/* roulang page: index */
:root{
  --bg-base:#0B1220;
  --bg-elev:#101A2B;
  --bg-elev2:#16233A;
  --brand:#1FD1B2;
  --brand-2:#4D8DFF;
  --accent:#FFB24D;
  --hot:#FF4D6D;
  --ink-1:#EEF3FA;
  --ink-2:#B7C4D6;
  --ink-3:#7C8CA3;
  --line:rgba(255,255,255,.08);
  --glass:rgba(255,255,255,.045);
  --r-lg:18px;
  --r-md:14px;
  --shadow-card:0 18px 40px -24px rgba(0,0,0,.8);
  --mono:ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg-base);
  color:var(--ink-2);
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",sans-serif;
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background:
    radial-gradient(900px 620px at 12% -6%, rgba(31,209,178,.06), transparent 68%),
    radial-gradient(820px 520px at 92% 4%, rgba(77,141,255,.05), transparent 70%),
    linear-gradient(rgba(255,255,255,.026) 1px, transparent 1px) 0 0/100% 46px,
    linear-gradient(90deg, rgba(255,255,255,.026) 1px, transparent 1px) 0 0/46px 100%;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button,input{font-family:inherit}
ul,ol{margin:0;padding:0;list-style:none}
.site-header,main,.site-footer{position:relative;z-index:1}
.container{width:100%;max-width:1240px;margin:0 auto;padding:0 20px}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(11,18,32,.74);
  backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  border-bottom:1px solid transparent;
  transition:background .3s ease,border-color .3s ease;
}
.site-header.is-scrolled{background:rgba(11,18,32,.92);border-bottom-color:var(--line)}
.nav{display:flex;align-items:center;gap:28px;height:68px}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{
  width:30px;height:30px;border-radius:9px;
  background:linear-gradient(135deg,var(--brand),var(--brand-2));
  box-shadow:0 0 0 1px rgba(31,209,178,.45),0 8px 22px -10px rgba(31,209,178,.85);
  display:grid;place-items:center;color:#04231E;font-size:14px;font-weight:800;
}
.brand-word{font-size:16px;font-weight:700;color:var(--ink-1);letter-spacing:.01em;white-space:nowrap}
.nav-menu{display:flex;align-items:center;gap:28px;margin:0 auto}
.nav-link{position:relative;font-size:15px;color:var(--ink-2);padding:6px 0;white-space:nowrap;transition:color .2s ease}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:-8px;height:2px;border-radius:2px;
  background:var(--brand);transform:scaleX(0);transform-origin:left;transition:transform .25s ease;
}
.nav-link:hover{color:var(--ink-1)}
.nav-link:hover::after,.nav-link.is-active::after{transform:scaleX(1)}
.nav-link.is-active{color:var(--ink-1);font-weight:600}
.nav-right{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.cmd-search{
  display:flex;align-items:center;gap:8px;width:260px;height:40px;padding:0 12px;
  border-radius:12px;background:rgba(255,255,255,.05);border:1px solid var(--line);
  transition:border-color .2s ease,box-shadow .2s ease;
}
.cmd-search:focus-within{border-color:var(--brand);box-shadow:0 0 0 3px rgba(31,209,178,.22)}
.cmd-search i{color:var(--ink-3);font-size:13px}
.cmd-search input{flex:1;min-width:0;background:transparent;border:0;outline:none;color:var(--ink-1);font-size:14px}
.cmd-search input::placeholder{color:var(--ink-3)}
.cmd-search .kbd{
  font-family:var(--mono);font-size:11px;color:var(--ink-3);
  border:1px solid var(--line);border-radius:6px;padding:1px 6px;line-height:1.5;
}
.icon-btn{
  width:40px;height:40px;border-radius:12px;display:grid;place-items:center;
  background:var(--glass);border:1px solid var(--line);color:var(--ink-2);
  transition:border-color .2s ease,color .2s ease,transform .2s ease;
}
.icon-btn:hover{border-color:rgba(31,209,178,.55);color:var(--brand);transform:translateY(-1px)}
.nav-toggle{
  display:none;width:42px;height:42px;border-radius:12px;place-items:center;
  background:var(--glass);border:1px solid var(--line);color:var(--ink-1);font-size:16px;cursor:pointer;
}
.nav-toggle:hover{border-color:rgba(31,209,178,.55)}

/* ---------- buttons & badges ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 24px;border-radius:999px;border:1px solid transparent;
  font-size:15px;font-weight:600;cursor:pointer;
  transition:transform .2s ease,box-shadow .25s ease,background .25s ease,border-color .25s ease,color .25s ease;
}
.btn-primary{
  background:linear-gradient(115deg,var(--brand) 0%,var(--brand) 62%,var(--brand-2) 100%);
  color:#04231E;
  box-shadow:0 0 0 1px rgba(31,209,178,.5),0 8px 28px -8px rgba(31,209,178,.55);
}
.btn-primary:hover{
  transform:translateY(-1px);
  filter:brightness(1.08);
  box-shadow:0 0 0 1px rgba(31,209,178,.6),0 12px 38px -8px rgba(31,209,178,.75);
}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{
  background:var(--glass);border-color:var(--line);color:var(--ink-1);
}
.btn-ghost:hover{border-color:rgba(31,209,178,.6);color:var(--brand);transform:translateY(-1px)}
.btn:focus-visible{outline:none;box-shadow:0 0 0 3px rgba(31,209,178,.22)}
.btn-sm{padding:9px 18px;font-size:14px}
.btn[disabled],.btn.is-disabled{opacity:.45;pointer-events:none}
.badge{
  display:inline-flex;align-items:center;height:25px;padding:0 11px;border-radius:999px;
  font-size:12.5px;line-height:1;background:var(--glass);border:1px solid var(--line);color:var(--ink-2);
  white-space:nowrap;
}
.badge--brand{border-color:rgba(31,209,178,.5);color:var(--brand)}
.badge--amber{border-color:rgba(255,178,77,.5);color:var(--accent)}
.badge--hot{border-color:rgba(255,77,109,.5);color:var(--hot)}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;color:var(--brand);
  letter-spacing:.08em;margin-bottom:14px;
}
.eyebrow::before{content:"";width:14px;height:2px;border-radius:2px;background:var(--brand)}

/* ---------- hero ---------- */
.hero{position:relative;padding:76px 0 92px;overflow:hidden}
.hero-bg{
  position:absolute;inset:0;
  background:url(/assets/images/backpic/back-1.webp) center/cover no-repeat;
  opacity:.16;
}
.hero-bg::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(11,18,32,.55) 0%,rgba(11,18,32,.86) 62%,var(--bg-base) 100%);
}
.hero .container{position:relative;z-index:2}
.hero-grid{display:grid;grid-template-columns:minmax(0,1fr) 340px;gap:56px;align-items:center}
.hero-title{
  font-size:clamp(30px,4.6vw,54px);line-height:1.15;font-weight:800;
  letter-spacing:-.02em;color:var(--ink-1);margin:0 0 18px;
}
.hero-sub{font-size:clamp(17px,1.6vw,20px);font-weight:600;color:var(--brand);margin:0 0 16px}
.hero-desc{font-size:16px;color:var(--ink-2);max-width:600px;margin:0 0 28px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:32px}
.hero-stats{display:flex;flex-wrap:wrap;gap:12px}
.stat-pill{
  display:inline-flex;align-items:center;gap:8px;padding:9px 15px;border-radius:999px;
  background:var(--glass);border:1px solid var(--line);font-size:13px;color:var(--ink-2);
  backdrop-filter:blur(14px) saturate(140%);
}
.stat-pill i{color:var(--brand);font-size:12px}
.hero-visual{display:flex;justify-content:flex-end}
.vcard{
  position:relative;display:block;width:100%;max-width:340px;aspect-ratio:9/16;
  border-radius:20px;overflow:hidden;border:1px solid var(--line);
  background:var(--bg-elev);box-shadow:var(--shadow-card);
}
.vcard__img{width:100%;height:100%;object-fit:cover;transition:transform .45s ease}
.vcard:hover .vcard__img{transform:scale(1.04)}
.vcard__badge{
  position:absolute;left:14px;top:14px;z-index:3;
}
.vcard__time{
  position:absolute;right:14px;top:14px;z-index:3;
  font-family:var(--mono);font-size:12px;color:var(--ink-1);
  background:rgba(11,18,32,.68);border:1px solid var(--line);border-radius:999px;padding:3px 10px;
  backdrop-filter:blur(10px);
}
.vcard__play{
  position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);z-index:3;
  width:56px;height:56px;border-radius:50%;display:grid;place-items:center;
  background:rgba(31,209,178,.94);color:#04231E;font-size:17px;
  box-shadow:0 0 0 8px rgba(31,209,178,.18),0 10px 30px -10px rgba(31,209,178,.9);
  transition:transform .3s ease;
}
.vcard:hover .vcard__play{transform:translate(-50%,-50%) scale(1.08)}
.vcard__mask{
  position:absolute;left:0;right:0;bottom:0;height:52%;z-index:2;
  background:linear-gradient(180deg,transparent,rgba(6,11,20,.92));
}
.vcard__title{
  position:absolute;left:16px;right:16px;bottom:16px;z-index:3;
  font-size:15px;font-weight:600;line-height:1.5;color:var(--ink-1);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}

/* ---------- sections ---------- */
.section{padding:96px 0}
.section--tight{padding:72px 0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:36px}
.sec-title{font-size:clamp(24px,3.2vw,32px);font-weight:700;letter-spacing:-.01em;color:var(--ink-1);margin:0 0 8px}
.sec-note{font-size:15px;color:var(--ink-3);margin:0}
.more-link{font-size:14px;color:var(--ink-2);display:inline-flex;align-items:center;gap:8px;transition:color .2s ease,gap .2s ease}
.more-link:hover{color:var(--brand);gap:12px}

/* horizontal rails */
.rail{
  display:flex;gap:20px;overflow-x:auto;padding:6px 4px 18px;
  scroll-snap-type:x mandatory;-webkit-overflow-scrolling:touch;
}
.rail::-webkit-scrollbar{height:6px}
.rail::-webkit-scrollbar-track{background:rgba(255,255,255,.04);border-radius:999px}
.rail::-webkit-scrollbar-thumb{background:rgba(31,209,178,.4);border-radius:999px}
.clip{
  position:relative;flex:0 0 240px;aspect-ratio:9/16;border-radius:16px;overflow:hidden;
  scroll-snap-align:start;border:1px solid var(--line);background:var(--bg-elev);
  box-shadow:var(--shadow-card);transition:transform .3s ease,border-color .3s ease;
}
.clip:hover{transform:translateY(-4px);border-color:rgba(31,209,178,.45)}
.clip img{width:100%;height:100%;object-fit:cover;transition:transform .45s ease}
.clip:hover img{transform:scale(1.05)}
.clip__no{
  position:absolute;left:12px;top:12px;z-index:3;font-family:var(--mono);
  font-size:15px;font-weight:700;color:var(--accent);
  background:rgba(11,18,32,.7);border:1px solid rgba(255,178,77,.35);
  border-radius:8px;padding:1px 8px;
}
.clip__mask{position:absolute;inset:auto 0 0 0;height:58%;background:linear-gradient(180deg,transparent,rgba(6,11,20,.92))}
.clip__title{
  position:absolute;left:14px;right:14px;bottom:14px;z-index:3;
  font-size:14px;font-weight:600;line-height:1.5;color:var(--ink-1);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}

/* list rows */
.row-list{border-top:1px solid var(--line)}
.row-item{
  display:flex;align-items:flex-start;gap:26px;padding:26px 0;border-bottom:1px solid var(--line);
  transition:transform .25s ease;
}
.row-item:hover{transform:translateX(4px)}
.row-num{
  flex:0 0 44px;font-family:var(--mono);font-size:34px;font-weight:700;line-height:1.1;
  color:rgba(31,209,178,.32);transition:color .25s ease;
}
.row-item:hover .row-num{color:var(--brand)}
.row-body{min-width:0}
.row-title{font-size:19px;font-weight:650;color:var(--ink-1);margin:0 0 8px}
.row-desc{font-size:15px;color:var(--ink-2);margin:0 0 12px;max-width:820px}
.row-foot{display:flex;flex-wrap:wrap;align-items:center;gap:10px}
.meta{font-size:13px;color:var(--ink-3);font-family:var(--mono)}

/* quote rail */
.quote-card{
  flex:0 0 280px;padding:20px;border-radius:16px;scroll-snap-align:start;
  background:var(--glass);border:1px solid var(--line);
  backdrop-filter:blur(14px) saturate(140%);
  box-shadow:var(--shadow-card);
}
.quote-top{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.avatar{
  width:40px;height:40px;border-radius:50%;display:grid;place-items:center;flex:0 0 40px;
  background:linear-gradient(135deg,rgba(31,209,178,.92),rgba(77,141,255,.9));
  color:#04231E;font-weight:700;font-size:15px;
}
.quote-name{font-size:14px;font-weight:600;color:var(--ink-1)}
.quote-date{font-size:12px;color:var(--ink-3);font-family:var(--mono)}
.stars{color:var(--accent);font-size:13px;letter-spacing:2px;margin-bottom:10px}
.quote-text{font-size:15px;line-height:1.75;color:var(--ink-2);margin:0}

/* info cards */
.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}
.info-card{
  display:flex;flex-direction:column;border-radius:var(--r-lg);overflow:hidden;
  background:var(--glass);border:1px solid var(--line);
  backdrop-filter:blur(14px) saturate(140%);
  box-shadow:var(--shadow-card);
  transition:transform .28s ease,border-color .28s ease;
}
.info-card:hover{transform:translateY(-4px);border-color:rgba(31,209,178,.45)}
.info-card__cover{display:block;aspect-ratio:16/9;overflow:hidden;background:var(--bg-elev2)}
.info-card__cover img{width:100%;height:100%;object-fit:cover;transition:transform .45s ease}
.info-card:hover .info-card__cover img{transform:scale(1.05)}
.info-card__body{padding:20px;display:flex;flex-direction:column;gap:12px;flex:1}
.card-title{font-size:17px;font-weight:650;line-height:1.5;color:var(--ink-1);margin:0}
.card-title a:hover{color:var(--brand)}
.card-text{font-size:14.5px;line-height:1.75;color:var(--ink-2);margin:0}
.clamp2{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.clamp3{display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.card-foot{
  margin-top:auto;padding-top:14px;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:12px;
}
.card-arrow{
  width:32px;height:32px;border-radius:50%;display:grid;place-items:center;
  border:1px solid var(--line);color:var(--ink-2);font-size:12px;
  transition:border-color .2s ease,color .2s ease,transform .2s ease;
}
.card-arrow:hover{border-color:var(--brand);color:var(--brand);transform:translateX(3px)}
.empty-state{
  min-height:220px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;
  border:1px dashed var(--line);border-radius:var(--r-lg);background:var(--glass);
}
.empty-state i{font-size:26px;color:var(--ink-3)}
.empty-state p{margin:0;font-size:15px;color:var(--ink-3)}

/* faq */
.faq-wrap{max-width:900px}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item:first-child{border-top:1px solid var(--line)}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:flex-start;justify-content:space-between;gap:20px;
  padding:22px 0;font-size:18px;font-weight:600;color:var(--ink-1);transition:color .2s ease;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--brand)}
.faq-item summary::after{
  content:"+";font-size:22px;line-height:1;color:var(--brand);transition:transform .25s ease;flex:0 0 auto;
}
.faq-item[open] summary::after{transform:rotate(45deg)}
.faq-answer{max-width:800px;padding:0 0 24px;font-size:15px;line-height:1.85;color:var(--ink-2);margin:0}

/* cta */
.cta{
  position:relative;border-radius:26px;padding:64px 28px;text-align:center;overflow:hidden;
  background:var(--bg-elev);border:1px solid var(--line);box-shadow:var(--shadow-card);
}
.cta::before{
  content:"";position:absolute;left:50%;top:-140px;transform:translateX(-50%);
  width:640px;height:400px;border-radius:50%;
  background:radial-gradient(circle,rgba(31,209,178,.16),transparent 68%);
}
.cta > *{position:relative;z-index:2}
.cta-title{font-size:clamp(24px,3vw,34px);font-weight:750;color:var(--ink-1);margin:0 0 12px;letter-spacing:-.01em}
.cta-note{font-size:15.5px;color:var(--ink-2);max-width:620px;margin:0 auto 26px}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:center}

/* footer */
.site-footer{border-top:1px solid var(--line);background:rgba(16,26,43,.6);margin-top:20px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;padding:64px 0 40px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-desc{font-size:14px;color:var(--ink-3);margin:0 0 18px;max-width:320px}
.footer-title{font-size:14px;font-weight:600;color:var(--ink-1);margin:0 0 16px;letter-spacing:.02em}
.footer-links{display:flex;flex-direction:column;gap:11px}
.footer-links a{font-size:14px;color:var(--ink-2);transition:color .2s ease,transform .2s ease;display:inline-block}
.footer-links a:hover{color:var(--brand);transform:translateX(3px)}
.footer-tags{display:flex;flex-wrap:wrap;gap:8px}
.footer-bottom{
  border-top:1px solid var(--line);padding:20px 0 28px;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px;
  font-size:13px;color:var(--ink-3);
}
.footer-bottom a{color:var(--ink-3)}
.footer-bottom a:hover{color:var(--brand)}
.lang-switch{display:flex;align-items:center;gap:10px}
.lang-switch span{
  padding:3px 10px;border-radius:999px;border:1px solid var(--line);font-size:12px;
}
.lang-switch span.on{border-color:rgba(31,209,178,.5);color:var(--brand)}

/* drawer */
.drawer{
  position:fixed;inset:0;z-index:60;display:flex;flex-direction:column;padding:22px;
  background:rgba(9,15,26,.98);backdrop-filter:blur(16px);
  transform:translateY(-100%);transition:transform .35s ease;visibility:hidden;
}
.drawer.is-open{transform:translateY(0);visibility:visible}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:22px}
.drawer-close{
  width:42px;height:42px;border-radius:12px;display:grid;place-items:center;
  background:var(--glass);border:1px solid var(--line);color:var(--ink-1);font-size:16px;cursor:pointer;
}
.drawer-nav{display:flex;flex-direction:column}
.drawer-nav a{
  height:48px;display:flex;align-items:center;font-size:16px;color:var(--ink-2);
  border-bottom:1px solid var(--line);
}
.drawer-nav a.is-active{color:var(--brand);font-weight:600}
.drawer-search{
  display:flex;align-items:center;gap:10px;margin:22px 0 0;height:46px;padding:0 14px;
  border-radius:14px;background:rgba(255,255,255,.05);border:1px solid var(--line);
}
.drawer-search input{flex:1;background:transparent;border:0;outline:none;color:var(--ink-1);font-size:15px}
.drawer-foot{margin-top:auto;padding-top:22px}
.drawer-foot .btn{width:100%}

/* breakpoints */
@media (max-width:1024px){
  .hero-grid{grid-template-columns:minmax(0,1fr);gap:44px}
  .hero-visual{justify-content:flex-start}
  .nav-menu,.cmd-search,.nav-right .icon-btn{display:none}
  .nav-toggle{display:grid}
  .nav{gap:16px}
  .grid-3{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px}
  .section{padding:76px 0}
}
@media (max-width:768px){
  .section{padding:64px 0}
  .hero{padding:52px 0 68px}
  .section-head{flex-direction:column;align-items:flex-start;gap:12px}
  .grid-3{grid-template-columns:minmax(0,1fr)}
  .clip{flex:0 0 76vw}
  .quote-card{flex:0 0 86vw}
  .row-item{gap:16px}
  .row-num{flex:0 0 34px;font-size:26px}
  .cta{padding:48px 20px;border-radius:20px}
}
@media (max-width:520px){
  .container{padding:0 16px}
  .brand-word{font-size:15px}
  .hero-actions .btn{width:100%}
  .hero-stats{gap:10px}
  .stat-pill{font-size:12px;padding:8px 12px}
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:28px;padding:48px 0 32px}
  .row-title{font-size:17px}
}

/* roulang page: category1 */
:root{
  --bg-base:#0B1220;
  --bg-elev:#101A2B;
  --bg-elev2:#16233A;
  --brand:#1FD1B2;
  --brand-2:#4D8DFF;
  --accent:#FFB24D;
  --hot:#FF4D6D;
  --ink-1:#EEF3FA;
  --ink-2:#B7C4D6;
  --ink-3:#7C8CA3;
  --line:rgba(255,255,255,.08);
  --glass:rgba(255,255,255,.045);
  --radius-card:18px;
  --radius-sm:14px;
  --shadow-card:0 18px 40px -24px rgba(0,0,0,.8);
  --font: -apple-system, "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", sans-serif;
}

*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.8;
  color:var(--ink-2);
  background:
    radial-gradient(1200px 620px at 10% -10%, rgba(31,209,178,.06), transparent 62%),
    radial-gradient(900px 520px at 94% 2%, rgba(77,141,255,.05), transparent 64%),
    var(--bg-base);
  min-height:100vh;
  overflow-x:hidden;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button{font-family:inherit;}
h1,h2,h3,h4{margin:0;color:var(--ink-1);letter-spacing:-.01em;}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}

.container{width:100%;max-width:1240px;margin:0 auto;padding:0 24px;}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0;}

/* ---------- 通用组件 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-size:15px;font-weight:600;line-height:1;
  padding:13px 24px;border-radius:999px;border:1px solid transparent;
  cursor:pointer;transition:transform .2s ease, box-shadow .25s ease, background .25s ease, border-color .25s ease, filter .2s ease;
  white-space:nowrap;
}
.btn-primary{
  background:linear-gradient(120deg,var(--brand) 0%, var(--brand) 62%, var(--brand-2) 100%);
  color:#04231E;
  box-shadow:0 0 0 1px rgba(31,209,178,.5), 0 8px 28px -8px rgba(31,209,178,.55);
}
.btn-primary:hover{transform:translateY(-1px);filter:brightness(1.08);box-shadow:0 0 0 1px rgba(31,209,178,.6), 0 12px 38px -8px rgba(31,209,178,.7);}
.btn-primary:active{transform:translateY(1px);}
.btn-ghost{
  background:var(--glass);color:var(--ink-1);border-color:var(--line);
  backdrop-filter:blur(10px);
}
.btn-ghost:hover{border-color:rgba(31,209,178,.6);color:#fff;transform:translateY(-1px);}
.btn-sm{padding:10px 18px;font-size:14px;}
.btn:focus-visible,a:focus-visible,button:focus-visible,input:focus-visible{
  outline:none;box-shadow:0 0 0 3px rgba(31,209,178,.22);
}
.btn[disabled],.is-disabled{opacity:.45;cursor:not-allowed;}

.badge{
  display:inline-flex;align-items:center;gap:6px;
  height:26px;padding:0 11px;border-radius:999px;
  font-size:12.5px;font-weight:600;letter-spacing:.01em;
  background:var(--glass);border:1px solid var(--line);color:var(--ink-2);
  white-space:nowrap;
}
.badge--brand{border-color:rgba(31,209,178,.45);color:#8DF2E0;background:rgba(31,209,178,.09);}
.badge--accent{border-color:rgba(255,178,77,.4);color:#FFD39B;background:rgba(255,178,77,.09);}
.badge--hot{border-color:rgba(255,77,109,.4);color:#FFA6B6;background:rgba(255,77,109,.1);}

.section{padding:88px 0;}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:36px;flex-wrap:wrap;}
.section-title{font-size:clamp(22px,2.4vw,30px);font-weight:700;line-height:1.25;}
.section-desc{margin-top:10px;font-size:15px;color:var(--ink-3);max-width:760px;}
.link-more{font-size:14.5px;font-weight:600;color:var(--brand);display:inline-flex;align-items:center;gap:7px;transition:gap .2s ease;}
.link-more:hover{gap:12px;}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:12.5px;font-weight:700;letter-spacing:.14em;color:var(--brand);text-transform:uppercase;}
.eyebrow::before{content:"";width:22px;height:2px;border-radius:2px;background:var(--brand);display:block;}

/* ---------- 头部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(11,18,32,.82);
  border-bottom:1px solid transparent;
  transition:background .3s ease,border-color .3s ease,box-shadow .3s ease;
}
.site-header.is-scrolled{
  background:rgba(11,18,32,.9);
  backdrop-filter:blur(16px) saturate(150%);
  border-bottom-color:var(--line);
  box-shadow:0 14px 40px -28px rgba(0,0,0,.95);
}
.nav{display:flex;align-items:center;gap:28px;height:68px;}
.brand{display:inline-flex;align-items:center;gap:11px;flex-shrink:0;}
.brand-mark{
  width:32px;height:32px;border-radius:10px;
  display:inline-flex;align-items:center;justify-content:center;
  font-size:15px;font-weight:800;color:#04231E;
  background:linear-gradient(135deg,var(--brand),var(--brand-2));
  box-shadow:0 0 0 1px rgba(31,209,178,.5), 0 6px 20px -6px rgba(31,209,178,.7);
}
.brand-word{font-size:16px;font-weight:700;color:var(--ink-1);letter-spacing:.01em;}
.nav-menu{display:flex;align-items:center;gap:28px;}
.nav-link{
  position:relative;font-size:14.5px;font-weight:500;color:var(--ink-2);
  padding:6px 0;transition:color .22s ease;
}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;border-radius:2px;
  background:var(--brand);transform:scaleX(0);transform-origin:left;transition:transform .25s ease;
}
.nav-link:hover{color:var(--ink-1);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.is-active{color:#fff;}
.nav-link.is-active::after{transform:scaleX(1);}
.nav-right{display:flex;align-items:center;gap:14px;margin-left:auto;}
.cmd-search{
  display:flex;align-items:center;gap:9px;
  width:260px;height:40px;padding:0 12px;border-radius:12px;
  background:rgba(255,255,255,.05);border:1px solid var(--line);
  transition:border-color .22s ease, box-shadow .22s ease, background .22s ease;
}
.cmd-search:focus-within{border-color:rgba(31,209,178,.7);box-shadow:0 0 0 3px rgba(31,209,178,.18);background:rgba(255,255,255,.07);}
.cmd-search i{color:var(--ink-3);font-size:13px;}
.cmd-search input{
  flex:1;min-width:0;background:none;border:0;outline:none;
  color:var(--ink-1);font-size:13.5px;font-family:inherit;
}
.cmd-search input::placeholder{color:var(--ink-3);}
.kbd{
  font-size:11px;font-weight:700;color:var(--ink-3);
  border:1px solid var(--line);border-radius:6px;padding:2px 6px;line-height:1.2;
  background:rgba(255,255,255,.04);
}
.icon-btn{
  width:40px;height:40px;border-radius:12px;
  display:inline-flex;align-items:center;justify-content:center;
  background:var(--glass);border:1px solid var(--line);color:var(--ink-2);
  transition:color .22s ease,border-color .22s ease,transform .2s ease;
}
.icon-btn:hover{color:var(--brand);border-color:rgba(31,209,178,.5);transform:translateY(-1px);}
.nav-toggle{
  display:none;width:40px;height:40px;border-radius:12px;
  background:var(--glass);border:1px solid var(--line);color:var(--ink-1);
  font-size:16px;cursor:pointer;align-items:center;justify-content:center;
}
.drawer-cta{display:none;}

/* ---------- Hero ---------- */
.hero{
  position:relative;overflow:hidden;
  padding:56px 0 72px;
  background-image:linear-gradient(180deg, rgba(11,18,32,.9) 0%, rgba(11,18,32,.95) 62%, rgba(11,18,32,.99) 100%), url('/assets/images/backpic/back-1.webp');
  background-size:cover;background-position:center;
}
.hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.028) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.028) 1px,transparent 1px);
  background-size:64px 64px;
  mask-image:radial-gradient(80% 70% at 50% 30%, #000 20%, transparent 100%);
}
.hero .container{position:relative;z-index:2;}
.breadcrumb{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--ink-3);margin-bottom:24px;flex-wrap:wrap;}
.breadcrumb a{color:var(--ink-3);transition:color .2s ease;}
.breadcrumb a:hover{color:var(--brand);}
.breadcrumb .sep{opacity:.5;}
.breadcrumb .current{color:var(--ink-2);}
.hero h1{
  font-size:clamp(26px,3.2vw,40px);font-weight:750;line-height:1.2;letter-spacing:-.02em;
  max-width:900px;
}
.hero h1 .hl{color:var(--brand);}
.hero-lead{margin-top:18px;font-size:16px;line-height:1.85;color:var(--ink-2);max-width:720px;}
.hero-meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px;}
.hero-stats{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px;}
.stat{
  display:flex;flex-direction:column;gap:2px;
  padding:14px 20px;border-radius:var(--radius-sm);
  background:var(--glass);border:1px solid var(--line);backdrop-filter:blur(12px);
}
.stat b{font-size:19px;font-weight:750;color:var(--ink-1);font-variant-numeric:tabular-nums;}
.stat span{font-size:12.5px;color:var(--ink-3);}

.filters{display:flex;flex-wrap:wrap;gap:10px;margin-top:34px;}
.chip{
  display:inline-flex;align-items:center;gap:7px;
  height:36px;padding:0 16px;border-radius:999px;
  font-size:13.5px;font-weight:600;color:var(--ink-2);
  background:var(--glass);border:1px solid var(--line);
  transition:all .22s ease;cursor:pointer;
}
.chip:hover{color:#fff;border-color:rgba(31,209,178,.5);transform:translateY(-1px);}
.chip.is-active{
  color:#04231E;background:linear-gradient(120deg,var(--brand),var(--brand-2));
  border-color:transparent;box-shadow:0 0 0 1px rgba(31,209,178,.4), 0 8px 24px -10px rgba(31,209,178,.8);
}

/* ---------- 卡片与列表 ---------- */
.card{
  display:flex;flex-direction:column;
  background:var(--glass);border:1px solid var(--line);border-radius:var(--radius-card);
  overflow:hidden;backdrop-filter:blur(14px) saturate(140%);
  box-shadow:var(--shadow-card), inset 0 1px 0 rgba(255,255,255,.05);
  transition:transform .25s ease, border-color .25s ease, box-shadow .3s ease;
}
.card:hover{transform:translateY(-4px);border-color:rgba(31,209,178,.35);box-shadow:0 26px 52px -28px rgba(0,0,0,.9), inset 0 1px 0 rgba(255,255,255,.08);}
.card-media{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--bg-elev2);}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease;}
.card:hover .card-media img{transform:scale(1.04);}
.card-corner{
  position:absolute;top:12px;left:12px;
  display:inline-flex;align-items:center;height:24px;padding:0 10px;
  border-radius:999px;font-size:12px;font-weight:700;
  background:rgba(11,18,32,.72);border:1px solid rgba(255,178,77,.5);color:#FFD39B;
  backdrop-filter:blur(8px);
}
.card-body{padding:22px;display:flex;flex-direction:column;gap:12px;flex:1;}
.card-title{font-size:19px;font-weight:650;line-height:1.45;color:var(--ink-1);}
.card-text{font-size:14.5px;line-height:1.75;color:var(--ink-2);display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;}
.card-meta{
  margin-top:auto;display:flex;align-items:center;justify-content:space-between;
  font-size:13px;color:var(--ink-3);padding-top:6px;
}
.card-meta i{color:var(--brand);transition:transform .25s ease;}
.card:hover .card-meta i{transform:translateX(4px);}

.feature{
  display:grid;grid-template-columns:1.1fr 1fr;
  border-radius:var(--radius-card);overflow:hidden;
  background:var(--glass);border:1px solid var(--line);
  backdrop-filter:blur(14px) saturate(140%);
  box-shadow:var(--shadow-card), inset 0 1px 0 rgba(255,255,255,.05);
}
.feature-media{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--bg-elev2);}
.feature-media img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease;}
.feature:hover .feature-media img{transform:scale(1.03);}
.feature-body{padding:36px 34px;display:flex;flex-direction:column;gap:14px;justify-content:center;}
.feature-body h3{font-size:clamp(20px,2.2vw,26px);font-weight:700;line-height:1.35;}
.feature-body p{font-size:15px;line-height:1.8;color:var(--ink-2);}
.feature-foot{display:flex;align-items:center;gap:16px;flex-wrap:wrap;font-size:13px;color:var(--ink-3);margin-top:6px;}

.snap-wrap{position:relative;}
.snap-row{
  display:flex;gap:20px;overflow-x:auto;padding:4px 0 18px;
  scroll-snap-type:x mandatory;-webkit-overflow-scrolling:touch;
  scrollbar-width:thin;scrollbar-color:rgba(31,209,178,.4) transparent;
}
.snap-row::-webkit-scrollbar{height:6px;}
.snap-row::-webkit-scrollbar-thumb{background:rgba(31,209,178,.35);border-radius:99px;}
.snap-row::-webkit-scrollbar-track{background:rgba(255,255,255,.04);border-radius:99px;}
.snap-card{
  flex:0 0 240px;scroll-snap-align:start;
  border-radius:var(--radius-sm);overflow:hidden;
  background:var(--glass);border:1px solid var(--line);
  box-shadow:var(--shadow-card);
  transition:transform .25s ease,border-color .25s ease;
}
.snap-card:hover{transform:translateY(-4px);border-color:rgba(31,209,178,.35);}
.snap-media{position:relative;aspect-ratio:3/4;overflow:hidden;background:var(--bg-elev2);}
.snap-media img{width:100%;height:100%;object-fit:cover;}
.snap-media::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 40%,rgba(11,18,32,.88) 100%);}
.snap-no{
  position:absolute;top:12px;left:12px;z-index:2;
  font-size:15px;font-weight:800;letter-spacing:.06em;
  color:#FFD39B;font-variant-numeric:tabular-nums;
}
.snap-title{
  position:absolute;left:12px;right:12px;bottom:12px;z-index:2;
  font-size:14px;font-weight:600;line-height:1.45;color:#fff;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}

.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;}

.scene{
  padding:26px;border-radius:var(--radius-card);
  background:linear-gradient(180deg, rgba(255,255,255,.05), rgba(255,255,255,.02));
  border:1px solid var(--line);
  display:flex;flex-direction:column;gap:12px;
  transition:border-color .25s ease, transform .25s ease;
}
.scene:hover{border-color:rgba(31,209,178,.35);transform:translateY(-3px);}
.scene-icon{
  width:44px;height:44px;border-radius:13px;
  display:flex;align-items:center;justify-content:center;
  color:var(--brand);font-size:17px;
  background:rgba(31,209,178,.1);border:1px solid rgba(31,209,178,.32);
}
.scene h3{font-size:17px;font-weight:650;}
.scene p{font-size:14px;line-height:1.75;color:var(--ink-2);}

.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;counter-reset:step;}
.step{
  position:relative;padding:28px 24px 24px;border-radius:var(--radius-card);
  background:var(--bg-elev);border:1px solid var(--line);
  box-shadow:var(--shadow-card);
}
.step::before{
  counter-increment:step;content:"0" counter(step);
  display:block;font-size:15px;font-weight:800;letter-spacing:.1em;
  color:var(--brand);font-variant-numeric:tabular-nums;margin-bottom:14px;
}
.step h3{font-size:17px;font-weight:650;margin-bottom:10px;}
.step p{font-size:14px;line-height:1.75;color:var(--ink-2);}
.step-line{
  position:absolute;top:44px;right:-10px;width:20px;height:1px;background:linear-gradient(90deg,rgba(31,209,178,.5),transparent);
}
.step:last-child .step-line{display:none;}

.notice{
  display:flex;gap:16px;align-items:flex-start;
  padding:22px 24px;border-radius:var(--radius-sm);
  background:rgba(31,209,178,.06);border:1px solid rgba(31,209,178,.25);
  margin-top:32px;
}
.notice i{color:var(--brand);font-size:17px;margin-top:5px;}
.notice p{font-size:14.5px;line-height:1.8;color:var(--ink-2);}

/* ---------- 分页 ---------- */
.pager{display:flex;align-items:center;justify-content:center;gap:10px;margin-top:44px;}
.pager span{
  min-width:38px;height:38px;padding:0 14px;border-radius:11px;
  display:inline-flex;align-items:center;justify-content:center;
  font-size:13.5px;font-weight:600;color:var(--ink-2);
  background:var(--glass);border:1px solid var(--line);
}
.pager .is-active{
  color:#04231E;background:linear-gradient(120deg,var(--brand),var(--brand-2));
  border-color:transparent;
}
.pager .is-disabled{opacity:.42;}

/* ---------- FAQ ---------- */
.faq{max-width:800px;border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:22px 0;background:none;border:0;cursor:pointer;
  font-size:18px;font-weight:600;color:var(--ink-1);text-align:left;
  transition:color .22s ease;
}
.faq-q:hover{color:var(--brand);}
.faq-q i{color:var(--brand);font-size:15px;transition:transform .28s ease;flex-shrink:0;}
.faq-item.is-open .faq-q i{transform:rotate(45deg);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .32s ease;}
.faq-a p{font-size:15px;line-height:1.8;color:var(--ink-2);padding:0 0 22px;max-width:800px;}
.faq-item.is-open .faq-a{max-height:360px;}

/* ---------- CTA ---------- */
.cta{
  position:relative;overflow:hidden;text-align:center;
  padding:72px 32px;border-radius:24px;
  background:linear-gradient(180deg, rgba(255,255,255,.05), rgba(255,255,255,.015));
  border:1px solid var(--line);
}
.cta::before{
  content:"";position:absolute;width:560px;height:560px;left:50%;top:-260px;transform:translateX(-50%);
  background:radial-gradient(circle, rgba(31,209,178,.16), transparent 65%);
  pointer-events:none;
}
.cta .inner{position:relative;z-index:2;display:flex;flex-direction:column;align-items:center;gap:18px;}
.cta h2{font-size:clamp(22px,2.6vw,32px);font-weight:750;line-height:1.3;max-width:720px;}
.cta p{font-size:15.5px;line-height:1.8;color:var(--ink-2);max-width:660px;}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;justify-content:center;margin-top:8px;}

/* ---------- 页脚 ---------- */
.site-footer{
  margin-top:24px;border-top:1px solid var(--line);
  background:linear-gradient(180deg, rgba(16,26,43,.6), rgba(11,18,32,.95));
  padding:64px 0 28px;
}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:36px;}
.footer-brand{display:flex;align-items:center;gap:11px;margin-bottom:16px;}
.footer-desc{font-size:14px;line-height:1.85;color:var(--ink-3);max-width:320px;}
.footer-tags{display:flex;gap:8px;flex-wrap:wrap;margin-top:18px;}
.footer-title{font-size:14px;font-weight:700;color:var(--ink-1);margin-bottom:16px;letter-spacing:.02em;}
.footer-links{display:flex;flex-direction:column;gap:11px;}
.footer-links a{font-size:14px;color:var(--ink-3);transition:color .2s ease,transform .2s ease;display:inline-block;}
.footer-links a:hover{color:var(--brand);transform:translateX(3px);}
.footer-bottom{
  margin-top:44px;padding-top:22px;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:18px;flex-wrap:wrap;
  font-size:13px;color:var(--ink-3);
}
.lang-switch{display:flex;gap:6px;}
.lang-switch span{
  padding:5px 12px;border-radius:8px;border:1px solid var(--line);
  font-size:12.5px;color:var(--ink-3);
}
.lang-switch .on{color:#04231E;background:var(--brand);border-color:transparent;font-weight:700;}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .grid-4{grid-template-columns:repeat(2,1fr);}
}
@media (max-width:1024px){
  .nav-menu{
    position:fixed;left:0;right:0;top:68px;bottom:0;
    flex-direction:column;align-items:stretch;gap:0;
    padding:12px 24px 32px;
    background:rgba(11,18,32,.97);backdrop-filter:blur(18px);
    border-top:1px solid var(--line);
    transform:translateY(-12px);opacity:0;pointer-events:none;
    transition:opacity .25s ease, transform .25s ease;
    overflow-y:auto;
  }
  .site-header.nav-open .nav-menu{transform:translateY(0);opacity:1;pointer-events:auto;}
  .nav-link{height:48px;display:flex;align-items:center;border-bottom:1px solid var(--line);font-size:16px;}
  .nav-link::after{display:none;}
  .nav-link.is-active{color:var(--brand);}
  .drawer-cta{
    display:inline-flex;margin-top:auto;position:sticky;bottom:0;
    width:100%;justify-content:center;margin-top:24px;
  }
  .cmd-search{display:none;}
  .nav-toggle{display:inline-flex;align-items:center;justify-content:center;}
  .nav-right .btn-primary{display:none;}
  .icon-btn{display:none;}
  .feature{grid-template-columns:1fr;}
  .feature-body{padding:28px 24px;}
  .grid-3{grid-template-columns:repeat(2,1fr);}
  .steps{grid-template-columns:repeat(2,1fr);}
  .step-line{display:none;}
  .footer-grid{grid-template-columns:1fr 1fr;}
}
@media (max-width:768px){
  .container{padding:0 18px;}
  .section{padding:56px 0;}
  .hero{padding:40px 0 54px;}
  .grid-2,.grid-3,.grid-4{grid-template-columns:1fr;}
  .steps{grid-template-columns:1fr;}
  .snap-card{flex:0 0 76vw;}
  .snap-row{gap:14px;}
  .cta{padding:52px 20px;border-radius:20px;}
  .footer-grid{grid-template-columns:1fr;gap:30px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .section-head{margin-bottom:26px;}
  .hero-stats{gap:10px;}
  .stat{padding:12px 16px;flex:1 1 40%;}
}
@media (max-width:520px){
  .brand-word{font-size:14.5px;}
  .card-body{padding:18px;}
  .hero h1{font-size:26px;}
  .feature-body h3{font-size:20px;}
  .faq-q{font-size:16px;}
}

/* roulang page: article */
:root{
  --bg-base:#0B1220;
  --bg-elev:#101A2B;
  --bg-elev2:#16233A;
  --brand:#1FD1B2;
  --brand-2:#4D8DFF;
  --accent:#FFB24D;
  --hot:#FF4D6D;
  --ink-1:#EEF3FA;
  --ink-2:#B7C4D6;
  --ink-3:#7C8CA3;
  --line:rgba(255,255,255,.08);
  --glass:rgba(255,255,255,.045);
  --r-card:18px;
  --r-sm:14px;
  --r-pill:999px;
  --shadow-card:0 18px 40px -24px rgba(0,0,0,.8);
  --shadow-cta:0 0 0 1px rgba(31,209,178,.5), 0 8px 28px -8px rgba(31,209,178,.55);
  --ease:cubic-bezier(.22,.61,.36,1);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--ink-2);
  background-color:var(--bg-base);
  background-image:
    radial-gradient(900px 520px at 12% -6%, rgba(31,209,178,.06), transparent 62%),
    radial-gradient(760px 460px at 88% 4%, rgba(77,141,255,.05), transparent 60%),
    linear-gradient(rgba(255,255,255,.016) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.016) 1px, transparent 1px);
  background-size:auto, auto, 100% 32px, 32px 100%;
  background-repeat:no-repeat, no-repeat, repeat, repeat;
  background-attachment:fixed, fixed, scroll, scroll;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button,input{font:inherit;color:inherit;}
h1,h2,h3,h4{margin:0;color:var(--ink-1);font-weight:700;line-height:1.3;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0;}
.container{width:100%;max-width:1240px;margin:0 auto;padding:0 24px;}

/* 导航 */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(11,18,32,.72);
  border-bottom:1px solid transparent;
  transition:background .3s var(--ease), border-color .3s var(--ease), backdrop-filter .3s var(--ease);
}
.site-header.is-scrolled{
  background:rgba(11,18,32,.88);
  backdrop-filter:blur(14px) saturate(140%);
  border-bottom-color:var(--line);
}
.nav{display:flex;align-items:center;gap:28px;height:68px;}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.brand-mark{
  width:30px;height:30px;border-radius:9px;
  display:grid;place-items:center;
  font-size:14px;font-weight:800;color:#04231E;
  background:linear-gradient(135deg,var(--brand),var(--brand-2));
  box-shadow:0 0 0 1px rgba(31,209,178,.45), 0 6px 18px -6px rgba(31,209,178,.6);
}
.brand-word{font-size:16px;font-weight:750;color:var(--ink-1);letter-spacing:-.01em;white-space:nowrap;}
.nav-menu{display:flex;align-items:center;gap:28px;margin-right:auto;}
.nav-link{
  position:relative;font-size:14.5px;font-weight:500;color:var(--ink-2);
  padding:6px 0;transition:color .22s var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--brand),var(--brand-2));
  transform:scaleX(0);transform-origin:left;transition:transform .25s var(--ease);
}
.nav-link:hover{color:var(--ink-1);}
.nav-link:hover::after,.nav-link.is-active::after{transform:scaleX(1);}
.nav-link.is-active{color:var(--ink-1);font-weight:600;}
.nav-right{display:flex;align-items:center;gap:14px;}
.cmd-search{
  display:flex;align-items:center;gap:9px;
  width:258px;height:40px;padding:0 12px;
  background:rgba(255,255,255,.05);
  border:1px solid var(--line);border-radius:var(--r-sm);
  transition:border-color .22s var(--ease), box-shadow .22s var(--ease);
}
.cmd-search i{color:var(--ink-3);font-size:13px;}
.cmd-search input{
  flex:1;min-width:0;border:0;outline:0;background:transparent;
  font-size:14px;color:var(--ink-1);
}
.cmd-search input::placeholder{color:var(--ink-3);}
.cmd-search:focus-within{border-color:rgba(31,209,178,.75);box-shadow:0 0 0 3px rgba(31,209,178,.16);}
.kbd{
  font-size:11px;color:var(--ink-3);padding:2px 6px;border-radius:6px;
  border:1px solid var(--line);background:rgba(255,255,255,.04);
  font-family:ui-monospace,SFMono-Regular,Menlo,monospace;
}
.icon-btn{
  width:40px;height:40px;border-radius:12px;display:grid;place-items:center;
  color:var(--ink-2);border:1px solid var(--line);background:var(--glass);
  transition:.24s var(--ease);
}
.icon-btn:hover{color:var(--brand);border-color:rgba(31,209,178,.55);transform:translateY(-1px);}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;border-radius:var(--r-pill);
  font-size:15px;font-weight:600;letter-spacing:.01em;
  border:1px solid transparent;cursor:pointer;
  transition:transform .2s var(--ease), box-shadow .24s var(--ease), background .24s var(--ease), border-color .24s var(--ease), filter .24s var(--ease);
}
.btn-primary{
  color:#04231E;
  background:linear-gradient(120deg,var(--brand) 0%, var(--brand) 62%, var(--brand-2) 100%);
  box-shadow:var(--shadow-cta);
}
.btn-primary:hover{transform:translateY(-1px);filter:brightness(1.08);box-shadow:0 0 0 1px rgba(31,209,178,.6), 0 12px 34px -8px rgba(31,209,178,.7);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{
  color:var(--ink-1);background:var(--glass);
  border-color:var(--line);backdrop-filter:blur(14px) saturate(140%);
}
.btn-ghost:hover{border-color:rgba(31,209,178,.6);color:#fff;}
.btn-sm{padding:9px 18px;font-size:14px;}
.btn[disabled],.btn.is-disabled{opacity:.45;pointer-events:none;}
a:focus-visible,button:focus-visible,input:focus-visible{outline:0;box-shadow:0 0 0 3px rgba(31,209,178,.22);border-radius:8px;}
.nav-toggle{
  display:none;width:42px;height:42px;border-radius:12px;
  background:var(--glass);border:1px solid var(--line);color:var(--ink-1);cursor:pointer;
}

/* 面包屑 */
.crumb{margin:26px 0 0;font-size:13px;color:var(--ink-3);display:flex;flex-wrap:wrap;align-items:center;gap:8px;}
.crumb a{color:var(--ink-3);transition:color .2s var(--ease);}
.crumb a:hover{color:var(--brand);}
.crumb .sep{opacity:.5;}
.crumb .cur{color:var(--ink-2);}

/* 文章头 */
.page-head{
  position:relative;overflow:hidden;
  margin-top:18px;padding:44px 40px 40px;
  border:1px solid var(--line);border-radius:var(--r-card);
  background:linear-gradient(180deg,rgba(16,26,43,.92),rgba(11,18,32,.92)), url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
  box-shadow:var(--shadow-card);
}
.page-head::after{
  content:"";position:absolute;inset:0;
  background:radial-gradient(620px 300px at 18% 0%, rgba(31,209,178,.10), transparent 68%);
  pointer-events:none;
}
.page-head > *{position:relative;z-index:1;}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  height:26px;padding:0 12px;border-radius:var(--r-pill);
  font-size:12.5px;font-weight:600;letter-spacing:.02em;
  background:var(--glass);border:1px solid var(--line);color:var(--ink-2);
}
.badge--brand{border-color:rgba(31,209,178,.5);color:var(--brand);}
.badge--accent{border-color:rgba(255,178,77,.5);color:var(--accent);}
.badge--hot{border-color:rgba(255,77,109,.5);color:var(--hot);}
.page-head h1{
  margin:18px 0 16px;
  font-size:clamp(26px,3.2vw,40px);line-height:1.2;font-weight:750;letter-spacing:-.02em;
}
.meta-row{display:flex;flex-wrap:wrap;gap:18px;font-size:13px;color:var(--ink-3);}
.meta-row span{display:inline-flex;align-items:center;gap:7px;}

/* 布局 */
.layout{
  display:grid;grid-template-columns:minmax(0,760px) 300px;
  gap:56px;align-items:start;
  padding:56px 0 88px;
}
.card{
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  box-shadow:var(--shadow-card);
  backdrop-filter:blur(14px) saturate(140%);
}

/* 正文排版 */
.article-body{
  font-size:16.5px;line-height:1.85;color:var(--ink-2);
  word-break:break-word;
}
.article-body > *:first-child{margin-top:0;}
.article-body p{margin:0 0 1.5em;}
.article-body h2{
  margin:40px 0 16px;font-size:clamp(22px,2.4vw,28px);font-weight:700;color:var(--ink-1);
  padding-left:14px;border-left:3px solid var(--brand);
}
.article-body h3{margin:28px 0 12px;font-size:19px;font-weight:650;color:var(--ink-1);}
.article-body h4{margin:22px 0 10px;font-size:17px;font-weight:600;color:var(--ink-1);}
.article-body ul,.article-body ol{margin:0 0 1.5em 1.1em;padding:0;}
.article-body ul li{list-style:disc;margin:6px 0;}
.article-body ol li{list-style:decimal;margin:6px 0;}
.article-body li::marker{color:var(--brand);}
.article-body blockquote{
  margin:24px 0;padding:16px 20px;
  border-left:3px solid var(--brand);
  background:rgba(31,209,178,.055);
  border-radius:0 var(--r-sm) var(--r-sm) 0;
  color:var(--ink-1);
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body a{color:var(--brand);border-bottom:1px solid rgba(31,209,178,.35);}
.article-body a:hover{border-bottom-color:var(--brand);}
.article-body img{border-radius:var(--r-sm);margin:24px 0 8px;}
.article-body figure{margin:24px 0;}
.article-body figcaption{font-size:13px;color:var(--ink-3);text-align:center;}
.article-body hr{border:0;border-top:1px solid var(--line);margin:36px 0;}
.article-body code{
  font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:14px;
  background:rgba(255,255,255,.06);border:1px solid var(--line);
  padding:1px 6px;border-radius:6px;color:var(--ink-1);
}
.article-body table{width:100%;border-collapse:collapse;margin:24px 0;font-size:15px;}
.article-body th,.article-body td{border:1px solid var(--line);padding:10px 12px;text-align:left;}
.article-body th{background:rgba(255,255,255,.045);color:var(--ink-1);}

/* 侧栏 */
.side{display:flex;flex-direction:column;gap:20px;position:sticky;top:92px;}
.side-card{padding:22px;border-radius:var(--r-card);background:var(--glass);border:1px solid var(--line);}
.side-title{font-size:15px;font-weight:700;color:var(--ink-1);margin-bottom:14px;display:flex;align-items:center;gap:8px;}
.side-title i{color:var(--brand);font-size:13px;}
.toc{display:flex;flex-direction:column;gap:2px;}
.toc a{
  font-size:14px;color:var(--ink-2);padding:7px 10px;border-radius:10px;
  transition:.2s var(--ease);
}
.toc a:hover{color:var(--brand);background:rgba(31,209,178,.08);transform:translateX(3px);}
.side-list{display:flex;flex-direction:column;gap:10px;}
.side-list a{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  font-size:14px;color:var(--ink-2);padding:10px 12px;border-radius:12px;
  border:1px solid var(--line);background:rgba(255,255,255,.025);
  transition:.22s var(--ease);
}
.side-list a:hover{border-color:rgba(31,209,178,.5);color:var(--ink-1);transform:translateX(3px);}
.side-list i{color:var(--ink-3);font-size:12px;}
.side-note{font-size:13px;color:var(--ink-3);line-height:1.75;}

/* 文末模块 */
.tail{margin-top:48px;display:flex;flex-direction:column;gap:36px;}
.tag-row{display:flex;flex-wrap:wrap;gap:10px;align-items:center;}
.tag-row .label{font-size:13px;color:var(--ink-3);margin-right:4px;}
.nav-cards{display:grid;grid-template-columns:1fr 1fr;gap:20px;}
.nav-card{
  padding:20px;border-radius:var(--r-card);border:1px solid var(--line);
  background:var(--glass);transition:.24s var(--ease);
}
.nav-card:hover{border-color:rgba(31,209,178,.5);transform:translateY(-2px);}
.nav-card .k{font-size:12.5px;color:var(--ink-3);display:flex;align-items:center;gap:7px;}
.nav-card .t{font-size:15.5px;font-weight:600;color:var(--ink-1);margin-top:10px;line-height:1.5;}
.nav-card.is-disabled{opacity:.45;}
.nav-card.is-disabled .t{color:var(--ink-3);font-weight:500;}
.sec-title{display:flex;align-items:baseline;justify-content:space-between;gap:16px;margin-bottom:20px;}
.sec-title h2{font-size:22px;font-weight:700;}
.sec-title a{font-size:13.5px;color:var(--ink-3);transition:color .2s var(--ease);}
.sec-title a:hover{color:var(--brand);}
.rec-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.rec-card{
  border-radius:var(--r-card);border:1px solid var(--line);background:var(--glass);
  overflow:hidden;transition:.26s var(--ease);box-shadow:var(--shadow-card);
}
.rec-card:hover{transform:translateY(-3px);border-color:rgba(31,209,178,.45);}
.rec-card .thumb{aspect-ratio:16/9;position:relative;overflow:hidden;background:var(--bg-elev2);}
.rec-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease);}
.rec-card:hover .thumb img{transform:scale(1.05);}
.rec-card .body{padding:16px 18px 18px;}
.rec-card .ttl{font-size:15px;font-weight:600;color:var(--ink-1);line-height:1.55;margin:10px 0 8px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.rec-card .desc{font-size:13.5px;color:var(--ink-3);line-height:1.7;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.rec-card .foot{margin-top:14px;font-size:12.5px;color:var(--ink-3);display:flex;align-items:center;justify-content:space-between;}
.back-entry{display:flex;justify-content:center;}

/* 空态 */
.empty-state{
  min-height:260px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;
  text-align:center;border:1px dashed var(--line);border-radius:var(--r-card);background:rgba(255,255,255,.02);
}
.empty-state i{font-size:30px;color:var(--ink-3);}
.empty-state p{font-size:15px;color:var(--ink-3);}

/* FAQ */
.faq-wrap{padding:8px 0 0;}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;background:none;border:0;cursor:pointer;
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:20px 0;text-align:left;font-size:18px;font-weight:600;color:var(--ink-1);
  transition:color .2s var(--ease);
}
.faq-q:hover{color:var(--brand);}
.faq-q .ico{
  flex-shrink:0;width:26px;height:26px;border-radius:50%;
  display:grid;place-items:center;font-size:13px;color:var(--brand);
  border:1px solid rgba(31,209,178,.45);transition:transform .3s var(--ease);
}
.faq-item.open .faq-q .ico{transform:rotate(45deg);}
.faq-a{max-width:800px;overflow:hidden;max-height:0;transition:max-height .35s var(--ease);}
.faq-a p{font-size:15px;line-height:1.8;color:var(--ink-2);padding-bottom:20px;}
.faq-item.open .faq-a{max-height:340px;}

/* CTA */
.cta-band{
  position:relative;overflow:hidden;text-align:center;
  padding:72px 32px;border-radius:22px;border:1px solid var(--line);
  background:linear-gradient(180deg,rgba(16,26,43,.9),rgba(11,18,32,.9));
}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background:radial-gradient(560px 260px at 50% 8%, rgba(31,209,178,.16), transparent 70%);
}
.cta-band > *{position:relative;z-index:1;}
.cta-band h2{font-size:clamp(24px,3vw,34px);font-weight:750;letter-spacing:-.02em;}
.cta-band p{margin:14px auto 28px;max-width:620px;font-size:15.5px;color:var(--ink-2);}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:center;}

/* 板块间距 */
.section{padding:76px 0;}
.section-tight{padding:56px 0;}
.divider{height:1px;background:var(--line);border:0;margin:0;}

/* 页脚 */
.site-footer{border-top:1px solid var(--line);background:rgba(9,15,26,.72);margin-top:24px;}
.footer-grid{
  display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;
  padding:60px 0 40px;
}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
.footer-desc{font-size:14px;color:var(--ink-3);line-height:1.8;max-width:320px;}
.footer-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px;}
.footer-title{font-size:14.5px;font-weight:700;color:var(--ink-1);margin-bottom:16px;}
.footer-links{display:flex;flex-direction:column;gap:11px;}
.footer-links a{font-size:14px;color:var(--ink-3);transition:color .2s var(--ease), transform .2s var(--ease);}
.footer-links a:hover{color:var(--brand);transform:translateX(2px);}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  padding:20px 0 32px;border-top:1px solid var(--line);
  font-size:13px;color:var(--ink-3);
}
.lang-switch{display:flex;gap:6px;}
.lang-switch span{
  padding:3px 12px;border-radius:var(--r-pill);border:1px solid var(--line);
  font-size:12.5px;color:var(--ink-3);
}
.lang-switch .on{color:var(--brand);border-color:rgba(31,209,178,.5);}

/* 抽屉 */
.drawer{
  position:fixed;inset:0;z-index:80;background:rgba(8,13,23,.98);
  backdrop-filter:blur(16px);
  transform:translateY(-100%);transition:transform .34s var(--ease);
  display:flex;flex-direction:column;
}
.drawer.open{transform:translateY(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;height:68px;padding:0 24px;border-bottom:1px solid var(--line);}
.drawer-close{width:42px;height:42px;border-radius:12px;background:var(--glass);border:1px solid var(--line);color:var(--ink-1);cursor:pointer;}
.drawer-body{padding:16px 24px;display:flex;flex-direction:column;overflow-y:auto;flex:1;}
.drawer-body a{
  height:48px;display:flex;align-items:center;font-size:16px;color:var(--ink-2);
  border-bottom:1px solid var(--line);
}
.drawer-body a.is-active{color:var(--brand);}
.drawer-foot{padding:20px 24px 28px;border-top:1px solid var(--line);}
.drawer-foot .btn{width:100%;}

@media (max-width:1024px){
  .layout{grid-template-columns:minmax(0,1fr);gap:44px;}
  .side{position:static;}
  .rec-grid{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:860px){
  .nav-menu,.cmd-search,.icon-btn{display:none;}
  .nav-toggle{display:grid;place-items:center;}
  .page-head{padding:32px 22px 30px;}
}
@media (max-width:640px){
  .container{padding:0 18px;}
  .section{padding:56px 0;}
  .nav-cards{grid-template-columns:1fr;}
  .rec-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding:44px 0 28px;}
  .brand-word{font-size:15px;}
  .cta-band{padding:52px 20px;border-radius:18px;}
  .footer-bottom{justify-content:flex-start;}
}

/* roulang page: category2 */
:root{
  --bg-base:#0B1220;
  --bg-elev:#101A2B;
  --bg-elev2:#16233A;
  --brand:#1FD1B2;
  --brand-2:#4D8DFF;
  --accent:#FFB24D;
  --hot:#FF4D6D;
  --ink-1:#EEF3FA;
  --ink-2:#B7C4D6;
  --ink-3:#7C8CA3;
  --line:rgba(255,255,255,.08);
  --glass:rgba(255,255,255,.045);
  --radius-card:18px;
  --radius-sm:14px;
  --shadow-card:0 18px 40px -24px rgba(0,0,0,.8);
  --font:-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font);
  background-color:var(--bg-base);
  color:var(--ink-2);
  font-size:16px;
  line-height:1.8;
  background-image:
    radial-gradient(900px 520px at 12% -8%, rgba(31,209,178,.06), transparent 70%),
    radial-gradient(760px 460px at 92% 4%, rgba(77,141,255,.05), transparent 72%),
    linear-gradient(rgba(255,255,255,.018) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.018) 1px, transparent 1px);
  background-size:auto,auto,100% 48px,48px 100%;
  background-attachment:fixed;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none;transition:color .2s ease,opacity .2s ease}
a:hover{color:var(--brand)}
button,input{font-family:inherit;font-size:inherit}
:focus-visible{outline:none;box-shadow:0 0 0 3px rgba(31,209,178,.22)}
h1,h2,h3,h4{margin:0;color:var(--ink-1);font-weight:700;letter-spacing:-.01em}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
.container{width:100%;max-width:1240px;margin:0 auto;padding:0 24px}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:70;
  background:rgba(11,18,32,.72);
  border-bottom:1px solid transparent;
  transition:background .28s ease,border-color .28s ease,backdrop-filter .28s ease;
}
.site-header.is-scrolled{
  background:rgba(11,18,32,.88);
  backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  border-bottom-color:var(--line);
}
.nav{display:flex;align-items:center;height:68px;gap:24px}
.brand{display:inline-flex;align-items:center;gap:10px;font-weight:800;color:var(--ink-1);letter-spacing:-.01em;white-space:nowrap}
.brand-mark{
  width:30px;height:30px;border-radius:9px;display:grid;place-items:center;
  font-size:15px;font-weight:800;color:#04231E;
  background:linear-gradient(140deg,var(--brand),var(--brand-2));
  box-shadow:0 0 0 1px rgba(31,209,178,.45),0 8px 22px -10px rgba(31,209,178,.7);
}
.brand-word{font-size:16.5px}
.nav-menu{display:flex;align-items:center;gap:28px;margin-left:8px}
.nav-link{position:relative;font-size:15px;color:var(--ink-2);padding:6px 0;font-weight:500}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--brand),var(--brand-2));
  transform:scaleX(0);transform-origin:left;transition:transform .24s ease;
}
.nav-link:hover{color:var(--ink-1)}
.nav-link:hover::after,.nav-link.is-active::after{transform:scaleX(1)}
.nav-link.is-active{color:var(--ink-1);font-weight:600}
.nav-right{display:flex;align-items:center;gap:12px;margin-left:auto}
.cmd-search{
  display:flex;align-items:center;gap:8px;width:260px;height:38px;padding:0 10px;
  background:rgba(255,255,255,.05);border:1px solid var(--line);border-radius:12px;
  color:var(--ink-3);transition:border-color .2s ease,box-shadow .2s ease;
}
.cmd-search:focus-within{border-color:rgba(31,209,178,.7);box-shadow:0 0 0 3px rgba(31,209,178,.18)}
.cmd-search input{flex:1;min-width:0;background:transparent;border:0;color:var(--ink-1);font-size:14px;outline:none}
.cmd-search input::placeholder{color:var(--ink-3)}
.kbd{
  font-size:11px;color:var(--ink-3);border:1px solid var(--line);border-radius:6px;
  padding:1px 6px;background:rgba(255,255,255,.04);font-family:ui-monospace,SFMono-Regular,Menlo,monospace;
}
.icon-btn{
  width:38px;height:38px;display:grid;place-items:center;border-radius:12px;
  border:1px solid var(--line);background:var(--glass);color:var(--ink-2);
  transition:border-color .2s ease,color .2s ease,transform .2s ease;
}
.icon-btn:hover{border-color:rgba(31,209,178,.6);color:var(--brand);transform:translateY(-1px)}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-size:15px;font-weight:600;border-radius:999px;border:1px solid transparent;
  padding:12px 24px;cursor:pointer;transition:transform .2s ease,box-shadow .2s ease,background .2s ease,border-color .2s ease,filter .2s ease;
}
.btn-sm{padding:9px 18px;font-size:14px}
.btn-primary{
  color:#04231E;background:linear-gradient(120deg,var(--brand),var(--brand) 62%,var(--brand-2));
  box-shadow:0 0 0 1px rgba(31,209,178,.5),0 8px 28px -8px rgba(31,209,178,.55);
}
.btn-primary:hover{transform:translateY(-1px);filter:brightness(1.08);box-shadow:0 0 0 1px rgba(31,209,178,.6),0 12px 38px -8px rgba(31,209,178,.75)}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{
  color:var(--ink-1);background:var(--glass);border-color:var(--line);
  backdrop-filter:blur(14px) saturate(140%);-webkit-backdrop-filter:blur(14px) saturate(140%);
}
.btn-ghost:hover{border-color:rgba(31,209,178,.65);color:var(--brand);transform:translateY(-1px)}
.btn[disabled],.btn.is-disabled{opacity:.45;pointer-events:none}
.nav-toggle{
  display:none;width:38px;height:38px;border-radius:12px;border:1px solid var(--line);
  background:var(--glass);color:var(--ink-1);cursor:pointer;
}
.drawer{
  position:fixed;inset:68px 0 0;z-index:65;background:rgba(11,18,32,.97);
  backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  transform:translateY(-12px);opacity:0;pointer-events:none;transition:opacity .25s ease,transform .25s ease;
  display:flex;flex-direction:column;padding:16px 24px 24px;
}
.drawer.is-open{opacity:1;transform:translateY(0);pointer-events:auto}
.drawer a{display:flex;align-items:center;height:48px;font-size:16px;color:var(--ink-1);border-bottom:1px solid var(--line)}
.drawer a.is-active{color:var(--brand)}
.drawer-cta{margin-top:auto;padding-top:16px}

/* ---------- breadcrumb & hero ---------- */
.crumb{font-size:13px;color:var(--ink-3);padding:22px 0 0;display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.crumb a{color:var(--ink-3)}
.crumb a:hover{color:var(--brand)}
.crumb .sep{opacity:.5}
.cat-hero{
  position:relative;overflow:hidden;border-radius:24px;margin-top:18px;
  border:1px solid var(--line);background:var(--bg-elev);
  padding:56px 48px;
}
.cat-hero::before{
  content:"";position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;opacity:.16;
}
.cat-hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(120deg,rgba(11,18,32,.96) 18%,rgba(11,18,32,.66) 62%,rgba(11,18,32,.9));
}
.cat-hero > *{position:relative;z-index:2}
.cat-hero h1{font-size:clamp(26px,3.2vw,40px);line-height:1.2;font-weight:750;margin:16px 0 14px}
.cat-lead{max-width:720px;font-size:16px;color:var(--ink-2)}
.hero-meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
.tag{
  display:inline-flex;align-items:center;gap:6px;height:26px;padding:0 12px;border-radius:999px;
  font-size:12.5px;color:var(--ink-2);background:var(--glass);border:1px solid var(--line);
}
.tag--brand{color:var(--brand);border-color:rgba(31,209,178,.42);background:rgba(31,209,178,.08)}
.tag--warm{color:var(--accent);border-color:rgba(255,178,77,.36);background:rgba(255,178,77,.08)}

/* ---------- filter ---------- */
.filter-bar{display:flex;flex-wrap:wrap;gap:10px;margin:34px 0 0;align-items:center}
.chip{
  display:inline-flex;align-items:center;gap:7px;height:34px;padding:0 16px;border-radius:999px;
  font-size:13.5px;color:var(--ink-2);background:var(--glass);border:1px solid var(--line);cursor:pointer;
  transition:border-color .2s ease,color .2s ease,background .2s ease,transform .2s ease;
}
.chip:hover{border-color:rgba(31,209,178,.55);color:var(--ink-1);transform:translateY(-1px)}
.chip.is-active{color:#04231E;background:linear-gradient(120deg,var(--brand),var(--brand-2));border-color:transparent;font-weight:600}

/* ---------- section shell ---------- */
.section{padding:88px 0}
.section--tight{padding:56px 0 88px}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap;margin-bottom:36px}
.section-head h2{font-size:clamp(22px,2.4vw,30px);line-height:1.25}
.section-head p{font-size:14.5px;color:var(--ink-3);margin-top:10px;max-width:640px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:12.5px;letter-spacing:.14em;
  color:var(--brand);text-transform:uppercase;font-weight:600;margin-bottom:12px;
}
.eyebrow::before{content:"";width:22px;height:1px;background:linear-gradient(90deg,var(--brand),transparent)}

/* ---------- staggered grid ---------- */
.stagger-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
.stagger-grid > *:nth-child(even){margin-top:40px}
.mix-card{
  position:relative;border-radius:var(--radius-card);border:1px solid var(--line);
  background:linear-gradient(180deg,rgba(255,255,255,.05),rgba(255,255,255,.015));
  box-shadow:var(--shadow-card),inset 0 1px 0 rgba(255,255,255,.06);
  backdrop-filter:blur(14px) saturate(140%);-webkit-backdrop-filter:blur(14px) saturate(140%);
  overflow:hidden;transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.mix-card:hover{transform:translateY(-4px);border-color:rgba(31,209,178,.45);box-shadow:0 26px 54px -28px rgba(0,0,0,.9),0 0 0 1px rgba(31,209,178,.22)}
.mix-cover{position:relative;overflow:hidden;aspect-ratio:16/9;background:var(--bg-elev2)}
.mix-card:nth-child(4n+2) .mix-cover{aspect-ratio:4/3}
.mix-card:nth-child(4n+4) .mix-cover{aspect-ratio:5/4}
.mix-cover img{width:100%;height:100%;object-fit:cover;transition:transform .45s ease}
.mix-card:hover .mix-cover img{transform:scale(1.05)}
.mix-cover::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(11,18,32,.15),rgba(11,18,32,.78))}
.mix-badges{position:absolute;top:14px;left:14px;z-index:2;display:flex;gap:8px;flex-wrap:wrap;max-width:calc(100% - 28px)}
.badge{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:999px;
  font-size:12px;color:var(--ink-2);background:rgba(11,18,32,.6);border:1px solid var(--line);
  backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);
}
.badge--brand{color:var(--brand);border-color:rgba(31,209,178,.5);background:rgba(11,18,32,.62)}
.badge--warm{color:var(--accent);border-color:rgba(255,178,77,.45);background:rgba(11,18,32,.62)}
.badge--hot{color:var(--hot);border-color:rgba(255,77,109,.45);background:rgba(11,18,32,.62)}
.mix-body{padding:22px 22px 24px}
.mix-body h3{font-size:19px;line-height:1.45;font-weight:650;margin-bottom:10px}
.mix-body p{font-size:14.5px;color:var(--ink-2);display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.mix-foot{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:18px;padding-top:14px;border-top:1px solid var(--line)}
.mix-foot time{font-size:13px;color:var(--ink-3);font-family:ui-monospace,SFMono-Regular,Menlo,monospace}
.mix-more{font-size:13.5px;color:var(--brand);display:inline-flex;align-items:center;gap:6px}
.mix-more:hover{gap:10px}

/* ---------- steps ---------- */
.steps{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px;counter-reset:step}
.step{
  position:relative;padding:26px 22px 24px;border-radius:var(--radius-card);
  border:1px solid var(--line);background:var(--bg-elev);
  transition:border-color .25s ease,transform .25s ease;
}
.step:hover{border-color:rgba(31,209,178,.4);transform:translateY(-3px)}
.step::before{
  counter-increment:step;content:"0" counter(step);
  font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:13px;letter-spacing:.12em;
  color:var(--accent);display:block;margin-bottom:14px;
}
.step h3{font-size:17px;margin-bottom:8px}
.step p{font-size:14.5px}
.step-line{
  height:1px;margin-top:26px;
  background:linear-gradient(90deg,rgba(31,209,178,.5),rgba(31,209,178,.06) 60%,transparent);
}

/* ---------- scenario ---------- */
.scene-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}
.scene{
  padding:28px 24px;border-radius:var(--radius-card);border:1px solid var(--line);
  background:var(--glass);backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  transition:transform .25s ease,border-color .25s ease;
}
.scene:hover{transform:translateY(-3px);border-color:rgba(77,141,255,.45)}
.scene i{font-size:20px;color:var(--brand);margin-bottom:16px;display:block}
.scene h3{font-size:18px;margin-bottom:10px}
.scene p{font-size:14.5px}
.scene ul{margin-top:14px;display:grid;gap:8px}
.scene li{font-size:14px;color:var(--ink-2);padding-left:16px;position:relative}
.scene li::before{content:"";position:absolute;left:0;top:11px;width:6px;height:6px;border-radius:2px;background:rgba(31,209,178,.7)}

/* ---------- faq ---------- */
.faq{max-width:800px;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;
  padding:22px 0;font-size:18px;font-weight:600;color:var(--ink-1);transition:color .2s ease;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{
  content:"+";font-size:22px;font-weight:400;color:var(--brand);line-height:1;
  transition:transform .25s ease;flex:0 0 auto;
}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq summary:hover{color:var(--brand)}
.faq .faq-a{padding:0 0 22px;font-size:15px;color:var(--ink-2);max-width:760px}

/* ---------- pagination ---------- */
.pager{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin-top:48px}
.pager a,.pager span{
  min-width:40px;height:40px;padding:0 14px;border-radius:12px;display:inline-flex;
  align-items:center;justify-content:center;font-size:14px;border:1px solid var(--line);
  background:var(--glass);color:var(--ink-2);transition:border-color .2s ease,color .2s ease,background .2s ease;
}
.pager a:hover{border-color:rgba(31,209,178,.55);color:var(--brand)}
.pager .current{background:linear-gradient(120deg,var(--brand),var(--brand-2));color:#04231E;border-color:transparent;font-weight:600}
.pager .is-disabled{opacity:.4;pointer-events:none}
.pager-note{font-size:13px;color:var(--ink-3);margin-top:14px}

/* ---------- cta ---------- */
.cta-band{
  position:relative;overflow:hidden;border-radius:24px;border:1px solid var(--line);
  background:var(--bg-elev);padding:64px 40px;text-align:center;
}
.cta-band::before{
  content:"";position:absolute;width:640px;height:640px;left:50%;top:-320px;transform:translateX(-50%);
  background:radial-gradient(circle,rgba(31,209,178,.16),transparent 66%);pointer-events:none;
}
.cta-band > *{position:relative;z-index:2}
.cta-band h2{font-size:clamp(24px,3vw,34px);margin-bottom:14px}
.cta-band p{max-width:620px;margin:0 auto 28px;font-size:15.5px;color:var(--ink-2)}
.cta-actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}

/* ---------- footer ---------- */
.site-footer{margin-top:24px;border-top:1px solid var(--line);background:rgba(11,18,32,.72)}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:32px;padding:64px 0 40px}
.footer-brand{display:flex;align-items:center;gap:10px;color:var(--ink-1);font-weight:800;margin-bottom:14px}
.footer-desc{font-size:14px;color:var(--ink-3);max-width:320px}
.footer-tags{display:flex;gap:8px;margin-top:16px;flex-wrap:wrap}
.footer-title{font-size:14px;color:var(--ink-1);font-weight:600;margin-bottom:16px;letter-spacing:.02em}
.footer-links{display:grid;gap:11px}
.footer-links a{font-size:14px;color:var(--ink-3)}
.footer-links a:hover{color:var(--brand)}
.footer-bottom{
  border-top:1px solid var(--line);padding:20px 0 28px;display:flex;align-items:center;
  justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13px;color:var(--ink-3);
}
.lang-switch{display:flex;gap:6px;align-items:center}
.lang-switch span{padding:3px 10px;border-radius:8px;border:1px solid var(--line)}
.lang-switch .on{color:var(--brand);border-color:rgba(31,209,178,.45);background:rgba(31,209,178,.08)}

/* ---------- responsive ---------- */
@media (max-width:1024px){
  .nav-menu{display:none}
  .nav-toggle{display:grid;place-items:center}
  .cmd-search{display:none}
  .steps{grid-template-columns:repeat(2,minmax(0,1fr))}
  .scene-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .section{padding:72px 0}
}
@media (max-width:768px){
  .container{padding:0 18px}
  .cat-hero{padding:36px 22px;border-radius:18px}
  .stagger-grid{grid-template-columns:1fr}
  .stagger-grid > *:nth-child(even){margin-top:0}
  .mix-card:nth-child(4n+2) .mix-cover,
  .mix-card:nth-child(4n+4) .mix-cover{aspect-ratio:16/9}
  .section{padding:56px 0}
  .section--tight{padding:40px 0 56px}
  .cta-band{padding:44px 22px}
  .faq summary{font-size:16.5px;padding:18px 0}
  .footer-grid{grid-template-columns:1fr;padding:48px 0 32px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}
@media (max-width:520px){
  .steps,.scene-grid{grid-template-columns:1fr}
  .brand-word{font-size:15px}
  .btn{padding:11px 20px;font-size:14.5px}
}

/* roulang page: category4 */
:root{
  --bg-base:#0B1220;
  --bg-elev:#101A2B;
  --bg-elev2:#16233A;
  --brand:#1FD1B2;
  --brand-2:#4D8DFF;
  --accent:#FFB24D;
  --hot:#FF4D6D;
  --ink-1:#EEF3FA;
  --ink-2:#B7C4D6;
  --ink-3:#7C8CA3;
  --line:rgba(255,255,255,.08);
  --glass:rgba(255,255,255,.045);
  --r-lg:18px;
  --r-md:14px;
  --shadow-card:0 18px 40px -24px rgba(0,0,0,.8);
  --font-sans:-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",sans-serif;
  --font-mono:ui-monospace,"SFMono-Regular","Inter",Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.8;
  color:var(--ink-2);
  background:var(--bg-base);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  background:
    radial-gradient(900px 520px at 12% -8%, rgba(31,209,178,.06), transparent 62%),
    radial-gradient(760px 460px at 92% 2%, rgba(77,141,255,.05), transparent 60%),
    repeating-linear-gradient(90deg, rgba(255,255,255,.022) 0 1px, transparent 1px 64px),
    repeating-linear-gradient(0deg, rgba(255,255,255,.022) 0 1px, transparent 1px 64px);
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none;transition:color .2s ease,opacity .2s ease}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
input,textarea,select{font:inherit}
ul,ol{margin:0;padding:0;list-style:none}
::selection{background:rgba(31,209,178,.28);color:#fff}
:focus-visible{outline:none;box-shadow:0 0 0 3px rgba(31,209,178,.22);border-radius:8px}
.container{width:100%;max-width:1240px;margin:0 auto;padding:0 24px}
main{position:relative;z-index:1}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(11,18,32,.72);
  border-bottom:1px solid transparent;
  transition:background .25s ease,border-color .25s ease,backdrop-filter .25s ease;
}
.site-header.is-scrolled{
  background:rgba(11,18,32,.9);
  backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  border-bottom-color:var(--line);
}
.nav{display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:68px}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{
  width:34px;height:34px;flex:none;border-radius:11px;display:grid;place-items:center;
  font-size:16px;font-weight:800;color:#04231E;
  background:linear-gradient(140deg,var(--brand) 0%,#38E0C4 58%,var(--brand-2) 100%);
  box-shadow:0 0 0 1px rgba(31,209,178,.5),0 8px 24px -10px rgba(31,209,178,.7);
}
.brand-word{font-size:17px;font-weight:750;color:var(--ink-1);letter-spacing:-.01em;white-space:nowrap}
.nav-menu{display:flex;align-items:center;gap:28px}
.nav-link{position:relative;display:inline-block;padding:6px 0;font-size:14.5px;color:var(--ink-2);white-space:nowrap}
.nav-link::after{content:"";position:absolute;left:0;bottom:0;height:2px;width:0;border-radius:2px;background:var(--brand);transition:width .22s ease}
.nav-link:hover{color:var(--ink-1)}
.nav-link:hover::after{width:100%}
.nav-link.is-active{color:var(--ink-1)}
.nav-link.is-active::after{width:100%}
.nav-right{display:flex;align-items:center;gap:12px}
.cmd-search{
  display:flex;align-items:center;gap:8px;width:260px;padding:8px 12px;border-radius:999px;
  background:rgba(255,255,255,.05);border:1px solid var(--line);color:var(--ink-3);
  transition:border-color .2s ease,box-shadow .2s ease,background .2s ease;
}
.cmd-search:focus-within{border-color:rgba(31,209,178,.6);box-shadow:0 0 0 3px rgba(31,209,178,.16);background:rgba(255,255,255,.07)}
.cmd-search input{flex:1;min-width:0;border:0;outline:none;background:transparent;color:var(--ink-1);font-size:13.5px}
.cmd-search input::placeholder{color:var(--ink-3)}
.kbd{font-family:var(--font-mono);font-size:11px;color:var(--ink-3);padding:2px 6px;border-radius:6px;border:1px solid var(--line);background:rgba(255,255,255,.04)}
.icon-btn{
  width:38px;height:38px;display:grid;place-items:center;border-radius:12px;
  background:var(--glass);border:1px solid var(--line);color:var(--ink-2);
  transition:color .2s ease,border-color .2s ease,transform .2s ease;
}
.icon-btn:hover{color:var(--brand);border-color:rgba(31,209,178,.5);transform:translateY(-1px)}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:999px;padding:12px 24px;font-size:15px;font-weight:600;
  transition:transform .2s ease,box-shadow .2s ease,filter .2s ease,border-color .2s ease,color .2s ease;
}
.btn-primary{
  color:#04231E;
  background:linear-gradient(100deg,var(--brand) 0%,var(--brand) 66%,var(--brand-2) 100%);
  box-shadow:0 0 0 1px rgba(31,209,178,.5),0 8px 28px -8px rgba(31,209,178,.55);
}
.btn-primary:hover{transform:translateY(-1px);filter:brightness(1.08);box-shadow:0 0 0 1px rgba(31,209,178,.6),0 12px 34px -8px rgba(31,209,178,.75)}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{
  color:var(--ink-1);background:var(--glass);border:1px solid var(--line);
  backdrop-filter:blur(14px) saturate(140%);-webkit-backdrop-filter:blur(14px) saturate(140%);
}
.btn-ghost:hover{border-color:rgba(31,209,178,.55);color:#BFF6EA}
.btn-sm{padding:9px 18px;font-size:14px}
.nav-toggle{
  display:none;width:40px;height:40px;align-items:center;justify-content:center;border-radius:12px;
  background:var(--glass);border:1px solid var(--line);color:var(--ink-1);
}

/* ============ 徽章 / 标签 ============ */
.badge{
  display:inline-flex;align-items:center;gap:6px;height:25px;padding:0 11px;border-radius:999px;
  font-size:12.5px;line-height:1;color:var(--ink-2);background:var(--glass);
  border:1px solid var(--line);white-space:nowrap;
}
.badge--brand{color:#8CF2DF;border-color:rgba(31,209,178,.45);background:rgba(31,209,178,.1)}
.badge--accent{color:#FFD79B;border-color:rgba(255,178,77,.4);background:rgba(255,178,77,.1)}
.badge--hot{color:#FF9FB0;border-color:rgba(255,77,109,.4);background:rgba(255,77,109,.1)}

/* ============ 页头 ============ */
.page-hero{position:relative;overflow:hidden;padding:60px 0 48px;border-bottom:1px solid var(--line)}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background:url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
  opacity:.16;
}
.page-hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(11,18,32,.7) 0%,rgba(11,18,32,.92) 62%,var(--bg-base) 100%);
}
.page-hero .container{position:relative;z-index:1}
.breadcrumb{display:flex;align-items:center;gap:8px;flex-wrap:wrap;font-size:13px;color:var(--ink-3);margin-bottom:22px}
.breadcrumb a{color:var(--ink-3)}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb i{font-size:10px;opacity:.6}
.hero-badges{display:flex;flex-wrap:wrap;gap:10px}
.page-title{
  font-size:clamp(26px,3.2vw,40px);line-height:1.2;font-weight:750;
  color:var(--ink-1);letter-spacing:-.02em;margin:14px 0 16px;max-width:24em;
}
.lede{font-size:16px;color:var(--ink-2);max-width:800px;margin:0}
.toc-mobile{
  display:none;margin-top:26px;padding:0 18px;border-radius:var(--r-md);
  background:var(--glass);border:1px solid var(--line);
}
.toc-mobile summary{
  cursor:pointer;padding:14px 0;font-size:14px;font-weight:600;color:var(--ink-1);
  list-style:none;display:flex;align-items:center;justify-content:space-between;
}
.toc-mobile summary::-webkit-details-marker{display:none}
.toc-mobile summary::after{content:"\f078";font-family:"Font Awesome 6 Free";font-weight:900;font-size:12px;color:var(--brand)}
.toc-mobile[open] summary::after{content:"\f077"}

/* ============ 板块 ============ */
.section{padding:88px 0;position:relative}
.section-tight{padding:44px 0 8px}
.section-head{margin-bottom:28px}
.section-title{font-size:clamp(22px,2.4vw,30px);font-weight:700;color:var(--ink-1);letter-spacing:-.01em;margin:0 0 10px}
.section-sub{font-size:15px;color:var(--ink-3);margin:0;max-width:780px}

/* 筛选胶囊 */
.filters{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:28px}
.chip{
  display:inline-flex;align-items:center;height:34px;padding:0 16px;border-radius:999px;
  font-size:13.5px;color:var(--ink-2);background:var(--glass);border:1px solid var(--line);
  transition:color .2s ease,border-color .2s ease,box-shadow .2s ease,background .2s ease;
}
.chip:hover{color:var(--ink-1);border-color:rgba(31,209,178,.45)}
.chip.is-on{
  color:#04231E;font-weight:600;border-color:transparent;
  background:linear-gradient(100deg,var(--brand) 0%,#3ADCC0 70%,var(--brand-2) 100%);
  box-shadow:0 8px 24px -10px rgba(31,209,178,.7);
}

/* 数据条 */
.stat-strip{
  display:grid;grid-template-columns:repeat(4,1fr);overflow:hidden;
  border-radius:var(--r-lg);border:1px solid var(--line);background:var(--glass);
  backdrop-filter:blur(14px) saturate(140%);-webkit-backdrop-filter:blur(14px) saturate(140%);
  box-shadow:var(--shadow-card);
}
.stat{padding:22px 24px;border-right:1px solid var(--line)}
.stat:last-child{border-right:0}
.stat-num{font-family:var(--font-mono);font-size:21px;font-weight:700;color:var(--ink-1);letter-spacing:-.01em}
.stat-label{font-size:13px;color:var(--ink-3);margin-top:6px}

/* 主布局 */
.layout{display:grid;grid-template-columns:minmax(0,1fr);gap:36px}
.side-col{display:flex;flex-direction:column;gap:20px}

/* 编号清单 */
.index-list{border-top:1px solid var(--line)}
.index-item{border-bottom:1px solid var(--line)}
.index-row{
  display:grid;grid-template-columns:64px minmax(0,1fr);gap:18px;padding:26px 4px;
  transition:transform .22s ease,background .22s ease;
}
.index-row:hover .index-no{color:var(--brand)}
.index-no{
  font-family:var(--font-mono);font-size:38px;font-weight:800;line-height:1;letter-spacing:-.03em;
  color:rgba(31,209,178,.26);transition:color .22s ease;
}
.item-title{font-size:18px;font-weight:600;line-height:1.5;color:var(--ink-1);margin:0 0 8px}
.item-desc{margin:0 0 12px;font-size:15px;color:var(--ink-2)}
.item-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:13px;color:var(--ink-3)}
.item-meta time{font-family:var(--font-mono)}

/* 分页 */
.pager{display:flex;align-items:center;gap:10px;margin-top:32px;flex-wrap:wrap}
.page-link{
  display:inline-flex;align-items:center;justify-content:center;min-width:40px;height:40px;padding:0 14px;
  border-radius:12px;font-size:14px;color:var(--ink-2);background:var(--glass);border:1px solid var(--line);
  transition:color .2s ease,border-color .2s ease,background .2s ease;
}
.page-link:hover{color:var(--ink-1);border-color:rgba(31,209,178,.45)}
.page-link.is-current{
  color:#04231E;font-weight:600;border-color:transparent;
  background:linear-gradient(100deg,var(--brand) 0%,#3ADCC0 70%,var(--brand-2) 100%);
}
.page-link.is-disabled{opacity:.45;pointer-events:none}

/* 侧栏目录 */
.toc{
  position:sticky;top:96px;padding:22px;border-radius:var(--r-lg);
  background:var(--glass);border:1px solid var(--line);
  backdrop-filter:blur(14px) saturate(140%);-webkit-backdrop-filter:blur(14px) saturate(140%);
  box-shadow:var(--shadow-card);
}
.toc-title{font-size:13px;font-weight:600;letter-spacing:.08em;color:var(--ink-3);margin:0 0 12px}
.toc-list a{display:block;padding:9px 0;font-size:14px;color:var(--ink-2);border-bottom:1px solid var(--line);transition:color .2s ease,padding-left .2s ease}
.toc-list li:last-child a{border-bottom:0}
.toc-list a:hover{color:var(--brand);padding-left:4px}
.toc-note{
  margin-top:20px;padding:18px;border-radius:var(--r-md);font-size:13.5px;color:var(--ink-2);
  background:linear-gradient(150deg,rgba(31,209,178,.1),rgba(77,141,255,.06));
  border:1px solid rgba(31,209,178,.22);
}
.toc-note strong{display:block;color:var(--ink-1);font-size:14px;margin-bottom:6px}

/* 图文 + 步骤 */
.split{display:grid;gap:32px;align-items:center}
.split-media{position:relative;overflow:hidden;border-radius:var(--r-lg);border:1px solid var(--line);box-shadow:var(--shadow-card);aspect-ratio:16/10}
.split-media img{width:100%;height:100%;object-fit:cover}
.split-media::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(11,18,32,.04),rgba(11,18,32,.55))}
.steps{display:grid;gap:16px}
.step{display:grid;grid-template-columns:40px minmax(0,1fr);gap:16px;padding:20px;border-radius:var(--r-md);background:var(--glass);border:1px solid var(--line);transition:border-color .2s ease,transform .2s ease}
.step:hover{border-color:rgba(31,209,178,.4);transform:translateY(-2px)}
.step-no{
  width:32px;height:32px;border-radius:10px;display:grid;place-items:center;
  font-family:var(--font-mono);font-size:13px;font-weight:700;color:#04231E;
  background:linear-gradient(140deg,var(--brand) 0%,#3ADCC0 100%);
}
.step h3{margin:0 0 6px;font-size:16.5px;font-weight:600;color:var(--ink-1)}
.step p{margin:0;font-size:14.5px;color:var(--ink-2)}

/* FAQ */
.faq{max-width:880px}
.faq-item{border-top:1px solid var(--line)}
.faq-item:last-child{border-bottom:1px solid var(--line)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  text-align:left;padding:22px 0;font-size:18px;font-weight:600;color:var(--ink-1);
  transition:color .2s ease;
}
.faq-q:hover{color:#9FF3E2}
.faq-icon{flex:none;width:24px;height:24px;display:grid;place-items:center;font-size:15px;color:var(--brand);transition:transform .25s ease}
.faq-item.is-open .faq-icon{transform:rotate(45deg)}
.faq-a{display:none;max-width:800px;padding:0 0 22px;font-size:15px;line-height:1.8;color:var(--ink-2)}

/* CTA */
.cta-section{padding:72px 0 96px}
.cta-panel{
  position:relative;overflow:hidden;text-align:center;padding:64px 32px;border-radius:24px;
  background:var(--bg-elev);border:1px solid var(--line);box-shadow:var(--shadow-card);
}
.cta-panel::before{
  content:"";position:absolute;left:50%;top:-42%;transform:translateX(-50%);
  width:760px;height:520px;pointer-events:none;
  background:radial-gradient(circle,rgba(31,209,178,.16),transparent 65%);
}
.cta-panel h2{position:relative;font-size:clamp(22px,2.6vw,32px);font-weight:700;color:var(--ink-1);letter-spacing:-.01em;margin:0 0 14px}
.cta-panel p{position:relative;margin:0 auto 28px;max-width:640px;font-size:15.5px;color:var(--ink-2)}
.cta-actions{position:relative;display:flex;flex-wrap:wrap;gap:14px;justify-content:center}

/* ============ 页脚 ============ */
.site-footer{position:relative;z-index:1;padding:64px 0 28px;background:var(--bg-elev);border-top:1px solid var(--line)}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.footer-desc{font-size:14px;line-height:1.7;color:var(--ink-3);margin:0 0 16px;max-width:330px}
.footer-tags{display:flex;flex-wrap:wrap;gap:8px}
.footer-title{font-size:14px;font-weight:600;color:var(--ink-1);margin:0 0 14px}
.footer-links{display:flex;flex-direction:column}
.footer-links a{font-size:14px;color:var(--ink-3);padding:6px 0}
.footer-links a:hover{color:var(--brand)}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between;
  margin-top:44px;padding-top:20px;border-top:1px solid var(--line);font-size:13px;color:var(--ink-3);
}
.lang-switch{display:inline-flex;gap:6px}
.lang-switch span{padding:4px 10px;border-radius:8px;border:1px solid var(--line);background:var(--glass)}
.lang-switch .on{color:#8CF2DF;border-color:rgba(31,209,178,.45)}

/* ============ 响应式 ============ */
@media (min-width:768px){
  .split{grid-template-columns:1.02fr 1fr}
}
@media (min-width:1024px){
  .layout{grid-template-columns:minmax(0,1fr) 300px}
  .index-row:hover{transform:translateX(4px)}
}
@media (max-width:1023px){
  .nav-toggle{display:inline-flex}
  .cmd-search,.icon-btn{display:none}
  .nav-right .btn-primary{display:none}
  .site-header.is-open .nav-right .btn-primary{
    display:inline-flex;position:fixed;left:24px;right:24px;bottom:24px;z-index:70;padding:14px 24px;font-size:15px;
  }
  .nav-menu{
    position:fixed;top:68px;left:0;right:0;bottom:0;z-index:65;
    display:none;flex-direction:column;align-items:stretch;gap:0;
    padding:12px 24px 120px;overflow-y:auto;
    background:rgba(11,18,32,.97);
    backdrop-filter:blur(14px) saturate(140%);-webkit-backdrop-filter:blur(14px) saturate(140%);
    border-top:1px solid var(--line);
  }
  .nav-menu .nav-link{display:flex;align-items:center;height:48px;font-size:16px;border-bottom:1px solid var(--line)}
  .nav-menu .nav-link::after{display:none}
  .site-header.is-open{background:rgba(11,18,32,.97)}
  .site-header.is-open .nav-menu{display:flex}
  .toc-mobile{display:block}
  .side-col .toc{display:none}
  .stat-strip{grid-template-columns:repeat(2,1fr)}
  .stat:nth-child(2){border-right:0}
  .stat:nth-child(1),.stat:nth-child(2){border-bottom:1px solid var(--line)}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:768px){
  .container{padding:0 20px}
  .section{padding:60px 0}
  .section-tight{padding:36px 0 4px}
  .page-hero{padding:38px 0 36px}
  .cta-section{padding:56px 0 68px}
  .cta-panel{padding:48px 22px}
  .faq-q{font-size:16.5px;padding:18px 0}
}
@media (max-width:640px){
  .index-row{grid-template-columns:46px minmax(0,1fr);gap:12px;padding:20px 2px}
  .index-no{font-size:26px}
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}
@media (max-width:520px){
  .container{padding:0 16px}
  .brand-word{font-size:15px}
  .stat{padding:18px 16px}
  .stat-num{font-size:18px}
  .cta-actions .btn{width:100%}
}

/* roulang page: category3 */
:root{
  --bg-base:#0B1220;
  --bg-elev:#101A2B;
  --bg-elev2:#16233A;
  --brand:#1FD1B2;
  --brand-2:#4D8DFF;
  --accent:#FFB24D;
  --hot:#FF4D6D;
  --ink-1:#EEF3FA;
  --ink-2:#B7C4D6;
  --ink-3:#7C8CA3;
  --line:rgba(255,255,255,.08);
  --glass:rgba(255,255,255,.045);
  --radius:18px;
  --radius-sm:14px;
  --shadow-card:0 18px 40px -24px rgba(0,0,0,.8);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body.site-body{
  margin:0;
  font-family:-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--ink-2);
  background:var(--bg-base);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body.site-body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  background:
    radial-gradient(900px 520px at 10% -6%, rgba(31,209,178,.07), transparent 62%),
    radial-gradient(760px 480px at 90% 2%, rgba(77,141,255,.055), transparent 64%),
    linear-gradient(rgba(255,255,255,.024) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.024) 1px, transparent 1px);
  background-size:auto,auto,100% 48px,48px 100%;
}
.site-body a{color:inherit;text-decoration:none}
.site-body img{max-width:100%;display:block}
.site-body h1,.site-body h2,.site-body h3,.site-body h4{margin:0;color:var(--ink-1);font-weight:700;letter-spacing:-.01em}
.site-body p{margin:0}
.site-body ul{margin:0;padding:0;list-style:none}
.site-body button{font-family:inherit}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.container{width:100%;max-width:1240px;margin:0 auto;padding:0 24px;position:relative;z-index:1}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(11,18,32,.72);
  backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  border-bottom:1px solid transparent;
  transition:border-color .25s ease, background .25s ease;
}
.site-header.is-scrolled{border-bottom-color:var(--line);background:rgba(11,18,32,.92)}
.nav{display:flex;align-items:center;gap:28px;height:68px}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{
  width:34px;height:34px;border-radius:11px;display:inline-flex;align-items:center;justify-content:center;
  font-size:15px;font-weight:800;color:#04231E;
  background:linear-gradient(140deg,#1FD1B2,#1FD1B2 68%,#4D8DFF);
  box-shadow:0 0 0 1px rgba(31,209,178,.5),0 8px 22px -10px rgba(31,209,178,.7);
}
.brand-word{font-size:17px;font-weight:750;color:var(--ink-1);letter-spacing:.01em;white-space:nowrap}
.nav-menu{display:flex;align-items:center;gap:28px;margin-left:8px}
.nav-link{
  position:relative;font-size:15px;font-weight:500;color:var(--ink-2);
  padding:6px 0;transition:color .2s ease;white-space:nowrap;
}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;border-radius:2px;
  background:var(--brand);transform:scaleX(0);transform-origin:left;transition:transform .22s ease;
}
.nav-link:hover{color:var(--ink-1)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.is-active{color:var(--ink-1);font-weight:600}
.nav-link.is-active::after{transform:scaleX(1)}
.nav-right{display:flex;align-items:center;gap:14px;margin-left:auto}
.cmd-search{
  display:flex;align-items:center;gap:10px;width:260px;height:40px;padding:0 12px;
  border-radius:12px;background:rgba(255,255,255,.05);border:1px solid var(--line);
  transition:border-color .2s ease, box-shadow .2s ease;
}
.cmd-search i{color:var(--ink-3);font-size:13px}
.cmd-search input{
  flex:1;min-width:0;background:transparent;border:0;outline:none;color:var(--ink-1);font-size:14px;
}
.cmd-search input::placeholder{color:var(--ink-3)}
.cmd-search:focus-within{border-color:rgba(31,209,178,.6);box-shadow:0 0 0 3px rgba(31,209,178,.16)}
.kbd{
  font-size:11px;color:var(--ink-3);border:1px solid var(--line);border-radius:6px;
  padding:1px 6px;background:rgba(255,255,255,.04);white-space:nowrap;
}
.icon-btn{
  width:40px;height:40px;border-radius:12px;display:inline-flex;align-items:center;justify-content:center;
  color:var(--ink-2);background:var(--glass);border:1px solid var(--line);transition:.2s ease;
}
.icon-btn:hover{color:var(--brand);border-color:rgba(31,209,178,.45)}
.nav-toggle{
  display:none;width:40px;height:40px;border-radius:12px;background:var(--glass);
  border:1px solid var(--line);color:var(--ink-1);cursor:pointer;font-size:16px;
}
.nav-toggle:hover{border-color:rgba(31,209,178,.45)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-size:15px;font-weight:600;line-height:1;border-radius:999px;padding:14px 26px;
  border:1px solid transparent;cursor:pointer;transition:transform .2s ease, box-shadow .25s ease, filter .2s ease, border-color .2s ease;
  white-space:nowrap;
}
.btn-sm{padding:11px 20px;font-size:14px}
.btn-primary{
  color:#04231E;
  background:linear-gradient(135deg,#1FD1B2 0%,#1FD1B2 72%,#4D8DFF 100%);
  box-shadow:0 0 0 1px rgba(31,209,178,.5),0 8px 28px -8px rgba(31,209,178,.55);
}
.btn-primary:hover{transform:translateY(-1px);filter:brightness(1.08);box-shadow:0 0 0 1px rgba(31,209,178,.6),0 12px 34px -8px rgba(31,209,178,.75)}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{
  color:var(--ink-1);background:var(--glass);border-color:var(--line);
  backdrop-filter:blur(12px) saturate(140%);
}
.btn-ghost:hover{border-color:rgba(31,209,178,.6);color:#fff}
.btn:focus-visible,.icon-btn:focus-visible,.nav-toggle:focus-visible,.chip:focus-visible,
a:focus-visible,summary:focus-visible{outline:none;box-shadow:0 0 0 3px rgba(31,209,178,.22)}
.btn[disabled],.btn.is-disabled{opacity:.45;pointer-events:none}

/* ---------- badges / chips ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;height:26px;padding:0 12px;border-radius:999px;
  font-size:12.5px;line-height:1;color:var(--ink-2);
  background:var(--glass);border:1px solid var(--line);white-space:nowrap;
}
.badge--brand{color:#8DF3E2;border-color:rgba(31,209,178,.5);background:rgba(31,209,178,.08)}
.badge--hot{color:#FFB9C6;border-color:rgba(255,77,109,.42);background:rgba(255,77,109,.1)}
.badge--accent{color:#FFD8A3;border-color:rgba(255,178,77,.42);background:rgba(255,178,77,.1)}
.chips{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px}
.chip{
  height:34px;padding:0 16px;border-radius:999px;font-size:14px;color:var(--ink-2);
  background:var(--glass);border:1px solid var(--line);cursor:pointer;transition:.2s ease;
}
.chip:hover{color:var(--ink-1);border-color:rgba(255,255,255,.22)}
.chip.is-active{color:#8DF3E2;border-color:rgba(31,209,178,.6);background:rgba(31,209,178,.1)}

/* ---------- page hero ---------- */
.page-hero{
  position:relative;overflow:hidden;
  padding:84px 0 64px;border-bottom:1px solid var(--line);
}
.page-hero::after{
  content:"";position:absolute;inset:0;
  background:url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
  opacity:.16;z-index:0;
}
.page-hero .container{position:relative;z-index:2}
.breadcrumb{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--ink-3);margin-bottom:22px}
.breadcrumb a{color:var(--ink-3);transition:color .2s ease}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb span[aria-current]{color:var(--ink-2)}
.page-hero h1{font-size:clamp(26px,3.2vw,40px);line-height:1.2;font-weight:750;margin:16px 0 14px;max-width:820px}
.hero-lead{max-width:760px;font-size:16px;color:var(--ink-2)}
.hero-meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}

/* ---------- sections ---------- */
.section{padding:88px 0;position:relative}
.section--tight{padding:72px 0}
.section-head{max-width:760px;margin-bottom:40px}
.section-head h2{font-size:clamp(22px,2.4vw,30px);line-height:1.3;font-weight:700}
.section-head p{margin-top:12px;font-size:15.5px;color:var(--ink-2)}
.eyebrow{display:inline-block;font-size:12.5px;letter-spacing:.14em;color:var(--brand);margin-bottom:12px;text-transform:uppercase}

/* ---------- 速览条 ---------- */
.facts{display:grid;grid-template-columns:repeat(3,1fr);gap:0;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:var(--glass);backdrop-filter:blur(14px) saturate(140%)}
.fact{padding:28px 26px;border-right:1px solid var(--line)}
.fact:last-child{border-right:0}
.fact-num{font-family:"SFMono-Regular",ui-monospace,Menlo,Consolas,monospace;font-size:26px;font-weight:700;color:var(--brand);letter-spacing:-.02em}
.fact h3{font-size:16px;margin:10px 0 8px;font-weight:600;color:var(--ink-1)}
.fact p{font-size:14px;color:var(--ink-2)}
.fact p + p{margin-top:6px;color:var(--ink-3);font-size:13px}

/* ---------- 图文说明 ---------- */
.split{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.split-media{border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);position:relative;box-shadow:var(--shadow-card)}
.split-media img{width:100%;aspect-ratio:16/10;object-fit:cover}
.split-media::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(11,18,32,.1),rgba(11,18,32,.55))}
.split-body h2{font-size:clamp(22px,2.4vw,30px);line-height:1.3;margin-bottom:16px}
.split-body p{font-size:15.5px;color:var(--ink-2)}
.rule-list{margin-top:26px;border-top:1px solid var(--line)}
.rule-list li{display:flex;gap:14px;padding:16px 0;border-bottom:1px solid var(--line);font-size:15px}
.rule-list i{color:var(--brand);font-size:14px;margin-top:6px}

/* ---------- 适用场景 ---------- */
.scene-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.scene{
  padding:26px 24px;border-radius:var(--radius);background:var(--glass);
  border:1px solid var(--line);transition:border-color .25s ease, transform .25s ease;
  backdrop-filter:blur(14px) saturate(140%);
}
.scene:hover{border-color:rgba(31,209,178,.45);transform:translateY(-3px)}
.scene-icon{
  width:42px;height:42px;border-radius:13px;display:inline-flex;align-items:center;justify-content:center;
  color:var(--brand);background:rgba(31,209,178,.1);border:1px solid rgba(31,209,178,.28);margin-bottom:16px;
}
.scene h3{font-size:17px;font-weight:600;margin-bottom:10px}
.scene p{font-size:14.5px;color:var(--ink-2)}
.scene-tags{display:flex;gap:8px;margin-top:16px;flex-wrap:wrap}

/* ---------- timeline ---------- */
.timeline-wrap{border-top:1px solid var(--line);padding-top:44px}
.timeline{position:relative;padding-left:34px}
.timeline::before{
  content:"";position:absolute;left:7px;top:8px;bottom:8px;width:1px;
  background:linear-gradient(180deg,rgba(31,209,178,.65),rgba(77,141,255,.35) 55%,rgba(255,255,255,.07));
}
.tl-item{position:relative;padding-bottom:40px}
.tl-item:last-child{padding-bottom:0}
.tl-item::before{
  content:"";position:absolute;left:-34px;top:7px;width:15px;height:15px;border-radius:50%;
  background:var(--bg-base);border:2px solid var(--brand);
  box-shadow:0 0 0 4px rgba(31,209,178,.12);
}
.tl-item:last-child::before{border-color:var(--brand-2);box-shadow:0 0 0 4px rgba(77,141,255,.12)}
.tl-date{
  font-family:"SFMono-Regular",ui-monospace,Menlo,Consolas,monospace;
  font-size:12.5px;color:var(--accent);letter-spacing:.04em;display:block;margin-bottom:8px;
}
.tl-item h3{font-size:19px;font-weight:600;margin-bottom:10px}
.tl-item p{font-size:15px;max-width:760px;color:var(--ink-2)}
.tl-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}

/* ---------- pager ---------- */
.pager{display:flex;align-items:center;justify-content:center;gap:10px;margin-top:52px;flex-wrap:wrap}
.pager a,.pager span{
  min-width:40px;height:40px;padding:0 14px;border-radius:12px;display:inline-flex;align-items:center;justify-content:center;
  font-size:14px;color:var(--ink-2);background:var(--glass);border:1px solid var(--line);transition:.2s ease;
}
.pager a:hover{color:var(--ink-1);border-color:rgba(31,209,178,.5)}
.pager .is-current{color:#04231E;background:linear-gradient(135deg,#1FD1B2,#1FD1B2 72%,#4D8DFF);border-color:transparent;font-weight:600}
.pager .is-disabled{opacity:.4;pointer-events:none}
.pager-note{text-align:center;font-size:13px;color:var(--ink-3);margin-top:14px}

/* ---------- faq ---------- */
.faq{max-width:800px;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:flex-start;justify-content:space-between;gap:20px;
  padding:22px 0;font-size:18px;font-weight:600;color:var(--ink-1);transition:color .2s ease;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary:hover{color:var(--brand)}
.faq summary .mark{
  flex-shrink:0;width:22px;height:22px;position:relative;margin-top:4px;
  transition:transform .25s ease;color:var(--brand);font-size:18px;line-height:1;
}
.faq summary .mark::before,.faq summary .mark::after{
  content:"";position:absolute;background:currentColor;border-radius:2px;
}
.faq summary .mark::before{left:50%;top:2px;bottom:2px;width:2px;transform:translateX(-50%)}
.faq summary .mark::after{top:50%;left:2px;right:2px;height:2px;transform:translateY(-50%)}
.faq details[open] summary .mark{transform:rotate(45deg)}
.faq .answer{padding:0 0 24px;font-size:15px;color:var(--ink-2);max-width:740px}

/* ---------- CTA ---------- */
.cta-block{
  position:relative;overflow:hidden;border-radius:24px;border:1px solid var(--line);
  background:var(--bg-elev);padding:64px 40px;text-align:center;
}
.cta-block::before{
  content:"";position:absolute;left:50%;top:-40%;width:760px;height:520px;transform:translateX(-50%);
  background:radial-gradient(closest-side,rgba(31,209,178,.13),transparent 72%);pointer-events:none;
}
.cta-block > *{position:relative;z-index:1}
.cta-block h2{font-size:clamp(24px,2.6vw,32px);line-height:1.3;margin-bottom:16px}
.cta-block p{max-width:620px;margin:0 auto 30px;font-size:15.5px}
.cta-actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}

/* ---------- footer ---------- */
.site-footer{border-top:1px solid var(--line);background:var(--bg-elev);margin-top:96px;position:relative;z-index:1}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px;padding:64px 0 44px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-desc{font-size:14px;color:var(--ink-3);max-width:320px}
.footer-tags{display:flex;gap:8px;flex-wrap:wrap;margin-top:18px}
.footer-title{font-size:14px;font-weight:600;color:var(--ink-1);margin-bottom:18px;letter-spacing:.02em}
.footer-links{display:flex;flex-direction:column;gap:12px}
.footer-links a{font-size:14px;color:var(--ink-3);transition:color .2s ease}
.footer-links a:hover{color:var(--brand)}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  border-top:1px solid var(--line);padding:22px 0 32px;font-size:13px;color:var(--ink-3);
}
.lang-switch{display:flex;gap:8px}
.lang-switch span{padding:4px 10px;border-radius:8px;border:1px solid var(--line);font-size:12.5px}
.lang-switch .on{color:var(--brand);border-color:rgba(31,209,178,.45)}

/* ---------- responsive ---------- */
@media (max-width:1024px){
  .nav-menu{
    position:fixed;left:0;right:0;top:68px;bottom:0;z-index:110;
    flex-direction:column;align-items:stretch;gap:0;margin:0;
    padding:16px 24px 140px;background:var(--bg-base);
    transform:translateY(-12px);opacity:0;visibility:hidden;transition:.25s ease;overflow-y:auto;
  }
  .nav-link{line-height:48px;font-size:17px;border-bottom:1px solid var(--line)}
  .nav-link::after{display:none}
  .nav-toggle{display:inline-flex;align-items:center;justify-content:center}
  .cmd-search,.icon-btn{display:none}
  .nav-right .btn-primary{
    position:fixed;left:24px;right:24px;bottom:24px;z-index:120;display:none;
  }
  body.nav-open{overflow:hidden}
  body.nav-open .nav-menu{transform:none;opacity:1;visibility:visible}
  body.nav-open .nav-right .btn-primary{display:inline-flex}
  .split{grid-template-columns:1fr;gap:32px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:768px){
  .section{padding:64px 0}
  .section--tight{padding:56px 0}
  .page-hero{padding:64px 0 48px}
  .facts{grid-template-columns:1fr}
  .fact{border-right:0;border-bottom:1px solid var(--line)}
  .fact:last-child{border-bottom:0}
  .scene-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .cta-block{padding:48px 24px}
  .faq summary{font-size:16.5px}
}
@media (max-width:520px){
  .container{padding:0 18px}
  .brand-word{font-size:15.5px}
  .hero-meta{gap:8px}
  .chips{gap:8px}
  .chip{height:32px;padding:0 13px;font-size:13.5px}
  .timeline{padding-left:26px}
  .tl-item::before{left:-26px}
  .pager a,.pager span{min-width:36px;height:36px;padding:0 11px}
}