/* roulang page: index */
:root{
  --bg-0:#080D0B;
  --bg-1:#0F1714;
  --bg-2:#16211D;
  --bg-3:#1E2C27;
  --line:#24332D;
  --text-1:#EEF4F1;
  --text-2:#A7B5AF;
  --text-3:#6E7C76;
  --brand:#16C784;
  --brand-deep:#0E8A5C;
  --brand-soft:rgba(22,199,132,.12);
  --accent:#FF7A2B;
  --copper:#C8A26A;
  --ok:#35D07F;
  --warn:#F5C451;
  --err:#FF5A5A;
  --r-xs:6px;
  --r-sm:10px;
  --r-md:14px;
  --r-lg:22px;
  --r-full:999px;
  --sh-1:0 2px 0 rgba(0,0,0,.4);
  --sh-2:0 18px 40px -18px rgba(0,0,0,.75);
  --nav-w:240px;
  --font-num:"DIN Alternate","Roboto Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
  --ease:cubic-bezier(.2,.7,.3,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;padding:0;
  background:var(--bg-0);
  color:var(--text-1);
  font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  font-size:16.5px;line-height:1.8;font-weight:400;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
button,input{font:inherit;color:inherit}
button{cursor:pointer;border:0;background:none}
h1,h2,h3,h4,p,figure,ul,ol{margin:0}
ul,ol{padding:0;list-style:none}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px}
::selection{background:var(--brand-soft);color:var(--text-1)}

/* ===== 布局骨架 ===== */
.layout{display:flex;min-height:100vh}
.sidenav{
  position:fixed;top:0;left:0;bottom:0;width:var(--nav-w);
  background:var(--bg-1);border-right:1px solid var(--line);
  display:flex;flex-direction:column;gap:8px;padding:24px 16px;z-index:60;
  transition:width 200ms var(--ease);
}
.page{margin-left:var(--nav-w);flex:1;min-width:0;display:flex;flex-direction:column}
.wrap{width:100%;max-width:1440px;margin:0 auto;padding:0 40px}

/* ===== 品牌区 ===== */
.brand{display:flex;align-items:center;gap:12px;padding:6px 8px 20px;border-bottom:1px solid var(--line);margin-bottom:16px}
.brand-mark{
  width:40px;height:40px;flex:0 0 40px;border-radius:var(--r-sm);
  border:1px solid var(--brand);color:var(--brand);
  display:flex;align-items:center;justify-content:center;
  font-family:var(--font-num);font-size:15px;font-weight:700;letter-spacing:.02em;
  background:var(--brand-soft);
}
.brand-text{display:flex;flex-direction:column;line-height:1.35;min-width:0}
.brand-text strong{font-size:16px;font-weight:800;letter-spacing:.01em;color:var(--text-1);white-space:nowrap}
.brand-text em{font-style:normal;font-size:12px;letter-spacing:.06em;color:var(--text-3);white-space:nowrap}

/* ===== 导航 ===== */
.nav-main{display:flex;flex-direction:column;gap:4px;flex:1}
.nav-item{
  position:relative;display:flex;align-items:center;gap:12px;
  height:48px;padding:0 12px;border-radius:var(--r-sm);
  color:var(--text-2);font-size:15px;font-weight:500;
  transition:background 180ms var(--ease),color 180ms var(--ease),transform 180ms var(--ease);
}
.nav-item i{width:20px;font-size:16px;text-align:center;color:inherit;opacity:.9}
.nav-item:hover{background:var(--bg-3);color:var(--text-1)}
.nav-item.is-active{background:var(--brand-soft);color:var(--text-1)}
.nav-item.is-active::before{content:"";position:absolute;left:0;top:10px;bottom:10px;width:3px;border-radius:2px;background:var(--brand)}
.nav-sub{display:flex;flex-direction:column;gap:2px;border-top:1px solid var(--line);padding-top:12px}
.nav-sub a{font-size:14px;color:var(--text-3);padding:6px 12px;border-radius:var(--r-xs);transition:color 180ms var(--ease),background 180ms var(--ease)}
.nav-sub a:hover{color:var(--text-1);background:var(--bg-3)}

/* ===== 移动顶栏 ===== */
.topbar{
  display:none;position:sticky;top:0;z-index:70;height:60px;
  align-items:center;justify-content:space-between;
  padding:0 18px;background:var(--bg-1);border-bottom:1px solid var(--line);
}
.topbar .brand{padding:0;border:0;margin:0}
.topbar .brand-mark{width:34px;height:34px;flex:0 0 34px;font-size:13px}
.topbar .brand-text strong{font-size:14px}
.topbar .brand-text em{font-size:11px}
.burger{
  width:44px;height:44px;display:flex;align-items:center;justify-content:center;
  border:1px solid var(--line);border-radius:var(--r-sm);color:var(--text-1);background:var(--bg-2);
}
.burger:hover{border-color:var(--brand);color:var(--brand)}
.scrim{
  position:fixed;inset:0;background:rgba(0,0,0,.6);z-index:55;
  opacity:0;visibility:hidden;transition:opacity 220ms var(--ease),visibility 220ms var(--ease);
}
.scrim.is-open{opacity:1;visibility:visible}

/* ===== 通用组件 ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 22px;border-radius:var(--r-sm);
  font-size:15px;font-weight:600;letter-spacing:.01em;
  transition:background 180ms var(--ease),color 180ms var(--ease),border-color 180ms var(--ease),transform 120ms var(--ease);
}
.btn:active{transform:scale(.98)}
.btn-primary{background:var(--brand);color:var(--bg-0)}
.btn-primary:hover{background:var(--brand-deep);color:#fff}
.btn-ghost{background:var(--bg-2);border:1px solid var(--line);color:var(--text-1)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand)}
.btn[disabled],.btn.is-disabled{opacity:.4;pointer-events:none}
.link-more{color:var(--brand);font-size:14px;font-weight:500;transition:transform 180ms var(--ease)}
.link-more:hover{text-decoration:underline;text-underline-offset:3px;transform:translateX(1px)}
.badge{
  display:inline-flex;align-items:center;height:23px;padding:0 10px;
  border-radius:var(--r-full);font-size:12px;letter-spacing:.06em;
  background:var(--brand-soft);color:var(--brand);white-space:nowrap;
}
.badge-copper{background:transparent;border:1px solid var(--copper);color:var(--copper)}
.badge-num{
  position:absolute;right:10px;bottom:10px;
  background:rgba(8,13,11,.7);color:var(--text-1);
  font-family:var(--font-num);font-size:12px;letter-spacing:.04em;
  height:22px;padding:0 8px;border-radius:var(--r-xs);
  display:inline-flex;align-items:center;
}
.num{font-family:var(--font-num);letter-spacing:.03em}
.sec{padding:72px 0}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:32px;flex-wrap:wrap}
.sec-title{padding-left:14px;position:relative}
.sec-title::before{content:"";position:absolute;left:0;top:.3em;bottom:.24em;width:3px;border-radius:2px;background:var(--brand)}
.sec-title h2{font-size:26px;line-height:1.35;font-weight:700}
.sec-title p{margin-top:6px;font-size:14px;color:var(--text-2);max-width:640px}
.sec-actions{display:flex;align-items:center;gap:16px}
.round-btn{
  width:36px;height:36px;border-radius:50%;border:1px solid var(--line);
  display:inline-flex;align-items:center;justify-content:center;color:var(--text-2);
  transition:border-color 180ms var(--ease),color 180ms var(--ease),background 180ms var(--ease);
}
.round-btn:hover{border-color:var(--brand);color:var(--brand);background:var(--brand-soft)}

/* ===== Hero ===== */
.hero{
  position:relative;min-height:560px;height:78vh;display:flex;align-items:flex-end;
  overflow:hidden;border-bottom:1px solid var(--line);
}
.hero-bg{position:absolute;inset:0;background-image:url('/assets/images/backpic/back-1.webp');background-size:cover;background-position:center;background-color:var(--bg-1)}
.hero-bg::after{
  content:"";position:absolute;inset:0;
  background:
    linear-gradient(90deg,var(--bg-0) 6%,rgba(8,13,11,.86) 42%,rgba(8,13,11,.28) 78%,rgba(8,13,11,.55) 100%),
    linear-gradient(180deg,rgba(8,13,11,.72) 0%,rgba(8,13,11,.28) 38%,var(--bg-0) 100%);
}
.hero-inner{position:relative;z-index:2;width:100%;padding:0 40px 56px;max-width:1440px;margin:0 auto}
.hero-eyebrow{
  display:inline-flex;align-items:center;height:28px;padding:0 14px;
  border:1px solid var(--copper);border-radius:var(--r-full);
  color:var(--copper);font-size:13px;letter-spacing:.08em;
  margin-bottom:22px;font-family:var(--font-num);
}
.hero h1{
  font-size:44px;line-height:1.15;font-weight:800;letter-spacing:-.01em;
  max-width:900px;margin-bottom:16px;
}
.hero h1 span{color:var(--brand)}
.hero-sub{font-size:17px;color:var(--text-2);max-width:640px;margin-bottom:30px}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:44px}
.hero-stats{
  display:grid;grid-template-columns:repeat(4,1fr);gap:1px;
  background:var(--line);border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden;
  max-width:760px;
}
.hero-stat{background:rgba(15,23,20,.86);padding:16px 20px}
.hero-stat b{display:block;font-family:var(--font-num);font-size:24px;color:var(--text-1);font-weight:700;line-height:1.3}
.hero-stat span{display:block;font-size:12px;color:var(--text-3);letter-spacing:.06em}

/* ===== 卡片 ===== */
.card{
  background:var(--bg-2);border:1px solid var(--line);border-radius:var(--r-md);
  overflow:hidden;position:relative;
  transition:border-color 180ms var(--ease),transform 180ms var(--ease),box-shadow 180ms var(--ease);
}
.card:hover{border-color:rgba(22,199,132,.45);transform:translateY(-3px);box-shadow:var(--sh-2)}
.card-media{position:relative;overflow:hidden;background:var(--bg-3)}
.card-media.r169{aspect-ratio:16/9}
.card-media.r34{aspect-ratio:3/4}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform 320ms var(--ease)}
.card:hover .card-media img{transform:scale(1.03)}
.card-media::after{content:"";position:absolute;inset:auto 0 0 0;height:58%;background:linear-gradient(180deg,transparent,rgba(8,13,11,.85))}
.card-body{padding:20px;position:relative}
.card-body h3{font-size:17px;line-height:1.5;font-weight:600;margin-bottom:8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card-body p{font-size:14px;color:var(--text-2);line-height:1.7;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card-meta{display:flex;align-items:center;gap:10px;margin-top:14px;font-size:12.5px;color:var(--text-3);font-family:var(--font-num)}
.card-meta .dot{width:3px;height:3px;border-radius:50%;background:var(--text-3)}
.card-cover-title{
  position:absolute;left:16px;right:16px;bottom:14px;z-index:3;
  font-size:16px;font-weight:600;line-height:1.45;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  text-shadow:0 2px 12px rgba(0,0,0,.75);
}

/* 横滑 */
.rail{
  display:flex;gap:20px;overflow-x:auto;scroll-snap-type:x mandatory;
  padding-bottom:10px;scrollbar-width:none;-ms-overflow-style:none;
}
.rail::-webkit-scrollbar{display:none}
.rail .card{flex:0 0 280px;scroll-snap-align:start}

/* 非对称栅格 */
.grid-feature{display:grid;grid-template-columns:repeat(12,1fr);gap:24px}
.f-a{grid-column:span 6}
.f-b{grid-column:span 3}
.f-c{grid-column:span 4}
.grid-feature .f-a .card-media{aspect-ratio:16/9}
.grid-feature .f-a .card-body h3{font-size:22px;-webkit-line-clamp:2}
.grid-feature .f-a .card-body p{font-size:14.5px}

/* ===== 编号榜单 ===== */
.rank-list{border-top:1px solid var(--line)}
.rank-item{
  display:flex;align-items:center;gap:20px;padding:18px 8px;
  border-bottom:1px solid var(--line);transition:background 180ms var(--ease);
}
.rank-item:hover{background:var(--bg-2)}
.rank-no{font-family:var(--font-num);font-size:26px;color:var(--text-3);width:48px;flex:0 0 48px;line-height:1}
.rank-item:hover .rank-no{color:var(--brand)}
.rank-main{flex:1;min-width:0}
.rank-main h3{font-size:16.5px;font-weight:600;line-height:1.5;margin-bottom:4px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.rank-main p{font-size:13.5px;color:var(--text-3);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.rank-tag{font-family:var(--font-num);font-size:12.5px;color:var(--text-2);white-space:nowrap}
.rank-arrow{color:var(--text-3);font-size:14px}
.rank-item:hover .rank-arrow{color:var(--brand)}

/* ===== 双栏图文 ===== */
.split{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.1fr);gap:40px;align-items:center}
.split-media{border-radius:var(--r-md);overflow:hidden;border:1px solid var(--line);aspect-ratio:16/9;background:var(--bg-3)}
.split-media img{width:100%;height:100%;object-fit:cover}
.split-text h3{font-size:22px;font-weight:700;line-height:1.4;margin-bottom:14px}
.split-text p{color:var(--text-2);font-size:15.5px;line-height:1.85;margin-bottom:14px}
.plain-list li{position:relative;padding-left:18px;margin-bottom:8px;color:var(--text-2);font-size:15px}
.plain-list li::before{content:"";position:absolute;left:0;top:.72em;width:6px;height:1px;background:var(--brand)}

/* ===== 时间轴 ===== */
.timeline{position:relative;padding-left:34px}
.timeline::before{content:"";position:absolute;left:9px;top:6px;bottom:6px;width:1px;background:var(--line)}
.tl-item{position:relative;padding:0 0 30px}
.tl-item:last-child{padding-bottom:0}
.tl-item::before{
  content:"";position:absolute;left:-30px;top:8px;width:9px;height:9px;border-radius:50%;
  background:var(--bg-0);border:1.5px solid var(--brand);
}
.tl-time{font-family:var(--font-num);font-size:13px;color:var(--copper);letter-spacing:.06em;margin-bottom:6px;display:block}
.tl-item h3{font-size:16.5px;font-weight:600;margin-bottom:5px}
.tl-item p{font-size:14px;color:var(--text-2);max-width:660px}

/* ===== 纯文字索引 ===== */
.index-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 48px}
.index-item{
  display:flex;align-items:baseline;gap:14px;padding:16px 6px;
  border-bottom:1px solid var(--line);transition:background 180ms var(--ease),padding-left 180ms var(--ease);
}
.index-item:hover{background:var(--bg-2);padding-left:12px}
.index-item i{font-size:11px;color:var(--brand)}
.index-item b{font-weight:500;font-size:15.5px;flex:1;min-width:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.index-item span{font-family:var(--font-num);font-size:12.5px;color:var(--text-3);white-space:nowrap}

/* ===== 最新信息 ===== */
.news-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.news-card{display:flex;flex-direction:column;padding:22px;background:var(--bg-2)}
.news-card .badge{align-self:flex-start;margin-bottom:14px}
.news-card h3{font-size:17px;line-height:1.5;font-weight:600;margin-bottom:10px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-card h3 a:hover{color:var(--brand)}
.news-card p{font-size:14px;color:var(--text-2);line-height:1.75;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;flex:1}
.news-foot{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  margin-top:18px;padding-top:14px;border-top:1px solid var(--line);
}
.news-foot time{font-family:var(--font-num);font-size:12.5px;color:var(--text-3)}
.empty-state{
  grid-column:1/-1;display:flex;flex-direction:column;align-items:center;gap:12px;
  padding:56px 20px;border:1px dashed var(--line);border-radius:var(--r-md);background:var(--bg-1);
}
.empty-state i{font-size:40px;color:var(--text-3);line-height:1}
.empty-state p{font-size:14px;color:var(--text-3)}

/* ===== CTA ===== */
.cta-panel{
  position:relative;background:var(--bg-1);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:44px;display:grid;grid-template-columns:minmax(0,1fr) minmax(0,420px);gap:40px;align-items:center;overflow:hidden;
}
.cta-panel::before{content:"";position:absolute;left:0;right:0;top:0;height:1px;background:linear-gradient(90deg,var(--brand),rgba(22,199,132,.05) 70%,transparent)}
.cta-panel h2{font-size:26px;font-weight:700;line-height:1.35;margin-bottom:10px}
.cta-panel p{color:var(--text-2);font-size:15px;max-width:520px}
.form-row{display:flex;gap:12px;flex-wrap:wrap}
.form-row input{
  flex:1;min-width:200px;height:48px;padding:0 16px;border-radius:var(--r-sm);
  background:var(--bg-3);border:1px solid var(--line);color:var(--text-1);
  transition:border-color 180ms var(--ease),box-shadow 180ms var(--ease);
}
.form-row input::placeholder{color:var(--text-3)}
.form-row input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-soft)}
.form-row input.is-err{border-color:var(--err)}
.form-msg{font-size:12px;margin-top:10px;color:var(--text-3);min-height:18px}
.form-msg.err{color:var(--err)}
.form-msg.ok{color:var(--ok)}

/* ===== FAQ ===== */
.faq{border-top:1px solid var(--line)}
.faq details{border-bottom:1px solid var(--line)}
.faq summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:20px;
  min-height:56px;padding:14px 8px;font-size:16.5px;font-weight:500;color:var(--text-1);
  transition:color 180ms var(--ease);
}
.faq summary::-webkit-details-marker{display:none}
.faq summary:hover{color:var(--brand)}
.faq-sign{position:relative;width:14px;height:14px;flex:0 0 14px}
.faq-sign::before,.faq-sign::after{content:"";position:absolute;background:var(--text-2);transition:transform 180ms var(--ease),background 180ms var(--ease)}
.faq-sign::before{left:0;top:6px;width:14px;height:2px}
.faq-sign::after{left:6px;top:0;width:2px;height:14px}
.faq summary:hover .faq-sign::before,.faq summary:hover .faq-sign::after{background:var(--brand)}
.faq details[open] .faq-sign::after{transform:scaleY(0)}
.faq-body{padding:0 8px 22px;max-width:820px;color:var(--text-2);font-size:15.5px;line-height:1.85}

/* ===== 页脚 ===== */
.site-foot{border-top:1px solid var(--line);background:var(--bg-1);margin-top:0}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;padding:56px 0 40px}
.foot-brand{display:flex;align-items:center;gap:12px;margin-bottom:16px}
.foot-brand .brand-mark{width:36px;height:36px;flex:0 0 36px;font-size:13px}
.foot-brand strong{font-size:15.5px;font-weight:700}
.foot-col h4{font-size:13px;letter-spacing:.08em;color:var(--text-3);font-weight:500;margin-bottom:16px}
.foot-col li{margin-bottom:10px}
.foot-col a{font-size:15px;color:var(--text-2);transition:color 180ms var(--ease)}
.foot-col a:hover{color:var(--brand)}
.foot-desc{font-size:14.5px;color:var(--text-2);line-height:1.8;max-width:420px}
.foot-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;
  min-height:64px;border-top:1px solid var(--line);font-size:13px;color:var(--text-3);
}
.to-top{display:inline-flex;align-items:center;gap:8px;color:var(--text-2);transition:color 180ms var(--ease)}
.to-top:hover{color:var(--brand)}

/* ===== 断点 ===== */
@media (max-width:1439px){
  :root{--nav-w:216px}
  .wrap{padding:0 32px}
  .hero-inner{padding:0 32px 52px}
}
@media (max-width:1199px){
  :root{--nav-w:88px}
  .sidenav{padding:20px 12px;overflow:hidden}
  .sidenav .brand-text,.sidenav .nav-item span,.sidenav .nav-sub{display:none}
  .sidenav .brand{justify-content:center;padding:6px 0 18px}
  .nav-item{justify-content:center;padding:0}
  .nav-item i{width:auto;font-size:18px}
  .sidenav:hover{width:240px;box-shadow:var(--sh-2)}
  .sidenav:hover .brand-text,.sidenav:hover .nav-sub{display:flex}
  .sidenav:hover .nav-item span{display:inline}
  .sidenav:hover .brand{justify-content:flex-start;padding:6px 8px 20px}
  .sidenav:hover .nav-item{justify-content:flex-start;padding:0 12px}
  .grid-feature{grid-template-columns:repeat(6,1fr)}
  .f-a{grid-column:span 6}
  .f-b{grid-column:span 3}
  .f-c{grid-column:span 3}
  .news-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .cta-panel{grid-template-columns:1fr;gap:28px}
  .foot-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:991px){
  .sidenav{
    width:280px;max-width:84vw;transform:translateX(-100%);
    transition:transform 260ms var(--ease);padding:24px 16px;overflow-y:auto;
  }
  .sidenav.is-open{transform:translateX(0);box-shadow:var(--sh-2)}
  .sidenav .brand-text,.sidenav .nav-sub{display:flex}
  .sidenav .brand{justify-content:flex-start;padding:6px 8px 20px}
  .sidenav .nav-item{justify-content:flex-start;padding:0 12px}
  .sidenav .nav-item span{display:inline}
  .sidenav:hover{width:280px}
  .topbar{display:flex}
  .page{margin-left:0}
  .wrap{padding:0 22px}
  .hero{height:auto;min-height:0;max-height:62vh;padding-top:60px}
  .hero-inner{padding:0 22px 40px}
  .hero h1{font-size:32px}
  .hero-sub{font-size:15.5px;margin-bottom:24px}
  .hero-cta{margin-bottom:32px}
  .hero-stats{grid-template-columns:repeat(2,1fr);max-width:none}
  .sec{padding:56px 0}
  .sec-title h2{font-size:22px}
  .split{grid-template-columns:1fr;gap:24px}
  .index-grid{grid-template-columns:1fr;gap:0}
  .timeline{padding-left:28px}
  .cta-panel{padding:28px}
  .cta-panel h2{font-size:22px}
}
@media (max-width:767px){
  body{font-size:16px}
  .hero h1{font-size:27px}
  .hero-eyebrow{height:26px;font-size:12px}
  .rail .card{flex:0 0 240px}
  .grid-feature{grid-template-columns:1fr;gap:18px}
  .f-a,.f-b,.f-c{grid-column:span 1}
  .grid-feature .f-a .card-body h3{font-size:19px}
  .news-grid{grid-template-columns:1fr}
  .rank-item{gap:14px;padding:16px 4px}
  .rank-no{font-size:22px;width:38px;flex:0 0 38px}
  .foot-grid{grid-template-columns:1fr;gap:28px;padding:44px 0 32px}
  .foot-bottom{flex-direction:column;align-items:flex-start;justify-content:center;gap:10px;padding:16px 0}
  .btn{height:44px;padding:0 18px}
}
@media (max-width:419px){
  .rail .card{flex:0 0 100%}
  .hero h1{font-size:24px}
  .hero-stats{grid-template-columns:1fr}
}

/* roulang page: article */
:root{
  --bg-0:#080D0B; --bg-1:#0F1714; --bg-2:#16211D; --bg-3:#1E2C27; --line:#24332D;
  --text-1:#EEF4F1; --text-2:#A7B5AF; --text-3:#6E7C76;
  --brand:#16C784; --brand-deep:#0E8A5C; --brand-soft:rgba(22,199,132,.12);
  --accent:#FF7A2B; --copper:#C8A26A;
  --ok:#35D07F; --warn:#F5C451; --err:#FF5A5A;
  --r-xs:6px; --r-sm:10px; --r-md:14px; --r-lg:22px; --r-full:999px;
  --sh-1:0 2px 0 rgba(0,0,0,.4);
  --sh-2:0 18px 40px -18px rgba(0,0,0,.75);
  --sidenav:240px;
  --font-num:"DIN Alternate","Roboto Mono",ui-monospace,SFMono-Regular,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;background:var(--bg-0);color:var(--text-1);
  font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei",-apple-system,sans-serif;
  font-size:16.5px;line-height:1.8;letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button,input{font:inherit;color:inherit}
ul,ol{padding-left:1.3em}
::selection{background:var(--brand-soft);color:#fff}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px}
.num{font-family:var(--font-num);font-variant-numeric:tabular-nums}

/* ---------- 侧边导航 ---------- */
.topbar{display:none}
.sidenav{
  position:fixed;left:0;top:0;bottom:0;width:var(--sidenav);
  background:var(--bg-1);border-right:1px solid var(--line);
  display:flex;flex-direction:column;padding:22px 14px;z-index:70;
  overflow:hidden;
}
.brand{display:flex;align-items:center;gap:11px;padding:2px 8px 18px;border-bottom:1px solid var(--line);margin-bottom:16px}
.brand-mark{
  width:38px;height:38px;flex:0 0 38px;display:grid;place-items:center;
  border:1px solid var(--brand);border-radius:var(--r-xs);background:var(--brand-soft);
  color:var(--brand);font-family:var(--font-num);font-size:15px;font-weight:700;letter-spacing:.04em;
}
.brand-text{display:flex;flex-direction:column;line-height:1.28;min-width:0;white-space:nowrap}
.brand-text strong{font-size:15px;font-weight:800;letter-spacing:.01em}
.brand-text em{font-style:normal;font-size:11.5px;letter-spacing:.06em;color:var(--text-3)}
.nav-main{display:flex;flex-direction:column;gap:4px}
.nav-item{
  position:relative;display:flex;align-items:center;gap:12px;height:48px;padding:0 12px;
  border-radius:var(--r-sm);color:var(--text-2);font-size:15px;white-space:nowrap;
  transition:background .18s cubic-bezier(.2,.7,.3,1),color .18s cubic-bezier(.2,.7,.3,1);
}
.nav-item i{width:20px;flex:0 0 20px;text-align:center;font-size:16px}
.nav-item:hover{background:var(--bg-3);color:var(--text-1)}
.nav-item.is-active{background:var(--brand-soft);color:var(--text-1)}
.nav-item.is-active::before{
  content:"";position:absolute;left:0;top:9px;bottom:9px;width:3px;
  border-radius:0 3px 3px 0;background:var(--brand);
}
.nav-sub{margin-top:auto;display:flex;flex-direction:column;gap:2px;padding-top:16px;border-top:1px solid var(--line)}
.nav-sub a{font-size:14px;color:var(--text-3);padding:8px 12px;border-radius:var(--r-xs);white-space:nowrap;transition:.18s}
.nav-sub a:hover{color:var(--text-1);background:var(--bg-3)}

/* ---------- 主区 ---------- */
.main{margin-left:var(--sidenav);min-height:100vh;display:flex;flex-direction:column}
.wrap{width:100%;max-width:1140px;margin:0 auto;padding:0 32px}
.page{flex:1;padding:36px 0 72px}

/* ---------- 面包屑 ---------- */
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-3);margin-bottom:24px}
.crumbs a{color:var(--text-3);transition:.18s}
.crumbs a:hover{color:var(--brand)}
.crumbs .sep{opacity:.55}
.crumbs .cur{color:var(--text-2);max-width:460px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* ---------- 文章头部 ---------- */
.article-head{margin-bottom:28px}
.pill{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:var(--r-full);
  background:var(--brand-soft);color:var(--brand);font-size:12px;letter-spacing:.06em;font-weight:500;
}
.article-head h1{
  margin:16px 0 20px;font-size:32px;line-height:1.35;font-weight:800;letter-spacing:-.005em;
  overflow-wrap:break-word;
}
.meta-row{display:flex;flex-wrap:wrap;gap:24px;padding-top:16px;border-top:1px solid var(--line)}
.meta-item{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--text-3)}
.meta-item .k{color:var(--text-3)}
.meta-item .v{color:var(--text-2)}

/* ---------- 正文面板 ---------- */
.panel{
  background:var(--bg-1);border:1px solid var(--line);border-radius:var(--r-md);
  padding:48px 56px;box-shadow:var(--sh-1);
}
.prose{max-width:760px;margin:0 auto;font-size:16.5px;line-height:1.85;letter-spacing:.01em;overflow-wrap:break-word}
.prose p{margin:0 0 1.05em}
.prose h2{
  position:relative;margin:2em 0 .65em;padding-left:14px;
  font-size:26px;line-height:1.35;font-weight:700;
}
.prose h2::before{content:"";position:absolute;left:0;top:7px;bottom:7px;width:3px;border-radius:3px;background:var(--brand)}
.prose h3{margin:1.5em 0 .5em;font-size:20px;line-height:1.4;font-weight:700}
.prose h4{margin:1.3em 0 .4em;font-size:17px;line-height:1.5;font-weight:700}
.prose ul,.prose ol{margin:0 0 1.05em;line-height:1.9}
.prose li{margin:.35em 0}
.prose ul li::marker{color:var(--brand)}
.prose ol li::marker{color:var(--brand);font-family:var(--font-num)}
.prose blockquote{
  margin:1.4em 0;padding:18px 20px;background:var(--bg-2);
  border-left:3px solid var(--copper);border-radius:0 var(--r-sm) var(--r-sm) 0;color:var(--text-2);
}
.prose blockquote p:last-child{margin-bottom:0}
.prose img{width:100%;height:auto;border-radius:var(--r-md);margin:1.4em 0 .5em}
.prose figure{margin:1.4em 0}
.prose figcaption{font-size:13px;color:var(--text-3);text-align:center;margin-top:8px}
.prose a{color:var(--brand);border-bottom:1px solid transparent;transition:.18s}
.prose a:hover{border-bottom-color:var(--brand)}
.prose strong{color:#fff;font-weight:600}
.prose code{background:var(--bg-3);padding:2px 6px;border-radius:var(--r-xs);font-family:var(--font-num);font-size:14.5px}
.prose table{width:100%;border-collapse:collapse;margin:1.4em 0;font-family:var(--font-num);font-size:15px}
.prose th{text-align:left;padding:12px 14px;border-bottom:1px solid var(--line);color:var(--text-2);font-weight:600}
.prose td{padding:12px 14px;color:var(--text-1)}
.prose tbody tr:nth-child(odd){background:var(--bg-2)}
.prose tbody tr:nth-child(even){background:var(--bg-1)}
.prose hr{border:0;border-top:1px solid var(--line);margin:2em 0}

/* ---------- 空态 ---------- */
.empty{padding:72px 24px;text-align:center}
.empty i{font-size:40px;color:var(--text-3)}
.empty p{margin:18px 0 24px;font-size:14px;color:var(--text-2)}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;height:48px;padding:0 22px;
  border-radius:var(--r-sm);border:1px solid transparent;font-size:15px;font-weight:500;cursor:pointer;
  transition:background .18s,border-color .18s,color .18s,transform .18s;
}
.btn:active{transform:scale(.98)}
.btn-primary{background:var(--brand);color:var(--bg-0);font-weight:700}
.btn-primary:hover{background:var(--brand-deep)}
.btn-ghost{background:var(--bg-2);border-color:var(--line);color:var(--text-1)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand)}
.text-link{font-size:15px;color:var(--brand);transition:.18s}
.text-link:hover{text-decoration:underline;text-underline-offset:3px}

/* ---------- 相关推荐 ---------- */
.related{margin-top:64px}
.sec-head{display:flex;align-items:baseline;justify-content:space-between;gap:16px;margin-bottom:22px}
.sec-head h2{position:relative;margin:0;padding-left:14px;font-size:24px;line-height:1.35;font-weight:700}
.sec-head h2::before{content:"";position:absolute;left:0;top:6px;bottom:6px;width:3px;border-radius:3px;background:var(--brand)}
.more-link{font-size:14px;color:var(--brand);white-space:nowrap;transition:.18s}
.more-link:hover{text-decoration:underline;text-underline-offset:3px}
.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.card{
  display:block;background:var(--bg-2);border:1px solid var(--line);border-radius:var(--r-md);
  overflow:hidden;transition:transform .18s,border-color .18s,box-shadow .18s;
}
.card:hover{transform:translateY(-3px);border-color:rgba(22,199,132,.45);box-shadow:var(--sh-2)}
.card-thumb{aspect-ratio:16/9;background:var(--bg-3);overflow:hidden}
.card-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .3s}
.card:hover .card-thumb img{transform:scale(1.03)}
.card-body{padding:20px}
.card-body h3{
  margin:0;font-size:16.5px;line-height:1.5;font-weight:700;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.card-time{margin-top:12px;font-family:var(--font-num);font-size:12.5px;color:var(--text-3)}

/* ---------- 返回入口 ---------- */
.back-row{
  display:flex;align-items:center;gap:22px;flex-wrap:wrap;
  margin-top:48px;padding-top:32px;border-top:1px solid var(--line);
}

/* ---------- 页脚 ---------- */
.site-foot{margin-top:auto;background:var(--bg-1);border-top:1px solid var(--line);padding-top:56px}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:32px;padding-bottom:40px}
.foot-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.foot-brand .brand-mark{width:32px;height:32px;flex:0 0 32px;font-size:13px}
.foot-brand strong{font-size:15px;font-weight:800}
.foot-desc{margin:0;max-width:350px;font-size:14px;line-height:1.8;color:var(--text-3)}
.foot-col h4{margin:0 0 14px;font-size:13px;font-weight:600;letter-spacing:.08em;color:var(--text-3)}
.foot-col ul{list-style:none;margin:0;padding:0}
.foot-col li{margin-bottom:10px}
.foot-col a{font-size:15px;color:var(--text-2);transition:.18s}
.foot-col a:hover{color:var(--brand)}
.foot-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  min-height:64px;padding:12px 0;border-top:1px solid var(--line);
  font-size:13.5px;color:var(--text-3);
}
.to-top{color:var(--text-2);transition:.18s}
.to-top:hover{color:var(--brand)}

/* ---------- 遮罩 ---------- */
.drawer-mask{display:none}

/* ---------- 响应式 ---------- */
@media (max-width:1199px){
  :root{--sidenav:216px}
  .wrap{padding:0 26px}
  .panel{padding:40px 36px}
}
@media (max-width:991px){
  :root{--sidenav:88px}
  .sidenav{padding:20px 12px;transition:width .22s cubic-bezier(.2,.7,.3,1)}
  .sidenav:hover{width:240px;box-shadow:var(--sh-2)}
  .brand-text,.nav-item span,.nav-sub{opacity:0;visibility:hidden;transition:opacity .16s}
  .sidenav:hover .brand-text,
  .sidenav:hover .nav-item span,
  .sidenav:hover .nav-sub{opacity:1;visibility:visible}
  .nav-item{justify-content:flex-start}
  .article-head h1{font-size:28px}
  .panel{padding:36px 30px}
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .foot-grid{grid-template-columns:1fr 1fr;gap:30px}
}
@media (max-width:767px){
  body{font-size:16px}
  .topbar{
    display:flex;position:fixed;top:0;left:0;right:0;height:60px;z-index:66;
    align-items:center;justify-content:space-between;gap:12px;padding:0 16px;
    background:var(--bg-1);border-bottom:1px solid var(--line);
  }
  .topbar .brand{padding:0;margin:0;border:0;gap:9px}
  .topbar .brand-mark{width:32px;height:32px;flex:0 0 32px;font-size:13px}
  .topbar .brand-text strong{font-size:14px}
  .topbar .brand-text em{font-size:10.5px}
  .burger{
    width:44px;height:44px;display:grid;place-items:center;cursor:pointer;
    background:var(--bg-2);border:1px solid var(--line);border-radius:var(--r-sm);
    color:var(--text-1);font-size:17px;transition:.18s;
  }
  .burger:hover{border-color:var(--brand);color:var(--brand)}
  .sidenav{
    width:84vw;max-width:320px;transform:translateX(-100%);padding:18px 14px;
    transition:transform .22s cubic-bezier(.2,.7,.3,1);box-shadow:var(--sh-2);
  }
  .sidenav.is-open{transform:translateX(0)}
  .brand-text,.nav-item span,.nav-sub{opacity:1;visibility:visible}
  .drawer-mask{
    display:block;position:fixed;inset:0;z-index:64;background:rgba(0,0,0,.6);
    opacity:0;pointer-events:none;transition:opacity .2s;
  }
  .drawer-mask.is-open{opacity:1;pointer-events:auto}
  .main{margin-left:0;padding-top:60px}
  .wrap{padding:0 18px}
  .page{padding:24px 0 56px}
  .crumbs{margin-bottom:18px}
  .article-head h1{font-size:24px;margin:14px 0 16px}
  .meta-row{gap:16px}
  .panel{padding:20px;border-radius:var(--r-md)}
  .prose{font-size:16px;line-height:1.85}
  .prose h2{font-size:21px}
  .prose h3{font-size:18px}
  .related{margin-top:48px}
  .sec-head h2{font-size:20px}
  .card-grid{
    display:flex;gap:16px;overflow-x:auto;scroll-snap-type:x mandatory;
    margin:0 -18px;padding:2px 18px 10px;-webkit-overflow-scrolling:touch;
  }
  .card-grid::-webkit-scrollbar{display:none}
  .card{flex:0 0 78%;scroll-snap-align:start}
  .btn{height:44px;padding:0 18px}
  .back-row{gap:16px;margin-top:36px;padding-top:24px}
  .site-foot{padding-top:40px}
  .foot-grid{grid-template-columns:1fr;gap:26px;padding-bottom:28px}
  .foot-desc{max-width:100%}
}
@media (max-width:420px){
  .card{flex:0 0 100%}
  .crumbs .cur{max-width:180px}
}

/* roulang page: category1 */
:root{
  --bg-0:#080D0B;
  --bg-1:#0F1714;
  --bg-2:#16211D;
  --bg-3:#1E2C27;
  --line:#24332D;
  --text-1:#EEF4F1;
  --text-2:#A7B5AF;
  --text-3:#6E7C76;
  --brand:#16C784;
  --brand-deep:#0E8A5C;
  --brand-soft:rgba(22,199,132,.12);
  --accent:#FF7A2B;
  --copper:#C8A26A;
  --ok:#35D07F;
  --warn:#F5C451;
  --err:#FF5A5A;
  --font-num:"DIN Alternate","Roboto Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
  --r-xs:6px;
  --r-sm:10px;
  --r-md:14px;
  --r-lg:22px;
  --r-full:999px;
  --sh-1:0 2px 0 rgba(0,0,0,.4);
  --sh-2:0 18px 40px -18px rgba(0,0,0,.75);
  --ease:cubic-bezier(.2,.7,.3,1);
  --nav-w:240px;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg-0);
  color:var(--text-1);
  font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  font-size:16.5px;
  line-height:1.85;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button,input{font:inherit;color:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.35}
p{margin:0}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:var(--r-xs)}

/* ---------- 左侧导航 ---------- */
.sidenav{
  position:fixed;
  top:0;left:0;bottom:0;
  width:var(--nav-w);
  background:var(--bg-1);
  border-right:1px solid var(--line);
  display:flex;
  flex-direction:column;
  gap:26px;
  padding:22px 14px;
  z-index:100;
  transition:width .2s var(--ease);
}
.brand{display:flex;align-items:center;gap:12px;padding:6px 8px;border-radius:var(--r-sm)}
.brand-mark{
  flex:0 0 40px;width:40px;height:40px;
  display:grid;place-items:center;
  border:1.5px solid var(--copper);
  border-radius:var(--r-xs);
  color:var(--copper);
  font-family:var(--font-num);
  font-size:14px;letter-spacing:.04em;
}
.brand-text{display:flex;flex-direction:column;line-height:1.25;min-width:0}
.brand-text strong{font-size:16px;font-weight:800;letter-spacing:.02em}
.brand-text em{font-style:normal;font-size:12px;color:var(--text-3);letter-spacing:.06em}
.nav-main{display:flex;flex-direction:column;gap:4px}
.nav-item{
  position:relative;
  display:flex;align-items:center;gap:12px;
  height:48px;padding:0 12px;
  border-radius:var(--r-sm);
  color:var(--text-2);
  font-size:15px;
  white-space:nowrap;
  transition:background .18s var(--ease),color .18s var(--ease);
}
.nav-item i{width:20px;text-align:center;font-size:15px}
.nav-item:hover{background:var(--bg-3);color:var(--text-1)}
.nav-item.is-active{background:var(--brand-soft);color:var(--text-1)}
.nav-item.is-active::before{
  content:"";position:absolute;left:0;top:10px;bottom:10px;width:3px;
  background:var(--brand);border-radius:0 3px 3px 0;
}
.nav-sub{
  margin-top:auto;display:flex;flex-direction:column;gap:10px;
  padding:16px 12px 4px;border-top:1px solid var(--line);
}
.nav-sub a{font-size:14px;color:var(--text-3);transition:color .18s var(--ease)}
.nav-sub a:hover{color:var(--brand)}

.mobile-top{display:none}
.drawer-mask{display:none}

/* ---------- 页面容器 ---------- */
.page{margin-left:var(--nav-w);min-height:100vh;display:flex;flex-direction:column}
.wrap{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
main{flex:1 1 auto}

/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line);padding:28px 0 56px}
.hero::before{
  content:"";position:absolute;inset:0;
  background-image:url(/assets/images/backpic/back-1.webp);
  background-size:cover;background-position:center;
  opacity:.30;
}
.hero::after{
  content:"";position:absolute;inset:0;
  background:
    linear-gradient(90deg,var(--bg-0) 0%,rgba(8,13,11,.78) 42%,rgba(8,13,11,.34) 100%),
    linear-gradient(180deg,rgba(8,13,11,.55) 0%,var(--bg-0) 94%);
}
.hero .wrap{position:relative;z-index:2}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-3)}
.crumb a:hover{color:var(--brand)}
.crumb .sep{color:var(--text-3)}
.crumb .now{color:var(--text-2)}

.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  height:26px;padding:0 12px;margin-top:26px;
  border:1px solid rgba(200,162,106,.55);
  border-radius:var(--r-full);
  color:var(--copper);
  font-size:12px;letter-spacing:.06em;
}
.hero h1{
  margin-top:18px;
  font-size:44px;line-height:1.15;font-weight:800;letter-spacing:-.01em;
  max-width:760px;
}
.hero .lede{
  margin-top:16px;max-width:720px;
  font-size:16.5px;line-height:1.85;color:var(--text-2);
}
.hero-acts{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 22px;
  border-radius:var(--r-sm);
  border:1px solid transparent;
  font-size:15px;font-weight:500;
  cursor:pointer;
  transition:background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease);
}
.btn:active{transform:scale(.98)}
.btn-primary{background:var(--brand);color:var(--bg-0);font-weight:700}
.btn-primary:hover{background:var(--brand-deep);color:var(--text-1)}
.btn-ghost{background:var(--bg-2);border-color:var(--line);color:var(--text-1)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand)}
.btn-sm{height:44px;padding:0 18px;font-size:14px}
.btn[disabled]{opacity:.4;pointer-events:none}

.hero-stats{
  display:flex;flex-wrap:wrap;gap:44px;
  margin-top:40px;padding-top:24px;border-top:1px solid var(--line);
  max-width:760px;
}
.hero-stats li{display:flex;flex-direction:column;gap:2px}
.hero-stats strong{font-family:var(--font-num);font-size:26px;line-height:1.2;color:var(--text-1)}
.hero-stats span{font-size:12px;letter-spacing:.06em;color:var(--text-3)}

/* ---------- 筛选药丸 ---------- */
.filter-bar{
  display:flex;flex-wrap:wrap;gap:10px;
  padding:26px 0 0;
}
.chip{
  display:inline-flex;align-items:center;gap:8px;
  height:36px;padding:0 16px;
  border-radius:var(--r-full);
  border:1px solid var(--line);
  background:var(--bg-2);
  color:var(--text-2);
  font-size:14px;
  cursor:pointer;
  transition:background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.chip:hover{border-color:rgba(22,199,132,.5);color:var(--text-1)}
.chip.is-on{background:var(--brand-soft);border-color:rgba(22,199,132,.5);color:var(--text-1)}

/* ---------- 通用板块 ---------- */
.sec{padding:72px 0 0}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;flex-wrap:wrap}
.sec-title{position:relative;padding-left:14px;font-size:26px;font-weight:700}
.sec-title::before{
  content:"";position:absolute;left:0;top:7px;bottom:7px;width:3px;
  background:var(--brand);border-radius:2px;
}
.sec-sub{margin-top:10px;font-size:14px;color:var(--text-3);max-width:640px}
.more-link{font-size:14px;color:var(--brand);white-space:nowrap;transition:transform .18s var(--ease)}
.more-link:hover{text-decoration:underline;transform:translateX(2px)}

/* ---------- 海报墙 ---------- */
.poster-grid{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:24px;
  margin-top:30px;
}
.poster{
  background:var(--bg-2);
  border:1px solid var(--line);
  border-radius:var(--r-md);
  overflow:hidden;
  display:flex;flex-direction:column;
  transition:transform .18s var(--ease),border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.poster:hover{transform:translateY(-4px);border-color:rgba(22,199,132,.45);box-shadow:var(--sh-2)}
.poster:focus-visible{transform:translateY(-4px);border-color:rgba(22,199,132,.45)}
.poster-fig{position:relative;aspect-ratio:3/4;overflow:hidden;background:var(--bg-3)}
.poster-fig img{width:100%;height:100%;object-fit:cover;transition:transform .35s var(--ease)}
.poster:hover .poster-fig img{transform:scale(1.04)}
.badge-time{
  position:absolute;left:12px;top:12px;
  display:inline-flex;align-items:center;height:24px;padding:0 10px;
  border-radius:var(--r-full);
  background:rgba(8,13,11,.72);
  font-family:var(--font-num);font-size:12px;letter-spacing:.06em;color:var(--text-1);
}
.badge-tag{
  display:inline-flex;align-items:center;height:22px;padding:0 10px;
  border-radius:var(--r-full);
  background:var(--brand-soft);
  color:var(--brand);
  font-size:12px;letter-spacing:.06em;
}
.poster-body{padding:18px 20px 20px;display:flex;flex-direction:column;gap:10px;flex:1 1 auto}
.poster-body h3{
  font-size:17px;line-height:1.5;font-weight:700;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.poster-body p{
  font-size:14px;line-height:1.7;color:var(--text-2);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.poster-meta{
  margin-top:auto;padding-top:12px;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  font-size:12px;color:var(--text-3);
}
.poster-meta .num{font-family:var(--font-num);letter-spacing:.06em}

/* ---------- 项目索引（纯文字两列） ---------- */
.index-grid{
  display:grid;grid-template-columns:repeat(2,minmax(0,1fr));
  gap:0 48px;margin-top:26px;
  border-top:1px solid var(--line);
}
.index-item{
  display:flex;align-items:center;gap:16px;
  min-height:64px;padding:10px 8px;
  border-bottom:1px solid var(--line);
  transition:background .18s var(--ease);
}
.index-item:hover{background:var(--bg-3)}
.index-item .idx{
  flex:0 0 26px;font-family:var(--font-num);font-size:13px;color:var(--text-3);
}
.index-item .idx-text{font-size:15px;font-weight:500}
.index-item .idx-note{font-size:13px;color:var(--text-3);margin-left:auto;text-align:right}
.index-item i{color:var(--text-3);font-size:12px}

/* ---------- 观看路径编号列表 ---------- */
.path-list{margin-top:26px;border-top:1px solid var(--line)}
.path-item{display:flex;gap:22px;padding:24px 6px;border-bottom:1px solid var(--line)}
.path-num{
  flex:0 0 44px;
  font-family:var(--font-num);font-size:22px;line-height:1.4;color:var(--brand);
}
.path-item h3{font-size:17px;font-weight:700}
.path-item p{margin-top:8px;font-size:15px;line-height:1.85;color:var(--text-2);max-width:760px}

/* ---------- CTA ---------- */
.cta-panel{
  position:relative;
  margin-top:72px;
  background:var(--bg-1);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  padding:40px;
  display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);
  gap:36px;align-items:center;
  overflow:hidden;
}
.cta-panel::before{
  content:"";position:absolute;left:0;right:0;top:0;height:1px;
  background:linear-gradient(90deg,var(--brand),rgba(22,199,132,0));
}
.cta-panel h2{font-size:26px}
.cta-panel .cta-desc{margin-top:12px;font-size:15px;color:var(--text-2);max-width:520px}
.cta-form{display:flex;flex-direction:column;gap:10px}
.field{display:flex;gap:12px;flex-wrap:wrap}
.field input{
  flex:1 1 220px;min-width:0;height:48px;padding:0 16px;
  background:var(--bg-3);
  border:1px solid var(--line);
  border-radius:var(--r-sm);
  color:var(--text-1);
  outline:none;
  transition:border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.field input::placeholder{color:var(--text-3)}
.field input:focus{border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-soft)}
.field input.is-err{border-color:var(--err)}
.form-tip{font-size:12px;line-height:1.6;color:var(--text-3);min-height:18px}
.form-tip.err{color:var(--err)}
.form-tip.ok{color:var(--ok)}

/* ---------- FAQ ---------- */
.faq{margin-top:26px;border-top:1px solid var(--line)}
.faq details{border-bottom:1px solid var(--line)}
.faq summary{
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  min-height:56px;padding:12px 6px;
  cursor:pointer;list-style:none;
  font-size:17px;font-weight:500;
  transition:color .18s var(--ease);
}
.faq summary::-webkit-details-marker{display:none}
.faq summary:hover{color:var(--brand)}
.faq-mark{position:relative;flex:0 0 16px;width:16px;height:16px;transition:transform .18s var(--ease)}
.faq-mark::before,.faq-mark::after{content:"";position:absolute;background:var(--brand);border-radius:2px}
.faq-mark::before{left:0;right:0;top:7px;height:2px}
.faq-mark::after{top:0;bottom:0;left:7px;width:2px}
.faq details[open] .faq-mark{transform:rotate(45deg)}
.faq-body{padding:0 6px 22px}
.faq-body p{max-width:820px;font-size:15px;line-height:1.85;color:var(--text-2)}

/* ---------- 页脚 ---------- */
.site-foot{margin-top:88px;background:var(--bg-1);border-top:1px solid var(--line)}
.foot-grid{
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:36px;
  padding:56px 0 40px;
}
.foot-brand{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.foot-brand strong{font-size:16px;font-weight:800}
.foot-desc{font-size:14px;line-height:1.9;color:var(--text-2);max-width:420px}
.foot-col h4{font-size:13px;letter-spacing:.08em;color:var(--text-3);font-weight:500;margin-bottom:14px}
.foot-col ul{display:flex;flex-direction:column;gap:10px}
.foot-col a{font-size:15px;color:var(--text-2);transition:color .18s var(--ease)}
.foot-col a:hover{color:var(--brand)}
.foot-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  height:64px;border-top:1px solid var(--line);
  font-size:13px;color:var(--text-3);
}
.to-top{display:inline-flex;align-items:center;gap:8px;color:var(--text-2)}
.to-top:hover{color:var(--brand)}

/* ---------- 响应式 ---------- */
@media (min-width:1200px) and (max-width:1439px){
  :root{--nav-w:216px}
  .poster-grid{grid-template-columns:repeat(3,minmax(0,1fr))}
}
@media (min-width:992px) and (max-width:1199px){
  :root{--nav-w:88px}
  .sidenav{overflow:hidden;padding-left:12px;padding-right:12px}
  .sidenav:hover{width:240px;box-shadow:24px 0 48px -24px rgba(0,0,0,.85)}
  .brand-text,.nav-item span,.nav-sub{opacity:0;transition:opacity .15s linear}
  .sidenav:hover .brand-text,.sidenav:hover .nav-item span,.sidenav:hover .nav-sub{opacity:1}
  .nav-item.is-active::before{left:-12px}
  .poster-grid{grid-template-columns:repeat(3,minmax(0,1fr))}
  .hero h1{font-size:36px}
  .cta-panel{grid-template-columns:1fr}
}
@media (max-width:991px){
  .mobile-top{
    display:flex;position:fixed;top:0;left:0;right:0;height:60px;
    align-items:center;justify-content:space-between;gap:12px;
    padding:0 16px;
    background:var(--bg-1);border-bottom:1px solid var(--line);
    z-index:90;
  }
  .mt-brand{display:flex;align-items:center;gap:10px;font-size:15px;font-weight:700}
  .mt-brand .brand-mark{flex:0 0 32px;width:32px;height:32px;font-size:12px}
  .burger{
    width:44px;height:44px;display:grid;place-items:center;
    background:var(--bg-2);border:1px solid var(--line);border-radius:var(--r-sm);
    color:var(--text-1);cursor:pointer;font-size:16px;
  }
  .burger:hover{border-color:var(--brand);color:var(--brand)}
  .sidenav{
    width:84vw;max-width:320px;
    transform:translateX(-100%);
    transition:transform .24s var(--ease);
    z-index:120;
  }
  .sidenav.open{transform:translateX(0)}
  .drawer-mask{
    display:block;position:fixed;inset:0;background:rgba(0,0,0,.6);
    opacity:0;pointer-events:none;transition:opacity .2s linear;z-index:110;
  }
  .drawer-mask.open{opacity:1;pointer-events:auto}
  .page{margin-left:0;padding-top:60px}
  .hero{padding:22px 0 44px}
  .hero h1{font-size:32px}
  .hero-stats{gap:32px;margin-top:32px}
  .poster-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
  .sec{padding:56px 0 0}
  .sec-title{font-size:22px}
  .cta-panel{padding:28px;grid-template-columns:1fr;margin-top:56px}
  .cta-panel h2{font-size:22px}
  .foot-grid{grid-template-columns:1fr 1fr;gap:28px;padding:40px 0 28px}
  .site-foot{margin-top:64px}
}
@media (max-width:767px){
  body{font-size:16px}
  .wrap{padding:0 18px}
  .hero h1{font-size:28px}
  .hero .lede{font-size:15.5px}
  .poster-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
  .poster-body{padding:14px 16px 16px}
  .poster-body h3{font-size:15.5px}
  .index-grid{grid-template-columns:1fr;gap:0}
  .index-item .idx-note{display:none}
  .path-item{gap:14px;padding:20px 2px}
  .path-num{flex:0 0 34px;font-size:19px}
  .faq summary{font-size:16px}
  .foot-grid{grid-template-columns:1fr}
  .foot-bottom{height:auto;padding:16px 0}
}
@media (max-width:420px){
  .poster-grid{grid-template-columns:1fr}
  .hero-acts .btn{width:100%}
  .field input{flex:1 1 100%}
}

/* roulang page: category2 */
*,*::before,*::after{box-sizing:border-box}

:root{
  --bg-0:#080D0B;
  --bg-1:#0F1714;
  --bg-2:#16211D;
  --bg-3:#1E2C27;
  --line:#24332D;
  --text-1:#EEF4F1;
  --text-2:#A7B5AF;
  --text-3:#6E7C76;
  --brand:#16C784;
  --brand-deep:#0E8A5C;
  --brand-soft:rgba(22,199,132,.12);
  --accent:#FF7A2B;
  --copper:#C8A26A;
  --ok:#35D07F;
  --warn:#F5C451;
  --err:#FF5A5A;
  --font-cn:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-num:"DIN Alternate","Roboto Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
  --r-xs:6px;
  --r-sm:10px;
  --r-md:14px;
  --r-lg:22px;
  --r-full:999px;
  --sh-1:0 2px 0 rgba(0,0,0,.4);
  --sh-2:0 18px 40px -18px rgba(0,0,0,.75);
  --nav-w:240px;
  --t:180ms cubic-bezier(.2,.7,.3,1);
}

@media (min-width:992px) and (max-width:1199px){:root{--nav-w:216px}}
@media (max-width:991px){:root{--nav-w:0px}}

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

body{
  margin:0;
  padding-left:var(--nav-w);
  background:var(--bg-0);
  color:var(--text-1);
  font-family:var(--font-cn);
  font-size:16.5px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}

img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button,input{font:inherit;color:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}

:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px}
::selection{background:var(--brand-soft);color:var(--text-1)}

.wrap{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}

/* ============ 左侧导航 ============ */
.sidenav{
  position:fixed;top:0;left:0;bottom:0;
  width:var(--nav-w);
  background:var(--bg-1);
  border-right:1px solid var(--line);
  display:flex;flex-direction:column;
  gap:6px;
  padding:22px 14px 18px;
  overflow-y:auto;
  z-index:60;
}
.sidenav::-webkit-scrollbar{width:6px}
.sidenav::-webkit-scrollbar-thumb{background:var(--bg-3);border-radius:99px}

.brand{display:flex;align-items:center;gap:10px;padding:6px 8px 18px}
.brand-mark{
  flex:0 0 auto;width:38px;height:38px;
  display:grid;place-items:center;
  border:1px solid var(--brand);
  border-radius:var(--r-xs);
  background:var(--brand-soft);
  color:var(--brand);
  font-family:var(--font-num);
  font-size:15px;font-weight:700;letter-spacing:.02em;
}
.brand-text{display:flex;flex-direction:column;line-height:1.25;min-width:0}
.brand-text strong{font-size:15px;font-weight:700;color:var(--text-1);white-space:nowrap}
.brand-text em{font-style:normal;font-size:12px;color:var(--text-2);letter-spacing:.04em;white-space:nowrap}

.nav-main{display:flex;flex-direction:column;gap:4px}
.nav-item{
  position:relative;
  display:flex;align-items:center;gap:12px;
  height:48px;padding:0 12px;
  border-radius:var(--r-sm);
  color:var(--text-2);
  font-size:15px;
  transition:background var(--t),color var(--t);
}
.nav-item i{width:20px;text-align:center;font-size:15px;flex:0 0 auto}
.nav-item span{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.nav-item:hover{background:var(--bg-3);color:var(--text-1)}
.nav-item.is-active{background:var(--brand-soft);color:var(--text-1)}
.nav-item.is-active::before{
  content:"";position:absolute;left:0;top:10px;bottom:10px;
  width:3px;border-radius:2px;background:var(--brand);
}

.nav-sub{
  margin-top:auto;
  padding-top:16px;
  border-top:1px solid var(--line);
  display:flex;flex-direction:column;gap:2px;
}
.nav-sub a{
  display:block;padding:8px 12px;
  border-radius:var(--r-xs);
  color:var(--text-3);font-size:14px;
  transition:background var(--t),color var(--t);
}
.nav-sub a:hover{background:var(--bg-3);color:var(--text-1)}

/* ============ 移动端顶栏与抽屉 ============ */
.mobile-bar{
  display:none;
  position:fixed;top:0;left:0;right:0;height:60px;
  align-items:center;justify-content:space-between;
  padding:0 16px;
  background:var(--bg-1);
  border-bottom:1px solid var(--line);
  z-index:58;
}
.brand-sm{display:flex;align-items:center;gap:9px}
.brand-sm .brand-mark{width:34px;height:34px;font-size:13px}
.brand-sm .brand-text strong{font-size:14px}
.brand-sm .brand-text em{font-size:11px}
.burger{
  width:44px;height:44px;
  display:grid;place-items:center;
  background:transparent;border:1px solid var(--line);
  border-radius:var(--r-sm);color:var(--text-2);
  cursor:pointer;transition:border-color var(--t),color var(--t);
}
.burger:hover{border-color:var(--brand);color:var(--brand)}

.drawer-mask{
  position:fixed;inset:0;
  background:rgba(0,0,0,.6);
  opacity:0;pointer-events:none;
  transition:opacity var(--t);
  z-index:55;
}
.drawer-mask.is-on{opacity:1;pointer-events:auto}

@media (max-width:991px){
  body{padding-left:0;padding-top:60px}
  .mobile-bar{display:flex}
  .sidenav{
    width:84vw;max-width:320px;
    transform:translateX(-102%);
    transition:transform var(--t);
  }
  .sidenav.is-open{transform:none;box-shadow:var(--sh-2)}
}

/* ============ 首屏 ============ */
.hero{
  position:relative;
  min-height:34vh;
  display:flex;align-items:flex-end;
  overflow:hidden;
  border-bottom:1px solid var(--line);
}
.hero-bg{
  position:absolute;inset:0;
  background:url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
  transform:scale(1.03);
}
.hero-bg::after{
  content:"";position:absolute;inset:0;
  background:
    linear-gradient(90deg,rgba(8,13,11,.95) 0%,rgba(8,13,11,.74) 46%,rgba(8,13,11,.34) 100%),
    linear-gradient(180deg,rgba(8,13,11,.30) 0%,rgba(8,13,11,.96) 100%);
}
.hero-inner{
  position:relative;z-index:2;
  width:100%;max-width:1200px;margin:0 auto;
  padding:64px 24px 34px;
}
.crumb{
  display:flex;align-items:center;gap:8px;
  font-size:13px;color:var(--text-3);
  margin-bottom:16px;
}
.crumb a{color:var(--text-3);transition:color var(--t)}
.crumb a:hover{color:var(--brand)}
.crumb .sep{color:var(--text-3);opacity:.7}
.crumb .now{color:var(--text-2)}

.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  height:26px;padding:0 12px;margin-bottom:14px;
  border:1px solid rgba(200,162,106,.55);
  border-radius:var(--r-full);
  color:var(--copper);
  font-size:12px;letter-spacing:.06em;
}
.hero h1{
  font-size:36px;line-height:1.3;font-weight:800;
  letter-spacing:.01em;margin-bottom:14px;max-width:820px;
}
.hero p.lead{
  max-width:760px;
  color:#C6D3CD;
  font-size:16px;line-height:1.85;
}
.filters{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
.chip{
  height:34px;padding:0 15px;
  border-radius:var(--r-full);
  border:1px solid var(--line);
  background:rgba(15,23,20,.6);
  color:var(--text-2);
  font-size:13px;letter-spacing:.03em;
  cursor:pointer;
  transition:border-color var(--t),color var(--t),background var(--t);
}
.chip:hover{border-color:rgba(22,199,132,.5);color:var(--text-1)}
.chip.is-on{background:var(--brand-soft);border-color:rgba(22,199,132,.55);color:var(--text-1)}

@media (max-width:991px){
  .hero{min-height:48vh}
  .hero h1{font-size:30px}
}
@media (max-width:560px){
  .hero{min-height:54vh}
  .hero-inner{padding:40px 18px 26px}
  .hero h1{font-size:25px}
  .hero p.lead{font-size:15px}
  .wrap{padding:0 18px}
}

/* ============ 板块通用 ============ */
.sec{padding:72px 0}
.sec-tight{padding:56px 0}
.sec-head{
  display:flex;align-items:flex-end;justify-content:space-between;
  gap:16px;margin-bottom:28px;
}
.sec-title{
  position:relative;
  padding-left:14px;
  font-size:26px;line-height:1.35;font-weight:700;
}
.sec-title::before{
  content:"";position:absolute;left:0;top:.18em;bottom:.18em;
  width:3px;border-radius:2px;background:var(--brand);
}
.sec-sub{margin-top:8px;color:var(--text-2);font-size:14px;padding-left:14px}
.sec-tools{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.rail-btn{
  width:36px;height:36px;
  display:inline-grid;place-items:center;
  border-radius:var(--r-full);
  border:1px solid var(--line);
  background:transparent;color:var(--text-2);
  cursor:pointer;
  transition:border-color var(--t),color var(--t);
}
.rail-btn:hover{border-color:var(--brand);color:var(--brand)}
.link-more{
  color:var(--brand);font-size:14px;
  display:inline-flex;align-items:center;gap:6px;
  transition:transform var(--t);
}
.link-more:hover{text-decoration:underline;text-underline-offset:3px;transform:translateX(1px)}

@media (max-width:991px){.sec{padding:56px 0}.sec-title{font-size:22px}}
@media (max-width:560px){.sec{padding:48px 0}.sec-head{flex-direction:column;align-items:flex-start;gap:14px}}

/* ============ 横滑轨 ============ */
.rail{
  display:flex;gap:16px;
  overflow-x:auto;
  scroll-snap-type:x mandatory;
  padding-bottom:6px;
  scrollbar-width:none;
  -ms-overflow-style:none;
}
.rail::-webkit-scrollbar{display:none}
.rail-card{
  flex:0 0 272px;
  scroll-snap-align:start;
  background:var(--bg-2);
  border:1px solid var(--line);
  border-radius:var(--r-md);
  overflow:hidden;
  transition:border-color var(--t),transform var(--t),box-shadow var(--t);
}
.rail-card:hover{
  border-color:rgba(22,199,132,.45);
  transform:translateY(-3px);
  box-shadow:var(--sh-2);
}
.thumb{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--bg-3)}
.thumb img{width:100%;height:100%;object-fit:cover;transition:transform .35s cubic-bezier(.2,.7,.3,1)}
.rail-card:hover .thumb img{transform:scale(1.04)}
.badge-num{
  position:absolute;left:10px;bottom:10px;
  height:24px;padding:0 10px;
  display:inline-flex;align-items:center;
  border-radius:var(--r-full);
  background:rgba(8,13,11,.72);
  color:var(--text-1);
  font-family:var(--font-num);font-size:12px;letter-spacing:.06em;
}
.rail-body{padding:16px 18px 18px}
.rail-body h3{font-size:16.5px;line-height:1.5;font-weight:600;margin-bottom:8px}
.rail-body p{color:var(--text-2);font-size:14px;line-height:1.7}
.rail-meta{
  margin-top:12px;
  display:flex;align-items:center;gap:10px;
  color:var(--text-3);font-size:13px;
  font-family:var(--font-num);letter-spacing:.04em;
}
.rail-meta .dot{width:4px;height:4px;border-radius:50%;background:var(--text-3)}

/* ============ 卡片网格 ============ */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.card{
  background:var(--bg-2);
  border:1px solid var(--line);
  border-radius:var(--r-md);
  overflow:hidden;
  display:flex;flex-direction:column;
  transition:border-color var(--t),transform var(--t),box-shadow var(--t);
}
.card:hover{
  border-color:rgba(22,199,132,.45);
  transform:translateY(-3px);
  box-shadow:var(--sh-2);
}
.card-body{padding:18px 20px 20px;display:flex;flex-direction:column;flex:1}
.card-body h3{font-size:17px;line-height:1.5;font-weight:600;margin-bottom:8px}
.card-body p{color:var(--text-2);font-size:14px;line-height:1.7;margin-bottom:14px}
.card-foot{
  margin-top:auto;
  padding-top:12px;
  border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  color:var(--text-3);font-size:12.5px;
}
.card-foot .cat{
  display:inline-flex;align-items:center;
  height:22px;padding:0 10px;
  border-radius:var(--r-full);
  background:var(--brand-soft);
  color:var(--brand);
  font-size:12px;letter-spacing:.06em;
}
.card-foot .time{font-family:var(--font-num);letter-spacing:.04em}

@media (max-width:991px){.grid-3{grid-template-columns:repeat(2,1fr)}}
@media (max-width:560px){
  .grid-3{grid-template-columns:1fr;gap:18px}
  .rail-card{flex:0 0 78vw}
}

/* ============ 时间轴 ============ */
.tl-panel{
  background:var(--bg-1);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  padding:36px 36px 14px;
}
.tl{position:relative;padding-left:28px}
.tl::before{
  content:"";position:absolute;left:5px;top:10px;bottom:22px;
  width:1px;background:var(--line);
}
.tl-item{position:relative;padding-bottom:26px}
.tl-item::before{
  content:"";position:absolute;left:-28px;top:9px;
  width:11px;height:11px;border-radius:50%;
  background:var(--bg-0);border:1px solid var(--brand);
}
.tl-time{
  display:inline-block;
  font-family:var(--font-num);
  font-size:13.5px;letter-spacing:.08em;
  color:var(--copper);
  margin-bottom:4px;
}
.tl-item h3{font-size:17px;font-weight:600;line-height:1.5;margin-bottom:4px}
.tl-item p{color:var(--text-2);font-size:14.5px;max-width:720px}

@media (max-width:560px){.tl-panel{padding:26px 20px 6px}}

/* ============ FAQ ============ */
.faq-list{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item summary{
  list-style:none;
  min-height:56px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:14px 2px;
  cursor:pointer;
  font-size:16.5px;font-weight:500;color:var(--text-1);
  transition:color var(--t);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--brand)}
.faq-item summary .ic{
  flex:0 0 auto;
  width:22px;height:22px;
  display:grid;place-items:center;
  color:var(--text-2);font-size:13px;
  transition:transform var(--t),color var(--t);
}
.faq-item[open] summary .ic{transform:rotate(45deg);color:var(--brand)}
.faq-a{
  padding:0 2px 20px;
  max-width:820px;
  color:var(--text-2);
  font-size:15.5px;line-height:1.85;
}

/* ============ CTA ============ */
.cta-box{
  position:relative;
  background:var(--bg-1);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  padding:40px;
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:32px;
  align-items:center;
  overflow:hidden;
}
.cta-box::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,var(--brand),transparent);
}
.cta-box h2{font-size:24px;line-height:1.4;font-weight:700;margin-bottom:10px}
.cta-box p{color:var(--text-2);font-size:15px;max-width:420px}
.sub-form{display:flex;gap:12px}
.sub-form input{
  flex:1;min-width:0;height:48px;padding:0 16px;
  background:var(--bg-3);
  border:1px solid var(--line);
  border-radius:var(--r-sm);
  color:var(--text-1);
  transition:border-color var(--t),box-shadow var(--t);
}
.sub-form input::placeholder{color:var(--text-3)}
.sub-form input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-soft)}
.form-tip{margin-top:10px;font-size:12.5px;color:var(--text-3)}
.form-tip.is-err{color:var(--err)}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 22px;
  border:1px solid transparent;
  border-radius:var(--r-sm);
  background:var(--brand);
  color:#04120C;
  font-size:15px;font-weight:600;
  cursor:pointer;white-space:nowrap;
  transition:background var(--t),color var(--t),border-color var(--t),transform var(--t),opacity var(--t);
}
.btn:hover{background:var(--brand-deep)}
.btn:active{transform:scale(.98)}
.btn:disabled{opacity:.4;cursor:not-allowed}
.btn-ghost{
  background:var(--bg-2);
  border-color:var(--line);
  color:var(--text-1);
}
.btn-ghost:hover{background:var(--bg-2);border-color:var(--brand);color:var(--brand)}

@media (max-width:860px){
  .cta-box{grid-template-columns:1fr;padding:30px 24px;gap:22px}
  .sub-form{flex-direction:column}
  .btn{width:100%}
  .btn-inline{width:auto}
}
@media (max-width:560px){.cta-box{border-radius:var(--r-md)}}

/* ============ 页脚 ============ */
.site-foot{
  margin-top:72px;
  background:var(--bg-1);
  border-top:1px solid var(--line);
  padding:64px 0 0;
}
.foot-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1.2fr;
  gap:32px;
}
.foot-col h4{
  margin-bottom:16px;
  font-size:13px;font-weight:600;
  letter-spacing:.08em;
  color:var(--text-3);
}
.foot-col li a{
  display:inline-block;
  font-size:15px;line-height:2;
  color:var(--text-2);
  transition:color var(--t);
}
.foot-col li a:hover{color:var(--brand)}
.foot-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.foot-brand strong{font-size:16px;font-weight:700}
.foot-desc{color:var(--text-2);font-size:14.5px;max-width:430px}
.foot-bottom{
  margin-top:48px;
  min-height:64px;
  border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;
  gap:12px;flex-wrap:wrap;
  font-size:13px;color:var(--text-3);
}
.to-top{display:inline-flex;align-items:center;gap:6px;color:var(--text-3);transition:color var(--t)}
.to-top:hover{color:var(--brand)}

@media (max-width:991px){.foot-grid{grid-template-columns:1fr 1fr}}
@media (max-width:560px){
  .site-foot{padding-top:48px;margin-top:56px}
  .foot-grid{grid-template-columns:1fr;gap:24px}
  .foot-bottom{font-size:12.5px;padding:14px 0}
}

/* roulang page: category3 */
:root{
  --bg-0:#080D0B; --bg-1:#0F1714; --bg-2:#16211D; --bg-3:#1E2C27; --line:#24332D;
  --text-1:#EEF4F1; --text-2:#A7B5AF; --text-3:#6E7C76;
  --brand:#16C784; --brand-deep:#0E8A5C; --brand-soft:rgba(22,199,132,.12);
  --accent:#FF7A2B; --copper:#C8A26A;
  --ok:#35D07F; --warn:#F5C451; --err:#FF5A5A;
  --r-xs:6px; --r-sm:10px; --r-md:14px; --r-lg:22px; --r-full:999px;
  --sh-1:0 2px 0 rgba(0,0,0,.4);
  --sh-2:0 18px 40px -18px rgba(0,0,0,.75);
  --font-num:"DIN Alternate","Roboto Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
  --ease:180ms cubic-bezier(.2,.7,.3,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--bg-0);color:var(--text-1);
  font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  font-size:16.5px;line-height:1.8;letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button,input{font:inherit;color:inherit}
ul{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px}
::selection{background:var(--brand-soft);color:var(--text-1)}

/* ============ 左侧导航 ============ */
.sidenav{
  position:fixed;top:0;left:0;bottom:0;width:240px;z-index:60;
  background:var(--bg-1);border-right:1px solid var(--line);
  display:flex;flex-direction:column;padding:24px 16px 20px;
}
.brand{display:flex;align-items:center;gap:12px;padding:4px 6px 20px;border-bottom:1px solid var(--line)}
.brand-mark{
  width:42px;height:42px;flex:none;border-radius:10px;border:1px solid var(--brand);
  color:var(--brand);font-family:var(--font-num);font-weight:700;font-size:14px;
  display:grid;place-items:center;letter-spacing:.06em;background:var(--brand-soft);
}
.brand-text strong{display:block;font-size:15px;font-weight:700;color:var(--text-1);letter-spacing:.02em}
.brand-text em{display:block;font-style:normal;font-size:12px;color:var(--text-3);letter-spacing:.08em;margin-top:2px}
.nav-main{margin-top:18px;display:flex;flex-direction:column;gap:4px;flex:1}
.nav-item{
  position:relative;display:flex;align-items:center;gap:12px;height:48px;padding:0 12px;
  border-radius:var(--r-sm);color:var(--text-2);font-size:15px;transition:background var(--ease),color var(--ease);
}
.nav-item i{width:20px;flex:none;text-align:center;font-size:15px}
.nav-item:hover{background:var(--bg-3);color:var(--text-1)}
.nav-item.is-active{background:var(--brand-soft);color:var(--text-1)}
.nav-item.is-active::before{
  content:"";position:absolute;left:0;top:10px;bottom:10px;width:3px;border-radius:2px;background:var(--brand);
}
.nav-sub{display:flex;flex-direction:column;gap:2px;padding-top:16px;border-top:1px solid var(--line)}
.nav-sub a{font-size:14px;color:var(--text-3);padding:8px 12px;border-radius:var(--r-xs);transition:var(--ease)}
.nav-sub a:hover{color:var(--text-1);background:var(--bg-3)}

.mobile-bar{
  display:none;position:fixed;top:0;left:0;right:0;height:60px;z-index:70;
  align-items:center;justify-content:space-between;padding:0 16px;
  background:var(--bg-1);border-bottom:1px solid var(--line);
}
.mb-brand{display:flex;align-items:center;gap:10px;font-size:15px;font-weight:700;color:var(--text-1)}
.mb-brand .brand-mark{width:34px;height:34px;font-size:12px}
.mb-toggle{
  width:44px;height:44px;border-radius:var(--r-sm);border:1px solid var(--line);
  background:var(--bg-2);color:var(--text-1);cursor:pointer;transition:var(--ease);
}
.mb-toggle:hover{border-color:var(--brand);color:var(--brand)}
.nav-mask{
  position:fixed;inset:0;background:rgba(0,0,0,.6);z-index:59;
  opacity:0;visibility:hidden;transition:opacity var(--ease),visibility var(--ease);
}
.nav-mask.show{opacity:1;visibility:visible}

/* ============ 布局 ============ */
.page{margin-left:240px;min-height:100vh;display:flex;flex-direction:column}
.wrap{width:100%;max-width:1180px;margin:0 auto;padding:0 32px}
main{flex:1;padding-bottom:96px}

/* ============ 面包屑 ============ */
.crumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text-3);padding:28px 0 0}
.crumb a{color:var(--text-3);transition:color var(--ease)}
.crumb a:hover{color:var(--brand)}
.crumb span.sep{color:var(--line)}

/* ============ 分类首屏 ============ */
.cat-hero{
  margin-top:24px;border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;
  padding:52px 48px 44px;position:relative;
  background-image:
    linear-gradient(90deg, rgba(8,13,11,.95) 0%, rgba(8,13,11,.78) 52%, rgba(8,13,11,.42) 100%),
    linear-gradient(180deg, rgba(8,13,11,.15) 0%, rgba(8,13,11,.92) 100%),
    url('/assets/images/backpic/back-1.webp');
  background-size:cover;background-position:center;
}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;height:24px;padding:0 12px;border-radius:var(--r-full);
  border:1px solid var(--copper);color:var(--copper);font-size:12px;letter-spacing:.06em;
  font-family:var(--font-num);background:transparent;
}
.cat-hero h1{
  margin-top:20px;font-size:32px;line-height:1.3;font-weight:800;max-width:820px;letter-spacing:.01em;
}
.cat-hero .lede{margin-top:16px;color:var(--text-2);font-size:16.5px;line-height:1.8;max-width:720px}
.chip-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px}
.chip{
  display:inline-flex;align-items:center;gap:6px;height:34px;padding:0 16px;border-radius:var(--r-full);
  border:1px solid var(--line);background:rgba(15,23,20,.66);color:var(--text-2);font-size:13px;
  cursor:pointer;transition:var(--ease);
}
.chip:hover{border-color:var(--brand);color:var(--text-1)}
.chip.is-on{background:var(--brand-soft);border-color:rgba(22,199,132,.45);color:var(--text-1)}

/* ============ 目录 + 编号列表 ============ */
.cat-body{display:grid;grid-template-columns:236px 1fr;gap:48px;align-items:start;margin-top:64px}
.toc{
  position:sticky;top:28px;background:var(--bg-1);border:1px solid var(--line);
  border-radius:var(--r-md);padding:20px 16px;
}
.toc h3{font-size:12px;letter-spacing:.1em;color:var(--text-3);font-weight:600;padding:0 8px 12px}
.toc a{
  display:flex;align-items:center;gap:12px;padding:11px 10px;border-radius:var(--r-xs);
  font-size:14px;color:var(--text-2);transition:var(--ease);
}
.toc a .num{font-family:var(--font-num);font-size:12px;color:var(--text-3);flex:none}
.toc a:hover{background:var(--bg-3);color:var(--text-1)}
.toc a:hover .num{color:var(--brand)}
.toc .toc-foot{
  margin-top:14px;padding:14px 10px 4px;border-top:1px solid var(--line);
  font-size:12.5px;line-height:1.7;color:var(--text-3);
}

.group{margin-bottom:56px;scroll-margin-top:28px}
.group:last-child{margin-bottom:0}
.group-head{
  display:flex;align-items:flex-end;justify-content:space-between;gap:16px;
  padding-bottom:16px;border-bottom:1px solid var(--line);
}
.group-head h2{position:relative;padding-left:14px;font-size:22px;line-height:1.4;font-weight:700}
.group-head h2::before{
  content:"";position:absolute;left:0;top:5px;bottom:5px;width:3px;border-radius:2px;background:var(--brand);
}
.group-head .count{font-family:var(--font-num);font-size:12px;color:var(--text-3);letter-spacing:.06em}
.more-link{font-size:14px;color:var(--brand);display:inline-flex;align-items:center;gap:6px;transition:var(--ease)}
.more-link:hover{text-decoration:underline;text-underline-offset:3px;transform:translateX(1px)}

.rank-list{margin-top:6px}
.rank-item{
  display:flex;align-items:center;gap:20px;padding:18px 10px;border-bottom:1px solid var(--line);
  transition:background var(--ease);
}
.rank-item:hover{background:var(--bg-3)}
.rank-no{
  width:46px;flex:none;font-family:var(--font-num);font-size:22px;line-height:1;
  color:var(--text-3);letter-spacing:.02em;transition:color var(--ease);
}
.rank-item:hover .rank-no{color:var(--brand)}
.rank-thumb{
  width:64px;height:64px;flex:none;border-radius:var(--r-xs);overflow:hidden;
  border:1px solid var(--line);background:var(--bg-2);
}
.rank-thumb img{width:100%;height:100%;object-fit:cover;transition:transform var(--ease)}
.rank-item:hover .rank-thumb img{transform:scale(1.05)}
.rank-txt{flex:1;min-width:0}
.rank-txt h3{
  font-size:16.5px;font-weight:600;line-height:1.5;color:var(--text-1);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.rank-txt p{
  margin-top:5px;font-size:14px;line-height:1.7;color:var(--text-2);
  display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden;
}
.rank-meta{
  flex:none;text-align:right;font-family:var(--font-num);font-size:12px;color:var(--text-3);
  display:flex;align-items:center;gap:10px;
}
.rank-meta i{color:var(--text-3);font-size:13px;transition:color var(--ease),transform var(--ease)}
.rank-item:hover .rank-meta i{color:var(--brand);transform:translateX(2px)}

/* ============ 观察重点 ============ */
.spot{
  display:grid;grid-template-columns:1.02fr 1fr;border:1px solid var(--line);
  border-radius:var(--r-md);overflow:hidden;background:var(--bg-1);
}
.spot-media{position:relative;min-height:280px}
.spot-media img{width:100%;height:100%;object-fit:cover;position:absolute;inset:0}
.spot-body{padding:36px 34px}
.spot-body .tag{
  display:inline-block;height:24px;line-height:24px;padding:0 10px;border-radius:var(--r-full);
  background:var(--brand-soft);color:var(--brand);font-size:12px;letter-spacing:.06em;
}
.spot-body h2{margin-top:16px;font-size:24px;line-height:1.4;font-weight:700}
.spot-body p{margin-top:14px;color:var(--text-2);font-size:15.5px;line-height:1.85}
.spot-list{margin-top:20px;border-top:1px solid var(--line)}
.spot-list li{
  display:flex;align-items:center;gap:12px;padding:12px 0;border-bottom:1px solid var(--line);
  font-size:14.5px;color:var(--text-2);
}
.spot-list li .num{font-family:var(--font-num);font-size:12px;color:var(--brand)}
.spot-list li:last-child{border-bottom:0}

/* ============ 数据条 ============ */
.stat-row{
  display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);
  border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden;margin-top:56px;
}
.stat{background:var(--bg-1);padding:26px 24px}
.stat b{display:block;font-family:var(--font-num);font-size:28px;line-height:1.2;color:var(--brand)}
.stat span{display:block;margin-top:8px;font-size:13px;color:var(--text-3);letter-spacing:.04em}
.stat em{display:block;margin-top:6px;font-style:normal;font-size:13px;color:var(--text-2)}

/* ============ FAQ ============ */
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:20px}
.sec-head h2{position:relative;padding-left:14px;font-size:26px;line-height:1.35;font-weight:700}
.sec-head h2::before{
  content:"";position:absolute;left:0;top:6px;bottom:6px;width:3px;border-radius:2px;background:var(--brand);
}
.sec-head .sec-note{font-size:14px;color:var(--text-3)}
.faq{margin-top:56px}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item:first-of-type{border-top:1px solid var(--line)}
.faq-item summary{
  list-style:none;cursor:pointer;min-height:56px;display:flex;align-items:center;justify-content:space-between;
  gap:16px;padding:14px 4px;font-size:16.5px;font-weight:500;color:var(--text-1);transition:color var(--ease);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--brand)}
.faq-item summary::after{
  content:"+";font-family:var(--font-num);font-size:20px;line-height:1;color:var(--brand);
  transition:transform var(--ease);flex:none;
}
.faq-item[open] summary::after{transform:rotate(45deg)}
.faq-answer{max-width:820px;padding:0 4px 22px;color:var(--text-2);font-size:15.5px;line-height:1.85}

/* ============ CTA ============ */
.cta-wrap{margin-top:72px}
.cta-panel{
  position:relative;background:var(--bg-1);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:44px 48px;display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center;overflow:hidden;
}
.cta-panel::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,var(--brand),transparent);
}
.cta-panel h2{font-size:24px;line-height:1.4;font-weight:700}
.cta-panel .cta-desc{margin-top:12px;color:var(--text-2);font-size:15px;line-height:1.8;max-width:420px}
.cta-form{display:flex;gap:12px}
.cta-form input{
  flex:1;height:48px;padding:0 16px;border-radius:var(--r-sm);border:1px solid var(--line);
  background:var(--bg-3);color:var(--text-1);transition:var(--ease);
}
.cta-form input::placeholder{color:var(--text-3)}
.cta-form input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-soft)}
.cta-form input.is-err{border-color:var(--err);box-shadow:0 0 0 3px rgba(255,90,90,.14)}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;height:48px;padding:0 22px;
  border-radius:var(--r-sm);border:1px solid transparent;font-size:15px;font-weight:500;
  cursor:pointer;transition:background var(--ease),border-color var(--ease),color var(--ease),transform var(--ease);
}
.btn:active{transform:scale(.98)}
.btn-primary{background:var(--brand);color:var(--bg-0)}
.btn-primary:hover{background:var(--brand-deep)}
.btn-ghost{background:var(--bg-2);border-color:var(--line);color:var(--text-1)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand)}
.form-msg{margin-top:10px;font-size:12px;color:var(--err);min-height:16px}
.form-msg.ok{color:var(--ok)}

/* ============ 页脚 ============ */
.site-foot{border-top:1px solid var(--line);background:var(--bg-1);margin-top:96px}
.foot-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px;padding:56px 0 40px;
}
.foot-brand{display:flex;align-items:center;gap:12px}
.foot-brand strong{font-size:15.5px;letter-spacing:.02em}
.foot-desc{margin-top:16px;font-size:14.5px;line-height:1.9;color:var(--text-2);max-width:360px}
.foot-col h4{
  font-size:13px;letter-spacing:.08em;color:var(--text-3);font-weight:600;margin-bottom:16px;
}
.foot-col li{margin-bottom:10px}
.foot-col li a{font-size:15px;color:var(--text-2);line-height:2;transition:var(--ease)}
.foot-col li a:hover{color:var(--brand)}
.foot-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;height:64px;
  border-top:1px solid var(--line);font-size:13px;color:var(--text-3);
}
.to-top{display:inline-flex;align-items:center;gap:8px;color:var(--text-3);transition:var(--ease)}
.to-top:hover{color:var(--brand)}

/* ============ 响应式 ============ */
@media (max-width:1439px){
  .wrap{max-width:1080px}
}
@media (max-width:1199px) and (min-width:992px){
  .sidenav{width:88px;padding:20px 12px}
  .brand{justify-content:center;padding:4px 0 18px}
  .brand-text{display:none}
  .nav-item{justify-content:center;padding:0}
  .nav-item span{display:none}
  .nav-sub{display:none}
  .page{margin-left:88px}
  .cat-body{grid-template-columns:210px 1fr;gap:36px}
}
@media (max-width:991px){
  body{font-size:16px}
  .mobile-bar{display:flex}
  .sidenav{
    left:-330px;width:84vw;max-width:320px;padding:22px 16px;
    transition:left 220ms cubic-bezier(.2,.7,.3,1);box-shadow:var(--sh-2);
  }
  .sidenav.open{left:0}
  .page{margin-left:0;padding-top:60px}
  .wrap{padding:0 20px}
  .cat-hero{padding:36px 26px 32px}
  .cat-hero h1{font-size:26px}
  .cat-body{grid-template-columns:1fr;gap:36px;margin-top:44px}
  .toc{position:static}
  .spot{grid-template-columns:1fr}
  .spot-media{min-height:220px;position:relative}
  .spot-media img{position:relative;height:220px}
  .spot-body{padding:26px 22px}
  .stat-row{grid-template-columns:repeat(3,1fr);margin-top:40px}
  .stat{padding:20px 16px}
  .stat b{font-size:22px}
  .cta-panel{grid-template-columns:1fr;gap:24px;padding:32px 24px}
  .foot-grid{grid-template-columns:1fr 1fr;gap:32px;padding:44px 0 32px}
}
@media (max-width:767px){
  .cat-hero h1{font-size:23px}
  .cat-hero .lede{font-size:15px}
  .rank-item{gap:14px;padding:16px 4px}
  .rank-no{width:34px;font-size:17px}
  .rank-thumb{width:56px;height:56px}
  .rank-txt h3{font-size:15.5px}
  .rank-txt p{display:none}
  .rank-meta{font-size:11px}
  .stat-row{grid-template-columns:1fr}
  .cta-form{flex-direction:column}
  .cta-form .btn{width:100%}
  .foot-bottom{flex-direction:column;height:auto;padding:18px 0;gap:10px;text-align:center}
  main{padding-bottom:64px}
  .group{margin-bottom:44px}
}
@media (max-width:420px){
  .rank-thumb{display:none}
  .cat-hero{padding:28px 18px}
}

/* roulang page: category4 */
:root{
  --bg-0:#080D0B;--bg-1:#0F1714;--bg-2:#16211D;--bg-3:#1E2C27;--line:#24332D;
  --text-1:#EEF4F1;--text-2:#A7B5AF;--text-3:#6E7C76;
  --brand:#16C784;--brand-deep:#0E8A5C;--brand-soft:rgba(22,199,132,.12);
  --accent:#FF7A2B;--copper:#C8A26A;
  --ok:#35D07F;--warn:#F5C451;--err:#FF5A5A;
  --r-xs:6px;--r-sm:10px;--r-md:14px;--r-lg:22px;--r-full:999px;
  --sh-1:0 2px 0 rgba(0,0,0,.4);
  --sh-2:0 18px 40px -18px rgba(0,0,0,.75);
  --nav-w:240px;
  --font-sans:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-num:"DIN Alternate","Roboto Mono",ui-monospace,SFMono-Regular,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body,h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{padding:0;list-style:none}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button,input{font:inherit;color:inherit}
body{
  background:var(--bg-0);color:var(--text-1);
  font-family:var(--font-sans);font-size:16.5px;line-height:1.8;
  padding-left:var(--nav-w);-webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px}

/* ---------- 左侧竖向导航 ---------- */
.sidenav{
  position:fixed;left:0;top:0;bottom:0;width:var(--nav-w);z-index:100;
  background:var(--bg-1);border-right:1px solid var(--line);
  display:flex;flex-direction:column;padding:24px 16px;
}
.brand{display:flex;align-items:center;gap:12px;padding:0 4px}
.brand-mark{
  flex:0 0 40px;width:40px;height:40px;display:grid;place-items:center;
  border:1px solid var(--copper);border-radius:8px;color:var(--copper);
  font-family:var(--font-num);font-size:15px;letter-spacing:.04em;
}
.brand-text{display:flex;flex-direction:column;line-height:1.3}
.brand-text strong{font-size:16px;font-weight:700;letter-spacing:.02em}
.brand-text em{font-style:normal;font-size:12px;color:var(--text-3);letter-spacing:.06em}
.nav-toggle{
  display:none;width:44px;height:44px;margin-left:auto;align-items:center;justify-content:center;
  background:var(--bg-2);border:1px solid var(--line);border-radius:var(--r-sm);cursor:pointer;
  transition:border-color 180ms ease,color 180ms ease;
}
.nav-toggle:hover{border-color:var(--brand);color:var(--brand)}
.nav-main{display:flex;flex-direction:column;gap:4px;margin-top:32px}
.nav-item{
  position:relative;display:flex;align-items:center;gap:12px;height:48px;padding:0 12px;
  border-radius:var(--r-sm);color:var(--text-2);font-size:15px;
  transition:background 180ms cubic-bezier(.2,.7,.3,1),color 180ms cubic-bezier(.2,.7,.3,1);
}
.nav-item i{width:20px;text-align:center;font-size:16px}
.nav-item:hover{background:var(--bg-3);color:var(--text-1)}
.nav-item.is-active{background:var(--brand-soft);color:var(--text-1)}
.nav-item.is-active::before{
  content:"";position:absolute;left:0;top:9px;bottom:9px;width:3px;
  border-radius:2px;background:var(--brand);
}
.nav-sub{margin-top:auto;display:flex;flex-direction:column;gap:2px;padding:16px 12px 0;border-top:1px solid var(--line)}
.nav-sub a{font-size:14px;color:var(--text-3);line-height:2.2;transition:color 180ms ease}
.nav-sub a:hover{color:var(--brand)}
.nav-mask{display:none}

/* ---------- 布局 ---------- */
.wrap{width:100%;max-width:1180px;margin:0 auto;padding:0 32px}
.crumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text-3);padding:28px 0 0}
.crumb a{color:var(--text-3);transition:color 180ms ease}
.crumb a:hover{color:var(--brand)}
.crumb .sep{color:var(--line)}
.crumb .current{color:var(--text-2)}

/* ---------- 分类头部 ---------- */
.intro{position:relative;padding:36px 0 32px;overflow:hidden}
.intro::before{
  content:"";position:absolute;left:0;right:0;top:-30%;height:150%;
  background:url(/assets/images/backpic/back-1.webp) center/cover no-repeat;
  opacity:.16;pointer-events:none;
  -webkit-mask-image:linear-gradient(180deg,#000 0,transparent 78%);
  mask-image:linear-gradient(180deg,#000 0,transparent 78%);
}
.intro > *{position:relative}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;height:26px;padding:0 12px;
  border:1px solid var(--copper);border-radius:var(--r-full);
  color:var(--copper);font-size:12px;letter-spacing:.06em;
}
.intro h1{
  margin-top:18px;font-size:32px;line-height:1.3;font-weight:800;letter-spacing:.01em;
}
.intro .lede{margin-top:14px;max-width:760px;color:var(--text-2);font-size:16.5px}
.chip-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.chip{
  display:inline-flex;align-items:center;height:36px;padding:0 16px;
  border:1px solid var(--line);border-radius:var(--r-full);
  font-size:14px;color:var(--text-2);background:var(--bg-1);
  transition:border-color 180ms ease,color 180ms ease,background 180ms ease;
}
.chip:hover{border-color:rgba(22,199,132,.45);color:var(--text-1)}
.chip.is-on{background:var(--brand-soft);border-color:rgba(22,199,132,.45);color:var(--text-1)}
.scope-bar{
  display:flex;flex-wrap:wrap;gap:8px 28px;margin-top:28px;padding:16px 0;
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  font-size:14px;color:var(--text-2);
}
.scope-bar span{display:inline-flex;align-items:center;gap:10px}
.scope-bar span::before{content:"";width:6px;height:6px;border-radius:2px;background:var(--brand)}

/* ---------- 双栏图文专题 ---------- */
.topics{margin-top:24px}
.topic{
  display:grid;grid-template-columns:repeat(12,1fr);gap:24px;
  align-items:center;padding:64px 0;border-bottom:1px solid var(--line);
}
.topic-media{grid-column:1 / 7}
.topic-body{grid-column:8 / 13}
.topic.rev .topic-media{grid-column:7 / 13}
.topic.rev .topic-body{grid-column:1 / 7}
.topic-media img{
  width:100%;aspect-ratio:16 / 9;object-fit:cover;
  border-radius:var(--r-md);border:1px solid var(--line);
}
.topic-media figure{position:relative}
.topic-media figcaption{
  margin-top:12px;font-size:13px;color:var(--text-3);
}
.step{
  display:inline-block;font-family:var(--font-num);font-size:13px;
  letter-spacing:.12em;color:var(--copper);margin-bottom:12px;
}
.topic-body h2{font-size:26px;line-height:1.35;font-weight:700}
.topic-body > p{margin-top:16px;color:var(--text-2);line-height:1.85;max-width:760px}
.points{margin-top:20px;display:flex;flex-direction:column;gap:10px}
.points li{position:relative;padding-left:20px;color:var(--text-2);line-height:1.8}
.points li::before{
  content:"";position:absolute;left:0;top:11px;width:6px;height:6px;
  border-radius:2px;background:var(--brand);
}
.text-link{
  display:inline-flex;align-items:center;gap:8px;margin-top:22px;
  color:var(--brand);font-size:15px;
  transition:transform 180ms ease;
}
.text-link:hover{text-decoration:underline;text-underline-offset:4px;transform:translateX(2px)}

/* ---------- CTA ---------- */
.cta-panel{
  position:relative;margin:72px 0 8px;padding:40px;
  background:var(--bg-1);border:1px solid var(--line);border-radius:var(--r-lg);
  display:grid;grid-template-columns:1fr 1fr;gap:36px;align-items:center;overflow:hidden;
}
.cta-panel::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,var(--brand),rgba(22,199,132,0));
}
.cta-panel h2{font-size:24px;line-height:1.35;font-weight:700}
.cta-panel .cta-desc{margin-top:12px;color:var(--text-2);font-size:15px}
.cta-form{display:flex;gap:12px;flex-wrap:wrap}
.cta-form input{
  flex:1 1 220px;height:48px;padding:0 16px;background:var(--bg-3);
  border:1px solid var(--line);border-radius:var(--r-sm);color:var(--text-1);
  transition:border-color 180ms ease,box-shadow 180ms ease;
}
.cta-form input::placeholder{color:var(--text-3)}
.cta-form input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-soft)}
.btn-primary{
  display:inline-flex;align-items:center;justify-content:center;height:48px;padding:0 24px;
  background:var(--brand);color:var(--bg-0);font-weight:600;font-size:15px;
  border:0;border-radius:var(--r-sm);cursor:pointer;
  transition:background 180ms ease,transform 180ms ease;
}
.btn-primary:hover{background:var(--brand-deep)}
.btn-primary:active{transform:scale(.98)}
.form-note{margin-top:10px;font-size:12px;color:var(--text-3)}
.form-msg{margin-top:10px;font-size:13px;color:var(--ok);display:none}
.form-msg.is-show{display:block}

/* ---------- FAQ ---------- */
.faq{margin:72px 0 0;border-top:1px solid var(--line)}
.faq h2{font-size:26px;font-weight:700;padding:40px 0 8px}
.faq details{border-bottom:1px solid var(--line)}
.faq summary{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  height:56px;cursor:pointer;font-size:17px;font-weight:500;list-style:none;
  transition:color 180ms ease;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary:hover{color:var(--brand)}
.faq summary i{color:var(--text-3);font-size:14px;transition:transform 180ms ease}
.faq details[open] summary i{transform:rotate(45deg);color:var(--brand)}
.faq .faq-answer{padding:0 0 22px;max-width:820px;color:var(--text-2);line-height:1.85}

/* ---------- 页脚 ---------- */
.site-foot{margin-top:88px;background:var(--bg-1);border-top:1px solid var(--line)}
.foot-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:32px;
  padding:56px 0 32px;
}
.foot-brand{display:flex;align-items:center;gap:12px;margin-bottom:16px}
.foot-brand strong{font-size:15px;font-weight:700;line-height:1.5}
.foot-desc{color:var(--text-3);font-size:14px;line-height:1.9;max-width:340px}
.foot-col h4{
  font-size:13px;letter-spacing:.08em;color:var(--text-3);
  font-weight:600;margin-bottom:14px;
}
.foot-col ul{display:flex;flex-direction:column;gap:6px}
.foot-col a{font-size:15px;color:var(--text-2);line-height:2;transition:color 180ms ease}
.foot-col a:hover{color:var(--brand)}
.foot-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  height:64px;border-top:1px solid var(--line);font-size:13px;color:var(--text-3);
}
.to-top{display:inline-flex;align-items:center;gap:8px;color:var(--text-2);font-size:13px}
.to-top:hover{color:var(--brand)}

/* ---------- 响应式 ---------- */
@media (min-width:992px) and (max-width:1199px){
  :root{--nav-w:88px}
  .sidenav{padding:24px 12px;align-items:center;transition:width 220ms cubic-bezier(.2,.7,.3,1)}
  .sidenav:hover{width:240px;align-items:stretch;box-shadow:var(--sh-2)}
  .brand-text{display:none}
  .sidenav:hover .brand-text{display:flex}
  .nav-item span{display:none}
  .sidenav:hover .nav-item span{display:inline}
  .nav-sub{display:none}
  .sidenav:hover .nav-sub{display:flex}
}
@media (max-width:991px){
  body{padding-left:0;padding-top:60px}
  .sidenav{
    flex-direction:row;align-items:center;gap:12px;
    width:100%;height:60px;bottom:auto;padding:0 16px;
    border-right:0;border-bottom:1px solid var(--line);
  }
  .brand-mark{flex:0 0 34px;width:34px;height:34px;font-size:13px}
  .brand-text strong{font-size:15px}
  .brand-text em{display:none}
  .nav-toggle{display:inline-flex}
  .nav-main{
    position:fixed;top:0;left:0;width:84vw;max-width:320px;height:100%;
    margin:0;padding:88px 16px 130px;background:var(--bg-1);
    overflow-y:auto;transform:translateX(-102%);
    transition:transform 280ms cubic-bezier(.2,.7,.3,1);z-index:121;
  }
  .nav-main .nav-item{height:48px;font-size:15px}
  .nav-sub{
    position:fixed;left:0;bottom:0;width:84vw;max-width:320px;margin:0;
    padding:16px;background:var(--bg-1);border-top:1px solid var(--line);
    flex-direction:row;gap:20px;transform:translateX(-102%);
    transition:transform 280ms cubic-bezier(.2,.7,.3,1);z-index:122;
  }
  .nav-sub a{line-height:1.6}
  body.nav-open .nav-main,body.nav-open .nav-sub{transform:translateX(0)}
  .nav-mask{
    display:block;position:fixed;inset:0;background:rgba(0,0,0,.6);
    opacity:0;visibility:hidden;transition:opacity 220ms ease,visibility 220ms ease;z-index:120;
  }
  body.nav-open .nav-mask{opacity:1;visibility:visible}
  body.nav-open{overflow:hidden}
  .wrap{padding:0 20px}
  .intro h1{font-size:26px}
  .intro .lede{font-size:15.5px}
  .topic{grid-template-columns:1fr;gap:20px;padding:44px 0}
  .topic-media,.topic.rev .topic-media{grid-column:1 / -1}
  .topic-body,.topic.rev .topic-body{grid-column:1 / -1}
  .topic-body h2{font-size:22px}
  .cta-panel{grid-template-columns:1fr;gap:24px;padding:28px;margin:56px 0 0}
  .cta-panel h2{font-size:21px}
  .faq{margin-top:56px}
  .faq h2{font-size:22px}
  .faq summary{font-size:16px;height:auto;min-height:56px;padding:14px 0}
  .foot-grid{grid-template-columns:1fr 1fr;gap:28px;padding:44px 0 24px}
  .foot-bottom{flex-direction:column;height:auto;padding:18px 0;gap:10px;text-align:center}
  .site-foot{margin-top:64px}
}
@media (max-width:520px){
  body{font-size:16px}
  .intro h1{font-size:23px}
  .chip{height:34px;padding:0 14px;font-size:13px}
  .cta-form{flex-direction:column}
  .cta-form input,.btn-primary{width:100%}
  .foot-grid{grid-template-columns:1fr}
  .foot-desc{max-width:100%}
}