/* roulang page: index */
:root{
  --brand:#1B5FD0;
  --brand-dark:#1548A6;
  --brand-50:#EEF4FF;
  --accent:#FF7A3D;
  --accent-50:#FFF1E9;
  --accent-ink:#C2410C;
  --teal:#0E9F8A;
  --teal-50:#E6F7F4;
  --teal-ink:#0B7F6E;
  --ink-900:#0E1726;
  --ink-800:#16233A;
  --ink-700:#2A3A52;
  --ink-600:#45566E;
  --ink-400:#7A8AA0;
  --ink-300:#A9B6C8;
  --bg:#F5F7FA;
  --bg-2:#E9EEF6;
  --surface:#FFFFFF;
  --line:#E3E9F2;
  --r-card:16px;
  --r-lg:24px;
  --shadow-1:0 6px 18px rgba(15,30,51,.06);
  --shadow-2:0 14px 34px rgba(15,30,51,.12);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  background:var(--bg);
  color:var(--ink-600);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit;border:0;background:none;cursor:pointer;color:inherit}
h1,h2,h3,h4{margin:0;color:var(--ink-900);letter-spacing:-.3px}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
.shell{width:100%;max-width:1280px;margin:0 auto;padding:0 24px}
@media (max-width:767px){.shell{padding:0 16px}}
.clamp2{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.clamp1{display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden}

/* Header */
.site-header{position:sticky;top:0;z-index:60;background:rgba(245,247,250,.9);backdrop-filter:blur(10px);border-bottom:1px solid transparent;transition:box-shadow .2s ease,border-color .2s ease}
.site-header.scrolled{box-shadow:0 8px 24px rgba(15,30,51,.08);border-bottom-color:var(--line)}
.nav-panel{display:flex;align-items:center;gap:14px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);padding:10px 14px;margin:12px 0;box-shadow:var(--shadow-1)}
.logo{display:flex;align-items:center;gap:10px;flex-shrink:0}
.logo-mark{width:36px;height:36px;border-radius:12px;background:linear-gradient(135deg,#1B5FD0,#3F86F0);color:#fff;display:grid;place-items:center;font-weight:800;font-size:17px;letter-spacing:0}
.logo-text{font-weight:700;font-size:18px;color:var(--ink-900);letter-spacing:-.2px;white-space:nowrap}
.nav-links{display:flex;align-items:center;gap:8px;flex:1;overflow-x:auto;scrollbar-width:none}
.nav-links::-webkit-scrollbar{display:none}
.nav-chip{display:inline-flex;align-items:center;height:40px;padding:0 14px;border-radius:12px;background:var(--brand-50);color:var(--ink-700);font-size:14px;font-weight:500;white-space:nowrap;border:1px solid transparent;transition:background .2s ease,color .2s ease,border-color .2s ease,transform .2s ease}
.nav-chip:hover{background:#fff;border-color:var(--brand);color:var(--brand-dark);transform:translateY(-1px)}
.nav-chip.active{background:#fff;border-color:#CFE0FB;color:var(--brand-dark);font-weight:700;box-shadow:inset 3px 0 0 var(--brand)}
.nav-cta{flex-shrink:0;display:flex;align-items:center;gap:8px}
.nav-toggle{display:none;width:42px;height:42px;border-radius:12px;border:1px solid var(--line);background:#fff;align-items:center;justify-content:center;flex-shrink:0}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink-700);border-radius:2px;position:relative}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--ink-700);border-radius:2px}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}
.nav-drawer{display:none;background:var(--surface);border:1px solid var(--line);border-radius:20px;padding:12px;margin-bottom:12px;box-shadow:var(--shadow-2)}
.nav-drawer.open{display:block}
.drawer-link{display:flex;align-items:center;justify-content:space-between;height:48px;padding:0 14px;border-radius:12px;background:var(--brand-50);color:var(--ink-800);font-size:15px;font-weight:600;margin-bottom:8px}
.drawer-link.active{background:#fff;border:1px solid #CFE0FB;color:var(--brand-dark);box-shadow:inset 3px 0 0 var(--brand)}
.drawer-link .go{color:var(--ink-300);font-weight:700}
.drawer-cta{margin-top:8px;display:flex}
.drawer-cta .btn{width:100%}
@media (max-width:1023px){
  .nav-links{display:none}
  .nav-cta{display:none}
  .nav-toggle{display:flex}
  .nav-panel{gap:10px}
}

/* Buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:48px;padding:0 24px;border-radius:12px;font-size:15px;font-weight:600;border:1px solid transparent;transition:background .2s ease,color .2s ease,border-color .2s ease,box-shadow .2s ease,transform .2s ease}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 8px 18px rgba(27,95,208,.24)}
.btn-primary:hover{background:var(--brand-dark);transform:translateY(-1px);box-shadow:0 12px 26px rgba(27,95,208,.32)}
.btn-primary:active{transform:translateY(0);box-shadow:none}
.btn-primary:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
.btn-ghost{background:#fff;border-color:var(--line);color:var(--ink-800)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand-dark);transform:translateY(-1px)}
.btn-ghost:active{transform:translateY(0)}
.btn-ghost:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
.btn-hero{background:rgba(255,255,255,.14);border-color:rgba(255,255,255,.42);color:#fff;backdrop-filter:blur(4px)}
.btn-hero:hover{background:#fff;color:var(--ink-900);transform:translateY(-1px)}
.btn-hero:focus-visible{outline:2px solid #fff;outline-offset:2px}
.text-link{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--brand);transition:color .2s ease}
.text-link .arrow{transition:transform .2s ease}
.text-link:hover{color:var(--brand-dark)}
.text-link:hover .arrow{transform:translateX(2px)}
.text-link:focus-visible{outline:2px solid var(--brand);outline-offset:3px;border-radius:6px}

/* Badges */
.badge{display:inline-flex;align-items:center;height:22px;padding:0 8px;border-radius:6px;font-size:12px;font-weight:600;background:var(--brand-50);color:var(--brand-dark);white-space:nowrap}
.badge-accent{background:var(--accent-50);color:var(--accent-ink)}
.badge-teal{background:var(--teal-50);color:var(--teal-ink)}

/* Hero */
.hero-section{margin-top:8px}
.hero{position:relative;border-radius:var(--r-lg);overflow:hidden;background-color:#0B1728;background-image:url('/assets/images/backpic/back-1.png');background-size:cover;background-position:center;aspect-ratio:16/9;min-height:460px;display:flex;flex-direction:column;justify-content:flex-end}
.hero::before{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(11,23,40,.92) 0%,rgba(11,23,40,.72) 42%,rgba(11,23,40,.18) 100%)}
.hero-inner{position:relative;z-index:2;padding:clamp(24px,4vw,56px);padding-bottom:calc(clamp(24px,4vw,56px) + 92px);max-width:760px}
.hero-badge{display:inline-flex;align-items:center;height:28px;padding:0 12px;border-radius:999px;background:rgba(14,159,138,.22);border:1px solid rgba(14,159,138,.5);color:#7FE3D2;font-size:12px;font-weight:600;letter-spacing:.4px}
.hero-title{margin-top:18px;color:#fff;font-size:clamp(30px,4.4vw,54px);line-height:1.2;font-weight:800;letter-spacing:-.8px}
.hero-sub{margin-top:16px;color:rgba(255,255,255,.82);font-size:clamp(15px,1.4vw,18px);line-height:1.7;max-width:620px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.hero-thumbs{position:absolute;left:0;right:0;bottom:0;z-index:3;display:flex;gap:12px;padding:0 clamp(16px,4vw,40px) 20px;overflow-x:auto;scrollbar-width:none}
.hero-thumbs::-webkit-scrollbar{display:none}
.hero-thumb{flex:0 0 auto;width:96px;height:54px;border-radius:8px;overflow:hidden;border:2px solid transparent;opacity:.72;transition:opacity .2s ease,border-color .2s ease,transform .2s ease;background:var(--bg-2)}
.hero-thumb img{width:100%;height:100%;object-fit:cover}
.hero-thumb:hover{opacity:1;transform:translateY(-2px)}
.hero-thumb.current{opacity:1;border-color:var(--brand)}
@media (max-width:767px){
  .hero{aspect-ratio:4/5;min-height:520px}
  .hero-inner{max-width:100%;padding-bottom:calc(clamp(24px,4vw,56px) + 84px)}
  .hero-title{letter-spacing:-.4px}
}

/* Sections */
.section{margin-top:96px}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:28px;flex-wrap:wrap}
.sec-title{font-size:clamp(22px,2.4vw,30px);font-weight:700;color:var(--ink-900)}
.sec-sub{margin-top:6px;font-size:14px;color:var(--ink-400)}
@media (max-width:1023px){.section{margin-top:72px}}
@media (max-width:767px){.section{margin-top:56px}}

/* Rail (poster shelf) */
.rail-wrap{position:relative}
.rail{display:flex;gap:16px;overflow-x:auto;scroll-snap-type:x mandatory;padding:4px 4px 12px;scrollbar-width:none}
.rail::-webkit-scrollbar{display:none}
.rail::after{content:"";flex:0 0 1px}
.rail-fade{position:absolute;top:0;right:0;bottom:12px;width:72px;background:linear-gradient(90deg,rgba(245,247,250,0),var(--bg));pointer-events:none}
.rail-arrows{display:flex;gap:8px}
.rail-btn{width:40px;height:40px;border-radius:999px;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow-1);display:inline-flex;align-items:center;justify-content:center;color:var(--ink-700);transition:all .2s ease}
.rail-btn:hover{background:var(--brand);border-color:var(--brand);color:#fff}
.rail-btn:active{transform:scale(.96)}
.rail-btn:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
@media (max-width:767px){.rail-arrows{display:none}.rail-fade{display:none}}

.post-card{flex:0 0 168px;scroll-snap-align:start;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;box-shadow:var(--shadow-1);transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease}
.post-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:#CFE0FB}
.post-cover{aspect-ratio:2/3;background:var(--bg-2);overflow:hidden}
.post-cover img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.post-card:hover .post-cover img{transform:scale(1.04)}
.post-body{padding:12px 12px 14px}
.post-title{margin-top:8px;font-size:15px;font-weight:600;line-height:1.45;color:var(--ink-900);min-height:44px}
@media (max-width:767px){.post-card{flex:0 0 132px}.post-title{font-size:14px}}

/* Generic card */
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--shadow-1);transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease}
a.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:#CFE0FB}
a.card:focus-visible{outline:2px solid var(--brand);outline-offset:3px}
.cover-16x9{aspect-ratio:16/9;background:var(--bg-2);overflow:hidden;border-radius:12px}
.cover-16x9 img{width:100%;height:100%;object-fit:cover}

/* Hot grid */
.hot-feature{display:block;overflow:hidden}
.hot-feature .cover-16x9{border-radius:14px}
.hot-feature-body{padding:18px 4px 4px}
.hot-feature-title{margin-top:10px;font-size:clamp(19px,2vw,22px);font-weight:700;line-height:1.4}
.hot-feature-desc{margin-top:10px;font-size:14px;line-height:1.75;color:var(--ink-600)}
.side-card{position:sticky;top:96px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);padding:20px;box-shadow:var(--shadow-1)}
.side-title{display:flex;align-items:center;gap:8px;font-size:16px;font-weight:700;color:var(--ink-900);margin-bottom:6px}
.side-title::before{content:"";width:3px;height:16px;border-radius:2px;background:var(--brand)}
.rank-row{display:flex;align-items:center;gap:14px;padding:14px 0;border-bottom:1px solid var(--line);transition:background .2s ease}
.rank-row:last-child{border-bottom:0}
.rank-row:hover{background:var(--bg)}
.rank-no{font-size:24px;font-weight:800;color:var(--ink-300);font-variant-numeric:tabular-nums;line-height:1;flex-shrink:0;width:32px}
.rank-row:first-of-type .rank-no{color:var(--accent)}
.rank-body{flex:1;min-width:0}
.rank-name{font-size:15px;font-weight:600;color:var(--ink-800);line-height:1.4}
.rank-meta{font-size:12px;color:var(--ink-400);margin-top:2px}
.rank-thumb{width:48px;height:64px;border-radius:8px;overflow:hidden;background:var(--bg-2);flex-shrink:0}
.rank-thumb img{width:100%;height:100%;object-fit:cover}
@media (max-width:1023px){.side-card{position:static}}

/* Mini horizontal card */
.mini-card{display:flex;gap:14px;padding:14px;border-radius:14px;background:var(--surface);border:1px solid var(--line);transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease}
.mini-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-2);border-color:#CFE0FB}
.mini-card:focus-visible{outline:2px solid var(--brand);outline-offset:3px}
.mini-thumb{width:96px;height:96px;border-radius:10px;overflow:hidden;background:var(--bg-2);flex-shrink:0}
.mini-thumb img{width:100%;height:100%;object-fit:cover}
.mini-title{margin-top:6px;font-size:15px;font-weight:600;color:var(--ink-900);line-height:1.45}
.mini-time{font-size:12px;color:var(--ink-400);margin-top:6px}

/* Feature split */
.split-card{display:grid;grid-template-columns:1fr;gap:0;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;box-shadow:var(--shadow-1);transition:transform .2s ease,box-shadow .2s ease}
a.split-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2)}
.split-media{aspect-ratio:16/10;background:var(--bg-2);overflow:hidden}
.split-media img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
a.split-card:hover .split-media img{transform:scale(1.03)}
.split-body{padding:24px}
.split-title{margin-top:12px;font-size:20px;font-weight:700;line-height:1.4}
.split-desc{margin-top:10px;font-size:14px;line-height:1.8;color:var(--ink-600)}
@media (min-width:768px){.split-card{grid-template-columns:1fr 1.05fr}.split-media{aspect-ratio:auto;height:100%}}

/* Grid cards */
.grid-card{display:flex;flex-direction:column;height:100%;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;box-shadow:var(--shadow-1);transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease}
.grid-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:#CFE0FB}
.grid-card:focus-visible{outline:2px solid var(--brand);outline-offset:3px}
.grid-body{padding:16px 16px 18px;display:flex;flex-direction:column;gap:8px;flex:1}
.grid-title{font-size:16px;font-weight:600;line-height:1.45;color:var(--ink-900)}
.grid-desc{font-size:13.5px;line-height:1.75;color:var(--ink-600)}

/* Numbered list */
.num-row{display:flex;align-items:flex-start;gap:18px;padding:20px;border-radius:14px;background:var(--surface);border:1px solid var(--line);transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease}
.num-row:hover{transform:translateX(4px);box-shadow:var(--shadow-2);border-color:#CFE0FB}
.num-row:focus-visible{outline:2px solid var(--brand);outline-offset:3px}
.num-no{font-size:22px;font-weight:800;color:var(--brand);opacity:.28;font-variant-numeric:tabular-nums;line-height:1.2;flex-shrink:0;width:42px}
.num-title{font-size:16px;font-weight:600;color:var(--ink-900);line-height:1.45}
.num-desc{font-size:13.5px;color:var(--ink-600);line-height:1.75;margin-top:6px}
.num-go{margin-left:auto;color:var(--ink-300);font-size:18px;flex-shrink:0;transition:transform .2s ease,color .2s ease}
.num-row:hover .num-go{transform:translateX(3px);color:var(--brand)}

/* CMS news */
.news-feature{display:block;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;box-shadow:var(--shadow-1);transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease}
.news-feature:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:#CFE0FB}
.news-feature:focus-visible{outline:2px solid var(--brand);outline-offset:3px}
.news-feature-body{padding:22px}
.news-feature-title{margin-top:12px;font-size:clamp(19px,2vw,23px);font-weight:700;line-height:1.42;color:var(--ink-900)}
.news-feature-desc{margin-top:10px;font-size:14.5px;line-height:1.8;color:var(--ink-600)}
.news-meta{display:flex;align-items:center;gap:10px;margin-top:14px;font-size:12.5px;color:var(--ink-400)}
.news-meta .dot{width:3px;height:3px;border-radius:50%;background:var(--ink-300)}
.empty-state{min-height:300px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;text-align:center;background:var(--surface);border:1px dashed #C9D7EA;border-radius:var(--r-card);padding:40px 24px}
.empty-state svg{color:var(--ink-300)}
.empty-title{font-size:15px;font-weight:600;color:var(--ink-800)}
.empty-desc{font-size:13px;color:var(--ink-400)}

/* CTA band */
.cta-band{position:relative;overflow:hidden;border-radius:var(--r-lg);background:linear-gradient(120deg,#123A7D 0%,#1B5FD0 62%,#2F7BE8 100%);color:#fff;padding:clamp(28px,4vw,52px);display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap}
.cta-band::after{content:"";position:absolute;right:-60px;top:-60px;width:260px;height:260px;border-radius:50%;background:rgba(255,255,255,.08)}
.cta-band-title{font-size:clamp(22px,2.6vw,30px);font-weight:700;color:#fff;line-height:1.35;position:relative;z-index:2}
.cta-band-desc{margin-top:10px;font-size:14.5px;color:rgba(255,255,255,.82);max-width:560px;line-height:1.8;position:relative;z-index:2}
.cta-band .btn{position:relative;z-index:2;background:#fff;color:var(--brand-dark)}
.cta-band .btn:hover{background:#EAF1FE;color:var(--brand-dark);transform:translateY(-1px)}
.cta-band .btn:focus-visible{outline:2px solid #fff;outline-offset:3px}

/* FAQ */
.faq-item{background:var(--surface);border:1px solid var(--line);border-radius:14px;margin-bottom:12px;overflow:hidden;transition:border-color .2s ease,box-shadow .2s ease}
.faq-item[open]{border-color:#CFE0FB;box-shadow:var(--shadow-1)}
.faq-item summary{list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:18px 20px;font-size:16px;font-weight:600;color:var(--ink-900);line-height:1.5}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:focus-visible{outline:2px solid var(--brand);outline-offset:-2px}
.faq-plus{width:24px;height:24px;border-radius:8px;background:var(--brand-50);color:var(--brand);display:grid;place-items:center;font-size:15px;font-weight:700;line-height:1;transition:transform .2s ease,background .2s ease,color .2s ease;flex-shrink:0}
.faq-item[open] .faq-plus{background:var(--brand);color:#fff;transform:rotate(45deg)}
.faq-body{padding:0 20px 20px;font-size:15px;line-height:1.85;color:var(--ink-600)}

/* Footer */
.site-footer{margin-top:96px;background:#EDF1F7;border-top:1px solid var(--line);padding-top:56px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.1fr;gap:32px}
.footer-title{font-size:13px;font-weight:700;color:var(--ink-800);letter-spacing:.6px;margin-bottom:14px}
.footer-text{font-size:13.5px;line-height:1.85;color:var(--ink-600);margin-top:14px;max-width:340px}
.footer-link{display:block;font-size:14px;color:var(--ink-600);padding:6px 0;transition:color .2s ease}
.footer-link:hover{color:var(--brand-dark)}
.footer-link:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px}
.footer-info{font-size:13.5px;color:var(--ink-600);line-height:1.9}
.footer-bottom{margin-top:36px;padding:20px 0 32px;border-top:1px solid #DCE4EF;display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;font-size:13px;color:var(--ink-400)}
@media (max-width:1023px){.footer-grid{grid-template-columns:1fr 1fr}}
@media (max-width:767px){.footer-grid{grid-template-columns:1fr;gap:24px}.site-footer{margin-top:56px;padding-top:40px}}

/* Mobile bar */
.mobile-bar{display:none}
@media (max-width:767px){
  body{padding-bottom:72px}
  .mobile-bar{display:flex;position:fixed;left:0;right:0;bottom:0;z-index:70;align-items:center;justify-content:space-between;gap:12px;padding:10px 16px calc(10px + env(safe-area-inset-bottom));background:rgba(255,255,255,.96);border-top:1px solid var(--line);box-shadow:0 -6px 18px rgba(15,30,51,.08)}
  .mobile-bar span{font-size:12.5px;color:var(--ink-400);line-height:1.4}
}

/* roulang page: article */
:root{
  --brand:#1B5FD0;
  --brand-dark:#1548A6;
  --brand-600:#1B5FD0;
  --brand-700:#1548A6;
  --brand-50:#EEF4FF;
  --accent:#FF7A3D;
  --accent-50:#FFF1E9;
  --accent-700:#C2410C;
  --teal:#0E9F8A;
  --teal-50:#E6F6F3;
  --ink-900:#0E1726;
  --ink-800:#1B2942;
  --ink-700:#2A3A52;
  --ink-600:#45566E;
  --ink-400:#7A8AA0;
  --bg:#F5F7FA;
  --surface:#FFFFFF;
  --line:#E3E9F2;
  --radius-lg:22px;
  --radius-md:16px;
  --radius-sm:12px;
  --shadow-1:0 6px 18px rgba(15,30,51,.06);
  --shadow-2:0 14px 34px rgba(15,30,51,.12);
  --font:-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:110px;}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.7;
  color:var(--ink-600);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%;height:auto;}
a{color:inherit;text-decoration:none;}
button{font-family:inherit;cursor:pointer;}
h1,h2,h3,h4,p,ul,ol{margin:0;}
ul,ol{padding-left:0;}
::selection{background:var(--brand);color:#fff;}
.shell{max-width:1280px;margin:0 auto;padding:0 24px;}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(255,255,255,.96);
  border-bottom:1px solid var(--line);
  backdrop-filter:saturate(140%) blur(6px);
}
.nav-card{
  display:flex;align-items:center;gap:16px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:20px;
  padding:10px 14px;
  margin:12px 0;
  box-shadow:var(--shadow-1);
}
.logo{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;}
.logo-mark{
  width:36px;height:36px;border-radius:12px;
  background:var(--brand);color:#fff;
  display:inline-flex;align-items:center;justify-content:center;
  font-weight:800;font-size:18px;letter-spacing:-.2px;
  box-shadow:0 6px 14px rgba(27,95,208,.28);
}
.logo-text{font-size:18px;font-weight:700;color:var(--ink-900);letter-spacing:-.2px;white-space:nowrap;}
.nav-links{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin-left:8px;}
.nav-chip{
  display:inline-flex;align-items:center;gap:6px;
  height:40px;padding:0 14px;
  border-radius:12px;
  background:var(--brand-50);
  color:var(--ink-700);
  font-size:14px;font-weight:600;
  border:1px solid transparent;
  transition:background .2s ease,color .2s ease,border-color .2s ease,box-shadow .2s ease;
}
.nav-chip:hover{background:#fff;border-color:#C9DBFA;color:var(--brand-700);box-shadow:0 4px 12px rgba(15,30,51,.06);}
.nav-chip:focus-visible{outline:2px solid var(--brand);outline-offset:2px;}
.nav-chip.active{background:#fff;color:var(--brand-700);box-shadow:inset 3px 0 0 var(--brand),0 4px 12px rgba(15,30,51,.06);border-color:#D7E3F8;}
.nav-cta{margin-left:auto;display:flex;align-items:center;gap:10px;}
.nav-toggle{
  display:none;margin-left:auto;
  width:44px;height:44px;border-radius:12px;
  border:1px solid var(--line);background:#fff;
  align-items:center;justify-content:center;flex-direction:column;gap:4px;
}
.nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--ink-700);transition:transform .2s ease,opacity .2s ease;}
.nav-toggle:focus-visible{outline:2px solid var(--brand);outline-offset:2px;}
.nav-drawer{display:none;padding-bottom:14px;}
.nav-drawer .drawer-list{display:flex;flex-direction:column;gap:8px;}
.nav-drawer .drawer-list .nav-chip{height:48px;justify-content:flex-start;background:#fff;border:1px solid var(--line);}
.nav-drawer .drawer-list .nav-chip.active{background:var(--brand-50);border-color:#D7E3F8;box-shadow:inset 3px 0 0 var(--brand);}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:12px;
  font-size:15px;font-weight:600;line-height:1;
  border:1px solid transparent;
  transition:background .2s ease,color .2s ease,border-color .2s ease,transform .2s ease,box-shadow .2s ease;
}
.btn:focus-visible{outline:2px solid var(--brand);outline-offset:2px;}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 6px 16px rgba(27,95,208,.24);}
.btn-primary:hover{background:var(--brand-dark);transform:translateY(-1px);box-shadow:0 12px 26px rgba(27,95,208,.28);}
.btn-primary:active{transform:translateY(0);box-shadow:none;}
.btn-ghost{background:#fff;color:var(--ink-800);border-color:var(--line);}
.btn-ghost:hover{border-color:#BCD3F5;color:var(--brand-700);}
.btn-ghost:active{background:var(--brand-50);}
.btn-sm{height:40px;padding:0 16px;font-size:14px;border-radius:12px;}
.btn-block{width:100%;}

/* ---------- 面包屑 & 文章头 ---------- */
.page-head{
  background:linear-gradient(180deg,#FFFFFF 0%,#F8FAFD 62%,rgba(245,247,250,0) 100%);
  border-bottom:1px solid rgba(227,233,242,.7);
  padding-bottom:30px;
}
.breadcrumb{
  display:flex;align-items:center;flex-wrap:wrap;gap:8px;
  font-size:13px;color:var(--ink-400);padding-top:22px;
}
.breadcrumb a{transition:color .2s ease;}
.breadcrumb a:hover{color:var(--brand-700);}
.breadcrumb .sep{color:#C6D0DE;}
.breadcrumb .current{color:var(--ink-700);max-width:64%;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.article-head{max-width:900px;padding-top:18px;}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  height:24px;padding:0 10px;border-radius:6px;
  font-size:12px;font-weight:600;line-height:1;
}
.tag-brand{background:var(--brand-50);color:var(--brand-700);}
.tag-accent{background:var(--accent-50);color:var(--accent-700);}
.tag-teal{background:var(--teal-50);color:#0B7F6E;}
.article-title{
  font-size:clamp(26px,3.2vw,40px);
  line-height:1.3;font-weight:800;color:var(--ink-900);
  letter-spacing:-.3px;margin:16px 0 18px;
  overflow-wrap:break-word;
}
.meta-row{display:flex;align-items:center;flex-wrap:wrap;gap:10px;font-size:13px;color:var(--ink-400);}
.meta-row .dot{width:4px;height:4px;border-radius:50%;background:#C6D0DE;display:inline-block;}

/* ---------- 文章布局 ---------- */
.article-section{padding:44px 0 72px;}
.article-grid{display:grid;grid-template-columns:minmax(0,1fr) 340px;gap:36px;align-items:start;}
.article-main{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:38px 42px;box-shadow:var(--shadow-1);
  min-width:0;
}
.article-body{font-size:17px;line-height:1.85;color:var(--ink-600);overflow-wrap:break-word;}
.article-body > *:first-child{margin-top:0;}
.article-body p{margin:0 0 18px;}
.article-body h2{
  position:relative;
  font-size:24px;line-height:1.42;font-weight:700;color:var(--ink-900);
  margin:40px 0 14px;padding-left:14px;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:7px;bottom:7px;width:4px;border-radius:2px;background:var(--brand);
}
.article-body h3{font-size:19px;font-weight:600;color:var(--ink-900);margin:28px 0 12px;line-height:1.5;}
.article-body h4{font-size:17px;font-weight:600;color:var(--ink-800);margin:22px 0 10px;}
.article-body a{color:var(--brand-700);text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px;}
.article-body a:hover{color:var(--brand-dark);text-decoration-thickness:2px;}
.article-body ul,.article-body ol{margin:0 0 18px;padding-left:22px;}
.article-body ul{list-style:disc;}
.article-body ol{list-style:decimal;}
.article-body li{margin-bottom:8px;line-height:1.8;}
.article-body ul li::marker{color:var(--brand);}
.article-body ol li::marker{color:var(--brand);font-weight:600;}
.article-body blockquote{
  margin:24px 0;padding:18px 22px;
  background:var(--brand-50);border-left:3px solid var(--brand);
  border-radius:0 12px 12px 0;color:var(--ink-700);
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body img{border-radius:14px;margin:24px auto;max-width:100%;height:auto;background:#E8EEF7;}
.article-body figure{margin:24px 0;}
.article-body figcaption{font-size:13px;color:var(--ink-400);text-align:center;margin-top:10px;}
.article-body code{
  background:#EFF3F9;color:#B0325A;
  padding:2px 6px;border-radius:6px;
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.92em;
}
.article-body pre{
  background:#F2F5FA;border:1px solid var(--line);
  border-radius:14px;padding:18px 20px;overflow-x:auto;margin:0 0 20px;
}
.article-body pre code{background:none;color:var(--ink-700);padding:0;font-size:14px;line-height:1.7;}
.article-body table{width:100%;border-collapse:collapse;margin:0 0 22px;font-size:15px;}
.article-body th,.article-body td{border:1px solid var(--line);padding:10px 14px;text-align:left;}
.article-body th{background:#F7F9FD;color:var(--ink-800);font-weight:600;}
.article-body hr{border:none;border-top:1px solid var(--line);margin:32px 0;}

/* ---------- 标签 ---------- */
.tag-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-top:34px;padding-top:26px;border-top:1px solid var(--line);}
.tag-row .label{font-size:13px;color:var(--ink-400);font-weight:600;}
.tag-link{
  display:inline-flex;align-items:center;height:32px;padding:0 14px;
  border-radius:999px;background:#F4F7FC;border:1px solid var(--line);
  font-size:13px;font-weight:500;color:var(--ink-600);
  transition:background .2s ease,color .2s ease,border-color .2s ease;
}
.tag-link:hover{background:var(--brand-50);border-color:#C9DBFA;color:var(--brand-700);}
.tag-link:focus-visible{outline:2px solid var(--brand);outline-offset:2px;}

/* ---------- 侧栏 ---------- */
.side-stack{display:flex;flex-direction:column;gap:20px;position:sticky;top:108px;}
.side-card{
  background:#fff;border:1px solid var(--line);border-radius:18px;
  padding:20px;box-shadow:var(--shadow-1);
}
.side-title{
  display:flex;align-items:center;gap:8px;
  font-size:15px;font-weight:700;color:var(--ink-900);margin-bottom:14px;
}
.side-title::before{content:"";width:3px;height:14px;border-radius:2px;background:var(--brand);}
.toc-list{display:flex;flex-direction:column;gap:2px;}
.toc-link{
  display:block;font-size:14px;line-height:1.55;color:var(--ink-600);
  padding:8px 12px;border-radius:8px;border-left:2px solid transparent;
  transition:background .2s ease,color .2s ease,border-color .2s ease;
}
.toc-link:hover{background:var(--brand-50);color:var(--brand-700);}
.toc-link:focus-visible{outline:2px solid var(--brand);outline-offset:2px;}
.toc-link.active{background:var(--brand-50);color:var(--brand-700);border-left-color:var(--brand);font-weight:600;}
.toc-link.toc-sub{padding-left:24px;font-size:13px;}
.side-list{display:flex;flex-direction:column;}
.side-item{
  display:flex;gap:12px;padding:12px 0;border-bottom:1px solid var(--line);
  transition:background .2s ease;
}
.side-item:last-child{border-bottom:none;padding-bottom:0;}
.side-item:first-child{padding-top:0;}
.side-item:hover .side-item-title{color:var(--brand-700);}
.side-thumb{width:56px;height:72px;flex:0 0 56px;border-radius:10px;overflow:hidden;background:#E8EEF7;}
.side-thumb img{width:100%;height:100%;object-fit:cover;}
.side-item-title{font-size:14px;font-weight:600;line-height:1.5;color:var(--ink-800);transition:color .2s ease;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.side-item-meta{font-size:12px;color:var(--ink-400);margin-top:6px;}
.side-cta{background:linear-gradient(150deg,var(--brand) 0%,#2C7BE5 100%);border:none;color:#fff;box-shadow:0 16px 32px rgba(27,95,208,.24);}
.side-cta .side-title{color:#fff;}
.side-cta .side-title::before{background:#fff;}
.side-cta p{font-size:14px;line-height:1.7;color:rgba(255,255,255,.86);margin-bottom:16px;}
.side-cta .btn{background:#fff;color:var(--brand-700);}
.side-cta .btn:hover{background:#EAF1FF;}

/* ---------- 移动端目录 ---------- */
.toc-mobile{display:none;margin-bottom:22px;border:1px solid var(--line);border-radius:14px;background:#F8FAFD;overflow:hidden;}
.toc-mobile summary{
  list-style:none;cursor:pointer;padding:14px 18px;font-size:14px;font-weight:600;color:var(--ink-800);
  display:flex;align-items:center;justify-content:space-between;
}
.toc-mobile summary::-webkit-details-marker{display:none;}
.toc-mobile summary::after{content:"+";font-size:18px;color:var(--brand);line-height:1;}
.toc-mobile[open] summary::after{content:"–";}
.toc-mobile .toc-list{padding:0 12px 14px;}

/* ---------- 空状态 ---------- */
.empty-state{
  display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;
  min-height:320px;gap:14px;padding:36px 20px;
}
.empty-state svg{width:44px;height:44px;color:#C6D0DE;}
.empty-state h2{font-size:18px;font-weight:700;color:var(--ink-900);}
.empty-state p{font-size:14px;color:var(--ink-400);max-width:420px;}

/* ---------- 相关阅读 ---------- */
.rel-section{padding:0 0 72px;}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:24px;}
.section-head h2{font-size:clamp(20px,2.4vw,26px);font-weight:700;color:var(--ink-900);letter-spacing:-.2px;}
.section-head p{font-size:14px;color:var(--ink-400);margin-top:6px;}
.text-link{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--brand-700);transition:color .2s ease;}
.text-link i{font-size:12px;transition:transform .2s ease;}
.text-link:hover{color:var(--brand-dark);}
.text-link:hover i{transform:translateX(3px);}
.text-link:focus-visible{outline:2px solid var(--brand);outline-offset:3px;border-radius:6px;}
.rel-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;}
.rel-card{
  display:flex;gap:14px;align-items:flex-start;
  background:#fff;border:1px solid var(--line);border-radius:16px;padding:14px;
  box-shadow:var(--shadow-1);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.rel-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:#D7E3F8;}
.rel-card:focus-visible{outline:2px solid var(--brand);outline-offset:2px;}
.rel-cover{width:92px;height:92px;flex:0 0 92px;border-radius:12px;overflow:hidden;background:#E8EEF7;}
.rel-cover img{width:100%;height:100%;object-fit:cover;}
.rel-body{min-width:0;}
.rel-body h3{
  font-size:15px;font-weight:600;line-height:1.5;color:var(--ink-900);margin:8px 0 6px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.rel-body .rel-meta{font-size:12px;color:var(--ink-400);}

/* ---------- CTA ---------- */
.cta-band{
  background:linear-gradient(120deg,#123A82 0%,var(--brand) 52%,#2C7BE5 100%);
  border-radius:24px;padding:44px 46px;
  display:flex;align-items:center;justify-content:space-between;gap:28px;
  color:#fff;margin-bottom:80px;
  position:relative;overflow:hidden;
}
.cta-band::after{
  content:"";position:absolute;right:-60px;top:-80px;width:280px;height:280px;border-radius:50%;
  background:rgba(255,255,255,.08);
}
.cta-band h2{font-size:clamp(20px,2.4vw,26px);font-weight:700;letter-spacing:-.2px;}
.cta-band p{font-size:15px;line-height:1.7;color:rgba(255,255,255,.84);margin-top:10px;max-width:640px;}
.cta-band .btn{background:#fff;color:var(--brand-700);flex:0 0 auto;position:relative;z-index:1;}
.cta-band .btn:hover{background:#EAF1FF;transform:translateY(-1px);}

/* ---------- 页脚 ---------- */
.site-footer{background:#EDF1F7;border-top:1px solid var(--line);padding:56px 0 26px;}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:36px;}
.footer-text{font-size:14px;line-height:1.8;color:var(--ink-600);margin-top:16px;max-width:340px;}
.footer-title{font-size:14px;font-weight:700;color:var(--ink-900);margin-bottom:14px;}
.footer-link{
  display:block;font-size:14px;color:var(--ink-600);padding:6px 0;
  transition:color .2s ease,transform .2s ease;
}
.footer-link:hover{color:var(--brand-700);transform:translateX(2px);}
.footer-link:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px;}
.footer-info{font-size:13px;line-height:1.8;color:var(--ink-400);margin-bottom:10px;}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  border-top:1px solid #DCE4EF;margin-top:36px;padding-top:20px;
  font-size:13px;color:var(--ink-400);
}

/* ---------- 移动端底部条 ---------- */
.mobile-bar{display:none;}

/* ---------- 响应式 ---------- */
@media (max-width:1199px){
  .article-grid{grid-template-columns:minmax(0,1fr) 300px;gap:28px;}
  .article-main{padding:32px 30px;}
}
@media (max-width:1023px){
  .nav-links,.nav-cta{display:none;}
  .nav-toggle{display:inline-flex;}
  body.nav-open .nav-drawer{display:block;}
  .article-grid{grid-template-columns:minmax(0,1fr);}
  .side-stack{position:static;top:auto;}
  .side-aside{order:2;}
  .toc-card-desktop{display:none;}
  .toc-mobile{display:block;}
  .rel-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px;}
  .cta-band{padding:36px 32px;flex-direction:column;align-items:flex-start;}
  .cta-band .btn{width:100%;}
}
@media (max-width:767px){
  .shell{padding:0 16px;}
  .logo-text{font-size:16px;}
  .page-head{padding-bottom:24px;}
  .breadcrumb{padding-top:16px;}
  .article-head{padding-top:14px;}
  .article-title{margin:14px 0 14px;}
  .article-section{padding:28px 0 52px;}
  .article-main{padding:24px 20px;border-radius:18px;}
  .article-body{font-size:16px;line-height:1.82;}
  .article-body h2{font-size:21px;margin-top:32px;}
  .article-body h3{font-size:18px;}
  .rel-grid{grid-template-columns:minmax(0,1fr);}
  .rel-section{padding-bottom:52px;}
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:24px;}
  .site-footer{padding:44px 0 100px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px;}
  .cta-band{padding:30px 22px;border-radius:20px;margin-bottom:56px;}
  .mobile-bar{
    display:flex;align-items:center;gap:12px;
    position:fixed;left:0;right:0;bottom:0;z-index:70;
    background:#fff;border-top:1px solid var(--line);
    padding:10px 16px calc(10px + env(safe-area-inset-bottom));
    box-shadow:0 -6px 18px rgba(15,30,51,.08);
  }
  .mobile-bar .btn{flex:1;}
}
@media (max-width:520px){
  .nav-card{padding:8px 10px;gap:10px;}
  .article-main{padding:20px 16px;}
  .meta-row{font-size:12px;}
  .section-head{flex-direction:column;align-items:flex-start;gap:8px;}
}

/* roulang page: category1 */
:root{
    --brand:#1B5FD0;
    --brand-dark:#1548A6;
    --brand-50:#EEF4FF;
    --accent:#FF7A3D;
    --accent-soft:#FFF1E9;
    --accent-ink:#C2410C;
    --teal:#0E9F8A;
    --teal-soft:#E6F7F4;
    --ink-900:#0E1726;
    --ink-800:#1B2740;
    --ink-700:#2A3A52;
    --ink-600:#45566E;
    --ink-400:#7A8AA0;
    --ink-300:#A9B6C7;
    --bg:#F5F7FA;
    --bg-deep:#EDF1F7;
    --surface:#FFFFFF;
    --line:#E3E9F2;
    --r-sm:12px;
    --r-md:16px;
    --r-lg:20px;
    --r-xl:24px;
    --shadow-1:0 6px 18px rgba(15,30,51,.06);
    --shadow-2:0 14px 34px rgba(15,30,51,.12);
    --font:-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  }

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

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

  body{
    margin:0;
    font-family:var(--font);
    font-size:16px;
    line-height:1.75;
    color:var(--ink-600);
    background:var(--bg);
    -webkit-font-smoothing:antialiased;
    text-rendering:optimizeLegibility;
  }

  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;}

  h1,h2,h3,h4,p,dl,dd,ol,ul,figure{margin:0;padding:0;}

  ul,ol{list-style:none;}

  :focus-visible{
    outline:2px solid var(--brand);
    outline-offset:2px;
    border-radius:6px;
  }

  .shell{
    width:100%;
    max-width:1280px;
    margin:0 auto;
    padding:0 24px;
  }

  .section{margin-top:56px;}
  .section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:18px;margin-bottom:26px;}
  .section-title{
    font-size:clamp(21px,2.2vw,28px);
    font-weight:700;
    color:var(--ink-900);
    letter-spacing:-.3px;
    line-height:1.35;
  }
  .section-sub{
    margin-top:8px;
    font-size:14px;
    color:var(--ink-400);
    max-width:620px;
  }
  .link-arrow{
    display:inline-flex;
    align-items:center;
    gap:6px;
    font-size:14px;
    font-weight:600;
    color:var(--brand);
    white-space:nowrap;
    transition:color .2s ease;
  }
  .link-arrow svg{transition:transform .2s ease;}
  .link-arrow:hover{color:var(--brand-dark);}
  .link-arrow:hover svg{transform:translateX(3px);}

  /* ---------- Header ---------- */
  .site-header{
    position:sticky;
    top:0;
    z-index:80;
    background:#fff;
    border-bottom:1px solid var(--line);
    transition:box-shadow .2s ease;
  }
  .site-header.is-scrolled{box-shadow:0 8px 24px rgba(15,30,51,.08);}
  .header-inner{padding-top:10px;padding-bottom:10px;}

  .nav-panel{
    position:relative;
    display:flex;
    align-items:center;
    gap:16px;
    background:#fff;
    border:1px solid var(--line);
    border-radius:var(--r-lg);
    padding:10px 12px;
    box-shadow:var(--shadow-1);
  }

  .brand{display:flex;align-items:center;gap:10px;flex:none;}
  .logo-mark{
    width:38px;height:38px;
    border-radius:12px;
    background:var(--brand);
    color:#fff;
    display:grid;place-items:center;
    font-size:18px;font-weight:800;
    letter-spacing:0;
    box-shadow:0 4px 12px rgba(27,95,208,.28);
  }
  .logo-text{
    font-size:18px;
    font-weight:700;
    letter-spacing:-.2px;
    color:var(--ink-900);
    white-space:nowrap;
  }

  .nav-links{
    display:flex;
    align-items:center;
    gap:8px;
    margin-left:auto;
  }
  .nav-chip{
    position:relative;
    display:inline-flex;
    align-items:center;
    height:40px;
    padding:0 14px;
    border-radius:var(--r-sm);
    background:var(--brand-50);
    border:1px solid transparent;
    color:var(--ink-700);
    font-size:14px;
    font-weight:600;
    white-space:nowrap;
    transition:background .2s ease,color .2s ease,border-color .2s ease,transform .2s ease;
  }
  .nav-chip:hover{
    background:#fff;
    border-color:var(--brand);
    color:var(--brand-dark);
    transform:translateY(-1px);
  }
  .nav-chip.active{
    background:#fff;
    border-color:var(--brand-50);
    color:var(--brand-dark);
    padding-left:17px;
    box-shadow:inset 0 0 0 1px rgba(27,95,208,.06);
  }
  .nav-chip.active::before{
    content:"";
    position:absolute;
    left:0;top:10px;bottom:10px;
    width:3px;
    border-radius:3px;
    background:var(--brand);
  }

  .nav-cta{display:flex;align-items:center;gap:10px;flex:none;margin-left:6px;}

  .btn{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    gap:8px;
    height:48px;
    padding:0 24px;
    border-radius:var(--r-sm);
    font-size:15px;
    font-weight:600;
    border:1px solid transparent;
    transition:background .2s ease,color .2s ease,border-color .2s ease,box-shadow .2s ease,transform .2s ease;
  }
  .btn-primary{
    background:var(--brand);
    color:#fff;
    box-shadow:0 6px 16px rgba(27,95,208,.24);
  }
  .btn-primary:hover{
    background:var(--brand-dark);
    box-shadow:0 12px 26px rgba(21,72,166,.28);
    transform:translateY(-1px);
  }
  .btn-primary:active{transform:translateY(0);box-shadow:0 4px 10px rgba(21,72,166,.2);}
  .btn-ghost{
    background:#fff;
    border-color:var(--line);
    color:var(--ink-800);
  }
  .btn-ghost:hover{border-color:var(--brand);color:var(--brand-dark);transform:translateY(-1px);}
  .btn-ghost:active{transform:translateY(0);}
  .btn-sm{height:40px;padding:0 18px;font-size:14px;}
  .btn-light{
    background:#fff;
    color:var(--brand-dark);
    box-shadow:0 8px 20px rgba(0,0,0,.14);
  }
  .btn-light:hover{transform:translateY(-1px);box-shadow:0 14px 30px rgba(0,0,0,.18);}
  .btn-outline-light{
    background:rgba(255,255,255,.08);
    border-color:rgba(255,255,255,.42);
    color:#fff;
  }
  .btn-outline-light:hover{background:rgba(255,255,255,.18);transform:translateY(-1px);}

  .nav-toggle{
    display:none;
    width:40px;height:40px;
    border-radius:var(--r-sm);
    border:1px solid var(--line);
    background:#fff;
    place-items:center;
    color:var(--ink-700);
    transition:border-color .2s ease,color .2s ease,background .2s ease;
  }
  .nav-toggle:hover{border-color:var(--brand);color:var(--brand-dark);background:var(--brand-50);}
  .nav-toggle svg{pointer-events:none;}
  .nav-toggle .icon-close{display:none;}
  .site-header.is-open .nav-toggle .icon-close{display:block;}
  .site-header.is-open .nav-toggle .icon-menu{display:none;}

  /* ---------- Breadcrumb ---------- */
  .breadcrumb{padding-top:22px;}
  .breadcrumb-list{
    display:flex;
    flex-wrap:wrap;
    align-items:center;
    gap:8px;
    font-size:13px;
    color:var(--ink-400);
  }
  .breadcrumb-list a{transition:color .2s ease;}
  .breadcrumb-list a:hover{color:var(--brand);}
  .breadcrumb-sep{color:var(--ink-300);}
  .breadcrumb-current{color:var(--ink-700);font-weight:600;}

  /* ---------- Page hero ---------- */
  .page-hero{margin-top:18px;}
  .hero-card{
    position:relative;
    overflow:hidden;
    background:#fff;
    border:1px solid var(--line);
    border-radius:var(--r-xl);
    padding:34px 34px 30px;
    box-shadow:var(--shadow-1);
  }
  .hero-card::after{
    content:"";
    position:absolute;
    right:-120px;top:-120px;
    width:320px;height:320px;
    border-radius:50%;
    background:radial-gradient(circle at center,rgba(27,95,208,.10),rgba(27,95,208,0) 70%);
    pointer-events:none;
  }
  .hero-badge{
    display:inline-flex;
    align-items:center;
    gap:8px;
    height:28px;
    padding:0 12px;
    border-radius:999px;
    background:var(--teal-soft);
    color:#0B7A6B;
    font-size:12px;
    font-weight:600;
    letter-spacing:.2px;
  }
  .hero-badge .dot{width:6px;height:6px;border-radius:50%;background:var(--teal);}
  .page-title{
    margin-top:16px;
    font-size:clamp(26px,3.2vw,40px);
    line-height:1.28;
    font-weight:800;
    letter-spacing:-.4px;
    color:var(--ink-900);
    max-width:820px;
  }
  .page-lead{
    margin-top:14px;
    max-width:760px;
    font-size:16px;
    line-height:1.8;
    color:var(--ink-600);
  }
  .chip-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px;}
  .chip{
    display:inline-flex;
    align-items:center;
    height:32px;
    padding:0 14px;
    border-radius:999px;
    background:var(--brand-50);
    border:1px solid rgba(27,95,208,.14);
    color:var(--brand-dark);
    font-size:13px;
    font-weight:600;
  }
  .chip.neutral{
    background:#F3F6FB;
    border-color:var(--line);
    color:var(--ink-700);
  }
  .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px;}

  /* ---------- Spec split ---------- */
  .spec-grid{
    display:grid;
    grid-template-columns:minmax(0,1.55fr) minmax(0,1fr);
    gap:24px;
    align-items:stretch;
  }
  .media-frame{
    position:relative;
    overflow:hidden;
    border-radius:var(--r-lg);
    background:var(--bg-deep);
    border:1px solid var(--line);
    box-shadow:var(--shadow-1);
  }
  .media-frame img{
    width:100%;
    height:100%;
    aspect-ratio:16/9;
    object-fit:cover;
  }
  .media-caption{
    position:absolute;
    left:0;right:0;bottom:0;
    padding:44px 22px 18px;
    background:linear-gradient(to top,rgba(11,23,40,.82),rgba(11,23,40,0));
    color:#fff;
    font-size:14px;
    line-height:1.6;
  }
  .spec-card{
    background:#fff;
    border:1px solid var(--line);
    border-radius:var(--r-lg);
    padding:24px;
    box-shadow:var(--shadow-1);
    display:flex;
    flex-direction:column;
  }
  .spec-card h2{
    font-size:18px;
    font-weight:700;
    color:var(--ink-900);
    letter-spacing:-.2px;
  }
  .spec-list{margin-top:6px;}
  .spec-row{
    display:flex;
    align-items:flex-start;
    justify-content:space-between;
    gap:18px;
    padding:14px 0;
    border-bottom:1px solid var(--line);
  }
  .spec-row:last-child{border-bottom:0;padding-bottom:2px;}
  .spec-key{font-size:13px;color:var(--ink-400);flex:none;padding-top:2px;}
  .spec-val{font-size:14px;font-weight:600;color:var(--ink-800);text-align:right;line-height:1.6;}
  .spec-note{
    margin-top:auto;
    padding-top:16px;
    font-size:13px;
    color:var(--ink-400);
  }

  /* ---------- Media cards ---------- */
  .media-grid{
    display:grid;
    grid-template-columns:repeat(2,minmax(0,1fr));
    gap:20px;
  }
  .media-card{
    display:grid;
    grid-template-columns:180px minmax(0,1fr);
    gap:18px;
    background:#fff;
    border:1px solid var(--line);
    border-radius:var(--r-md);
    padding:14px;
    box-shadow:var(--shadow-1);
    transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
  }
  .media-card:hover{
    transform:translateY(-4px);
    box-shadow:var(--shadow-2);
    border-color:rgba(27,95,208,.22);
  }
  .media-card .thumb{
    overflow:hidden;
    border-radius:var(--r-sm);
    background:var(--bg-deep);
    aspect-ratio:4/3;
  }
  .media-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease;}
  .media-card:hover .thumb img{transform:scale(1.05);}
  .media-card .body{display:flex;flex-direction:column;min-width:0;}
  .badge{
    display:inline-flex;
    align-items:center;
    height:22px;
    padding:0 8px;
    border-radius:6px;
    font-size:12px;
    font-weight:600;
    background:var(--brand-50);
    color:var(--brand-dark);
    width:max-content;
  }
  .badge.accent{background:var(--accent-soft);color:var(--accent-ink);}
  .badge.teal{background:var(--teal-soft);color:#0B7A6B;}
  .card-title{
    margin-top:10px;
    font-size:16px;
    font-weight:700;
    line-height:1.45;
    color:var(--ink-900);
    letter-spacing:-.1px;
  }
  .card-text{
    margin-top:8px;
    font-size:14px;
    line-height:1.72;
    color:var(--ink-600);
    display:-webkit-box;
    -webkit-line-clamp:3;
    -webkit-box-orient:vertical;
    overflow:hidden;
  }
  .card-foot{
    margin-top:auto;
    padding-top:12px;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:10px;
    font-size:13px;
    color:var(--ink-400);
  }

  /* ---------- Steps ---------- */
  .steps{
    display:grid;
    grid-template-columns:repeat(4,minmax(0,1fr));
    gap:18px;
  }
  .step{
    position:relative;
    background:#fff;
    border:1px solid var(--line);
    border-radius:var(--r-md);
    padding:22px 20px;
    box-shadow:var(--shadow-1);
    transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
  }
  .step:hover{transform:translateY(-3px);box-shadow:var(--shadow-2);border-color:rgba(27,95,208,.22);}
  .step::after{
    content:"";
    position:absolute;
    left:66px;right:-18px;top:38px;
    border-top:1px dashed #C9D6E8;
  }
  .step:last-child::after{display:none;}
  .step-dot{
    width:32px;height:32px;
    border-radius:50%;
    background:var(--brand);
    color:#fff;
    display:grid;place-items:center;
    font-size:14px;
    font-weight:700;
    box-shadow:0 6px 14px rgba(27,95,208,.26);
  }
  .step h3{
    margin-top:14px;
    font-size:15px;
    font-weight:700;
    color:var(--ink-900);
  }
  .step p{
    margin-top:8px;
    font-size:13.5px;
    line-height:1.7;
    color:var(--ink-600);
  }

  /* ---------- FAQ ---------- */
  .faq-wrap{
    display:grid;
    grid-template-columns:minmax(0,1fr) minmax(0,1.7fr);
    gap:32px;
    align-items:start;
  }
  .faq-aside{
    position:sticky;
    top:104px;
    background:#fff;
    border:1px solid var(--line);
    border-radius:var(--r-lg);
    padding:26px;
    box-shadow:var(--shadow-1);
  }
  .faq-aside h2{
    font-size:22px;
    font-weight:700;
    color:var(--ink-900);
    letter-spacing:-.3px;
    line-height:1.4;
  }
  .faq-aside p{
    margin-top:12px;
    font-size:14px;
    line-height:1.8;
    color:var(--ink-600);
  }
  .faq-aside .aside-list{margin-top:18px;border-top:1px solid var(--line);padding-top:6px;}
  .faq-aside .aside-list li{
    padding:12px 0;
    border-bottom:1px solid var(--line);
    font-size:13.5px;
    color:var(--ink-700);
  }
  .faq-aside .aside-list li:last-child{border-bottom:0;}
  .faq-list{display:flex;flex-direction:column;gap:12px;}
  .faq-item{
    background:#fff;
    border:1px solid var(--line);
    border-radius:var(--r-md);
    box-shadow:var(--shadow-1);
    overflow:hidden;
    transition:border-color .2s ease,box-shadow .2s ease;
  }
  .faq-item:hover{border-color:rgba(27,95,208,.24);}
  .faq-item[open]{border-color:rgba(27,95,208,.3);box-shadow:var(--shadow-2);}
  .faq-item summary{
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:16px;
    min-height:56px;
    padding:16px 20px;
    font-size:16px;
    font-weight:600;
    color:var(--ink-900);
    cursor:pointer;
    list-style:none;
  }
  .faq-item summary::-webkit-details-marker{display:none;}
  .faq-item summary::after{
    content:"+";
    flex:none;
    width:26px;height:26px;
    display:grid;place-items:center;
    border-radius:50%;
    background:var(--brand-50);
    color:var(--brand);
    font-size:17px;
    font-weight:700;
    line-height:1;
    transition:background .2s ease,color .2s ease;
  }
  .faq-item[open] summary::after{content:"−";background:var(--brand);color:#fff;}
  .faq-body{
    padding:0 20px 20px;
    font-size:15px;
    line-height:1.85;
    color:var(--ink-600);
    border-top:1px solid var(--line);
    padding-top:16px;
  }

  /* ---------- CTA band ---------- */
  .cta-band{
    position:relative;
    overflow:hidden;
    border-radius:var(--r-xl);
    background:linear-gradient(120deg,#1548A6 0%,#1B5FD0 62%,#2A6FDF 100%);
    color:#fff;
    padding:38px 40px;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:26px;
    box-shadow:0 18px 40px rgba(21,72,166,.24);
  }
  .cta-band::after{
    content:"";
    position:absolute;
    right:-80px;bottom:-140px;
    width:320px;height:320px;
    border-radius:50%;
    background:radial-gradient(circle at center,rgba(255,255,255,.16),rgba(255,255,255,0) 70%);
  }
  .cta-band h2{
    font-size:clamp(21px,2.4vw,28px);
    font-weight:800;
    letter-spacing:-.3px;
    line-height:1.35;
  }
  .cta-band p{
    margin-top:10px;
    font-size:14.5px;
    line-height:1.75;
    color:rgba(255,255,255,.86);
    max-width:620px;
  }
  .cta-actions{display:flex;flex-wrap:wrap;gap:12px;flex:none;}

  /* ---------- Footer ---------- */
  .site-footer{
    margin-top:72px;
    background:var(--bg-deep);
    border-top:1px solid var(--line);
    padding:52px 0 28px;
  }
  .footer-grid{
    display:grid;
    grid-template-columns:minmax(0,1.6fr) repeat(3,minmax(0,1fr));
    gap:32px;
  }
  .site-footer .logo{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
  .footer-text{
    font-size:13.5px;
    line-height:1.85;
    color:var(--ink-600);
    max-width:360px;
  }
  .footer-title{
    font-size:14px;
    font-weight:700;
    color:var(--ink-900);
    margin-bottom:14px;
    letter-spacing:.2px;
  }
  .footer-link{
    display:block;
    padding:6px 0;
    font-size:13.5px;
    color:var(--ink-600);
    transition:color .2s ease,transform .2s ease;
  }
  .footer-link:hover{color:var(--brand);transform:translateX(2px);}
  .footer-info{
    font-size:13px;
    line-height:1.8;
    color:var(--ink-400);
    margin-bottom:10px;
  }
  .footer-bottom{
    margin-top:34px;
    padding-top:18px;
    border-top:1px solid #DCE3EE;
    display:flex;
    flex-wrap:wrap;
    gap:10px 24px;
    justify-content:space-between;
    font-size:13px;
    color:var(--ink-400);
  }

  /* ---------- Mobile bar ---------- */
  .mobile-bar{
    display:none;
    position:fixed;
    left:0;right:0;bottom:0;
    z-index:70;
    padding:10px 16px calc(10px + env(safe-area-inset-bottom));
    background:rgba(255,255,255,.96);
    border-top:1px solid var(--line);
    box-shadow:0 -6px 20px rgba(15,30,51,.08);
  }
  .mobile-bar .btn{width:100%;height:48px;}

  /* ---------- Responsive ---------- */
  @media (min-width:1024px){
    .section{margin-top:76px;}
  }

  @media (max-width:1023px){
    .nav-links{
      display:none;
      position:absolute;
      left:-1px;right:-1px;
      top:calc(100% + 10px);
      flex-direction:column;
      align-items:stretch;
      gap:6px;
      margin-left:0;
      padding:10px;
      background:#fff;
      border:1px solid var(--line);
      border-radius:var(--r-lg);
      box-shadow:var(--shadow-2);
    }
    .site-header.is-open .nav-links{display:flex;}
    .nav-chip{height:48px;justify-content:flex-start;padding:0 14px;}
    .nav-chip.active{padding-left:17px;}
    .nav-cta .btn-sm{display:none;}
    .nav-toggle{display:inline-grid;margin-left:0;}
    .nav-cta{margin-left:auto;}
    .spec-grid{grid-template-columns:1fr;}
    .media-grid{grid-template-columns:1fr;}
    .steps{grid-template-columns:repeat(2,minmax(0,1fr));}
    .step::after{display:none;}
    .faq-wrap{grid-template-columns:1fr;}
    .faq-aside{position:static;}
    .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
    .cta-band{flex-direction:column;align-items:flex-start;padding:32px;}
  }

  @media (max-width:767px){
    .shell{padding:0 16px;}
    .page-hero{margin-top:14px;}
    .hero-card{padding:24px 20px 22px;border-radius:var(--r-lg);}
    .header-inner{padding-top:8px;padding-bottom:8px;}
    .nav-panel{padding:8px 10px;border-radius:16px;}
    .logo-mark{width:34px;height:34px;font-size:16px;}
    .logo-text{font-size:16px;}
    .media-card{grid-template-columns:1fr;padding:12px;}
    .media-card .thumb{aspect-ratio:16/9;}
    .steps{grid-template-columns:1fr;}
    .section{margin-top:48px;}
    .section-head{flex-direction:column;align-items:flex-start;gap:8px;}
    .cta-band{padding:26px 20px;border-radius:var(--r-lg);}
    .cta-actions{width:100%;}
    .cta-actions .btn{flex:1 1 auto;}
    .site-footer{padding-bottom:96px;}
    .mobile-bar{display:block;}
    .footer-grid{grid-template-columns:1fr;gap:24px;}
    .footer-bottom{flex-direction:column;gap:6px;}
    .spec-val{text-align:left;}
    .spec-row{flex-direction:column;gap:4px;}
  }

  @media (max-width:520px){
    .page-title{font-size:24px;}
    .hero-actions .btn{width:100%;}
    .chip{font-size:12.5px;padding:0 12px;}
  }

  @media (prefers-reduced-motion:reduce){
    *{transition:none !important;animation:none !important;}
    html{scroll-behavior:auto;}
  }

/* roulang page: category2 */
:root{
    --brand:#1B5FD0;
    --brand-dark:#1548A6;
    --brand-50:#EEF4FF;
    --brand-100:#DCE8FF;
    --accent:#FF7A3D;
    --accent-50:#FFF1E9;
    --teal:#0E9F8A;
    --teal-50:#E7F7F4;
    --ink-900:#0E1726;
    --ink-700:#2A3A52;
    --ink-600:#45566E;
    --ink-400:#7A8AA0;
    --ink-300:#A9B6C7;
    --bg:#F5F7FA;
    --surface:#FFFFFF;
    --line:#E3E9F2;
    --r-lg:24px;
    --r-md:20px;
    --r-sm:16px;
    --r-xs:12px;
    --shadow-1:0 6px 18px rgba(15,30,51,.06);
    --shadow-2:0 14px 34px rgba(15,30,51,.12);
    --font:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  }
  *,*::before,*::after{box-sizing:border-box}
  html{scroll-behavior:smooth}
  body{
    margin:0;
    font-family:var(--font);
    font-size:16px;
    line-height:1.8;
    color:var(--ink-600);
    background:var(--bg);
    -webkit-font-smoothing:antialiased;
    text-rendering:optimizeLegibility;
  }
  img{display:block;max-width:100%;height:auto}
  a{color:inherit;text-decoration:none}
  button{font:inherit;border:0;background:none;cursor:pointer;color:inherit}
  ul,ol{margin:0;padding:0;list-style:none}
  h1,h2,h3,h4,p{margin:0}
  :focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px}

  .shell{max-width:1280px;margin:0 auto;padding:0 24px}

  /* ---------- Header ---------- */
  .site-header{
    position:sticky;top:0;z-index:60;
    background:rgba(245,247,250,.94);
    border-bottom:1px solid var(--line);
    padding:12px 0;
  }
  .nav-card{
    position:relative;
    display:flex;align-items:center;gap:18px;
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:var(--r-md);
    padding:10px 12px;
    box-shadow:var(--shadow-1);
  }
  .logo{display:inline-flex;align-items:center;gap:10px;flex-shrink:0}
  .logo-mark{
    width:36px;height:36px;border-radius:12px;
    background:var(--brand);color:#fff;
    display:inline-flex;align-items:center;justify-content:center;
    font-weight:800;font-size:17px;letter-spacing:-.5px;
    box-shadow:0 6px 14px rgba(27,95,208,.28);
  }
  .logo-text{font-size:18px;font-weight:700;color:var(--ink-900);letter-spacing:-.2px;white-space:nowrap}
  .nav-links{display:flex;align-items:center;gap:6px;flex:1;flex-wrap:wrap;justify-content:center}
  .nav-chip{
    position:relative;
    display:inline-flex;align-items:center;gap:6px;
    height:40px;padding:0 14px;border-radius:var(--r-xs);
    background:var(--brand-50);color:var(--ink-700);
    font-size:14px;font-weight:500;
    border:1px solid transparent;
    transition:background .18s ease,color .18s ease,border-color .18s ease,transform .18s ease;
    white-space:nowrap;
  }
  .nav-chip:hover{background:#fff;border-color:var(--brand);color:var(--brand-dark);transform:translateY(-1px)}
  .nav-chip:active{transform:translateY(0)}
  .nav-chip.active{background:#fff;border-color:var(--brand-100);color:var(--brand-dark);font-weight:700}
  .nav-chip.active::before{
    content:"";position:absolute;left:4px;top:50%;transform:translateY(-50%);
    width:3px;height:18px;border-radius:2px;background:var(--brand);
  }
  .nav-cta{display:flex;align-items:center;gap:8px;flex-shrink:0}
  .menu-toggle{
    display:none;width:40px;height:40px;border-radius:12px;
    border:1px solid var(--line);background:#fff;
    align-items:center;justify-content:center;
  }
  .menu-toggle span{display:block;width:16px;height:2px;border-radius:2px;background:var(--ink-700);position:relative}
  .menu-toggle span::before,.menu-toggle span::after{
    content:"";position:absolute;left:0;width:16px;height:2px;border-radius:2px;background:var(--ink-700);
  }
  .menu-toggle span::before{top:-5px}
  .menu-toggle span::after{top:5px}

  /* ---------- Buttons ---------- */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    height:48px;padding:0 24px;border-radius:var(--r-xs);
    font-size:15px;font-weight:600;line-height:1;
    transition:background .18s ease,color .18s ease,border-color .18s ease,box-shadow .18s ease,transform .18s ease;
    border:1px solid transparent;white-space:nowrap;
  }
  .btn-sm{height:40px;padding:0 16px;font-size:14px;border-radius:var(--r-xs)}
  .btn-primary{background:var(--brand);color:#fff;box-shadow:0 8px 20px rgba(27,95,208,.22)}
  .btn-primary:hover{background:var(--brand-dark);box-shadow:0 12px 26px rgba(27,95,208,.3);transform:translateY(-1px)}
  .btn-primary:active{transform:translateY(0);box-shadow:none}
  .btn-ghost{background:#fff;color:var(--ink-900);border-color:var(--line)}
  .btn-ghost:hover{border-color:var(--brand);color:var(--brand-dark);transform:translateY(-1px)}
  .btn-ghost:active{transform:translateY(0)}
  .btn-arrow{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--brand)}
  .btn-arrow svg{transition:transform .18s ease}
  .btn-arrow:hover{color:var(--brand-dark)}
  .btn-arrow:hover svg{transform:translateX(3px)}

  /* ---------- Page hero ---------- */
  .page-hero{
    position:relative;overflow:hidden;
    margin-top:28px;
    border-radius:var(--r-lg);
    background:linear-gradient(115deg,#FFFFFF 0%,#F0F5FF 58%,#E8F0FE 100%);
    border:1px solid var(--line);
  }
  .page-hero-bg{
    position:absolute;inset:0;width:100%;height:100%;
    object-fit:cover;opacity:.16;
  }
  .page-hero-inner{
    position:relative;z-index:2;
    display:grid;grid-template-columns:1.15fr .85fr;gap:40px;align-items:center;
    padding:44px 44px 44px;
  }
  .crumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--ink-400);margin-bottom:18px;flex-wrap:wrap}
  .crumb a{color:var(--ink-400);transition:color .18s ease}
  .crumb a:hover{color:var(--brand)}
  .crumb .sep{color:var(--ink-300)}
  .crumb .current{color:var(--ink-700);font-weight:600}
  .badge{
    display:inline-flex;align-items:center;gap:6px;
    height:24px;padding:0 10px;border-radius:6px;
    font-size:12px;font-weight:600;line-height:1;
  }
  .badge-brand{background:var(--brand-50);color:var(--brand-dark)}
  .badge-teal{background:var(--teal-50);color:#0B7F6E}
  .badge-accent{background:var(--accent-50);color:#C2410C}
  .page-hero h1{
    font-size:clamp(26px,3.2vw,40px);
    line-height:1.28;font-weight:800;color:var(--ink-900);
    letter-spacing:-.3px;margin:16px 0 14px;
  }
  .page-hero .lead{font-size:16px;color:var(--ink-600);max-width:560px}
  .chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:22px}
  .chip{
    display:inline-flex;align-items:center;height:34px;padding:0 14px;
    border-radius:999px;background:#fff;border:1px solid var(--line);
    font-size:13px;font-weight:500;color:var(--ink-700);
    transition:all .18s ease;
  }
  .chip:hover{border-color:var(--brand);color:var(--brand-dark);transform:translateY(-1px)}
  .chip.is-on{background:var(--brand);border-color:var(--brand);color:#fff}
  .page-hero-figure{
    border-radius:var(--r-sm);overflow:hidden;
    border:1px solid rgba(255,255,255,.9);
    box-shadow:0 18px 40px rgba(15,30,51,.14);
    background:var(--brand-50);
  }
  .page-hero-figure img{width:100%;aspect-ratio:16/11;object-fit:cover}

  /* ---------- Doc layout ---------- */
  .doc-section{padding:64px 0 72px}
  .doc-grid{display:grid;grid-template-columns:268px minmax(0,1fr);gap:32px;align-items:start}
  .doc-toc{
    position:sticky;top:104px;
    background:var(--surface);border:1px solid var(--line);
    border-radius:var(--r-md);padding:20px 16px;
    box-shadow:var(--shadow-1);
  }
  .toc-title{font-size:12px;font-weight:700;color:var(--ink-400);letter-spacing:.06em;padding:0 10px 12px}
  .toc-link{
    display:block;position:relative;
    padding:9px 10px 9px 16px;border-radius:10px;
    font-size:14px;color:var(--ink-600);
    transition:background .18s ease,color .18s ease;
  }
  .toc-link::before{
    content:"";position:absolute;left:4px;top:50%;transform:translateY(-50%);
    width:2px;height:0;border-radius:2px;background:var(--brand);
    transition:height .18s ease;
  }
  .toc-link:hover{background:var(--brand-50);color:var(--brand-dark)}
  .toc-link.is-active{background:var(--brand-50);color:var(--brand-dark);font-weight:600}
  .toc-link.is-active::before{height:16px}
  .toc-foot{
    margin-top:16px;padding:14px;border-radius:var(--r-xs);
    background:linear-gradient(140deg,#F3F7FF,#EAF1FF);
    border:1px solid var(--brand-100);
  }
  .toc-foot p{font-size:13px;line-height:1.7;color:var(--ink-600);margin-bottom:10px}
  .toc-foot .btn{width:100%;height:40px;font-size:14px}

  .doc-body{display:flex;flex-direction:column;gap:22px;min-width:0}
  .doc-block{
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:var(--r-md);
    padding:30px 34px;
    box-shadow:var(--shadow-1);
    scroll-margin-top:104px;
    transition:box-shadow .2s ease,border-color .2s ease;
  }
  .doc-block:hover{box-shadow:var(--shadow-2);border-color:#D5E2F8}
  .doc-head{display:flex;align-items:flex-start;gap:14px;margin-bottom:16px}
  .doc-num{
    flex-shrink:0;width:34px;height:34px;border-radius:11px;
    background:var(--brand-50);color:var(--brand-dark);
    font-size:14px;font-weight:800;
    display:flex;align-items:center;justify-content:center;
    margin-top:3px;
  }
  .doc-block h2{
    font-size:22px;line-height:1.4;font-weight:700;color:var(--ink-900);
    letter-spacing:-.2px;
  }
  .doc-block h2 .sub{display:block;font-size:13px;font-weight:500;color:var(--ink-400);margin-top:4px;letter-spacing:0}
  .doc-block > p{font-size:15.5px;line-height:1.9;color:var(--ink-600)}
  .doc-block > p + p{margin-top:12px}

  .point-list{display:flex;flex-direction:column;gap:14px;margin-top:20px}
  .point-list li{display:flex;gap:12px;align-items:flex-start}
  .point-dot{
    flex-shrink:0;width:20px;height:20px;border-radius:6px;margin-top:5px;
    background:var(--brand-50);color:var(--brand);display:flex;align-items:center;justify-content:center;
  }
  .point-dot svg{width:12px;height:12px}
  .point-list strong{display:block;font-size:15px;font-weight:600;color:var(--ink-900);margin-bottom:2px}
  .point-list span{font-size:14.5px;line-height:1.8;color:var(--ink-600)}

  .note{
    margin-top:20px;padding:16px 18px;border-radius:var(--r-xs);
    background:var(--brand-50);border-left:3px solid var(--brand);
    font-size:14px;line-height:1.8;color:var(--ink-700);
  }
  .note b{color:var(--brand-dark)}

  .spec-row{
    display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 28px;
    margin-top:20px;border-top:1px solid var(--line);
  }
  .spec-item{display:flex;justify-content:space-between;gap:16px;padding:12px 0;border-bottom:1px solid var(--line);font-size:14px}
  .spec-item dt{color:var(--ink-400)}
  .spec-item dd{margin:0;color:var(--ink-900);font-weight:600;text-align:right}

  /* ---------- Benefit cards ---------- */
  .benefit-section{padding:0 0 72px}
  .section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:28px;flex-wrap:wrap}
  .section-head h2{font-size:clamp(22px,2.4vw,28px);font-weight:700;color:var(--ink-900);letter-spacing:-.2px}
  .section-head p{font-size:14px;color:var(--ink-400);margin-top:6px}
  .benefit-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
  .benefit-card{
    background:var(--surface);border:1px solid var(--line);border-radius:var(--r-sm);
    padding:24px;box-shadow:var(--shadow-1);
    transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
    display:flex;flex-direction:column;gap:12px;
  }
  .benefit-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:var(--brand-100)}
  .benefit-icon{
    width:42px;height:42px;border-radius:12px;
    background:var(--brand-50);color:var(--brand-dark);
    display:flex;align-items:center;justify-content:center;
  }
  .benefit-card h3{font-size:17px;font-weight:600;color:var(--ink-900);line-height:1.45}
  .benefit-card p{font-size:14px;line-height:1.85;color:var(--ink-600)}
  .benefit-tags{display:flex;flex-wrap:wrap;gap:6px;margin-top:auto;padding-top:6px}

  /* ---------- Preview ---------- */
  .preview-section{padding:0 0 72px}
  .preview-card{
    display:grid;grid-template-columns:1fr 1fr;gap:0;
    background:var(--surface);border:1px solid var(--line);
    border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--shadow-1);
  }
  .preview-media{position:relative;background:var(--brand-50);min-height:320px}
  .preview-media img{width:100%;height:100%;object-fit:cover;position:absolute;inset:0}
  .preview-copy{padding:38px 40px;display:flex;flex-direction:column;justify-content:center;gap:16px}
  .preview-copy h2{font-size:clamp(20px,2.2vw,26px);font-weight:700;color:var(--ink-900);line-height:1.4}
  .preview-copy p{font-size:15px;line-height:1.9;color:var(--ink-600)}
  .mini-list{display:flex;flex-direction:column;gap:10px;margin-top:4px}
  .mini-list li{display:flex;gap:10px;align-items:flex-start;font-size:14px;color:var(--ink-700)}
  .mini-list li::before{
    content:"";flex-shrink:0;width:6px;height:6px;border-radius:50%;
    background:var(--brand);margin-top:9px;
  }
  .preview-copy .btn{align-self:flex-start;margin-top:8px}

  /* ---------- FAQ ---------- */
  .faq-section{padding:0 0 72px}
  .faq-list{display:flex;flex-direction:column;gap:12px}
  .faq-item{
    background:var(--surface);border:1px solid var(--line);
    border-radius:var(--r-sm);overflow:hidden;
    transition:border-color .2s ease,box-shadow .2s ease;
  }
  .faq-item:hover{border-color:var(--brand-100);box-shadow:var(--shadow-1)}
  .faq-item summary{
    list-style:none;cursor:pointer;
    display:flex;align-items:center;justify-content:space-between;gap:16px;
    padding:18px 22px;font-size:16px;font-weight:600;color:var(--ink-900);
    line-height:1.5;
  }
  .faq-item summary::-webkit-details-marker{display:none}
  .faq-sign{
    flex-shrink:0;width:24px;height:24px;border-radius:8px;
    background:var(--brand-50);color:var(--brand);
    display:flex;align-items:center;justify-content:center;
    font-size:16px;font-weight:700;line-height:1;
    transition:background .2s ease,color .2s ease,transform .2s ease;
  }
  .faq-item[open] .faq-sign{background:var(--brand);color:#fff;transform:rotate(45deg)}
  .faq-answer{padding:0 22px 20px;font-size:15px;line-height:1.9;color:var(--ink-600)}
  .faq-answer p + p{margin-top:10px}

  /* ---------- CTA ---------- */
  .cta-section{padding:0 0 80px}
  .cta-band{
    display:flex;align-items:center;justify-content:space-between;gap:28px;
    background:linear-gradient(120deg,#1548A6 0%,#1B5FD0 62%,#2A72E8 100%);
    border-radius:var(--r-lg);
    padding:40px 44px;color:#fff;position:relative;overflow:hidden;
  }
  .cta-band::after{
    content:"";position:absolute;right:-60px;top:-70px;
    width:280px;height:280px;border-radius:50%;
    background:rgba(255,255,255,.09);
  }
  .cta-band h2{font-size:clamp(20px,2.3vw,27px);font-weight:700;letter-spacing:-.2px;line-height:1.4}
  .cta-band p{font-size:14.5px;color:rgba(255,255,255,.82);margin-top:8px;max-width:620px}
  .cta-actions{display:flex;gap:12px;flex-shrink:0;flex-wrap:wrap}
  .cta-band .btn-ghost{background:rgba(255,255,255,.14);border-color:rgba(255,255,255,.4);color:#fff}
  .cta-band .btn-ghost:hover{background:#fff;color:var(--brand-dark);border-color:#fff}
  .cta-band .btn-primary{background:#fff;color:var(--brand-dark);box-shadow:0 10px 24px rgba(3,20,50,.22)}
  .cta-band .btn-primary:hover{background:#F2F7FF;color:var(--brand-dark)}

  /* ---------- Footer ---------- */
  .site-footer{background:#EDF1F7;border-top:1px solid var(--line);padding:56px 0 28px;margin-top:0}
  .footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:36px}
  .footer-text{font-size:13.5px;line-height:1.9;color:var(--ink-600);margin-top:14px;max-width:360px}
  .footer-title{font-size:13px;font-weight:700;color:var(--ink-900);margin-bottom:14px;letter-spacing:.02em}
  .footer-link{display:block;font-size:13.5px;color:var(--ink-600);padding:6px 0;transition:color .18s ease,transform .18s ease}
  .footer-link:hover{color:var(--brand);transform:translateX(2px)}
  .footer-info{font-size:13px;line-height:1.85;color:var(--ink-600);margin-bottom:8px}
  .footer-bottom{
    display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
    margin-top:36px;padding-top:20px;border-top:1px solid #DCE4EF;
    font-size:13px;color:var(--ink-400);
  }

  .mobile-bar{display:none}

  /* ---------- Responsive ---------- */
  @media (max-width:1080px){
    .doc-grid{grid-template-columns:230px minmax(0,1fr);gap:24px}
    .benefit-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  }
  @media (max-width:1023px){
    .page-hero-inner{grid-template-columns:1fr;gap:26px;padding:34px 30px}
    .page-hero-figure{order:-1}
    .page-hero-figure img{aspect-ratio:16/9}
    .doc-toc{display:none}
    .doc-grid{grid-template-columns:minmax(0,1fr)}
    .preview-card{grid-template-columns:1fr}
    .preview-media{min-height:240px;aspect-ratio:16/9}
    .preview-media img{position:static;height:100%}
  }
  @media (max-width:900px){
    .nav-links{
      position:absolute;left:0;right:0;top:calc(100% + 10px);
      display:none;flex-direction:column;align-items:stretch;gap:6px;
      background:#fff;border:1px solid var(--line);border-radius:var(--r-sm);
      padding:10px;box-shadow:var(--shadow-2);z-index:80;
    }
    body.nav-open .nav-links{display:flex}
    .nav-chip{width:100%;height:48px;justify-content:flex-start;background:var(--brand-50)}
    .menu-toggle{display:inline-flex}
    .nav-cta .btn{display:none}
    .nav-card{justify-content:space-between}
  }
  @media (max-width:768px){
    .shell{padding:0 16px}
    .page-hero{margin-top:16px;border-radius:var(--r-sm)}
    .page-hero-inner{padding:26px 20px 30px}
    .doc-section{padding:40px 0 48px}
    .doc-block{padding:22px 20px;border-radius:var(--r-sm)}
    .doc-block h2{font-size:19px}
    .spec-row{grid-template-columns:1fr}
    .benefit-grid{grid-template-columns:1fr}
    .section-head{margin-bottom:20px}
    .preview-copy{padding:24px 20px}
    .cta-band{flex-direction:column;align-items:flex-start;padding:28px 22px;gap:20px}
    .cta-actions{width:100%}
    .cta-actions .btn{flex:1;justify-content:center}
    .footer-grid{grid-template-columns:1fr 1fr;gap:24px}
    .faq-item summary{padding:16px 18px;font-size:15px}
    .faq-answer{padding:0 18px 18px;font-size:14.5px}
    .mobile-bar{
      display:flex;align-items:center;justify-content:center;
      position:fixed;left:0;right:0;bottom:0;z-index:70;
      height:56px;background:var(--brand);color:#fff;
      font-size:15px;font-weight:600;
      box-shadow:0 -8px 22px rgba(15,30,51,.16);
    }
    body{padding-bottom:56px}
  }
  @media (max-width:520px){
    .page-hero .lead{font-size:15px}
    .footer-grid{grid-template-columns:1fr}
    .footer-bottom{flex-direction:column;gap:8px}
    .logo-text{font-size:16px}
    .nav-card{gap:10px}
  }

/* roulang page: category3 */
:root{
    --brand:#1B5FD0;
    --brand-dark:#1548A6;
    --brand-600:#2266D6;
    --brand-50:#EEF4FF;
    --accent:#FF7A3D;
    --accent-50:#FFF1E9;
    --accent-ink:#C2410C;
    --teal:#0E9F8A;
    --teal-50:#E6F6F3;
    --teal-ink:#0B7F6E;
    --ink-900:#0E1726;
    --ink-700:#2A3A52;
    --ink-600:#45566E;
    --ink-400:#7A8AA0;
    --ink-300:#A9B6C7;
    --bg:#F5F7FA;
    --surface:#FFFFFF;
    --line:#E3E9F2;
    --r-lg:24px;
    --r-md:16px;
    --r-sm:12px;
    --shadow-1:0 6px 18px rgba(15,30,51,.06);
    --shadow-2:0 14px 34px rgba(15,30,51,.12);
  }
  *,*::before,*::after{box-sizing:border-box}
  html{-webkit-text-size-adjust:100%}
  body{
    margin:0;
    background:var(--bg);
    color:var(--ink-600);
    font-family:-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
    font-size:16px;
    line-height:1.75;
    -webkit-font-smoothing:antialiased;
  }
  h1,h2,h3,h4,p,ul,ol,figure{margin:0}
  ul,ol{padding:0;list-style:none}
  img{display:block;max-width:100%}
  a{color:inherit;text-decoration:none}
  button{font:inherit;color:inherit;background:none;border:none;cursor:pointer}
  :focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px}

  .shell{max-width:1280px;margin:0 auto;padding:0 24px}
  .block{padding-top:88px}

  /* ---------- header ---------- */
  .site-header{
    position:sticky;top:0;z-index:80;
    background:var(--bg);
    border-bottom:1px solid transparent;
    transition:box-shadow .2s ease,border-color .2s ease;
  }
  .site-header.scrolled{box-shadow:0 8px 24px rgba(15,30,51,.07);border-bottom-color:var(--line)}
  .header-inner{padding:10px 0}
  .nav-card{
    display:flex;align-items:center;justify-content:space-between;gap:16px;
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:20px;
    padding:10px 14px;
    box-shadow:var(--shadow-1);
    position:relative;
    min-height:72px;
  }
  .logo{display:inline-flex;align-items:center;gap:10px;flex:none}
  .logo-mark{
    width:36px;height:36px;border-radius:12px;background:var(--brand);color:#fff;
    display:flex;align-items:center;justify-content:center;font-size:18px;font-weight:800;letter-spacing:-.5px;
  }
  .logo-text{font-size:18px;font-weight:700;color:var(--ink-900);letter-spacing:-.2px;white-space:nowrap}
  .nav-links{display:flex;align-items:center;gap:8px;flex-wrap:nowrap}
  .nav-chip{
    height:40px;display:inline-flex;align-items:center;padding:0 14px;border-radius:12px;
    background:var(--brand-50);color:var(--ink-700);font-size:14px;font-weight:500;
    border:1px solid transparent;transition:background .2s,color .2s,border-color .2s;white-space:nowrap;
  }
  .nav-chip:hover{background:#fff;border-color:var(--brand);color:var(--brand-dark)}
  .nav-chip.active{background:#fff;border-color:#D6E3F8;color:var(--brand-dark);font-weight:700;box-shadow:inset 3px 0 0 var(--brand)}
  .nav-actions{display:flex;align-items:center;gap:10px;flex:none}
  .nav-toggle{
    display:none;width:40px;height:40px;border-radius:12px;border:1px solid var(--line);
    background:#fff;align-items:center;justify-content:center;
  }
  .nav-toggle span{display:block;width:16px;height:2px;background:var(--ink-700);border-radius:2px;position:relative}
  .nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;width:16px;height:2px;background:var(--ink-700);border-radius:2px;transition:transform .2s}
  .nav-toggle span::before{top:-5px}
  .nav-toggle span::after{top:5px}
  .nav-cta-mobile{display:none}

  /* ---------- buttons ---------- */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    height:48px;padding:0 24px;border-radius:12px;
    font-size:15px;font-weight:600;line-height:1;
    border:1px solid transparent;cursor:pointer;
    transition:background .2s ease,color .2s ease,border-color .2s ease,box-shadow .2s ease,transform .2s ease;
  }
  .btn-primary{background:var(--brand);color:#fff}
  .btn-primary:hover{background:var(--brand-dark);box-shadow:var(--shadow-2);transform:translateY(-1px)}
  .btn-primary:active{transform:translateY(0);box-shadow:none}
  .btn-ghost{background:#fff;border-color:var(--line);color:var(--ink-700)}
  .btn-ghost:hover{border-color:var(--brand);color:var(--brand-dark)}
  .btn-light{background:#fff;color:var(--brand-dark)}
  .btn-light:hover{background:var(--brand-50);transform:translateY(-1px)}
  .btn-outline-light{background:transparent;border-color:rgba(255,255,255,.55);color:#fff}
  .btn-outline-light:hover{background:rgba(255,255,255,.14);border-color:#fff}
  .btn-sm{height:40px;padding:0 18px;font-size:14px}
  .text-link{
    display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--brand-600);
    transition:color .2s ease;
  }
  .text-link svg{transition:transform .2s ease}
  .text-link:hover{color:var(--brand-dark)}
  .text-link:hover svg{transform:translateX(3px)}

  /* ---------- badges / chips ---------- */
  .badge{
    display:inline-flex;align-items:center;height:22px;padding:0 8px;border-radius:6px;
    font-size:12px;font-weight:600;background:var(--brand-50);color:var(--brand-dark);
  }
  .badge-accent{background:var(--accent-50);color:var(--accent-ink)}
  .badge-teal{background:var(--teal-50);color:var(--teal-ink)}
  .chip-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
  .chip{
    height:36px;padding:0 16px;border-radius:999px;background:#fff;border:1px solid var(--line);
    color:var(--ink-600);font-size:14px;font-weight:500;display:inline-flex;align-items:center;
    transition:background .2s,border-color .2s,color .2s;
  }
  .chip:hover{border-color:var(--brand);color:var(--brand-dark)}
  .chip.active{background:var(--brand);border-color:var(--brand);color:#fff}

  /* ---------- page head ---------- */
  .page-head{padding-top:32px}
  .crumbs{font-size:13px;color:var(--ink-400);margin-bottom:16px}
  .crumbs a:hover{color:var(--brand-600)}
  .crumbs .sep{padding:0 6px;color:var(--ink-300)}
  .crumbs .current{color:var(--ink-700)}
  .head-card{
    display:grid;grid-template-columns:1.12fr .88fr;gap:32px;
    background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
    padding:32px;box-shadow:var(--shadow-1);
  }
  .head-card h1{
    font-size:clamp(26px,3.2vw,40px);font-weight:700;line-height:1.3;letter-spacing:-.3px;
    color:var(--ink-900);margin-top:14px;
  }
  .head-lead{font-size:16px;line-height:1.8;color:var(--ink-600);margin-top:14px;max-width:580px}
  .head-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}
  .head-media{
    border-radius:18px;overflow:hidden;background:#E4EBF5;aspect-ratio:16/11;align-self:stretch;
  }
  .head-media img{width:100%;height:100%;object-fit:cover}

  /* ---------- section head ---------- */
  .sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:28px}
  .sec-head h2{font-size:clamp(22px,2.4vw,30px);font-weight:700;color:var(--ink-900);letter-spacing:-.3px;line-height:1.3}
  .sec-head p{font-size:14px;color:var(--ink-400);margin-top:8px;max-width:620px}

  /* ---------- rail ---------- */
  .rail-wrap{position:relative}
  .rail{
    display:flex;gap:16px;overflow-x:auto;scroll-snap-type:x mandatory;
    padding:6px 2px 14px;scrollbar-width:none;-ms-overflow-style:none;
  }
  .rail::-webkit-scrollbar{display:none}
  .rail-fade{
    position:absolute;top:0;bottom:14px;right:0;width:72px;pointer-events:none;
    background:linear-gradient(90deg,rgba(245,247,250,0),var(--bg));z-index:1;
  }
  .rail-arrow{
    position:absolute;top:44%;transform:translateY(-50%);z-index:3;
    width:40px;height:40px;border-radius:50%;background:#fff;color:var(--ink-700);
    box-shadow:var(--shadow-2);display:flex;align-items:center;justify-content:center;
    border:1px solid var(--line);transition:background .2s,color .2s,opacity .2s;
  }
  .rail-arrow:hover{background:var(--brand);color:#fff;border-color:var(--brand)}
  .rail-arrow.prev{left:-12px}
  .rail-arrow.next{right:-12px}
  .poster-card{flex:0 0 168px;width:168px;scroll-snap-align:start}
  .poster{
    position:relative;display:block;aspect-ratio:2/3;border-radius:16px;overflow:hidden;
    background:#E3E9F2;border:1px solid var(--line);
  }
  .poster img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
  .poster-card:hover .poster img{transform:scale(1.04)}
  .poster-badge{position:absolute;left:10px;top:10px}
  .poster-title{
    margin-top:10px;font-size:15px;font-weight:600;line-height:1.45;color:var(--ink-900);
    display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  }
  .poster-meta{font-size:13px;color:var(--ink-400);margin-top:4px}

  /* ---------- timeline ---------- */
  .timeline{display:flex;flex-direction:column;gap:24px;position:relative}
  .tl-item{display:grid;grid-template-columns:72px minmax(0,1fr);gap:20px;position:relative}
  .tl-item::before{
    content:"";position:absolute;left:35px;top:82px;bottom:-32px;
    border-left:1px dashed #CFDAE8;
  }
  .tl-item:last-child::before{display:none}
  .tl-index{
    width:72px;height:72px;border-radius:18px;background:#fff;border:1px solid var(--line);
    display:flex;align-items:center;justify-content:center;
    font-size:26px;font-weight:800;color:var(--ink-300);letter-spacing:-1px;
    box-shadow:var(--shadow-1);position:relative;z-index:1;
  }
  .tl-item:first-child .tl-index{color:var(--accent);border-color:#FBD9C6}
  .tl-card{
    display:grid;grid-template-columns:230px minmax(0,1fr);gap:20px;
    background:var(--surface);border:1px solid var(--line);border-radius:20px;padding:16px;
    box-shadow:var(--shadow-1);
    transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
  }
  .tl-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:#D6E3F8}
  .tl-media{aspect-ratio:16/10;border-radius:12px;overflow:hidden;background:#E4EBF5}
  .tl-media img{width:100%;height:100%;object-fit:cover}
  .tl-body h3{font-size:19px;font-weight:600;color:var(--ink-900);line-height:1.4;margin-top:10px}
  .tl-body p{font-size:14px;line-height:1.8;color:var(--ink-600);margin-top:8px}
  .tl-meta{display:flex;flex-wrap:wrap;gap:8px 18px;margin-top:14px;font-size:13px;color:var(--ink-400)}
  .tl-meta span{display:inline-flex;align-items:center;gap:6px}
  .tl-link{margin-top:14px}

  /* ---------- immersive ---------- */
  .immersive{position:relative;border-radius:var(--r-lg);overflow:hidden;min-height:440px;display:flex;align-items:center}
  .immersive-bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
  .immersive::after{
    content:"";position:absolute;inset:0;
    background:linear-gradient(90deg,rgba(11,23,40,.93) 0%,rgba(11,23,40,.68) 52%,rgba(11,23,40,.22) 100%);
  }
  .immersive-body{position:relative;z-index:2;padding:56px;max-width:640px;color:#fff}
  .immersive-body h2{font-size:clamp(22px,2.6vw,32px);font-weight:700;line-height:1.3;margin-top:16px;letter-spacing:-.3px}
  .immersive-body p{font-size:15px;line-height:1.85;color:rgba(255,255,255,.82);margin-top:14px}
  .immersive-list{margin-top:18px;display:flex;flex-direction:column;gap:10px}
  .immersive-list li{display:flex;align-items:flex-start;gap:10px;font-size:14px;color:rgba(255,255,255,.86)}
  .immersive-list li::before{
    content:"";flex:none;width:6px;height:6px;border-radius:50%;background:var(--accent);margin-top:9px;
  }
  .immersive-actions{margin-top:26px;display:flex;flex-wrap:wrap;gap:12px}

  /* ---------- stats ---------- */
  .stat-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}
  .stat-card{
    background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
    padding:22px 20px;box-shadow:var(--shadow-1);transition:transform .2s,box-shadow .2s,border-color .2s;
  }
  .stat-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-2);border-color:#D6E3F8}
  .stat-num{font-size:28px;font-weight:800;color:var(--brand-dark);letter-spacing:-.5px;line-height:1.2}
  .stat-num em{font-size:14px;font-weight:600;font-style:normal;color:var(--ink-400);margin-left:4px}
  .stat-label{font-size:14px;font-weight:600;color:var(--ink-700);margin-top:6px}
  .stat-desc{font-size:13px;color:var(--ink-400);margin-top:4px;line-height:1.7}

  /* ---------- faq ---------- */
  .faq-layout{display:grid;grid-template-columns:.8fr 1.2fr;gap:48px;align-items:start}
  .faq-aside{position:sticky;top:104px}
  .faq-aside h2{font-size:clamp(22px,2.4vw,30px);font-weight:700;color:var(--ink-900);line-height:1.3;letter-spacing:-.3px}
  .faq-aside p{font-size:15px;line-height:1.85;color:var(--ink-600);margin-top:12px}
  .faq-list{display:flex;flex-direction:column;gap:12px}
  .faq-item{
    background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
    padding:0 20px;transition:border-color .2s,box-shadow .2s;
  }
  .faq-item:hover{border-color:#D6E3F8}
  .faq-item[open]{border-color:#D6E3F8;box-shadow:var(--shadow-1)}
  .faq-item summary{
    list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:16px;
    min-height:60px;font-size:16px;font-weight:600;color:var(--ink-900);line-height:1.5;
  }
  .faq-item summary::-webkit-details-marker{display:none}
  .faq-mark{position:relative;flex:none;width:16px;height:16px}
  .faq-mark::before{content:"";position:absolute;left:0;right:0;top:7px;height:2px;border-radius:2px;background:var(--brand)}
  .faq-mark::after{
    content:"";position:absolute;top:0;bottom:0;left:7px;width:2px;border-radius:2px;
    background:var(--brand);transition:transform .2s ease;
  }
  .faq-item[open] .faq-mark::after{transform:scaleY(0)}
  .faq-body{padding:0 0 20px;font-size:15px;line-height:1.85;color:var(--ink-600)}

  /* ---------- cta ---------- */
  .cta-band{
    position:relative;overflow:hidden;border-radius:var(--r-lg);
    background:var(--brand-dark);
    padding:48px;display:flex;align-items:center;justify-content:space-between;gap:32px;color:#fff;
  }
  .cta-band::after{
    content:"";position:absolute;right:-80px;top:-90px;width:320px;height:320px;border-radius:50%;
    background:radial-gradient(circle,rgba(255,122,61,.45),rgba(255,122,61,0) 68%);
  }
  .cta-band h2{font-size:clamp(22px,2.4vw,30px);font-weight:700;line-height:1.3;letter-spacing:-.3px;position:relative;z-index:1}
  .cta-band p{font-size:15px;line-height:1.85;color:rgba(255,255,255,.82);margin-top:12px;max-width:620px;position:relative;z-index:1}
  .cta-actions{display:flex;flex-wrap:wrap;gap:12px;position:relative;z-index:1;flex:none}

  /* ---------- footer ---------- */
  .site-footer{background:#EDF1F7;border-top:1px solid var(--line);margin-top:96px;padding:64px 0 32px}
  .footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:32px}
  .footer-title{font-size:14px;font-weight:700;color:var(--ink-900);margin-bottom:14px}
  .footer-link{display:block;font-size:14px;color:var(--ink-600);padding:6px 0;transition:color .2s}
  .footer-link:hover{color:var(--brand-600)}
  .footer-text{font-size:14px;line-height:1.85;color:var(--ink-600);margin-top:14px;max-width:340px}
  .footer-info{font-size:13px;color:var(--ink-400);line-height:1.8;margin-bottom:8px}
  .footer-bottom{
    border-top:1px solid var(--line);margin-top:40px;padding-top:20px;
    display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
    font-size:13px;color:var(--ink-400);
  }

  /* ---------- mobile bar ---------- */
  .mobile-bar{display:none}

  /* ---------- responsive ---------- */
  @media (max-width:1100px){
    .nav-chip{padding:0 11px;font-size:13px}
    .nav-card{gap:12px}
  }
  @media (max-width:1023px){
    .head-card{grid-template-columns:1fr;padding:24px}
    .head-media{order:-1;aspect-ratio:16/9}
    .faq-layout{grid-template-columns:1fr;gap:28px}
    .faq-aside{position:static}
    .stat-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
    .tl-card{grid-template-columns:200px minmax(0,1fr)}
  }
  @media (max-width:899px){
    .nav-toggle{display:flex}
    .nav-actions .btn{display:none}
    .nav-links{
      position:absolute;top:calc(100% + 10px);left:0;right:0;z-index:90;
      flex-direction:column;align-items:stretch;gap:8px;
      background:#fff;border:1px solid var(--line);border-radius:20px;
      padding:12px;box-shadow:var(--shadow-2);
      display:none;
    }
    .nav-links.open{display:flex}
    .nav-chip{height:48px;justify-content:flex-start;padding:0 16px;font-size:15px}
    .nav-cta-mobile{display:inline-flex;margin-top:4px}
    .rail-arrow{display:none}
    .rail-fade{width:48px}
  }
  @media (max-width:767px){
    .shell{padding:0 16px}
    .block{padding-top:56px}
    .nav-card{min-height:60px;border-radius:16px;padding:8px 12px}
    .logo-text{font-size:16px}
    .logo-mark{width:32px;height:32px;border-radius:10px;font-size:16px}
    .head-card h1{font-size:26px}
    .head-actions .btn{flex:1 1 auto}
    .sec-head{flex-direction:column;align-items:flex-start;gap:12px}
    .poster-card{flex:0 0 132px;width:132px}
    .poster-title{font-size:14px}
    .timeline{gap:18px}
    .tl-item{grid-template-columns:48px minmax(0,1fr);gap:14px}
    .tl-index{width:48px;height:48px;font-size:18px;border-radius:14px}
    .tl-item::before{left:23px;top:56px;bottom:-24px}
    .tl-card{grid-template-columns:1fr;padding:14px}
    .tl-media{aspect-ratio:16/9}
    .immersive{min-height:0;border-radius:20px}
    .immersive-body{padding:28px 22px}
    .immersive-actions .btn{flex:1 1 auto}
    .cta-band{flex-direction:column;align-items:flex-start;padding:28px 22px;border-radius:20px}
    .cta-actions{width:100%}
    .cta-actions .btn{flex:1 1 auto}
    .stat-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
    .stat-card{padding:16px}
    .stat-num{font-size:22px}
    .footer-grid{grid-template-columns:1fr;gap:24px}
    .footer-bottom{flex-direction:column;gap:6px}
    .site-footer{margin-top:64px;padding:40px 0 88px}
    .mobile-bar{
      display:flex;position:fixed;left:0;right:0;bottom:0;z-index:70;
      padding:10px 16px calc(10px + env(safe-area-inset-bottom));
      background:#fff;border-top:1px solid var(--line);box-shadow:0 -6px 18px rgba(15,30,51,.06);
    }
    .mobile-bar .btn{flex:1}
  }
  @media (max-width:520px){
    .head-card{padding:18px;border-radius:18px}
    .chip{height:32px;padding:0 13px;font-size:13px}
    .faq-item{padding:0 16px}
    .faq-item summary{font-size:15px}
    .stat-grid{grid-template-columns:1fr}
  }

/* roulang page: category4 */
:root{
  --brand:#1B5FD0;
  --brand-dark:#1548A6;
  --brand-50:#EEF4FF;
  --brand-100:#DCE8FF;
  --accent:#FF7A3D;
  --accent-50:#FFF1E9;
  --accent-ink:#C2410C;
  --teal:#0E9F8A;
  --teal-50:#E7F7F4;
  --teal-ink:#0A7A69;
  --ink-900:#0E1726;
  --ink-800:#1B2739;
  --ink-700:#2A3A52;
  --ink-600:#45566E;
  --ink-400:#7A8AA0;
  --ink-300:#A9B6C7;
  --bg:#F5F7FA;
  --surface:#FFFFFF;
  --line:#E3E9F2;
  --thumb-bg:#E8EDF5;
  --r-card:16px;
  --r-sm:12px;
  --r-lg:24px;
  --shadow-1:0 6px 18px rgba(15,30,51,.06);
  --shadow-2:0 14px 34px rgba(15,30,51,.12);
  --t:200ms ease-out;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink-600);
  font-family:-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer}
h1,h2,h3,h4,p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
::selection{background:var(--brand-100);color:var(--ink-900)}
.shell{width:100%;max-width:1280px;margin:0 auto;padding:0 24px}
.section{padding:72px 0}
.section-tight{padding:48px 0}

/* ---------- Header ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(245,247,250,.96);
  border-bottom:1px solid transparent;
  transition:box-shadow var(--t),border-color var(--t),background var(--t);
}
.site-header.scrolled{
  box-shadow:0 8px 24px rgba(15,30,51,.08);
  border-bottom-color:var(--line);
  background:rgba(245,247,250,.99);
}
.nav-wrap{padding:12px 0}
.nav-panel{
  display:flex;
  align-items:center;
  gap:16px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-panel,20px);
  padding:10px 14px;
  box-shadow:var(--shadow-1);
}
.logo{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}
.logo-mark{
  width:38px;height:38px;border-radius:12px;
  background:var(--brand);color:#fff;
  display:inline-flex;align-items:center;justify-content:center;
  font-weight:800;font-size:18px;letter-spacing:-.4px;
  box-shadow:0 4px 12px rgba(27,95,208,.28);
}
.logo-text{
  font-size:18px;font-weight:700;color:var(--ink-900);
  letter-spacing:-.2px;white-space:nowrap;
}
.nav-links{display:flex;align-items:center;gap:8px;flex:1 1 auto;flex-wrap:nowrap}
.nav-chip{
  display:inline-flex;align-items:center;justify-content:center;
  height:40px;padding:0 14px;border-radius:12px;
  background:var(--brand-50);color:var(--ink-700);
  font-size:14px;font-weight:500;white-space:nowrap;
  border:1px solid transparent;
  transition:background var(--t),color var(--t),border-color var(--t),box-shadow var(--t);
}
.nav-chip:hover{background:#fff;border-color:var(--brand);color:var(--brand-dark)}
.nav-chip:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
.nav-chip.active{
  background:#fff;color:var(--brand-dark);font-weight:600;
  box-shadow:inset 3px 0 0 var(--brand),0 2px 8px rgba(27,95,208,.10);
  border-color:var(--brand-100);
}
.nav-cta{flex:0 0 auto;display:flex;align-items:center;gap:10px}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:12px;
  font-size:15px;font-weight:600;border:1px solid transparent;
  transition:background var(--t),color var(--t),border-color var(--t),box-shadow var(--t),transform var(--t);
}
.btn:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 8px 20px rgba(27,95,208,.22)}
.btn-primary:hover{background:var(--brand-dark);box-shadow:0 12px 26px rgba(27,95,208,.30);transform:translateY(-1px)}
.btn-primary:active{transform:translateY(0);box-shadow:none}
.btn-ghost{background:#fff;color:var(--ink-800);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand-dark);background:#fff}
.btn-ghost:active{transform:translateY(0)}
.btn-sm{height:40px;padding:0 16px;font-size:14px;border-radius:12px}
.link-arrow{
  display:inline-flex;align-items:center;gap:6px;
  font-size:14px;font-weight:600;color:var(--brand);
  transition:color var(--t);
}
.link-arrow::after{content:"→";transition:transform var(--t)}
.link-arrow:hover{color:var(--brand-dark)}
.link-arrow:hover::after{transform:translateX(2px)}
.link-arrow:focus-visible{outline:2px solid var(--brand);outline-offset:3px;border-radius:6px}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:12px;
  border:1px solid var(--line);background:#fff;
  align-items:center;justify-content:center;flex-direction:column;gap:4px;
  margin-left:auto;
}
.nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--ink-700);transition:transform var(--t),opacity var(--t)}
.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)}
.nav-drawer{display:none}
.nav-drawer.open{display:block;margin-top:10px}
.drawer-card{
  background:#fff;border:1px solid var(--line);border-radius:20px;
  box-shadow:var(--shadow-2);padding:12px;
  display:flex;flex-direction:column;gap:8px;
}
.drawer-link{
  display:flex;align-items:center;height:48px;padding:0 14px;border-radius:12px;
  background:var(--brand-50);color:var(--ink-700);font-size:15px;font-weight:500;
}
.drawer-link.active{background:#fff;color:var(--brand-dark);font-weight:600;box-shadow:inset 3px 0 0 var(--brand)}
.drawer-link:active{background:#fff}
.drawer-cta{margin-top:4px}
.drawer-cta .btn{width:100%}

/* ---------- Breadcrumb ---------- */
.crumb{
  display:flex;align-items:center;gap:8px;flex-wrap:wrap;
  font-size:13px;color:var(--ink-400);padding:24px 0 0;
}
.crumb a{color:var(--ink-400);transition:color var(--t)}
.crumb a:hover{color:var(--brand)}
.crumb .sep{color:var(--ink-300)}
.crumb .current{color:var(--ink-700);font-weight:500}

/* ---------- Page head ---------- */
.page-head{
  margin-top:18px;
  position:relative;
  overflow:hidden;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  padding:40px 40px 32px;
  box-shadow:var(--shadow-1);
}
.page-head::after{
  content:"";
  position:absolute;right:-90px;top:-90px;width:320px;height:320px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(27,95,208,.10),rgba(27,95,208,0) 68%);
  pointer-events:none;
}
.page-head-inner{position:relative;z-index:1;max-width:820px}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  height:26px;padding:0 10px;border-radius:999px;
  font-size:12px;font-weight:600;letter-spacing:.2px;
}
.badge-brand{background:var(--brand-50);color:var(--brand-dark)}
.badge-teal{background:var(--teal-50);color:var(--teal-ink)}
.badge-accent{background:var(--accent-50);color:var(--accent-ink)}
.page-head h1{
  margin-top:16px;
  font-size:clamp(26px,3.2vw,40px);
  line-height:1.28;
  font-weight:700;
  color:var(--ink-900);
  letter-spacing:-.3px;
}
.page-head .lead{
  margin-top:14px;
  font-size:16px;line-height:1.85;color:var(--ink-600);
  max-width:720px;
}
.chip-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.chip{
  height:36px;padding:0 16px;border-radius:999px;
  border:1px solid var(--line);background:#fff;
  font-size:14px;font-weight:500;color:var(--ink-600);
  display:inline-flex;align-items:center;
  transition:background var(--t),color var(--t),border-color var(--t),box-shadow var(--t);
}
.chip:hover{border-color:var(--brand);color:var(--brand-dark)}
.chip:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
.chip.active{background:var(--brand);border-color:var(--brand);color:#fff;box-shadow:0 6px 16px rgba(27,95,208,.24)}
.stat-row{
  display:grid;grid-template-columns:repeat(4,1fr);
  gap:1px;margin-top:32px;
  background:var(--line);border:1px solid var(--line);border-radius:14px;overflow:hidden;
}
.stat-cell{background:#fff;padding:16px 18px}
.stat-cell .k{font-size:13px;color:var(--ink-400)}
.stat-cell .v{font-size:16px;font-weight:600;color:var(--ink-900);margin-top:4px}

/* ---------- Section head ---------- */
.sec-head{
  display:flex;align-items:flex-end;justify-content:space-between;gap:24px;
  margin-bottom:28px;
}
.sec-head h2{
  font-size:clamp(22px,2.4vw,28px);
  font-weight:700;color:var(--ink-900);letter-spacing:-.2px;
  line-height:1.35;
}
.sec-head .sub{
  margin-top:8px;font-size:15px;color:var(--ink-400);max-width:640px;
}
.sec-line{
  display:flex;align-items:center;gap:10px;
  font-size:13px;font-weight:600;color:var(--ink-400);
  margin-bottom:14px;
}
.sec-line::before{content:"";width:3px;height:14px;border-radius:2px;background:var(--brand)}

/* ---------- Guide grid ---------- */
.guide-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.guide-card{
  display:flex;flex-direction:column;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  overflow:hidden;
  box-shadow:var(--shadow-1);
  transition:transform var(--t),box-shadow var(--t),border-color var(--t);
}
.guide-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:var(--brand-100)}
.guide-card:focus-visible{outline:2px solid var(--brand);outline-offset:3px}
.guide-thumb{
  position:relative;
  aspect-ratio:16/9;
  background:var(--thumb-bg);
  overflow:hidden;
}
.guide-thumb img{width:100%;height:100%;object-fit:cover;transition:transform 400ms ease-out}
.guide-card:hover .guide-thumb img{transform:scale(1.04)}
.guide-thumb .tag{
  position:absolute;top:12px;left:12px;
  height:22px;padding:0 8px;border-radius:6px;
  display:inline-flex;align-items:center;
  font-size:12px;font-weight:600;
  background:rgba(255,255,255,.94);color:var(--brand-dark);
}
.guide-body{padding:18px 18px 20px;display:flex;flex-direction:column;gap:10px;flex:1 1 auto}
.guide-meta{display:flex;align-items:center;gap:8px;font-size:12px;color:var(--ink-400)}
.guide-meta .dot{width:3px;height:3px;border-radius:50%;background:var(--ink-300)}
.guide-title{
  font-size:16px;font-weight:600;line-height:1.45;color:var(--ink-900);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.guide-card:hover .guide-title{color:var(--brand-dark)}
.guide-desc{
  font-size:14px;line-height:1.7;color:var(--ink-600);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.guide-foot{
  margin-top:auto;padding-top:12px;
  display:flex;align-items:center;justify-content:space-between;
  border-top:1px solid var(--line);
}
.guide-foot .time{font-size:13px;color:var(--ink-400)}

/* ---------- Checklist strip ---------- */
.strip{
  display:grid;grid-template-columns:repeat(3,1fr);gap:20px;
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-lg);padding:28px;box-shadow:var(--shadow-1);
}
.strip-item{display:flex;gap:14px;align-items:flex-start}
.strip-num{
  flex:0 0 auto;width:32px;height:32px;border-radius:10px;
  background:var(--brand-50);color:var(--brand-dark);
  display:flex;align-items:center;justify-content:center;
  font-size:13px;font-weight:700;
}
.strip-item h3{font-size:16px;font-weight:600;color:var(--ink-900);line-height:1.45}
.strip-item p{margin-top:6px;font-size:14px;line-height:1.7;color:var(--ink-600)}

/* ---------- Scenario ---------- */
.scene{
  display:grid;grid-template-columns:5fr 7fr;gap:40px;align-items:center;
}
.scene-figure{
  position:relative;border-radius:var(--r-lg);overflow:hidden;
  background:var(--thumb-bg);box-shadow:var(--shadow-1);
  aspect-ratio:4/3;
}
.scene-figure img{width:100%;height:100%;object-fit:cover}
.scene-figure .cap{
  position:absolute;left:16px;bottom:16px;
  background:rgba(14,23,38,.72);color:#fff;
  font-size:12px;padding:6px 12px;border-radius:999px;
}
.scene-list{display:flex;flex-direction:column;gap:18px}
.scene-item{
  display:flex;gap:16px;padding:18px 20px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  transition:border-color var(--t),box-shadow var(--t),transform var(--t);
}
.scene-item:hover{border-color:var(--brand-100);box-shadow:var(--shadow-1);transform:translateY(-2px)}
.scene-item .idx{
  flex:0 0 auto;font-size:20px;font-weight:800;color:var(--ink-300);
  line-height:1.2;min-width:34px;
}
.scene-item h3{font-size:16px;font-weight:600;color:var(--ink-900)}
.scene-item p{margin-top:6px;font-size:14px;line-height:1.72;color:var(--ink-600)}

/* ---------- Steps ---------- */
.steps-wrap{
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-lg);padding:36px 32px;box-shadow:var(--shadow-1);
}
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;position:relative}
.step{position:relative;padding-right:16px}
.step-num{
  width:34px;height:34px;border-radius:50%;
  background:var(--brand);color:#fff;
  display:flex;align-items:center;justify-content:center;
  font-size:14px;font-weight:700;
  box-shadow:0 6px 16px rgba(27,95,208,.26);
}
.step::after{
  content:"";position:absolute;top:17px;left:44px;right:8px;
  border-top:1px dashed var(--line);
}
.step:last-child::after{display:none}
.step h3{margin-top:16px;font-size:15px;font-weight:600;color:var(--ink-900)}
.step p{margin-top:6px;font-size:13px;line-height:1.7;color:var(--ink-600)}

/* ---------- FAQ ---------- */
.faq-layout{display:grid;grid-template-columns:4fr 8fr;gap:40px;align-items:start}
.faq-aside{position:sticky;top:100px}
.faq-aside h2{font-size:clamp(22px,2.4vw,28px);font-weight:700;color:var(--ink-900);line-height:1.35}
.faq-aside p{margin-top:12px;font-size:15px;line-height:1.8;color:var(--ink-600)}
.faq-aside .btn{margin-top:22px}
.faq-list{display:flex;flex-direction:column;gap:12px}
.faq-item{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;transition:border-color var(--t),box-shadow var(--t);
}
.faq-item[open]{border-color:var(--brand-100);box-shadow:var(--shadow-1)}
.faq-item summary{
  list-style:none;cursor:pointer;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 20px;font-size:16px;font-weight:600;color:var(--ink-900);
  min-height:56px;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:focus-visible{outline:2px solid var(--brand);outline-offset:-2px}
.faq-item summary .ico{
  flex:0 0 auto;width:24px;height:24px;border-radius:8px;
  background:var(--brand-50);color:var(--brand);
  display:flex;align-items:center;justify-content:center;
  font-size:16px;font-weight:600;line-height:1;
  transition:background var(--t),color var(--t);
}
.faq-item[open] summary .ico{background:var(--brand);color:#fff}
.faq-answer{padding:0 20px 20px;font-size:15px;line-height:1.85;color:var(--ink-600)}

/* ---------- CTA ---------- */
.cta-band{
  background:var(--brand-dark);
  border-radius:var(--r-lg);
  padding:44px 40px;
  display:flex;align-items:center;justify-content:space-between;gap:32px;
  position:relative;overflow:hidden;
}
.cta-band::after{
  content:"";position:absolute;right:-60px;bottom:-120px;
  width:280px;height:280px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,122,61,.32),rgba(255,122,61,0) 70%);
  pointer-events:none;
}
.cta-band h2{font-size:clamp(22px,2.6vw,30px);font-weight:700;color:#fff;line-height:1.35;position:relative;z-index:1}
.cta-band p{margin-top:10px;font-size:15px;color:rgba(255,255,255,.78);max-width:560px;position:relative;z-index:1}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap;position:relative;z-index:1;flex:0 0 auto}
.cta-actions .btn-primary{background:#fff;color:var(--brand-dark);box-shadow:0 10px 24px rgba(0,0,0,.18)}
.cta-actions .btn-primary:hover{background:#F2F6FF;color:var(--brand-dark)}
.cta-actions .btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.42)}
.cta-actions .btn-ghost:hover{background:rgba(255,255,255,.10);border-color:#fff;color:#fff}

/* ---------- Footer ---------- */
.site-footer{background:#EDF1F7;border-top:1px solid var(--line);margin-top:72px}
.footer-grid{
  display:grid;grid-template-columns:2.2fr 1fr 1fr 1.4fr;gap:40px;
  padding:56px 0 40px;
}
.footer-text{margin-top:16px;font-size:14px;line-height:1.85;color:var(--ink-600);max-width:340px}
.footer-title{font-size:14px;font-weight:600;color:var(--ink-900);margin-bottom:14px}
.footer-link{
  display:block;font-size:14px;color:var(--ink-600);padding:6px 0;
  transition:color var(--t),transform var(--t);
}
.footer-link:hover{color:var(--brand);transform:translateX(2px)}
.footer-link:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px}
.footer-info{font-size:14px;line-height:1.8;color:var(--ink-600);margin-bottom:8px}
.footer-bottom{
  border-top:1px solid var(--line);
  padding:20px 0 32px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  font-size:13px;color:var(--ink-400);flex-wrap:wrap;
}

/* ---------- Mobile bar ---------- */
.mobile-bar{display:none}

/* ---------- Responsive ---------- */
@media (max-width:1180px){
  .nav-chip{padding:0 10px;font-size:13px}
  .nav-panel{gap:10px}
  .logo-text{font-size:16px}
}
@media (max-width:1023px){
  .nav-links{display:none}
  .nav-cta{display:none}
  .nav-toggle{display:flex}
  .guide-grid{grid-template-columns:repeat(2,1fr)}
  .strip{grid-template-columns:1fr;gap:16px}
  .scene{grid-template-columns:1fr;gap:28px}
  .steps{grid-template-columns:repeat(2,1fr);gap:24px}
  .step::after{display:none}
  .faq-layout{grid-template-columns:1fr;gap:24px}
  .faq-aside{position:static}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .stat-row{grid-template-columns:repeat(2,1fr)}
  .page-head{padding:32px 28px 28px}
  .cta-band{flex-direction:column;align-items:flex-start;padding:36px 28px}
}
@media (max-width:767px){
  .shell{padding:0 16px}
  .section{padding:56px 0}
  .section-tight{padding:40px 0}
  .nav-wrap{padding:10px 0}
  .logo-text{font-size:15px}
  .logo-mark{width:34px;height:34px;font-size:16px}
  .guide-grid{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}
  .stat-row{grid-template-columns:1fr 1fr}
  .page-head{padding:26px 20px 24px;border-radius:20px}
  .page-head h1{font-size:24px}
  .sec-head{flex-direction:column;align-items:flex-start;gap:10px}
  .footer-grid{grid-template-columns:1fr;gap:24px;padding:40px 0 28px}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:6px;padding-bottom:96px}
  .body-pad{padding-bottom:0}
  .mobile-bar{
    display:flex;position:fixed;left:0;right:0;bottom:0;z-index:70;
    background:rgba(255,255,255,.98);
    border-top:1px solid var(--line);
    padding:10px 16px calc(10px + env(safe-area-inset-bottom));
    align-items:center;gap:12px;
    box-shadow:0 -8px 20px rgba(15,30,51,.08);
  }
  .mobile-bar .btn{width:100%;height:44px;font-size:14px}
  .mobile-bar .mb-text{font-size:12px;color:var(--ink-400);white-space:nowrap}
}
@media (max-width:520px){
  .cta-actions{width:100%}
  .cta-actions .btn{width:100%}
  .faq-item summary{font-size:15px;padding:16px}
  .faq-answer{padding:0 16px 18px;font-size:14px}
  .scene-item{padding:16px}
  .steps-wrap{padding:26px 20px}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important}
}

/* roulang page: category5 */
:root{
  --brand:#1B5FD0;
  --brand-dark:#1548A6;
  --brand-50:#EEF4FF;
  --brand-100:#D8E5FB;
  --accent:#FF7A3D;
  --accent-50:#FFF1E9;
  --accent-700:#C2410C;
  --teal:#0E9F8A;
  --teal-50:#E6F7F4;
  --ink-900:#0E1726;
  --ink-800:#1B2A40;
  --ink-700:#2A3A52;
  --ink-600:#45566E;
  --ink-400:#7A8AA0;
  --ink-300:#A9B6C6;
  --bg:#F5F7FA;
  --surface:#FFFFFF;
  --line:#E3E9F2;
  --r-sm:12px;
  --r-card:16px;
  --r-lg:24px;
  --pill:999px;
  --shadow-1:0 6px 18px rgba(15,30,51,.06);
  --shadow-2:0 14px 34px rgba(15,30,51,.12);
  --ease:cubic-bezier(.22,.61,.36,1);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
html body{
  margin:0;
  padding:0;
  background:var(--bg);
  color:var(--ink-600);
  font-family:-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button{font-family:inherit}
[hidden]{display:none !important}
.shell{width:100%;max-width:1280px;margin:0 auto;padding:0 24px}
.section{margin-top:96px}
.section-title{font-size:clamp(22px,2.4vw,28px);font-weight:700;color:var(--ink-900);letter-spacing:-.2px;margin:0}
.section-sub{font-size:15px;color:var(--ink-400);margin:8px 0 0}
:where(a,button,summary):focus-visible{outline:2px solid var(--brand);outline-offset:3px;border-radius:8px}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  padding:12px 0 8px;
  background:linear-gradient(180deg,rgba(245,247,250,.98) 60%,rgba(245,247,250,.82));
  transition:box-shadow .2s var(--ease);
}
.site-header.is-scrolled{box-shadow:0 10px 24px rgba(15,30,51,.06)}
.nav-card{
  display:flex;align-items:center;gap:16px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:20px;
  padding:10px 12px;
  box-shadow:var(--shadow-1);
  transition:box-shadow .2s var(--ease);
}
.site-header.is-scrolled .nav-card{box-shadow:var(--shadow-2)}
.logo{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}
.logo-mark{
  width:38px;height:38px;border-radius:var(--r-sm);
  background:var(--brand);color:#fff;
  display:grid;place-items:center;
  font-size:18px;font-weight:800;letter-spacing:-.4px;
  box-shadow:0 6px 14px rgba(27,95,208,.24);
}
.logo-text{font-size:18px;font-weight:700;color:var(--ink-900);letter-spacing:-.2px;white-space:nowrap}
.nav-links{display:flex;align-items:center;gap:6px;flex:1 1 auto;flex-wrap:wrap}
.nav-chip{
  position:relative;
  display:inline-flex;align-items:center;
  height:40px;padding:0 14px;
  border-radius:var(--r-sm);
  background:var(--brand-50);
  color:var(--ink-700);
  font-size:14px;font-weight:600;
  white-space:nowrap;
  box-shadow:inset 0 0 0 1px transparent;
  transition:background .18s var(--ease),color .18s var(--ease),box-shadow .18s var(--ease),transform .18s var(--ease);
}
.nav-chip:hover{background:#fff;color:var(--brand-dark);box-shadow:inset 0 0 0 1px var(--brand-100);transform:translateY(-1px)}
.nav-chip:active{transform:none}
.nav-chip.active{background:#fff;color:var(--brand-dark);box-shadow:inset 0 0 0 1px var(--brand-100)}
.nav-chip.active::before{
  content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:3px;height:18px;border-radius:2px;background:var(--brand);
}
.nav-cta{display:flex;align-items:center;gap:8px;margin-left:auto;flex:0 0 auto}
.nav-toggle{
  display:none;align-items:center;justify-content:center;
  width:42px;height:42px;border-radius:var(--r-sm);
  border:1px solid var(--line);background:#fff;cursor:pointer;
  transition:border-color .18s var(--ease),background .18s var(--ease);
}
.nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--ink-700);margin:2px auto;transition:transform .2s var(--ease),opacity .2s var(--ease)}
.nav-toggle:hover{border-color:var(--brand);background:var(--brand-50)}
.nav-toggle.is-open span:nth-child(1){transform:translateY(4px) rotate(45deg)}
.nav-toggle.is-open span:nth-child(2){opacity:0}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-4px) rotate(-45deg)}
.nav-drawer{
  margin-top:10px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:20px;
  padding:12px;
  box-shadow:var(--shadow-2);
}
.drawer-link{
  display:flex;align-items:center;
  min-height:48px;padding:0 14px;margin-bottom:6px;
  border-radius:var(--r-sm);
  background:var(--brand-50);
  color:var(--ink-700);font-size:15px;font-weight:600;
}
.drawer-link.active{background:#fff;color:var(--brand-dark);box-shadow:inset 0 0 0 1px var(--brand-100)}
.drawer-cta{width:100%;margin-top:8px}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;
  border-radius:var(--r-sm);
  border:1px solid transparent;
  font-size:15px;font-weight:600;
  cursor:pointer;
  transition:background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),box-shadow .18s var(--ease),transform .18s var(--ease);
}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 8px 18px rgba(27,95,208,.2)}
.btn-primary:hover{background:var(--brand-dark);transform:translateY(-1px);box-shadow:0 14px 26px rgba(27,95,208,.26)}
.btn-primary:active{transform:none;box-shadow:none}
.btn-ghost{background:#fff;border-color:var(--line);color:var(--ink-800)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand-dark);transform:translateY(-1px)}
.btn-ghost:active{transform:none}
.btn-sm{height:40px;padding:0 16px;font-size:14px}
.btn-light{background:#fff;color:var(--brand-dark)}
.btn-light:hover{background:var(--brand-50);transform:translateY(-1px)}
.link-more{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--brand);transition:color .18s var(--ease)}
.link-more svg{transition:transform .18s var(--ease)}
.link-more:hover{color:var(--brand-dark)}
.link-more:hover svg{transform:translateX(3px)}

/* ---------- Badges & crumbs ---------- */
.badge{display:inline-flex;align-items:center;height:22px;padding:0 8px;border-radius:6px;font-size:12px;font-weight:600;background:var(--brand-50);color:var(--brand-dark)}
.badge-official{background:var(--teal-50);color:#0B7F6E}
.badge-hot{background:var(--accent-50);color:var(--accent-700)}
.crumbs{display:flex;align-items:center;flex-wrap:wrap;gap:6px;font-size:13px;color:var(--ink-400)}
.crumbs a{color:var(--ink-400);transition:color .18s var(--ease)}
.crumbs a:hover{color:var(--brand)}
.crumbs .sep{color:var(--ink-300)}
.crumbs .current{color:var(--ink-700);font-weight:600}

/* ---------- Page head ---------- */
.page-head{
  margin-top:8px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  box-shadow:var(--shadow-1);
  padding:32px;
  display:grid;
  grid-template-columns:minmax(0,1.4fr) minmax(0,.85fr);
  gap:32px;
  align-items:center;
}
.page-head-main{min-width:0}
.page-head .badge{margin-top:0}
.page-title{
  font-size:clamp(26px,3.2vw,40px);
  line-height:1.25;
  font-weight:700;
  letter-spacing:-.3px;
  color:var(--ink-900);
  margin:16px 0 0;
}
.page-lead{font-size:16px;line-height:1.85;color:var(--ink-600);margin:14px 0 0;max-width:52ch}
.chip-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:22px}
.chip{
  display:inline-flex;align-items:center;gap:6px;
  height:34px;padding:0 14px;border-radius:var(--pill);
  background:var(--brand-50);color:var(--brand-dark);
  font-size:13px;font-weight:600;
  transition:background .18s var(--ease),color .18s var(--ease),box-shadow .18s var(--ease);
}
.chip:hover{background:var(--brand);color:#fff;box-shadow:0 8px 16px rgba(27,95,208,.22)}
.page-head-media{position:relative}
.head-figure{
  position:relative;overflow:hidden;border-radius:var(--r-card);
  aspect-ratio:4/3;background:#DCE4EF;border:1px solid var(--line);
}
.head-figure img{width:100%;height:100%;object-fit:cover;transition:transform .5s var(--ease)}
.page-head-media:hover .head-figure img{transform:scale(1.03)}
.head-note{
  position:absolute;left:14px;bottom:14px;
  background:rgba(255,255,255,.96);
  border:1px solid var(--line);
  border-radius:var(--r-sm);
  padding:10px 14px;
  box-shadow:var(--shadow-1);
  font-size:13px;font-weight:600;color:var(--ink-800);
  display:flex;align-items:center;gap:8px;
}
.dot{width:7px;height:7px;border-radius:50%;background:var(--teal);flex:0 0 auto}

/* ---------- Stats ---------- */
.stat-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}
.stat-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:22px;box-shadow:var(--shadow-1);
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease);
}
.stat-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:var(--brand-100)}
.stat-num{font-size:30px;font-weight:800;color:var(--ink-900);letter-spacing:-.5px;line-height:1.2}
.stat-num em{font-size:14px;font-style:normal;font-weight:600;color:var(--ink-400);margin-left:4px}
.stat-label{font-size:13px;color:var(--ink-400);margin-top:6px}

/* ---------- FAQ layout ---------- */
.faq-layout{display:grid;grid-template-columns:minmax(0,5fr) minmax(0,7fr);gap:24px;align-items:start}
.faq-side{position:sticky;top:104px;display:grid;gap:16px}
.side-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:24px;box-shadow:var(--shadow-1);
}
.side-title{display:flex;align-items:center;gap:10px;font-size:15px;font-weight:700;color:var(--ink-900);margin:0 0 16px}
.side-title::before{content:"";width:3px;height:16px;border-radius:2px;background:var(--brand)}
.side-nav{display:grid;gap:6px}
.side-link{
  display:flex;align-items:center;gap:10px;
  min-height:44px;padding:0 14px;
  border-radius:var(--r-sm);
  font-size:14px;font-weight:600;color:var(--ink-700);
  background:transparent;
  transition:background .18s var(--ease),color .18s var(--ease),box-shadow .18s var(--ease);
}
.side-link .idx{font-size:12px;font-weight:700;color:var(--ink-300);min-width:20px}
.side-link:hover{background:var(--brand-50);color:var(--brand-dark)}
.side-link.current{background:var(--brand-50);color:var(--brand-dark);box-shadow:inset 3px 0 0 var(--brand)}
.side-link.current .idx{color:var(--brand)}
.side-tip{font-size:13px;line-height:1.8;color:var(--ink-400);margin:0}
.side-cta{
  background:var(--brand-50);border:1px solid var(--brand-100);border-radius:var(--r-lg);
  padding:22px;
}
.side-cta h3{font-size:15px;font-weight:700;color:var(--ink-900);margin:0 0 8px}
.side-cta p{font-size:13px;line-height:1.8;color:var(--ink-600);margin:0 0 16px}

.faq-main{display:grid;gap:20px;min-width:0}
.faq-group{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:6px 24px 14px;box-shadow:var(--shadow-1);
  scroll-margin-top:112px;
}
.group-head{display:flex;align-items:center;gap:10px;padding:20px 0 6px}
.group-head::before{content:"";width:3px;height:18px;border-radius:2px;background:var(--brand)}
.group-title{font-size:19px;font-weight:700;color:var(--ink-900);margin:0;letter-spacing:-.2px}
.group-count{margin-left:auto;font-size:12px;font-weight:600;color:var(--ink-400);background:var(--bg);border-radius:var(--pill);padding:3px 10px}
.group-desc{font-size:13px;color:var(--ink-400);margin:0 0 8px;line-height:1.8}
.faq-item{border-top:1px solid var(--line)}
.faq-q{
  display:flex;align-items:flex-start;gap:12px;
  padding:17px 0;
  font-size:16px;font-weight:600;line-height:1.6;color:var(--ink-900);
  cursor:pointer;list-style:none;
  transition:color .18s var(--ease);
}
.faq-q::-webkit-details-marker{display:none}
.faq-q::after{
  content:"+";
  margin-left:auto;flex:0 0 auto;
  width:24px;height:24px;border-radius:8px;
  display:grid;place-items:center;
  font-size:16px;font-weight:600;line-height:1;
  color:var(--ink-400);background:var(--bg);
  transition:background .18s var(--ease),color .18s var(--ease),transform .2s var(--ease);
}
.faq-q:hover{color:var(--brand-dark)}
.faq-q:hover::after{background:var(--brand-50);color:var(--brand)}
details[open] > .faq-q{color:var(--brand-dark)}
details[open] > .faq-q::after{content:"−";background:var(--brand);color:#fff}
.faq-a{padding:0 34px 20px 0;font-size:15px;line-height:1.85;color:var(--ink-600)}
.faq-a strong{color:var(--ink-800);font-weight:600}

/* ---------- Steps ---------- */
.step-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;margin-top:28px}
.step-card{
  position:relative;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:24px;box-shadow:var(--shadow-1);
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease);
}
.step-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:var(--brand-100)}
.step-num{
  width:34px;height:34px;border-radius:50%;
  background:var(--brand);color:#fff;
  display:grid;place-items:center;
  font-size:14px;font-weight:700;
  box-shadow:0 8px 16px rgba(27,95,208,.22);
}
.step-card h3{font-size:16px;font-weight:700;color:var(--ink-900);margin:16px 0 8px}
.step-card p{font-size:14px;line-height:1.8;color:var(--ink-600);margin:0}
.step-line{
  position:absolute;right:-14px;top:40px;width:28px;height:0;
  border-top:1px dashed var(--brand-100);
}
.step-card:last-child .step-line{display:none}

/* ---------- Support ---------- */
.support-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;margin-top:28px}
.support-card{
  display:flex;flex-direction:column;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:28px;box-shadow:var(--shadow-1);
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease);
}
.support-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:var(--brand-100)}
.support-icon{
  width:44px;height:44px;border-radius:var(--r-sm);
  background:var(--brand-50);color:var(--brand);
  display:grid;place-items:center;
}
.support-card h3{font-size:18px;font-weight:700;color:var(--ink-900);margin:18px 0 8px}
.support-card p{font-size:14px;line-height:1.85;color:var(--ink-600);margin:0 0 18px}
.support-card .link-more{margin-top:auto}

/* ---------- CTA band ---------- */
.cta-band{
  margin-top:96px;
  position:relative;overflow:hidden;
  background:var(--brand-dark);
  border-radius:var(--r-lg);
  padding:44px 40px;
  display:flex;align-items:center;justify-content:space-between;gap:32px;
  color:#fff;
}
.cta-band::after{
  content:"";position:absolute;right:-80px;top:-80px;width:320px;height:320px;border-radius:50%;
  background:radial-gradient(circle at center,rgba(255,255,255,.16),rgba(255,255,255,0) 70%);
  pointer-events:none;
}
.cta-band h2{font-size:clamp(20px,2.4vw,26px);font-weight:700;margin:0;letter-spacing:-.2px}
.cta-band p{font-size:14px;line-height:1.8;color:rgba(255,255,255,.78);margin:10px 0 0;max-width:52ch}
.cta-actions{display:flex;gap:12px;flex:0 0 auto;position:relative;z-index:1}

/* ---------- Footer ---------- */
.site-footer{
  margin-top:96px;
  background:#EDF2F8;
  border-top:1px solid var(--line);
  padding-top:56px;
}
.footer-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1.2fr;gap:32px}
.footer-text{font-size:14px;line-height:1.85;color:var(--ink-600);margin:16px 0 0;max-width:360px}
.footer-title{font-size:14px;font-weight:700;color:var(--ink-900);margin:0 0 14px}
.footer-link{display:block;font-size:14px;color:var(--ink-600);padding:5px 0;transition:color .18s var(--ease),transform .18s var(--ease)}
.footer-link:hover{color:var(--brand);transform:translateX(2px)}
.footer-info{font-size:13px;line-height:1.8;color:var(--ink-400);margin:0 0 8px}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  border-top:1px solid var(--line);
  margin-top:40px;padding:20px 0 28px;
  font-size:13px;color:var(--ink-400);
}

/* ---------- Mobile bar ---------- */
.mobile-bar{display:none}

/* ---------- Responsive ---------- */
@media (max-width:1180px){
  .nav-links{gap:4px}
  .nav-chip{padding:0 11px;font-size:13px}
}
@media (max-width:1024px){
  .page-head{grid-template-columns:1fr;padding:28px}
  .page-head-media{order:-1}
  .head-figure{aspect-ratio:16/9}
  .faq-layout{grid-template-columns:1fr}
  .faq-side{position:static}
  .stat-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:1fr 1fr}
  .cta-band{flex-direction:column;align-items:flex-start;padding:36px 28px}
}
@media (max-width:900px){
  .nav-links{display:none}
  .nav-cta .btn{display:none}
  .nav-toggle{display:inline-flex}
  .nav-card{padding:8px 10px}
}
@media (max-width:768px){
  .shell{padding:0 16px}
  .section{margin-top:56px}
  .page-head{padding:22px;border-radius:20px}
  .page-title{margin-top:14px}
  .stat-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
  .stat-card{padding:18px}
  .stat-num{font-size:24px}
  .step-grid{grid-template-columns:1fr;gap:14px}
  .step-line{display:none}
  .support-grid{grid-template-columns:1fr}
  .faq-group{padding:4px 18px 10px}
  .faq-q{font-size:15px;padding:15px 0}
  .faq-a{padding-right:8px}
  .cta-band{margin-top:56px;padding:28px 22px;border-radius:20px}
  .cta-actions{width:100%;flex-direction:column}
  .cta-actions .btn{width:100%}
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px}
  .mobile-bar{
    display:flex;align-items:center;gap:12px;
    position:fixed;left:0;right:0;bottom:0;z-index:70;
    background:rgba(255,255,255,.98);
    border-top:1px solid var(--line);
    padding:8px 16px calc(8px + env(safe-area-inset-bottom));
    box-shadow:0 -8px 20px rgba(15,30,51,.08);
  }
  .mobile-bar .btn{width:100%}
  html body{padding-bottom:76px}
}
@media (max-width:520px){
  .logo-text{font-size:16px}
  .logo-mark{width:34px;height:34px;border-radius:10px;font-size:16px}
  .page-lead{font-size:15px}
  .stat-grid{grid-template-columns:1fr}
  .head-note{left:10px;bottom:10px;font-size:12px;padding:8px 10px}
}
@media (prefers-reduced-motion:reduce){
  *{transition-duration:.01ms !important;animation-duration:.01ms !important;scroll-behavior:auto !important}
}