/* roulang page: index */
:root{
  --br-primary:#FF4B23;
  --br-primary-dark:#D93A16;
  --br-accent:#C8FF3D;
  --br-ink:#121316;
  --br-slate:#2A2D33;
  --br-bg:#F7F7F5;
  --br-surface:#FFFFFF;
  --br-line:#E4E4E1;
  --br-line-dark:rgba(255,255,255,.12);
  --br-text:#17181B;
  --br-muted:#5C6068;
  --br-text-dark:#F2F2F0;
  --br-muted-dark:#A8ACB3;
  --br-r-lg:16px;
  --br-r-md:12px;
  --br-r-sm:10px;
  --br-r-pill:999px;
  --br-shadow-1:0 1px 2px rgba(18,19,22,.06);
  --br-shadow-2:0 12px 32px rgba(18,19,22,.14);
  --br-gap:24px;
  --br-section:104px;
  --br-ease:cubic-bezier(.2,.7,.2,1);
  --br-dur:.28s;
  --br-mono:"SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--br-bg);
  color:var(--br-text);
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Source Han Sans SC","Noto Sans CJK SC","Microsoft YaHei",sans-serif;
  font-size:16px;
  line-height:1.9;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto;border:0;}
a{color:inherit;text-decoration:none;transition:color var(--br-dur) var(--br-ease);}
a:hover{color:var(--br-primary);}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
button{font-family:inherit;font-size:inherit;cursor:pointer;border:0;background:none;color:inherit;}
input{font-family:inherit;font-size:inherit;}
:focus-visible{outline:2px solid var(--br-primary);outline-offset:2px;border-radius:4px;}
.container{width:100%;max-width:1280px;margin:0 auto;padding:0 48px;}
.br-sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;}

/* ---------- header ---------- */
.br-header{position:sticky;top:0;z-index:80;background:rgba(18,19,22,.96);border-bottom:1px solid var(--br-line-dark);transition:box-shadow var(--br-dur) var(--br-ease);}
.br-header.is-scrolled{box-shadow:0 10px 30px rgba(18,19,22,.28);}
.br-brandbar__inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:70px;}
.br-logo{display:inline-flex;align-items:baseline;font-weight:800;letter-spacing:-.01em;font-size:24px;line-height:1;color:#fff;}
.br-logo__main{color:#fff;}
.br-logo__sub{color:var(--br-primary);}
.br-logo:hover{color:#fff;}
.br-logo:hover .br-logo__sub{color:var(--br-accent);}
.br-tools{display:flex;align-items:center;gap:12px;}
.br-search{display:flex;align-items:center;gap:8px;background:rgba(255,255,255,.07);border:1px solid var(--br-line-dark);border-radius:var(--br-r-pill);padding:4px 4px 4px 16px;transition:border-color var(--br-dur) var(--br-ease);}
.br-search:focus-within{border-color:var(--br-primary);box-shadow:0 0 0 3px rgba(255,75,35,.16);}
.br-search input{width:170px;margin:0;height:32px;border:0;background:transparent;color:var(--br-text-dark);padding:0;box-shadow:none;}
.br-search input::placeholder{color:var(--br-muted-dark);}
.br-search input:focus{outline:none;}
.br-search button{height:32px;padding:0 16px;border-radius:var(--br-r-pill);background:rgba(255,255,255,.12);color:#fff;font-size:13px;letter-spacing:.06em;}
.br-search button:hover{background:var(--br-primary);}
.br-menu-btn{display:none;height:38px;padding:0 16px;border-radius:var(--br-r-pill);border:1px solid var(--br-line-dark);color:var(--br-text-dark);font-size:14px;}

/* ---------- channel bar ---------- */
.br-channelbar{border-top:1px solid var(--br-line-dark);}
.br-channelbar__inner{display:flex;align-items:center;gap:16px;}
.br-channels{display:flex;align-items:center;gap:6px;overflow-x:auto;scrollbar-width:none;}
.br-channels::-webkit-scrollbar{display:none;}
.br-channels__item{position:relative;display:inline-block;padding:14px 14px 13px;font-size:15px;color:var(--br-muted-dark);white-space:nowrap;}
.br-channels__item::after{content:"";position:absolute;left:14px;right:14px;bottom:8px;height:1px;background:transparent;transition:background var(--br-dur) var(--br-ease);}
.br-channels__item:hover{color:#fff;}
.br-channels__item:hover::after{background:rgba(255,255,255,.35);}
.br-channels__item.is-active{color:#fff;font-weight:700;}
.br-channels__item.is-active::after{height:2px;background:var(--br-primary);}

/* ---------- buttons ---------- */
.br-btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:var(--br-r-pill);padding:0 26px;height:48px;font-size:15px;font-weight:700;letter-spacing:.02em;transition:transform var(--br-dur) var(--br-ease),background var(--br-dur) var(--br-ease),border-color var(--br-dur) var(--br-ease),color var(--br-dur) var(--br-ease);}
.br-btn--sm{height:38px;padding:0 18px;font-size:14px;}
.br-btn--primary{background:var(--br-primary);color:#fff;box-shadow:0 1px 2px rgba(18,19,22,.14);}
.br-btn--primary:hover{background:var(--br-primary-dark);color:#fff;transform:translateY(-1px);}
.br-btn--ghost{background:transparent;border:1px solid rgba(255,255,255,.5);color:#fff;}
.br-btn--ghost:hover{border-color:var(--br-primary);color:var(--br-primary);transform:translateY(-1px);}
.br-btn--light{background:#fff;color:var(--br-ink);}
.br-btn--light:hover{background:#fff;color:var(--br-primary-dark);transform:translateY(-1px);}

/* ---------- tags / badges ---------- */
.br-tag{display:inline-flex;align-items:center;height:26px;padding:0 10px;border-radius:6px;font-size:12px;letter-spacing:.06em;background:rgba(255,255,255,.12);color:var(--br-text-dark);}
.br-tag--orange{background:var(--br-primary);color:#fff;}
.br-badge{display:inline-flex;align-items:center;height:24px;padding:0 9px;border-radius:6px;font-size:12px;letter-spacing:.06em;background:rgba(255,75,35,.1);color:var(--br-primary-dark);}
.br-badge--solid{background:var(--br-primary);color:#fff;}

/* ---------- hero ---------- */
.br-hero{position:relative;overflow:hidden;background:var(--br-ink);min-height:78vh;display:flex;align-items:center;}
.br-hero__bg{position:absolute;inset:0;background-image:url('/assets/images/backpic/back-1.png');background-size:cover;background-position:center;transform:scale(1.04);animation:br-hero-zoom 9s var(--br-ease) forwards;}
@keyframes br-hero-zoom{from{transform:scale(1.06);}to{transform:scale(1);}}
.br-hero::before{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(18,19,22,.9) 0%,rgba(18,19,22,.62) 42%,rgba(18,19,22,.05) 100%);}
.br-hero::after{content:"";position:absolute;left:0;right:0;bottom:0;height:34%;background:linear-gradient(180deg,rgba(18,19,22,0) 0%,rgba(18,19,22,.85) 100%);}
.br-hero__inner{position:relative;z-index:2;padding-top:70px;padding-bottom:90px;}
.br-hero__text{max-width:660px;}
.br-hero__tags{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:20px;opacity:0;animation:br-line-in .6s var(--br-ease) .05s forwards;}
.br-hero__title{font-size:clamp(30px,5.6vw,64px);font-weight:900;line-height:1.08;letter-spacing:-.02em;color:#fff;opacity:0;animation:br-line-in .6s var(--br-ease) .11s forwards;}
.br-hero__lead{margin-top:22px;font-size:clamp(16px,1.5vw,20px);line-height:1.85;color:var(--br-muted-dark);max-width:560px;opacity:0;animation:br-line-in .6s var(--br-ease) .17s forwards;}
.br-hero__actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px;opacity:0;animation:br-line-in .6s var(--br-ease) .23s forwards;}
.br-hero__facts{display:flex;flex-wrap:wrap;gap:10px 28px;margin-top:36px;padding-top:24px;border-top:1px solid var(--br-line-dark);opacity:0;animation:br-line-in .6s var(--br-ease) .29s forwards;}
.br-hero__facts li{font-size:13px;color:var(--br-muted-dark);display:flex;align-items:center;gap:8px;}
.br-hero__facts li::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--br-accent);}
@keyframes br-line-in{from{opacity:0;transform:translateY(14px);}to{opacity:1;transform:translateY(0);}}
.br-hero__rail{position:absolute;right:48px;bottom:56px;z-index:3;display:flex;gap:14px;}
.br-rail-card{width:170px;border-radius:var(--br-r-md);overflow:hidden;border:1px solid rgba(255,255,255,.28);background:var(--br-slate);transition:transform var(--br-dur) var(--br-ease),border-color var(--br-dur) var(--br-ease);}
.br-rail-card:hover{transform:translateY(-4px);border-color:var(--br-primary);}
.br-rail-card img{width:100%;aspect-ratio:3/4;object-fit:cover;}
.br-rail-card span{display:block;padding:10px 12px;font-size:12px;letter-spacing:.06em;color:var(--br-text-dark);background:rgba(18,19,22,.86);}

/* ---------- section ---------- */
.br-section{padding:var(--br-section) 0;}
.br-section--tight{padding:72px 0;}
.br-section__head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:38px;}
.br-section__title{position:relative;padding-left:16px;font-size:clamp(22px,2.6vw,34px);font-weight:800;line-height:1.2;letter-spacing:-.01em;}
.br-section__title::before{content:"";position:absolute;left:0;top:.22em;width:4px;height:24px;border-radius:2px;background:var(--br-primary);}
.br-section__desc{margin-top:10px;padding-left:16px;font-size:15px;color:var(--br-muted);max-width:640px;}
.br-section__more{font-size:14px;color:var(--br-muted);white-space:nowrap;display:inline-flex;align-items:center;gap:6px;}
.br-section__more::after{content:"→";transition:transform var(--br-dur) var(--br-ease);}
.br-section__more:hover{color:var(--br-primary);}
.br-section__more:hover::after{transform:translateX(4px);}
.br-num{font-family:var(--br-mono);font-size:12px;letter-spacing:.16em;color:var(--br-muted);}

/* ---------- scroller ---------- */
.br-scroller{position:relative;}
.br-scroller__track{display:flex;gap:var(--br-gap);overflow-x:auto;scroll-snap-type:x mandatory;padding:6px 2px 22px;scrollbar-width:none;}
.br-scroller__track::-webkit-scrollbar{display:none;}
.br-scroller__track > *{scroll-snap-align:start;flex:0 0 calc((100% - var(--br-gap) * 4) / 5);}
.br-scroller__nav{display:flex;gap:10px;}
.br-scroller__btn{width:44px;height:44px;border-radius:50%;border:1px solid var(--br-line);background:#fff;color:var(--br-ink);display:inline-flex;align-items:center;justify-content:center;font-size:16px;transition:border-color var(--br-dur) var(--br-ease),color var(--br-dur) var(--br-ease),box-shadow var(--br-dur) var(--br-ease);}
.br-scroller__btn:hover{border-color:var(--br-primary);color:var(--br-primary);box-shadow:var(--br-shadow-1);}

/* ---------- poster card ---------- */
.br-poster{position:relative;display:block;border-radius:var(--br-r-md);overflow:hidden;background:var(--br-surface);box-shadow:var(--br-shadow-1);transition:transform var(--br-dur) var(--br-ease),box-shadow var(--br-dur) var(--br-ease);}
.br-poster:hover{transform:translateY(-4px);box-shadow:var(--br-shadow-2);}
.br-poster:focus-visible{outline:2px solid var(--br-primary);outline-offset:3px;}
.br-poster__media{position:relative;aspect-ratio:2/3;overflow:hidden;background:var(--br-line);}
.br-poster__media img{width:100%;height:100%;object-fit:cover;transition:transform .35s var(--br-ease);}
.br-poster:hover .br-poster__media img{transform:scale(1.04);}
.br-poster__badge{position:absolute;top:10px;left:10px;z-index:2;}
.br-poster__veil{position:absolute;inset:auto 0 0 0;padding:26px 12px 12px;background:linear-gradient(180deg,rgba(18,19,22,0) 0%,rgba(18,19,22,.88) 100%);opacity:0;transition:opacity var(--br-dur) var(--br-ease);}
.br-poster:hover .br-poster__veil{opacity:1;}
.br-poster__veil span{font-size:12px;letter-spacing:.06em;color:var(--br-text-dark);}
.br-poster__body{padding:14px 14px 18px;}
.br-poster__title{font-size:16px;font-weight:700;line-height:1.4;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.br-poster__meta{margin-top:8px;font-size:12px;letter-spacing:.06em;color:var(--br-muted);}

/* ---------- perks ---------- */
.br-perks{display:grid;grid-template-columns:repeat(4,1fr);gap:var(--br-gap);}
.br-perk{background:var(--br-surface);border:1px solid var(--br-line);border-radius:var(--br-r-lg);padding:30px 26px 32px;transition:transform var(--br-dur) var(--br-ease),box-shadow var(--br-dur) var(--br-ease);}
.br-perk:hover{transform:translateY(-3px);box-shadow:var(--br-shadow-2);}
.br-perk__ico{display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;border-radius:var(--br-r-sm);background:rgba(255,75,35,.1);color:var(--br-primary-dark);font-weight:800;font-family:var(--br-mono);font-size:15px;margin-bottom:18px;}
.br-perk h3{font-size:17px;font-weight:700;line-height:1.4;}
.br-perk p{margin-top:10px;font-size:14px;line-height:1.85;color:var(--br-muted);}

/* ---------- feature grid ---------- */
.br-feature-grid{display:grid;grid-template-columns:8fr 4fr;gap:var(--br-gap);}
.br-feature{position:relative;display:block;border-radius:var(--br-r-lg);overflow:hidden;background:var(--br-ink);min-height:100%;box-shadow:var(--br-shadow-1);transition:transform var(--br-dur) var(--br-ease),box-shadow var(--br-dur) var(--br-ease);}
.br-feature:hover{transform:translateY(-3px);box-shadow:var(--br-shadow-2);}
.br-feature img{width:100%;height:100%;min-height:420px;object-fit:cover;transition:transform .35s var(--br-ease);}
.br-feature:hover img{transform:scale(1.04);}
.br-feature__body{position:absolute;inset:auto 0 0 0;padding:60px 32px 30px;background:linear-gradient(180deg,rgba(18,19,22,0) 0%,rgba(18,19,22,.9) 100%);}
.br-feature__body h3{font-size:clamp(20px,2vw,26px);font-weight:800;color:#fff;line-height:1.3;}
.br-feature__body p{margin-top:10px;font-size:14px;color:var(--br-muted-dark);}
.br-mini-stack{display:flex;flex-direction:column;gap:var(--br-gap);}
.br-mini{display:flex;gap:16px;background:var(--br-surface);border:1px solid var(--br-line);border-radius:var(--br-r-md);overflow:hidden;box-shadow:var(--br-shadow-1);transition:transform var(--br-dur) var(--br-ease),box-shadow var(--br-dur) var(--br-ease);flex:1;}
.br-mini:hover{transform:translateY(-3px);box-shadow:var(--br-shadow-2);}
.br-mini__media{flex:0 0 40%;overflow:hidden;background:var(--br-line);}
.br-mini__media img{width:100%;height:100%;object-fit:cover;transition:transform .35s var(--br-ease);}
.br-mini:hover .br-mini__media img{transform:scale(1.04);}
.br-mini__body{padding:18px 20px 18px 0;display:flex;flex-direction:column;justify-content:center;gap:8px;}
.br-mini__body h3{font-size:16px;font-weight:700;line-height:1.4;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.br-mini__body p{font-size:13px;line-height:1.8;color:var(--br-muted);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.br-mini__meta{font-size:12px;letter-spacing:.06em;color:var(--br-muted);}

/* ---------- news list ---------- */
.br-news{background:var(--br-surface);border:1px solid var(--br-line);border-radius:var(--br-r-lg);padding:10px 30px;min-height:220px;}
.br-news__list{display:flex;flex-direction:column;}
.br-news__item{border-bottom:1px solid var(--br-line);}
.br-news__item:last-child{border-bottom:0;}
.br-news__link{display:grid;grid-template-columns:1fr auto;gap:12px 28px;align-items:center;padding:22px 0;transition:padding-left var(--br-dur) var(--br-ease);}
.br-news__link:hover{padding-left:8px;}
.br-news__head{display:flex;align-items:center;gap:12px;flex-wrap:wrap;}
.br-news__title{font-size:17px;font-weight:700;line-height:1.45;}
.br-news__link:hover .br-news__title{color:var(--br-primary);}
.br-news__summary{margin-top:8px;font-size:14px;line-height:1.8;color:var(--br-muted);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.br-news__meta{font-size:12px;letter-spacing:.06em;color:var(--br-muted);white-space:nowrap;font-family:var(--br-mono);}
.br-empty{padding:56px 20px;text-align:center;}
.br-empty__ico{width:56px;height:56px;margin:0 auto 18px;border-radius:50%;border:1px dashed var(--br-line);display:flex;align-items:center;justify-content:center;color:var(--br-muted);font-size:20px;}
.br-empty p{color:var(--br-muted);font-size:15px;}
.br-empty .br-btn{margin-top:20px;}
.br-skeleton{height:64px;border-radius:var(--br-r-sm);background:linear-gradient(90deg,#EFEFEC 25%,#F7F7F5 37%,#EFEFEC 63%);background-size:400% 100%;animation:br-shimmer 1.4s ease infinite;margin:12px 0;}
@keyframes br-shimmer{0%{background-position:100% 50%;}100%{background-position:0 50%;}}

/* ---------- vertical sections ---------- */
.br-vertical{display:grid;grid-template-columns:96px 1fr;gap:32px;align-items:start;padding:34px 0;border-top:1px solid var(--br-line);}
.br-vertical:last-of-type{border-bottom:1px solid var(--br-line);}
.br-vertical__label{writing-mode:vertical-rl;text-orientation:upright;letter-spacing:.28em;font-size:13px;font-weight:700;color:var(--br-muted);}
.br-vertical__label i{display:block;width:4px;height:34px;margin-top:16px;background:var(--br-primary);border-radius:2px;font-style:normal;}
.br-hcard{flex:0 0 calc((100% - var(--br-gap) * 2) / 3);}

/* ---------- stats ---------- */
.br-stats{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--br-line);border-bottom:1px solid var(--br-line);}
.br-stat{padding:38px 26px;border-right:1px solid var(--br-line);}
.br-stat:last-child{border-right:0;}
.br-stat__num{font-family:var(--br-mono);font-size:clamp(30px,3.4vw,44px);font-weight:700;line-height:1;letter-spacing:-.02em;color:var(--br-ink);}
.br-stat__num em{font-style:normal;font-size:.5em;color:var(--br-primary);margin-left:4px;}
.br-stat__label{margin-top:12px;font-size:13px;letter-spacing:.06em;color:var(--br-muted);}

/* ---------- faq ---------- */
.br-faq{border-top:1px solid var(--br-line);max-width:900px;}
.br-faq__item{border-bottom:1px solid var(--br-line);}
.br-faq__q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;padding:24px 0;text-align:left;font-size:16px;font-weight:700;line-height:1.5;color:var(--br-text);}
.br-faq__q:hover{color:var(--br-primary);}
.br-faq__sign{flex:0 0 auto;width:26px;height:26px;border-radius:50%;border:1px solid var(--br-line);display:inline-flex;align-items:center;justify-content:center;font-size:14px;font-weight:400;color:var(--br-muted);transition:transform var(--br-dur) var(--br-ease),color var(--br-dur) var(--br-ease),border-color var(--br-dur) var(--br-ease);}
.br-faq__item.is-open .br-faq__sign{color:var(--br-primary);border-color:var(--br-primary);transform:rotate(90deg);}
.br-faq__a{max-height:0;overflow:hidden;transition:max-height .3s var(--br-ease);}
.br-faq__a p{padding:0 60px 26px 0;font-size:15px;line-height:1.9;color:var(--br-muted);}

/* ---------- cta ---------- */
.br-cta{background:var(--br-ink);color:var(--br-text-dark);padding:72px 0;position:relative;overflow:hidden;}
.br-cta::before{content:"";position:absolute;inset:0;background-image:repeating-linear-gradient(135deg,rgba(255,255,255,.04) 0 1px,transparent 1px 14px);}
.br-cta__inner{position:relative;display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;}
.br-cta h2{font-size:clamp(22px,2.6vw,32px);font-weight:800;line-height:1.25;max-width:18ch;color:#fff;}
.br-cta__side{display:flex;align-items:center;gap:22px;flex-wrap:wrap;}
.br-cta__link{font-size:14px;color:var(--br-muted-dark);border-bottom:1px solid transparent;transition:color var(--br-dur) var(--br-ease),border-color var(--br-dur) var(--br-ease);}
.br-cta__link:hover{color:var(--br-accent);border-color:var(--br-accent);}

/* ---------- footer ---------- */
.br-footer{background:var(--br-ink);color:var(--br-text-dark);padding:78px 0 0;}
.br-footer__grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.4fr;gap:48px;padding-bottom:56px;}
.br-footer__title{font-size:13px;letter-spacing:.08em;color:var(--br-muted-dark);margin-bottom:20px;}
.br-footer__desc{margin-top:18px;font-size:14px;line-height:1.9;color:var(--br-muted-dark);max-width:34ch;}
.br-footer__links li{margin-bottom:12px;}
.br-footer__links a{font-size:14px;color:var(--br-muted-dark);display:inline-block;transition:color var(--br-dur) var(--br-ease),transform var(--br-dur) var(--br-ease);}
.br-footer__links a:hover{color:var(--br-primary);transform:translateX(2px);}
.br-footer__social{display:flex;gap:10px;margin-top:22px;flex-wrap:wrap;}
.br-footer__social a{font-size:12px;letter-spacing:.06em;padding:6px 12px;border-radius:6px;border:1px solid var(--br-line-dark);color:var(--br-muted-dark);}
.br-footer__social a:hover{color:var(--br-primary);border-color:var(--br-primary);}
.br-sub{display:flex;gap:10px;margin-top:6px;}
.br-sub input{flex:1;height:46px;padding:0 16px;margin:0;border-radius:var(--br-r-sm);border:1px solid var(--br-line-dark);background:rgba(255,255,255,.06);color:var(--br-text-dark);box-shadow:none;}
.br-sub input::placeholder{color:var(--br-muted-dark);}
.br-sub input:focus{outline:none;border-color:var(--br-primary);box-shadow:0 0 0 3px rgba(255,75,35,.15);}
.br-sub button{height:46px;padding:0 20px;border-radius:var(--br-r-sm);background:var(--br-primary);color:#fff;font-size:14px;font-weight:700;white-space:nowrap;transition:background var(--br-dur) var(--br-ease);}
.br-sub button:hover{background:var(--br-primary-dark);}
.br-sub__tip{margin-top:12px;font-size:12px;color:var(--br-muted-dark);}
.br-footer__bottom{border-top:1px solid var(--br-line-dark);padding:24px 0;display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13px;color:var(--br-muted-dark);}

/* ---------- to top ---------- */
.br-to-top{position:fixed;right:26px;bottom:26px;z-index:60;width:46px;height:46px;border-radius:50%;background:var(--br-ink);color:#fff;display:flex;align-items:center;justify-content:center;font-size:16px;box-shadow:var(--br-shadow-2);opacity:0;visibility:hidden;transform:translateY(10px);transition:opacity var(--br-dur) var(--br-ease),transform var(--br-dur) var(--br-ease),visibility var(--br-dur) var(--br-ease),background var(--br-dur) var(--br-ease);}
.br-to-top.is-visible{opacity:1;visibility:visible;transform:translateY(0);}
.br-to-top:hover{background:var(--br-primary);}

/* ---------- reveal ---------- */
.br-reveal{opacity:0;transform:translateY(12px);transition:opacity .5s var(--br-ease),transform .5s var(--br-ease);}
.br-reveal.is-in{opacity:1;transform:none;}

/* ---------- responsive ---------- */
@media (max-width:1024px){
  .container{padding:0 32px;}
  .br-section{padding:80px 0;}
  .br-scroller__track > *{flex:0 0 calc((100% - var(--br-gap) * 2) / 3.2);}
  .br-hcard{flex:0 0 calc((100% - var(--br-gap)) / 2.1);}
  .br-perks{grid-template-columns:repeat(2,1fr);}
  .br-feature-grid{grid-template-columns:1fr;}
  .br-feature img{min-height:340px;}
  .br-stats{grid-template-columns:repeat(2,1fr);}
  .br-stat:nth-child(2){border-right:0;}
  .br-stat:nth-child(1),.br-stat:nth-child(2){border-bottom:1px solid var(--br-line);}
  .br-footer__grid{grid-template-columns:1fr 1fr;gap:40px;}
  .br-hero__rail{display:none;}
  .br-hero{min-height:70vh;}
}
@media (max-width:768px){
  body{font-size:15px;}
  .container{padding:0 20px;}
  .br-section{padding:64px 0;}
  .br-search{display:none;}
  .br-menu-btn{display:inline-flex;align-items:center;}
  .br-channelbar{position:fixed;top:70px;left:0;right:0;z-index:79;background:rgba(18,19,22,.98);border-top:1px solid var(--br-line-dark);padding:12px 0;transform:translateY(-130%);transition:transform .3s var(--br-ease);max-height:calc(100vh - 70px);overflow-y:auto;}
  .br-channelbar.is-open{transform:translateY(0);box-shadow:0 20px 40px rgba(18,19,22,.35);}
  .br-channels{flex-direction:column;align-items:stretch;gap:0;overflow:visible;}
  .br-channels__item{padding:14px 20px;border-left:3px solid transparent;}
  .br-channels__item::after{display:none;}
  .br-channels__item.is-active{border-left-color:var(--br-primary);background:rgba(255,75,35,.08);}
  .br-hero{min-height:60vh;align-items:flex-end;}
  .br-hero__inner{padding-top:60px;padding-bottom:56px;}
  .br-hero::before{background:linear-gradient(180deg,rgba(18,19,22,.55) 0%,rgba(18,19,22,.92) 100%);}
  .br-hero__facts{gap:8px 18px;margin-top:26px;padding-top:18px;}
  .br-scroller__track > *{flex:0 0 72%;}
  .br-hcard{flex:0 0 82%;}
  .br-scroller__nav{display:none;}
  .br-perks{grid-template-columns:1fr;}
  .br-vertical{grid-template-columns:1fr;}
  .br-vertical__label{writing-mode:horizontal-tb;display:flex;align-items:center;gap:12px;letter-spacing:.16em;}
  .br-vertical__label i{margin-top:0;height:4px;width:34px;}
  .br-news{padding:6px 18px;}
  .br-news__link{grid-template-columns:1fr;gap:8px;}
  .br-news__meta{text-align:left;}
  .br-cta__inner{flex-direction:column;align-items:flex-start;}
  .br-footer__grid{grid-template-columns:1fr;gap:34px;}
  .br-faq__a p{padding-right:0;}
}
@media (max-width:520px){
  .br-brandbar__inner{height:62px;}
  .br-channelbar{top:62px;}
  .br-logo{font-size:20px;}
  .br-hero__actions .br-btn{width:100%;}
  .br-stats{grid-template-columns:1fr;}
  .br-stat{border-right:0;border-bottom:1px solid var(--br-line);}
  .br-stat:last-child{border-bottom:0;}
  .br-sub{flex-direction:column;}
  .br-sub button{width:100%;}
  .br-to-top{right:16px;bottom:16px;width:42px;height:42px;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition-duration:.01ms !important;}
  .br-reveal{transform:none;}
  .br-hero__bg{animation:none;transform:none;}
}

/* roulang page: article */
:root{
  --brand:#FF4B23;
  --brand-d:#D93A16;
  --lime:#C8FF3D;
  --ink:#121316;
  --slate:#2A2D33;
  --bg:#F7F7F5;
  --card:#FFFFFF;
  --line:#E4E4E1;
  --dline:rgba(255,255,255,.12);
  --text:#17181B;
  --muted:#5C6068;
  --dtext:#F2F2F0;
  --dmuted:#A8ACB3;
  --r-lg:16px;
  --r-md:12px;
  --r-sm:6px;
  --r-input:10px;
  --sh-1:0 1px 2px rgba(18,19,22,.06);
  --sh-2:0 12px 32px rgba(18,19,22,.14);
  --sec:96px;
  --sec-m:60px;
  --ease:cubic-bezier(.2,.7,.2,1);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"PingFang SC","Hiragino Sans GB","Source Han Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.9;
  letter-spacing:0;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0;}
a{color:inherit;text-decoration:none;transition:color .25s var(--ease),border-color .25s var(--ease),background-color .25s var(--ease),transform .25s var(--ease);}
a:hover{color:var(--brand);}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
button{font-family:inherit;}
input,button,textarea{font:inherit;color:inherit;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;}
br-sr,.br-sr{position:absolute!important;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;}
.container{width:100%;max-width:1280px;margin:0 auto;padding:0 48px;}
.br-sr{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0;}

/* ---------- 按钮 ---------- */
.br-btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:999px;border:1px solid transparent;font-weight:700;cursor:pointer;white-space:nowrap;transition:all .25s var(--ease);}
.br-btn--primary{background:var(--brand);color:#fff;padding:12px 26px;font-size:15px;}
.br-btn--primary:hover{background:var(--brand-d);color:#fff;transform:translateY(-1px);}
.br-btn--ghost{background:transparent;border-color:rgba(255,255,255,.55);color:#fff;padding:11px 24px;font-size:15px;}
.br-btn--ghost:hover{border-color:var(--brand);color:var(--brand);}
.br-btn--sm{padding:8px 18px;font-size:14px;}
.br-btn--line{background:transparent;border-color:var(--line);color:var(--text);padding:11px 24px;font-size:15px;}
.br-btn--line:hover{border-color:var(--brand);color:var(--brand);}
.br-textlink{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--muted);}
.br-textlink:hover{color:var(--brand);}
.br-textlink--arrow span{transition:transform .25s var(--ease);}
.br-textlink--arrow:hover span{transform:translateX(2px);}

/* ---------- 徽章 / 标签 ---------- */
.br-badge{display:inline-flex;align-items:center;border-radius:var(--r-sm);padding:2px 9px;font-size:12px;letter-spacing:.06em;font-weight:600;background:rgba(255,75,35,.1);color:var(--brand);}
.br-badge--solid{background:var(--brand);color:#fff;}
.br-badge--lime{background:rgba(200,255,61,.28);color:#4a5a00;}
.br-tag{display:inline-flex;align-items:center;border:1px solid var(--line);border-radius:999px;padding:6px 14px;font-size:13px;color:var(--muted);background:#fff;}
.br-tag:hover{border-color:var(--brand);color:var(--brand);}
.br-tag.is-on{background:var(--ink);border-color:var(--ink);color:#fff;}

/* ---------- 头部导航 ---------- */
.br-header{position:sticky;top:0;z-index:60;background:rgba(18,19,22,.94);border-bottom:1px solid var(--dline);transition:box-shadow .25s var(--ease),background-color .25s var(--ease);}
.br-header.is-scrolled{box-shadow:0 10px 30px rgba(0,0,0,.28);}
.br-brandbar__inner{display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:68px;}
.br-logo{display:inline-flex;align-items:baseline;font-weight:800;letter-spacing:-.01em;font-size:22px;line-height:1;}
.br-logo__main{color:#fff;}
.br-logo__sub{color:var(--brand);}
.br-tools{display:flex;align-items:center;gap:14px;}
.br-search{display:flex;align-items:center;background:rgba(255,255,255,.08);border:1px solid var(--dline);border-radius:var(--r-input);padding:4px 4px 4px 14px;}
.br-search input{width:200px;background:transparent;border:0;outline:none;color:var(--dtext);font-size:14px;padding:6px 0;}
.br-search input::placeholder{color:var(--dmuted);}
.br-search button{background:var(--brand);color:#fff;border:0;border-radius:8px;padding:7px 14px;font-size:13px;font-weight:700;cursor:pointer;}
.br-search button:hover{background:var(--brand-d);}
.br-menu-btn{display:none;background:transparent;border:1px solid var(--dline);color:var(--dtext);border-radius:999px;padding:8px 16px;font-size:14px;cursor:pointer;}
.br-menu-btn:hover{border-color:var(--brand);color:var(--brand);}
.br-channelbar{border-top:1px solid var(--dline);position:relative;}
.br-channelbar__inner{position:relative;overflow-x:auto;scrollbar-width:none;}
.br-channelbar__inner::-webkit-scrollbar{display:none;}
.br-channels{display:flex;align-items:center;gap:30px;min-height:46px;}
.br-channels__item{position:relative;display:inline-block;padding:12px 0;font-size:15px;color:var(--dmuted);white-space:nowrap;}
.br-channels__item:hover{color:#fff;}
.br-channels__item:hover::after{content:"";position:absolute;left:0;right:0;bottom:4px;height:1px;background:rgba(255,255,255,.35);}
.br-channels__item.is-active{color:#fff;font-weight:700;}
.br-channels__item.is-active::after{content:"";position:absolute;left:0;right:0;bottom:4px;height:2px;background:var(--brand);border-radius:2px;}

/* ---------- 文章横幅 ---------- */
.br-artbanner{position:relative;background:#0d0e11 url('/assets/images/coverpic/cover-5.webp') center/cover no-repeat;overflow:hidden;}
.br-artbanner::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(18,19,22,.92) 0%,rgba(18,19,22,.7) 52%,rgba(18,19,22,.42) 100%);}
.br-artbanner__inner{position:relative;z-index:2;padding:44px 0 40px;min-height:200px;display:flex;flex-direction:column;justify-content:center;}
.br-crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--dmuted);border-bottom:1px solid var(--dline);padding-bottom:14px;margin-bottom:22px;letter-spacing:.04em;}
.br-crumb a{color:var(--dmuted);}
.br-crumb a:hover{color:#fff;}
.br-crumb span.sep{opacity:.5;}
.br-crumb__cur{color:var(--dtext);font-weight:600;max-width:520px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.br-artbanner__label{display:inline-flex;align-items:center;gap:8px;font-size:12px;letter-spacing:.16em;color:var(--brand);font-weight:700;margin-bottom:14px;}
.br-artbanner__label::before{content:"";width:22px;height:2px;background:var(--brand);display:inline-block;}
.br-artbanner h1{font-size:clamp(28px,4vw,46px);font-weight:900;line-height:1.16;letter-spacing:-.02em;color:#fff;max-width:920px;}

/* ---------- 文章主体 ---------- */
.br-main{padding:56px 0 var(--sec);}
.br-artgrid{display:grid;grid-template-columns:minmax(0,8fr) minmax(0,4fr);gap:48px;align-items:start;}
.br-metabar{display:flex;flex-wrap:wrap;align-items:center;gap:10px 20px;font-size:14px;color:var(--muted);padding-bottom:22px;border-bottom:1px solid var(--line);margin-bottom:34px;}
.br-metabar__item{display:inline-flex;align-items:center;gap:7px;}
.br-metabar__dot{width:5px;height:5px;border-radius:50%;background:var(--brand);display:inline-block;}
.br-article{background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);padding:44px 48px;box-shadow:var(--sh-1);}
.br-prose{max-width:800px;font-size:17px;line-height:2;}
.br-prose p{margin:0 0 1.15em;color:#26282c;}
.br-prose > p:first-child{font-size:18px;color:var(--text);}
.br-prose h2{position:relative;font-size:clamp(21px,2.2vw,27px);font-weight:800;line-height:1.35;color:var(--text);margin:48px 0 18px;padding-left:16px;}
.br-prose h2::before{content:"";position:absolute;left:0;top:6px;width:4px;height:24px;border-radius:2px;background:var(--brand);}
.br-prose h3{font-size:18px;font-weight:700;line-height:1.5;margin:34px 0 12px;color:var(--text);}
.br-prose ul,.br-prose ol{margin:0 0 1.3em;padding-left:2px;}
.br-prose ul li,.br-prose ol li{position:relative;padding-left:22px;margin-bottom:10px;color:#33353a;line-height:1.9;}
.br-prose ul li::before{content:"";position:absolute;left:2px;top:.72em;width:8px;height:8px;border-radius:2px;background:var(--brand);opacity:.85;}
.br-prose ol{counter-reset:item;}
.br-prose ol li{counter-increment:item;}
.br-prose ol li::before{content:counter(item);position:absolute;left:0;top:.15em;width:20px;height:20px;border-radius:50%;background:rgba(255,75,35,.12);color:var(--brand);font-size:12px;font-weight:700;display:flex;align-items:center;justify-content:center;}
.br-prose blockquote{margin:28px 0;padding:18px 22px;border-left:3px solid var(--brand);background:#faf7f5;border-radius:0 var(--r-md) var(--r-md) 0;color:#3a3d43;font-size:16px;line-height:1.95;}
.br-prose blockquote p:last-child{margin-bottom:0;}
.br-prose img{border-radius:var(--r-md);margin:26px 0 8px;width:100%;height:auto;}
.br-prose figure{margin:26px 0;}
.br-prose figcaption{font-size:13px;color:var(--muted);text-align:center;line-height:1.8;}
.br-prose table{width:100%;border-collapse:collapse;margin:26px 0;font-size:15px;}
.br-prose th,.br-prose td{border:1px solid var(--line);padding:12px 14px;text-align:left;line-height:1.7;}
.br-prose th{background:#f4f3f0;font-weight:700;}
.br-prose a{color:var(--brand);border-bottom:1px solid rgba(255,75,35,.35);}
.br-prose a:hover{color:var(--brand-d);}
.br-prose strong{font-weight:700;}

/* ---------- 空态 ---------- */
.br-empty{text-align:center;padding:72px 24px;min-height:320px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:16px;}
.br-empty__icon{width:56px;height:56px;border-radius:50%;background:rgba(255,75,35,.1);display:flex;align-items:center;justify-content:center;color:var(--brand);font-size:24px;font-weight:800;}
.br-empty__title{font-size:20px;font-weight:800;}
.br-empty__desc{font-size:15px;color:var(--muted);max-width:420px;}

/* ---------- 侧栏 ---------- */
.br-side{display:flex;flex-direction:column;gap:24px;position:sticky;top:112px;}
.br-panel{background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);padding:26px 24px;box-shadow:var(--sh-1);}
.br-panel__title{font-size:15px;font-weight:800;letter-spacing:.02em;padding-bottom:14px;margin-bottom:14px;border-bottom:1px solid var(--line);}
.br-rank li{display:flex;gap:12px;padding:12px 0;border-bottom:1px solid var(--line);}
.br-rank li:last-child{border-bottom:0;padding-bottom:0;}
.br-rank__no{font-family:"SFMono-Regular",Consolas,monospace;font-size:14px;font-weight:700;color:var(--brand);min-width:22px;}
.br-rank__t{font-size:14px;line-height:1.6;font-weight:600;display:block;}
.br-rank__m{font-size:12px;color:var(--muted);letter-spacing:.04em;display:block;margin-top:4px;}
.br-sidecard{background:var(--ink);border-radius:var(--r-lg);padding:26px 24px;color:var(--dtext);position:relative;overflow:hidden;}
.br-sidecard::before{content:"";position:absolute;inset:0;background:repeating-linear-gradient(135deg,rgba(255,255,255,.05) 0 1px,transparent 1px 9px);opacity:.5;}
.br-sidecard__in{position:relative;z-index:2;}
.br-sidecard p{font-size:14px;line-height:1.85;color:var(--dmuted);margin:10px 0 18px;}
.br-sidecard .br-btn{width:100%;}

/* ---------- 相关内容 ---------- */
.br-related{margin-top:72px;}
.br-sectionhead{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;padding-bottom:18px;border-bottom:1px solid var(--line);margin-bottom:28px;}
.br-sectionhead h2{position:relative;font-size:clamp(21px,2.2vw,28px);font-weight:800;line-height:1.25;padding-left:16px;}
.br-sectionhead h2::before{content:"";position:absolute;left:0;top:5px;width:4px;height:22px;border-radius:2px;background:var(--brand);}
.br-sectionhead__no{font-family:"SFMono-Regular",Consolas,monospace;font-size:13px;color:var(--muted);letter-spacing:.1em;}
.br-cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
.br-card{display:flex;flex-direction:column;background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--sh-1);transition:transform .3s var(--ease),box-shadow .3s var(--ease);height:100%;}
.br-card:hover{transform:translateY(-3px);box-shadow:var(--sh-2);}
.br-card__media{position:relative;aspect-ratio:16/9;overflow:hidden;}
.br-card__media img{width:100%;height:100%;object-fit:cover;transition:transform .45s var(--ease);}
.br-card:hover .br-card__media img{transform:scale(1.04);}
.br-card__media .br-badge{position:absolute;left:12px;top:12px;background:rgba(18,19,22,.78);color:#fff;}
.br-card__body{padding:18px 20px 22px;display:flex;flex-direction:column;gap:8px;flex:1;}
.br-card__body h3{font-size:16px;font-weight:700;line-height:1.45;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.br-card__body p{font-size:14px;color:var(--muted);line-height:1.8;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.br-card__meta{font-size:12px;color:var(--muted);letter-spacing:.05em;margin-top:auto;padding-top:10px;border-top:1px solid var(--line);}

/* ---------- 上一篇 / 下一篇 ---------- */
.br-pager{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0;margin-top:40px;border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;background:var(--card);}
.br-pager__item{padding:22px 26px;display:flex;flex-direction:column;gap:8px;}
.br-pager__item + .br-pager__item{border-left:1px solid var(--line);}
.br-pager__label{font-size:12px;letter-spacing:.12em;color:var(--muted);}
.br-pager__t{font-size:15px;font-weight:700;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.br-pager__item--next{text-align:right;align-items:flex-end;}
.br-backlink{margin-top:32px;}

/* ---------- CTA 带 ---------- */
.br-cta{background:var(--ink);color:var(--dtext);padding:64px 0;position:relative;overflow:hidden;margin-top:var(--sec);}
.br-cta::before{content:"";position:absolute;inset:0;background:repeating-linear-gradient(135deg,rgba(255,255,255,.04) 0 1px,transparent 1px 10px);}
.br-cta__inner{position:relative;z-index:2;display:flex;align-items:center;justify-content:space-between;gap:32px;}
.br-cta h2{font-size:clamp(22px,2.4vw,30px);font-weight:800;line-height:1.3;max-width:560px;}
.br-cta p{font-size:15px;color:var(--dmuted);margin-top:12px;max-width:560px;}
.br-cta__actions{display:flex;align-items:center;gap:20px;flex-shrink:0;}

/* ---------- 页脚 ---------- */
.br-footer{background:var(--ink);color:var(--dmuted);padding:72px 0 0;border-top:1px solid var(--dline);}
.br-footer__grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:56px;}
.br-footer__title{font-size:13px;letter-spacing:.08em;color:#fff;font-weight:700;margin-bottom:18px;}
.br-footer__desc{font-size:14px;line-height:1.9;margin:16px 0 18px;max-width:320px;}
.br-footer__links li{margin-bottom:12px;}
.br-footer__links a{font-size:14px;color:var(--dmuted);}
.br-footer__links a:hover{color:var(--brand);transform:translateX(2px);display:inline-block;}
.br-footer__social{display:flex;gap:18px;flex-wrap:wrap;}
.br-footer__social a{font-size:13px;color:var(--dmuted);border-bottom:1px solid var(--dline);padding-bottom:2px;}
.br-footer__social a:hover{color:var(--brand);border-color:var(--brand);}
.br-sub{display:flex;gap:10px;background:rgba(255,255,255,.06);border:1px solid var(--dline);border-radius:var(--r-input);padding:6px 6px 6px 14px;}
.br-sub input{flex:1;min-width:0;background:transparent;border:0;outline:none;color:var(--dtext);font-size:14px;padding:8px 0;}
.br-sub input::placeholder{color:var(--dmuted);}
.br-sub button{background:var(--brand);color:#fff;border:0;border-radius:8px;padding:9px 16px;font-size:14px;font-weight:700;cursor:pointer;}
.br-sub button:hover{background:var(--brand-d);}
.br-sub__tip{font-size:12px;color:var(--dmuted);margin-top:12px;line-height:1.7;}
.br-footer__bottom{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;border-top:1px solid var(--dline);padding:22px 0 30px;font-size:13px;}

/* ---------- 返回顶部 ---------- */
.br-top{position:fixed;right:26px;bottom:26px;width:46px;height:46px;border-radius:50%;background:var(--brand);color:#fff;border:0;cursor:pointer;font-size:18px;display:flex;align-items:center;justify-content:center;opacity:0;pointer-events:none;transform:translateY(10px);transition:all .3s var(--ease);z-index:70;box-shadow:var(--sh-2);}
.br-top.is-on{opacity:1;pointer-events:auto;transform:translateY(0);}
.br-top:hover{background:var(--brand-d);}

/* ---------- 动效 ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .5s var(--ease),transform .5s var(--ease);}
.reveal.is-in{opacity:1;transform:none;}
@media (prefers-reduced-motion: reduce){
  *{transition-duration:.001ms!important;animation-duration:.001ms!important;}
  .reveal{transform:none;opacity:1;}
}

/* ---------- 响应式 ---------- */
@media (max-width:1180px){
  .br-artgrid{grid-template-columns:minmax(0,1fr);}
  .br-side{position:static;}
  .br-cards{grid-template-columns:repeat(2,minmax(0,1fr));}
}
@media (max-width:1024px){
  .container{padding:0 32px;}
  .br-search{display:none;}
  .br-menu-btn{display:inline-flex;align-items:center;}
  .br-channelbar{display:none;border-top:1px solid var(--dline);background:rgba(18,19,22,.98);}
  .br-channelbar.is-open{display:block;}
  .br-channels{flex-direction:column;align-items:stretch;gap:0;min-height:0;padding:8px 0 16px;}
  .br-channels li{border-bottom:1px solid var(--dline);}
  .br-channels li:last-child{border-bottom:0;}
  .br-channels__item{padding:14px 14px;border-left:3px solid transparent;}
  .br-channels__item:hover::after,.br-channels__item.is-active::after{display:none;}
  .br-channels__item.is-active{border-left-color:var(--brand);background:rgba(255,255,255,.04);}
  .br-article{padding:34px 30px;}
  .br-cta__inner{flex-direction:column;align-items:flex-start;}
}
@media (max-width:768px){
  :root{--sec:64px;}
  .container{padding:0 20px;}
  .br-main{padding:36px 0 64px;}
  .br-artbanner__inner{padding:32px 0 28px;min-height:0;}
  .br-artbanner h1{font-size:26px;}
  .br-crumb__cur{max-width:200px;}
  .br-metabar{gap:8px 16px;font-size:13px;padding-bottom:16px;margin-bottom:24px;}
  .br-article{padding:26px 20px;border-radius:var(--r-md);}
  .br-prose{font-size:16px;line-height:1.95;}
  .br-prose h2{margin-top:34px;}
  .br-cards{grid-template-columns:minmax(0,1fr);}
  .br-pager{grid-template-columns:minmax(0,1fr);}
  .br-pager__item + .br-pager__item{border-left:0;border-top:1px solid var(--line);}
  .br-pager__item--next{text-align:left;align-items:flex-start;}
  .br-cta{padding:48px 0;margin-top:64px;}
  .br-cta__actions{flex-wrap:wrap;gap:14px;}
  .br-footer{padding-top:52px;}
  .br-footer__grid{grid-template-columns:minmax(0,1fr);gap:32px;padding-bottom:36px;}
  .br-sub{flex-direction:column;padding:12px;}
  .br-sub button{width:100%;}
  .br-footer__bottom{flex-direction:column;align-items:flex-start;gap:8px;}
  .br-top{right:16px;bottom:16px;}
}
@media (max-width:520px){
  .br-brands__inner{gap:12px;}
  .br-logo{font-size:20px;}
  .br-btn--primary.br-btn--sm{padding:7px 14px;font-size:13px;}
  .br-artbanner h1{font-size:22px;line-height:1.3;}
  .br-sectionhead{flex-direction:column;align-items:flex-start;gap:10px;}
  .br-card__body h3{font-size:15px;}
}

/* roulang page: category1 */
:root{
  --c-primary:#FF4B23;
  --c-primary-dark:#D93A16;
  --c-accent:#C8FF3D;
  --c-ink:#121316;
  --c-slate:#2A2D33;
  --c-bg:#F7F7F5;
  --c-card:#FFFFFF;
  --c-line:#E4E4E1;
  --c-line-dark:rgba(255,255,255,.12);
  --c-text:#17181B;
  --c-muted:#5C6068;
  --c-dark-text:#F2F2F0;
  --c-dark-muted:#A8ACB3;
  --r-lg:16px;
  --r-md:12px;
  --r-sm:10px;
  --r-badge:6px;
  --sh-1:0 1px 2px rgba(18,19,22,.06);
  --sh-2:0 12px 32px rgba(18,19,22,.14);
  --ease:cubic-bezier(.2,.7,.2,1);
  --gap:24px;
}
*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--c-bg);
  color:var(--c-text);
  font-family:"PingFang SC","Hiragino Sans GB","Source Han Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Arial,sans-serif;
  font-size:16px;
  line-height:1.9;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;transition:color .25s var(--ease);}
button{font:inherit;cursor:pointer;border:0;background:none;}
input{font:inherit;}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;}
ul,ol{padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:3px;border-radius:4px;}
.br-sr{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0;}

/* ============ 容器 ============ */
.container{
  width:100%;
  max-width:1280px;
  margin:0 auto;
  padding:0 20px;
}
@media (min-width:768px){.container{padding:0 32px;}}
@media (min-width:1024px){.container{padding:0 48px;}}

/* ============ 顶部导航 ============ */
.br-header{
  position:sticky;
  top:0;
  z-index:80;
  background:var(--c-ink);
  border-bottom:1px solid var(--c-line-dark);
}
.br-brandbar__inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  min-height:70px;
}
.br-logo{
  display:inline-flex;
  align-items:baseline;
  font-size:24px;
  font-weight:800;
  letter-spacing:-.01em;
  line-height:1;
  white-space:nowrap;
}
.br-logo__main{color:#FFFFFF;}
.br-logo__sub{color:var(--c-primary);}
.br-tools{display:flex;align-items:center;gap:12px;}
.br-search{
  display:flex;
  align-items:center;
  gap:6px;
  background:rgba(255,255,255,.06);
  border:1px solid rgba(255,255,255,.14);
  border-radius:999px;
  padding:4px 4px 4px 16px;
  transition:border-color .25s var(--ease);
}
.br-search:focus-within{border-color:var(--c-primary);}
.br-search input{
  width:168px;
  border:0;
  background:transparent;
  color:var(--c-dark-text);
  font-size:14px;
  outline:none;
}
.br-search input::placeholder{color:#8A8E95;}
.br-search button{
  border-radius:999px;
  padding:8px 16px;
  font-size:14px;
  font-weight:700;
  background:var(--c-primary);
  color:#fff;
  transition:background .25s var(--ease);
}
.br-search button:hover{background:var(--c-primary-dark);}
.br-btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  border-radius:999px;
  font-weight:700;
  text-align:center;
  border:1px solid transparent;
  transition:all .25s var(--ease);
}
.br-btn--primary{background:var(--c-primary);color:#fff;}
.br-btn--primary:hover{background:var(--c-primary-dark);transform:translateY(-1px);}
.br-btn--ghost{border-color:rgba(255,255,255,.4);color:#fff;}
.br-btn--ghost:hover{border-color:var(--c-primary);color:var(--c-primary);}
.br-btn--light{background:#fff;color:var(--c-ink);}
.br-btn--light:hover{background:var(--c-accent);color:var(--c-ink);transform:translateY(-1px);}
.br-btn--sm{padding:9px 20px;font-size:14px;}
.br-btn--lg{padding:15px 34px;font-size:16px;}
.br-menu-btn{
  display:none;
  padding:9px 18px;
  border-radius:999px;
  font-size:14px;
  font-weight:600;
  color:var(--c-dark-text);
  background:rgba(255,255,255,.08);
  border:1px solid rgba(255,255,255,.16);
}
.br-channelbar{border-top:1px solid rgba(255,255,255,.08);}
.br-channelbar__inner{display:flex;align-items:center;}
.br-channels{
  display:flex;
  align-items:center;
  gap:4px;
  overflow-x:auto;
  scrollbar-width:none;
  -ms-overflow-style:none;
}
.br-channels::-webkit-scrollbar{display:none;}
.br-channels__item{
  display:block;
  padding:14px 16px;
  font-size:15px;
  color:var(--c-dark-muted);
  border-bottom:2px solid transparent;
  white-space:nowrap;
  transition:all .25s var(--ease);
}
.br-channels__item:hover{color:var(--c-primary);border-bottom-color:rgba(255,255,255,.2);}
.br-channels__item.is-active{
  color:#fff;
  font-weight:700;
  border-bottom-color:var(--c-primary);
}
@media (max-width:640px){
  .br-search{display:none;}
  .br-menu-btn{display:inline-flex;}
  .br-brandbar__inner{min-height:62px;}
  .br-logo{font-size:21px;}
  .br-channelbar{display:none;}
  .br-channelbar.is-open{display:block;}
  .br-channelbar.is-open .br-channels{flex-direction:column;align-items:stretch;padding:6px 0 10px;}
  .br-channelbar.is-open .br-channels__item{
    padding:12px 20px;
    border-bottom:0;
    border-left:3px solid transparent;
  }
  .br-channelbar.is-open .br-channels__item.is-active{
    color:#fff;
    border-left-color:var(--c-primary);
    background:rgba(255,255,255,.05);
  }
}

/* ============ 矮版频道 Hero ============ */
.cat-hero{
  position:relative;
  overflow:hidden;
  background:var(--c-ink);
  isolation:isolate;
}
.cat-hero__bg{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  object-fit:cover;
  opacity:.5;
  z-index:-2;
}
.cat-hero__scrim{
  position:absolute;
  inset:0;
  background:linear-gradient(96deg,rgba(18,19,22,.95) 0%,rgba(18,19,22,.78) 48%,rgba(18,19,22,.42) 100%);
  z-index:-1;
}
.cat-hero__inner{padding:34px 0 46px;}
@media (min-width:768px){.cat-hero__inner{padding:40px 0 52px;}}
@media (min-width:1024px){.cat-hero__inner{padding:46px 0 58px;}}

.crumbs{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:13px;
  letter-spacing:.04em;
  color:var(--c-dark-muted);
  padding-bottom:12px;
  margin-bottom:22px;
  border-bottom:1px solid var(--c-line-dark);
}
.crumbs a{color:var(--c-dark-muted);}
.crumbs a:hover{color:var(--c-primary);}
.crumbs .sep{color:rgba(255,255,255,.28);}
.crumbs [aria-current]{color:var(--c-dark-text);}
.cat-tag{
  display:inline-block;
  font-size:12px;
  letter-spacing:.06em;
  font-weight:600;
  padding:5px 12px;
  border-radius:var(--r-badge);
  background:rgba(255,75,35,.16);
  color:#FF8F73;
}
.cat-hero h1{
  font-size:clamp(28px,4.8vw,48px);
  font-weight:900;
  line-height:1.12;
  letter-spacing:-.02em;
  color:#fff;
  max-width:840px;
  margin:16px 0 14px;
}
.cat-hero__sub{
  max-width:720px;
  font-size:17px;
  line-height:1.85;
  color:var(--c-dark-muted);
}

/* ============ 筛选行 ============ */
.filterbar{
  display:flex;
  align-items:center;
  gap:10px;
  overflow-x:auto;
  padding:22px 0 20px;
  border-bottom:1px solid var(--c-line);
  scrollbar-width:none;
}
.filterbar::-webkit-scrollbar{display:none;}
.filter-chip{
  flex:0 0 auto;
  padding:9px 18px;
  border-radius:999px;
  border:1px solid var(--c-line);
  background:#fff;
  color:var(--c-muted);
  font-size:14px;
  font-weight:600;
  white-space:nowrap;
  transition:all .25s var(--ease);
}
.filter-chip:hover{border-color:var(--c-primary);color:var(--c-primary);}
.filter-chip.is-active{
  background:var(--c-ink);
  border-color:var(--c-ink);
  color:#fff;
}
.filterbar__note{
  margin-left:auto;
  font-size:13px;
  color:var(--c-muted);
  white-space:nowrap;
  letter-spacing:.04em;
}
@media (max-width:768px){.filterbar__note{display:none;}}

/* ============ 主体 8+4 分栏 ============ */
.split{
  display:grid;
  grid-template-columns:minmax(0,2.1fr) minmax(0,1fr);
  gap:44px;
  align-items:start;
  padding:44px 0 0;
}
@media (max-width:1024px){
  .split{grid-template-columns:1fr;gap:48px;}
}
.block-head{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  margin-bottom:24px;
}
.block-head h2{
  position:relative;
  padding-left:14px;
  font-size:clamp(20px,2.4vw,28px);
  font-weight:800;
  line-height:1.25;
  letter-spacing:-.01em;
}
.block-head h2::before{
  content:"";
  position:absolute;
  left:0;
  top:6px;
  width:4px;
  height:24px;
  border-radius:2px;
  background:var(--c-primary);
}
.block-head .count{
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-size:13px;
  letter-spacing:.06em;
  color:var(--c-muted);
}
.block-link{
  font-size:14px;
  font-weight:600;
  color:var(--c-muted);
  white-space:nowrap;
}
.block-link:hover{color:var(--c-primary);}

/* 海报卡网格 */
.film-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:var(--gap);
}
@media (max-width:1180px){.film-grid{grid-template-columns:repeat(2,minmax(0,1fr));}}
@media (max-width:520px){.film-grid{grid-template-columns:1fr;gap:20px;}}

.poster{
  display:block;
  transition:transform .3s var(--ease);
}
.poster:hover{transform:translateY(-3px);}
.poster__media{
  position:relative;
  aspect-ratio:2/3;
  border-radius:var(--r-md);
  overflow:hidden;
  background:var(--c-slate);
  box-shadow:var(--sh-1);
  transition:box-shadow .3s var(--ease);
}
.poster:hover .poster__media{box-shadow:var(--sh-2);}
.poster__img{
  width:100%;
  height:100%;
  object-fit:cover;
  transition:transform .35s var(--ease);
}
.poster:hover .poster__img{transform:scale(1.04);}
.poster__badge{
  position:absolute;
  top:10px;
  left:10px;
  z-index:2;
  font-size:12px;
  letter-spacing:.04em;
  font-weight:600;
  padding:4px 10px;
  border-radius:var(--r-badge);
  background:rgba(18,19,22,.82);
  color:#fff;
}
.poster__veil{
  position:absolute;
  left:0;right:0;bottom:0;
  height:52%;
  display:flex;
  align-items:flex-end;
  padding:14px;
  background:linear-gradient(to top,rgba(18,19,22,.88),rgba(18,19,22,0));
  opacity:0;
  transition:opacity .3s var(--ease);
}
.poster:hover .poster__veil{opacity:1;}
.poster__veil span{
  font-size:13px;
  font-weight:600;
  letter-spacing:.04em;
  color:#fff;
}
.poster__title{
  margin:12px 0 6px;
  font-size:17px;
  font-weight:700;
  line-height:1.45;
  transition:color .25s var(--ease);
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.poster:hover .poster__title{color:var(--c-primary);}
.poster__meta{
  font-size:12px;
  letter-spacing:.06em;
  color:var(--c-muted);
}
.poster__meta time{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;}

.load-more{display:flex;justify-content:center;margin-top:40px;}
.load-more button{
  padding:13px 40px;
  border-radius:999px;
  border:1px solid var(--c-line);
  background:#fff;
  color:var(--c-text);
  font-size:15px;
  font-weight:700;
  transition:all .25s var(--ease);
}
.load-more button:hover{
  border-color:var(--c-primary);
  color:var(--c-primary);
  transform:translateY(-1px);
}

/* 热门榜 */
.rank{
  background:var(--c-card);
  border:1px solid var(--c-line);
  border-radius:var(--r-lg);
  padding:24px 22px;
  box-shadow:var(--sh-1);
  position:sticky;
  top:96px;
}
@media (max-width:1024px){.rank{position:static;}}
.rank__title{
  display:flex;
  align-items:center;
  gap:10px;
  font-size:17px;
  font-weight:800;
  letter-spacing:-.01em;
  padding-bottom:14px;
  border-bottom:1px solid var(--c-line);
}
.rank__title i{color:var(--c-primary);font-size:15px;}
.rank__list{counter-reset:none;}
.rank__item{
  display:flex;
  gap:12px;
  padding:15px 0;
  border-bottom:1px solid var(--c-line);
}
.rank__item:last-child{border-bottom:0;padding-bottom:0;}
.rank__no{
  flex:0 0 auto;
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-size:15px;
  font-weight:700;
  color:var(--c-primary);
  line-height:1.6;
  min-width:20px;
}
.rank__body{min-width:0;}
.rank__name{
  font-size:15px;
  font-weight:600;
  line-height:1.55;
  transition:color .25s var(--ease);
}
.rank__item:hover .rank__name{color:var(--c-primary);}
.rank__time{
  display:block;
  margin-top:4px;
  font-size:12px;
  letter-spacing:.06em;
  color:var(--c-muted);
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
.rank__foot{margin-top:18px;}
.rank__foot a{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:14px;
  font-weight:700;
  color:var(--c-primary);
}
.rank__foot a i{transition:transform .25s var(--ease);}
.rank__foot a:hover i{transform:translateX(3px);}

/* ============ 要点提示条 ============ */
.notice{
  margin-top:56px;
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:0;
  border-top:1px solid var(--c-line);
  border-bottom:1px solid var(--c-line);
}
@media (max-width:900px){.notice{grid-template-columns:repeat(2,minmax(0,1fr));}}
@media (max-width:520px){.notice{grid-template-columns:1fr;}}
.notice__cell{
  padding:26px 22px;
  border-right:1px solid var(--c-line);
}
.notice__cell:last-child{border-right:0;}
@media (max-width:900px){
  .notice__cell:nth-child(2n){border-right:0;}
  .notice__cell{border-bottom:1px solid var(--c-line);}
  .notice__cell:nth-last-child(-n+2){border-bottom:0;}
}
@media (max-width:520px){
  .notice__cell{border-right:0;border-bottom:1px solid var(--c-line);}
  .notice__cell:last-child{border-bottom:0;}
}
.notice__num{
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-size:30px;
  font-weight:800;
  line-height:1.1;
  letter-spacing:-.02em;
  color:var(--c-text);
}
.notice__num em{
  font-style:normal;
  font-size:14px;
  color:var(--c-primary);
  margin-left:2px;
}
.notice__label{
  margin-top:6px;
  font-size:13px;
  letter-spacing:.06em;
  color:var(--c-muted);
}

/* ============ FAQ ============ */
.faq-block{padding:72px 0 0;}
.faq{border-top:1px solid var(--c-line);}
.faq__item{border-bottom:1px solid var(--c-line);}
.faq__q{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:22px 0;
  font-size:17px;
  font-weight:700;
  line-height:1.6;
  cursor:pointer;
  list-style:none;
  transition:color .25s var(--ease);
}
.faq__q::-webkit-details-marker{display:none;}
.faq__q:hover{color:var(--c-primary);}
.faq__icon{
  position:relative;
  flex:0 0 auto;
  width:22px;
  height:22px;
  color:var(--c-muted);
  transition:color .25s var(--ease);
}
.faq__icon::before,
.faq__icon::after{
  content:"";
  position:absolute;
  background:currentColor;
  border-radius:2px;
  transition:transform .3s var(--ease);
}
.faq__icon::before{left:0;top:10px;width:22px;height:2px;}
.faq__icon::after{left:10px;top:0;width:2px;height:22px;}
.faq__item[open] .faq__icon{color:var(--c-primary);}
.faq__item[open] .faq__icon::after{transform:scaleY(0);}
.faq__a{
  padding:0 0 24px;
  max-width:820px;
  font-size:16px;
  line-height:1.9;
  color:var(--c-muted);
}

/* ============ 底部 CTA ============ */
.endcap{
  margin-top:72px;
  background:var(--c-ink);
  color:var(--c-dark-text);
}
.endcap__inner{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  padding:62px 0;
}
.endcap__text h2{
  font-size:clamp(20px,2.6vw,30px);
  font-weight:800;
  line-height:1.3;
  letter-spacing:-.01em;
  color:#fff;
  margin-bottom:8px;
}
.endcap__text p{
  font-size:15px;
  color:var(--c-dark-muted);
  max-width:560px;
}
.endcap__actions{display:flex;align-items:center;gap:18px;flex-wrap:wrap;}
.endcap__actions .textlink{
  font-size:15px;
  font-weight:700;
  color:var(--c-dark-muted);
}
.endcap__actions .textlink:hover{color:var(--c-primary);}

/* ============ 页脚 ============ */
.br-footer{
  background:var(--c-ink);
  color:var(--c-dark-text);
  border-top:1px solid var(--c-line-dark);
  padding:64px 0 0;
}
.br-footer__grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1.2fr;
  gap:40px;
  padding-bottom:48px;
}
@media (max-width:1024px){.br-footer__grid{grid-template-columns:1fr 1fr;gap:36px;}}
@media (max-width:560px){.br-footer__grid{grid-template-columns:1fr;gap:32px;}}
.br-footer__desc{
  margin-top:16px;
  font-size:14px;
  line-height:1.9;
  color:var(--c-dark-muted);
  max-width:320px;
}
.br-footer__social{display:flex;flex-wrap:wrap;gap:16px;margin-top:18px;}
.br-footer__social a{font-size:14px;color:var(--c-dark-muted);}
.br-footer__social a:hover{color:var(--c-primary);}
.br-footer__title{
  font-size:13px;
  letter-spacing:.08em;
  color:#7C8189;
  margin-bottom:16px;
  font-weight:700;
}
.br-footer__links li{margin-bottom:11px;}
.br-footer__links a{
  font-size:14px;
  color:#C9CDD3;
  transition:all .25s var(--ease);
  display:inline-block;
}
.br-footer__links a:hover{color:var(--c-primary);transform:translateX(2px);}
.br-sub{display:flex;gap:8px;}
.br-sub input{
  flex:1 1 auto;
  min-width:0;
  padding:11px 14px;
  border-radius:var(--r-sm);
  border:1px solid rgba(255,255,255,.16);
  background:rgba(255,255,255,.06);
  color:var(--c-dark-text);
  font-size:14px;
  outline:none;
  transition:border-color .25s var(--ease),box-shadow .25s var(--ease);
}
.br-sub input::placeholder{color:#8A8E95;}
.br-sub input:focus{
  border-color:var(--c-primary);
  box-shadow:0 0 0 3px rgba(255,75,35,.15);
}
.br-sub button{
  flex:0 0 auto;
  padding:11px 20px;
  border-radius:var(--r-sm);
  background:var(--c-primary);
  color:#fff;
  font-size:14px;
  font-weight:700;
  transition:background .25s var(--ease);
}
.br-sub button:hover{background:var(--c-primary-dark);}
.br-sub__tip{
  margin-top:12px;
  font-size:13px;
  line-height:1.8;
  color:#7C8189;
}
.br-footer__bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding:22px 0;
  border-top:1px solid var(--c-line-dark);
  font-size:13px;
  color:#7C8189;
}
@media (max-width:640px){
  .br-sub{flex-direction:column;}
  .br-sub button{width:100%;}
}

/* ============ 返回顶部 ============ */
.to-top{
  position:fixed;
  right:22px;
  bottom:26px;
  z-index:90;
  width:46px;
  height:46px;
  border-radius:50%;
  background:var(--c-ink);
  color:#fff;
  font-size:18px;
  display:flex;
  align-items:center;
  justify-content:center;
  box-shadow:var(--sh-2);
  opacity:0;
  pointer-events:none;
  transform:translateY(8px);
  transition:all .3s var(--ease);
}
.to-top.is-show{opacity:1;pointer-events:auto;transform:none;}
.to-top:hover{background:var(--c-primary);}

/* ============ 入场动效 ============ */
.reveal{
  opacity:0;
  transform:translateY(12px);
  transition:opacity .55s var(--ease),transform .55s var(--ease);
}
.reveal.is-in{opacity:1;transform:none;}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  .reveal{transform:none;transition:opacity .3s linear;}
  .poster,.poster__img,.br-btn,.to-top{transition:none;}
  .poster:hover{transform:none;}
  .poster:hover .poster__img{transform:none;}
}

/* roulang page: category2 */
:root{
  --c-primary:#FF4B23;
  --c-primary-dark:#D93A16;
  --c-accent:#C8FF3D;
  --c-ink:#121316;
  --c-slate:#2A2D33;
  --c-bg:#F7F7F5;
  --c-card:#FFFFFF;
  --c-line:#E4E4E1;
  --c-line-dark:rgba(255,255,255,.12);
  --c-text:#17181B;
  --c-muted:#5C6068;
  --c-dark-text:#F2F2F0;
  --c-dark-muted:#A8ACB3;
  --r-lg:16px;
  --r-md:12px;
  --r-sm:6px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(18,19,22,.06);
  --sh-2:0 12px 32px rgba(18,19,22,.14);
  --gap:24px;
  --sp-section:96px;
  --ease:cubic-bezier(.2,.7,.2,1);
}
*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--c-bg);
  color:var(--c-text);
  font-family:"PingFang SC","Hiragino Sans GB","Source Han Sans SC","Noto Sans CJK SC","Microsoft YaHei",Helvetica,Arial,sans-serif;
  font-size:16px;
  line-height:1.9;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto;}
a{color:inherit;text-decoration:none;}
ul,ol{margin:0;padding:0;list-style:none;}
button,input{font:inherit;color:inherit;}
button{cursor:pointer;border:0;background:none;padding:0;}
h1,h2,h3,h4,p{margin:0;}
h1{font-size:clamp(30px,4.4vw,52px);font-weight:900;line-height:1.1;letter-spacing:-.02em;}
h2{font-size:clamp(22px,2.6vw,32px);font-weight:800;line-height:1.2;letter-spacing:-.01em;}
h3{font-size:17px;font-weight:700;line-height:1.45;}
a:focus-visible,button:focus-visible,input:focus-visible{outline:2px solid var(--c-primary);outline-offset:3px;border-radius:4px;}
.br-sr{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0;}
.container{width:100%;max-width:1280px;margin:0 auto;padding:0 48px;}
.br-kicker{font-size:12px;letter-spacing:.08em;color:var(--c-muted);text-transform:uppercase;}

/* ---------- 导航 ---------- */
.br-header{
  position:fixed;top:0;left:0;right:0;z-index:60;
  background:transparent;
  border-bottom:1px solid transparent;
  transition:background .25s var(--ease),border-color .25s var(--ease);
}
.br-header.is-stuck{
  background:rgba(18,19,22,.92);
  border-bottom:1px solid var(--c-line-dark);
  backdrop-filter:saturate(140%) blur(6px);
}
.br-brandbar__inner{display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:66px;}
.br-logo{display:inline-flex;align-items:baseline;font-weight:800;letter-spacing:-.01em;font-size:22px;line-height:1;}
.br-logo__main{color:#FFFFFF;}
.br-logo__sub{color:var(--c-primary);}
.br-tools{display:flex;align-items:center;gap:14px;}
.br-search{display:flex;align-items:center;background:rgba(255,255,255,.08);border:1px solid var(--c-line-dark);border-radius:var(--r-pill);padding:4px 4px 4px 16px;transition:border-color .25s var(--ease),background .25s var(--ease);}
.br-search:focus-within{border-color:var(--c-primary);background:rgba(255,255,255,.14);}
.br-search input{
  width:180px;background:transparent;border:0;outline:none;color:var(--c-dark-text);
  font-size:14px;padding:6px 0;
}
.br-search input::placeholder{color:var(--c-dark-muted);}
.br-search button{
  border-radius:var(--r-pill);background:rgba(255,255,255,.14);color:#fff;
  font-size:13px;padding:7px 16px;transition:background .25s var(--ease);
}
.br-search button:hover{background:var(--c-primary);}
.br-btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--r-pill);font-weight:700;font-size:15px;
  padding:12px 26px;border:1px solid transparent;
  transition:transform .25s var(--ease),background .25s var(--ease),color .25s var(--ease),border-color .25s var(--ease);
}
.br-btn--sm{padding:9px 20px;font-size:14px;}
.br-btn--primary{background:var(--c-primary);color:#fff;}
.br-btn--primary:hover{background:var(--c-primary-dark);transform:translateY(-1px);}
.br-btn--ghost{border-color:rgba(255,255,255,.5);color:#fff;}
.br-btn--ghost:hover{border-color:var(--c-primary);color:var(--c-primary);}
.br-btn--dark{background:var(--c-ink);color:#fff;}
.br-btn--dark:hover{background:var(--c-primary);transform:translateY(-1px);}
.br-menu-btn{
  display:none;border:1px solid var(--c-line-dark);border-radius:var(--r-pill);
  color:#fff;font-size:14px;padding:9px 16px;background:rgba(255,255,255,.08);
}
.br-channelbar{border-top:1px solid rgba(255,255,255,.08);}
.br-channelbar__inner{display:flex;align-items:center;min-height:50px;overflow:hidden;}
.br-channels{display:flex;align-items:center;gap:28px;}
.br-channels__item{
  position:relative;display:inline-block;padding:14px 0 13px;
  font-size:15px;color:var(--c-dark-muted);
  transition:color .25s var(--ease);
}
.br-channels__item::after{
  content:"";position:absolute;left:0;right:0;bottom:8px;height:1px;
  background:transparent;transition:background .25s var(--ease);
}
.br-channels__item:hover{color:var(--c-primary);}
.br-channels__item:hover::after{background:rgba(255,75,35,.5);}
.br-channels__item.is-active{color:#fff;font-weight:700;}
.br-channels__item.is-active::after{background:var(--c-primary);height:2px;bottom:6px;}

/* ---------- 分类 Hero ---------- */
.cat-hero{
  position:relative;isolation:isolate;overflow:hidden;
  padding:132px 0 44px;min-height:262px;
  background-image:url("/assets/images/backpic/back-2.webp");
  background-size:cover;background-position:center 30%;
}
.cat-hero::before{
  content:"";position:absolute;inset:0;z-index:-1;
  background:linear-gradient(96deg,rgba(18,19,22,.94) 0%,rgba(18,19,22,.78) 46%,rgba(18,19,22,.42) 100%),
             linear-gradient(0deg,rgba(18,19,22,.7) 0%,rgba(18,19,22,0) 58%);
}
.cat-hero__inner{max-width:760px;}
.cat-hero__tags{display:flex;flex-wrap:wrap;align-items:center;gap:12px;margin-bottom:16px;}
.tag{
  display:inline-block;border-radius:var(--r-sm);font-size:12px;letter-spacing:.06em;
  padding:4px 10px;background:rgba(255,255,255,.12);color:var(--c-dark-text);
}
.tag--accent{background:var(--c-accent);color:var(--c-ink);font-weight:700;}
.cat-hero h1{color:#fff;margin-bottom:14px;}
.cat-hero h1 .hl{color:var(--c-primary);}
.cat-hero__lead{color:var(--c-dark-muted);font-size:17px;max-width:640px;line-height:1.8;}
.cat-hero__actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px;}

/* ---------- 面包屑 ---------- */
.crumb{border-bottom:1px solid var(--c-line);padding:16px 0;}
.crumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:13px;color:var(--c-muted);}
.crumb li{display:flex;align-items:center;gap:10px;}
.crumb li+li::before{content:"/";color:var(--c-line);}
.crumb a{color:var(--c-muted);transition:color .25s var(--ease);}
.crumb a:hover{color:var(--c-primary);}
.crumb [aria-current="page"]{color:var(--c-text);font-weight:700;}

/* ---------- 筛选行 ---------- */
.filterbar{padding:26px 0 0;}
.filterbar__row{display:flex;flex-wrap:wrap;align-items:center;gap:12px;}
.chip{
  display:inline-flex;align-items:center;
  border:1px solid var(--c-line);border-radius:var(--r-pill);
  background:var(--c-card);color:var(--c-muted);
  font-size:14px;padding:8px 18px;
  transition:border-color .25s var(--ease),color .25s var(--ease),background .25s var(--ease),transform .25s var(--ease);
}
.chip:hover{border-color:var(--c-primary);color:var(--c-primary);transform:translateY(-1px);}
.chip.is-active{background:var(--c-primary);border-color:var(--c-primary);color:#fff;font-weight:700;}
.filterbar__note{margin-top:12px;font-size:13px;color:var(--c-muted);}

/* ---------- 置顶大图卡 ---------- */
.spotlight{margin-top:36px;}
.spot-card{
  position:relative;display:block;border-radius:var(--r-lg);overflow:hidden;
  box-shadow:var(--sh-1);transition:box-shadow .3s var(--ease),transform .3s var(--ease);
}
.spot-card:hover{box-shadow:var(--sh-2);transform:translateY(-3px);}
.spot-card__media{position:relative;aspect-ratio:16/9;background:#dfe0dd;}
.spot-card__media img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease);}
.spot-card:hover .spot-card__media img{transform:scale(1.04);}
.spot-card__media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(0deg,rgba(18,19,22,.88) 0%,rgba(18,19,22,.28) 46%,rgba(18,19,22,0) 78%);
}
.spot-card__body{position:absolute;left:0;right:0;bottom:0;padding:28px 32px;color:#fff;}
.spot-card__body h2{margin-top:10px;color:#fff;max-width:760px;}
.spot-card__body p{margin-top:10px;color:rgba(242,242,240,.82);font-size:15px;max-width:720px;}
.spot-card__meta{display:flex;flex-wrap:wrap;gap:14px;font-size:12px;letter-spacing:.06em;color:rgba(242,242,240,.72);margin-top:14px;}

/* ---------- 5+7 双栏文字流 ---------- */
.flow-wrap{margin-top:var(--sp-section);padding-bottom:var(--sp-section);}
.flow-grid{display:grid;grid-template-columns:minmax(0,5fr) minmax(0,7fr);gap:48px;align-items:start;}
.side-sticky{position:sticky;top:132px;}
.side-block{background:var(--c-card);border:1px solid var(--c-line);border-radius:var(--r-lg);padding:24px;box-shadow:var(--sh-1);}
.side-block+.side-block{margin-top:20px;}
.side-block__title{
  font-size:13px;letter-spacing:.08em;color:var(--c-muted);font-weight:700;margin-bottom:14px;
  display:flex;align-items:center;gap:10px;
}
.side-block__title::before{content:"";width:4px;height:16px;background:var(--c-primary);border-radius:2px;}
.side-tags{display:flex;flex-wrap:wrap;gap:8px;}
.side-tags a{
  border:1px solid var(--c-line);border-radius:var(--r-sm);
  font-size:13px;color:var(--c-muted);padding:6px 12px;background:#FCFCFB;
  transition:all .25s var(--ease);
}
.side-tags a:hover{border-color:var(--c-primary);color:var(--c-primary);}
.side-tags a.is-on{background:rgba(255,75,35,.1);border-color:rgba(255,75,35,.35);color:var(--c-primary-dark);font-weight:700;}
.stat-list{display:grid;gap:14px;}
.stat-list li{display:flex;align-items:baseline;justify-content:space-between;gap:12px;border-bottom:1px dashed var(--c-line);padding-bottom:12px;}
.stat-list li:last-child{border-bottom:0;padding-bottom:0;}
.stat-list .num{font-family:"SFMono-Regular",Menlo,Consolas,monospace;font-size:24px;font-weight:700;letter-spacing:-.02em;color:var(--c-text);}
.stat-list .num em{font-style:normal;font-size:13px;color:var(--c-muted);margin-left:2px;}
.stat-list .lab{font-size:13px;color:var(--c-muted);}
.side-note{font-size:13px;color:var(--c-muted);line-height:1.8;}

.flow-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;padding-bottom:16px;border-bottom:1px solid var(--c-line);}
.flow-head p{font-size:13px;color:var(--c-muted);}
.flow-head__link{font-size:14px;color:var(--c-primary);font-weight:700;white-space:nowrap;transition:transform .25s var(--ease);}
.flow-head__link:hover{transform:translateX(2px);}

.flow-list{margin-top:6px;}
.flow-item{border-bottom:1px solid var(--c-line);}
.flow-item > a{display:grid;grid-template-columns:96px minmax(0,1fr);gap:18px;padding:20px 4px;transition:background .25s var(--ease);}
.flow-item > a:hover{background:rgba(255,75,35,.045);}
.flow-item__thumb{width:96px;height:96px;border-radius:var(--r-md);overflow:hidden;background:#E9E9E6;box-shadow:var(--sh-1);}
.flow-item__thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease);}
.flow-item > a:hover .flow-item__thumb img{transform:scale(1.05);}
.flow-item__body h3{
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  background-image:linear-gradient(var(--c-primary),var(--c-primary));
  background-size:0% 1px;background-repeat:no-repeat;background-position:0 100%;
  transition:background-size .3s var(--ease),color .25s var(--ease);
}
.flow-item > a:hover .flow-item__body h3{color:var(--c-primary-dark);background-size:100% 1px;}
.flow-item__desc{
  margin-top:8px;font-size:14px;color:var(--c-muted);line-height:1.75;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.flow-item__meta{display:flex;flex-wrap:wrap;align-items:center;gap:12px;margin-top:12px;font-size:12px;letter-spacing:.06em;color:var(--c-muted);}
.flow-item__meta .badge{
  background:rgba(255,75,35,.1);color:var(--c-primary-dark);
  border-radius:var(--r-sm);padding:2px 9px;font-weight:700;
}
.flow-item__meta .dot{width:3px;height:3px;border-radius:50%;background:var(--c-line);}
.flow-more{display:flex;justify-content:center;margin-top:32px;}

/* ---------- 底部轻量 CTA ---------- */
.cat-cta{
  margin-top:0;background:var(--c-ink);border-radius:var(--r-lg);
  padding:56px 48px;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:24px;
  position:relative;overflow:hidden;
}
.cat-cta::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:repeating-linear-gradient(115deg,rgba(255,255,255,.04) 0 2px,transparent 2px 14px);
}
.cat-cta h2{color:#fff;position:relative;z-index:1;max-width:560px;}
.cat-cta p{color:var(--c-dark-muted);font-size:15px;margin-top:10px;position:relative;z-index:1;}
.cat-cta__actions{display:flex;flex-wrap:wrap;align-items:center;gap:18px;position:relative;z-index:1;}
.cat-cta__link{color:#fff;font-size:15px;border-bottom:1px solid rgba(255,255,255,.4);transition:color .25s var(--ease),border-color .25s var(--ease);}
.cat-cta__link:hover{color:var(--c-primary);border-color:var(--c-primary);}

/* ---------- 页脚 ---------- */
.br-footer{margin-top:var(--sp-section);background:var(--c-ink);color:var(--c-dark-text);padding:72px 0 28px;}
.br-footer__grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;}
.br-footer__col .br-logo{font-size:20px;margin-bottom:16px;}
.br-footer__desc{color:var(--c-dark-muted);font-size:14px;line-height:1.85;max-width:320px;}
.br-footer__social{display:flex;flex-wrap:wrap;gap:16px;margin-top:18px;}
.br-footer__social a{font-size:13px;color:var(--c-dark-muted);transition:color .25s var(--ease),transform .25s var(--ease);}
.br-footer__social a:hover{color:var(--c-primary);transform:translateX(2px);}
.br-footer__title{font-size:13px;letter-spacing:.08em;color:var(--c-dark-muted);font-weight:700;margin-bottom:16px;}
.br-footer__links li+li{margin-top:10px;}
.br-footer__links a{font-size:14px;color:rgba(242,242,240,.86);display:inline-block;transition:color .25s var(--ease),transform .25s var(--ease);}
.br-footer__links a:hover{color:var(--c-primary);transform:translateX(2px);}
.br-sub{display:flex;gap:10px;align-items:center;}
.br-sub input{
  flex:1;min-width:0;background:rgba(255,255,255,.06);border:1px solid var(--c-line-dark);
  border-radius:10px;padding:11px 14px;color:#fff;font-size:14px;outline:none;
  transition:border-color .25s var(--ease),box-shadow .25s var(--ease);
}
.br-sub input::placeholder{color:var(--c-dark-muted);}
.br-sub input:focus{border-color:var(--c-primary);box-shadow:0 0 0 3px rgba(255,75,35,.15);}
.br-sub button{
  background:var(--c-primary);color:#fff;font-weight:700;font-size:14px;
  border-radius:var(--r-pill);padding:11px 20px;white-space:nowrap;
  transition:background .25s var(--ease),transform .25s var(--ease);
}
.br-sub button:hover{background:var(--c-primary-dark);transform:translateY(-1px);}
.br-sub__tip{font-size:12px;color:var(--c-dark-muted);margin-top:12px;line-height:1.7;}
.br-footer__bottom{
  margin-top:48px;padding-top:22px;border-top:1px solid var(--c-line-dark);
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  font-size:13px;color:var(--c-dark-muted);
}

/* ---------- 返回顶部 ---------- */
#toTop{
  position:fixed;right:24px;bottom:28px;z-index:70;
  width:46px;height:46px;border-radius:50%;
  background:var(--c-ink);color:#fff;font-size:16px;
  display:flex;align-items:center;justify-content:center;
  box-shadow:var(--sh-2);opacity:0;visibility:hidden;
  transition:opacity .3s var(--ease),visibility .3s var(--ease),background .25s var(--ease),transform .25s var(--ease);
}
#toTop.is-on{opacity:1;visibility:visible;}
#toTop:hover{background:var(--c-primary);transform:translateY(-2px);}

/* ---------- 动效 ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .45s var(--ease),transform .45s var(--ease);}
.reveal.is-in{opacity:1;transform:none;}

/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  .container{padding:0 32px;}
  :root{--sp-section:76px;}
  .flow-grid{grid-template-columns:1fr;gap:32px;}
  .side-sticky{position:static;}
  .br-footer__grid{grid-template-columns:1fr 1fr;gap:32px;}
  .br-search input{width:130px;}
}
@media (max-width:768px){
  .br-menu-btn{display:inline-block;}
  .br-search{display:none;}
  .cat-hero{padding:120px 0 36px;min-height:230px;}
  .spot-card__body{padding:20px;}
  .cat-cta{padding:40px 24px;}
}
@media (max-width:640px){
  .container{padding:0 20px;}
  :root{--sp-section:60px;}
  .br-channelbar{
    position:fixed;top:0;left:0;bottom:0;width:78%;max-width:320px;
    background:var(--c-ink);border-right:1px solid var(--c-line-dark);
    padding:88px 20px 24px;transform:translateX(-102%);
    transition:transform .3s var(--ease);z-index:80;overflow-y:auto;
  }
  .br-channelbar.is-open{transform:none;}
  .br-channelbar__inner{display:block;min-height:0;}
  .br-channels{display:block;}
  .br-channels li+li{margin-top:6px;}
  .br-channels__item{display:block;padding:13px 14px;font-size:16px;border-radius:10px;}
  .br-channels__item::after{display:none;}
  .br-channels__item.is-active{background:rgba(255,75,35,.14);color:#fff;box-shadow:inset 3px 0 0 var(--c-primary);}
  .br-logo{font-size:20px;}
  .br-brandbar__inner{min-height:60px;}
  .cat-hero{padding:104px 0 32px;min-height:220px;}
  .cat-hero__lead{font-size:15px;}
  .cat-hero__actions .br-btn{width:100%;}
  .flow-item > a{grid-template-columns:76px minmax(0,1fr);gap:14px;padding:16px 2px;}
  .flow-item__thumb{width:76px;height:76px;}
  .flow-head{flex-direction:column;align-items:flex-start;gap:8px;}
  .cat-cta{flex-direction:column;align-items:flex-start;}
  .cat-cta__actions{width:100%;}
  .cat-cta__actions .br-btn{width:100%;}
  .br-footer{padding:56px 0 24px;}
  .br-footer__grid{grid-template-columns:1fr;}
  .br-sub{flex-direction:column;align-items:stretch;}
  .br-sub button{width:100%;}
  #toTop{right:16px;bottom:18px;}
  .filterbar__row{overflow-x:auto;flex-wrap:nowrap;padding-bottom:6px;}
  .chip{white-space:nowrap;}
}
@media (prefers-reduced-motion:reduce){
  *{transition-duration:.001ms !important;animation-duration:.001ms !important;}
  .reveal{transform:none !important;}
}

/* roulang page: category3 */
:root{
  --brand:#FF4B23;
  --brand-dark:#D93A16;
  --accent:#C8FF3D;
  --ink:#121316;
  --slate:#2A2D33;
  --page:#F7F7F5;
  --card:#FFFFFF;
  --line:#E4E4E1;
  --line-dark:rgba(255,255,255,.12);
  --text:#17181B;
  --text-2:#5C6068;
  --text-dark:#F2F2F0;
  --text-dark-2:#A8ACB3;
  --r-lg:16px;
  --r-md:12px;
  --r-sm:6px;
  --r-pill:999px;
  --r-field:10px;
  --sh-1:0 1px 2px rgba(18,19,22,.06);
  --sh-2:0 12px 32px rgba(18,19,22,.14);
  --sec:96px;
  --sec-sm:60px;
  --ease:cubic-bezier(.2,.7,.2,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","Hiragino Sans GB","Source Han Sans SC","Noto Sans CJK SC","Microsoft YaHei",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  background:var(--page);
  color:var(--text);
  font-size:16px;
  line-height:1.9;
  overflow-x:hidden;
}
img{max-width:100%;display:block;height:auto;border:0}
a{color:inherit;text-decoration:none;background:transparent}
a:hover,a:focus{color:inherit}
ul,ol{margin:0;padding:0;list-style:none}
button{font:inherit;cursor:pointer;background-image:none;border-radius:0}
input,button,select,textarea{font-family:inherit;font-size:inherit}
h1,h2,h3,h4,p{margin:0}
table{border-collapse:collapse}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
.button,.reveal,.callout{border-radius:0}
.foundation-default-override,.callout{border:0}
.container{width:100%;max-width:1280px;margin:0 auto;padding:0 20px}
.br-sr{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}

/* ---------- header ---------- */
.br-header{
  position:sticky;top:0;z-index:80;
  background:rgba(18,19,22,.94);
  backdrop-filter:blur(10px);
  color:var(--text-dark);
  border-bottom:1px solid var(--line-dark);
}
.br-brandbar__inner{display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:72px}
.br-logo{display:inline-flex;align-items:baseline;font-size:23px;font-weight:800;letter-spacing:-.01em;line-height:1.2}
.br-logo__main{color:#FFFFFF}
.br-logo__sub{color:var(--brand)}
.br-tools{display:flex;align-items:center;gap:14px}
.br-search{display:flex;align-items:center;gap:8px;background:rgba(255,255,255,.06);border:1px solid var(--line-dark);border-radius:var(--r-field);padding:4px 4px 4px 14px;transition:border-color .25s var(--ease),box-shadow .25s var(--ease)}
.br-search:focus-within{border-color:var(--brand);box-shadow:0 0 0 3px rgba(255,75,35,.18)}
.br-search input{
  width:190px;border:0;background:transparent;color:var(--text-dark);
  padding:8px 0;outline:none;font-size:14px;
}
.br-search input::placeholder{color:var(--text-dark-2)}
.br-search button{
  border:0;background:var(--brand);color:#fff;border-radius:8px;
  padding:8px 14px;font-size:13px;font-weight:700;letter-spacing:.04em;
  transition:background .25s var(--ease),transform .25s var(--ease);
}
.br-search button:hover{background:var(--brand-dark);transform:translateY(-1px)}
.br-btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border:1px solid transparent;border-radius:var(--r-pill);
  padding:12px 26px;font-size:15px;font-weight:700;line-height:1;
  transition:background .25s var(--ease),color .25s var(--ease),border-color .25s var(--ease),transform .25s var(--ease),box-shadow .25s var(--ease);
}
.br-btn--primary{background:var(--brand);color:#fff}
.br-btn--primary:hover{background:var(--brand-dark);color:#fff;transform:translateY(-1px)}
.br-btn--ghost{border-color:rgba(255,255,255,.5);color:#fff}
.br-btn--ghost:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-1px)}
.br-btn--ink{background:var(--ink);color:#fff}
.br-btn--ink:hover{background:#000;transform:translateY(-1px)}
.br-btn--sm{padding:10px 20px;font-size:14px}
.br-menu-btn{
  display:none;border:1px solid var(--line-dark);background:rgba(255,255,255,.06);
  color:var(--text-dark);border-radius:var(--r-pill);padding:10px 18px;font-size:14px;font-weight:600;
}
.br-channelbar{border-top:1px solid var(--line-dark)}
.br-channelbar__inner{position:relative}
.br-channels{display:flex;align-items:center;gap:30px;overflow-x:auto;scrollbar-width:none}
.br-channels::-webkit-scrollbar{display:none}
.br-channels__item{
  position:relative;display:inline-block;white-space:nowrap;
  padding:15px 2px;font-size:15px;color:var(--text-dark-2);font-weight:500;
  transition:color .25s var(--ease);
}
.br-channels__item::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:1px;background:transparent;
  transition:background .25s var(--ease);
}
.br-channels__item:hover{color:var(--brand)}
.br-channels__item:hover::after{background:rgba(255,75,35,.45)}
.br-channels__item.is-active{color:#fff;font-weight:800}
.br-channels__item.is-active::after{height:2px;background:var(--brand)}

/* ---------- page hero ---------- */
.br-pagehero{
  position:relative;display:flex;align-items:flex-end;
  min-height:260px;background:var(--ink);overflow:hidden;
}
.br-pagehero__bg{
  position:absolute;inset:0;
  background-image:url(/assets/images/backpic/back-2.webp);
  background-size:cover;background-position:center;
  opacity:.5;transform:scale(1.03);
}
.br-pagehero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(90deg,rgba(18,19,22,.92) 0%,rgba(18,19,22,.66) 48%,rgba(18,19,22,.32) 100%);
}
.br-pagehero__inner{position:relative;z-index:2;width:100%;padding:44px 20px 30px}
.br-crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-dark-2);letter-spacing:.04em;margin-bottom:14px}
.br-crumb a{color:var(--text-dark-2);transition:color .25s var(--ease)}
.br-crumb a:hover{color:var(--brand)}
.br-crumb span[aria-current]{color:#fff}
.br-crumb__sep{color:rgba(255,255,255,.32)}
.br-eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-size:12px;letter-spacing:.16em;color:var(--accent);
  text-transform:uppercase;margin-bottom:14px;
}
.br-eyebrow::before{content:"";display:block;width:22px;height:2px;background:var(--brand)}
.br-pagehero h1{
  font-size:clamp(28px,4.2vw,46px);font-weight:900;line-height:1.1;
  letter-spacing:-.02em;color:#fff;max-width:900px;
}
.br-pagehero p{
  margin-top:14px;max-width:640px;font-size:16px;line-height:1.85;color:var(--text-dark-2);
}

/* ---------- filter row ---------- */
.br-filterbar{border-bottom:1px solid var(--line);background:var(--page)}
.br-filter{display:flex;align-items:center;gap:10px;overflow-x:auto;padding:18px 0;scrollbar-width:none}
.br-filter::-webkit-scrollbar{display:none}
.br-chip{
  flex:0 0 auto;display:inline-block;white-space:nowrap;
  padding:9px 18px;border:1px solid var(--line);border-radius:var(--r-pill);
  background:#fff;font-size:14px;color:var(--text-2);font-weight:600;
  transition:color .25s var(--ease),border-color .25s var(--ease),background .25s var(--ease),transform .25s var(--ease);
}
.br-chip:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-1px)}
.br-chip.is-active{background:var(--brand);border-color:var(--brand);color:#fff}

/* ---------- stats ---------- */
.br-stats{
  display:grid;grid-template-columns:repeat(4,1fr);
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  background:var(--card);
}
.br-stats__item{padding:26px 24px;border-right:1px solid var(--line)}
.br-stats__item:last-child{border-right:0}
.br-stats__num{
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,"Courier New",monospace;
  font-size:clamp(26px,3vw,36px);font-weight:800;line-height:1.1;letter-spacing:-.02em;color:var(--ink);
}
.br-stats__num em{font-style:normal;color:var(--brand)}
.br-stats__bar{display:block;width:26px;height:3px;background:var(--accent);border-radius:2px;margin:12px 0 10px}
.br-stats__label{font-size:13px;color:var(--text-2);letter-spacing:.04em}

/* ---------- rail sections ---------- */
.br-section{padding:var(--sec) 0 0}
.br-section:last-of-type{padding-bottom:var(--sec)}
.br-rail-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;padding-bottom:22px;border-bottom:1px solid var(--line);margin-bottom:32px}
.br-rail-head__left{display:flex;align-items:baseline;gap:16px;min-width:0}
.br-rail-num{
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-size:13px;letter-spacing:.14em;color:var(--brand);font-weight:700;
}
.br-h2{
  position:relative;font-size:clamp(22px,2.6vw,32px);font-weight:800;line-height:1.2;
  letter-spacing:-.01em;padding-left:16px;
}
.br-h2::before{content:"";position:absolute;left:0;top:.28em;width:4px;height:24px;background:var(--brand);border-radius:2px}
.br-link{
  flex:0 0 auto;display:inline-flex;align-items:center;gap:6px;
  font-size:14px;font-weight:700;color:var(--text-2);
  transition:color .25s var(--ease);
}
.br-link::after{content:"→";transition:transform .25s var(--ease)}
.br-link:hover{color:var(--brand)}
.br-link:hover::after{transform:translateX(3px)}

.br-rail-layout{display:grid;grid-template-columns:92px minmax(0,1fr);gap:24px;align-items:start}
.br-rail-side{display:flex;flex-direction:column;align-items:center;gap:14px;padding-top:6px}
.br-rail-side__name{
  writing-mode:vertical-rl;text-orientation:mixed;
  font-size:13px;letter-spacing:.3em;color:var(--text-2);font-weight:600;
}
.br-rail-side__line{width:4px;height:38px;background:var(--brand);border-radius:2px}
.br-rail-body{position:relative;min-width:0}
.br-rail{
  display:flex;gap:20px;
  overflow-x:auto;scroll-snap-type:x mandatory;scroll-behavior:smooth;
  padding:4px 2px 18px;scrollbar-width:thin;
}
.br-rail::-webkit-scrollbar{height:6px}
.br-rail::-webkit-scrollbar-track{background:#EDEDEA;border-radius:3px}
.br-rail::-webkit-scrollbar-thumb{background:#D3D3CF;border-radius:3px}
.br-rail-arrow{
  position:absolute;top:38%;z-index:5;
  width:40px;height:40px;border-radius:50%;
  border:1px solid var(--line);background:#fff;color:var(--ink);
  font-size:16px;line-height:1;display:flex;align-items:center;justify-content:center;
  box-shadow:var(--sh-1);transition:background .25s var(--ease),color .25s var(--ease),transform .25s var(--ease),box-shadow .25s var(--ease);
}
.br-rail-arrow:hover{background:var(--brand);color:#fff;border-color:var(--brand);box-shadow:var(--sh-2);transform:translateY(-1px)}
.br-rail-arrow--prev{left:-18px}
.br-rail-arrow--next{right:-18px}

.br-hcard{flex:0 0 380px;scroll-snap-align:start;max-width:88vw}
.br-hcard__link{
  display:grid;grid-template-columns:40% minmax(0,1fr);gap:16px;height:100%;
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-md);
  overflow:hidden;box-shadow:var(--sh-1);
  transition:transform .28s var(--ease),box-shadow .28s var(--ease),border-color .28s var(--ease);
}
.br-hcard__link:hover,.br-hcard__link:focus-visible{
  transform:translateY(-3px);box-shadow:var(--sh-2);border-color:#D8D8D4;
}
.br-hcard__media{position:relative;overflow:hidden;background:#E9E9E5;min-height:132px}
.br-hcard__media img{width:100%;height:100%;object-fit:cover;transition:transform .35s var(--ease)}
.br-hcard__link:hover .br-hcard__media img{transform:scale(1.04)}
.br-hcard__body{padding:16px 18px 18px 0;display:flex;flex-direction:column;gap:8px}
.br-badge{
  align-self:flex-start;display:inline-block;
  padding:3px 9px;border-radius:var(--r-sm);font-size:12px;letter-spacing:.06em;
  background:rgba(255,75,35,.1);color:var(--brand);font-weight:700;
}
.br-hcard__title{
  position:relative;font-size:17px;font-weight:700;line-height:1.45;color:var(--text);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.br-hcard__title::after{
  content:"";position:absolute;left:0;bottom:-2px;width:0;height:2px;background:var(--brand);
  transition:width .3s var(--ease);
}
.br-hcard__link:hover .br-hcard__title::after{width:100%}
.br-hcard__desc{
  font-size:14px;line-height:1.8;color:var(--text-2);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.br-hcard__meta{margin-top:auto;font-size:12px;letter-spacing:.06em;color:var(--text-2)}
.br-hcard__meta time{font-weight:700;color:var(--ink)}

/* ---------- faq ---------- */
.br-faq{border-top:1px solid var(--line)}
.br-faq__item{border-bottom:1px solid var(--line)}
.br-faq__q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:24px 4px;background:none;border:0;text-align:left;
  font-size:17px;font-weight:700;line-height:1.6;color:var(--text);
  transition:color .25s var(--ease);
}
.br-faq__q:hover{color:var(--brand)}
.br-faq__icon{
  flex:0 0 auto;width:26px;height:26px;border-radius:50%;
  border:1px solid var(--line);display:flex;align-items:center;justify-content:center;
  font-size:15px;font-weight:700;color:var(--text-2);
  transition:transform .3s var(--ease),color .3s var(--ease),border-color .3s var(--ease);
}
.br-faq__item.is-open .br-faq__icon{color:var(--brand);border-color:var(--brand);transform:rotate(90deg)}
.br-faq__a{max-height:0;overflow:hidden;transition:max-height .3s var(--ease)}
.br-faq__a p{padding:0 60px 26px 4px;font-size:15.5px;line-height:1.9;color:var(--text-2)}

/* ---------- cta ---------- */
.br-cta{
  position:relative;background:var(--ink);color:var(--text-dark);
  padding:76px 0;margin-top:var(--sec);overflow:hidden;
}
.br-cta::before{
  content:"";position:absolute;inset:0;
  background-image:repeating-linear-gradient(135deg,rgba(255,255,255,.035) 0 1px,transparent 1px 12px);
}
.br-cta__inner{
  position:relative;z-index:2;display:flex;align-items:center;justify-content:space-between;gap:36px;flex-wrap:wrap;
}
.br-cta__actions{display:flex;align-items:center;gap:20px;flex-wrap:wrap}
.br-cta__text{max-width:520px;text-align:right}
.br-cta__text h2{font-size:clamp(22px,2.6vw,32px);font-weight:800;line-height:1.25;letter-spacing:-.01em;color:#fff}
.br-cta__text p{margin-top:10px;font-size:15px;color:var(--text-dark-2)}
.br-cta__link{font-size:14px;font-weight:700;color:var(--text-dark-2);transition:color .25s var(--ease)}
.br-cta__link:hover{color:var(--brand)}

/* ---------- footer ---------- */
.br-footer{background:var(--ink);color:var(--text-dark-2);padding:72px 0 30px}
.br-footer__grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.3fr;gap:40px}
.br-footer__col{min-width:0}
.br-footer .br-logo{margin-bottom:16px}
.br-footer__desc{font-size:14px;line-height:1.9;color:var(--text-dark-2);max-width:320px}
.br-footer__social{display:flex;flex-wrap:wrap;gap:14px;margin-top:18px}
.br-footer__social a{font-size:13px;color:var(--text-dark-2);border:1px solid var(--line-dark);border-radius:var(--r-pill);padding:6px 14px;transition:color .25s var(--ease),border-color .25s var(--ease),transform .25s var(--ease)}
.br-footer__social a:hover{color:var(--brand);border-color:var(--brand);transform:translateY(-1px)}
.br-footer__title{font-size:13px;letter-spacing:.08em;color:#fff;font-weight:700;margin-bottom:16px}
.br-footer__links li{margin-bottom:10px}
.br-footer__links a{font-size:14px;color:var(--text-dark-2);display:inline-block;transition:color .25s var(--ease),transform .25s var(--ease)}
.br-footer__links a:hover{color:var(--brand);transform:translateX(2px)}
.br-sub{display:flex;gap:10px}
.br-sub input{
  flex:1 1 auto;min-width:0;background:rgba(255,255,255,.06);
  border:1px solid var(--line-dark);border-radius:var(--r-field);
  padding:12px 14px;color:#fff;outline:none;font-size:14px;
  transition:border-color .25s var(--ease),box-shadow .25s var(--ease);
}
.br-sub input::placeholder{color:var(--text-dark-2)}
.br-sub input:focus{border-color:var(--brand);box-shadow:0 0 0 3px rgba(255,75,35,.15)}
.br-sub button{
  flex:0 0 auto;border:0;background:var(--brand);color:#fff;border-radius:var(--r-field);
  padding:12px 20px;font-size:14px;font-weight:700;
  transition:background .25s var(--ease),transform .25s var(--ease);
}
.br-sub button:hover{background:var(--brand-dark);transform:translateY(-1px)}
.br-sub__tip{margin-top:12px;font-size:13px;line-height:1.8;color:var(--text-dark-2)}
.br-footer__bottom{
  margin-top:52px;padding-top:22px;border-top:1px solid var(--line-dark);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:var(--text-dark-2);
}

/* ---------- back to top ---------- */
.br-top{
  position:fixed;right:24px;bottom:24px;z-index:90;
  width:46px;height:46px;border-radius:50%;border:1px solid var(--line);
  background:#fff;color:var(--ink);font-size:16px;
  display:flex;align-items:center;justify-content:center;
  box-shadow:var(--sh-2);opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .3s var(--ease),transform .3s var(--ease),visibility .3s var(--ease),background .25s var(--ease),color .25s var(--ease);
}
.br-top.is-visible{opacity:1;visibility:visible;transform:none}
.br-top:hover{background:var(--brand);color:#fff;border-color:var(--brand)}

/* ---------- motion ---------- */
.br-fade{opacity:0;transform:translateY(12px);transition:opacity .35s var(--ease),transform .35s var(--ease)}
.br-fade.is-in{opacity:1;transform:none}

@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  .br-fade{transform:none;transition:opacity .28s linear}
  .br-hcard__link,.br-hcard__media img,.br-rail,.br-btn,.br-chip{transition:none !important}
}

/* ---------- responsive ---------- */
@media (max-width:1024px){
  :root{--sec:72px;--sec-sm:52px}
  .br-search input{width:130px}
  .br-rail-layout{grid-template-columns:1fr;gap:16px}
  .br-rail-side{flex-direction:row;align-items:center;gap:10px;padding-top:0}
  .br-rail-side__name{writing-mode:horizontal-tb;letter-spacing:.2em}
  .br-rail-side__line{width:26px;height:3px}
  .br-hcard{flex:0 0 340px}
  .br-rail-arrow{display:none}
  .br-stats{grid-template-columns:repeat(2,1fr)}
  .br-stats__item:nth-child(2){border-right:0}
  .br-stats__item:nth-child(1),.br-stats__item:nth-child(2){border-bottom:1px solid var(--line)}
  .br-footer__grid{grid-template-columns:1fr 1fr;gap:32px}
  .br-cta__text{text-align:left;max-width:100%}
}
@media (max-width:768px){
  .br-search{display:none}
  .br-menu-btn{display:inline-flex}
  .br-channelbar{display:none}
  .br-channelbar.is-open{display:block;background:var(--ink);border-top:1px solid var(--line-dark)}
  .br-channelbar.is-open .br-channels{flex-direction:column;align-items:stretch;gap:0;padding:8px 0 18px}
  .br-channelbar.is-open .br-channels__item{
    padding:14px 14px 14px 12px;border-bottom:1px solid rgba(255,255,255,.06);border-left:3px solid transparent;
  }
  .br-channelbar.is-open .br-channels__item.is-active{border-left-color:var(--brand)}
  .br-channelbar.is-open .br-channels__item::after{display:none}
  .br-pagehero{min-height:220px}
  .br-hcard{flex:0 0 300px;max-width:86vw}
  .br-hcard__link{grid-template-columns:38% minmax(0,1fr);gap:12px}
  .br-hcard__body{padding:14px 14px 16px 0}
  .br-hcard__title{font-size:16px}
  .br-faq__a p{padding-right:8px}
  .br-cta{padding:60px 0}
  .br-cta__inner{flex-direction:column;align-items:flex-start}
  .br-sub{flex-direction:column}
  .br-sub button{width:100%}
}
@media (max-width:520px){
  :root{--sec:56px;--sec-sm:44px}
  .container{padding:0 20px}
  .br-logo{font-size:20px}
  .br-brandbar__inner{min-height:64px}
  .br-rail-head{flex-direction:column;align-items:flex-start;gap:10px}
  .br-hcard{flex:0 0 86%}
  .br-hcard__link{grid-template-columns:1fr;gap:0}
  .br-hcard__media{min-height:150px}
  .br-hcard__body{padding:14px 16px 18px}
  .br-stats{grid-template-columns:1fr}
  .br-stats__item{border-right:0;border-bottom:1px solid var(--line)}
  .br-footer__grid{grid-template-columns:1fr}
  .br-footer__bottom{flex-direction:column;gap:8px}
  .br-pagehero h1{font-size:26px}
  .br-top{right:16px;bottom:16px}
}

/* roulang page: category4 */
:root{
  --brand:#FF4B23;
  --brand-dark:#D93A16;
  --accent:#C8FF3D;
  --ink:#121316;
  --slate:#2A2D33;
  --bg:#F7F7F5;
  --card:#FFFFFF;
  --line:#E4E4E1;
  --line-dark:rgba(255,255,255,.12);
  --text:#17181B;
  --muted:#5C6068;
  --dark-text:#F2F2F0;
  --dark-muted:#A8ACB3;
  --r-lg:16px;
  --r-md:12px;
  --r-sm:6px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(18,19,22,.06);
  --sh-2:0 12px 32px rgba(18,19,22,.14);
  --ease:cubic-bezier(.2,.7,.2,1);
  --gap-section:96px;
  --gap-section-sm:60px;
}

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

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

body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"PingFang SC","Hiragino Sans GB","Source Han Sans SC","Noto Sans SC","Microsoft YaHei",sans-serif;
  font-size:16px;
  line-height:1.9;
  -webkit-font-smoothing:antialiased;
}

img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;transition:color .25s var(--ease),border-color .25s var(--ease),background-color .25s var(--ease);}
a:hover{color:var(--brand);}
button{font-family:inherit;cursor:pointer;}
input{font-family:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,p{margin:0;}
:focus-visible{outline:2px solid var(--brand);outline-offset:3px;}

.container{
  width:100%;
  max-width:1280px;
  margin:0 auto;
  padding:0 48px;
}

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

/* ============ 按钮 / 徽章 ============ */
.br-btn{
  display:inline-flex;align-items:center;justify-content:center;
  gap:8px;
  padding:13px 26px;
  border-radius:var(--r-pill);
  border:1px solid transparent;
  font-size:15px;font-weight:700;letter-spacing:.01em;
  transition:background-color .25s var(--ease),color .25s var(--ease),border-color .25s var(--ease),transform .25s var(--ease),box-shadow .25s var(--ease);
  white-space:nowrap;
}
.br-btn--primary{background:var(--brand);color:#fff;box-shadow:0 6px 18px rgba(255,75,35,.22);}
.br-btn--primary:hover{background:var(--brand-dark);color:#fff;transform:translateY(-1px);}
.br-btn--ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.55);}
.br-btn--ghost:hover{border-color:var(--brand);color:var(--brand);}
.br-btn--light{background:#fff;color:var(--ink);}
.br-btn--light:hover{background:#fff;color:var(--brand-dark);transform:translateY(-1px);}
.br-btn--outline{background:transparent;color:var(--text);border-color:var(--line);}
.br-btn--outline:hover{border-color:var(--brand);color:var(--brand);}
.br-btn--sm{padding:9px 18px;font-size:14px;}

.br-badge{
  display:inline-block;padding:3px 10px;border-radius:var(--r-sm);
  background:rgba(255,75,35,.1);color:var(--brand);
  font-size:12px;font-weight:700;letter-spacing:.06em;
}
.br-badge--solid{background:var(--brand);color:#fff;}
.br-badge--accent{background:var(--accent);color:#25310a;}

/* ============ 导航 ============ */
.br-header{
  position:fixed;top:0;left:0;right:0;z-index:60;
  background:linear-gradient(180deg,rgba(18,19,22,.92) 0%,rgba(18,19,22,.72) 62%,rgba(18,19,22,0) 100%);
  transition:background .28s var(--ease),box-shadow .28s var(--ease),border-color .28s var(--ease);
  border-bottom:1px solid transparent;
}
.br-header.is-stuck{
  background:rgba(18,19,22,.94);
  border-bottom:1px solid var(--line-dark);
  box-shadow:0 10px 30px rgba(18,19,22,.28);
}
.br-brandbar__inner{
  display:flex;align-items:center;justify-content:space-between;
  gap:24px;height:70px;
}
.br-logo{
  display:inline-flex;align-items:baseline;
  font-size:22px;font-weight:800;letter-spacing:-.01em;line-height:1;
}
.br-logo__main{color:#fff;}
.br-logo__sub{color:var(--brand);}
.br-footer .br-logo__main{color:#fff;}
.br-tools{display:flex;align-items:center;gap:14px;}
.br-search{
  display:flex;align-items:center;gap:0;
  background:rgba(255,255,255,.08);
  border:1px solid var(--line-dark);
  border-radius:var(--r-pill);
  padding:4px 4px 4px 16px;
  transition:border-color .25s var(--ease),box-shadow .25s var(--ease);
}
.br-search:focus-within{border-color:var(--brand);box-shadow:0 0 0 3px rgba(255,75,35,.15);}
.br-search input{
  width:180px;border:0;background:transparent;color:#fff;
  font-size:14px;padding:6px 0;
}
.br-search input::placeholder{color:rgba(255,255,255,.5);}
.br-search input:focus{outline:none;}
.br-search button{
  border:0;background:var(--brand);color:#fff;
  border-radius:var(--r-pill);padding:7px 16px;font-size:13px;font-weight:700;
  transition:background-color .25s var(--ease);
}
.br-search button:hover{background:var(--brand-dark);}
.br-menu-btn{
  display:none;
  background:rgba(255,255,255,.08);
  border:1px solid var(--line-dark);
  color:#fff;border-radius:var(--r-pill);
  padding:9px 16px;font-size:14px;font-weight:600;
}
.br-menu-btn:hover{border-color:var(--brand);color:var(--brand);}

.br-channelbar{border-top:1px solid rgba(255,255,255,.08);}
.br-channelbar__inner{
  display:flex;align-items:center;
  overflow-x:auto;scrollbar-width:none;
  -webkit-overflow-scrolling:touch;
}
.br-channelbar__inner::-webkit-scrollbar{display:none;}
.br-channels{display:flex;align-items:center;gap:34px;min-height:54px;}
.br-channels__item{
  position:relative;display:inline-block;
  color:rgba(255,255,255,.78);
  font-size:15px;padding:15px 0;white-space:nowrap;
}
.br-channels__item::after{
  content:"";position:absolute;left:0;right:0;bottom:8px;height:1px;
  background:rgba(255,255,255,.28);
  transform:scaleX(0);transform-origin:left;
  transition:transform .25s var(--ease),background-color .25s var(--ease);
}
.br-channels__item:hover{color:var(--brand);}
.br-channels__item:hover::after{transform:scaleX(1);}
.br-channels__item.is-active{
  color:#fff;font-weight:800;
}
.br-channels__item.is-active::after{
  transform:scaleX(1);height:2px;background:var(--brand);
}

/* ============ 面包屑 ============ */
.br-crumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;color:var(--dark-muted);
  padding-bottom:14px;margin-bottom:20px;
  border-bottom:1px solid rgba(255,255,255,.16);
  width:100%;
}
.br-crumb a{color:rgba(255,255,255,.82);}
.br-crumb a:hover{color:var(--brand);}
.br-crumb span[aria-current]{color:#fff;font-weight:700;}

/* ============ 分类页矮版 Hero ============ */
.pg-hero{
  position:relative;
  min-height:300px;
  display:flex;align-items:flex-end;
  overflow:hidden;
  background:var(--ink);
  padding:150px 0 46px;
}
.pg-hero__bg{position:absolute;inset:0;}
.pg-hero__bg img{
  width:100%;height:100%;object-fit:cover;
  opacity:.5;
  transform:scale(1.04);
  animation:heroZoom 12s var(--ease) forwards;
}
@keyframes heroZoom{from{transform:scale(1.1);}to{transform:scale(1);}}
.pg-hero__veil{
  position:absolute;inset:0;
  background:linear-gradient(90deg,rgba(18,19,22,.94) 0%,rgba(18,19,22,.72) 48%,rgba(18,19,22,.42) 100%),
             linear-gradient(180deg,rgba(18,19,22,.5) 0%,rgba(18,19,22,0) 40%,rgba(18,19,22,.9) 100%);
}
.pg-hero__inner{position:relative;z-index:2;width:100%;}
.pg-hero .br-tagline{
  display:inline-flex;align-items:center;gap:10px;
  font-size:12px;letter-spacing:.08em;
  color:var(--accent);font-weight:700;margin-bottom:14px;
}
.pg-hero .br-tagline::before{
  content:"";width:22px;height:2px;background:var(--accent);display:inline-block;
}
.pg-hero h1{
  color:#fff;
  font-size:clamp(28px,4.4vw,48px);
  font-weight:900;line-height:1.14;letter-spacing:-.02em;
  max-width:820px;
}
.pg-hero h1 em{font-style:normal;color:var(--brand);}
.pg-hero__sub{
  margin-top:16px;max-width:660px;
  color:var(--dark-muted);font-size:17px;line-height:1.85;
}
.pg-hero__actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px;}

/* ============ 标签筛选行 ============ */
.filter-bar{
  background:var(--card);
  border-bottom:1px solid var(--line);
  position:sticky;top:124px;z-index:30;
}
.filter-bar__inner{
  display:flex;align-items:center;gap:12px;
  padding:14px 0;overflow-x:auto;scrollbar-width:none;
}
.filter-bar__inner::-webkit-scrollbar{display:none;}
.filter-bar__label{
  font-size:12px;letter-spacing:.08em;color:var(--muted);
  white-space:nowrap;font-weight:700;
}
.chip{
  display:inline-block;white-space:nowrap;
  padding:8px 18px;border-radius:var(--r-pill);
  border:1px solid var(--line);
  font-size:14px;color:var(--muted);
  transition:all .25s var(--ease);
}
.chip:hover{border-color:var(--brand);color:var(--brand);}
.chip.is-active{
  background:var(--brand);border-color:var(--brand);color:#fff;font-weight:700;
  box-shadow:0 6px 16px rgba(255,75,35,.2);
}

/* ============ 通用板块 ============ */
.section{padding:var(--gap-section) 0;}
.section--tight{padding:64px 0;}
.section__head{
  display:flex;align-items:flex-end;justify-content:space-between;
  gap:24px;margin-bottom:36px;flex-wrap:wrap;
}
.section__title{
  display:flex;align-items:center;gap:14px;
  font-size:clamp(22px,2.6vw,32px);
  font-weight:800;line-height:1.2;letter-spacing:-.01em;
}
.section__title::before{
  content:"";width:4px;height:24px;background:var(--brand);border-radius:2px;flex:none;
}
.section__desc{color:var(--muted);font-size:15px;margin-top:10px;max-width:760px;}
.section__more{
  font-size:14px;font-weight:700;color:var(--brand);
  display:inline-flex;align-items:center;gap:6px;
}
.section__more:hover{color:var(--brand-dark);}
.section__more::after{content:"→";transition:transform .25s var(--ease);}
.section__more:hover::after{transform:translateX(3px);}

/* ============ 马赛克网格 ============ */
.mosaic{display:grid;grid-template-columns:repeat(6,1fr);gap:24px;}
.ms-card{
  position:relative;display:block;overflow:hidden;
  border-radius:var(--r-md);
  background:var(--slate);
  box-shadow:var(--sh-1);
  transition:transform .3s var(--ease),box-shadow .3s var(--ease);
}
.ms-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);}
.ms-card img{
  width:100%;height:100%;object-fit:cover;
  transition:transform .45s var(--ease),opacity .3s var(--ease);
  opacity:.92;
}
.ms-card:hover img{transform:scale(1.05);opacity:1;}
.ms-card__veil{
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(18,19,22,.28) 0%,rgba(18,19,22,.06) 34%,rgba(18,19,22,.86) 78%,rgba(18,19,22,.96) 100%);
}
.ms-card__body{
  position:absolute;left:0;right:0;bottom:0;
  padding:22px 24px;color:#fff;
}
.ms-card__kicker{
  display:inline-block;font-size:12px;letter-spacing:.08em;
  color:var(--accent);font-weight:700;margin-bottom:8px;
}
.ms-card h3{
  font-size:17px;font-weight:700;line-height:1.45;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.ms-card__meta{
  display:flex;flex-wrap:wrap;gap:12px;margin-top:10px;
  font-size:12px;letter-spacing:.05em;color:rgba(255,255,255,.72);
}
.ms-card__meta .dot{width:3px;height:3px;border-radius:50%;background:var(--brand);align-self:center;}
.ms-card--wide{grid-column:span 3;aspect-ratio:16/9;}
.ms-card--small{grid-column:span 2;aspect-ratio:1/1;}
.ms-card--full{grid-column:span 6;aspect-ratio:21/9;}

.ms-divider{
  grid-column:span 6;
  display:flex;align-items:center;gap:14px;
  margin:12px 0 4px;
}
.ms-divider__line{flex:1;height:1px;background:var(--line);}
.ms-divider__text{
  font-size:12px;letter-spacing:.14em;color:var(--muted);
  font-weight:700;white-space:nowrap;
}
.ms-divider__num{
  font-size:12px;font-weight:700;color:var(--brand);letter-spacing:.1em;
}

/* ============ 排查速览 ============ */
.steps{
  display:grid;grid-template-columns:repeat(4,1fr);
  gap:0;border-top:1px solid var(--line);border-left:1px solid var(--line);
}
.step{
  padding:30px 26px 34px;
  border-right:1px solid var(--line);border-bottom:1px solid var(--line);
  background:var(--card);
  transition:transform .3s var(--ease),box-shadow .3s var(--ease);
}
.step:hover{transform:translateY(-3px);box-shadow:var(--sh-2);position:relative;z-index:2;}
.step__num{
  font-size:13px;font-weight:800;letter-spacing:.12em;color:var(--brand);
}
.step h3{font-size:17px;font-weight:700;margin:14px 0 10px;line-height:1.45;}
.step p{font-size:14px;color:var(--muted);line-height:1.85;}

/* ============ FAQ ============ */
.faq{border-top:1px solid var(--line);max-width:920px;}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  background:transparent;border:0;text-align:left;
  padding:22px 2px;font-size:17px;font-weight:700;color:var(--text);
  transition:color .25s var(--ease);
}
.faq-q:hover{color:var(--brand);}
.faq-icon{
  flex:none;width:26px;height:26px;border-radius:50%;
  border:1px solid var(--line);
  display:flex;align-items:center;justify-content:center;
  font-size:15px;line-height:1;color:var(--muted);
  transition:transform .3s var(--ease),color .3s var(--ease),border-color .3s var(--ease),background-color .3s var(--ease);
}
.faq-item.is-open .faq-icon{
  transform:rotate(90deg);
  color:#fff;border-color:var(--brand);background:var(--brand);
}
.faq-item.is-open .faq-q{color:var(--brand);}
.faq-a{
  max-height:0;overflow:hidden;
  transition:max-height .3s var(--ease);
}
.faq-a__inner{
  padding:0 2px 26px;font-size:15.5px;line-height:1.95;color:var(--muted);max-width:800px;
}
.faq-a__inner p + p{margin-top:12px;}

/* ============ 分页圆点 ============ */
.pager{
  display:flex;align-items:center;justify-content:center;gap:14px;
  margin-top:52px;
}
.pager__dot{
  width:38px;height:38px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  border:1px solid var(--line);background:var(--card);
  font-size:14px;font-weight:700;color:var(--muted);
  transition:all .25s var(--ease);
}
.pager__dot:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-2px);}
.pager__dot.is-current{
  background:var(--brand);border-color:var(--brand);color:#fff;
  box-shadow:0 8px 20px rgba(255,75,35,.26);
}
.pager__arrow{
  font-size:14px;font-weight:700;color:var(--muted);padding:0 6px;
}
.pager__arrow:hover{color:var(--brand);}

/* ============ CTA 带 ============ */
.cta-band{
  background:var(--ink);
  color:var(--dark-text);
  padding:76px 0;
  position:relative;
  overflow:hidden;
}
.cta-band::after{
  content:"";position:absolute;inset:0;
  background:repeating-linear-gradient(135deg,rgba(255,255,255,.04) 0 2px,transparent 2px 12px);
  pointer-events:none;
}
.cta-band__inner{
  position:relative;z-index:2;
  display:flex;align-items:center;justify-content:space-between;
  gap:32px;flex-wrap:wrap;
}
.cta-band h2{
  font-size:clamp(22px,2.6vw,32px);font-weight:800;line-height:1.25;color:#fff;
  max-width:620px;
}
.cta-band p{color:var(--dark-muted);font-size:15px;margin-top:12px;max-width:560px;}
.cta-band__actions{display:flex;align-items:center;gap:20px;flex-wrap:wrap;}
.cta-band__link{font-size:14px;font-weight:700;color:var(--accent);}
.cta-band__link:hover{color:#fff;}

/* ============ 页脚 ============ */
.br-footer{
  background:var(--ink);color:var(--dark-text);
  padding:72px 0 0;
  border-top:1px solid var(--line-dark);
}
.br-footer__grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1.3fr;gap:48px;
  padding-bottom:56px;
}
.br-footer__desc{
  color:var(--dark-muted);font-size:14px;line-height:1.9;margin-top:16px;max-width:320px;
}
.br-footer__social{display:flex;flex-wrap:wrap;gap:16px;margin-top:20px;}
.br-footer__social a{font-size:14px;color:var(--dark-muted);}
.br-footer__social a:hover{color:var(--brand);}
.br-footer__title{
  font-size:13px;letter-spacing:.08em;color:var(--dark-muted);
  font-weight:700;margin-bottom:18px;
}
.br-footer__links li + li{margin-top:11px;}
.br-footer__links a{
  font-size:14px;color:rgba(255,255,255,.86);
  display:inline-block;
}
.br-footer__links a:hover{color:var(--brand);transform:translateX(2px);}
.br-sub{display:flex;gap:10px;}
.br-sub input{
  flex:1;min-width:0;
  background:rgba(255,255,255,.06);
  border:1px solid var(--line-dark);
  border-radius:10px;
  padding:12px 14px;color:#fff;font-size:14px;
  transition:border-color .25s var(--ease),box-shadow .25s var(--ease);
}
.br-sub input::placeholder{color:rgba(255,255,255,.42);}
.br-sub input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(255,75,35,.15);}
.br-sub button{
  border:0;background:var(--brand);color:#fff;border-radius:10px;
  padding:12px 20px;font-size:14px;font-weight:700;white-space:nowrap;
  transition:background-color .25s var(--ease),transform .25s var(--ease);
}
.br-sub button:hover{background:var(--brand-dark);transform:translateY(-1px);}
.br-sub__tip{font-size:12.5px;color:var(--dark-muted);margin-top:12px;line-height:1.8;}
.br-footer__bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  border-top:1px solid var(--line-dark);
  padding:24px 0 28px;
  font-size:13px;color:var(--dark-muted);
}

/* ============ 返回顶部 ============ */
.to-top{
  position:fixed;right:26px;bottom:26px;z-index:70;
  width:46px;height:46px;border-radius:50%;
  border:1px solid var(--line);
  background:#fff;color:var(--text);
  display:flex;align-items:center;justify-content:center;
  font-size:16px;font-weight:700;
  box-shadow:var(--sh-2);
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .3s var(--ease),transform .3s var(--ease),visibility .3s var(--ease),background-color .25s var(--ease),color .25s var(--ease);
}
.to-top.is-visible{opacity:1;visibility:visible;transform:translateY(0);}
.to-top:hover{background:var(--brand);border-color:var(--brand);color:#fff;}

/* ============ 进场动效 ============ */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .5s var(--ease),transform .5s var(--ease);}
.reveal.is-in{opacity:1;transform:none;}

/* ============ 响应式 ============ */
@media (max-width:1100px){
  .container{padding:0 32px;}
  .br-footer__grid{grid-template-columns:1fr 1fr;gap:40px;}
  .steps{grid-template-columns:repeat(2,1fr);}
  .filter-bar{top:0;position:static;}
}

@media (max-width:900px){
  .br-search{display:none;}
  .br-menu-btn{display:inline-flex;}
  .br-channelbar{
    position:fixed;top:70px;left:0;right:0;
    background:rgba(18,19,22,.98);
    border-top:1px solid var(--line-dark);
    max-height:0;overflow:hidden;
    transition:max-height .3s var(--ease);
  }
  .br-channelbar.is-open{max-height:70vh;overflow-y:auto;}
  .br-channelbar__inner{display:block;padding:10px 32px 22px;}
  .br-channels{display:block;min-height:0;}
  .br-channels li{border-bottom:1px solid rgba(255,255,255,.08);}
  .br-channels__item{display:block;padding:16px 0 16px 14px;font-size:16px;}
  .br-channels__item::after{display:none;}
  .br-channels__item.is-active{
    border-left:3px solid var(--brand);
    background:rgba(255,75,35,.08);
  }
  .section{padding:var(--gap-section-sm) 0;}
  .ms-card--wide{grid-column:span 6;aspect-ratio:16/9;}
  .ms-card--small{grid-column:span 3;aspect-ratio:1/1;}
  .ms-card--full{grid-column:span 6;aspect-ratio:16/9;}
  .ms-divider{grid-column:span 6;}
}

@media (max-width:640px){
  .container{padding:0 20px;}
  body{font-size:15.5px;line-height:1.85;}
  .br-brandbar__inner{height:62px;}
  .br-logo{font-size:20px;}
  .br-channelbar{top:62px;}
  .pg-hero{padding:120px 0 38px;min-height:260px;}
  .pg-hero__sub{font-size:15.5px;}
  .pg-hero__actions .br-btn{width:100%;}
  .mosaic{gap:16px;}
  .ms-card--wide,.ms-card--full{grid-column:span 6;}
  .ms-card--small{grid-column:span 6;aspect-ratio:16/9;}
  .ms-card__body{padding:18px;}
  .steps{grid-template-columns:1fr;}
  .cta-band{padding:56px 0;}
  .cta-band__inner{flex-direction:column;align-items:flex-start;}
  .cta-band__actions{width:100%;}
  .cta-band__actions .br-btn{width:100%;}
  .br-footer__grid{grid-template-columns:1fr;gap:34px;padding-bottom:40px;}
  .br-sub{flex-direction:column;}
  .br-sub button{width:100%;}
  .br-footer__bottom{flex-direction:column;align-items:flex-start;gap:8px;}
  .to-top{right:16px;bottom:16px;}
  .section__head{margin-bottom:26px;}
}

@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important;}
  .reveal{transform:none;}
  .pg-hero__bg img{animation:none;transform:none;}
}