template-columns:280px 1fr;gap:40px;align-items:start;}
.split-title h2{font-size:clamp(22px,2.4vw,30px);font-weight:700;line-height:1.3;letter-spacing:-.3px;}
.split-title p{margin-top:14px;font-size:15px;color:var(--c-ink-2);line-height:1.85;}
.split-title .text-link{margin-top:20px;}
.mix-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:20px;}
.mix-card{background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-1);
  transition:transform .2s ease,box-shadow .2s ease;}
.mix-card:hover{transform:translateY(-4px);box-shadow:var(--sh-hover);}
.mix-card .cover{aspect-ratio:16/10;overflow:hidden;background:var(--c-surface-2);}
.mix-card .cover img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease;}
.mix-card:hover .cover img{transform:scale(1.03);}
.mix-card .body{padding:16px 18px 20px;}
.mix-card h3{font-size:17px;font-weight:600;line-height:1.45;}
.mix-card p{margin-top:8px;font-size:14px;color:var(--c-ink-2);line-height:1.8;}
.mix-card--wide{grid-row:span 2;}
.mix-card--wide .cover{aspect-ratio:16/11;}
.mix-card--wide h3{font-size:20px;}

/* 流程进度列表 */
.flow{display:grid;gap:16px;}
.flow-item{background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);padding:20px 24px;box-shadow:var(--sh-1);
  display:grid;grid-template-columns:44px 1fr;gap:18px;align-items:start;transition:transform .2s ease,box-shadow .2s ease;}
.flow-item:hover{transform:translateY(-3px);box-shadow:var(--sh-hover);}
.flow-idx{width:44px;height:44px;border-radius:12px;background:var(--c-primary-soft);color:var(--c-primary);
  font-weight:700;font-size:17px;display:flex;align-items:center;justify-content:center;font-variant-numeric:tabular-nums;}
.flow-item h3{font-size:17px;font-weight:600;line-height:1.45;}
.flow-item p{margin-top:6px;font-size:14px;color:var(--c-ink-2);line-height:1.8;}
.bar{margin-top:14px;height:6px;border-radius:999px;background:var(--c-surface-2);overflow:hidden;}
.bar span{display:block;height:100%;border-radius:999px;background:var(--c-primary);}
.bar span.accent{background:var(--c-accent);}
.bar span.success{background:var(--c-success);}

/* CTA */
.cta{background:linear-gradient(45deg,var(--c-primary),var(--c-primary-dark));border-radius:24px;color:#fff;overflow:hidden;
  display:grid;grid-template-columns:1.15fr 1fr;align-items:center;gap:32px;padding:0;}
.cta-body{padding:56px 8px 56px 48px;}
.cta h2{font-size:clamp(22px,2.6vw,32px);font-weight:700;line-height:1.3;color:#fff;}
.cta p{margin-top:16px;font-size:15px;line-height:1.85;color:rgba(255,255,255,.86);max-width:520px;}
.cta-actions{margin-top:28px;display:flex;flex-wrap:wrap;align-items:center;gap:20px;}
.cta .text-link{color:#fff;}
.cta .text-link:hover{color:#fff;border-color:#fff;}
.cta-media{height:100%;min-height:280px;}
.cta-media img{width:100%;height:100%;object-fit:cover;}

/* FAQ */
.faq{display:grid;gap:12px;max-width:880px;}
.faq details{background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);box-shadow:var(--sh-1);
  transition:box-shadow .2s ease,border-color .2s ease;}
.faq details[open]{box-shadow:var(--sh-2);border-color:#cfdcf7;}
.faq summary{position:relative;list-style:none;cursor:pointer;padding:20px 56px 20px 26px;font-size:16px;font-weight:600;line-height:1.6;}
.faq summary::-webkit-details-marker{display:none;}
.faq summary::before{content:"";position:absolute;left:0;top:14px;bottom:14px;width:3px;border-radius:0 3px 3px 0;background:transparent;transition:background .2s ease;}
.faq details[open] summary::before{background:var(--c-primary);}
.faq summary::after{content:"+";position:absolute;right:24px;top:50%;transform:translateY(-50%);font-size:20px;color:var(--c-ink-3);
  transition:transform .25s ease,color .25s ease;}
.faq details[open] summary::after{transform:translateY(-50%) rotate(45deg);color:var(--c-primary);}
.faq .answer{padding:0 56px 22px 26px;font-size:15px;line-height:1.85;color:var(--c-ink-2);}

/* 页脚 */
.site-footer{background:#0E1B2E;color:rgba(255,255,255,.72);margin-top:0;}
.footer-top{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;padding:72px 0 48px;}
.footer-brand{display:inline-flex;align-items:center;gap:10px;color:#fff;font-size:18px;font-weight:700;}
.footer-brand:hover{color:#fff;}
.footer-brand .brand-mark{background:rgba(255,255,255,.12);}
.footer-about{margin-top:16px;font-size:14px;line-height:1.85;color:rgba(255,255,255,.62);max-width:320px;}
.footer-col h3{font-size:15px;font-weight:600;color:#fff;margin-bottom:16px;}
.footer-col ul{display:grid;gap:10px;}
.footer-col a{font-size:14px;color:rgba(255,255,255,.68);}
.footer-col a:hover{color:#fff;}
.footer-col p{font-size:14px;line-height:1.85;color:rgba(255,255,255,.62);}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);padding:22px 0;display:flex;flex-wrap:wrap;gap:12px;
  align-items:center;justify-content:space-between;font-size:13px;color:rgba(255,255,255,.5);}
.footer-bottom a{color:rgba(255,255,255,.6);}
.footer-bottom a:hover{color:#fff;}

/* 响应式 */
@media (max-width:1279px){
  .rail-card{flex:0 0 216px;}
}
@media (max-width:1023px){
  .section{padding:72px 0;}
  .nav{display:none;}
  .nav-toggle{display:block;}
  .header-inner{grid-template-columns:1fr;height:60px;}
  .brand{justify-self:center;}
  .hero{min-height:460px;}
  .hero-inner{padding:64px 0;}
  .stats{grid-template-columns:repeat(2,1fr);margin-top:0;padding-top:32px;}
  .rank-grid{grid-template-columns:repeat(3,1fr);}
  .rank-card--feature{grid-column:span 3;grid-row:auto;}
  .news-grid{grid-template-columns:repeat(2,1fr);}
  .split{grid-template-columns:1fr;gap:24px;}
  .mix-grid{grid-template-columns:1fr 1fr;}
  .mix-card--wide{grid-column:span 2;grid-row:auto;}
  .cta{grid-template-columns:1fr;padding:0;}
  .cta-body{padding:44px 32px;}
  .cta-media{min-height:220px;order:-1;}
  .footer-top{grid-template-columns:1fr 1fr;gap:32px;padding:56px 0 40px;}
}
@media (max-width:767px){
  .container{padding:0 16px;}
  .section{padding:56px 0;}
  .hero{min-height:420px;background-image:linear-gradient(180deg,rgba(14,27,46,.55) 0%,rgba(14,27,46,.88) 100%),url('/assets/images/backpic/back-1.webp');}
  .hero h1{font-size:clamp(24px,7vw,32px);}
  .hero-sub{font-size:15px;}
  .hero-actions .btn{width:100%;}
  .stats{grid-template-columns:1fr 1fr;gap:14px;}
  .stat-card{padding:18px;}
  .stat-card .num{font-size:22px;}
  .rank-grid{grid-template-columns:repeat(2,1fr);gap:14px;}
  .rank-card--feature{grid-column:span 2;}
  .news-grid{grid-template-columns:1fr;gap:16px;}
  .mix-grid{grid-template-columns:1fr;gap:16px;}
  .mix-card--wide{grid-column:span 1;}
  .rail-card{flex:0 0 160px;}
  .rail-card .body{padding:12px;}
  .rail-card h3{font-size:14px;}
  .cta{border-radius:18px;}
  .cta-body{padding:32px 22px;}
  .faq summary{padding:16px 48px 16px 20px;font-size:15px;}
  .faq .answer{padding:0 48px 18px 20px;}
  .footer-top{grid-template-columns:1fr;gap:28px;padding:44px 0 32px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .rail-wrap::before,.rail-wrap::after{display:none;}
}

/* roulang page: category1 */
:root{
  --c-bg:#F5F7FB;
  --c-surface:#FFFFFF;
  --c-surface-2:#EEF3FB;
  --c-primary:#1B4FD8;
  --c-primary-dark:#12389E;
  --c-primary-soft:#E3ECFF;
  --c-accent:#FF6B2C;
  --c-accent-soft:#FFEDE4;
  --c-ink:#0E1B2E;
  --c-ink-2:#46566E;
  --c-ink-3:#8494AB;
  --c-line:#E2E8F2;
  --c-ok:#17A673;
  --c-warn:#F0A32A;
  --sh-1:0 1px 2px rgba(14,27,46,.04),0 4px 12px rgba(14,27,46,.05);
  --sh-2:0 8px 24px rgba(27,79,216,.10);
  --sh-hover:0 14px 32px rgba(14,27,46,.12);
  --r-card:16px;
  --r-sm:10px;
  --r-hero:20px;
  --r-cover:12px;
  --r-pill:999px;
  --container:1240px;
  --gutter:24px;
  --sp-block:96px;
  --font:system-ui,-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",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:1.9;
  color:var(--c-ink);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0;}
a{color:var(--c-primary);text-decoration:none;transition:color .2s ease,opacity .2s ease;}
a:hover{color:var(--c-primary-dark);}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;padding:0;}
ul,ol{list-style:none;}
button{font-family:inherit;font-size:inherit;cursor:pointer;border:0;background:none;color:inherit;}
input{font-family:inherit;}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;border-radius:4px;}
::selection{background:var(--c-primary-soft);color:var(--c-primary-dark);}

.container{max-width:var(--container);margin:0 auto;padding:0 var(--gutter);}
.section{padding:var(--sp-block) 0;}
.section--tight{padding:64px 0;}
.section--soft{background:var(--c-surface-2);}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:36px;flex-wrap:wrap;}
.section-head h2{font-size:clamp(22px,2.4vw,30px);line-height:1.3;font-weight:700;letter-spacing:-.2px;}
.section-head p{margin-top:10px;color:var(--c-ink-2);font-size:15px;max-width:640px;}
.link-more{font-size:14px;font-weight:600;display:inline-flex;align-items:center;gap:6px;white-space:nowrap;}
.link-more::after{content:"→";transition:transform .2s ease;}
.link-more:hover::after{transform:translateX(4px);}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;color:var(--c-primary);
  background:var(--c-primary-soft);border-radius:var(--r-pill);
  padding:6px 14px;letter-spacing:.02em;
}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:#fff;border-bottom:1px solid var(--c-line);
  transition:box-shadow .25s ease;
}
.site-header.is-scrolled{box-shadow:var(--sh-1);}
.header-inner{
  height:72px;display:flex;align-items:center;justify-content:space-between;gap:18px;
}
.brand{display:flex;align-items:center;gap:10px;color:var(--c-ink);font-weight:700;font-size:17px;letter-spacing:-.2px;}
.brand:hover{color:var(--c-primary);}
.brand-mark{
  width:34px;height:34px;border-radius:10px;flex:0 0 auto;
  background:linear-gradient(45deg,var(--c-primary),var(--c-primary-dark));
  color:#fff;display:flex;align-items:center;justify-content:center;font-size:16px;font-weight:700;
}
.nav{display:flex;align-items:center;gap:6px;}
.nav-link{
  position:relative;display:inline-block;
  padding:8px 12px;border-radius:var(--r-sm);
  font-size:14.5px;font-weight:600;color:var(--c-ink-2);
  transition:color .2s ease,background .2s ease;
}
.nav-link::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;border-radius:2px;
  background:var(--c-primary);transform:scaleX(0);transform-origin:left;transition:transform .22s ease;
}
.nav-link:hover{color:var(--c-primary);background:var(--c-primary-soft);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.is-active{color:var(--c-primary);}
.nav-link.is-active::after{transform:scaleX(1);}
.nav-toggle{
  display:none;width:42px;height:42px;border-radius:var(--r-sm);
  align-items:center;justify-content:center;flex-direction:column;gap:5px;
  border:1px solid var(--c-line);background:#fff;
}
.nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--c-ink);transition:transform .25s ease,opacity .2s ease;}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0;}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}
.mobile-drawer{
  display:none;background:#fff;border-top:1px solid var(--c-line);
  padding:8px var(--gutter) 20px;
}
.mobile-drawer.is-open{display:block;}
.mobile-drawer a{
  display:block;height:52px;line-height:52px;font-size:15.5px;font-weight:600;
  color:var(--c-ink-2);border-bottom:1px solid var(--c-line);
}
.mobile-drawer a:last-child{border-bottom:0;}
.mobile-drawer a.is-active{color:var(--c-primary);}
.drawer-mask{
  display:none;position:fixed;inset:72px 0 0;background:rgba(14,27,46,.35);z-index:55;
}
.drawer-mask.is-open{display:block;}

/* ---------- Hero ---------- */
.hero-cat{padding:28px 0 0;}
.hero-panel{
  position:relative;overflow:hidden;border-radius:var(--r-hero);
  background:#0E1B2E;min-height:400px;display:flex;align-items:flex-end;
}
.hero-panel__img{
  position:absolute;inset:0;width:100%;height:100%;object-fit:cover;
}
.hero-panel__mask{
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(14,27,46,.30) 0%,rgba(14,27,46,.55) 55%,rgba(14,27,46,.78) 100%);
}
.hero-panel__body{
  position:relative;padding:44px 40px 40px;max-width:760px;color:#fff;
}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;
  background:var(--c-accent);color:#fff;border-radius:var(--r-pill);
  font-size:12.5px;font-weight:700;padding:6px 14px;letter-spacing:.04em;
}
.hero-panel h1{
  margin-top:18px;font-size:clamp(28px,3.6vw,46px);line-height:1.18;font-weight:700;letter-spacing:-.5px;
}
.hero-panel h1 em{font-style:normal;color:#FFD9C7;}
.hero-sub{margin-top:16px;font-size:16.5px;line-height:1.8;color:rgba(255,255,255,.88);max-width:600px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:26px;}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 24px;border-radius:var(--r-sm);
  font-size:15px;font-weight:600;letter-spacing:.01em;
  transition:transform .18s ease,box-shadow .22s ease,background .2s ease,color .2s ease,border-color .2s ease;
  cursor:pointer;
}
.btn:active{transform:translateY(1px);}
.btn--primary{background:var(--c-primary);color:#fff;box-shadow:var(--sh-2);}
.btn--primary:hover{background:var(--c-primary-dark);color:#fff;box-shadow:var(--sh-hover);}
.btn--ghost{background:rgba(255,255,255,.10);color:#fff;border:1px solid rgba(255,255,255,.55);}
.btn--ghost:hover{background:#fff;color:var(--c-ink);border-color:#fff;}
.btn--line{background:#fff;color:var(--c-primary);border:1px solid var(--c-primary);}
.btn--line:hover{background:var(--c-primary-soft);color:var(--c-primary-dark);}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed;transform:none;box-shadow:none;}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px;}
.hero-tags span{
  font-size:13px;font-weight:600;color:rgba(255,255,255,.9);
  border:1px solid rgba(255,255,255,.35);border-radius:var(--r-pill);padding:5px 14px;
  font-variant-numeric:tabular-nums;
}

/* ---------- Stat bar ---------- */
.statbar{
  margin-top:20px;background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);
  box-shadow:var(--sh-1);
  display:grid;grid-template-columns:repeat(4,1fr);
}
.statbar__item{padding:22px 24px;border-right:1px solid var(--c-line);}
.statbar__item:last-child{border-right:0;}
.statbar__num{font-size:26px;font-weight:700;color:var(--c-primary);font-variant-numeric:tabular-nums;line-height:1.2;}
.statbar__label{margin-top:6px;font-size:13.5px;color:var(--c-ink-3);font-weight:500;}

/* ---------- 横滑片库 ---------- */
.rail-head{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-bottom:24px;}
.rail-head h2{font-size:clamp(21px,2.2vw,28px);font-weight:700;line-height:1.3;}
.rail-head p{margin-top:8px;font-size:14.5px;color:var(--c-ink-2);}
.rail-ctrl{display:flex;align-items:center;gap:10px;}
.rail-btn{
  width:40px;height:40px;border-radius:var(--r-pill);background:#fff;border:1px solid var(--c-line);
  display:flex;align-items:center;justify-content:center;color:var(--c-ink-2);
  transition:background .2s ease,color .2s ease,border-color .2s ease,transform .18s ease;
}
.rail-btn:hover{background:var(--c-primary);border-color:var(--c-primary);color:#fff;}
.rail-btn:active{transform:translateY(1px);}
.rail-wrap{position:relative;}
.rail{
  display:flex;gap:20px;overflow-x:auto;scroll-snap-type:x mandatory;
  padding:6px 2px 18px;scrollbar-width:none;-ms-overflow-style:none;
}
.rail::-webkit-scrollbar{display:none;}
.rail::after{content:"";flex:0 0 8px;}
.rail-card{
  flex:0 0 228px;width:228px;scroll-snap-align:start;
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);
  overflow:hidden;box-shadow:var(--sh-1);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.rail-card:hover{transform:translateY(-4px);box-shadow:var(--sh-hover);border-color:#D3DEF2;}
.rail-thumb{position:relative;aspect-ratio:2/3;overflow:hidden;background:var(--c-surface-2);}
.rail-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .25s ease;}
.rail-card:hover .rail-thumb img{transform:scale(1.03);}
.rail-badge{
  position:absolute;top:10px;left:10px;z-index:2;
  font-size:12px;font-weight:700;color:#fff;border-radius:var(--r-pill);
  padding:4px 10px;background:rgba(14,27,46,.72);
}
.rail-badge--live{background:var(--c-accent);}
.rail-body{padding:14px 16px 16px;}
.rail-body h3{font-size:16px;font-weight:600;line-height:1.45;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;min-height:46px;}
.rail-meta{margin-top:10px;font-size:13px;color:var(--c-ink-3);display:flex;align-items:center;gap:8px;font-variant-numeric:tabular-nums;}
.rail-meta .dot{width:4px;height:4px;border-radius:50%;background:var(--c-line);}

/* ---------- 分类入口卡 ---------- */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;}
.entry-card{
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:26px 24px;box-shadow:var(--sh-1);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
  display:flex;flex-direction:column;
}
.entry-card:hover{transform:translateY(-3px);box-shadow:var(--sh-hover);border-color:#D3DEF2;}
.entry-icon{
  width:44px;height:44px;border-radius:12px;background:var(--c-primary-soft);color:var(--c-primary);
  display:flex;align-items:center;justify-content:center;font-size:18px;font-weight:700;margin-bottom:16px;
}
.entry-card h3{font-size:18px;font-weight:600;line-height:1.45;}
.entry-card p{margin-top:10px;font-size:14.5px;color:var(--c-ink-2);line-height:1.8;flex:1;}
.entry-card .link-more{margin-top:16px;font-size:14px;}

/* ---------- 流程 ---------- */
.flow{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;counter-reset:step;}
.flow-item{
  position:relative;background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:26px 22px 24px;box-shadow:var(--sh-1);
}
.flow-num{
  counter-increment:step;font-size:13px;font-weight:700;color:var(--c-primary);
  background:var(--c-primary-soft);border-radius:var(--r-pill);padding:4px 12px;display:inline-block;
  font-variant-numeric:tabular-nums;
}
.flow-num::before{content:"0" counter(step);}
.flow-item h3{margin-top:14px;font-size:17px;font-weight:600;}
.flow-item p{margin-top:8px;font-size:14.5px;color:var(--c-ink-2);line-height:1.8;}

/* ---------- 推荐卡 ---------- */
.rec-card{
  display:flex;flex-direction:column;background:#fff;border:1px solid var(--c-line);
  border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-1);
  transition:transform .2s ease,box-shadow .2s ease;
}
.rec-card:hover{transform:translateY(-3px);box-shadow:var(--sh-hover);}
.rec-thumb{aspect-ratio:16/9;overflow:hidden;background:var(--c-surface-2);}
.rec-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .25s ease;}
.rec-card:hover .rec-thumb img{transform:scale(1.03);}
.rec-body{padding:20px;display:flex;flex-direction:column;flex:1;}
.rec-tag{
  align-self:flex-start;font-size:12.5px;font-weight:600;color:var(--c-primary);
  background:var(--c-primary-soft);border-radius:var(--r-pill);padding:4px 12px;
}
.rec-body h3{margin-top:12px;font-size:17.5px;font-weight:600;line-height:1.45;}
.rec-body p{margin-top:10px;font-size:14.5px;color:var(--c-ink-2);line-height:1.8;flex:1;}
.rec-foot{margin-top:16px;display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--c-ink-3);font-variant-numeric:tabular-nums;}

/* ---------- FAQ ---------- */
.faq-list{display:grid;gap:14px;max-width:900px;margin:0 auto;}
.faq-item{
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);
  box-shadow:var(--sh-1);overflow:hidden;transition:border-color .2s ease,box-shadow .2s ease;
}
.faq-item[open]{border-color:#CBD9F3;box-shadow:var(--sh-2);}
.faq-item summary{
  list-style:none;cursor:pointer;padding:20px 22px 20px 24px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  font-size:16px;font-weight:600;color:var(--c-ink);position:relative;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--c-primary);
  transform:scaleY(0);transform-origin:top;transition:transform .22s ease;
}
.faq-item[open] summary::before{transform:scaleY(1);}
.faq-caret{
  flex:0 0 auto;width:26px;height:26px;border-radius:50%;background:var(--c-surface-2);
  color:var(--c-ink-2);display:flex;align-items:center;justify-content:center;font-size:12px;
  transition:transform .25s ease,background .2s ease,color .2s ease;
}
.faq-item[open] .faq-caret{transform:rotate(180deg);background:var(--c-primary);color:#fff;}
.faq-answer{padding:0 22px 22px 24px;font-size:15px;line-height:1.85;color:var(--c-ink-2);}

/* ---------- CTA ---------- */
.cta-band{
  background:linear-gradient(45deg,var(--c-primary),var(--c-primary-dark));
  border-radius:var(--r-hero);overflow:hidden;position:relative;
  display:grid;grid-template-columns:1.15fr .85fr;align-items:center;gap:24px;
  padding:48px 48px;
}
.cta-band h2{color:#fff;font-size:clamp(22px,2.6vw,32px);line-height:1.3;font-weight:700;}
.cta-band p{margin-top:14px;color:rgba(255,255,255,.86);font-size:15.5px;max-width:520px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:26px;}
.cta-band .btn--line{background:#fff;border-color:#fff;color:var(--c-primary);}
.cta-band .btn--line:hover{background:var(--c-primary-soft);}
.cta-visual{border-radius:var(--r-card);overflow:hidden;box-shadow:0 18px 40px rgba(0,0,0,.22);}
.cta-visual img{width:100%;aspect-ratio:16/10;object-fit:cover;}

/* ---------- Footer ---------- */
.site-footer{background:#0E1B2E;color:rgba(255,255,255,.78);margin-top:0;padding:64px 0 0;}
.footer-top{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:44px;}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:700;font-size:17px;margin-bottom:16px;}
.footer-brand:hover{color:#fff;opacity:.85;}
.footer-brand .brand-mark{background:linear-gradient(45deg,var(--c-primary),#4C7BEF);}
.footer-about{font-size:14px;line-height:1.85;color:rgba(255,255,255,.62);max-width:340px;}
.footer-col h3{color:#fff;font-size:15px;font-weight:600;margin-bottom:16px;}
.footer-col ul{display:grid;gap:10px;}
.footer-col li a{color:rgba(255,255,255,.68);font-size:14px;}
.footer-col li a:hover{color:#fff;}
.footer-col p{font-size:14px;line-height:1.85;color:rgba(255,255,255,.62);}
.footer-col p a{color:rgba(255,255,255,.8);}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);padding:20px 0 28px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13.5px;color:rgba(255,255,255,.55);
}
.footer-bottom a{color:rgba(255,255,255,.7);}
.footer-bottom a:hover{color:#fff;}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  :root{--sp-block:84px;}
}
@media (max-width:1023px){
  :root{--sp-block:72px;--gutter:20px;}
  .nav--left,.nav--right{display:none;}
  .nav-toggle{display:flex;}
  .header-inner{height:64px;}
  .drawer-mask.is-open{inset:64px 0 0;}
  .brand-text{display:none;}
  .hero-panel{min-height:360px;}
  .statbar{grid-template-columns:repeat(2,1fr);}
  .statbar__item:nth-child(2){border-right:0;}
  .statbar__item:nth-child(1),.statbar__item:nth-child(2){border-bottom:1px solid var(--c-line);}
  .grid-3{grid-template-columns:repeat(2,1fr);}
  .grid-4{grid-template-columns:repeat(2,1fr);}
  .flow{grid-template-columns:repeat(2,1fr);}
  .cta-band{grid-template-columns:1fr;padding:36px 28px;}
  .footer-top{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:767px){
  :root{--sp-block:60px;--gutter:16px;}
  .section--tight{padding:48px 0;}
  .hero-cat{padding:16px 0 0;}
  .hero-panel{min-height:330px;border-radius:16px;}
  .hero-panel__body{padding:30px 22px 28px;}
  .hero-sub{font-size:15px;}
  .hero-actions .btn{flex:1 1 auto;}
  .rail-card{flex:0 0 168px;width:168px;}
  .rail-body h3{font-size:15px;min-height:44px;}
  .grid-3{grid-template-columns:1fr;}
  .flow{grid-template-columns:1fr;}
  .cta-band{padding:30px 22px;}
  .footer-top{grid-template-columns:1fr;gap:28px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .faq-item summary{font-size:15.5px;padding:18px 18px 18px 20px;}
  .faq-answer{padding:0 18px 20px 20px;}
}
@media (max-width:479px){
  .grid-4{grid-template-columns:1fr;}
  .statbar{grid-template-columns:1fr;}
  .statbar__item{border-right:0;border-bottom:1px solid var(--c-line);}
  .statbar__item:last-child{border-bottom:0;}
}

/* roulang page: article */
:root{
  --c-bg:#F5F7FB;
  --c-surface:#FFFFFF;
  --c-surface-2:#EEF3FB;
  --c-primary:#1B4FD8;
  --c-primary-dark:#12389E;
  --c-primary-soft:#E3ECFF;
  --c-accent:#FF6B2C;
  --c-accent-soft:#FFEDE4;
  --c-ink:#0E1B2E;
  --c-ink-2:#46566E;
  --c-ink-3:#8494AB;
  --c-line:#E2E8F2;
  --c-ok:#17A673;
  --c-warn:#F0A32A;
  --sh-1:0 1px 2px rgba(14,27,46,.04),0 4px 12px rgba(14,27,46,.05);
  --sh-2:0 8px 24px rgba(27,79,216,.10);
  --sh-hover:0 14px 32px rgba(14,27,46,.12);
  --r-card:16px;
  --r-sm:10px;
  --r-hero:20px;
  --r-cover:12px;
  --w-container:1240px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:system-ui,-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",sans-serif;
  font-size:16px;line-height:1.9;color:var(--c-ink);background:var(--c-bg);
  -webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;
}
h1,h2,h3,h4,p,figure,ul,ol{margin:0}
ul,ol{padding:0;list-style:none}
img{max-width:100%;display:block}
a{color:var(--c-primary);text-decoration:none;transition:color .2s ease,border-color .2s ease,background-color .2s ease}
a:hover{color:var(--c-primary-dark)}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
input,textarea,select{font:inherit}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px}
.container{max-width:var(--w-container);margin:0 auto;padding:0 24px}

/* ---------- 按钮 / 徽章 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 24px;border-radius:var(--r-sm);
  font-size:15px;font-weight:600;border:1px solid transparent;white-space:nowrap;
  transition:transform .18s ease,box-shadow .2s ease,background-color .2s ease,color .2s ease,border-color .2s ease;
}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--c-primary);color:#fff;box-shadow:var(--sh-2)}
.btn-primary:hover{background:var(--c-primary-dark);color:#fff;box-shadow:var(--sh-hover)}
.btn-ghost{background:#fff;color:var(--c-ink);border-color:var(--c-line)}
.btn-ghost:hover{border-color:var(--c-primary);color:var(--c-primary)}
.btn-sm{height:38px;padding:0 16px;font-size:14px}
.btn[disabled]{opacity:.45;cursor:not-allowed}
.badge{
  display:inline-flex;align-items:center;gap:6px;height:24px;padding:0 10px;
  border-radius:999px;font-size:12.5px;font-weight:600;line-height:1;
}
.badge-primary{background:var(--c-primary-soft);color:var(--c-primary)}
.badge-accent{background:var(--c-accent-soft);color:var(--c-accent)}
.badge-line{background:#fff;color:var(--c-ink-2);border:1px solid var(--c-line)}

/* ---------- 头部导航：居中 Logo + 两侧导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:80;background:#fff;
  border-bottom:1px solid var(--c-line);
  transition:box-shadow .25s ease;
}
.site-header.is-scrolled{box-shadow:var(--sh-1)}
.header-inner{
  max-width:var(--w-container);margin:0 auto;padding:0 24px;
  height:72px;display:flex;align-items:center;
}
.nav{display:flex;align-items:center;gap:22px}
.nav--left{flex:1 1 0;justify-content:flex-end}
.nav--right{flex:1 1 0;justify-content:flex-start}
.nav-link{
  position:relative;font-size:15px;color:var(--c-ink-2);
  padding:6px 2px;white-space:nowrap;
}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;border-radius:2px;
  background:var(--c-primary);transform:scaleX(0);transform-origin:left;
  transition:transform .22s ease;
}
.nav-link:hover{color:var(--c-primary)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.is-active{color:var(--c-primary);font-weight:600}
.nav-link.is-active::after{transform:scaleX(1)}
.brand{
  flex:0 0 auto;display:flex;align-items:center;gap:10px;padding:0 26px;
  font-size:19px;font-weight:700;color:var(--c-ink);letter-spacing:-.2px;
}
.brand:hover{color:var(--c-ink)}
.brand-mark{
  width:34px;height:34px;border-radius:10px;flex:0 0 auto;
  background:linear-gradient(135deg,var(--c-primary),var(--c-primary-dark));
  color:#fff;display:grid;place-items:center;font-size:17px;font-weight:700;
}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:var(--r-sm);
  border:1px solid var(--c-line);align-items:center;justify-content:center;
}
.nav-toggle:hover{border-color:var(--c-primary)}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--c-ink);border-radius:2px;position:relative}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--c-ink);border-radius:2px;
  transition:transform .2s ease;
}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}
.mobile-menu{
  position:fixed;left:0;right:0;top:60px;z-index:79;background:#fff;
  border-bottom:1px solid var(--c-line);box-shadow:var(--sh-1);
  transform:translateY(-12px);opacity:0;visibility:hidden;
  transition:transform .25s ease,opacity .25s ease,visibility .25s ease;
  max-height:calc(100vh - 60px);overflow-y:auto;
}
.mobile-menu.is-open{transform:none;opacity:1;visibility:visible}
.mobile-menu a{
  display:flex;align-items:center;height:52px;padding:0 20px;font-size:16px;
  color:var(--c-ink);border-bottom:1px solid var(--c-line);
}
.mobile-menu a:last-child{border-bottom:0}
.mobile-menu a.is-active{color:var(--c-primary);font-weight:600;background:var(--c-primary-soft)}
.menu-mask{
  position:fixed;inset:0;z-index:78;background:rgba(14,27,46,.4);
  opacity:0;visibility:hidden;transition:opacity .25s ease,visibility .25s ease;
}
.menu-mask.is-open{opacity:1;visibility:visible}

/* ---------- 面包屑 ---------- */
.crumb-bar{background:#fff;border-bottom:1px solid var(--c-line)}
.crumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  padding:14px 0;font-size:13.5px;color:var(--c-ink-3);line-height:1.6;
}
.crumb a{color:var(--c-ink-2)}
.crumb a:hover{color:var(--c-primary)}
.crumb-sep{color:var(--c-line)}
.crumb-current{color:var(--c-ink);font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:520px}

/* ---------- 文章头部 ---------- */
.article-head{padding:40px 0 0}
.article-title{
  font-size:clamp(26px,3.2vw,40px);line-height:1.25;font-weight:700;
  letter-spacing:-.5px;color:var(--c-ink);margin:16px 0 0;max-width:900px;
}
.article-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px 22px;
  margin-top:20px;font-size:13.5px;color:var(--c-ink-3);
  font-variant-numeric:tabular-nums;
}
.article-meta .meta-item{display:inline-flex;align-items:center;gap:7px}
.article-meta .dot{width:5px;height:5px;border-radius:50%;background:var(--c-line)}
.article-cover{
  margin-top:28px;border-radius:var(--r-hero);overflow:hidden;
  background:var(--c-surface-2);aspect-ratio:16/9;box-shadow:var(--sh-1);
}
.article-cover img{width:100%;height:100%;object-fit:cover}

/* ---------- 阅读区布局 ---------- */
.read-wrap{
  display:grid;grid-template-columns:minmax(0,812px) 268px;
  justify-content:space-between;gap:56px;
  padding:44px 0 0;align-items:start;
}
.read-main{min-width:0}
.article-body{
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:38px 44px;box-shadow:var(--sh-1);
  font-size:16.5px;line-height:1.95;color:var(--c-ink-2);word-break:break-word;
}
.article-body>*:first-child{margin-top:0}
.article-body p{margin:0 0 1em}
.article-body h2{
  font-size:24px;font-weight:700;color:var(--c-ink);line-height:1.35;
  margin:1.8em 0 .7em;padding-left:14px;border-left:4px solid var(--c-primary);
  scroll-margin-top:104px;
}
.article-body h3{
  font-size:19px;font-weight:600;color:var(--c-ink);line-height:1.5;
  margin:1.5em 0 .6em;scroll-margin-top:104px;
}
.article-body h4{font-size:17px;font-weight:600;color:var(--c-ink);margin:1.3em 0 .5em}
.article-body ul,.article-body ol{margin:0 0 1em;padding-left:1.4em}
.article-body ul{list-style:disc}
.article-body ol{list-style:decimal}
.article-body li{margin:.42em 0}
.article-body li::marker{color:var(--c-primary)}
.article-body blockquote{
  margin:1.4em 0;padding:16px 20px;background:var(--c-surface-2);
  border-left:4px solid var(--c-primary);border-radius:0 var(--r-cover) var(--r-cover) 0;
  color:var(--c-ink-2);
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{border-radius:var(--r-cover);margin:1.4em auto;height:auto}
.article-body a{color:var(--c-primary);text-decoration:underline;text-underline-offset:3px}
.article-body table{width:100%;border-collapse:collapse;margin:1.4em 0;font-size:15px}
.article-body th,.article-body td{border:1px solid var(--c-line);padding:10px 14px;text-align:left;vertical-align:top}
.article-body th{background:var(--c-surface-2);font-weight:600;color:var(--c-ink)}
.article-body code{
  background:var(--c-surface-2);color:var(--c-primary-dark);
  padding:2px 6px;border-radius:6px;font-size:.92em;
}
.article-body pre{
  background:#0E1B2E;color:#E6EDF7;padding:18px 20px;border-radius:var(--r-cover);
  overflow-x:auto;margin:1.4em 0;font-size:14px;line-height:1.7;
}
.article-body pre code{background:none;padding:0;color:inherit}
.article-body hr{border:0;border-top:1px solid var(--c-line);margin:2em 0}

/* ---------- 目录侧栏 ---------- */
.toc{
  position:sticky;top:96px;background:#fff;border:1px solid var(--c-line);
  border-radius:var(--r-card);padding:18px;box-shadow:var(--sh-1);
}
.toc-title{font-size:14px;font-weight:700;color:var(--c-ink);letter-spacing:.4px;margin-bottom:10px}
.toc-list{display:flex;flex-direction:column;gap:2px;max-height:56vh;overflow-y:auto}
.toc-link{
  display:block;font-size:13.5px;line-height:1.6;color:var(--c-ink-2);
  padding:7px 10px;border-left:2px solid transparent;border-radius:0 8px 8px 0;
  transition:color .18s ease,background-color .18s ease,border-color .18s ease;
}
.toc-link.toc-h3{padding-left:22px;font-size:13px;color:var(--c-ink-3)}
.toc-link:hover{color:var(--c-primary);background:var(--c-surface-2)}
.toc-link.is-active{color:var(--c-primary);border-left-color:var(--c-primary);background:var(--c-primary-soft);font-weight:600}
.toc-cta{
  display:flex;align-items:center;justify-content:center;gap:6px;
  margin-top:14px;height:40px;border-radius:var(--r-sm);
  background:var(--c-primary-soft);color:var(--c-primary);font-size:14px;font-weight:600;
}
.toc-cta:hover{background:var(--c-primary);color:#fff}

/* ---------- 标签行 ---------- */
.tag-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-top:28px}
.tag-row .tag-label{font-size:13.5px;color:var(--c-ink-3)}
.tag{
  display:inline-flex;align-items:center;height:32px;padding:0 14px;border-radius:999px;
  background:#fff;border:1px solid var(--c-line);color:var(--c-ink-2);font-size:13.5px;
  transition:border-color .2s ease,color .2s ease,background-color .2s ease;
}
.tag:hover{border-color:var(--c-primary);color:var(--c-primary);background:var(--c-primary-soft)}

/* ---------- 上一篇 / 下一篇 ---------- */
.postnav{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:36px}
.postnav a{
  display:block;background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:16px 18px;box-shadow:var(--sh-1);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.postnav a:hover{transform:translateY(-3px);box-shadow:var(--sh-hover);border-color:var(--c-primary-soft)}
.postnav .pn-label{display:block;font-size:12.5px;color:var(--c-ink-3);margin-bottom:6px;letter-spacing:.4px}
.postnav .pn-title{display:block;font-size:15.5px;font-weight:600;color:var(--c-ink);line-height:1.5}
.postnav a:hover .pn-title{color:var(--c-primary)}
.postnav .pn-right{text-align:right}

/* ---------- 相关推荐 ---------- */
.sec{padding:64px 0 0}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:24px}
.sec-head h2{font-size:26px;font-weight:700;letter-spacing:-.3px;color:var(--c-ink);line-height:1.3}
.sec-head p{margin-top:8px;font-size:14.5px;color:var(--c-ink-2)}
.rel-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.rel-card{
  display:flex;flex-direction:column;background:#fff;border:1px solid var(--c-line);
  border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-1);
  transition:transform .2s ease,box-shadow .2s ease;
}
.rel-card:hover{transform:translateY(-3px);box-shadow:var(--sh-hover)}
.rel-thumb{aspect-ratio:16/9;overflow:hidden;background:var(--c-surface-2)}
.rel-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .25s ease}
.rel-card:hover .rel-thumb img{transform:scale(1.03)}
.rel-body{padding:18px;display:flex;flex-direction:column;gap:10px;flex:1}
.rel-body h3{font-size:17px;font-weight:600;line-height:1.45;color:var(--c-ink)}
.rel-card:hover .rel-body h3{color:var(--c-primary)}
.rel-body p{font-size:14px;line-height:1.75;color:var(--c-ink-2)}
.rel-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--c-ink-3)}
.rel-more{color:var(--c-primary);font-weight:600}

/* ---------- CTA 条 ---------- */
.cta-band{
  margin-top:72px;background:linear-gradient(135deg,var(--c-primary),var(--c-primary-dark));
  border-radius:var(--r-hero);padding:44px;display:flex;align-items:center;
  justify-content:space-between;gap:32px;color:#fff;box-shadow:var(--sh-2);
}
.cta-band h2{font-size:26px;font-weight:700;line-height:1.35;letter-spacing:-.3px}
.cta-band p{margin-top:12px;font-size:15px;line-height:1.8;color:rgba(255,255,255,.86);max-width:620px}
.cta-band .btn{background:#fff;color:var(--c-primary);box-shadow:none}
.cta-band .btn:hover{background:var(--c-primary-soft);color:var(--c-primary-dark)}

/* ---------- 空态 ---------- */
.empty-block{
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:64px 32px;text-align:center;box-shadow:var(--sh-1);
}
.empty-icon{
  width:56px;height:56px;border-radius:50%;margin:0 auto 18px;
  background:var(--c-primary-soft);color:var(--c-primary);
  display:grid;place-items:center;font-size:24px;font-weight:700;
}
.empty-block h2{font-size:22px;font-weight:700;color:var(--c-ink)}
.empty-block p{margin:12px auto 24px;max-width:460px;font-size:15px;color:var(--c-ink-2)}

/* ---------- 页脚 ---------- */
.site-footer{background:#0E1B2E;color:#fff;margin-top:88px;padding:64px 0 0}
.footer-top{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.4fr;gap:40px}
.footer-brand{display:inline-flex;align-items:center;gap:10px;font-size:18px;font-weight:700;color:#fff}
.footer-brand:hover{color:#fff}
.footer-brand .brand-mark{background:linear-gradient(135deg,var(--c-primary),#4E7BFF)}
.footer-about{margin-top:16px;font-size:14px;line-height:1.85;color:rgba(255,255,255,.68);max-width:360px}
.footer-col h3{font-size:14px;font-weight:700;letter-spacing:.6px;color:#fff;margin-bottom:18px}
.footer-col ul{display:flex;flex-direction:column;gap:12px}
.footer-col a{font-size:14px;color:rgba(255,255,255,.68)}
.footer-col a:hover{color:#fff}
.footer-col p{font-size:14px;line-height:1.85;color:rgba(255,255,255,.68)}
.footer-bottom{
  margin-top:52px;border-top:1px solid rgba(255,255,255,.12);
  padding:22px 0 28px;display:flex;align-items:center;justify-content:space-between;
  gap:16px;flex-wrap:wrap;font-size:13.5px;color:rgba(255,255,255,.55);
}
.footer-bottom a{color:rgba(255,255,255,.7)}
.footer-bottom a:hover{color:#fff}

/* ---------- 阅读进度 ---------- */
.read-progress{
  position:fixed;left:0;bottom:0;height:3px;width:0;z-index:90;
  background:var(--c-primary);transition:width .12s linear;
}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .read-wrap{grid-template-columns:minmax(0,1fr) 240px;gap:40px}
  .article-body{padding:34px 36px}
}
@media (max-width:1023px){
  .nav{display:none}
  .header-inner{height:60px;padding:0 16px;position:relative}
  .brand{position:absolute;left:50%;transform:translateX(-50%);padding:0;font-size:16px}
  .brand .brand-mark{width:30px;height:30px;font-size:15px}
  .nav-toggle{display:flex;margin-left:auto}
  .container{padding:0 16px}
  .read-wrap{grid-template-columns:minmax(0,1fr);gap:0;padding-top:32px}
  .toc{display:none}
  .article-body{padding:28px 22px}
  .crumb-current{max-width:220px}
  .rel-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .cta-band{flex-direction:column;align-items:flex-start;padding:34px 26px;margin-top:56px}
  .sec{padding:48px 0 0}
  .footer-top{grid-template-columns:1fr 1fr;gap:32px}
  .site-footer{margin-top:64px;padding-top:48px}
  .article-head{padding:28px 0 0}
}
@media (max-width:767px){
  .article-body{font-size:16px}
  .article-body h2{font-size:21px}
  .article-body h3{font-size:18px}
  .postnav{grid-template-columns:1fr}
  .postnav .pn-right{text-align:left}
}
@media (max-width:519px){
  .rel-grid{grid-template-columns:minmax(0,1fr)}
  .footer-top{grid-template-columns:1fr}
  .sec-head{flex-direction:column;align-items:flex-start;gap:12px}
  .sec-head h2{font-size:22px}
  .cta-band h2{font-size:22px}
  .article-title{font-size:24px}
  .article-cover{border-radius:var(--r-cover)}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px}
}

/* roulang page: category2 */
:root{
  --c-bg:#F5F7FB;
  --c-surface:#FFFFFF;
  --c-surface-2:#EEF3FB;
  --c-primary:#1B4FD8;
  --c-primary-dark:#12389E;
  --c-primary-soft:#E3ECFF;
  --c-accent:#FF6B2C;
  --c-accent-soft:#FFEDE4;
  --c-ink:#0E1B2E;
  --c-ink-2:#46566E;
  --c-ink-3:#8494AB;
  --c-line:#E2E8F2;
  --c-success:#17A673;
  --c-warn:#F0A32A;
  --sh-1:0 1px 2px rgba(14,27,46,.04),0 4px 12px rgba(14,27,46,.05);
  --sh-2:0 8px 24px rgba(27,79,216,.10);
  --sh-hover:0 14px 32px rgba(14,27,46,.12);
  --r-card:16px;
  --r-ctrl:10px;
  --r-hero:20px;
  --r-cover:12px;
  --r-pill:999px;
  --container:1240px;
  --gap:24px;
  --sec:96px;
  --font:system-ui,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",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:1.9;
  color:var(--c-ink);
  background:var(--c-bg);
  font-variant-numeric:tabular-nums;
}
img{max-width:100%;display:block;border:0;}
a{color:var(--c-primary);text-decoration:none;transition:color .2s ease,border-color .2s ease,background-color .2s ease,transform .2s ease;}
a:hover{color:var(--c-primary-dark);}
button{font-family:inherit;font-size:inherit;cursor:pointer;}
input,select,textarea{font-family:inherit;font-size:inherit;}
h1,h2,h3,h4,p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;border-radius:6px;}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px;}
.section{padding:var(--sec) 0;}
.section--tight{padding:64px 0;}
.section--alt{background:var(--c-surface-2);}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:36px;flex-wrap:wrap;}
.section-head h2{font-size:30px;line-height:1.3;font-weight:700;letter-spacing:-.3px;}
.section-head p{color:var(--c-ink-2);font-size:15px;margin-top:10px;max-width:720px;}
.link-more{font-size:14px;font-weight:600;color:var(--c-primary);border-bottom:1px solid transparent;padding-bottom:2px;}
.link-more:hover{border-color:var(--c-primary);}

/* header */
.site-header{
  position:sticky;top:0;z-index:60;
  background:var(--c-surface);
  border-bottom:1px solid var(--c-line);
  transition:box-shadow .25s ease;
}
.site-header.is-scrolled{box-shadow:var(--sh-1);}
.header-inner{
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  gap:20px;
  min-height:72px;
}
.nav{display:flex;align-items:center;gap:26px;}
.nav--right{justify-content:flex-end;}
.nav-link{
  position:relative;
  font-size:15px;
  color:var(--c-ink-2);
  font-weight:500;
  padding:6px 0;
  white-space:nowrap;
}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:-4px;height:2px;
  background:var(--c-primary);border-radius:2px;transform:scaleX(0);transform-origin:center;transition:transform .22s ease;
}
.nav-link:hover{color:var(--c-primary);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.is-active{color:var(--c-primary);font-weight:600;}
.nav-link.is-active::after{transform:scaleX(1);}
.brand{display:inline-flex;align-items:center;gap:10px;justify-self:center;}
.brand-mark{
  width:36px;height:36px;flex:0 0 36px;border-radius:11px;
  background:linear-gradient(135deg,var(--c-primary),var(--c-primary-dark));
  color:#fff;font-size:18px;font-weight:700;
  display:flex;align-items:center;justify-content:center;
}
.brand-text{font-size:18px;font-weight:700;letter-spacing:-.2px;color:var(--c-ink);}
.brand:hover .brand-text{color:var(--c-primary);}
.nav-toggle{
  display:none;
  width:42px;height:42px;border-radius:var(--r-ctrl);
  border:1px solid var(--c-line);background:var(--c-surface);
  justify-self:end;position:relative;
}
.nav-toggle span{
  position:absolute;left:11px;right:11px;height:2px;border-radius:2px;background:var(--c-ink);
  transition:transform .25s ease,opacity .2s ease;
}
.nav-toggle span:nth-child(1){top:14px;}
.nav-toggle span:nth-child(2){top:20px;}
.nav-toggle span:nth-child(3){top:26px;}
.nav-toggle.is-open span:nth-child(1){transform:translateY(6px) rotate(45deg);}
.nav-toggle.is-open span:nth-child(2){opacity:0;}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-6px) rotate(-45deg);}
.drawer-mask{
  position:fixed;inset:0;background:rgba(14,27,46,.42);
  opacity:0;visibility:hidden;transition:opacity .25s ease,visibility .25s ease;z-index:70;
}
.drawer-mask.is-open{opacity:1;visibility:visible;}
.mobile-drawer{
  position:fixed;top:0;left:0;right:0;z-index:80;
  background:var(--c-surface);
  padding:16px 24px 24px;
  border-bottom-left-radius:18px;border-bottom-right-radius:18px;
  box-shadow:var(--sh-hover);
  transform:translateY(-110%);
  transition:transform .3s ease;
}
.mobile-drawer.is-open{transform:translateY(0);}
.mobile-drawer h2{font-size:13px;color:var(--c-ink-3);font-weight:600;margin:14px 0 6px;letter-spacing:.4px;}
.mobile-drawer a{
  display:flex;align-items:center;min-height:52px;
  border-bottom:1px solid var(--c-line);
  font-size:15px;color:var(--c-ink-2);font-weight:500;
}
.mobile-drawer a.is-active{color:var(--c-primary);font-weight:600;}
.mobile-close{
  width:100%;height:44px;border-radius:var(--r-ctrl);border:1px solid var(--c-line);
  background:var(--c-surface-2);color:var(--c-ink-2);font-size:14px;margin-top:16px;
}

/* buttons */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:var(--r-ctrl);
  font-size:15px;font-weight:600;border:1px solid transparent;
  transition:transform .18s ease,box-shadow .2s ease,background-color .2s ease,color .2s ease,border-color .2s ease;
  white-space:nowrap;
}
.btn:active{transform:translateY(1px);}
.btn--primary{background:var(--c-primary);color:#fff;box-shadow:var(--sh-2);}
.btn--primary:hover{background:var(--c-primary-dark);color:#fff;box-shadow:var(--sh-hover);}
.btn--ghost{background:var(--c-surface);color:var(--c-primary);border-color:var(--c-line);}
.btn--ghost:hover{border-color:var(--c-primary);color:var(--c-primary-dark);}
.btn--light{background:rgba(255,255,255,.14);color:#fff;border-color:rgba(255,255,255,.55);}
.btn--light:hover{background:#fff;color:var(--c-primary-dark);}
.btn--block{width:100%;}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed;}

/* pill / badge */
.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;letter-spacing:.2px;
  background:var(--c-primary-soft);color:var(--c-primary-dark);
}
.badge--accent{background:var(--c-accent-soft);color:#C7430E;}
.badge--line{background:transparent;border:1px solid var(--c-line);color:var(--c-ink-2);}
.badge--live{background:var(--c-accent);color:#fff;}

/* hero */
.page-hero{
  position:relative;overflow:hidden;
  border-radius:0 0 var(--r-hero) var(--r-hero);
  background:#0E1B2E;
  color:#fff;
}
.page-hero__media{
  position:absolute;inset:0;
  background-image:linear-gradient(100deg,rgba(14,27,46,.88) 0%,rgba(14,27,46,.66) 46%,rgba(14,27,46,.32) 100%),url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;
}
.page-hero__inner{position:relative;padding:76px 0 64px;max-width:760px;}
.crumb{display:flex;align-items:center;gap:8px;font-size:13px;color:rgba(255,255,255,.72);margin-bottom:20px;}
.crumb a{color:rgba(255,255,255,.86);}
.crumb a:hover{color:#fff;text-decoration:underline;}
.page-hero h1{
  font-size:clamp(28px,4vw,48px);line-height:1.16;font-weight:700;letter-spacing:-.5px;color:#fff;
}
.page-hero .hero-sub{
  margin-top:18px;font-size:16px;line-height:1.9;color:rgba(255,255,255,.86);max-width:640px;
}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:30px;}
.hero-tags{display:flex;gap:10px;flex-wrap:wrap;margin-top:28px;}
.hero-tags span{
  font-size:13px;padding:6px 12px;border-radius:var(--r-pill);
  background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.22);color:#fff;
}
.stat-strip{
  display:grid;grid-template-columns:repeat(4,1fr);gap:1px;
  background:var(--c-line);border-top:1px solid var(--c-line);
}
.stat-strip div{background:var(--c-surface);padding:22px 20px;}
.stat-strip strong{display:block;font-size:24px;font-weight:700;color:var(--c-primary);line-height:1.2;}
.stat-strip span{font-size:13px;color:var(--c-ink-3);}

/* catalog layout */
.catalog-layout{display:grid;grid-template-columns:268px minmax(0,1fr);gap:32px;align-items:start;}
.filter-rail{
  position:sticky;top:96px;
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:22px 20px;box-shadow:var(--sh-1);
}
.filter-rail h2{font-size:16px;font-weight:700;margin-bottom:6px;}
.filter-rail .rail-note{font-size:13px;color:var(--c-ink-3);line-height:1.7;margin-bottom:16px;}
.filter-group{margin-bottom:20px;}
.filter-group h3{font-size:13px;color:var(--c-ink-3);font-weight:600;letter-spacing:.4px;margin-bottom:10px;}
.chip-row{display:flex;flex-wrap:wrap;gap:8px;}
.chip{
  height:32px;padding:0 12px;border-radius:var(--r-pill);
  border:1px solid var(--c-line);background:var(--c-surface);color:var(--c-ink-2);
  font-size:13px;display:inline-flex;align-items:center;transition:all .2s ease;
}
.chip:hover{border-color:var(--c-primary);color:var(--c-primary);}
.chip.is-on{background:var(--c-primary);border-color:var(--c-primary);color:#fff;font-weight:600;}
.rail-fact{
  background:var(--c-surface-2);border-radius:var(--r-cover);padding:14px 14px;font-size:13px;color:var(--c-ink-2);line-height:1.75;margin-top:8px;
}
.rail-fact strong{color:var(--c-ink);display:block;font-size:14px;margin-bottom:4px;}

/* game cards */
.catalog-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:var(--gap);}
.game-card{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
  overflow:hidden;display:flex;flex-direction:column;
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.game-card:hover{transform:translateY(-4px);box-shadow:var(--sh-hover);border-color:#D3DEF3;}
.game-card__media{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--c-surface-2);}
.game-card__media img{width:100%;height:100%;object-fit:cover;transition:transform .25s ease;}
.game-card:hover .game-card__media img{transform:scale(1.03);}
.game-card__media .badge{position:absolute;left:12px;top:12px;background:rgba(255,255,255,.94);color:var(--c-primary-dark);}
.game-card__media .badge--hot{background:var(--c-accent);color:#fff;}
.game-card__body{padding:18px 18px 20px;display:flex;flex-direction:column;flex:1;}
.game-card h3{font-size:18px;font-weight:600;line-height:1.45;}
.game-card p{font-size:14px;color:var(--c-ink-2);line-height:1.85;margin-top:10px;flex:1;}
.game-card__meta{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  margin-top:16px;padding-top:14px;border-top:1px solid var(--c-line);
  font-size:13px;color:var(--c-ink-3);
}
.game-card__meta a{font-size:13px;font-weight:600;color:var(--c-primary);}
.game-card__meta a:hover{text-decoration:underline;}

/* feature band */
.band{background:var(--c-surface-2);border-radius:var(--r-card);padding:40px;display:grid;grid-template-columns:1.1fr .9fr;gap:36px;align-items:center;}
.band h2{font-size:26px;font-weight:700;line-height:1.35;}
.band p{color:var(--c-ink-2);font-size:15px;margin-top:14px;}
.band ul{margin-top:18px;display:grid;gap:10px;}
.band li{display:flex;gap:10px;font-size:14px;color:var(--c-ink-2);}
.band li::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--c-primary);margin-top:11px;flex:0 0 6px;}
.band__media img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--r-cover);box-shadow:var(--sh-1);}

/* recommend */
.rec-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:var(--gap);}
.rec-card{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:24px;transition:transform .2s ease,box-shadow .2s ease;
}
.rec-card:hover{transform:translateY(-3px);box-shadow:var(--sh-hover);}
.rec-card h3{font-size:17px;font-weight:600;margin:14px 0 8px;}
.rec-card p{font-size:14px;color:var(--c-ink-2);line-height:1.85;}
.rec-card a.rec-link{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;margin-top:14px;}

/* steps */
.steps{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:var(--gap);counter-reset:step;}
.step{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);padding:24px 22px;
  position:relative;
}
.step::before{
  counter-increment:step;content:"0" counter(step);
  font-size:14px;font-weight:700;color:var(--c-primary);
  display:inline-flex;align-items:center;justify-content:center;
  width:34px;height:34px;border-radius:11px;background:var(--c-primary-soft);
}
.step h3{font-size:16px;font-weight:600;margin:14px 0 8px;}
.step p{font-size:14px;color:var(--c-ink-2);line-height:1.8;}

/* faq */
.faq-list{max-width:900px;margin:0 auto;display:grid;gap:14px;}
.faq-item{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
  overflow:hidden;transition:box-shadow .2s ease,border-color .2s ease;
}
.faq-item[open]{box-shadow:var(--sh-1);border-color:#D3DEF3;}
.faq-item summary{
  list-style:none;cursor:pointer;padding:20px 56px 20px 20px;position:relative;
  font-size:16px;font-weight:600;color:var(--c-ink);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"";position:absolute;right:22px;top:50%;width:9px;height:9px;
  border-right:2px solid var(--c-primary);border-bottom:2px solid var(--c-primary);
  transform:translateY(-70%) rotate(45deg);transition:transform .25s ease;
}
.faq-item[open] summary::after{transform:translateY(-30%) rotate(-135deg);}
.faq-item[open] summary{color:var(--c-primary);}
.faq-body{padding:0 20px 20px 23px;border-left:3px solid var(--c-primary);margin-left:0;font-size:15px;color:var(--c-ink-2);line-height:1.85;}

/* cta */
.cta-band{
  border-radius:var(--r-card);overflow:hidden;
  background:linear-gradient(135deg,var(--c-primary) 0%,var(--c-primary-dark) 100%);
  color:#fff;display:grid;grid-template-columns:1.15fr .85fr;gap:32px;align-items:center;
}
.cta-band__text{padding:44px 40px;}
.cta-band h2{font-size:28px;font-weight:700;line-height:1.32;color:#fff;}
.cta-band p{margin-top:14px;color:rgba(255,255,255,.86);font-size:15px;}
.cta-band__actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:26px;}
.cta-band__media{height:100%;}
.cta-band__media img{width:100%;height:100%;object-fit:cover;min-height:260px;}

/* footer */
.site-footer{background:#0E1B2E;color:rgba(255,255,255,.72);margin-top:96px;}
.footer-top{
  display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:36px;
  padding:56px 0 40px;
}
.footer-brand{display:inline-flex;align-items:center;gap:10px;margin-bottom:16px;}
.footer-brand .brand-mark{width:34px;height:34px;flex:0 0 34px;font-size:17px;}
.footer-brand span:last-child{color:#fff;font-size:17px;font-weight:700;}
.footer-about{font-size:14px;line-height:1.85;color:rgba(255,255,255,.62);max-width:340px;}
.footer-col h3{font-size:15px;color:#fff;font-weight:600;margin-bottom:14px;}
.footer-col ul{display:grid;gap:10px;}
.footer-col li a{font-size:14px;color:rgba(255,255,255,.68);}
.footer-col li a:hover{color:#fff;}
.footer-col p{font-size:14px;line-height:1.8;color:rgba(255,255,255,.62);}
.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,.55);
}
.footer-bottom a{color:rgba(255,255,255,.72);}
.footer-bottom a:hover{color:#fff;}

/* responsive */
@media (max-width:1279px){
  :root{--sec:88px;}
  .catalog-layout{grid-template-columns:240px minmax(0,1fr);}
}
@media (max-width:1023px){
  :root{--sec:72px;}
  .header-inner{grid-template-columns:auto 1fr auto;}
  .nav--left,.nav--right{display:none;}
  .nav-toggle{display:block;}
  .brand{justify-self:center;}
  .catalog-layout{grid-template-columns:1fr;}
  .filter-rail{position:static;}
  .catalog-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .band{grid-template-columns:1fr;padding:32px;}
  .rec-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .steps{grid-template-columns:repeat(2,minmax(0,1fr));}
  .cta-band{grid-template-columns:1fr;}
  .footer-top{grid-template-columns:1fr 1fr;gap:28px;}
  .page-hero__inner{padding:60px 0 52px;}
}
@media (max-width:767px){
  .container{padding:0 16px;}
  .section-head h2{font-size:24px;}
  .stat-strip{grid-template-columns:repeat(2,1fr);}
  .catalog-grid{grid-template-columns:1fr;}
  .rec-grid{grid-template-columns:1fr;}
  .steps{grid-template-columns:1fr;}
  .footer-top{grid-template-columns:1fr;}
  .cta-band__text{padding:32px 24px;}
  .page-hero__inner{padding:48px 0 44px;}
  .brand-text{font-size:16px;}
  .game-card p,.rec-card p{font-size:14px;}
}
@media (max-width:479px){
  .brand-text{font-size:15px;}
  .brand-mark{width:32px;height:32px;flex:0 0 32px;font-size:16px;}
  .hero-actions .btn{width:100%;}
  .section{padding:56px 0;}
}

/* roulang page: category3 */
:root{
  --c-bg:#F5F7FB;
  --c-surface:#FFFFFF;
  --c-surface-2:#EEF3FB;
  --c-primary:#1B4FD8;
  --c-primary-dark:#12389E;
  --c-primary-soft:#E3ECFF;
  --c-accent:#FF6B2C;
  --c-accent-soft:#FFEDE4;
  --c-ink:#0E1B2E;
  --c-ink-2:#46566E;
  --c-ink-3:#8494AB;
  --c-line:#E2E8F2;
  --c-success:#17A673;
  --c-warn:#F0A32A;
  --sh-1:0 1px 2px rgba(14,27,46,.04), 0 4px 12px rgba(14,27,46,.05);
  --sh-2:0 8px 24px rgba(27,79,216,.10);
  --sh-hover:0 14px 32px rgba(14,27,46,.12);
  --r-card:16px;
  --r-sm:10px;
  --r-hero:20px;
  --r-cover:12px;
  --r-pill:999px;
  --w-container:1240px;
  --sp-section:96px;
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--c-bg);
  color:var(--c-ink);
  font-family:system-ui,-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",sans-serif;
  font-size:16px;
  line-height:1.9;
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%;height:auto;}
a{color:inherit;text-decoration:none;}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
table{border-collapse:collapse;width:100%;}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;border-radius:4px;}

/* 容器 */
.container{width:100%;max-width:var(--w-container);margin:0 auto;padding:0 24px;}
.section{padding:var(--sp-section) 0;}
.section--tight{padding:64px 0;}
.section--alt{background:var(--c-surface-2);}
.section-head{max-width:760px;margin-bottom:40px;}
.section-head h2{font-size:30px;line-height:1.3;font-weight:700;letter-spacing:-.3px;}
.section-head p{margin-top:14px;color:var(--c-ink-2);font-size:16px;}
.eyebrow{display:inline-block;font-size:13px;font-weight:600;letter-spacing:.08em;color:var(--c-primary);background:var(--c-primary-soft);border-radius:var(--r-pill);padding:5px 14px;margin-bottom:16px;}

/* 顶部导航 */
.site-header{
  position:sticky;top:0;z-index:60;background:#fff;
  border-bottom:1px solid var(--c-line);
  transition:box-shadow .2s ease;
}
.site-header.is-stuck{box-shadow:var(--sh-1);}
.nav-bar{
  display:grid;grid-template-columns:1fr auto 1fr;align-items:center;
  gap:16px;height:72px;
}
.nav{display:flex;align-items:center;gap:4px;}
.nav--left{justify-content:flex-start;}
.nav--right{justify-content:flex-end;}
.nav-link{
  position:relative;display:inline-block;padding:9px 12px;border-radius:var(--r-sm);
  font-size:15px;color:var(--c-ink-2);transition:color .18s ease,background .18s ease;
}
.nav-link:hover{color:var(--c-primary);background:var(--c-primary-soft);}
.nav-link:active{transform:translateY(1px);}
.nav-link.is-active{color:var(--c-primary);font-weight:600;}
.nav-link.is-active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;
  background:var(--c-primary);border-radius:2px;
}
.brand{display:inline-flex;align-items:center;gap:10px;font-size:17px;font-weight:700;letter-spacing:-.2px;color:var(--c-ink);white-space:nowrap;}
.brand:hover{color:var(--c-primary);}
.brand-mark{
  display:inline-flex;align-items:center;justify-content:center;
  width:32px;height:32px;border-radius:10px;
  background:linear-gradient(135deg,var(--c-primary),var(--c-primary-dark));
  color:#fff;font-size:16px;font-weight:700;flex:0 0 auto;
}
.nav-toggle{
  display:none;align-items:center;justify-content:center;width:44px;height:44px;
  border:1px solid var(--c-line);border-radius:var(--r-sm);background:#fff;
  transition:border-color .18s ease,background .18s ease;
}
.nav-toggle:hover{border-color:var(--c-primary);background:var(--c-primary-soft);}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--c-ink);border-radius:2px;position:relative;}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--c-ink);border-radius:2px;
}
.nav-toggle span::before{top:-6px;}
.nav-toggle span::after{top:6px;}

/* 移动抽屉 */
.drawer{
  position:fixed;top:0;left:0;right:0;z-index:90;background:#fff;
  transform:translateY(-102%);transition:transform .28s ease;
  box-shadow:0 10px 30px rgba(14,27,46,.14);padding:14px 20px 22px;
}
.drawer.is-open{transform:translateY(0);}
.drawer__head{display:flex;align-items:center;justify-content:space-between;padding-bottom:12px;border-bottom:1px solid var(--c-line);}
.drawer__close{
  width:40px;height:40px;border:1px solid var(--c-line);border-radius:var(--r-sm);
  font-size:18px;line-height:1;color:var(--c-ink-2);
}
.drawer__close:hover{border-color:var(--c-primary);color:var(--c-primary);}
.drawer__nav{display:flex;flex-direction:column;padding-top:10px;}
.drawer__nav a{
  display:flex;align-items:center;height:52px;padding:0 6px;font-size:16px;
  color:var(--c-ink-2);border-bottom:1px solid var(--c-line);
}
.drawer__nav a:hover{color:var(--c-primary);}
.drawer__nav a.is-active{color:var(--c-primary);font-weight:600;}
.drawer-mask{
  position:fixed;inset:0;background:rgba(14,27,46,.45);z-index:80;
  opacity:0;visibility:hidden;transition:opacity .25s ease,visibility .25s ease;
}
.drawer-mask.is-open{opacity:1;visibility:visible;}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 24px;border-radius:var(--r-sm);
  font-size:15px;font-weight:600;letter-spacing:.01em;
  transition:transform .16s ease,box-shadow .2s ease,background .2s ease,color .2s ease,border-color .2s ease;
}
.btn--primary{background:var(--c-primary);color:#fff;box-shadow:var(--sh-2);}
.btn--primary:hover{background:var(--c-primary-dark);box-shadow:var(--sh-hover);transform:translateY(-2px);}
.btn--primary:active{transform:translateY(1px);}
.btn--ghost{background:#fff;color:var(--c-ink);border:1px solid var(--c-line);}
.btn--ghost:hover{border-color:var(--c-primary);color:var(--c-primary);transform:translateY(-2px);}
.btn--ghost:active{transform:translateY(1px);}
.btn--light{background:#fff;color:var(--c-primary);}
.btn--light:hover{background:var(--c-primary-soft);transform:translateY(-2px);}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed;transform:none;box-shadow:none;}
.link-arrow{
  display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:600;color:var(--c-primary);
}
.link-arrow::after{content:"→";transition:transform .2s ease;}
.link-arrow:hover::after{transform:translateX(4px);}

/* 首屏 */
.page-hero{position:relative;isolation:isolate;overflow:hidden;background:#0E1B2E;}
.page-hero__bg{
  position:absolute;inset:0;background-image:url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;z-index:-2;
}
.page-hero__mask{
  position:absolute;inset:0;z-index:-1;
  background:linear-gradient(180deg,rgba(14,27,46,.72) 0%,rgba(14,27,46,.46) 52%,rgba(14,27,46,.80) 100%);
}
.page-hero__inner{max-width:860px;padding:96px 0 84px;color:#fff;}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:rgba(255,255,255,.72);margin-bottom:20px;}
.crumb a{color:rgba(255,255,255,.86);}
.crumb a:hover{color:#fff;text-decoration:underline;}
.crumb span.sep{opacity:.55;}
.page-hero h1{
  font-size:clamp(30px,4.2vw,50px);line-height:1.16;font-weight:700;letter-spacing:-.5px;
}
.page-hero__sub{
  margin-top:20px;font-size:17px;line-height:1.85;color:rgba(255,255,255,.84);max-width:680px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px;}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:30px;}
.tag-pill{
  display:inline-flex;align-items:center;gap:8px;
  padding:7px 14px;border-radius:var(--r-pill);
  font-size:13px;color:#fff;background:rgba(255,255,255,.14);
  border:1px solid rgba(255,255,255,.22);
}
.tag-pill b{font-weight:600;color:#fff;font-variant-numeric:tabular-nums;}

/* 标签页签 */
.tabs-bar{
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);
  box-shadow:var(--sh-1);padding:10px;margin-top:-34px;position:relative;z-index:5;
  display:flex;gap:8px;overflow-x:auto;
}
.tabs-bar::-webkit-scrollbar{height:0;}
.tab-btn{
  flex:0 0 auto;height:44px;padding:0 20px;border-radius:var(--r-sm);
  font-size:15px;font-weight:600;color:var(--c-ink-2);
  transition:background .2s ease,color .2s ease;
  white-space:nowrap;
}
.tab-btn:hover{background:var(--c-primary-soft);color:var(--c-primary);}
.tab-btn.is-active{background:var(--c-primary);color:#fff;box-shadow:var(--sh-2);}
.tab-btn:active{transform:translateY(1px);}
.tab-panel{display:none;padding-top:8px;}
.tab-panel.is-active{display:block;animation:fadeUp .32s ease;}
@keyframes fadeUp{from{opacity:0;transform:translateY(10px);}to{opacity:1;transform:translateY(0);}}

/* 图文交错 */
.flow-row{
  display:grid;grid-template-columns:minmax(0,1.02fr) minmax(0,1fr);
  gap:48px;align-items:center;padding:36px 0;
}
.flow-row + .flow-row{border-top:1px dashed var(--c-line);}
.flow-row__media{position:relative;}
.flow-row__media img{
  width:100%;aspect-ratio:16/9;object-fit:cover;
  border-radius:var(--r-card);box-shadow:var(--sh-1);
  transition:transform .25s ease,box-shadow .25s ease;
}
.flow-row__media:hover img{transform:translateY(-3px) scale(1.01);box-shadow:var(--sh-hover);}
.flow-row--rev .flow-row__media{order:2;}
.flow-row__body{max-width:640px;}
.step-index{
  display:inline-flex;align-items:center;justify-content:center;
  width:40px;height:40px;border-radius:12px;margin-bottom:16px;
  background:var(--c-primary-soft);color:var(--c-primary);
  font-size:15px;font-weight:700;font-variant-numeric:tabular-nums;
}
.flow-row__body h3{font-size:19px;font-weight:600;line-height:1.45;letter-spacing:-.2px;}
.flow-row__body > p{margin-top:12px;color:var(--c-ink-2);}
.check-list{margin-top:18px;display:flex;flex-direction:column;gap:10px;}
.check-list li{position:relative;padding-left:26px;font-size:15px;color:var(--c-ink-2);}
.check-list li::before{
  content:"";position:absolute;left:0;top:.72em;width:14px;height:8px;
  border-left:2px solid var(--c-primary);border-bottom:2px solid var(--c-primary);
  transform:rotate(-45deg) translateY(-50%);border-radius:1px;
}
.note{
  margin-top:18px;padding:12px 16px;border-left:3px solid var(--c-accent);
  background:var(--c-accent-soft);border-radius:0 var(--r-sm) var(--r-sm) 0;
  font-size:14px;color:#8A3A12;
}

/* 参数速查卡 */
.fact-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:24px;}
.fact-card{
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:24px 20px;box-shadow:var(--sh-1);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.fact-card:hover{transform:translateY(-4px);box-shadow:var(--sh-hover);border-color:#D3DDF0;}
.fact-card__num{
  font-size:28px;font-weight:700;color:var(--c-primary);
  font-variant-numeric:tabular-nums;letter-spacing:-.5px;
}
.fact-card h3{margin-top:12px;font-size:17px;font-weight:600;line-height:1.5;}
.fact-card p{margin-top:10px;font-size:14px;color:var(--c-ink-2);line-height:1.8;}

/* 常见疑问 */
.faq-list{display:flex;flex-direction:column;gap:14px;max-width:900px;}
.faq-item{
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);
  box-shadow:var(--sh-1);overflow:hidden;transition:border-color .2s ease,box-shadow .2s ease;
}
.faq-item[open]{border-color:#C9D8F6;box-shadow:var(--sh-2);}
.faq-item summary{
  list-style:none;cursor:pointer;position:relative;
  padding:18px 56px 18px 20px;font-size:16px;font-weight:600;line-height:1.6;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::before{
  content:"";position:absolute;left:0;top:14px;bottom:14px;width:3px;
  background:transparent;border-radius:0 3px 3px 0;transition:background .2s ease;
}
.faq-item[open] summary::before{background:var(--c-primary);}
.faq-item summary::after{
  content:"";position:absolute;right:22px;top:50%;width:9px;height:9px;
  border-right:2px solid var(--c-ink-3);border-bottom:2px solid var(--c-ink-3);
  transform:translateY(-70%) rotate(45deg);transition:transform .25s ease;
}
.faq-item[open] summary::after{transform:translateY(-30%) rotate(-135deg);}
.faq-item__body{padding:0 20px 20px;font-size:15px;color:var(--c-ink-2);}

/* 交叉推荐 */
.rec-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:24px;}
.rec-card{
  display:flex;flex-direction:column;background:#fff;border:1px solid var(--c-line);
  border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-1);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.rec-card:hover{transform:translateY(-4px);box-shadow:var(--sh-hover);border-color:#D3DDF0;}
.rec-card__cover{overflow:hidden;}
.rec-card__cover img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .3s ease;}
.rec-card:hover .rec-card__cover img{transform:scale(1.03);}
.rec-card__body{padding:18px;display:flex;flex-direction:column;gap:10px;flex:1;}
.badge{
  align-self:flex-start;font-size:12px;font-weight:600;padding:4px 10px;border-radius:var(--r-pill);
  background:var(--c-primary-soft);color:var(--c-primary);
}
.badge--warm{background:var(--c-accent-soft);color:#B8480F;}
.rec-card h3{font-size:17px;font-weight:600;line-height:1.5;}
.rec-card p{font-size:14px;color:var(--c-ink-2);line-height:1.8;flex:1;}

/* CTA 条带 */
.cta-band{
  border-radius:var(--r-hero);overflow:hidden;
  background:linear-gradient(45deg,var(--c-primary) 0%,var(--c-primary-dark) 100%);
  display:grid;grid-template-columns:minmax(0,1.25fr) minmax(0,1fr);align-items:center;
  color:#fff;box-shadow:var(--sh-2);
}
.cta-band__text{padding:48px 44px;}
.cta-band__text h2{font-size:28px;line-height:1.32;font-weight:700;letter-spacing:-.3px;}
.cta-band__text p{margin-top:14px;font-size:16px;color:rgba(255,255,255,.86);max-width:520px;}
.cta-band__actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:26px;}
.cta-band__link{display:inline-flex;align-items:center;gap:6px;color:#fff;font-weight:600;font-size:15px;}
.cta-band__link:hover{text-decoration:underline;}
.cta-band__media{height:100%;min-height:260px;}
.cta-band__media img{width:100%;height:100%;object-fit:cover;}

/* 页脚 */
.site-footer{background:#0E1B2E;color:rgba(255,255,255,.78);padding:72px 0 28px;margin-top:0;}
.footer-top{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;}
.footer-brand{display:inline-flex;align-items:center;gap:10px;font-size:17px;font-weight:700;color:#fff;}
.footer-about{margin-top:16px;font-size:14px;line-height:1.9;color:rgba(255,255,255,.66);max-width:340px;}
.footer-col h3{font-size:15px;font-weight:600;color:#fff;margin-bottom:16px;}
.footer-col ul{display:flex;flex-direction:column;gap:10px;}
.footer-col li a{font-size:14px;color:rgba(255,255,255,.72);transition:color .2s ease;}
.footer-col li a:hover{color:#fff;text-decoration:underline;}
.footer-col p{font-size:14px;line-height:1.9;color:rgba(255,255,255,.66);}
.footer-bottom{
  margin-top:48px;padding-top:22px;border-top:1px solid rgba(255,255,255,.14);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:13px;color:rgba(255,255,255,.6);
}
.footer-bottom a{color:rgba(255,255,255,.78);}
.footer-bottom a:hover{color:#fff;text-decoration:underline;}

/* 响应式 */
@media (max-width:1023px){
  :root{--sp-section:72px;}
  .nav--left,.nav--right{display:none;}
  .nav-bar{grid-template-columns:44px 1fr 44px;height:60px;}
  .brand{grid-column:2;justify-self:center;font-size:16px;}
  .nav-toggle{display:inline-flex;grid-column:3;justify-self:end;}
  .fact-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .rec-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .flow-row{grid-template-columns:minmax(0,1fr);gap:24px;padding:28px 0;}
  .flow-row--rev .flow-row__media{order:0;}
  .flow-row__body{max-width:none;}
  .cta-band{grid-template-columns:minmax(0,1fr);}
  .cta-band__media{min-height:200px;order:-1;}
  .footer-top{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px;}
}
@media (max-width:767px){
  :root{--sp-section:64px;}
  .container{padding:0 16px;}
  .page-hero__inner{padding:72px 0 72px;}
  .page-hero__sub{font-size:15.5px;}
  .hero-actions .btn{flex:1 1 auto;}
  .tabs-bar{margin-top:-26px;padding:8px;}
  .tab-btn{padding:0 16px;font-size:14px;}
  .section-head h2{font-size:24px;}
  .fact-grid{grid-template-columns:minmax(0,1fr);}
  .rec-grid{grid-template-columns:minmax(0,1fr);}
  .cta-band__text{padding:32px 22px;}
  .cta-band__text h2{font-size:22px;}
  .footer-top{grid-template-columns:minmax(0,1fr);}
  .footer-bottom{flex-direction:column;gap:8px;}
  .brand span.brand-text{font-size:15px;}
}
@media (max-width:520px){
  .brand .brand-text{max-width:150px;overflow:hidden;text-overflow:ellipsis;}
  .fact-card__num{font-size:24px;}
}

/* roulang page: category4 */
:root{
  --c-bg:#F5F7FB;
  --c-surface:#FFFFFF;
  --c-surface-2:#EEF3FB;
  --c-primary:#1B4FD8;
  --c-primary-dark:#12389E;
  --c-primary-soft:#E3ECFF;
  --c-accent:#FF6B2C;
  --c-accent-soft:#FFEDE4;
  --c-ink:#0E1B2E;
  --c-ink-2:#46566E;
  --c-ink-3:#8494AB;
  --c-line:#E2E8F2;
  --c-success:#17A673;
  --c-warn:#F0A32A;
  --r-lg:20px;
  --r-md:16px;
  --r-sm:10px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(14,27,46,.04),0 4px 12px rgba(14,27,46,.05);
  --sh-2:0 8px 24px rgba(27,79,216,.10);
  --sh-hover:0 14px 32px rgba(14,27,46,.12);
  --maxw:1240px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--c-bg);
  color:var(--c-ink);
  font-family:system-ui,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",sans-serif;
  font-size:16px;
  line-height:1.9;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto;}
a{color:var(--c-primary);text-decoration:none;transition:color .2s ease;}
a:hover{color:var(--c-primary-dark);}
h1,h2,h3,h4{margin:0;font-weight:700;color:var(--c-ink);line-height:1.3;}
p{margin:0 0 1em;}
p:last-child{margin-bottom:0;}
ul,ol{margin:0;padding:0;list-style:none;}
button,input{font-family:inherit;font-size:inherit;}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;border-radius:4px;}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 24px;}
.tnum{font-variant-numeric:tabular-nums;}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:#fff;
  border-bottom:1px solid var(--c-line);
  transition:box-shadow .25s ease;
}
.site-header.is-scrolled{box-shadow:var(--sh-1);}
.header-inner{
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  gap:16px;
  min-height:72px;
}
.brand{
  justify-self:center;
  display:inline-flex;
  align-items:center;
  gap:10px;
  color:var(--c-ink);
  font-weight:700;
  font-size:17px;
  letter-spacing:.2px;
  white-space:nowrap;
}
.brand:hover{color:var(--c-primary);}
.brand-mark{
  width:32px;height:32px;flex:0 0 32px;
  display:inline-flex;align-items:center;justify-content:center;
  border-radius:10px;
  background:linear-gradient(135deg,var(--c-primary),var(--c-primary-dark));
  color:#fff;font-size:15px;font-weight:700;
}
.nav{display:flex;align-items:center;gap:6px;}
.nav--left{justify-content:flex-start;}
.nav--right{justify-content:flex-end;}
.nav-link{
  position:relative;
  display:inline-block;
  padding:8px 12px;
  border-radius:var(--r-sm);
  color:var(--c-ink-2);
  font-size:15px;
  white-space:nowrap;
  transition:color .2s ease,background-color .2s ease;
}
.nav-link:hover{color:var(--c-primary);background:var(--c-primary-soft);}
.nav-link.is-active{color:var(--c-primary);font-weight:600;}
.nav-link.is-active::after{
  content:"";
  position:absolute;left:12px;right:12px;bottom:2px;
  height:2px;border-radius:2px;background:var(--c-primary);
}
.nav-toggle{
  display:none;
  justify-self:end;
  height:40px;padding:0 14px;
  border:1px solid var(--c-line);
  border-radius:var(--r-sm);
  background:#fff;
  color:var(--c-ink);
  font-size:14px;
  cursor:pointer;
  transition:border-color .2s ease,color .2s ease,background-color .2s ease;
}
.nav-toggle:hover{border-color:var(--c-primary);color:var(--c-primary);background:var(--c-primary-soft);}
.nav-toggle:active{transform:translateY(1px);}
.mobile-nav{
  display:none;
  border-top:1px solid var(--c-line);
  background:#fff;
  padding:8px 0 14px;
}
.mobile-nav.is-open{display:block;}
.mobile-nav a{
  display:block;
  padding:12px 24px;
  min-height:52px;
  line-height:28px;
  color:var(--c-ink-2);
  font-size:15px;
  border-bottom:1px solid var(--c-surface-2);
}
.mobile-nav a:last-child{border-bottom:0;}
.mobile-nav a.is-active{color:var(--c-primary);font-weight:600;background:var(--c-primary-soft);}

/* ---------- buttons / tags ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 22px;
  border-radius:var(--r-pill);
  border:1px solid transparent;
  font-size:15px;font-weight:600;
  cursor:pointer;
  transition:background-color .2s ease,color .2s ease,border-color .2s ease,box-shadow .2s ease,transform .15s ease;
}
.btn:active{transform:translateY(1px);}
.btn--primary{background:var(--c-primary);color:#fff;box-shadow:var(--sh-2);}
.btn--primary:hover{background:var(--c-primary-dark);color:#fff;box-shadow:var(--sh-hover);}
.btn--ghost{background:#fff;border-color:var(--c-line);color:var(--c-ink);}
.btn--ghost:hover{border-color:var(--c-primary);color:var(--c-primary);background:var(--c-primary-soft);}
.btn--light{background:#fff;color:var(--c-primary);}
.btn--light:hover{background:var(--c-primary-soft);color:var(--c-primary-dark);}
.btn[disabled]{opacity:.45;cursor:not-allowed;box-shadow:none;transform:none;}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:6px 14px;
  border-radius:var(--r-pill);
  background:rgba(255,255,255,.16);
  border:1px solid rgba(255,255,255,.42);
  color:#fff;
  font-size:13px;
  line-height:1.6;
  backdrop-filter:blur(2px);
}
.badge{
  display:inline-flex;align-items:center;
  padding:3px 10px;
  border-radius:var(--r-pill);
  background:var(--c-primary-soft);
  color:var(--c-primary-dark);
  font-size:12px;font-weight:600;
}
.badge--accent{background:var(--c-accent-soft);color:#C2451A;}

/* ---------- hero ---------- */
.page-hero{position:relative;color:#fff;overflow:hidden;}
.page-hero__bg{
  position:absolute;inset:0;
  background-image:url("/assets/images/backpic/back-2.webp");
  background-size:cover;
  background-position:center;
}
.page-hero__bg::after{
  content:"";
  position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(14,27,46,.86) 0%,rgba(14,27,46,.62) 52%,rgba(14,27,46,.34) 100%);
}
.page-hero__inner{
  position:relative;
  padding:72px 0 68px;
  max-width:760px;
}
.crumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;color:rgba(255,255,255,.78);
  margin-bottom:20px;
}
.crumb a{color:rgba(255,255,255,.88);}
.crumb a:hover{color:#fff;text-decoration:underline;}
.crumb span.sep{color:rgba(255,255,255,.5);}
.page-hero h1{
  color:#fff;
  font-size:clamp(28px,3.6vw,46px);
  letter-spacing:-.5px;
  line-height:1.16;
  margin-bottom:16px;
}
.page-hero__sub{
  font-size:17px;
  line-height:1.85;
  color:rgba(255,255,255,.88);
  max-width:640px;
  margin-bottom:26px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:26px;}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;}

/* ---------- sections ---------- */
.section{padding:88px 0;}
.section--tight{padding:64px 0 88px;}
.section--soft{background:var(--c-surface);}
.section-head{max-width:760px;margin-bottom:40px;}
.section-head--center{margin-left:auto;margin-right:auto;text-align:center;}
.section-title{font-size:clamp(23px,2.6vw,30px);letter-spacing:-.3px;margin-bottom:14px;}
.section-desc{color:var(--c-ink-2);font-size:16px;line-height:1.9;}
.eyebrow{
  display:inline-block;
  margin-bottom:12px;
  padding:4px 12px;
  border-radius:var(--r-pill);
  background:var(--c-primary-soft);
  color:var(--c-primary-dark);
  font-size:13px;font-weight:600;
}

/* ---------- lead block ---------- */
.lead{
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--r-lg);
  box-shadow:var(--sh-1);
  padding:32px;
  display:grid;
  grid-template-columns:1.4fr 1fr;
  gap:32px;
  align-items:start;
}
.lead h2{font-size:22px;margin-bottom:14px;}
.lead p{color:var(--c-ink-2);}
.lead-points{display:grid;gap:14px;}
.lead-points li{
  display:flex;gap:12px;
  padding:14px 16px;
  background:var(--c-surface-2);
  border-radius:var(--r-md);
  font-size:15px;
  color:var(--c-ink-2);
  line-height:1.75;
}
.lead-points li strong{color:var(--c-ink);display:block;font-size:15px;margin-bottom:2px;}
.dot{
  flex:0 0 8px;width:8px;height:8px;border-radius:50%;
  background:var(--c-primary);margin-top:12px;
}

/* ---------- duo cards ---------- */
.duo-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;}
.data-card{
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--r-lg);
  box-shadow:var(--sh-1);
  overflow:hidden;
  display:flex;
  flex-direction:column;
  transition:transform .2s ease,box-shadow .2s ease;
}
.data-card:hover{transform:translateY(-3px);box-shadow:var(--sh-hover);}
.data-card__media{position:relative;overflow:hidden;aspect-ratio:16/9;background:var(--c-surface-2);}
.data-card__media img{width:100%;height:100%;object-fit:cover;transition:transform .2s ease;}
.data-card:hover .data-card__media img{transform:scale(1.03);}
.data-card__flag{
  position:absolute;left:14px;top:14px;
  padding:4px 12px;border-radius:var(--r-pill);
  background:var(--c-accent);color:#fff;
  font-size:12px;font-weight:600;
}
.data-card__body{padding:24px;display:flex;flex-direction:column;gap:14px;flex:1;}
.data-card__body h3{font-size:19px;}
.data-card__body p{color:var(--c-ink-2);font-size:15px;line-height:1.85;}
.check-list{display:grid;gap:10px;margin-top:4px;}
.check-list li{
  position:relative;
  padding-left:24px;
  font-size:14px;
  color:var(--c-ink-2);
  line-height:1.75;
}
.check-list li::before{
  content:"";
  position:absolute;left:0;top:9px;
  width:10px;height:10px;border-radius:3px;
  background:var(--c-primary-soft);
  border:2px solid var(--c-primary);
}

/* ---------- timeline ---------- */
.timeline{position:relative;display:grid;gap:20px;counter-reset:step;}
.timeline__item{
  position:relative;
  display:grid;
  grid-template-columns:64px 1fr;
  gap:20px;
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--r-md);
  padding:22px 24px;
  box-shadow:var(--sh-1);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.timeline__item:hover{transform:translateY(-2px);box-shadow:var(--sh-hover);border-color:var(--c-primary-soft);}
.timeline__index{
  width:44px;height:44px;
  display:flex;align-items:center;justify-content:center;
  border-radius:14px;
  border:2px solid var(--c-primary);
  color:var(--c-primary);
  font-weight:700;
  font-size:16px;
  font-variant-numeric:tabular-nums;
}
.timeline__item:first-child .timeline__index{background:var(--c-accent);border-color:var(--c-accent);color:#fff;}
.timeline__content h3{font-size:17px;margin-bottom:6px;}
.timeline__content p{color:var(--c-ink-2);font-size:15px;line-height:1.85;}
.timeline__meta{font-size:13px;color:var(--c-ink-3);margin-top:8px;}

/* ---------- metrics ---------- */
.metric-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;}
.metric-card{
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--r-md);
  padding:22px;
  box-shadow:var(--sh-1);
  transition:transform .2s ease,box-shadow .2s ease;
}
.metric-card:hover{transform:translateY(-3px);box-shadow:var(--sh-hover);}
.metric-card__value{
  font-size:30px;font-weight:700;color:var(--c-primary);
  font-variant-numeric:tabular-nums;letter-spacing:-.5px;line-height:1.2;
}
.metric-card__label{font-size:15px;font-weight:600;margin:8px 0 6px;}
.metric-card__note{font-size:13px;color:var(--c-ink-3);line-height:1.7;}

/* ---------- cross links ---------- */
.cross-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;}
.cross-card{
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--r-md);
  overflow:hidden;
  box-shadow:var(--sh-1);
  display:flex;flex-direction:column;
  transition:transform .2s ease,box-shadow .2s ease;
}
.cross-card:hover{transform:translateY(-3px);box-shadow:var(--sh-hover);}
.cross-card__media{aspect-ratio:2/3;overflow:hidden;background:var(--c-surface-2);}
.cross-card__media img{width:100%;height:100%;object-fit:cover;transition:transform .2s ease;}
.cross-card:hover .cross-card__media img{transform:scale(1.03);}
.cross-card__body{padding:16px 18px 20px;display:flex;flex-direction:column;gap:8px;flex:1;}
.cross-card__body h3{font-size:16px;}
.cross-card__body p{font-size:13px;color:var(--c-ink-2);line-height:1.75;}
.cross-card__link{margin-top:auto;font-size:14px;font-weight:600;color:var(--c-primary);}
.cross-card__link::after{content:" →";}

/* ---------- CTA ---------- */
.cta-band{background:var(--c-surface-2);border-top:1px solid var(--c-line);border-bottom:1px solid var(--c-line);}
.cta-inner{
  display:grid;
  grid-template-columns:1.5fr 1fr;
  gap:32px;
  align-items:center;
  padding:56px 0;
}
.cta-inner h2{font-size:clamp(22px,2.4vw,28px);margin-bottom:12px;}
.cta-inner p{color:var(--c-ink-2);max-width:620px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;justify-content:flex-end;}
.text-link{font-weight:600;color:var(--c-primary);}
.text-link::after{content:" →";}
.text-link:hover{color:var(--c-primary-dark);}

/* ---------- FAQ ---------- */
.faq{display:grid;gap:14px;max-width:900px;}
.faq-item{
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--r-md);
  box-shadow:var(--sh-1);
  overflow:hidden;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.faq-item[open]{border-color:var(--c-primary-soft);box-shadow:var(--sh-2);}
.faq-item summary{
  list-style:none;
  cursor:pointer;
  position:relative;
  padding:20px 56px 20px 22px;
  font-size:16px;
  font-weight:600;
  color:var(--c-ink);
  line-height:1.6;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"+";
  position:absolute;right:22px;top:50%;
  transform:translateY(-50%);
  width:26px;height:26px;
  display:flex;align-items:center;justify-content:center;
  border-radius:50%;
  background:var(--c-primary-soft);
  color:var(--c-primary);
  font-size:17px;font-weight:700;
  transition:transform .25s ease,background-color .25s ease,color .25s ease;
}
.faq-item[open] summary::after{content:"−";transform:translateY(-50%) rotate(180deg);background:var(--c-primary);color:#fff;}
.faq-item summary:hover{color:var(--c-primary);}
.faq-item__body{
  position:relative;
  padding:0 22px 22px 22px;
  color:var(--c-ink-2);
  font-size:15px;
  line-height:1.85;
  border-left:3px solid var(--c-primary);
  margin-left:0;
}
.faq-item__body p{padding-left:0;}

/* ---------- footer ---------- */
.site-footer{background:#0E1B2E;color:rgba(255,255,255,.78);margin-top:0;}
.footer-top{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1.2fr;
  gap:36px;
  padding:64px 0 40px;
}
.footer-brand{
  display:inline-flex;align-items:center;gap:10px;
  color:#fff;font-weight:700;font-size:17px;
  margin-bottom:14px;
}
.footer-brand:hover{color:#fff;}
.footer-brand .brand-mark{background:linear-gradient(135deg,#1B4FD8,#4B79F0);}
.footer-about{font-size:14px;line-height:1.85;color:rgba(255,255,255,.68);max-width:380px;}
.footer-col h3{font-size:15px;color:#fff;margin-bottom:16px;font-weight:600;}
.footer-col ul{display:grid;gap:10px;}
.footer-col a{color:rgba(255,255,255,.72);font-size:14px;}
.footer-col a:hover{color:#fff;text-decoration:underline;}
.footer-col p{font-size:14px;line-height:1.85;color:rgba(255,255,255,.68);}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  padding:20px 0 28px;
  border-top:1px solid rgba(255,255,255,.12);
  font-size:13px;
  color:rgba(255,255,255,.6);
}
.footer-bottom a{color:rgba(255,255,255,.72);}
.footer-bottom a:hover{color:#fff;}

/* ---------- responsive ---------- */
@media (max-width:1023px){
  .nav{display:none;}
  .nav-toggle{display:inline-flex;align-items:center;}
  .header-inner{grid-template-columns:1fr auto 1fr;min-height:60px;}
  .brand{font-size:16px;}
  .section{padding:72px 0;}
  .section--tight{padding:52px 0 72px;}
  .duo-grid{grid-template-columns:1fr;}
  .metric-grid{grid-template-columns:repeat(2,1fr);}
  .cross-grid{grid-template-columns:repeat(2,1fr);}
  .lead{grid-template-columns:1fr;padding:26px;}
  .cta-inner{grid-template-columns:1fr;padding:48px 0;}
  .cta-actions{justify-content:flex-start;}
  .footer-top{grid-template-columns:1fr 1fr;gap:28px;padding:52px 0 32px;}
}
@media (max-width:767px){
  .container{padding:0 16px;}
  .page-hero__inner{padding:52px 0 48px;}
  .section{padding:56px 0;}
  .section-head{margin-bottom:28px;}
  .timeline__item{grid-template-columns:52px 1fr;gap:14px;padding:18px;}
  .timeline__index{width:40px;height:40px;font-size:15px;}
  .metric-grid{grid-template-columns:1fr;}
  .cross-grid{grid-template-columns:1fr;}
  .footer-top{grid-template-columns:1fr;gap:26px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .btn{width:100%;}
  .hero-actions{flex-direction:column;align-items:stretch;}
  .cta-actions{width:100%;}
}
@media (min-width:480px) and (max-width:767px){
  .cross-grid{grid-template-columns:repeat(2,1fr);}
}
@media (max-width:519px){
  .brand-text{font-size:15px;}
  .brand-mark{width:28px;height:28px;flex:0 0 28px;font-size:14px;}
  .metric-card__value{font-size:26px;}
}

/* roulang page: category5 */
:root{
  --c-bg:#F5F7FB;
  --c-surface:#FFFFFF;
  --c-surface-2:#EEF3FB;
  --c-primary:#1B4FD8;
  --c-primary-dark:#12389E;
  --c-primary-soft:#E3ECFF;
  --c-accent:#FF6B2C;
  --c-accent-soft:#FFEDE4;
  --c-ink:#0E1B2E;
  --c-ink-2:#46566E;
  --c-ink-3:#8494AB;
  --c-line:#E2E8F2;
  --c-ok:#17A673;
  --c-warn:#F0A32A;
  --r-card:16px;
  --r-sm:10px;
  --r-hero:20px;
  --r-cover:12px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(14,27,46,.04),0 4px 12px rgba(14,27,46,.05);
  --sh-2:0 8px 24px rgba(27,79,216,.10);
  --sh-hover:0 14px 32px rgba(14,27,46,.12);
  --container:1240px;
  --ease:200ms ease;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--c-bg);
  color:var(--c-ink);
  font-family:system-ui,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",sans-serif;
  font-size:16px;
  line-height:1.9;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:var(--c-primary);text-decoration:none;transition:color var(--ease),opacity var(--ease);}
a:hover{color:var(--c-primary-dark);}
button{font-family:inherit;cursor:pointer;}
input,textarea,select{font-family:inherit;font-size:16px;}
h1,h2,h3,h4{margin:0;line-height:1.3;font-weight:700;color:var(--c-ink);}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
table{border-collapse:collapse;width:100%;}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;border-radius:4px;}
.container{max-width:var(--container);margin:0 auto;padding:0 24px;}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:#fff;
  border-bottom:1px solid var(--c-line);
  transition:box-shadow var(--ease);
}
.site-header.is-scrolled{box-shadow:var(--sh-1);}
.header-inner{
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  gap:16px;
  height:72px;
}
.nav{display:flex;align-items:center;gap:26px;}
.nav--left{justify-self:start;}
.nav--right{justify-self:end;}
.nav-link{
  position:relative;
  display:inline-block;
  padding:6px 2px;
  font-size:15px;
  color:var(--c-ink-2);
  white-space:nowrap;
}
.nav-link::after{
  content:"";
  position:absolute;left:0;right:0;bottom:-2px;
  height:2px;border-radius:2px;
  background:var(--c-primary);
  transform:scaleX(0);
  transform-origin:center;
  transition:transform var(--ease);
}
.nav-link:hover{color:var(--c-primary);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.is-active{color:var(--c-primary);font-weight:600;}
.nav-link.is-active::after{transform:scaleX(1);}
.brand{
  display:inline-flex;align-items:center;gap:10px;
  justify-self:center;
  color:var(--c-ink);
  font-size:17px;font-weight:700;letter-spacing:.2px;
  white-space:nowrap;
}
.brand:hover{color:var(--c-primary-dark);}
.brand-mark{
  width:34px;height:34px;border-radius:10px;
  display:grid;place-items:center;
  background:linear-gradient(135deg,var(--c-primary),var(--c-primary-dark));
  color:#fff;font-size:16px;font-weight:700;flex:0 0 auto;
}
.nav-toggle{
  display:none;
  grid-column:3;justify-self:end;
  width:42px;height:42px;border:1px solid var(--c-line);
  background:#fff;border-radius:var(--r-sm);
  align-items:center;justify-content:center;flex-direction:column;gap:5px;
}
.nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--c-ink);transition:transform var(--ease),opacity var(--ease);}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0;}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}
.nav-drawer{
  display:none;
  border-top:1px solid var(--c-line);
  background:#fff;
}
.nav-drawer.is-open{display:block;}
.nav-drawer a{
  display:block;padding:0 24px;height:52px;line-height:52px;
  color:var(--c-ink-2);font-size:15px;border-bottom:1px solid var(--c-line);
}
.nav-drawer a.is-active{color:var(--c-primary);font-weight:600;background:var(--c-primary-soft);}
.nav-drawer a:hover{background:var(--c-surface-2);color:var(--c-primary);}
.mask{
  display:none;position:fixed;inset:72px 0 0 0;
  background:rgba(14,27,46,.35);z-index:55;
}
.mask.is-open{display:block;}

/* ---------- hero ---------- */
.hero{
  position:relative;
  border-radius:var(--r-hero);
  overflow:hidden;
  margin-top:28px;
  background-image:url('/assets/images/backpic/back-2.webp');
  background-size:cover;
  background-position:center;
  min-height:400px;
  display:flex;align-items:center;
}
.hero::after{
  content:"";
  position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(14,27,46,.86) 0%,rgba(14,27,46,.62) 52%,rgba(14,27,46,.28) 100%);
}
.hero-inner{position:relative;z-index:2;padding:56px 48px;max-width:760px;color:#fff;}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;
  padding:5px 14px;border-radius:var(--r-pill);
  background:rgba(255,255,255,.16);
  border:1px solid rgba(255,255,255,.28);
  font-size:13px;letter-spacing:.4px;color:#fff;
  margin-bottom:18px;
}
.hero-badge i{width:7px;height:7px;border-radius:50%;background:var(--c-accent);display:inline-block;}
.hero h1{
  color:#fff;
  font-size:clamp(30px,4.2vw,50px);
  letter-spacing:-.5px;
  line-height:1.15;
  font-weight:700;
}
.hero-sub{
  margin-top:16px;
  font-size:17px;line-height:1.85;
  color:rgba(255,255,255,.88);
  max-width:620px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px;}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 24px;border-radius:var(--r-sm);
  font-size:15px;font-weight:600;border:1px solid transparent;
  transition:background var(--ease),color var(--ease),box-shadow var(--ease),transform var(--ease),border-color var(--ease);
}
.btn-primary{background:var(--c-primary);color:#fff;box-shadow:var(--sh-2);}
.btn-primary:hover{background:var(--c-primary-dark);color:#fff;box-shadow:var(--sh-hover);}
.btn-primary:active{transform:translateY(1px);}
.btn-ghost{background:rgba(255,255,255,.10);color:#fff;border-color:rgba(255,255,255,.55);}
.btn-ghost:hover{background:#fff;color:var(--c-primary);border-color:#fff;}
.btn-outline{background:#fff;color:var(--c-primary);border-color:var(--c-primary);}
.btn-outline:hover{background:var(--c-primary-soft);}
.btn:focus-visible{outline:2px solid #fff;outline-offset:2px;}
.btn[disabled]{opacity:.45;cursor:not-allowed;box-shadow:none;}
.hero-tags{display:flex;flex-wrap:wrap;gap:22px;margin-top:26px;}
.hero-tags div{font-size:14px;color:rgba(255,255,255,.82);}
.hero-tags strong{display:block;font-size:20px;color:#fff;font-variant-numeric:tabular-nums;font-weight:700;letter-spacing:.3px;}

/* ---------- sections ---------- */
.section{padding:88px 0 0;}
.section-head{
  display:flex;align-items:flex-end;justify-content:space-between;gap:20px;
  margin-bottom:26px;
}
.section-head h2{font-size:clamp(22px,2.4vw,30px);letter-spacing:-.2px;}
.section-head p{margin-top:8px;color:var(--c-ink-2);font-size:15px;max-width:720px;}
.section-kicker{
  display:inline-block;font-size:13px;letter-spacing:1px;color:var(--c-primary);
  font-weight:600;margin-bottom:10px;
}
.link-more{font-size:14px;font-weight:600;white-space:nowrap;}
.link-more::after{content:" →";transition:transform var(--ease);}
.lead-card{
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--r-card);
  padding:24px 26px;
  box-shadow:var(--sh-1);
  color:var(--c-ink-2);
  font-size:15.5px;
}
.lead-card strong{color:var(--c-ink);}

/* ---------- faq ---------- */
.faq-list{display:grid;gap:14px;}
.faq-item{
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--r-card);
  box-shadow:var(--sh-1);
  overflow:hidden;
  transition:box-shadow var(--ease),border-color var(--ease);
  position:relative;
}
.faq-item::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:3px;
  background:var(--c-primary);opacity:0;transition:opacity var(--ease);
}
.faq-item[open]::before{opacity:1;}
.faq-item:hover{box-shadow:var(--sh-2);border-color:#CFDDF6;}
.faq-item summary{
  list-style:none;cursor:pointer;
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:20px 24px;
  font-size:16px;font-weight:600;color:var(--c-ink);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"＋";
  font-size:18px;font-weight:400;color:var(--c-primary);
  transition:transform var(--ease);
  flex:0 0 auto;
}
.faq-item[open] summary::after{transform:rotate(45deg);}
.faq-body{
  padding:0 24px 22px;
  color:var(--c-ink-2);
  font-size:15px;line-height:1.8;
}
.faq-body p + p{margin-top:.7em;}

/* ---------- table ---------- */
.table-wrap{
  overflow-x:auto;
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--r-card);
  box-shadow:var(--sh-1);
}
table.compare{min-width:640px;}
table.compare caption{
  caption-side:top;text-align:left;
  padding:20px 22px 8px;
  color:var(--c-ink-3);font-size:13px;
}
table.compare th,table.compare td{
  padding:16px 22px;
  text-align:left;
  border-bottom:1px solid var(--c-line);
  font-size:15px;
  color:var(--c-ink-2);
  vertical-align:top;
}
table.compare thead th{
  background:var(--c-surface-2);
  color:var(--c-ink);
  font-weight:600;
  font-size:14px;
  letter-spacing:.3px;
  border-bottom:1px solid #D6E2F5;
}
table.compare tbody tr:last-child td{border-bottom:none;}
table.compare tbody tr:hover td{background:#FAFCFF;}
table.compare td:first-child{color:var(--c-ink);font-weight:600;}
table.compare .num{font-variant-numeric:tabular-nums;}

/* ---------- panels ---------- */
.panel-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.panel{
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--r-card);
  box-shadow:var(--sh-1);
  overflow:hidden;
  transition:box-shadow var(--ease),transform var(--ease),border-color var(--ease);
}
.panel:hover{box-shadow:var(--sh-2);transform:translateY(-2px);border-color:#CFDDF6;}
.panel summary{
  list-style:none;cursor:pointer;
  padding:18px 20px;
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  font-weight:600;font-size:16px;color:var(--c-ink);
}
.panel summary::-webkit-details-marker{display:none;}
.panel summary::after{
  content:"›";font-size:20px;color:var(--c-primary);
  transition:transform var(--ease);line-height:1;
}
.panel[open] summary::after{transform:rotate(90deg);}
.panel-body{padding:0 20px 20px;color:var(--c-ink-2);font-size:15px;line-height:1.85;}
.panel-tag{
  display:inline-block;margin-bottom:10px;
  padding:3px 10px;border-radius:var(--r-pill);
  background:var(--c-primary-soft);color:var(--c-primary-dark);
  font-size:12px;font-weight:600;
}

/* ---------- cards ---------- */
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.card{
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--r-card);
  overflow:hidden;
  display:flex;flex-direction:column;
  box-shadow:var(--sh-1);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.card:hover{transform:translateY(-4px);box-shadow:var(--sh-hover);border-color:#CFDDF6;}
.card-cover{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--c-surface-2);}
.card-cover img{width:100%;height:100%;object-fit:cover;transition:transform 300ms ease;}
.card:hover .card-cover img{transform:scale(1.03);}
.card-badge{
  position:absolute;top:12px;left:12px;
  padding:3px 10px;border-radius:var(--r-pill);
  background:rgba(255,255,255,.94);
  color:var(--c-primary-dark);
  font-size:12px;font-weight:600;
}
.card-body{padding:18px 20px 20px;display:flex;flex-direction:column;gap:10px;flex:1;}
.card-body h3{font-size:17px;font-weight:600;line-height:1.45;}
.card-body p{color:var(--c-ink-2);font-size:14.5px;line-height:1.8;}
.card-foot{
  margin-top:auto;display:flex;align-items:center;justify-content:space-between;
  padding-top:12px;border-top:1px solid var(--c-line);
  font-size:13px;color:var(--c-ink-3);
}
.card-foot .arrow{color:var(--c-primary);font-weight:600;}

/* ---------- cta ---------- */
.cta-band{
  margin-top:88px;
  background:var(--c-surface-2);
  border:1px solid #DDE7F8;
  border-radius:var(--r-hero);
  overflow:hidden;
  display:grid;grid-template-columns:1.15fr .85fr;
  align-items:center;
}
.cta-text{padding:48px;}
.cta-text h2{font-size:clamp(22px,2.4vw,30px);}
.cta-text p{margin-top:14px;color:var(--c-ink-2);max-width:560px;}
.cta-actions{display:flex;flex-wrap:wrap;align-items:center;gap:18px;margin-top:26px;}
.cta-media{height:100%;min-height:280px;}
.cta-media img{width:100%;height:100%;object-fit:cover;}

/* ---------- breadcrumb ---------- */
.crumb{
  display:flex;align-items:center;gap:8px;flex-wrap:wrap;
  font-size:13.5px;color:var(--c-ink-3);
  padding-top:22px;
}
.crumb a{color:var(--c-ink-2);}
.crumb a:hover{color:var(--c-primary);}
.crumb span.sep{color:var(--c-ink-3);}

/* ---------- footer ---------- */
.site-footer{
  margin-top:96px;
  background:var(--c-ink);
  color:#fff;
  padding:64px 0 0;
}
.footer-top{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.2fr;
  gap:40px;
  padding-bottom:44px;
  border-bottom:1px solid rgba(255,255,255,.14);
}
.footer-brand{
  display:inline-flex;align-items:center;gap:10px;
  color:#fff;font-size:17px;font-weight:700;
}
.footer-brand:hover{color:#B9CDFF;}
.footer-brand .brand-mark{background:rgba(255,255,255,.14);}
.footer-about{
  margin-top:16px;
  color:rgba(255,255,255,.68);
  font-size:14.5px;line-height:1.85;
  max-width:380px;
}
.footer-col h3{
  font-size:15px;color:#fff;margin-bottom:16px;font-weight:600;
}
.footer-col ul{display:grid;gap:11px;}
.footer-col li a{color:rgba(255,255,255,.72);font-size:14.5px;}
.footer-col li a:hover{color:#fff;}
.footer-col p{color:rgba(255,255,255,.68);font-size:14.5px;line-height:1.85;max-width:320px;}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  padding:22px 0 28px;
  color:rgba(255,255,255,.56);font-size:13.5px;
}
.footer-bottom a{color:rgba(255,255,255,.72);}
.footer-bottom a:hover{color:#fff;}

/* ---------- responsive ---------- */
@media (max-width:1023px){
  .header-inner{grid-template-columns:1fr auto 1fr;}
  .nav--left,.nav--right{display:none;}
  .nav-toggle{display:flex;}
  .mask{inset:60px 0 0 0;}
  .header-inner{height:60px;}
  .hero-inner{padding:44px 32px;}
  .section{padding-top:72px;}
  .panel-grid{grid-template-columns:repeat(2,1fr);}
  .card-grid{grid-template-columns:repeat(2,1fr);}
  .footer-top{grid-template-columns:1fr 1fr;gap:32px;}
  .cta-band{grid-template-columns:1fr;}
  .cta-media{min-height:220px;order:-1;}
  .cta-text{padding:36px;}
}
@media (max-width:767px){
  .container{padding:0 16px;}
  .site-header .brand-text{font-size:15px;}
  .hero{border-radius:16px;min-height:420px;margin-top:16px;}
  .hero-inner{padding:32px 22px;}
  .hero-sub{font-size:15.5px;}
  .hero-tags{gap:18px;}
  .hero-tags strong{font-size:18px;}
  .section{padding-top:56px;}
  .section-head{flex-direction:column;align-items:flex-start;gap:10px;}
  .card-grid{grid-template-columns:1fr;}
  .panel-grid{grid-template-columns:1fr;}
  .faq-item summary{padding:16px 18px;font-size:15.5px;}
  .faq-body{padding:0 18px 18px;}
  table.compare th,table.compare td{padding:13px 16px;font-size:14px;}
  .cta-band{margin-top:56px;}
  .cta-text{padding:28px 22px;}
  .footer-top{grid-template-columns:1fr;gap:28px;padding-bottom:32px;}
  .site-footer{margin-top:64px;padding-top:48px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}
@media (max-width:519px){
  .hero{min-height:380px;}
  .btn{width:100%;}
  .hero-actions{flex-direction:column;}
  .cta-actions{flex-direction:column;align-items:stretch;}
}