/* roulang page: index */
/* ============ 设计变量 ============ */
:root{
  --c-orange:#FF5A1F;
  --c-orange-d:#D9470F;
  --c-teal:#0FA3A3;
  --c-teal-d:#0A8282;
  --c-lime:#D7FF3F;
  --c-ink:#0E1112;
  --c-paper:#F6F4EF;
  --c-surface:#FFFFFF;
  --c-line:#E4E0D8;
  --c-line-2:#CFC9BE;
  --c-text:#121514;
  --c-muted:#6A716E;
  --r-xs:8px;
  --r-sm:10px;
  --r-md:14px;
  --r-lg:22px;
  --sh-1:0 1px 2px rgba(16,17,18,.06),0 12px 30px rgba(16,17,18,.08);
  --sh-2:0 2px 6px rgba(16,17,18,.08),0 20px 44px rgba(16,17,18,.14);
  --ease:cubic-bezier(.2,.7,.3,1);
  --maxw:1304px;
}

/* ============ 基础重置 ============ */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--c-paper);
  color:var(--c-text);
  font-family:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{display:block;max-width:100%;height:auto;}
a{color:inherit;text-decoration:none;}
h1,h2,h3,h4,p,ul,li,figure{margin:0;}
ul{list-style:none;padding:0;}
button,input{font:inherit;color:inherit;}
:focus-visible{outline:2px solid var(--c-teal);outline-offset:2px;border-radius:6px;}
.mono{font-family:ui-monospace,"SFMono-Regular",Menlo,Consolas,monospace;letter-spacing:.02em;}

/* ============ 容器 ============ */
.container{
  width:100%;
  max-width:var(--maxw);
  margin:0 auto;
  padding:0 32px;
}
@media (max-width:1024px){ .container{padding:0 24px;} }
@media (max-width:640px){ .container{padding:0 20px;} }

/* ============ 通用板块 ============ */
.section{padding:104px 0;}
.section--white{background:var(--c-surface);}
.section--paper{background:var(--c-paper);}
.section--ink{background:var(--c-ink);color:#fff;}
.section-head{max-width:720px;margin-bottom:52px;}
.section-head--wide{max-width:900px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:9px;
  font-size:12.5px;font-weight:700;letter-spacing:.1em;
  color:var(--c-orange);margin-bottom:16px;
}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--c-orange);display:inline-block;}
.section-title{
  font-size:clamp(26px,3.3vw,40px);
  line-height:1.22;
  font-weight:800;
  letter-spacing:-.02em;
}
.section-desc{margin-top:14px;color:var(--c-muted);font-size:16.5px;line-height:1.85;}
.section--ink .section-desc{color:rgba(255,255,255,.72);}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--r-sm);
  font-size:15px;font-weight:700;border:1px solid transparent;
  cursor:pointer;white-space:nowrap;
  transition:background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease),box-shadow .18s var(--ease);
}
.btn-sm{height:40px;padding:0 16px;font-size:14px;border-radius:var(--r-xs);}
.btn-primary{background:var(--c-orange);color:#fff;}
.btn-primary:hover{background:var(--c-orange-d);transform:translateY(-1px);box-shadow:0 12px 24px rgba(255,90,31,.28);}
.btn-primary:active{transform:translateY(0);box-shadow:none;}
.btn-outline{background:transparent;border-color:var(--c-line-2);color:var(--c-text);}
.btn-outline:hover{background:var(--c-ink);border-color:var(--c-ink);color:#fff;transform:translateY(-1px);}
.btn-light{background:#fff;color:var(--c-ink);}
.btn-light:hover{background:var(--c-lime);transform:translateY(-1px);}
.btn-dark-outline{background:transparent;border-color:rgba(255,255,255,.38);color:#fff;}
.btn-dark-outline:hover{background:#fff;border-color:#fff;color:var(--c-ink);transform:translateY(-1px);}
.btn[disabled],.btn.is-disabled{opacity:.4;pointer-events:none;}

/* ============ 徽章 / 标签 ============ */
.badge{
  display:inline-flex;align-items:center;
  padding:3px 10px;border-radius:999px;
  font-size:12px;font-weight:700;letter-spacing:.03em;
  background:rgba(255,90,31,.1);color:var(--c-orange-d);
  border:1px solid rgba(255,90,31,.18);
}
.badge-teal{background:rgba(15,163,163,.1);color:var(--c-teal-d);border-color:rgba(15,163,163,.2);}
.badge-lime{background:rgba(215,255,63,.32);color:#4C5B00;border-color:rgba(160,190,20,.35);}
.badge-ink{background:rgba(14,17,18,.06);color:#3A403E;border-color:rgba(14,17,18,.12);}

/* ============ 导航 ============ */
.off-canvas-wrapper{background:var(--c-paper);}
.site-header{
  position:sticky;top:0;z-index:60;
  background:var(--c-paper);
  border-bottom:1px solid var(--c-line);
  transition:box-shadow .22s var(--ease),background .22s var(--ease);
}
.site-header.is-stuck{background:#fff;box-shadow:0 6px 26px rgba(16,17,18,.08);}
.nav-inner{display:flex;align-items:center;gap:24px;height:72px;}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand-mark{
  width:30px;height:30px;border-radius:9px;position:relative;overflow:hidden;
  background:var(--c-ink);flex:0 0 auto;
}
.brand-mark::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(122deg,var(--c-orange) 0%,var(--c-orange) 52%,var(--c-teal) 52%,var(--c-teal) 100%);
}
.brand-mark::after{
  content:"";position:absolute;left:8px;top:8px;width:14px;height:13px;
  border:2.5px solid #fff;border-radius:3px 10px 3px 10px;
  transform:rotate(-12deg);
}
.brand-text{font-size:19px;font-weight:900;letter-spacing:-.02em;color:var(--c-ink);}
.nav-links{display:flex;align-items:center;gap:2px;margin-left:6px;}
.nav-link{
  position:relative;padding:9px 13px;border-radius:var(--r-xs);
  font-size:15px;font-weight:600;color:#3A403E;
  transition:color .18s var(--ease),background .18s var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:13px;right:13px;bottom:3px;height:2px;
  background:var(--c-orange);transform:scaleX(0);transform-origin:left;
  transition:transform .22s var(--ease);
}
.nav-link:hover{color:var(--c-ink);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.active{color:var(--c-orange);}
.nav-link.active::after{transform:scaleX(1);}
.nav-actions{display:flex;align-items:center;gap:10px;margin-left:auto;}
.command-search{
  display:flex;align-items:center;gap:9px;
  height:42px;padding:0 12px;min-width:250px;
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-sm);
  transition:border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.command-search:focus-within{border-color:var(--c-orange);box-shadow:0 0 0 3px rgba(255,90,31,.14);}
.command-search svg{flex:0 0 auto;color:var(--c-muted);}
.command-search input{
  border:0;outline:0;background:transparent;width:100%;
  font-size:14px;color:var(--c-text);
}
.command-search input::placeholder{color:#9AA09C;}
.command-search .kbd{
  flex:0 0 auto;font-size:11px;line-height:1.4;color:var(--c-muted);
  border:1px solid var(--c-line);border-radius:5px;padding:1px 5px;
  font-family:ui-monospace,Menlo,Consolas,monospace;
}
.icon-btn{
  width:42px;height:42px;flex:0 0 auto;
  display:inline-flex;align-items:center;justify-content:center;
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-sm);
  color:#3A403E;cursor:pointer;
  transition:border-color .18s var(--ease),color .18s var(--ease),transform .18s var(--ease),background .18s var(--ease);
}
.icon-btn:hover{border-color:var(--c-ink);color:var(--c-ink);transform:translateY(-1px);}
.icon-btn:active{transform:scale(.94);}
.menu-btn{
  display:none;width:42px;height:42px;align-items:center;justify-content:center;
  background:var(--c-ink);color:#fff;border:0;border-radius:var(--r-sm);cursor:pointer;
}
.menu-btn:hover{background:#232829;}

/* 移动端抽屉 */
.drawer{background:#fff;padding:26px 22px 30px;}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:24px;}
.drawer-close{width:38px;height:38px;display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--c-line);border-radius:var(--r-xs);background:#fff;cursor:pointer;}
.drawer-search{display:flex;align-items:center;gap:9px;height:46px;padding:0 14px;border:1px solid var(--c-line);border-radius:var(--r-sm);background:var(--c-paper);margin-bottom:22px;}
.drawer-search input{border:0;background:transparent;outline:0;width:100%;font-size:15px;}
.drawer-nav{display:flex;flex-direction:column;gap:2px;margin-bottom:22px;}
.drawer-nav a{
  padding:14px 12px;border-radius:var(--r-xs);
  font-size:18px;font-weight:700;color:var(--c-text);
  transition:background .18s var(--ease),color .18s var(--ease);
}
.drawer-nav a:hover,.drawer-nav a.active{background:var(--c-paper);color:var(--c-orange);}
.drawer-quick{display:flex;gap:10px;margin-bottom:22px;}
.drawer-quick .icon-btn{flex:1;}
.drawer-cta{display:block;text-align:center;}

/* ============ Hero ============ */
.hero{position:relative;background:var(--c-ink);color:#fff;overflow:hidden;isolation:isolate;}
.hero-bg{
  position:absolute;inset:0;background-size:cover;background-position:center;
  opacity:.58;transform:scale(1.04);
  animation:heroDrift 22s ease-in-out infinite alternate;
}
@keyframes heroDrift{
  from{transform:scale(1.04) translateX(0);}
  to{transform:scale(1.1) translateX(-1.4%);}
}
.hero-veil{
  position:absolute;inset:0;
  background:linear-gradient(102deg,rgba(14,17,18,.94) 0%,rgba(14,17,18,.82) 44%,rgba(14,17,18,.46) 100%);
}
.hero-inner{position:relative;z-index:2;padding:104px 32px 92px;}
.hero-content{max-width:800px;}
.hero-tag{
  display:inline-flex;align-items:center;gap:10px;
  padding:7px 14px;border-radius:999px;
  background:rgba(255,255,255,.09);
  border:1px solid rgba(255,255,255,.18);
  font-size:12.5px;font-weight:700;letter-spacing:.09em;color:#fff;
}
.hero-tag i{width:7px;height:7px;border-radius:50%;background:var(--c-lime);display:inline-block;font-style:normal;}
.hero-title{
  margin-top:26px;
  font-size:clamp(34px,5.4vw,68px);
  line-height:1.06;
  font-weight:900;
  letter-spacing:-.03em;
}
.hero-title em{font-style:normal;color:var(--c-lime);}
.hero-sub{
  margin-top:22px;max-width:620px;
  font-size:clamp(16px,1.5vw,19px);
  line-height:1.8;
  color:rgba(255,255,255,.82);
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:36px;}
.hero-stats{
  display:flex;flex-wrap:wrap;gap:0;
  margin-top:52px;padding-top:26px;
  border-top:1px solid rgba(255,255,255,.18);
}
.stat{padding-right:40px;margin-right:40px;border-right:1px solid rgba(255,255,255,.16);}
.stat:last-child{border-right:0;margin-right:0;padding-right:0;}
.stat-k{display:block;font-size:12.5px;letter-spacing:.08em;color:rgba(255,255,255,.58);}
.stat-v{display:block;margin-top:6px;font-size:17px;font-weight:700;color:#fff;}

/* ============ 合集目录 ============ */
.coll-grid{display:grid;grid-template-columns:1.65fr 1fr 1fr;gap:26px;align-items:stretch;}
.coll-card{
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-md);
  overflow:hidden;display:flex;flex-direction:column;
  transition:transform .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.coll-card:hover{transform:translateY(-2px);border-color:var(--c-orange);box-shadow:var(--sh-2);}
.coll-link{display:flex;flex-direction:column;height:100%;}
.coll-media{position:relative;overflow:hidden;background:#E9E5DD;}
.coll-card--lg .coll-media{aspect-ratio:16/9;}
.coll-card--sm .coll-media{aspect-ratio:4/3;}
.coll-media img{width:100%;height:100%;object-fit:cover;transition:transform .3s var(--ease);}
.coll-card:hover .coll-media img{transform:scale(1.04);}
.coll-body{padding:24px 24px 22px;display:flex;flex-direction:column;flex:1;}
.coll-top{display:flex;align-items:center;gap:12px;margin-bottom:14px;}
.coll-num{font-size:26px;font-weight:900;letter-spacing:-.03em;color:var(--c-line-2);line-height:1;}
.coll-card--lg .coll-num{font-size:34px;}
.coll-title{font-size:21px;font-weight:800;line-height:1.4;letter-spacing:-.01em;transition:color .18s var(--ease);}
.coll-card--lg .coll-title{font-size:26px;}
.coll-card:hover .coll-title{color:var(--c-orange);}
.coll-text{margin-top:12px;color:var(--c-muted);font-size:15px;line-height:1.8;}
.coll-foot{
  margin-top:auto;padding-top:18px;
  display:flex;align-items:center;justify-content:space-between;
  font-size:13px;color:var(--c-muted);
}
.arrow{display:inline-block;transition:transform .2s var(--ease);color:var(--c-orange);font-weight:700;}
.coll-card:hover .arrow,.entry:hover .arrow,.post-card:hover .arrow,.rec-card:hover .arrow{transform:translateX(4px);}

/* ============ 精选条目（横向滚动） ============ */
.rail-wrap{position:relative;}
.rail{
  display:flex;gap:24px;overflow-x:auto;
  padding:6px 4px 22px;scroll-snap-type:x mandatory;
  -webkit-overflow-scrolling:touch;
}
.rail::-webkit-scrollbar{height:7px;}
.rail::-webkit-scrollbar-track{background:#EDE9E1;border-radius:99px;}
.rail::-webkit-scrollbar-thumb{background:#C6C0B5;border-radius:99px;}
.rail::-webkit-scrollbar-thumb:hover{background:var(--c-orange);}
.rail-item{flex:0 0 calc((100% - 48px) / 3);scroll-snap-align:start;}
.entry{
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-md);
  overflow:hidden;height:100%;display:flex;flex-direction:column;
  transition:transform .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.entry:hover{transform:translateY(-2px);border-color:var(--c-orange);box-shadow:var(--sh-2);}
.entry-media{aspect-ratio:16/9;overflow:hidden;background:#E9E5DD;}
.entry-media img{width:100%;height:100%;object-fit:cover;transition:transform .3s var(--ease);}
.entry:hover .entry-media img{transform:scale(1.04);}
.entry-body{padding:22px;display:flex;flex-direction:column;flex:1;}
.entry-title{margin-top:12px;font-size:18px;font-weight:800;line-height:1.45;transition:color .18s var(--ease);}
.entry:hover .entry-title{color:var(--c-orange);}
.entry-text{margin-top:10px;font-size:14.5px;color:var(--c-muted);line-height:1.8;}
.entry-foot{
  margin-top:auto;padding-top:16px;display:flex;align-items:center;justify-content:space-between;
  font-size:13px;color:var(--c-muted);
}

/* ============ 最新信息 CMS ============ */
.latest-layout{align-items:flex-start;}
.filter-panel{
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-md);
  padding:22px;position:sticky;top:100px;
}
.filter-title{font-size:13px;font-weight:700;letter-spacing:.08em;color:var(--c-muted);margin-bottom:14px;}
.filter-list{display:flex;flex-direction:column;gap:6px;}
.filter-list a{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:10px 12px;border-radius:var(--r-xs);
  font-size:14.5px;font-weight:600;color:#3A403E;
  transition:background .18s var(--ease),color .18s var(--ease);
}
.filter-list a:hover{background:var(--c-paper);color:var(--c-orange);}
.filter-list a.is-current{background:rgba(255,90,31,.09);color:var(--c-orange);}
.filter-list a span{font-size:12px;color:var(--c-muted);}
.filter-note{margin-top:18px;padding-top:16px;border-top:1px solid var(--c-line);font-size:13px;color:var(--c-muted);line-height:1.75;}
.post-card{
  display:flex;flex-direction:column;height:100%;
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-md);
  padding:22px 24px;
  transition:transform .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.post-card:hover{transform:translateY(-2px);border-color:var(--c-orange);box-shadow:var(--sh-1);}
.post-card-top{display:flex;align-items:center;gap:10px;margin-bottom:12px;}
.post-title{font-size:18px;font-weight:800;line-height:1.5;transition:color .18s var(--ease);}
.post-card:hover .post-title{color:var(--c-orange);}
.post-text{margin-top:10px;font-size:14.5px;color:var(--c-muted);line-height:1.8;}
.post-meta{
  margin-top:auto;padding-top:16px;
  display:flex;align-items:center;justify-content:space-between;
  font-size:13px;color:var(--c-muted);
}
.empty-state{
  background:#fff;border:1px dashed var(--c-line-2);border-radius:var(--r-md);
  padding:52px 24px;text-align:center;
}
.empty-state .empty-icon{
  width:46px;height:46px;margin:0 auto 16px;border-radius:50%;
  background:var(--c-paper);display:flex;align-items:center;justify-content:center;
  color:var(--c-muted);font-size:20px;
}
.empty-state p{font-size:16px;font-weight:700;color:var(--c-text);}
.empty-state .empty-sub{margin-top:8px;font-size:14px;font-weight:400;color:var(--c-muted);}
.empty-state .btn{margin-top:20px;}

/* ============ 相关推荐 ============ */
.rec-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;}
.rec-card{
  display:flex;flex-direction:column;height:100%;
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-md);
  overflow:hidden;
  transition:transform .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.rec-card:hover{transform:translateY(-2px);border-color:var(--c-orange);box-shadow:var(--sh-2);}
.rec-media{aspect-ratio:3/2;overflow:hidden;background:#E9E5DD;}
.rec-media img{width:100%;height:100%;object-fit:cover;transition:transform .3s var(--ease);}
.rec-card:hover .rec-media img{transform:scale(1.04);}
.rec-body{padding:20px;display:flex;flex-direction:column;flex:1;}
.rec-title{margin-top:10px;font-size:16.5px;font-weight:800;line-height:1.45;transition:color .18s var(--ease);}
.rec-card:hover .rec-title{color:var(--c-orange);}
.rec-text{margin-top:9px;font-size:14px;color:var(--c-muted);line-height:1.75;}
.rec-foot{margin-top:auto;padding-top:14px;display:flex;align-items:center;justify-content:space-between;font-size:12.5px;color:var(--c-muted);}

/* ============ 深色 CTA ============ */
.cta-band{
  position:relative;background:var(--c-ink);color:#fff;overflow:hidden;
  border-radius:var(--r-lg);
  padding:56px 52px;
  display:flex;align-items:center;justify-content:space-between;gap:36px;
}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-3.webp');
  background-size:cover;background-position:center;
  opacity:.16;
}
.cta-band::after{
  content:"";position:absolute;right:-70px;top:-60px;width:300px;height:300px;
  border-radius:50%;background:radial-gradient(circle,rgba(255,90,31,.42),transparent 68%);
}
.cta-content{position:relative;z-index:2;max-width:560px;}
.cta-title{font-size:clamp(23px,2.6vw,32px);font-weight:800;line-height:1.3;letter-spacing:-.02em;}
.cta-text{margin-top:12px;font-size:15.5px;color:rgba(255,255,255,.74);line-height:1.8;}
.cta-actions{position:relative;z-index:2;display:flex;flex-wrap:wrap;gap:12px;flex:0 0 auto;}

/* ============ FAQ ============ */
.faq .accordion{background:transparent;margin:0;}
.faq .accordion-item{
  border:1px solid var(--c-line);border-radius:var(--r-md);
  background:#fff;margin-bottom:12px;overflow:hidden;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.faq .accordion-item.is-active{border-color:var(--c-orange);box-shadow:var(--sh-1);}
.faq .accordion-title{
  border:0;background:transparent;color:var(--c-text);
  font-size:17px;font-weight:700;line-height:1.5;
  padding:20px 62px 20px 24px;
  transition:color .18s var(--ease);
}
.faq .accordion-title:hover{background:transparent;color:var(--c-orange);}
.faq .accordion-title::before{
  content:"+";position:absolute;right:24px;top:50%;
  margin-top:-15px;font-size:24px;font-weight:400;line-height:1;
  color:var(--c-orange);transition:transform .25s var(--ease);
}
.faq .accordion-item.is-active .accordion-title::before{content:"−";transform:rotate(180deg);}
.faq .accordion-content{
  border:0;background:transparent;
  padding:0 24px 22px;font-size:16px;line-height:1.85;color:var(--c-muted);
}

/* ============ 页脚 ============ */
.site-footer{background:var(--c-ink);color:rgba(255,255,255,.78);padding:72px 0 0;margin-top:0;}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;padding-bottom:50px;}
.brand--light .brand-text{color:#fff;}
.brand--light .brand-mark{background:#fff;}
.footer-desc{margin-top:18px;font-size:14.5px;line-height:1.85;color:rgba(255,255,255,.62);max-width:320px;}
.footer-social{display:flex;gap:10px;margin-top:22px;}
.footer-social a{
  width:38px;height:38px;display:inline-flex;align-items:center;justify-content:center;
  border:1px solid rgba(255,255,255,.2);border-radius:var(--r-xs);
  color:rgba(255,255,255,.8);
  transition:background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease);
}
.footer-social a:hover{background:var(--c-orange);border-color:var(--c-orange);color:#fff;transform:translateY(-2px);}
.footer-col h4{font-size:14px;font-weight:700;letter-spacing:.06em;color:#fff;margin-bottom:18px;}
.footer-col ul{display:flex;flex-direction:column;gap:11px;}
.footer-col a{font-size:14.5px;color:rgba(255,255,255,.68);transition:color .18s var(--ease);}
.footer-col a:hover{color:var(--c-lime);}
.footer-col li{font-size:14.5px;color:rgba(255,255,255,.68);}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.14);
  padding:24px 0 30px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13.5px;color:rgba(255,255,255,.48);
}

/* ============ 滚动进入动效 ============ */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .55s var(--ease),transform .55s var(--ease);}
.reveal.is-in{opacity:1;transform:none;}

/* ============ 响应式 ============ */
@media (max-width:1180px){
  .command-search{min-width:190px;}
  .nav-link{padding:9px 10px;font-size:14.5px;}
}
@media (max-width:1024px){
  .section{padding:80px 0;}
  .nav-links,.command-search{display:none;}
  .menu-btn{display:inline-flex;}
  .hero-inner{padding:80px 24px 72px;}
  .coll-grid{grid-template-columns:1fr 1fr;}
  .coll-card--lg{grid-column:span 2;}
  .rail-item{flex:0 0 calc((100% - 24px) / 2);}
  .rec-grid{grid-template-columns:repeat(2,1fr);}
  .filter-panel{position:static;margin-bottom:22px;}
  .cta-band{flex-direction:column;align-items:flex-start;padding:44px 34px;border-radius:var(--r-md);}
  .footer-grid{grid-template-columns:1fr 1fr;gap:34px;}
  .section-head{margin-bottom:40px;}
}
@media (max-width:640px){
  .section{padding:60px 0;}
  .container{padding:0 20px;}
  .nav-inner{height:64px;gap:12px;}
  .brand-text{font-size:17px;}
  .hero-inner{padding:62px 20px 56px;}
  .hero-title{font-size:clamp(30px,9vw,40px);}
  .hero-sub{font-size:16px;}
  .hero-actions .btn{width:100%;}
  .hero-stats{margin-top:38px;padding-top:22px;gap:20px 0;}
  .stat{padding-right:24px;margin-right:24px;border-right:0;flex:0 0 50%;}
  .coll-grid{grid-template-columns:1fr;}
  .coll-card--lg{grid-column:span 1;}
  .coll-card--lg .coll-title{font-size:22px;}
  .rail-item{flex:0 0 84%;}
  .rec-grid{grid-template-columns:1fr;}
  .cta-band{padding:34px 24px;}
  .cta-actions{width:100%;}
  .cta-actions .btn{width:100%;}
  .faq .accordion-title{font-size:16px;padding:17px 56px 17px 18px;}
  .faq .accordion-content{padding:0 18px 20px;font-size:15.5px;}
  .footer-grid{grid-template-columns:1fr;gap:30px;}
  .footer-bottom{font-size:13px;}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{animation:none !important;transition-duration:.01ms !important;}
  .reveal{opacity:1;transform:none;}
}

/* roulang page: category1 */
:root{
  --orange:#FF5A1F;
  --orange-dark:#E44A12;
  --teal:#0FA3A3;
  --teal-dark:#0B7D7D;
  --lime:#D7FF3F;
  --obsidian:#0E1112;
  --paper:#F6F4EF;
  --white:#FFFFFF;
  --line:#E4E0D8;
  --ink:#121514;
  --muted:#6A716E;
  --radius-s:8px;
  --radius-m:14px;
  --radius-l:22px;
  --shadow-s:0 1px 2px rgba(16,17,18,.06),0 12px 30px rgba(16,17,18,.08);
  --shadow-h:0 6px 16px rgba(16,17,18,.10),0 20px 44px rgba(16,17,18,.10);
  --font-cn:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:"IBM Plex Mono","Inter",ui-monospace,SFMono-Regular,Menlo,monospace;
  --container:1240px;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:var(--ink);text-decoration:none;transition:color .2s ease;}
a:hover{color:var(--orange);}
button,input{font-family:inherit;font-size:inherit;}
h1,h2,h3,h4{margin:0;font-weight:800;letter-spacing:-0.02em;line-height:1.2;color:var(--ink);}
p{margin:0 0 1.1em;}
p:last-child{margin-bottom:0;}
ul,ol{margin:0;padding:0;}
::selection{background:var(--lime);color:var(--obsidian);}
:focus-visible{outline:2px solid var(--teal);outline-offset:2px;border-radius:4px;}

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

/* ---------- header ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:var(--paper);
  border-bottom:1px solid var(--line);
  transition:box-shadow .25s ease;
}
.site-header.is-scrolled{box-shadow:0 2px 14px rgba(16,17,18,.07);}
.header-inner{
  display:flex;
  align-items:center;
  gap:26px;
  height:70px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-size:19px;
  font-weight:800;
  letter-spacing:-0.01em;
  color:var(--ink);
  flex:0 0 auto;
}
.brand:hover{color:var(--ink);}
.brand-mark{
  position:relative;
  width:28px;
  height:28px;
  border-radius:9px;
  background:linear-gradient(135deg,var(--orange) 0%,#FF8A4C 100%);
  flex:0 0 auto;
  overflow:hidden;
}
.brand-mark::before{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(135deg,transparent 42%,rgba(255,255,255,.92) 42%,rgba(255,255,255,.92) 56%,transparent 56%);
}
.brand-mark::after{
  content:"";
  position:absolute;
  left:7px;
  bottom:6px;
  width:8px;
  height:8px;
  border-radius:50%;
  background:var(--obsidian);
}
.brand-text{white-space:nowrap;}
.brand--light{color:#fff;}
.brand--light:hover{color:#fff;}

.nav-links{
  display:flex;
  align-items:center;
  gap:26px;
  margin-right:auto;
}
.nav-link{
  position:relative;
  font-size:15px;
  font-weight:600;
  color:var(--ink);
  padding:6px 0;
  white-space:nowrap;
}
.nav-link::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:2px;
  height:2px;
  background:var(--orange);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .22s ease;
}
.nav-link:hover{color:var(--orange);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.active{color:var(--orange);}
.nav-link.active::after{transform:scaleX(1);}

.header-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto;}

.command-search{
  display:flex;
  align-items:center;
  gap:9px;
  height:40px;
  width:236px;
  padding:0 10px;
  background:var(--white);
  border:1px solid var(--line);
  border-radius:10px;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.command-search:focus-within{
  border-color:var(--orange);
  box-shadow:0 0 0 3px rgba(255,90,31,.14);
}
.command-search svg{flex:0 0 auto;color:var(--muted);}
.command-search input{
  flex:1 1 auto;
  min-width:0;
  border:0;
  outline:0;
  background:transparent;
  font-size:14px;
  color:var(--ink);
}
.command-search input::placeholder{color:#9aa19d;}
.kbd{
  flex:0 0 auto;
  font-family:var(--font-mono);
  font-size:11px;
  color:var(--muted);
  border:1px solid var(--line);
  border-radius:5px;
  padding:2px 5px;
  line-height:1.2;
}
.icon-btn{
  width:40px;height:40px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  background:var(--white);
  border:1px solid var(--line);
  border-radius:10px;
  color:var(--ink);
  cursor:pointer;
  transition:border-color .2s ease,color .2s ease,transform .16s ease;
}
.icon-btn:hover{border-color:var(--orange);color:var(--orange);}
.icon-btn:active{transform:scale(.95);}
.menu-toggle{display:none;}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  font-size:15px;
  font-weight:700;
  line-height:1;
  padding:13px 20px;
  border-radius:10px;
  border:1px solid transparent;
  cursor:pointer;
  text-decoration:none;
  transition:background .2s ease,color .2s ease,border-color .2s ease,transform .18s ease,box-shadow .2s ease;
}
.btn-primary{background:var(--orange);color:#fff;}
.btn-primary:hover{background:var(--orange-dark);color:#fff;transform:translateY(-1px);box-shadow:0 10px 20px rgba(255,90,31,.26);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{background:transparent;border-color:var(--ink);color:var(--ink);}
.btn-ghost:hover{background:var(--ink);border-color:var(--ink);color:#fff;}
.btn-outline-light{background:transparent;border-color:rgba(255,255,255,.42);color:#fff;}
.btn-outline-light:hover{background:#fff;border-color:#fff;color:var(--obsidian);}
.btn-sm{padding:11px 16px;font-size:14px;}
.btn-block{width:100%;}

/* ---------- hero ---------- */
.hero{
  position:relative;
  background:url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
  color:#fff;
  overflow:hidden;
}
.hero::before{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(102deg,rgba(14,17,18,.94) 0%,rgba(14,17,18,.82) 46%,rgba(14,17,18,.48) 100%);
}
.hero::after{
  content:"";
  position:absolute;
  right:-60px;top:-40px;
  width:340px;height:340px;
  background:repeating-linear-gradient(135deg,rgba(215,255,63,.16) 0 2px,transparent 2px 22px);
  opacity:.6;
  pointer-events:none;
}
.hero-inner{
  position:relative;
  z-index:2;
  max-width:840px;
  padding:108px 0 92px;
}
.crumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:rgba(255,255,255,.62);
  margin-bottom:22px;
}
.crumb a{color:rgba(255,255,255,.78);}
.crumb a:hover{color:var(--lime);}
.crumb span.sep{color:rgba(255,255,255,.34);}
.crumb .current{color:var(--lime);}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:9px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.16em;
  color:var(--lime);
  text-transform:uppercase;
}
.eyebrow::before{
  content:"";
  width:26px;height:2px;
  background:var(--lime);
  display:inline-block;
}
.hero h1{
  color:#fff;
  font-size:clamp(34px,5.6vw,68px);
  font-weight:900;
  line-height:1.04;
  letter-spacing:-0.03em;
  margin:18px 0 20px;
}
.hero h1 em{font-style:normal;color:var(--lime);}
.hero-sub{
  max-width:620px;
  font-size:clamp(16px,1.5vw,19px);
  line-height:1.8;
  color:rgba(255,255,255,.84);
  margin-bottom:34px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;}
.hero-tags{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-top:38px;
  padding-top:26px;
  border-top:1px solid rgba(255,255,255,.18);
}
.hero-tag{
  font-size:13px;
  letter-spacing:.04em;
  color:rgba(255,255,255,.82);
  border:1px solid rgba(255,255,255,.24);
  border-radius:999px;
  padding:6px 14px;
}

/* ---------- generic section ---------- */
.section{padding:96px 0;}
.section--alt{background:var(--white);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.section-head{max-width:740px;margin-bottom:46px;}
.section-title{
  font-size:clamp(26px,3.3vw,42px);
  font-weight:800;
  line-height:1.16;
  margin:12px 0 14px;
}
.section-sub{font-size:17px;line-height:1.8;color:var(--muted);margin:0;}
.section-head--row{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:28px;
  flex-wrap:wrap;
  max-width:none;
}

.badge{
  display:inline-flex;
  align-items:center;
  font-size:12px;
  font-weight:700;
  letter-spacing:.04em;
  border-radius:999px;
  padding:4px 12px;
  background:rgba(15,163,163,.10);
  color:var(--teal-dark);
  border:1px solid rgba(15,163,163,.20);
  white-space:nowrap;
}
.badge--orange{background:rgba(255,90,31,.10);color:#C9410F;border-color:rgba(255,90,31,.22);}
.badge--dark{background:var(--obsidian);color:var(--lime);border-color:var(--obsidian);}

/* ---------- collection cards ---------- */
.coll-grid{margin-top:0;}
.coll-card{
  display:flex;
  flex-direction:column;
  height:100%;
  background:var(--white);
  border:1px solid var(--line);
  border-radius:var(--radius-m);
  overflow:hidden;
  transition:transform .2s ease,border-color .2s ease,box-shadow .2s ease;
}
.coll-card:hover{transform:translateY(-2px);border-color:var(--orange);box-shadow:var(--shadow-s);}
.coll-media{position:relative;aspect-ratio:16/9;overflow:hidden;background:#e9e6df;}
.coll-media img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease;}
.coll-card:hover .coll-media img{transform:scale(1.03);}
.coll-num{
  position:absolute;
  left:16px;top:16px;
  font-family:var(--font-mono);
  font-size:13px;
  font-weight:600;
  color:var(--lime);
  background:rgba(14,17,18,.86);
  border-radius:6px;
  padding:4px 10px;
  line-height:1.4;
}
.coll-body{
  display:flex;
  flex-direction:column;
  gap:12px;
  padding:22px 24px 26px;
  flex:1 1 auto;
}
.coll-body h3{font-size:20px;font-weight:700;line-height:1.35;}
.coll-body p{font-size:15px;line-height:1.8;color:var(--muted);}
.coll-foot{
  margin-top:auto;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding-top:8px;
}
.meta{font-family:var(--font-mono);font-size:12px;color:var(--muted);letter-spacing:.02em;}
.arrow-link{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:14px;
  font-weight:700;
  color:var(--ink);
}
.arrow-link svg{transition:transform .2s ease;}
.arrow-link:hover{color:var(--orange);}
.arrow-link:hover svg{transform:translateX(4px);}
.coll-card--lead .coll-body{padding:28px 30px 32px;}
.coll-card--lead .coll-body h3{font-size:26px;}
.coll-card--lead .coll-body p{font-size:16px;}

/* ---------- picks list ---------- */
.pick-list{list-style:none;display:grid;gap:18px;}
.pick-item{
  display:grid;
  grid-template-columns:54px 148px minmax(0,1fr);
  gap:24px;
  align-items:start;
  background:var(--white);
  border:1px solid var(--line);
  border-radius:var(--radius-m);
  padding:24px 26px;
  transition:transform .2s ease,border-color .2s ease,box-shadow .2s ease;
}
.pick-item:hover{transform:translateY(-2px);border-color:var(--orange);box-shadow:var(--shadow-s);}
.pick-index{
  font-family:var(--font-mono);
  font-size:24px;
  font-weight:600;
  color:var(--teal);
  line-height:1.1;
  letter-spacing:-0.02em;
}
.pick-thumb{aspect-ratio:4/3;border-radius:var(--radius-s);overflow:hidden;background:#e9e6df;}
.pick-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease;}
.pick-item:hover .pick-thumb img{transform:scale(1.04);}
.pick-main{display:flex;flex-direction:column;gap:10px;}
.pick-main h3{font-size:20px;font-weight:700;line-height:1.4;}
.pick-main p{font-size:15px;line-height:1.8;color:var(--muted);}
.pick-top{display:flex;align-items:center;gap:12px;flex-wrap:wrap;}

/* ---------- rhythm / timeline ---------- */
.rhythm{display:grid;gap:0;border-top:1px solid var(--line);}
.rhythm-item{
  display:grid;
  grid-template-columns:190px minmax(0,1fr);
  gap:32px;
  padding:32px 0;
  border-bottom:1px solid var(--line);
}
.rhythm-step{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.1em;
  color:var(--teal-dark);
  text-transform:uppercase;
  margin-bottom:8px;
}
.rhythm-item h3{font-size:21px;font-weight:700;line-height:1.4;margin-bottom:10px;}
.rhythm-item p{font-size:15.5px;line-height:1.85;color:var(--muted);margin:0;}
.rhythm-body{max-width:720px;}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:900px;}
.faq-accordion{border:0;background:transparent;margin:0;}
.faq-accordion .accordion-item{
  border:1px solid var(--line) !important;
  border-radius:var(--radius-m);
  background:var(--white);
  margin-bottom:12px;
  overflow:hidden;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.faq-accordion .accordion-item:hover{border-color:#cfc9bd !important;}
.faq-accordion .accordion-item.is-active{border-color:var(--orange) !important;box-shadow:var(--shadow-s);}
.faq-accordion .accordion-title{
  display:block;
  font-size:17px;
  font-weight:700;
  line-height:1.5;
  color:var(--ink);
  padding:20px 60px 20px 24px;
  border:0;
  background:transparent;
}
.faq-accordion .accordion-title:hover,
.faq-accordion .accordion-title:focus{color:var(--orange);background:transparent;}
.faq-accordion .accordion-title::before{
  content:"+";
  left:auto;
  right:24px;
  top:50%;
  margin-top:-13px;
  font-size:22px;
  font-weight:400;
  line-height:1;
  color:var(--orange);
  transition:transform .22s ease;
}
.faq-accordion .accordion-item.is-active .accordion-title::before{
  content:"+";
  transform:rotate(45deg);
}
.faq-accordion .accordion-content{
  padding:0 24px 24px;
  border:0 !important;
  background:transparent;
  font-size:15.5px;
  line-height:1.85;
  color:var(--muted);
}
.faq-accordion .accordion-content p{margin:0;}

/* ---------- CTA band ---------- */
.cta-band{
  background:var(--obsidian);
  color:#fff;
  padding:78px 0;
  position:relative;
  overflow:hidden;
}
.cta-band::after{
  content:"";
  position:absolute;
  right:-80px;bottom:-120px;
  width:380px;height:380px;
  border:1px solid rgba(255,255,255,.08);
  border-radius:50%;
  pointer-events:none;
}
.cta-inner{
  position:relative;
  z-index:2;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:40px;
  flex-wrap:wrap;
}
.cta-copy{max-width:600px;}
.cta-copy h2{color:#fff;font-size:clamp(24px,3vw,36px);font-weight:800;line-height:1.2;margin-bottom:14px;}
.cta-copy p{color:rgba(255,255,255,.72);font-size:16px;line-height:1.8;margin:0;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;}

/* ---------- footer ---------- */
.site-footer{
  background:#0B0D0E;
  color:rgba(255,255,255,.72);
  padding:76px 0 28px;
  font-size:15px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1fr;
  gap:44px;
  padding-bottom:48px;
  border-bottom:1px solid rgba(255,255,255,.10);
}
.footer-brand .brand{margin-bottom:18px;}
.footer-desc{font-size:14.5px;line-height:1.85;color:rgba(255,255,255,.62);max-width:340px;}
.footer-social{display:flex;gap:10px;margin-top:22px;}
.footer-social a{
  width:36px;height:36px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  border:1px solid rgba(255,255,255,.16);
  border-radius:9px;
  color:rgba(255,255,255,.72);
  transition:border-color .2s ease,color .2s ease,background .2s ease;
}
.footer-social a:hover{border-color:var(--orange);color:#fff;background:rgba(255,90,31,.16);}
.footer-col h4{
  font-size:14px;
  font-weight:700;
  color:#fff;
  letter-spacing:.06em;
  margin-bottom:18px;
}
.footer-col ul{list-style:none;display:grid;gap:11px;}
.footer-col a{font-size:14.5px;color:rgba(255,255,255,.66);}
.footer-col a:hover{color:var(--lime);}
.footer-bottom{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  padding-top:24px;
  font-size:13px;
  color:rgba(255,255,255,.46);
}
.footer-bottom p{margin:0;}

/* ---------- mobile drawer ---------- */
.mobile-drawer{
  position:fixed;
  inset:0;
  z-index:120;
  visibility:hidden;
  pointer-events:none;
}
.mobile-drawer.is-open{visibility:visible;pointer-events:auto;}
.drawer-mask{
  position:absolute;
  inset:0;
  background:rgba(14,17,18,.5);
  opacity:0;
  transition:opacity .25s ease;
}
.mobile-drawer.is-open .drawer-mask{opacity:1;}
.drawer-panel{
  position:absolute;
  top:0;right:0;
  width:min(88vw,360px);
  height:100%;
  background:var(--white);
  padding:22px 24px 32px;
  display:flex;
  flex-direction:column;
  gap:22px;
  transform:translateX(101%);
  transition:transform .28s ease;
  overflow-y:auto;
}
.mobile-drawer.is-open .drawer-panel{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;gap:16px;}
.drawer-close{
  width:38px;height:38px;
  border:1px solid var(--line);
  border-radius:10px;
  background:transparent;
  font-size:20px;
  line-height:1;
  color:var(--ink);
  cursor:pointer;
}
.drawer-close:hover{border-color:var(--orange);color:var(--orange);}
.drawer-nav{display:grid;gap:4px;}
.drawer-nav a{
  display:block;
  font-size:17px;
  font-weight:700;
  padding:14px 2px;
  border-bottom:1px solid var(--line);
}
.drawer-nav a.active{color:var(--orange);}
.command-search--drawer{width:100%;height:44px;}

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

/* ---------- responsive ---------- */
@media (max-width:1100px){
  .command-search{width:190px;}
  .nav-links{gap:20px;}
}
@media (max-width:1024px){
  .container{padding:0 24px;}
  .nav-links{display:none;}
  .command-search{display:none;}
  .icon-btn{display:none;}
  .header-actions .btn-primary{display:none;}
  .menu-toggle{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    width:40px;height:40px;
    border:1px solid var(--line);
    border-radius:10px;
    background:var(--white);
    cursor:pointer;
    color:var(--ink);
  }
  .section{padding:76px 0;}
  .hero-inner{padding:84px 0 72px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px;}
  .pick-item{grid-template-columns:44px minmax(0,1fr);}
  .pick-thumb{display:none;}
  .rhythm-item{grid-template-columns:1fr;gap:12px;padding:26px 0;}
}
@media (max-width:640px){
  .container{padding:0 20px;}
  .header-inner{height:62px;gap:14px;}
  .brand{font-size:17px;}
  .brand-mark{width:25px;height:25px;border-radius:8px;}
  .section{padding:58px 0;}
  .hero-inner{padding:64px 0 58px;}
  .hero-actions .btn{width:100%;}
  .hero-tags{margin-top:28px;}
  .section-head{margin-bottom:32px;}
  .coll-card--lead .coll-body h3{font-size:22px;}
  .pick-item{padding:20px;gap:16px;}
  .pick-index{font-size:19px;}
  .cta-band{padding:58px 0;}
  .cta-actions{width:100%;}
  .cta-actions .btn{width:100%;}
  .footer-grid{grid-template-columns:1fr;gap:32px;padding-bottom:34px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;scroll-behavior:auto !important;}
  .reveal{opacity:1;transform:none;}
}

/* roulang page: article */
:root{
  --orange:#FF5A1F;
  --orange-dark:#DC4408;
  --teal:#0FA3A3;
  --teal-dark:#0A7C7C;
  --lime:#D7FF3F;
  --ink:#0E1112;
  --paper:#F6F4EF;
  --white:#FFFFFF;
  --line:#E4E0D8;
  --text:#121514;
  --muted:#6A716E;
  --r-sm:8px;
  --r-md:14px;
  --r-lg:22px;
  --shadow-sm:0 1px 2px rgba(16,17,18,.06),0 12px 30px rgba(16,17,18,.07);
  --shadow-lg:0 2px 6px rgba(16,17,18,.08),0 20px 44px rgba(16,17,18,.12);
  --ease:cubic-bezier(.22,.61,.36,1);
  --mono:"IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --sans:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--sans);
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{display:block;max-width:100%;height:auto;}
a{color:inherit;text-decoration:none;transition:color .18s var(--ease);}
button{font-family:inherit;font-size:inherit;color:inherit;background:none;border:0;cursor:pointer;padding:0;}
input{font-family:inherit;}
h1,h2,h3,h4,p,ul,ol{margin:0;}
ul,ol{padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--teal);outline-offset:2px;}
::selection{background:var(--orange);color:#fff;}

/* ---------- 布局容器与栅格 ---------- */
.container{
  width:100%;
  max-width:1240px;
  margin-left:auto;
  margin-right:auto;
  padding-left:32px;
  padding-right:32px;
}
.grid-x.gutter-x{margin-left:-14px;margin-right:-14px;}
.grid-x.gutter-x > .cell{padding-left:14px;padding-right:14px;}

/* ---------- 顶部进度条 ---------- */
.read-progress{
  position:fixed;top:0;left:0;height:3px;width:0;
  background:linear-gradient(90deg,var(--orange),var(--teal));
  z-index:80;transition:width .1s linear;
}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:70;
  background:rgba(246,244,239,.97);
  border-bottom:1px solid var(--line);
  transition:box-shadow .22s var(--ease),background .22s var(--ease);
}
.site-header.is-stuck{box-shadow:0 8px 26px rgba(16,17,18,.09);background:rgba(255,255,255,.98);}
.header-inner{display:flex;align-items:center;gap:22px;height:72px;}
.brand{
  display:inline-flex;align-items:center;gap:10px;
  font-weight:900;font-size:19px;letter-spacing:-.01em;color:var(--ink);
  flex:0 0 auto;
}
.brand:hover{color:var(--ink);}
.brand-mark{
  width:26px;height:26px;border-radius:8px;background:var(--orange);
  position:relative;display:inline-block;flex:0 0 auto;
  box-shadow:0 6px 14px rgba(255,90,31,.32);
}
.brand-mark::before{
  content:"";position:absolute;width:9px;height:9px;border:3px solid #fff;border-radius:50%;
  top:5px;left:5px;
}
.brand-mark::after{
  content:"";position:absolute;width:11px;height:3px;background:#fff;border-radius:2px;
  bottom:6px;right:4px;transform:skewX(-24deg);
}
.brand--light{color:#fff;}
.brand--light:hover{color:#fff;}

.nav-links{display:flex;align-items:center;gap:4px;}
.nav-link{
  position:relative;padding:8px 12px;border-radius:var(--r-sm);
  font-size:14.5px;font-weight:600;color:#3A403E;
}
.nav-link::after{
  content:"";position:absolute;left:12px;right:12px;bottom:3px;height:2px;
  background:var(--orange);border-radius:2px;transform:scaleX(0);transform-origin:left;
  transition:transform .22s var(--ease);
}
.nav-link:hover{color:var(--orange);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.active{color:var(--orange);}
.nav-link.active::after{transform:scaleX(1);}

.header-tools{margin-left:auto;display:flex;align-items:center;gap:10px;}
.command-search{
  display:flex;align-items:center;gap:8px;
  height:40px;padding:0 10px 0 12px;min-width:238px;
  background:#fff;border:1px solid var(--line);border-radius:10px;
  transition:border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.command-search:hover{border-color:#CFC9BE;}
.command-search:focus-within{border-color:var(--orange);box-shadow:0 0 0 3px rgba(255,90,31,.14);}
.search-ico{color:var(--muted);flex:0 0 auto;}
.command-search input{
  flex:1 1 auto;min-width:0;border:0;outline:none;background:transparent;
  font-size:14px;color:var(--text);
}
.command-search input::placeholder{color:#9AA19D;}
.kbd{
  flex:0 0 auto;font-family:var(--mono);font-size:11px;color:var(--muted);
  border:1px solid var(--line);border-radius:5px;padding:1px 5px;background:var(--paper);
}
.icon-btn{
  width:38px;height:38px;border-radius:10px;border:1px solid var(--line);background:#fff;
  display:inline-flex;align-items:center;justify-content:center;color:var(--muted);
  transition:color .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease);
}
.icon-btn:hover{color:var(--orange);border-color:var(--orange);transform:translateY(-1px);}
.icon-btn.is-on{color:#fff;background:var(--orange);border-color:var(--orange);}
.menu-toggle{
  display:none;width:40px;height:38px;border-radius:10px;border:1px solid var(--line);background:#fff;
  flex-direction:column;align-items:center;justify-content:center;gap:4px;
}
.menu-toggle span{display:block;width:17px;height:2px;background:var(--ink);border-radius:2px;transition:transform .2s var(--ease);}
.menu-toggle:hover span{background:var(--orange);}

/* ---------- 移动端抽屉 ---------- */
.drawer-mask{
  position:fixed;inset:0;background:rgba(14,17,18,.5);
  opacity:0;pointer-events:none;transition:opacity .25s var(--ease);z-index:88;
}
.drawer-mask.is-open{opacity:1;pointer-events:auto;}
.mobile-drawer{
  position:fixed;top:0;right:0;bottom:0;width:86%;max-width:370px;
  background:#fff;z-index:89;padding:20px 20px 28px;overflow-y:auto;
  transform:translateX(102%);transition:transform .3s var(--ease);
  display:flex;flex-direction:column;gap:18px;
}
.mobile-drawer.is-open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;}
.drawer-close{
  width:36px;height:36px;border-radius:10px;border:1px solid var(--line);
  font-size:20px;line-height:1;color:var(--muted);
}
.drawer-close:hover{color:var(--orange);border-color:var(--orange);}
.drawer-search{width:100%;min-width:0;}
.drawer-nav{display:flex;flex-direction:column;border-top:1px solid var(--line);}
.drawer-nav a{
  padding:14px 2px;font-size:16.5px;font-weight:700;color:var(--ink);
  border-bottom:1px solid var(--line);
}
.drawer-nav a:hover{color:var(--orange);padding-left:6px;}
.drawer-actions{display:flex;gap:10px;}
.drawer-actions .btn{flex:1 1 0;}
.drawer-cta{width:100%;}
.drawer-note{font-size:12.5px;color:var(--muted);line-height:1.7;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 20px;border-radius:10px;border:1px solid transparent;
  font-size:15px;font-weight:700;white-space:nowrap;
  transition:transform .18s var(--ease),background .18s var(--ease),color .18s var(--ease),
             border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.btn-primary{background:var(--orange);color:#fff;}
.btn-primary:hover{background:var(--orange-dark);color:#fff;transform:translateY(-1px);box-shadow:0 12px 24px rgba(255,90,31,.28);}
.btn-primary:active{transform:translateY(0);}
.btn-outline{background:#fff;border-color:var(--line);color:var(--ink);}
.btn-outline:hover{background:var(--ink);border-color:var(--ink);color:#fff;transform:translateY(-1px);}
.btn-ghost{background:transparent;border-color:rgba(255,255,255,.45);color:#fff;}
.btn-ghost:hover{background:#fff;border-color:#fff;color:var(--ink);transform:translateY(-1px);}
.btn-sm{height:38px;padding:0 16px;font-size:14px;}
.btn-block{width:100%;}

/* ---------- 徽章 / 标签 ---------- */
.badge{
  display:inline-flex;align-items:center;height:24px;padding:0 11px;border-radius:999px;
  font-size:12px;font-weight:700;letter-spacing:.04em;line-height:1;
}
.badge-teal{background:rgba(15,163,163,.12);color:var(--teal-dark);}
.badge-orange{background:rgba(255,90,31,.13);color:var(--orange-dark);}
.badge-lime{background:rgba(215,255,63,.55);color:#4E5C00;}
.badge-dark{background:rgba(255,255,255,.14);color:#fff;}

/* ---------- 文章头图 ---------- */
.article-hero{
  position:relative;overflow:hidden;color:#fff;
  background:var(--ink) url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
  padding:40px 0 54px;
}
.article-hero::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(14,17,18,.80),rgba(14,17,18,.93));
}
.article-hero::after{
  content:"";position:absolute;right:-80px;top:-70px;width:340px;height:340px;
  background:repeating-linear-gradient(115deg,rgba(255,90,31,.5) 0 6px,transparent 6px 24px);
  transform:skewX(-12deg);opacity:.32;pointer-events:none;
}
.article-hero .container{position:relative;z-index:1;}
.breadcrumb{
  display:flex;align-items:center;flex-wrap:wrap;gap:8px;
  font-size:13px;color:rgba(255,255,255,.62);margin-bottom:22px;
}
.breadcrumb a{color:rgba(255,255,255,.8);}
.breadcrumb a:hover{color:var(--orange);}
.breadcrumb .sep{color:rgba(255,255,255,.34);}
.crumb-current{color:rgba(255,255,255,.66);max-width:520px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.hero-tags{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:16px;}
.article-title{
  font-size:clamp(30px,4.4vw,52px);
  line-height:1.14;font-weight:900;letter-spacing:-.02em;
  max-width:920px;color:#fff;
}
.article-meta{
  display:flex;align-items:center;flex-wrap:wrap;gap:14px;
  margin-top:26px;font-size:14px;color:rgba(255,255,255,.72);
}
.meta-divider{width:1px;height:14px;background:rgba(255,255,255,.24);}
.meta-actions{display:flex;gap:10px;margin-left:auto;}
.pill-btn{
  height:36px;padding:0 16px;border-radius:999px;
  border:1px solid rgba(255,255,255,.32);color:#fff;font-size:13.5px;font-weight:700;
  transition:background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.pill-btn:hover{background:#fff;color:var(--ink);border-color:#fff;}
.pill-btn.is-on{background:var(--orange);border-color:var(--orange);color:#fff;}

/* ---------- 正文与侧栏 ---------- */
.article-section{padding:52px 0 84px;}
.prose{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
  padding:42px 46px;box-shadow:var(--shadow-sm);
  max-width:100%;
}
.prose > *:first-child{margin-top:0;}
.prose h2{
  font-size:clamp(23px,2.3vw,29px);font-weight:800;line-height:1.3;
  margin:44px 0 16px;color:var(--ink);
}
.prose h2::before{
  content:"";display:block;width:38px;height:4px;border-radius:2px;
  background:var(--orange);margin-bottom:14px;
}
.prose h3{font-size:21px;font-weight:700;line-height:1.4;margin:32px 0 12px;color:var(--ink);}
.prose h4{font-size:18px;font-weight:700;margin:24px 0 10px;color:var(--ink);}
.prose p{font-size:17.5px;line-height:1.9;color:#1B1F1E;margin:0 0 1.2em;}
.prose a{color:var(--orange);text-decoration:underline;text-underline-offset:3px;}
.prose a:hover{color:var(--orange-dark);}
.prose strong{font-weight:800;color:var(--ink);}
.prose ul,.prose ol{margin:0 0 1.35em;}
.prose ul li{
  position:relative;padding-left:24px;margin-bottom:10px;
  font-size:17px;line-height:1.85;color:#1B1F1E;
}
.prose ul li::before{
  content:"";position:absolute;left:4px;top:12px;width:7px;height:7px;
  background:var(--teal);border-radius:2px;transform:rotate(45deg);
}
.prose ol{counter-reset:item;}
.prose ol li{
  position:relative;padding-left:36px;margin-bottom:10px;
  font-size:17px;line-height:1.85;color:#1B1F1E;counter-increment:item;
}
.prose ol li::before{
  content:counter(item,decimal-leading-zero);
  position:absolute;left:0;top:3px;font-family:var(--mono);font-size:13px;
  font-weight:700;color:var(--orange);
}
.prose blockquote{
  margin:28px 0;padding:18px 22px;background:var(--paper);
  border-left:4px solid var(--orange);border-radius:0 var(--r-md) var(--r-md) 0;
  color:#2A302E;
}
.prose blockquote p{font-size:16.5px;margin-bottom:0;}
.prose img{border-radius:12px;margin:26px 0;width:100%;}
.prose figure{margin:26px 0;}
.prose figcaption{font-size:13.5px;color:var(--muted);text-align:center;margin-top:10px;}
.prose table{
  width:100%;border-collapse:separate;border-spacing:0;margin:26px 0;
  border:1px solid var(--line);border-radius:12px;overflow:hidden;font-size:15.5px;
}
.prose thead th{
  background:var(--ink);color:#fff;text-align:left;padding:12px 16px;font-weight:700;
}
.prose tbody td{padding:12px 16px;border-top:1px solid var(--line);color:#2A302E;}
.prose tbody tr:nth-child(even) td{background:#FBFAF7;}
.prose code{
  font-family:var(--mono);font-size:14px;background:var(--paper);
  border:1px solid var(--line);border-radius:6px;padding:1px 6px;
}
.prose hr{border:0;border-top:1px solid var(--line);margin:34px 0;}

.empty-state{
  text-align:center;padding:56px 20px;display:flex;flex-direction:column;align-items:center;gap:14px;
}
.empty-state svg{color:var(--orange);}
.empty-state h2{font-size:26px;font-weight:900;color:var(--ink);}
.empty-state p{font-size:16px;color:var(--muted);margin-bottom:8px;}

/* ---------- 侧栏 ---------- */
.sidebar{display:flex;flex-direction:column;gap:20px;}
.side-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
  padding:22px;box-shadow:var(--shadow-sm);
}
.side-title{
  display:flex;align-items:center;gap:9px;
  font-size:15px;font-weight:800;letter-spacing:.04em;margin-bottom:16px;color:var(--ink);
}
.side-title::before{
  content:"";width:4px;height:16px;border-radius:2px;background:var(--orange);
}
.toc-nav{display:flex;flex-direction:column;}
.toc-nav a{
  display:block;font-size:14.5px;color:var(--muted);line-height:1.55;
  padding:8px 0 8px 14px;border-left:2px solid var(--line);
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.toc-nav a:hover{color:var(--orange);border-left-color:var(--orange);}
.toc-nav a.is-active{color:var(--orange);border-left-color:var(--orange);font-weight:700;}
.toc-nav a.toc-h3{padding-left:28px;font-size:13.5px;}
.hot-list{display:flex;flex-direction:column;}
.hot-list li + li{margin-top:14px;padding-top:14px;border-top:1px dashed var(--line);}
.hot-item{display:flex;gap:12px;align-items:flex-start;}
.hot-num{
  font-family:var(--mono);font-size:13px;font-weight:700;color:var(--orange);
  flex:0 0 auto;padding-top:2px;letter-spacing:.04em;
}
.hot-body{display:flex;flex-direction:column;gap:4px;}
.hot-title{font-size:14.5px;font-weight:700;line-height:1.5;color:var(--ink);}
.hot-item:hover .hot-title{color:var(--orange);}
.hot-sub{font-size:12.5px;color:var(--muted);}
.side-cta{border-left:4px solid var(--orange);}
.side-cta-text{font-size:14.5px;color:var(--muted);line-height:1.75;margin-bottom:16px;}
.side-cta-actions{display:flex;flex-direction:column;gap:10px;}

/* ---------- 文末 CTA ---------- */
.article-foot{margin-top:26px;display:flex;flex-direction:column;gap:20px;}
.cta-band{
  background:var(--ink);color:#fff;border-radius:var(--r-lg);
  padding:32px 34px;display:flex;align-items:center;justify-content:space-between;
  gap:24px;flex-wrap:wrap;position:relative;overflow:hidden;
}
.cta-band::after{
  content:"";position:absolute;right:-40px;bottom:-60px;width:220px;height:220px;
  background:repeating-linear-gradient(115deg,rgba(215,255,63,.28) 0 5px,transparent 5px 20px);
  transform:skewX(-14deg);opacity:.4;pointer-events:none;
}
.cta-band-text{position:relative;z-index:1;max-width:520px;}
.cta-band-text h2{font-size:24px;font-weight:900;line-height:1.3;margin-bottom:8px;color:#fff;}
.cta-band-text p{font-size:14.5px;color:#A9B0AC;line-height:1.7;margin:0;}
.cta-band-actions{position:relative;z-index:1;display:flex;gap:10px;flex-wrap:wrap;}
.back-link{
  font-size:14.5px;font-weight:700;color:var(--muted);
  transition:color .18s var(--ease),transform .18s var(--ease);align-self:flex-start;
}
.back-link:hover{color:var(--orange);transform:translateX(-3px);}

/* ---------- 相关推荐 ---------- */
.related-section{padding:0 0 96px;}
.section-head{
  display:flex;align-items:flex-end;justify-content:space-between;gap:20px;
  margin-bottom:30px;flex-wrap:wrap;
}
.eyebrow{
  display:inline-block;font-family:var(--mono);font-size:12.5px;letter-spacing:.14em;
  color:var(--teal-dark);font-weight:700;margin-bottom:10px;text-transform:uppercase;
}
.section-head h2{font-size:clamp(24px,2.6vw,34px);font-weight:900;letter-spacing:-.02em;color:var(--ink);}
.link-arrow{font-size:14.5px;font-weight:700;color:var(--muted);}
.link-arrow:hover{color:var(--orange);}
.card{
  display:flex;flex-direction:column;height:100%;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
  overflow:hidden;
  transition:transform .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.card:hover{transform:translateY(-2px);border-color:var(--orange);box-shadow:var(--shadow-lg);}
.card-media{aspect-ratio:16/9;overflow:hidden;background:var(--paper);}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .3s var(--ease);}
.card:hover .card-media img{transform:scale(1.03);}
.card-body{padding:18px 20px 22px;display:flex;flex-direction:column;gap:10px;flex:1 1 auto;}
.card-title{font-size:17px;font-weight:800;line-height:1.45;color:var(--ink);}
.card:hover .card-title{color:var(--orange);}
.card-desc{font-size:14.5px;line-height:1.75;color:var(--muted);margin:0;}
.card-meta{
  margin-top:auto;font-family:var(--mono);font-size:12.5px;color:#9AA19D;
  letter-spacing:.03em;padding-top:6px;
}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink);color:#C9CFCB;padding:66px 0 0;}
.footer-grid{
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:38px;
}
.footer-desc{
  font-size:14.5px;line-height:1.85;color:#9DA5A1;margin:16px 0 18px;max-width:340px;
}
.footer-social{display:flex;gap:10px;}
.footer-social a{
  width:34px;height:34px;border-radius:10px;border:1px solid rgba(255,255,255,.14);
  display:inline-flex;align-items:center;justify-content:center;color:#C9CFCB;
  transition:border-color .18s var(--ease),color .18s var(--ease),transform .18s var(--ease);
}
.footer-social a:hover{border-color:var(--orange);color:var(--orange);transform:translateY(-1px);}
.footer-col h4{
  font-size:14px;font-weight:800;letter-spacing:.08em;color:#fff;margin-bottom:16px;
}
.footer-col ul{display:flex;flex-direction:column;gap:10px;}
.footer-col a{font-size:14.5px;color:#C9CFCB;}
.footer-col a:hover{color:var(--orange);}
.footer-contact p{font-size:14.5px;line-height:1.8;color:#9DA5A1;margin-bottom:10px;}
.footer-site{font-family:var(--mono);font-size:13px;color:#7C8481;letter-spacing:.03em;}
.footer-bottom{
  margin-top:52px;padding:22px 0;border-top:1px solid rgba(255,255,255,.1);
  display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;
  font-size:13.5px;color:#8B938F;
}

/* ---------- 提示 ---------- */
.toast{
  position:fixed;left:50%;bottom:34px;transform:translate(-50%,16px);
  background:var(--ink);color:#fff;font-size:14px;padding:12px 22px;
  border-radius:999px;opacity:0;pointer-events:none;z-index:95;
  transition:opacity .26s var(--ease),transform .26s var(--ease);
  box-shadow:0 16px 34px rgba(16,17,18,.3);
}
.toast.is-on{opacity:1;transform:translate(-50%,0);}

/* ---------- 动效 ---------- */
.reveal{transition:opacity .55s var(--ease),transform .55s var(--ease);}
.js-ready .reveal{opacity:0;transform:translateY(12px);}
.js-ready .reveal.is-visible{opacity:1;transform:none;}

/* ---------- 响应式 ---------- */
@media screen and (min-width:1025px){
  .sidebar{position:sticky;top:92px;}
}
@media screen and (max-width:1024px){
  .container{padding-left:24px;padding-right:24px;}
  .nav-links{display:none;}
  .command-search{display:none;}
  .menu-toggle{display:inline-flex;}
  .prose{padding:34px 30px;border-radius:var(--r-md);}
  .article-hero{padding:32px 0 44px;}
  .article-section{padding:40px 0 66px;}
  .related-section{padding-bottom:74px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px;}
  .sidebar{margin-top:26px;}
  .cta-band{padding:28px 26px;}
}
@media screen and (max-width:640px){
  .container{padding-left:20px;padding-right:20px;}
  .header-inner{height:64px;gap:14px;}
  .brand{font-size:17px;}
  .brand-mark{width:23px;height:23px;}
  .brand-mark::before{width:8px;height:8px;top:4px;left:4px;}
  .header-cta{display:none;}
  .icon-btn{width:36px;height:36px;}
  .article-title{font-size:clamp(26px,8vw,34px);}
  .hero-tags{margin-bottom:12px;}
  .article-meta{gap:10px;font-size:13px;margin-top:20px;}
  .meta-actions{margin-left:0;width:100%;}
  .pill-btn{flex:1 1 0;}
  .prose{padding:24px 20px;border-radius:var(--r-md);}
  .prose p,.prose ul li,.prose ol li{font-size:16.5px;}
  .prose h2{margin-top:34px;}
  .cta-band{flex-direction:column;align-items:stretch;}
  .cta-band-actions{flex-direction:column;}
  .cta-band-actions .btn{width:100%;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .article-hero::after{display:none;}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{transition:none!important;animation:none!important;}
  .js-ready .reveal{opacity:1;transform:none;}
  html{scroll-behavior:auto;}
}

/* roulang page: category2 */
:root{
  --orange:#FF5A1F;
  --orange-dark:#D9440C;
  --teal:#0FA3A3;
  --lime:#D7FF3F;
  --ink:#0E1112;
  --paper:#F6F4EF;
  --white:#FFFFFF;
  --line:#E4E0D8;
  --text:#121514;
  --muted:#6A716E;
  --radius-s:8px;
  --radius-m:14px;
  --radius-l:22px;
  --shadow-s:0 1px 2px rgba(16,17,18,.06),0 12px 30px rgba(16,17,18,.08);
  --shadow-hover:0 2px 4px rgba(16,17,18,.08),0 18px 40px rgba(16,17,18,.12);
  --gg:16px;
  --ease:.2s ease;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--paper);
  color:var(--text);
  font-family:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,Arial,sans-serif;
  font-size:17px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none;transition:color var(--ease),border-color var(--ease)}
a:focus-visible,button:focus-visible,input:focus-visible{outline:2px solid var(--teal);outline-offset:2px}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;line-height:1.18;letter-spacing:-.01em}
p{margin:0 0 1.1em}
p:last-child{margin-bottom:0}
::selection{background:var(--orange);color:#fff}

.container{width:100%;max-width:1240px;margin:0 auto;padding:0 40px}
.section{padding:96px 0}
.section--tight{padding:72px 0}
.section--white{background:var(--white)}
.section--ink{background:var(--ink);color:#EDEBE6}

/* ---------- Foundation 网格兜底 ---------- */
.grid-x{display:flex;flex-wrap:wrap;margin-left:calc(var(--gg) * -1);margin-right:calc(var(--gg) * -1)}
.grid-x>.cell{flex:0 0 auto;min-width:0;width:100%;padding-left:var(--gg);padding-right:var(--gg)}
.grid-x.align-middle{align-items:center}
.grid-x.align-stretch{align-items:stretch}
.small-12{width:100%}
@media (min-width:641px){
  .medium-6{width:50%}
  .medium-4{width:33.3333%}
  .medium-8{width:66.6667%}
  .medium-12{width:100%}
}
@media (min-width:1025px){
  .large-3{width:25%}
  .large-4{width:33.3333%}
  .large-5{width:41.6667%}
  .large-6{width:50%}
  .large-7{width:58.3333%}
  .large-8{width:66.6667%}
  .large-9{width:75%}
}

/* ---------- 头部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(246,244,239,.96);
  border-bottom:1px solid var(--line);
  transition:box-shadow var(--ease),background var(--ease);
}
.site-header.is-scrolled{box-shadow:0 6px 24px rgba(16,17,18,.07);background:#fff}
.header-inner{display:flex;align-items:center;gap:28px;height:70px}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{
  width:26px;height:26px;border-radius:7px;position:relative;
  background:linear-gradient(135deg,var(--orange) 0%,var(--orange) 52%,var(--ink) 52%,var(--ink) 100%);
  transform:skewX(-8deg);
}
.brand-mark::after{
  content:"";position:absolute;right:4px;bottom:4px;width:8px;height:8px;border-radius:2px;background:var(--lime);
}
.brand-text{font-size:19px;font-weight:900;letter-spacing:-.02em;color:var(--ink)}
.brand--light .brand-text{color:#fff}
.nav-links{display:flex;align-items:center;gap:6px;flex:1 1 auto}
.nav-link{
  position:relative;padding:8px 14px;font-size:14.5px;font-weight:600;color:var(--text);border-radius:var(--radius-s);
}
.nav-link::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;background:var(--orange);
  transform:scaleX(0);transform-origin:left;transition:transform var(--ease);
}
.nav-link:hover{color:var(--orange)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.active{color:var(--orange)}
.nav-link.active::after{transform:scaleX(1)}
.header-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.command-search{
  display:flex;align-items:center;gap:8px;height:40px;padding:0 12px;
  background:#fff;border:1px solid var(--line);border-radius:10px;width:280px;
  transition:border-color var(--ease),box-shadow var(--ease);
}
.command-search:focus-within{border-color:var(--orange);box-shadow:0 0 0 3px rgba(255,90,31,.12)}
.command-search i{color:var(--muted);font-size:14px}
.command-search input{
  flex:1 1 auto;border:0;background:transparent;font-size:14px;color:var(--text);min-width:0;
}
.command-search input::placeholder{color:#9AA09D}
.kbd{
  font-family:"IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
  font-size:11px;color:var(--muted);border:1px solid var(--line);border-radius:6px;padding:1px 6px;background:var(--paper);
}
.icon-btn{
  width:38px;height:38px;border:1px solid var(--line);border-radius:10px;background:#fff;
  display:inline-flex;align-items:center;justify-content:center;color:var(--text);
  transition:border-color var(--ease),color var(--ease),transform var(--ease);
}
.icon-btn:hover{border-color:var(--orange);color:var(--orange)}
.icon-btn:active{transform:scale(.94)}
.menu-toggle{display:none;width:40px;height:40px;border:1px solid var(--line);border-radius:10px;background:#fff;align-items:center;justify-content:center}
.menu-toggle span{display:block;width:16px;height:2px;background:var(--ink);position:relative}
.menu-toggle span::before,.menu-toggle span::after{content:"";position:absolute;left:0;width:16px;height:2px;background:var(--ink)}
.menu-toggle span::before{top:-5px}
.menu-toggle span::after{top:5px}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 22px;border-radius:10px;font-size:15px;font-weight:700;
  border:1px solid transparent;cursor:pointer;transition:all var(--ease);white-space:nowrap;
}
.btn-primary{background:var(--orange);color:#fff;box-shadow:0 1px 2px rgba(255,90,31,.25)}
.btn-primary:hover{background:var(--orange-dark);transform:translateY(-1px);box-shadow:0 10px 22px rgba(217,68,12,.25);color:#fff}
.btn-ghost{background:transparent;border-color:rgba(14,17,18,.28);color:var(--text)}
.btn-ghost:hover{background:var(--ink);border-color:var(--ink);color:#fff}
.btn-line{background:transparent;border-color:rgba(255,255,255,.32);color:#fff}
.btn-line:hover{background:#fff;color:var(--ink);border-color:#fff}
.btn-sm{padding:9px 16px;font-size:14px}
.btn-block{width:100%}

/* ---------- Hero ---------- */
.cat-hero{
  position:relative;overflow:hidden;background:var(--ink);color:#fff;
  padding:78px 0 68px;
}
.cat-hero__bg{
  position:absolute;inset:0;
  background-image:linear-gradient(100deg,rgba(14,17,18,.94) 0%,rgba(14,17,18,.78) 46%,rgba(14,17,18,.5) 100%),url("/assets/images/backpic/back-2.webp");
  background-size:cover;background-position:center;
}
.cat-hero__inner{position:relative;z-index:2;max-width:960px}
.crumb{font-size:13px;color:rgba(255,255,255,.72);letter-spacing:.02em;margin-bottom:18px}
.crumb a:hover{color:var(--lime)}
.crumb span.sep{margin:0 8px;opacity:.6}
.crumb strong{color:var(--lime);font-weight:600}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;font-size:12.5px;letter-spacing:.08em;font-weight:700;
  color:var(--lime);border:1px solid rgba(215,255,63,.4);border-radius:999px;padding:5px 14px;margin-bottom:20px;
}
.cat-hero h1{
  font-size:clamp(34px,4.6vw,58px);font-weight:900;line-height:1.05;letter-spacing:-.03em;margin-bottom:18px;
}
.cat-hero h1 em{font-style:normal;color:var(--orange)}
.cat-hero__lead{font-size:17.5px;line-height:1.8;color:rgba(255,255,255,.86);max-width:720px;margin-bottom:28px}
.cat-hero__meta{display:flex;flex-wrap:wrap;gap:12px 30px;font-size:13.5px;color:rgba(255,255,255,.72)}
.cat-hero__meta b{color:#fff;font-family:"IBM Plex Mono",ui-monospace,monospace;font-weight:600;margin-right:6px}

/* ---------- 双栏：左粘性目录 + 右清单 ---------- */
.layout-split{display:flex;gap:44px;align-items:flex-start}
.side-nav{
  position:sticky;top:96px;flex:0 0 288px;width:288px;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-m);padding:22px;box-shadow:var(--shadow-s);
}
.side-nav__title{
  font-size:12.5px;letter-spacing:.1em;font-weight:800;color:var(--muted);margin-bottom:14px;
}
.side-nav ol{counter-reset:side}
.side-nav li{counter-increment:side;border-top:1px solid var(--line)}
.side-nav li:first-child{border-top:0}
.side-nav a{
  display:flex;align-items:baseline;gap:10px;padding:11px 2px;font-size:14.5px;font-weight:600;color:var(--text);
}
.side-nav a::before{
  content:counter(side,decimal-leading-zero);
  font-family:"IBM Plex Mono",ui-monospace,monospace;font-size:11.5px;color:var(--muted);font-weight:600;
}
.side-nav a:hover,.side-nav a.active{color:var(--orange)}
.side-nav a:hover::before,.side-nav a.active::before{color:var(--orange)}
.side-nav__foot{margin-top:18px;padding-top:16px;border-top:1px solid var(--line)}
.side-nav__foot p{font-size:13px;color:var(--muted);line-height:1.65;margin-bottom:12px}
.side-main{flex:1 1 auto;min-width:0}

.block-head{margin-bottom:34px;max-width:760px}
.block-head .kicker{
  display:inline-flex;align-items:center;gap:8px;font-size:12.5px;font-weight:800;letter-spacing:.1em;
  color:var(--orange);margin-bottom:12px;
}
.block-head .kicker::before{content:"";width:22px;height:2px;background:var(--orange);display:block}
.block-head h2{font-size:clamp(26px,3vw,38px);font-weight:800;margin-bottom:12px}
.block-head p{font-size:16px;color:var(--muted);max-width:660px}

/* 编号清单 */
.num-list{display:flex;flex-direction:column;gap:18px}
.num-item{
  display:grid;grid-template-columns:78px 1fr;gap:22px;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-m);padding:24px 26px;
  transition:border-color var(--ease),transform var(--ease),box-shadow var(--ease);
}
.num-item:hover{border-color:var(--orange);transform:translateY(-2px);box-shadow:var(--shadow-hover)}
.num-item__no{
  font-family:"IBM Plex Mono",ui-monospace,monospace;font-size:30px;font-weight:700;line-height:1;
  color:var(--line);
}
.num-item:hover .num-item__no{color:var(--orange)}
.num-item h3{font-size:20.5px;font-weight:800;margin-bottom:8px}
.num-item p{font-size:15.5px;color:#3C4240;line-height:1.78;margin-bottom:12px}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:12px}
.tag{
  display:inline-flex;align-items:center;font-size:12.5px;font-weight:700;letter-spacing:.02em;
  padding:4px 11px;border-radius:999px;background:rgba(15,163,163,.1);color:#0B7F7F;
}
.tag--orange{background:rgba(255,90,31,.1);color:var(--orange-dark)}
.tag--lime{background:rgba(215,255,63,.28);color:#5A6B00}
.tag--ink{background:rgba(14,17,18,.06);color:#4A514E}
.item-foot{display:flex;flex-wrap:wrap;align-items:center;gap:14px;font-size:13px;color:var(--muted)}
.item-foot .update{font-family:"IBM Plex Mono",ui-monospace,monospace;font-size:12.5px}
.item-foot a{font-weight:700;color:var(--ink);display:inline-flex;align-items:center;gap:6px}
.item-foot a:hover{color:var(--orange)}
.item-foot a i{font-size:12px;transition:transform var(--ease)}
.item-foot a:hover i{transform:translateX(4px)}

/* 口径表 */
.table-wrap{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-m);overflow:hidden;box-shadow:var(--shadow-s);
}
.data-table{width:100%;border-collapse:collapse;font-size:15px}
.data-table caption{
  text-align:left;padding:20px 24px 4px;font-size:13px;font-weight:700;color:var(--muted);letter-spacing:.04em;
}
.data-table th,.data-table td{padding:14px 24px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}
.data-table thead th{
  background:var(--ink);color:#fff;font-size:13px;letter-spacing:.06em;font-weight:700;border-bottom:0;
}
.data-table tbody tr:nth-child(odd){background:#FBFAF7}
.data-table tbody tr:hover{background:rgba(255,90,31,.05)}
.data-table td:first-child{font-weight:700;color:var(--ink);white-space:nowrap}
.data-table td:last-child{color:var(--muted);font-size:14px}
.data-table tbody tr:last-child td{border-bottom:0}

/* 对比要点 */
.compare{display:flex;flex-wrap:wrap;gap:22px}
.compare-card{
  flex:1 1 320px;background:#fff;border:1px solid var(--line);border-radius:var(--radius-m);padding:26px;
  transition:border-color var(--ease),transform var(--ease);
}
.compare-card:hover{border-color:var(--teal);transform:translateY(-2px)}
.compare-card h3{font-size:19px;font-weight:800;margin-bottom:6px}
.compare-card .sub{font-size:13px;font-weight:700;letter-spacing:.06em;color:var(--teal);margin-bottom:14px}
.compare-card ul li{position:relative;padding-left:20px;font-size:15.3px;color:#3C4240;margin-bottom:10px;line-height:1.7}
.compare-card ul li::before{
  content:"";position:absolute;left:0;top:11px;width:8px;height:2px;background:var(--orange);
}
.compare-card ul li:last-child{margin-bottom:0}

/* FAQ */
.faq-accordion{display:flex;flex-direction:column;gap:12px;background:transparent}
.faq-accordion .accordion-item{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-m);overflow:hidden;
  transition:border-color var(--ease);
}
.faq-accordion .accordion-item.is-open{border-color:var(--orange)}
.faq-accordion .accordion-title{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;text-align:left;
  padding:20px 24px;font-size:16.5px;font-weight:700;color:var(--ink);line-height:1.5;
}
.faq-accordion .accordion-title:hover{color:var(--orange)}
.faq-icon{position:relative;flex:0 0 16px;width:16px;height:16px}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;background:var(--orange);border-radius:2px;transition:transform var(--ease),opacity var(--ease)}
.faq-icon::before{left:0;top:7px;width:16px;height:2px}
.faq-icon::after{left:7px;top:0;width:2px;height:16px}
.accordion-item.is-open .faq-icon::after{transform:rotate(90deg);opacity:0}
.faq-accordion .accordion-content{display:none;padding:0 24px 22px;font-size:15.6px;line-height:1.85;color:#3C4240}
.faq-accordion .accordion-content p{margin:0}
.faq-accordion .accordion-item.is-open .accordion-content{display:block}

/* 相关推荐 */
.rec-grid{display:flex;flex-wrap:wrap;gap:24px}
.rec-card{
  flex:1 1 300px;background:#fff;border:1px solid var(--line);border-radius:var(--radius-m);overflow:hidden;
  display:flex;flex-direction:column;transition:border-color var(--ease),transform var(--ease),box-shadow var(--ease);
}
.rec-card:hover{border-color:var(--orange);transform:translateY(-2px);box-shadow:var(--shadow-hover)}
.rec-card__media{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--ink)}
.rec-card__media img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease}
.rec-card:hover .rec-card__media img{transform:scale(1.03)}
.rec-card__body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:10px;flex:1 1 auto}
.rec-card h3{font-size:18px;font-weight:800;line-height:1.4}
.rec-card p{font-size:14.6px;color:var(--muted);line-height:1.7;margin:0}
.rec-card .more{margin-top:auto;font-size:14px;font-weight:700;color:var(--orange);display:inline-flex;align-items:center;gap:6px}
.rec-card:hover h3{color:var(--orange)}

/* CTA */
.cta-band{background:var(--ink);color:#fff;border-radius:var(--radius-l);padding:44px 48px}
.cta-band__inner{display:flex;flex-wrap:wrap;gap:28px;align-items:center;justify-content:space-between}
.cta-band h2{font-size:clamp(22px,2.5vw,30px);font-weight:800;margin-bottom:10px}
.cta-band p{color:rgba(255,255,255,.74);font-size:15.5px;max-width:560px;margin:0}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}
.cta-actions .btn{min-width:132px}
.copy-note{font-size:13px;color:var(--lime);margin-top:12px;min-height:18px}

/* 页脚 */
.site-footer{background:var(--ink);color:#C9CDC9;padding:72px 0 26px;margin-top:0}
.footer-grid{display:flex;flex-wrap:wrap;gap:36px 48px}
.footer-brand{flex:1 1 320px;max-width:420px}
.footer-desc{font-size:14.6px;line-height:1.8;color:#9AA09D;margin:16px 0 20px}
.footer-social{display:flex;gap:10px}
.footer-social a{
  width:36px;height:36px;border:1px solid rgba(255,255,255,.18);border-radius:9px;
  display:inline-flex;align-items:center;justify-content:center;color:#C9CDC9;transition:all var(--ease);
}
.footer-social a:hover{border-color:var(--orange);color:var(--orange)}
.footer-col{flex:0 1 auto;min-width:168px}
.footer-col h4{font-size:14px;font-weight:800;color:#fff;margin-bottom:16px;letter-spacing:.02em}
.footer-col ul li{margin-bottom:10px;font-size:14.4px;color:#9AA09D}
.footer-col ul li a:hover{color:var(--orange)}
.footer-bottom{
  margin-top:48px;padding-top:20px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;font-size:13.4px;color:#8A908D;
}

/* 移动抽屉 */
.mobile-drawer{
  display:none;position:fixed;inset:70px 0 0 0;background:#fff;z-index:55;padding:26px 24px 40px;overflow-y:auto;
}
.mobile-drawer.is-open{display:block}
.mobile-drawer .nav-link{display:block;font-size:19px;padding:15px 4px;border-bottom:1px solid var(--line)}
.mobile-drawer .nav-link::after{display:none}
.mobile-drawer .command-search{width:100%;margin:22px 0}
.mobile-drawer .drawer-actions{display:flex;gap:12px;margin-bottom:22px}
.mobile-drawer .btn{width:100%}

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

/* 响应式 */
@media (max-width:1024px){
  .container{padding:0 28px}
  .nav-links,.command-search,.header-actions .icon-btn,.header-actions .btn{display:none}
  .header-actions .menu-toggle{display:inline-flex}
  .header-inner{gap:12px}
  .site-header .brand{margin-right:auto}
  .layout-split{flex-direction:column;gap:28px}
  .side-nav{position:static;width:100%;flex:1 1 auto}
  .section{padding:76px 0}
}
@media (max-width:640px){
  .container{padding:0 20px}
  body{font-size:16px}
  .section{padding:58px 0}
  .section--tight{padding:52px 0}
  .cat-hero{padding:52px 0 46px}
  .cat-hero__lead{font-size:16px}
  .num-item{grid-template-columns:1fr;gap:12px;padding:20px}
  .num-item__no{font-size:22px}
  .data-table th,.data-table td{padding:11px 16px;font-size:14px}
  .data-table caption{padding:16px 16px 2px}
  .cta-band{padding:32px 24px;border-radius:18px}
  .cta-actions .btn{width:100%}
  .footer-grid{gap:28px}
  .footer-col{min-width:calc(50% - 24px);flex:1 1 calc(50% - 24px)}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none}
}

/* roulang page: category3 */
/* ============ 设计变量 ============ */
:root{
  --primary:#FF5A1F;
  --primary-deep:#D8460D;
  --teal:#0FA3A3;
  --teal-deep:#0B7E7E;
  --lime:#D7FF3F;
  --obsidian:#0E1112;
  --obsidian-soft:#181D1E;
  --paper:#F6F4EF;
  --surface:#FFFFFF;
  --line:#E4E0D8;
  --line-strong:#D2CCC1;
  --ink:#121514;
  --muted:#6A716E;
  --radius-xs:8px;
  --radius-sm:10px;
  --radius:14px;
  --radius-lg:22px;
  --shadow-1:0 1px 2px rgba(16,17,18,.06),0 12px 30px rgba(16,17,18,.08);
  --shadow-2:0 2px 8px rgba(16,17,18,.08),0 22px 48px rgba(16,17,18,.10);
  --container:1240px;
  --gutter:clamp(20px,4vw,48px);
  --font-sans:'Noto Sans SC','Source Han Sans SC','PingFang SC','Hiragino Sans GB','Microsoft YaHei',system-ui,-apple-system,sans-serif;
  --font-mono:'IBM Plex Mono','SFMono-Regular',Consolas,Menlo,monospace;
}

/* ============ 基础重置 ============ */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:17px;
  line-height:1.85;
  color:var(--ink);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4{margin:0;font-weight:800;letter-spacing:-.02em;line-height:1.18;color:var(--ink)}
p{margin:0 0 1.15em}
p:last-child{margin-bottom:0}
ul,ol{margin:0;padding:0;list-style:none}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none;transition:color .2s ease,border-color .2s ease,background-color .2s ease}
a:hover{color:var(--primary)}
button{font:inherit;color:inherit;border:0;background:none;cursor:pointer}
input{font:inherit}
::selection{background:var(--lime);color:var(--obsidian)}
:focus-visible{outline:2px solid var(--teal);outline-offset:2px}
strong{font-weight:700}

/* ============ 覆盖 Foundation 默认 ============ */
body,.button,button,input,select,textarea{font-family:var(--font-sans)}
a:hover,a:focus{color:var(--primary)}
.accordion{background:transparent;border:0;margin:0}
.off-canvas-wrapper{overflow:visible}
.off-canvas-content{min-height:100vh}

/* ============ 容器 ============ */
.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding-left:var(--gutter);
  padding-right:var(--gutter);
}

/* ============ 导航 ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:var(--paper);
  border-bottom:1px solid var(--line);
  transition:box-shadow .25s ease;
}
.site-header.is-scrolled{box-shadow:0 6px 22px rgba(16,17,18,.08)}
.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:clamp(14px,2vw,30px);
  min-height:72px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-size:19px;
  font-weight:800;
  letter-spacing:-.01em;
  color:var(--ink);
  flex:0 0 auto;
}
.brand:hover{color:var(--ink)}
.brand-mark{
  position:relative;
  width:28px;
  height:28px;
  flex:0 0 28px;
  border-radius:9px;
  background:linear-gradient(135deg,var(--primary),#FF8A55);
  overflow:hidden;
}
.brand-mark::before{
  content:"";
  position:absolute;
  left:6px;right:6px;top:9px;
  height:3px;
  border-radius:2px;
  background:#FFFFFF;
  transform:skewX(-16deg);
}
.brand-mark::after{
  content:"";
  position:absolute;
  left:6px;right:11px;top:16px;
  height:3px;
  border-radius:2px;
  background:rgba(255,255,255,.72);
  transform:skewX(-16deg);
}
.brand--light{color:#FFFFFF}
.brand--light:hover{color:#FFFFFF}
.nav-links{display:flex;align-items:center;gap:clamp(4px,1.3vw,20px)}
.nav-link{
  position:relative;
  padding:8px 2px;
  font-size:15px;
  font-weight:600;
  color:var(--muted);
  white-space:nowrap;
}
.nav-link::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:0;
  height:2px;
  border-radius:2px;
  background:var(--primary);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .25s ease;
}
.nav-link:hover{color:var(--ink)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.active{color:var(--ink)}
.nav-link.active::after{transform:scaleX(1)}
.header-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.command-search{
  display:flex;
  align-items:center;
  gap:8px;
  height:40px;
  padding:0 10px 0 12px;
  min-width:246px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-sm);
  color:var(--muted);
  transition:border-color .2s ease,box-shadow .2s ease;
}
.command-search:focus-within{
  border-color:var(--primary);
  box-shadow:0 0 0 3px rgba(255,90,31,.14);
}
.command-search input{
  flex:1 1 auto;
  min-width:0;
  border:0;
  outline:0;
  background:transparent;
  font-size:14px;
  color:var(--ink);
}
.command-search input::placeholder{color:#9AA09C}
.command-search kbd{
  font-family:var(--font-mono);
  font-size:11px;
  line-height:1;
  padding:4px 6px;
  border:1px solid var(--line);
  border-radius:6px;
  color:var(--muted);
  background:var(--paper);
}
.icon-btn{
  width:38px;
  height:38px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  border:1px solid var(--line);
  border-radius:var(--radius-sm);
  background:var(--surface);
  color:var(--muted);
  transition:transform .18s ease,color .18s ease,border-color .18s ease;
}
.icon-btn:hover{color:var(--primary);border-color:var(--primary);transform:translateY(-1px)}
.icon-btn:active{transform:scale(.94)}
.menu-toggle{
  display:none;
  width:40px;
  height:40px;
  align-items:center;
  justify-content:center;
  border:1px solid var(--line);
  border-radius:var(--radius-sm);
  background:var(--surface);
  color:var(--ink);
}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:13px 24px;
  border-radius:var(--radius-sm);
  border:1px solid transparent;
  font-size:15px;
  font-weight:700;
  line-height:1.2;
  letter-spacing:.01em;
  cursor:pointer;
  transition:transform .18s ease,background-color .18s ease,color .18s ease,border-color .18s ease,box-shadow .18s ease;
}
.btn-primary{
  background:var(--primary);
  color:#FFFFFF;
  box-shadow:0 6px 16px rgba(255,90,31,.22);
}
.btn-primary:hover{background:var(--primary-deep);color:#FFFFFF;transform:translateY(-1px);box-shadow:0 10px 22px rgba(255,90,31,.28)}
.btn-primary:active{transform:translateY(0) scale(.99)}
.btn-outline{
  background:transparent;
  border-color:var(--ink);
  color:var(--ink);
}
.btn-outline:hover{background:var(--ink);color:#FFFFFF;transform:translateY(-1px)}
.btn-ghost{
  background:transparent;
  border-color:transparent;
  color:#FFFFFF;
  padding-left:6px;
  padding-right:6px;
  border-bottom:2px solid rgba(255,255,255,.4);
  border-radius:0;
}
.btn-ghost:hover{color:var(--lime);border-bottom-color:var(--lime)}
.btn-dark-outline{
  background:transparent;
  border-color:rgba(255,255,255,.36);
  color:#FFFFFF;
}
.btn-dark-outline:hover{background:#FFFFFF;color:var(--obsidian);transform:translateY(-1px)}
.btn-sm{padding:10px 18px;font-size:14px}
.btn:disabled,.btn[disabled]{opacity:.4;cursor:not-allowed}

/* ============ 标签 ============ */
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:5px 11px;
  border-radius:999px;
  font-size:12px;
  font-weight:700;
  letter-spacing:.06em;
  border:1px solid transparent;
  white-space:nowrap;
}
.tag--lime{background:var(--lime);color:#22300A}
.tag--teal{background:rgba(15,163,163,.12);color:var(--teal-deep);border-color:rgba(15,163,163,.3)}
.tag--orange{background:rgba(255,90,31,.1);color:var(--primary-deep);border-color:rgba(255,90,31,.28)}
.tag--ghost{background:transparent;color:var(--muted);border-color:var(--line)}
.tag--onDark{background:rgba(255,255,255,.12);color:#FFFFFF;border-color:rgba(255,255,255,.18)}

/* ============ 板块 ============ */
.section{padding:clamp(56px,8vw,112px) 0}
.section--surface{background:var(--surface)}
.section--tight{padding-top:clamp(40px,5vw,64px)}
.section-head{max-width:780px;margin-bottom:clamp(30px,4vw,54px)}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--primary);
  margin-bottom:14px;
}
.eyebrow::before{content:"";width:24px;height:2px;background:var(--primary);display:inline-block}
.section-head h2{font-size:clamp(26px,3.6vw,42px)}
.section-desc{margin-top:14px;color:var(--muted);font-size:16.5px;max-width:700px}

/* ============ 分类页 Hero ============ */
.cat-hero{
  position:relative;
  isolation:isolate;
  overflow:hidden;
  background:var(--obsidian);
  color:#FFFFFF;
}
.cat-hero__bg{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  object-fit:cover;
  z-index:-2;
  opacity:.6;
}
.cat-hero__mask{
  position:absolute;
  inset:0;
  z-index:-1;
  background:linear-gradient(108deg,rgba(14,17,18,.95) 6%,rgba(14,17,18,.78) 46%,rgba(14,17,18,.42) 100%);
}
.cat-hero__inner{
  max-width:880px;
  padding:clamp(52px,7vw,92px) 0 clamp(46px,6vw,76px);
}
.crumbs{
  display:flex;
  align-items:center;
  gap:9px;
  font-size:13px;
  color:rgba(255,255,255,.6);
  margin-bottom:20px;
}
.crumbs a{color:rgba(255,255,255,.6)}
.crumbs a:hover{color:#FFFFFF}
.crumbs span{color:rgba(255,255,255,.32)}
.cat-hero h1{
  margin-top:18px;
  font-size:clamp(32px,5.4vw,64px);
  font-weight:900;
  line-height:1.04;
  letter-spacing:-.03em;
  color:#FFFFFF;
}
.cat-hero__sub{
  margin:20px 0 0;
  max-width:620px;
  font-size:clamp(16px,1.6vw,18.5px);
  line-height:1.8;
  color:rgba(255,255,255,.78);
}
.cat-hero__stats{
  display:flex;
  flex-wrap:wrap;
  gap:clamp(20px,3.6vw,52px);
  margin:30px 0 30px;
  padding-top:24px;
  border-top:1px solid rgba(255,255,255,.16);
}
.stat strong{
  display:block;
  font-family:var(--font-mono);
  font-size:clamp(22px,2.6vw,30px);
  font-weight:700;
  line-height:1.1;
  color:var(--lime);
}
.stat span{
  display:block;
  margin-top:6px;
  font-size:13px;
  letter-spacing:.06em;
  color:rgba(255,255,255,.62);
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px}

/* ============ 图集流 ============ */
.gallery-track{
  display:flex;
  gap:22px;
  overflow-x:auto;
  padding:6px 2px 22px;
  scroll-snap-type:x mandatory;
  scrollbar-width:thin;
  -webkit-mask-image:linear-gradient(90deg,transparent 0,#000 26px,#000 calc(100% - 26px),transparent 100%);
  mask-image:linear-gradient(90deg,transparent 0,#000 26px,#000 calc(100% - 26px),transparent 100%);
}
.gallery-track::-webkit-scrollbar{height:6px}
.gallery-track::-webkit-scrollbar-track{background:transparent}
.gallery-track::-webkit-scrollbar-thumb{background:var(--line-strong);border-radius:999px}
.gallery-card{
  flex:0 0 min(322px,76vw);
  scroll-snap-align:start;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius);
  overflow:hidden;
  box-shadow:var(--shadow-1);
  transition:transform .22s ease,border-color .22s ease,box-shadow .22s ease;
}
.gallery-card:hover{transform:translateY(-4px);border-color:var(--primary);box-shadow:var(--shadow-2)}
.gallery-card__media{position:relative;aspect-ratio:16/10;overflow:hidden;background:var(--paper)}
.gallery-card__media img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease}
.gallery-card:hover .gallery-card__media img{transform:scale(1.04)}
.gallery-card__num{
  position:absolute;
  left:14px;
  top:14px;
  padding:4px 10px;
  border-radius:999px;
  background:rgba(14,17,18,.8);
  color:#FFFFFF;
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:700;
  letter-spacing:.1em;
}
.gallery-card__body{padding:18px 20px 22px}
.gallery-card__body h3{font-size:18px;margin-bottom:8px}
.gallery-card__body p{color:var(--muted);font-size:14.5px;line-height:1.75;margin:0}
.gallery-card__foot{
  display:flex;
  align-items:center;
  justify-content:space-between;
  margin-top:16px;
  padding-top:14px;
  border-top:1px solid var(--line);
  font-size:13px;
  color:var(--muted);
}
.gallery-card__foot .arrow{color:var(--primary);font-weight:700;transition:transform .2s ease}
.gallery-card:hover .gallery-card__foot .arrow{transform:translateX(4px)}

/* ============ 时间线 ============ */
.timeline{
  position:relative;
  margin-left:10px;
  padding-left:0;
  border-left:2px solid var(--line);
}
.timeline-item{position:relative;padding:0 0 36px 34px}
.timeline-item:last-child{padding-bottom:0}
.timeline-item::before{
  content:"";
  position:absolute;
  left:-10px;
  top:7px;
  width:18px;
  height:18px;
  border-radius:50%;
  background:var(--surface);
  border:3px solid var(--primary);
}
.timeline-item__num{
  font-family:var(--font-mono);
  font-size:13px;
  font-weight:700;
  letter-spacing:.12em;
  color:var(--primary);
}
.timeline-item h3{font-size:20px;margin:6px 0 10px}
.timeline-item p{color:var(--muted);font-size:15.5px;margin:0;max-width:620px}
.timeline-meta{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}

/* ============ 口径面板 ============ */
.spec-panel{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:clamp(22px,2.6vw,30px);
  box-shadow:var(--shadow-1);
  position:sticky;
  top:96px;
}
.spec-panel h3{font-size:19px;margin-bottom:6px}
.spec-panel__hint{color:var(--muted);font-size:14px;margin-bottom:18px}
.spec-list li{
  padding:16px 0;
  border-top:1px solid var(--line);
}
.spec-list li:first-child{border-top:0;padding-top:0}
.spec-key{
  display:inline-block;
  min-width:64px;
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:700;
  letter-spacing:.1em;
  color:var(--teal-deep);
  background:rgba(15,163,163,.1);
  border-radius:6px;
  padding:3px 8px;
  margin-bottom:8px;
}
.spec-val{display:block;font-size:15px;line-height:1.8;color:var(--ink)}

/* ============ 精选条目编号清单 ============ */
.pick-list{border-top:1px solid var(--line)}
.pick-item{
  display:grid;
  grid-template-columns:92px 1fr auto;
  gap:26px;
  align-items:start;
  padding:26px 6px;
  border-bottom:1px solid var(--line);
  transition:background-color .22s ease,border-color .22s ease;
}
.pick-item:hover{background:var(--surface);border-bottom-color:var(--primary)}
.pick-item__num{
  font-family:var(--font-mono);
  font-size:30px;
  font-weight:700;
  line-height:1;
  color:var(--line-strong);
  transition:color .22s ease;
}
.pick-item:hover .pick-item__num{color:var(--primary)}
.pick-item__body h3{font-size:20px;margin-bottom:10px;transition:color .2s ease}
.pick-item:hover .pick-item__body h3{color:var(--primary)}
.pick-item__body p{color:var(--muted);font-size:15.5px;margin:0;max-width:700px}
.pick-item__link{
  align-self:center;
  font-size:14px;
  font-weight:700;
  color:var(--primary);
  white-space:nowrap;
  transition:transform .2s ease;
}
.pick-item:hover .pick-item__link{transform:translateX(3px)}

/* ============ FAQ ============ */
.faq-wrap{max-width:900px}
.accordion-item{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius);
  margin-bottom:12px;
  overflow:hidden;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.accordion-item:hover{border-color:var(--line-strong)}
.accordion-item.is-active{border-color:var(--primary);box-shadow:var(--shadow-1)}
.accordion-title{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  padding:20px 24px;
  margin:0;
  background:transparent;
  border:0;
  font-size:17px;
  font-weight:700;
  line-height:1.5;
  color:var(--ink);
}
.accordion-title:hover,.accordion-title:focus{background:transparent;color:var(--primary)}
.accordion-title::before{display:none}
.accordion-title::after{
  content:"";
  width:14px;
  height:14px;
  flex:0 0 14px;
  background-image:linear-gradient(var(--primary),var(--primary)),linear-gradient(var(--primary),var(--primary));
  background-size:14px 2px,2px 14px;
  background-position:center center;
  background-repeat:no-repeat;
  transition:transform .25s ease;
}
.accordion-item.is-active .accordion-title::after{transform:rotate(45deg)}
.accordion-content{
  padding:0 24px 22px;
  border:0;
  background:var(--surface);
  color:var(--muted);
  font-size:16px;
  line-height:1.85;
}
.accordion-content p{margin:0}
.accordion-content a{color:var(--primary);border-bottom:1px solid rgba(255,90,31,.35)}

/* ============ CTA 深色条 ============ */
.cta-band{
  position:relative;
  overflow:hidden;
  display:grid;
  grid-template-columns:1.2fr auto;
  gap:clamp(24px,4vw,48px);
  align-items:center;
  padding:clamp(30px,4.6vw,56px);
  border-radius:var(--radius-lg);
  background:var(--obsidian);
  color:#FFFFFF;
  box-shadow:var(--shadow-2);
}
.cta-band::after{
  content:"";
  position:absolute;
  right:-60px;
  top:-60px;
  width:240px;
  height:240px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(255,90,31,.35),transparent 68%);
  pointer-events:none;
}
.cta-band h2{font-size:clamp(23px,3vw,34px);color:#FFFFFF;position:relative}
.cta-band p{margin-top:12px;color:rgba(255,255,255,.7);font-size:15.5px;max-width:560px;position:relative}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;position:relative}

/* ============ 相关推荐 ============ */
.rel-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.rel-card{
  display:flex;
  flex-direction:column;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius);
  overflow:hidden;
  box-shadow:var(--shadow-1);
  transition:transform .22s ease,border-color .22s ease,box-shadow .22s ease;
}
.rel-card:hover{transform:translateY(-4px);border-color:var(--primary);box-shadow:var(--shadow-2)}
.rel-card__media{aspect-ratio:16/9;overflow:hidden;background:var(--paper)}
.rel-card__media img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease}
.rel-card:hover .rel-card__media img{transform:scale(1.04)}
.rel-card__body{padding:20px 22px 24px;display:flex;flex-direction:column;gap:10px;flex:1 1 auto}
.rel-card__body h3{font-size:18px;line-height:1.4}
.rel-card:hover .rel-card__body h3{color:var(--primary)}
.rel-card__body p{color:var(--muted);font-size:14.5px;margin:0;flex:1 1 auto}
.rel-card__meta{font-size:13px;color:var(--muted);display:flex;align-items:center;gap:10px}

/* ============ 页脚 ============ */
.site-footer{
  background:var(--obsidian);
  color:rgba(255,255,255,.72);
  padding:clamp(48px,6vw,80px) 0 28px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.7fr 1fr 1fr 1fr;
  gap:clamp(24px,3vw,48px);
}
.footer-brand .brand{margin-bottom:18px}
.footer-desc{
  font-size:14.5px;
  line-height:1.85;
  color:rgba(255,255,255,.6);
  max-width:360px;
  margin:0;
}
.footer-social{display:flex;gap:10px;margin-top:20px}
.footer-social a{
  width:36px;
  height:36px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  border:1px solid rgba(255,255,255,.18);
  border-radius:var(--radius-sm);
  color:rgba(255,255,255,.7);
  transition:transform .2s ease,color .2s ease,border-color .2s ease;
}
.footer-social a:hover{color:var(--primary);border-color:var(--primary);transform:translateY(-2px)}
.footer-col h4{
  color:#FFFFFF;
  font-size:15px;
  font-weight:700;
  letter-spacing:.02em;
  margin-bottom:16px;
}
.footer-col ul li{margin-bottom:10px}
.footer-col a,.footer-col span{font-size:14.5px;color:rgba(255,255,255,.66)}
.footer-col a:hover{color:var(--primary)}
.footer-bottom{
  margin-top:44px;
  padding-top:20px;
  border-top:1px solid rgba(255,255,255,.12);
  display:flex;
  flex-wrap:wrap;
  gap:10px 24px;
  justify-content:space-between;
  font-size:13px;
  color:rgba(255,255,255,.5);
}
.footer-bottom p{margin:0}

/* ============ 移动抽屉 ============ */
.off-canvas{background:var(--surface);color:var(--ink);width:min(340px,86vw)}
.mobile-menu{display:flex;flex-direction:column;height:100%;padding:22px 22px 28px}
.mobile-menu__head{display:flex;align-items:center;justify-content:space-between;margin-bottom:22px}
.mobile-menu__close{
  width:36px;height:36px;display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--line);border-radius:var(--radius-sm);color:var(--muted);
}
.mobile-search{display:flex;align-items:center;gap:8px;height:42px;padding:0 12px;border:1px solid var(--line);border-radius:var(--radius-sm);margin-bottom:18px;color:var(--muted)}
.mobile-search input{flex:1 1 auto;min-width:0;border:0;outline:0;background:transparent;font-size:14.5px}
.mobile-menu__list a{
  display:block;
  padding:15px 2px;
  font-size:17px;
  font-weight:700;
  border-bottom:1px solid var(--line);
  color:var(--ink);
}
.mobile-menu__list a.active{color:var(--primary)}
.mobile-menu__foot{margin-top:24px;display:flex;flex-direction:column;gap:12px}
.mobile-menu__icons{display:flex;gap:10px}

/* ============ 响应式 ============ */
@media (max-width:1024px){
  .nav-links,.command-search{display:none}
  .menu-toggle{display:inline-flex}
  .icon-btn{display:none}
  .section{padding:clamp(52px,7vw,84px) 0}
  .rel-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:1fr 1fr}
  .spec-panel{position:static;margin-top:36px}
  .pick-item{grid-template-columns:64px 1fr}
  .pick-item__link{grid-column:2;justify-self:start}
}
@media (max-width:640px){
  body{font-size:16px}
  .header-inner{min-height:64px}
  .brand{font-size:17px}
  .hero-actions .btn,.cta-actions .btn{width:100%}
  .cat-hero__stats{gap:22px}
  .stat strong{font-size:22px}
  .gallery-card{flex:0 0 82vw}
  .pick-item{grid-template-columns:48px 1fr;gap:16px;padding:22px 2px}
  .pick-item__num{font-size:24px}
  .rel-grid,.footer-grid{grid-template-columns:1fr}
  .cta-band{grid-template-columns:1fr}
  .accordion-title{padding:17px 18px;font-size:16px}
  .accordion-content{padding:0 18px 20px}
  .footer-bottom{flex-direction:column}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;transition-duration:.001ms !important;scroll-behavior:auto !important}
}