/* roulang page: index */
:root{
  --base:#060B12;
  --base-deep:#03070F;
  --surface:rgba(16,28,40,.55);
  --surface-strong:rgba(18,32,46,.84);
  --primary:#2EE6C8;
  --primary-soft:rgba(46,230,200,.14);
  --secondary:#1E3AA8;
  --accent:#FF8E4D;
  --text:#EAF4F8;
  --text-2:#9DB2C4;
  --text-3:#6B8095;
  --line:rgba(146,190,214,.14);
  --line-strong:rgba(146,190,214,.28);
  --radius:18px;
  --radius-sm:14px;
  --radius-xs:12px;
  --pill:999px;
  --shadow:0 18px 40px -20px rgba(0,0,0,.7);
  --inset:inset 0 1px 0 rgba(255,255,255,.06);
  --glow:0 0 0 1px rgba(46,230,200,.5),0 0 24px -4px rgba(46,230,200,.55);
  --ease:cubic-bezier(.2,.7,.3,1);
  --tr:180ms cubic-bezier(.2,.7,.3,1);
  --section-gap:96px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background-color:var(--base);
  background-image:
    radial-gradient(900px 620px at 6% -6%, rgba(46,230,200,.10), transparent 62%),
    radial-gradient(900px 700px at 102% 104%, rgba(30,58,168,.16), transparent 64%),
    linear-gradient(rgba(146,190,214,.032) 1px, transparent 1px),
    linear-gradient(90deg, rgba(146,190,214,.032) 1px, transparent 1px);
  background-size:auto,auto,46px 46px,46px 46px;
  background-attachment:fixed;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border-radius:var(--radius-sm);}
a{color:inherit;text-decoration:none;transition:color var(--tr),border-color var(--tr),background-color var(--tr);}
button,input{font:inherit;color:inherit;}
button{background:none;border:0;cursor:pointer;}
h1,h2,h3,h4{margin:0;font-weight:600;line-height:1.3;letter-spacing:0;}
p{margin:0 0 1.2em;}
p:last-child{margin-bottom:0;}
ul{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:6px;}
::selection{background:rgba(46,230,200,.28);color:#fff;}
.num{font-variant-numeric:tabular-nums;}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
@media (min-width:1280px){.container{max-width:1280px;}}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(6,11,18,.74);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  border-bottom:1px solid var(--line);
  transition:box-shadow var(--tr),background-color var(--tr);
}
.site-header.is-scrolled{box-shadow:0 14px 34px -22px rgba(0,0,0,.9);background:rgba(5,9,15,.9);}
.nav-top{display:flex;align-items:center;justify-content:space-between;gap:18px;height:66px;}
.brand{display:inline-flex;align-items:center;gap:10px;min-width:0;}
.brand-mark{
  width:34px;height:34px;flex:0 0 34px;border-radius:11px;
  display:grid;place-items:center;
  background:linear-gradient(150deg,rgba(46,230,200,.9),rgba(30,58,168,.9));
  box-shadow:0 0 22px -6px rgba(46,230,200,.7);
}
.brand-mark svg{width:19px;height:19px;display:block;}
.brand-name{font-size:17px;font-weight:600;white-space:nowrap;letter-spacing:0;}
.nav-actions{display:flex;align-items:center;gap:12px;}
.search-pill{
  display:flex;align-items:center;gap:8px;
  height:44px;padding:0 16px;min-width:260px;
  border:1px solid var(--line);border-radius:var(--pill);
  background:var(--surface);
  transition:border-color var(--tr),box-shadow var(--tr);
}
.search-pill:focus-within{border-color:rgba(46,230,200,.6);box-shadow:0 0 0 3px rgba(46,230,200,.14);}
.search-pill svg{width:16px;height:16px;color:var(--text-3);flex:0 0 16px;}
.search-pill input{
  flex:1;border:0;background:transparent;outline:none;font-size:14px;color:var(--text);
}
.search-pill input::placeholder{color:var(--text-3);}
.search-toggle{
  display:none;width:40px;height:40px;border-radius:50%;
  border:1px solid var(--line);background:var(--surface);align-items:center;justify-content:center;
}
.search-toggle svg{width:17px;height:17px;color:var(--text-2);}
.mobile-search{display:none;padding:0 24px 14px;}
.mobile-search .search-pill{min-width:0;width:100%;}

.channels-bar{border-top:1px solid var(--line);}
.nav-channels{
  display:flex;align-items:center;gap:10px;height:52px;
  overflow-x:auto;scroll-snap-type:x proximity;
  -ms-overflow-style:none;scrollbar-width:none;
}
.nav-channels::-webkit-scrollbar{display:none;}
.channel{
  flex:0 0 auto;scroll-snap-align:start;
  display:inline-flex;align-items:center;height:34px;padding:0 16px;
  border-radius:var(--pill);border:1px solid var(--line);
  background:var(--surface);
  font-size:14px;color:var(--text-2);white-space:nowrap;
  transition:transform var(--tr),border-color var(--tr),color var(--tr),background-color var(--tr);
}
.channel:hover{transform:translateY(-1px);color:var(--text);border-color:var(--line-strong);}
.channel.is-active{
  background:var(--primary);border-color:var(--primary);color:#04201B;font-weight:600;
  box-shadow:0 0 20px -8px rgba(46,230,200,.85);
}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:40px;padding:0 22px;border-radius:var(--pill);
  font-size:14px;font-weight:500;white-space:nowrap;cursor:pointer;
  border:1px solid transparent;
  transition:transform var(--tr),box-shadow var(--tr),background-color var(--tr),border-color var(--tr),color var(--tr);
}
.btn svg{width:16px;height:16px;}
.btn-lg{height:52px;padding:0 30px;font-size:16px;}
.btn-sm{height:34px;padding:0 16px;font-size:13px;}
.btn-primary{
  background:linear-gradient(120deg,var(--primary),#4FC7F0 92%);
  color:#04201B;font-weight:600;
  box-shadow:0 12px 30px -16px rgba(46,230,200,.9);
}
.btn-primary:hover{transform:translateY(-1px);box-shadow:var(--glow);}
.btn-primary:active{transform:translateY(1px);}
.btn-ghost{
  background:var(--surface);border-color:var(--line-strong);color:var(--text);
  backdrop-filter:blur(14px) saturate(120%);
}
.btn-ghost:hover{border-color:rgba(46,230,200,.55);transform:translateY(-1px);color:var(--primary);}
.btn-ghost:active{transform:translateY(1px);}
.btn[disabled],.btn.is-disabled{opacity:.5;box-shadow:none;pointer-events:none;}
.text-link{
  color:var(--primary);font-size:14px;border-bottom:1px solid rgba(46,230,200,.35);
  padding-bottom:2px;
}
.text-link:hover{border-color:var(--primary);}

/* ---------- Pills / badges ---------- */
.pill{
  display:inline-flex;align-items:center;gap:6px;
  height:24px;padding:0 11px;border-radius:var(--pill);
  font-size:12px;line-height:1;white-space:nowrap;
  border:1px solid transparent;
}
.pill-cyan{background:rgba(46,230,200,.12);color:#6FF3DC;border-color:rgba(46,230,200,.3);}
.pill-indigo{background:rgba(30,58,168,.24);color:#A8BCF5;border-color:rgba(30,58,168,.5);}
.pill-orange{background:rgba(255,142,77,.14);color:#FFB183;border-color:rgba(255,142,77,.35);}

/* ---------- Glass ---------- */
.glass{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius);
  box-shadow:var(--shadow),var(--inset);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
}
.card-hover{transition:transform var(--tr),border-color var(--tr),box-shadow var(--tr);}
.card-hover:hover{
  transform:translateY(-3px);
  border-color:rgba(46,230,200,.35);
  box-shadow:0 24px 46px -24px rgba(0,0,0,.85),0 0 26px -12px rgba(46,230,200,.5),var(--inset);
}

/* ---------- Sections ---------- */
.section{padding:var(--section-gap) 0;scroll-margin-top:140px;}
.section-tight{padding:72px 0;scroll-margin-top:140px;}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:36px;flex-wrap:wrap;}
.section-title{font-size:clamp(22px,2.6vw,32px);line-height:1.3;}
.section-title .accent-bar{display:inline-block;width:34px;height:3px;border-radius:2px;background:var(--primary);vertical-align:middle;margin-right:12px;transform:translateY(-4px);}
.section-sub{color:var(--text-2);font-size:15px;max-width:46em;margin-top:12px;line-height:1.8;}

/* ---------- Hero ---------- */
.hero{position:relative;padding:70px 0 88px;overflow:hidden;}
.hero-grid{display:grid;grid-template-columns:5fr 7fr;gap:52px;align-items:center;}
.hero h1{font-size:clamp(28px,4.4vw,48px);line-height:1.25;}
.hero h1 em{font-style:normal;color:var(--primary);}
.hero-sub{margin-top:18px;color:var(--text-2);font-size:17px;line-height:1.85;max-width:34em;}
.hero-cta{display:flex;gap:12px;margin-top:30px;flex-wrap:wrap;}
.trust-strip{
  margin-top:32px;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));
  gap:8px;padding:16px 18px;border-radius:var(--radius-sm);
}
.trust-item .trust-label{display:block;font-size:12px;color:var(--text-3);letter-spacing:.02em;}
.trust-item .trust-value{display:block;font-size:14px;margin-top:4px;color:var(--text);font-weight:500;}
.hero-visual{position:relative;}
.device-card{position:relative;overflow:hidden;padding:12px;}
.device-card img{width:100%;aspect-ratio:16/10;object-fit:cover;}
.device-bar{display:flex;align-items:center;gap:7px;padding:0 4px 10px;}
.device-bar .dot{width:8px;height:8px;border-radius:50%;background:rgba(146,190,214,.35);}
.device-bar .dot:first-child{background:rgba(255,142,77,.7);}
.device-url{
  margin-left:8px;font-size:12px;color:var(--text-3);
  border:1px solid var(--line);border-radius:var(--pill);padding:2px 12px;height:22px;line-height:17px;
}
.hero-glow{
  position:absolute;inset:auto -10% -18% 12%;height:240px;border-radius:50%;
  background:radial-gradient(closest-side,rgba(46,230,200,.24),transparent 72%);
  filter:blur(18px);pointer-events:none;z-index:-1;
}

/* ---------- Value (asymmetric) ---------- */
.value-grid{display:grid;grid-template-columns:6fr 5fr;gap:24px;align-items:stretch;}
.value-main{padding:22px;display:flex;flex-direction:column;gap:18px;}
.value-main img{width:100%;aspect-ratio:16/10;object-fit:cover;}
.value-main h3{font-size:20px;}
.value-main p{color:var(--text-2);font-size:15px;}
.value-mini-list{display:flex;flex-direction:column;gap:14px;}
.value-mini{
  display:flex;gap:14px;align-items:flex-start;padding:18px 20px;border-radius:var(--radius-sm);
}
.value-mini .ico{
  flex:0 0 38px;width:38px;height:38px;border-radius:12px;
  display:grid;place-items:center;background:var(--primary-soft);border:1px solid rgba(46,230,200,.24);
}
.value-mini .ico svg{width:18px;height:18px;color:var(--primary);}
.value-mini h4{font-size:16px;margin-bottom:4px;}
.value-mini p{font-size:14px;color:var(--text-2);line-height:1.7;margin:0;}

/* ---------- Screenshot rail ---------- */
.rail-head{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-bottom:22px;}
.rail-nav{display:flex;gap:10px;}
.rail-btn{
  width:44px;height:44px;border-radius:50%;display:grid;place-items:center;
  border:1px solid var(--line);background:var(--surface);color:var(--text-2);
  transition:border-color var(--tr),color var(--tr),transform var(--tr);
}
.rail-btn:hover{border-color:rgba(46,230,200,.55);color:var(--primary);transform:translateY(-1px);}
.rail-btn svg{width:18px;height:18px;}
.rail-progress{height:3px;border-radius:2px;background:rgba(146,190,214,.16);overflow:hidden;margin-bottom:22px;}
.rail-progress span{display:block;height:100%;width:24%;border-radius:2px;background:linear-gradient(90deg,var(--primary),#4FC7F0);transition:width 220ms var(--ease);}
.shot-track{
  display:flex;gap:20px;overflow-x:auto;scroll-snap-type:x mandatory;
  padding-bottom:8px;margin:0 -4px;scrollbar-width:none;
}
.shot-track::-webkit-scrollbar{display:none;}
.shot{
  flex:0 0 calc((100% - 40px)/3);scroll-snap-align:start;
  padding:14px;display:flex;flex-direction:column;gap:12px;
}
.shot img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform 240ms var(--ease);}
.shot-thumb{overflow:hidden;border-radius:var(--radius-sm);}
.shot:hover img{transform:scale(1.04);}
.shot-no{font-size:12px;color:var(--primary);letter-spacing:.12em;}
.shot h4{font-size:16px;}
.shot p{font-size:14px;color:var(--text-2);line-height:1.7;margin:0;}

/* ---------- Definition list ---------- */
.spec-wrap{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px 24px;}
.spec-item{
  display:flex;gap:14px;align-items:flex-start;padding:18px 20px;
  border-radius:var(--radius-sm);border:1px solid var(--line);background:rgba(16,28,40,.4);
}
.spec-item .ico{
  flex:0 0 34px;width:34px;height:34px;border-radius:10px;display:grid;place-items:center;
  background:rgba(30,58,168,.26);border:1px solid rgba(30,58,168,.55);
}
.spec-item .ico svg{width:17px;height:17px;color:#9FC7FF;}
.spec-item dt{font-size:14px;color:var(--text-2);}
.spec-item dd{margin:4px 0 0;font-size:15px;color:var(--text);line-height:1.7;}

/* ---------- Reviews (masonry) ---------- */
.review-columns{columns:3;column-gap:20px;}
.review-card{
  break-inside:avoid;margin-bottom:20px;padding:20px;border-radius:var(--radius);
}
.review-top{display:flex;align-items:center;gap:12px;margin-bottom:12px;}
.avatar{
  width:40px;height:40px;border-radius:50%;display:grid;place-items:center;
  font-size:15px;font-weight:600;color:#04201B;
  background:linear-gradient(140deg,#2EE6C8,#4FA8F0);
}
.avatar.alt{background:linear-gradient(140deg,#8FA6FF,#1E3AA8);color:#EAF4F8;}
.avatar.alt2{background:linear-gradient(140deg,#FFB183,#FF8E4D);color:#33150A;}
.review-name{font-size:15px;font-weight:500;}
.stars{display:flex;gap:2px;margin-top:3px;}
.stars svg{width:13px;height:13px;color:var(--accent);}
.review-text{font-size:14px;color:var(--text-2);line-height:1.8;margin-bottom:14px;}

/* ---------- Download ---------- */
.dl-grid{display:grid;grid-template-columns:7fr 4fr;gap:24px;align-items:stretch;}
.dl-main{padding:32px;display:flex;flex-direction:column;gap:20px;}
.dl-main h3{font-size:22px;}
.dl-main p{color:var(--text-2);font-size:15px;}
.dl-actions{display:flex;gap:12px;flex-wrap:wrap;}
.check-row{
  display:flex;flex-wrap:wrap;gap:10px 26px;padding-top:18px;border-top:1px solid var(--line);
  font-size:13px;color:var(--text-2);
}
.check-row b{color:var(--text);font-weight:500;}
.dl-qr{padding:28px;display:flex;flex-direction:column;align-items:center;gap:16px;text-align:center;}
.qr-code{
  width:160px;height:160px;border-radius:var(--radius-xs);background-color:#EAF4F8;
  background-image:
    conic-gradient(from 0deg at 50% 50%, #070D15 0 25%, transparent 0 50%, #070D15 0 75%, transparent 0);
  background-size:16px 16px;box-shadow:0 0 24px -12px rgba(46,230,200,.7);
}
.dl-qr p{font-size:13px;color:var(--text-2);margin:0;line-height:1.7;}
.env-note{font-size:12px;color:var(--text-3);margin-top:16px;line-height:1.8;}

/* ---------- News list ---------- */
.news-filter{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:28px;}
.news-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;}
.news-card{
  display:flex;flex-direction:column;gap:12px;padding:22px;border-radius:var(--radius);
  min-height:210px;
}
.news-card h3{
  font-size:17px;line-height:1.55;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-summary{
  font-size:14px;color:var(--text-2);line-height:1.8;margin:0;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-meta{
  margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding-top:14px;border-top:1px solid var(--line);font-size:12px;color:var(--text-3);
}
.empty-state{
  grid-column:1/-1;display:flex;flex-direction:column;align-items:center;gap:14px;
  padding:56px 24px;border-radius:var(--radius);text-align:center;color:var(--text-2);
}
.empty-state svg{width:52px;height:52px;color:rgba(46,230,200,.55);}

/* ---------- FAQ ---------- */
.faq-list{display:flex;flex-direction:column;gap:12px;}
.faq-item{border-radius:var(--radius);border:1px solid var(--line);background:var(--surface);overflow:hidden;transition:border-color var(--tr);}
.faq-item[open]{border-color:rgba(46,230,200,.32);}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:20px 22px;font-size:16px;font-weight:600;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-icon{
  flex:0 0 30px;width:30px;height:30px;border-radius:50%;display:grid;place-items:center;
  border:1px solid var(--line-strong);color:var(--primary);font-size:17px;line-height:1;
  transition:transform var(--tr),border-color var(--tr);
}
.faq-item[open] .faq-icon{transform:rotate(45deg);border-color:rgba(46,230,200,.6);}
.faq-body{padding:0 22px 20px;color:var(--text-2);font-size:15px;line-height:1.85;}

/* ---------- CTA band ---------- */
.cta-band{
  padding:44px;border-radius:var(--radius);display:flex;align-items:center;justify-content:space-between;
  gap:28px;flex-wrap:wrap;position:relative;overflow:hidden;
  background:linear-gradient(120deg,rgba(30,58,168,.32),rgba(16,28,40,.55));
  border:1px solid var(--line-strong);
}
.cta-band h2{font-size:clamp(20px,2.2vw,26px);}
.cta-band p{color:var(--text-2);font-size:15px;margin-top:10px;max-width:44em;}

/* ---------- Footer ---------- */
.site-footer{
  margin-top:40px;border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(3,7,15,.6),rgba(3,7,15,.96));
}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:36px;padding:64px 0 44px;}
.footer-brand .brand{margin-bottom:16px;}
.footer-brand p{font-size:14px;color:var(--text-2);line-height:1.8;max-width:30em;}
.footer-title{font-size:14px;font-weight:600;margin-bottom:16px;color:var(--text);}
.footer-links{display:flex;flex-direction:column;gap:11px;}
.footer-links a{font-size:14px;color:var(--text-2);}
.footer-links a:hover{color:var(--primary);}
.footer-note{font-size:13px;color:var(--text-3);line-height:1.9;}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:18px;flex-wrap:wrap;
  padding:22px 0 30px;border-top:1px solid var(--line);font-size:13px;color:var(--text-3);
}
.to-top{
  display:inline-flex;align-items:center;gap:8px;height:36px;padding:0 16px;border-radius:var(--pill);
  border:1px solid var(--line);background:var(--surface);color:var(--text-2);font-size:13px;
  transition:border-color var(--tr),color var(--tr);
}
.to-top:hover{border-color:rgba(46,230,200,.55);color:var(--primary);}
.to-top svg{width:14px;height:14px;}

/* ---------- Responsive ---------- */
@media (max-width:1023px){
  :root{--section-gap:72px;}
  .hero-grid{grid-template-columns:1fr;gap:36px;}
  .hero{padding:48px 0 64px;}
  .value-grid{grid-template-columns:1fr;}
  .dl-grid{grid-template-columns:1fr;}
  .shot{flex:0 0 calc((100% - 20px)/2);}
  .review-columns{columns:2;}
  .news-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;padding:48px 0 36px;}
  .search-pill{min-width:180px;}
}
@media (max-width:767px){
  .nav-top{height:60px;gap:10px;}
  .brand-name{font-size:15px;}
  .search-pill{display:none;}
  .search-toggle{display:inline-flex;}
  .mobile-search{padding:0 16px 14px;}
  .container{padding:0 16px;}
  .spec-wrap{grid-template-columns:1fr;}
  .shot{flex:0 0 84%;}
  .review-columns{columns:1;}
  .news-grid{grid-template-columns:1fr;}
  .cta-band{padding:28px;}
  .footer-grid{grid-template-columns:1fr;gap:26px;}
  .dl-main{padding:24px;}
  .hero-cta .btn{width:100%;}
  .hero-cta{flex-direction:column;}
}
@media (max-width:520px){
  .trust-strip{grid-template-columns:1fr;gap:12px;}
  .section-head{flex-direction:column;align-items:flex-start;gap:12px;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;}
  html{scroll-behavior:auto;}
  .card-hover:hover{transform:none;box-shadow:var(--shadow),var(--inset);}
}

/* roulang page: article */
:root{
  --base:#060B12;
  --base-deep:#03070C;
  --surface:rgba(16,28,40,.55);
  --surface-strong:rgba(18,32,46,.84);
  --primary:#2EE6C8;
  --primary-deep:#12A88E;
  --secondary:#1E3AA8;
  --accent:#FF8E4D;
  --text:#EAF4F8;
  --text-2:#9DB2C4;
  --text-3:#6B8095;
  --line:rgba(146,190,214,.14);
  --line-strong:rgba(146,190,214,.28);
  --radius:18px;
  --radius-sm:12px;
  --radius-img:14px;
  --pill:999px;
  --shadow:0 18px 40px -20px rgba(0,0,0,.7);
  --glow:0 0 0 1px rgba(46,230,200,.5),0 0 24px -4px rgba(46,230,200,.55);
  --ease:cubic-bezier(.2,.7,.3,1);
  --gap-block:88px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--base);
  color:var(--text);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.75;
  font-variant-numeric:tabular-nums;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";position:fixed;inset:0;pointer-events:none;z-index:0;
  background:
    radial-gradient(720px 420px at 6% -8%, rgba(46,230,200,.10), transparent 62%),
    radial-gradient(860px 540px at 102% 108%, rgba(30,58,168,.18), transparent 62%);
}
body::after{
  content:"";position:fixed;inset:0;pointer-events:none;z-index:0;opacity:.05;
  background-image:
    linear-gradient(rgba(146,190,214,.55) 1px, transparent 1px),
    linear-gradient(90deg, rgba(146,190,214,.55) 1px, transparent 1px);
  background-size:64px 64px;
}
img{max-width:100%;display:block;border-style:none}
a{color:inherit;text-decoration:none}
button,input{font:inherit;color:inherit}
button{cursor:pointer}
h1,h2,h3,h4{margin:0;font-weight:600;letter-spacing:0;line-height:1.3}
p{margin:0}
svg{display:block}
::selection{background:rgba(46,230,200,.28);color:#fff}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px}
.container{
  width:100%;max-width:1200px;margin:0 auto;
  padding-left:24px;padding-right:24px;
  position:relative;z-index:1;
}
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(6,11,18,.72);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  border-bottom:1px solid var(--line);
  transition:background 220ms var(--ease), box-shadow 220ms var(--ease);
}
.site-header.is-scrolled{
  background:rgba(6,11,18,.92);
  box-shadow:0 14px 34px -26px rgba(0,0,0,.95);
}
.header-top{display:flex;align-items:center;gap:18px;height:64px}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;text-decoration:none}
.brand-mark{
  width:34px;height:34px;border-radius:11px;flex:0 0 auto;
  background:linear-gradient(135deg,var(--primary),#16bda2);
  display:grid;place-items:center;
  box-shadow:0 10px 22px -12px rgba(46,230,200,.95);
}
.brand-mark svg{width:20px;height:20px}
.brand-name{font-size:17px;font-weight:600;white-space:nowrap}
.header-search{
  margin-left:auto;
  display:flex;align-items:center;gap:8px;
  width:100%;max-width:340px;height:44px;
  padding:0 6px 0 16px;
  border-radius:var(--pill);
  background:var(--surface);
  border:1px solid var(--line);
  transition:border-color 180ms var(--ease), box-shadow 180ms var(--ease);
}
.header-search:focus-within{
  border-color:rgba(46,230,200,.55);
  box-shadow:0 0 0 1px rgba(46,230,200,.3), 0 0 22px -8px rgba(46,230,200,.6);
}
.header-search input{
  flex:1;min-width:0;height:100%;
  background:transparent;border:0;outline:none;font-size:14px;
}
.header-search input::placeholder{color:var(--text-3)}
.header-search button{
  width:32px;height:32px;flex:0 0 auto;border-radius:50%;border:0;
  background:rgba(46,230,200,.14);color:var(--primary);
  display:grid;place-items:center;
  transition:background 180ms var(--ease);
}
.header-search button:hover{background:rgba(46,230,200,.26)}
.header-search button svg{width:16px;height:16px}
.header-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.search-toggle{
  display:none;width:40px;height:40px;border-radius:50%;
  background:var(--surface);border:1px solid var(--line);color:var(--text-2);
  place-items:center;
  transition:all 180ms var(--ease);
}
.search-toggle:hover{color:var(--primary);border-color:rgba(46,230,200,.5)}
.search-toggle svg{width:18px;height:18px}
.nav-channels{
  display:flex;gap:10px;
  padding-top:10px;padding-bottom:12px;
  overflow-x:auto;scroll-snap-type:x proximity;
  scrollbar-width:none;-ms-overflow-style:none;
}
.nav-channels::-webkit-scrollbar{display:none}
.channel{
  flex:0 0 auto;scroll-snap-align:start;
  padding:8px 16px;border-radius:var(--pill);
  font-size:14px;color:var(--text-2);
  background:rgba(16,28,40,.5);
  border:1px solid var(--line);
  transition:all 180ms var(--ease);
}
.channel:hover{transform:translateY(-1px);color:var(--text);border-color:var(--line-strong)}
.channel.is-active{
  background:var(--primary);color:#04201B;font-weight:600;border-color:transparent;
  box-shadow:0 10px 22px -14px rgba(46,230,200,.9);
}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 22px;border-radius:var(--pill);
  font-size:15px;font-weight:600;border:1px solid transparent;
  transition:all 180ms var(--ease);white-space:nowrap;
}
.btn svg{width:16px;height:16px}
.btn-lg{height:52px;padding:0 28px;font-size:16px}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.btn-primary{
  background:linear-gradient(135deg,var(--primary),#19c9ae);
  color:#04201B;
  box-shadow:0 14px 30px -18px rgba(46,230,200,.95);
}
.btn-primary:hover{transform:translateY(-1px);filter:brightness(1.06);box-shadow:var(--glow)}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{
  background:var(--surface);border-color:var(--line-strong);color:var(--text);
}
.btn-ghost:hover{border-color:rgba(46,230,200,.55);transform:translateY(-1px)}
.btn:disabled,.btn[aria-disabled="true"]{opacity:.5;box-shadow:none;cursor:not-allowed}
.pill{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:var(--pill);
  font-size:12px;line-height:1.5;font-weight:500;
  border:1px solid transparent;
}
.pill-primary{background:rgba(46,230,200,.14);color:var(--primary);border-color:rgba(46,230,200,.28)}
.pill-secondary{background:rgba(30,58,168,.28);color:#A9BCF2;border-color:rgba(120,150,230,.26)}
.pill-accent{background:rgba(255,142,77,.14);color:var(--accent);border-color:rgba(255,142,77,.28)}
.num{font-variant-numeric:tabular-nums}
.article-hero{
  position:relative;overflow:hidden;
  padding:34px 0 40px;
  border-bottom:1px solid var(--line);
}
.article-hero .hero-bg{
  position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-1.webp');
  background-size:cover;background-position:center;
  opacity:.3;
}
.article-hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg, rgba(6,11,18,.55) 0%, rgba(6,11,18,.9) 62%, var(--base) 100%);
}
.article-hero .container{position:relative;z-index:2}
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;color:var(--text-3);margin-bottom:22px;
}
.breadcrumb a{color:var(--text-2);transition:color 180ms var(--ease)}
.breadcrumb a:hover{color:var(--primary)}
.breadcrumb .current{color:var(--text-3);max-width:60%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.hero-head{max-width:840px}
.article-hero h1{
  font-size:clamp(26px,4vw,44px);
  line-height:1.28;
  margin:16px 0 18px;
  color:#F3FAFD;
}
.meta-row{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;
  font-size:13.5px;color:var(--text-2);
}
.meta-row .dot{width:4px;height:4px;border-radius:50%;background:var(--text-3);opacity:.7}
.meta-row b{font-weight:600;color:var(--text)}
.article-section{padding-top:56px;padding-bottom:72px}
.article-layout{
  display:grid;
  grid-template-columns:minmax(0,760px) 300px;
  gap:44px;
  justify-content:center;
  align-items:start;
}
.article-main{min-width:0}
.article-body{font-size:16px;line-height:1.9;color:#D9E7EF;overflow-x:auto}
.article-body > *:first-child{margin-top:0}
.article-body p{margin:0 0 1.2em}
.article-body h2{
  position:relative;
  font-size:clamp(20px,2.2vw,26px);
  line-height:1.4;color:#F1F9FC;
  margin:2em 0 .85em;
  padding-left:15px;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.24em;bottom:.22em;width:3px;border-radius:2px;
  background:linear-gradient(180deg,var(--primary),rgba(46,230,200,.12));
}
.article-body h3{font-size:18px;font-weight:600;color:#EAF4F8;margin:1.6em 0 .7em}
.article-body h4{font-size:16px;font-weight:600;color:#EAF4F8;margin:1.4em 0 .6em}
.article-body a{color:var(--primary);text-decoration:underline;text-underline-offset:3px}
.article-body a:hover{color:#7FF3DE}
.article-body strong{color:#F4FBFD;font-weight:600}
.article-body ul{margin:0 0 1.2em;padding:0;list-style:none}
.article-body ul li{position:relative;padding-left:20px;margin:.45em 0}
.article-body ul li::before{
  content:"";position:absolute;left:2px;top:.72em;
  width:6px;height:6px;border-radius:2px;background:var(--primary);opacity:.9;
}
.article-body ol{counter-reset:item;margin:0 0 1.2em;padding:0;list-style:none}
.article-body ol li{counter-increment:item;position:relative;padding-left:36px;margin:.5em 0}
.article-body ol li::before{
  content:counter(item);
  position:absolute;left:0;top:.24em;
  width:24px;height:24px;border-radius:8px;
  display:grid;place-items:center;
  font-size:12px;font-weight:600;color:#04201B;background:var(--primary);
}
.article-body blockquote{
  margin:1.6em 0;padding:20px 22px;
  background:var(--surface);
  border:1px solid var(--line);
  border-left:3px solid var(--primary);
  border-radius:var(--radius-img);
  color:var(--text-2);
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{border-radius:var(--radius-img);margin:1.6em 0;width:100%;height:auto}
.article-body figure{margin:1.6em 0}
.article-body figcaption{font-size:12px;text-align:center;color:var(--text-3);margin-top:10px}
.article-body code{
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-size:13.5px;padding:2px 6px;border-radius:6px;
  background:rgba(46,230,200,.1);color:#8CF0DC;
}
.article-body pre{
  position:relative;
  margin:1.6em 0;padding:46px 18px 18px;
  background:#04090F;
  border:1px solid var(--line);
  border-radius:var(--radius-img);
  overflow-x:auto;font-size:13.5px;line-height:1.7;
}
.article-body pre::before{
  content:attr(data-file);
  position:absolute;top:0;left:0;right:0;
  padding:10px 16px;
  font-size:12px;color:var(--text-3);
  background:rgba(146,190,214,.06);
  border-bottom:1px solid var(--line);
}
.article-body pre code{background:transparent;padding:0;color:#B9E9DC}
.article-body table{
  width:100%;min-width:480px;border-collapse:collapse;margin:1.6em 0;
  font-size:14.5px;border:1px solid var(--line);border-radius:var(--radius-sm);
}
.article-body th{
  background:rgba(146,190,214,.08);font-weight:600;color:#EDF7FA;text-align:left;
}
.article-body th,.article-body td{padding:11px 14px;border-bottom:1px solid var(--line)}
.article-body tbody tr:nth-child(even){background:rgba(146,190,214,.04)}
.article-body hr{border:0;border-top:1px solid var(--line);margin:2.4em 0}
.article-body>*:last-child{margin-bottom:0}
.empty-state{
  text-align:center;padding:56px 24px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);
}
.empty-state svg{width:44px;height:44px;margin:0 auto 18px;color:var(--primary);opacity:.85}
.empty-title{font-size:20px;font-weight:600;color:#F1F9FC;margin-bottom:10px}
.empty-state p{color:var(--text-2);font-size:15px;max-width:38em;margin:0 auto 22px}
.article-foot{margin-top:52px}
.foot-label{font-size:13px;color:var(--text-3);margin-bottom:14px}
.next-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.next-card{
  display:flex;align-items:center;gap:14px;
  padding:18px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  transition:all 200ms var(--ease);
}
.next-card:hover{transform:translateY(-3px);border-color:rgba(46,230,200,.4);box-shadow:var(--glow)}
.next-card img{width:64px;height:52px;object-fit:cover;border-radius:var(--radius-sm);flex:0 0 auto}
.next-card span{font-size:15px;font-weight:600;color:#EDF7FA;line-height:1.5}
.next-card small{display:block;font-size:12px;color:var(--text-3);font-weight:400;margin-top:4px}
.disclaimer{
  margin-top:26px;padding:18px 20px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-img);
  font-size:12.5px;line-height:1.85;color:var(--text-3);
}
.back-row{margin-top:24px;display:flex;flex-wrap:wrap;gap:12px;align-items:center}
.side-col{display:flex;flex-direction:column;gap:18px;position:sticky;top:140px}
.side-card{
  padding:20px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);
}
.side-title{
  font-size:14px;font-weight:600;color:#EDF7FA;
  display:flex;align-items:center;gap:8px;margin-bottom:14px;
}
.side-title::before{content:"";width:3px;height:14px;border-radius:2px;background:var(--primary)}
.toc-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:2px}
.toc-list a{
  display:block;padding:7px 10px;border-radius:10px;
  font-size:13.5px;line-height:1.55;color:var(--text-2);
  transition:all 180ms var(--ease);
  border-left:2px solid transparent;
}
.toc-list a:hover{color:var(--text);background:rgba(146,190,214,.06)}
.toc-list a.is-active{
  color:#04201B;background:rgba(46,230,200,.9);border-left-color:#04201B;font-weight:600;
}
.mini-list{display:flex;flex-direction:column;gap:14px}
.mini-item{display:flex;gap:12px;align-items:flex-start}
.mini-item img{width:56px;height:46px;object-fit:cover;border-radius:10px;flex:0 0 auto}
.mini-item span{font-size:13.5px;line-height:1.6;color:var(--text-2);transition:color 180ms var(--ease)}
.mini-item:hover span{color:var(--primary)}
.tag-cloud{display:flex;flex-wrap:wrap;gap:8px}
.tag{
  padding:5px 12px;border-radius:var(--pill);font-size:12px;
  background:rgba(146,190,214,.07);border:1px solid var(--line);color:var(--text-2);
  transition:all 180ms var(--ease);
}
.tag:hover{color:var(--primary);border-color:rgba(46,230,200,.45)}
.related-band{padding-bottom:var(--gap-block)}
.band-head{
  display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:28px;
}
.band-head h2{font-size:clamp(22px,2.6vw,30px);color:#F2FAFD}
.band-head p{font-size:14px;color:var(--text-2);margin-top:8px}
.band-link{font-size:14px;color:var(--primary);text-decoration:underline;text-underline-offset:4px;white-space:nowrap}
.rel-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.rel-card{
  display:flex;flex-direction:column;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;transition:all 200ms var(--ease);
}
.rel-card:hover{transform:translateY(-3px);border-color:rgba(46,230,200,.4);box-shadow:var(--glow)}
.rel-thumb{position:relative;aspect-ratio:16/10;overflow:hidden}
.rel-thumb img{width:100%;height:100%;object-fit:cover;transition:transform 320ms var(--ease)}
.rel-card:hover .rel-thumb img{transform:scale(1.04)}
.rel-thumb::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(6,11,18,.05),rgba(6,11,18,.55))}
.rel-body{padding:18px 20px 20px;display:flex;flex-direction:column;gap:10px;flex:1}
.rel-body h3{font-size:16.5px;line-height:1.5;color:#EDF7FA}
.rel-body p{font-size:13.5px;line-height:1.7;color:var(--text-2)}
.rel-meta{margin-top:auto;display:flex;align-items:center;justify-content:space-between;font-size:12px;color:var(--text-3)}
.cta-band{
  margin-bottom:var(--gap-block);
}
.cta-inner{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:26px;
  padding:38px 40px;
  background:
    radial-gradient(520px 260px at 12% 0%, rgba(46,230,200,.16), transparent 62%),
    rgba(16,28,40,.62);
  border:1px solid var(--line-strong);
  border-radius:24px;
  box-shadow:var(--shadow);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
}
.cta-inner h2{font-size:clamp(20px,2.4vw,28px);color:#F2FAFD}
.cta-inner p{font-size:14.5px;color:var(--text-2);margin-top:10px;max-width:44em}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}
.site-footer{
  position:relative;z-index:1;
  background:var(--base-deep);
  border-top:1px solid var(--line);
  padding-top:56px;
}
.footer-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1.3fr;gap:34px;
  padding-bottom:36px;
}
.footer-brand{display:flex;flex-direction:column;gap:14px}
.footer-brand p{font-size:13.5px;line-height:1.85;color:var(--text-3);max-width:34em}
.footer-title{font-size:14px;font-weight:600;color:#EDF7FA;margin-bottom:14px}
.footer-links{display:flex;flex-direction:column;gap:10px}
.footer-links a{font-size:13.5px;color:var(--text-2);transition:color 180ms var(--ease)}
.footer-links a:hover{color:var(--primary)}
.footer-note{font-size:13px;line-height:1.9;color:var(--text-3)}
.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px;
  padding:20px 0 26px;
  border-top:1px solid var(--line);
  font-size:12.5px;color:var(--text-3);
}
.to-top{
  display:inline-flex;align-items:center;gap:8px;
  height:38px;padding:0 16px;border-radius:var(--pill);
  background:var(--surface);border:1px solid var(--line);color:var(--text-2);
  font-size:13px;transition:all 180ms var(--ease);
}
.to-top svg{width:15px;height:15px}
.to-top:hover{color:var(--primary);border-color:rgba(46,230,200,.5);transform:translateY(-1px)}
@media (max-width:1023px){
  :root{--gap-block:64px}
  .article-layout{grid-template-columns:minmax(0,1fr);gap:34px}
  .side-col{position:static}
  .rel-grid{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .cta-inner{padding:30px 26px}
}
@media (max-width:639px){
  :root{--gap-block:56px}
  .container{padding-left:16px;padding-right:16px}
  .header-top{height:60px;gap:12px}
  .brand-name{font-size:15.5px}
  .header-search{display:none}
  .header-search.is-open{
    display:flex;position:absolute;left:12px;right:12px;top:calc(100% + 8px);
    max-width:none;z-index:70;
    background:rgba(8,15,23,.98);
    box-shadow:0 22px 44px -26px rgba(0,0,0,.95);
  }
  .search-toggle{display:grid}
  .header-actions{margin-left:auto}
  .nav-channels{padding-top:8px;padding-bottom:10px;gap:8px}
  .article-hero{padding:26px 0 32px}
  .breadcrumb .current{max-width:44%}
  .article-section{padding-top:40px;padding-bottom:52px}
  .next-grid{grid-template-columns:1fr}
  .band-head{flex-direction:column;align-items:flex-start}
  .rel-grid{grid-template-columns:1fr}
  .cta-inner{padding:26px 20px;border-radius:20px}
  .cta-actions .btn{width:100%}
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .article-body{font-size:15.5px}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.01ms !important;transition-duration:.01ms !important;scroll-behavior:auto !important}
}

/* roulang page: category1 */
:root{
  --base:#060B12;
  --surface:rgba(16,28,40,.55);
  --surface-solid:#0C1621;
  --primary:#2EE6C8;
  --primary-deep:#04201B;
  --secondary:#1E3AA8;
  --accent:#FF8E4D;
  --text:#EAF4F8;
  --text-2:#9DB2C4;
  --text-3:#6B8095;
  --line:rgba(146,190,214,.14);
  --line-strong:rgba(146,190,214,.28);
  --radius:18px;
  --radius-img:14px;
  --shadow:0 18px 40px -20px rgba(0,0,0,.7);
  --inner:inset 0 1px 0 rgba(255,255,255,.06);
  --glow:0 0 0 1px rgba(46,230,200,.5),0 0 24px -4px rgba(46,230,200,.55);
  --tr:180ms cubic-bezier(.2,.7,.3,1);
  --gap-section:96px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--base);
  color:var(--text);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  font-variant-numeric:tabular-nums;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  background-image:
    radial-gradient(620px 420px at 10% 6%,rgba(46,230,200,.10),transparent 70%),
    radial-gradient(720px 520px at 90% 88%,rgba(30,58,168,.14),transparent 72%);
}
body::after{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  opacity:.045;
  background-image:
    linear-gradient(to right,rgba(146,190,214,.6) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(146,190,214,.6) 1px,transparent 1px);
  background-size:56px 56px;
}
img{max-width:100%;display:block;border-radius:var(--radius-img)}
a{color:inherit;text-decoration:none;transition:color var(--tr),border-color var(--tr),background var(--tr),transform var(--tr)}
button{font-family:inherit}
h1,h2,h3,h4{margin:0;font-weight:600;letter-spacing:0;line-height:1.3}
h1{font-size:clamp(28px,4.4vw,46px);line-height:1.25}
h2{font-size:clamp(22px,2.6vw,32px)}
h3{font-size:19px}
h4{font-size:16px}
p{margin:0 0 1.2em}
p:last-child{margin-bottom:0}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:6px}
::selection{background:rgba(46,230,200,.3)}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
main{position:relative;z-index:1}
@media (min-width:1280px){.container{max-width:1280px}}
@media (max-width:640px){.container{padding:0 16px}}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:52px;padding:0 26px;border-radius:999px;
  font-size:15px;font-weight:600;line-height:1;
  border:1px solid transparent;cursor:pointer;
  transition:transform var(--tr),box-shadow var(--tr),background var(--tr),border-color var(--tr),color var(--tr);
  white-space:nowrap;
}
.btn svg{width:18px;height:18px;flex:0 0 auto}
.btn-primary{
  background:linear-gradient(135deg,#2EE6C8 0%,#25C9CE 55%,#1F7FD6 130%);
  color:var(--primary-deep);
  box-shadow:0 10px 30px -14px rgba(46,230,200,.6),var(--inner);
}
.btn-primary:hover{transform:translateY(-1px);box-shadow:var(--glow),0 14px 34px -16px rgba(46,230,200,.7)}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{
  background:var(--surface);
  border-color:var(--line-strong);
  color:var(--text);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  box-shadow:var(--inner);
}
.btn-ghost:hover{border-color:rgba(46,230,200,.6);transform:translateY(-1px);color:#fff}
.btn-ghost:active{transform:translateY(1px)}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.btn-link{
  display:inline-flex;align-items:center;gap:6px;color:var(--primary);font-weight:600;font-size:15px;
  border-bottom:1px solid rgba(46,230,200,.35);padding-bottom:2px;
}
.btn-link:hover{border-bottom-color:var(--primary);color:#7BF3DE}
.btn:disabled,.btn[disabled]{opacity:.5;pointer-events:none;box-shadow:none}

/* ---------- 头部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(6,11,18,.72);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  border-bottom:1px solid transparent;
  transition:background var(--tr),border-color var(--tr),box-shadow var(--tr);
}
.site-header.is-scrolled{
  background:rgba(6,11,18,.92);
  border-bottom-color:var(--line);
  box-shadow:0 12px 30px -22px rgba(0,0,0,.95);
}
.header-top{display:flex;align-items:center;gap:16px;height:60px}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{
  width:34px;height:34px;border-radius:11px;
  display:inline-flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,#2EE6C8,#1E9AD8);
  box-shadow:0 8px 22px -12px rgba(46,230,200,.85);
}
.brand-mark svg{width:20px;height:20px}
.brand-name{font-size:17px;font-weight:600;color:var(--text);letter-spacing:0}
.search-pill{
  flex:1 1 auto;max-width:400px;margin-left:auto;
  display:flex;align-items:center;gap:6px;
  height:44px;padding:0 6px 0 16px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:999px;
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  transition:border-color var(--tr),box-shadow var(--tr);
}
.search-pill:focus-within{border-color:rgba(46,230,200,.65);box-shadow:0 0 0 3px rgba(46,230,200,.12)}
.search-pill input{
  flex:1 1 auto;min-width:0;height:100%;
  background:none;border:0;outline:none;
  color:var(--text);font-size:14px;font-family:inherit;
}
.search-pill input::placeholder{color:var(--text-3)}
.search-pill button{
  width:34px;height:34px;flex:0 0 auto;border:0;border-radius:999px;
  background:linear-gradient(135deg,#2EE6C8,#1E9AD8);
  color:var(--primary-deep);cursor:pointer;display:inline-flex;align-items:center;justify-content:center;
  transition:transform var(--tr),box-shadow var(--tr);
}
.search-pill button:hover{transform:translateY(-1px);box-shadow:var(--glow)}
.search-pill button svg{width:16px;height:16px}
.header-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.icon-btn{
  width:40px;height:40px;border-radius:999px;
  display:none;align-items:center;justify-content:center;
  background:var(--surface);border:1px solid var(--line);color:var(--text-2);cursor:pointer;
  transition:var(--tr);
}
.icon-btn:hover{color:var(--text);border-color:var(--line-strong)}
.icon-btn svg{width:18px;height:18px}

.nav-bar{border-top:1px solid var(--line);position:relative}
.nav-channels{
  display:flex;align-items:center;gap:10px;
  padding-top:9px;padding-bottom:11px;
  overflow-x:auto;scrollbar-width:none;-ms-overflow-style:none;
  scroll-snap-type:x proximity;
}
.nav-channels::-webkit-scrollbar{display:none}
.channel{
  flex:0 0 auto;scroll-snap-align:start;
  display:inline-flex;align-items:center;height:34px;padding:0 16px;
  border-radius:999px;border:1px solid var(--line);
  background:rgba(16,28,40,.4);
  color:var(--text-2);font-size:14px;font-weight:500;
}
.channel:hover{color:var(--text);border-color:var(--line-strong);transform:translateY(-1px);background:rgba(16,28,40,.72)}
.channel.is-active{
  background:var(--primary);color:var(--primary-deep);
  border-color:transparent;font-weight:600;
  box-shadow:0 10px 26px -16px rgba(46,230,200,.9);
}
.nav-fade{display:none}
.mobile-search{
  display:none;border-top:1px solid var(--line);
  padding:10px 0 14px;
}
.mobile-search.is-open{display:block}
.mobile-search form{display:flex;gap:8px;align-items:center}
.mobile-search input{
  flex:1 1 auto;height:44px;border-radius:12px;
  background:var(--surface);border:1px solid var(--line);
  color:var(--text);font-size:14px;font-family:inherit;padding:0 14px;outline:none;
}
.mobile-search input::placeholder{color:var(--text-3)}
.mobile-search input:focus{border-color:rgba(46,230,200,.65);box-shadow:0 0 0 3px rgba(46,230,200,.12)}

/* ---------- 面包屑 ---------- */
.crumbs{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;color:var(--text-2);padding:20px 0 0;
}
.crumbs a{color:var(--text-2)}
.crumbs a:hover{color:var(--primary)}
.crumbs .sep{color:var(--text-3)}
.crumbs .current{color:var(--text)}

/* ---------- 矮 Hero ---------- */
.hero-mini{position:relative;overflow:hidden;border-bottom:1px solid var(--line);margin-top:16px}
.hero-mini-bg{
  position:absolute;inset:0;
  background-image:url(/assets/images/backpic/back-1.webp);
  background-size:cover;background-position:center;
}
.hero-mini-bg::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(6,11,18,.95) 0%,rgba(6,11,18,.84) 42%,rgba(16,28,40,.55) 100%);
}
.hero-mini-inner{position:relative;z-index:1;padding:56px 0 52px;min-height:264px;display:flex;flex-direction:column;justify-content:center}
.hero-tag{
  display:inline-flex;align-items:center;gap:8px;
  height:28px;padding:0 14px;border-radius:999px;
  background:rgba(46,230,200,.12);
  border:1px solid rgba(46,230,200,.34);
  color:#7BF3DE;font-size:12px;font-weight:600;
  width:max-content;margin-bottom:18px;
}
.hero-mini h1{max-width:20em;letter-spacing:-.4px}
.hero-mini .hero-sub{
  margin-top:16px;max-width:44em;
  color:var(--text-2);font-size:16px;line-height:1.8;
}
.hero-meta{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
.hero-meta span{
  display:inline-flex;align-items:center;gap:8px;
  height:36px;padding:0 14px;border-radius:999px;
  background:var(--surface);border:1px solid var(--line);
  font-size:13px;color:var(--text-2);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
}
.hero-meta b{color:var(--text);font-weight:600}

/* ---------- 通用板块 ---------- */
.section{padding-top:var(--gap-section);scroll-margin-top:140px}
.section-head{max-width:44em;margin-bottom:36px}
.section-head .eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;font-weight:600;letter-spacing:.08em;
  color:var(--primary);text-transform:uppercase;margin-bottom:12px;
}
.section-head h2{margin-bottom:14px}
.section-head p{color:var(--text-2);font-size:15px;line-height:1.8}

/* ---------- 导语区 ---------- */
.lead-grid{display:grid;grid-template-columns:minmax(0,1.45fr) minmax(0,1fr);gap:36px;align-items:start}
.lead-copy{max-width:42em}
.lead-copy p{color:var(--text-2);font-size:16.5px;line-height:1.9}
.lead-copy p strong{color:var(--text);font-weight:600}
.fact-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:26px 24px;box-shadow:var(--shadow),var(--inner);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
}
.fact-card h3{font-size:16px;margin-bottom:6px}
.fact-card .fact-note{font-size:13px;color:var(--text-3);margin-bottom:20px}
.fact-row{
  display:flex;align-items:baseline;justify-content:space-between;gap:16px;
  padding:12px 0;border-bottom:1px dashed var(--line);
}
.fact-row:last-child{border-bottom:0;padding-bottom:0}
.fact-row span{font-size:13px;color:var(--text-2)}
.fact-row b{font-size:15px;font-weight:600;color:var(--text);font-variant-numeric:tabular-nums}
.fact-row b.cyan{color:var(--primary)}

/* ---------- 图文分节 ---------- */
.feature-row{
  display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);
  gap:48px;align-items:center;
  padding:30px 0;
}
.feature-row + .feature-row{border-top:1px solid var(--line)}
.feature-media{position:relative}
.feature-media img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:var(--radius-img);border:1px solid var(--line)}
.feature-media .media-glow{
  position:absolute;inset:auto -10% -18% 12%;height:60%;z-index:-1;
  background:radial-gradient(closest-side,rgba(46,230,200,.28),transparent);
  filter:blur(28px);
}
.feature-body h3{margin-bottom:6px}
.feature-body .feature-kicker{
  display:inline-flex;align-items:center;gap:8px;font-size:12px;font-weight:600;
  color:var(--primary);letter-spacing:.06em;margin-bottom:12px;
}
.feature-body p{color:var(--text-2);font-size:16px;line-height:1.9}
.feature-body p strong{color:var(--text);font-weight:600}
.feature-row.reverse .feature-media{order:2}
.feature-row.reverse .feature-body{order:1}
.feature-strip{
  display:flex;flex-wrap:wrap;gap:10px;margin-top:18px;
}
.pill{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:999px;
  font-size:12px;font-weight:600;border:1px solid transparent;
}
.pill-cyan{background:rgba(46,230,200,.14);color:#7BF3DE;border-color:rgba(46,230,200,.3)}
.pill-indigo{background:rgba(30,58,168,.24);color:#A9BCF5;border-color:rgba(30,58,168,.5)}
.pill-orange{background:rgba(255,142,77,.14);color:#FFB489;border-color:rgba(255,142,77,.32)}

/* ---------- 折叠说明 ---------- */
.accordion{display:grid;gap:14px;max-width:56em}
.acc-item{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow),var(--inner);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  overflow:hidden;transition:border-color var(--tr),box-shadow var(--tr);
}
.acc-item:hover{border-color:var(--line-strong)}
.acc-item[open]{border-color:rgba(46,230,200,.42)}
.acc-item summary{
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:20px 24px;cursor:pointer;list-style:none;
  font-size:16px;font-weight:600;color:var(--text);
}
.acc-item summary::-webkit-details-marker{display:none}
.acc-icon{
  flex:0 0 auto;width:30px;height:30px;border-radius:999px;
  display:inline-flex;align-items:center;justify-content:center;
  background:rgba(46,230,200,.12);border:1px solid rgba(46,230,200,.3);
  color:var(--primary);font-size:16px;line-height:1;
  transition:transform var(--tr),background var(--tr);
}
.acc-item[open] .acc-icon{transform:rotate(45deg);background:rgba(46,230,200,.2)}
.acc-body{padding:0 24px 22px;color:var(--text-2);font-size:15.5px;line-height:1.9;animation:accIn 220ms cubic-bezier(.2,.7,.3,1)}
@keyframes accIn{from{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:none}}

/* ---------- 要点清单 ---------- */
.checklist{
  display:grid;grid-template-columns:repeat(2,minmax(0,1fr));
  gap:14px 26px;
}
.check-item{
  display:flex;gap:12px;align-items:flex-start;
  padding:16px 18px;border-radius:14px;
  background:rgba(16,28,40,.42);
  border:1px solid var(--line);
  transition:border-color var(--tr),transform var(--tr),background var(--tr);
}
.check-item:hover{border-color:rgba(46,230,200,.4);transform:translateY(-3px);background:rgba(16,28,40,.62)}
.check-mark{
  flex:0 0 auto;width:24px;height:24px;border-radius:999px;margin-top:2px;
  display:inline-flex;align-items:center;justify-content:center;
  background:rgba(46,230,200,.14);border:1px solid rgba(46,230,200,.4);color:var(--primary);
}
.check-mark svg{width:13px;height:13px}
.check-item p{margin:0;font-size:15px;line-height:1.75;color:var(--text-2)}
.check-item p b{display:block;color:var(--text);font-weight:600;font-size:15px;margin-bottom:2px}

/* ---------- FAQ ---------- */
.faq-list{display:grid;gap:12px;max-width:56em}
.faq-item{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow),var(--inner);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  transition:border-color var(--tr);
}
.faq-item:hover{border-color:var(--line-strong)}
.faq-item[open]{border-color:rgba(46,230,200,.42)}
.faq-item summary{
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:20px 24px;cursor:pointer;list-style:none;
  font-size:16px;font-weight:600;color:var(--text);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-q-mark{color:var(--primary);font-weight:600;margin-right:6px}
.faq-icon{
  flex:0 0 auto;width:30px;height:30px;border-radius:999px;
  display:inline-flex;align-items:center;justify-content:center;
  background:rgba(46,230,200,.1);border:1px solid var(--line-strong);
  color:var(--primary);font-size:16px;line-height:1;transition:transform var(--tr);
}
.faq-item[open] .faq-icon{transform:rotate(45deg)}
.faq-body{padding:0 24px 22px;color:var(--text-2);font-size:15.5px;line-height:1.9;animation:accIn 220ms cubic-bezier(.2,.7,.3,1)}

/* ---------- CTA ---------- */
.cta-band{padding-top:var(--gap-section)}
.cta-card{
  position:relative;overflow:hidden;
  border-radius:24px;border:1px solid var(--line-strong);
  background:linear-gradient(120deg,rgba(16,28,40,.86),rgba(12,22,34,.7));
  padding:52px 48px;
  box-shadow:var(--shadow),var(--inner);
}
.cta-card::before{
  content:"";position:absolute;inset:-40% -20% auto auto;width:60%;height:180%;
  background:radial-gradient(closest-side,rgba(46,230,200,.2),transparent);
  filter:blur(10px);pointer-events:none;
}
.cta-inner{position:relative;z-index:1;display:flex;flex-wrap:wrap;gap:32px;align-items:center;justify-content:space-between}
.cta-copy{max-width:34em}
.cta-copy h2{margin-bottom:12px}
.cta-copy p{color:var(--text-2);font-size:15.5px;line-height:1.85;margin:0}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}

/* ---------- 页脚 ---------- */
.site-footer{
  margin-top:var(--gap-section);
  background:#040910;
  border-top:1px solid var(--line);
  position:relative;z-index:1;
}
.footer-grid{
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1.3fr;
  gap:36px;padding:56px 0 40px;
}
.footer-brand .brand{margin-bottom:14px}
.footer-brand p{color:var(--text-2);font-size:14px;line-height:1.85;max-width:30em;margin:0}
.footer-title{font-size:14px;font-weight:600;color:var(--text);margin-bottom:16px}
.footer-links{display:grid;gap:10px}
.footer-links a{font-size:14px;color:var(--text-2)}
.footer-links a:hover{color:var(--primary)}
.footer-note{font-size:13px;color:var(--text-3);line-height:1.9}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:16px;align-items:center;justify-content:space-between;
  padding:20px 0 30px;border-top:1px solid var(--line);
  font-size:13px;color:var(--text-3);
}
.to-top{
  display:inline-flex;align-items:center;gap:8px;
  height:38px;padding:0 16px;border-radius:999px;
  background:var(--surface);border:1px solid var(--line);color:var(--text-2);
  cursor:pointer;font-size:13px;transition:var(--tr);
}
.to-top:hover{color:var(--text);border-color:rgba(46,230,200,.5)}
.to-top svg{width:15px;height:15px}

/* ---------- 响应式 ---------- */
@media (max-width:1023px){
  :root{--gap-section:72px}
  .nav-fade{display:block;position:absolute;top:0;bottom:0;width:34px;pointer-events:none;z-index:2}
  .nav-fade.left{left:0;background:linear-gradient(to right,rgba(6,11,18,.95),transparent)}
  .nav-fade.right{right:0;background:linear-gradient(to left,rgba(6,11,18,.95),transparent)}
  .lead-grid{grid-template-columns:minmax(0,1fr)}
  .feature-row{grid-template-columns:minmax(0,1fr);gap:26px}
  .feature-row.reverse .feature-media{order:0}
  .feature-row.reverse .feature-body{order:0}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;gap:28px}
  .footer-grid > :last-child{grid-column:1 / -1}
  .cta-card{padding:44px 32px}
}
@media (max-width:767px){
  .search-pill{display:none}
  .icon-btn{display:inline-flex}
  .header-top{height:56px;gap:12px}
  .nav-channels{gap:8px;padding-top:8px;padding-bottom:10px}
  .checklist{grid-template-columns:minmax(0,1fr)}
  .hero-mini-inner{padding:44px 0 40px;min-height:236px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:26px;padding:44px 0 32px}
  .footer-brand{grid-column:1 / -1}
  .footer-grid > :last-child{grid-column:1 / -1}
  .cta-card{padding:34px 22px;border-radius:20px}
  .cta-actions .btn{flex:1 1 auto}
}
@media (max-width:519px){
  :root{--gap-section:56px}
  h1{font-size:clamp(26px,7.4vw,32px)}
  .brand-name{font-size:15px}
  .hero-mini h1{max-width:100%}
  .acc-item summary,.faq-item summary{padding:18px 18px;font-size:15.5px}
  .acc-body,.faq-body{padding:0 18px 20px}
  .lead-copy p{font-size:16px}
  .footer-grid{grid-template-columns:1fr}
  .btn{width:100%}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;transition-duration:.001ms !important}
  html{scroll-behavior:auto}
  .check-item:hover,.channel:hover,.btn:hover{transform:none;box-shadow:none}
}

/* roulang page: category2 */
:root{
  --base:#060B12;
  --base-deep:#04080E;
  --surface:rgba(16,28,40,.55);
  --surface-solid:#0C1622;
  --primary:#2EE6C8;
  --primary-deep:#17B79E;
  --secondary:#1E3AA8;
  --accent:#FF8E4D;
  --text:#EAF4F8;
  --text-2:#9DB2C4;
  --text-3:#6B8095;
  --line:rgba(146,190,214,.14);
  --line-strong:rgba(146,190,214,.28);
  --radius:18px;
  --radius-sm:14px;
  --radius-pill:999px;
  --shadow:0 18px 40px -20px rgba(0,0,0,.7);
  --glow:0 0 0 1px rgba(46,230,200,.5),0 0 24px -4px rgba(46,230,200,.55);
  --ease:180ms cubic-bezier(.2,.7,.3,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background-color:var(--base);
  color:var(--text);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.75;
  font-variant-numeric:tabular-nums;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background:
    radial-gradient(760px 520px at 8% -6%,rgba(46,230,200,.10),transparent 68%),
    radial-gradient(820px 620px at 100% 106%,rgba(30,58,168,.14),transparent 70%),
    repeating-linear-gradient(0deg,rgba(146,190,214,.035) 0 1px,transparent 1px 66px),
    repeating-linear-gradient(90deg,rgba(146,190,214,.035) 0 1px,transparent 1px 66px);
}
img{max-width:100%;display:block;border-radius:var(--radius-sm)}
a{color:inherit;text-decoration:none;transition:color var(--ease),border-color var(--ease),background-color var(--ease)}
a:hover{color:var(--primary)}
button,input{font:inherit;color:inherit}
button{cursor:pointer;border:0;background:none}
svg{display:block}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:8px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;position:relative;z-index:1}

/* ============ header ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(6,11,18,.74);
  backdrop-filter:blur(14px) saturate(120%);
  border-bottom:1px solid var(--line);
  transition:box-shadow var(--ease),background-color var(--ease);
}
.site-header.is-scrolled{box-shadow:0 14px 34px -24px rgba(0,0,0,.95);background:rgba(6,11,18,.9)}
.nav-top{display:flex;align-items:center;justify-content:space-between;gap:20px;height:66px}
.brand{display:inline-flex;align-items:center;gap:10px;font-weight:600;font-size:17px;letter-spacing:0}
.brand:hover{color:var(--text)}
.brand-mark{
  width:34px;height:34px;flex:0 0 34px;border-radius:11px;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(140deg,var(--primary),#8FF7E4);
  box-shadow:0 0 22px -6px rgba(46,230,200,.6),inset 0 1px 0 rgba(255,255,255,.5);
}
.brand-mark svg{width:20px;height:20px}
.brand-name{white-space:nowrap}
.nav-tools{display:flex;align-items:center;gap:12px}
.search-pill{
  display:flex;align-items:center;gap:8px;
  height:40px;padding:0 14px;min-width:236px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-pill);
  transition:border-color var(--ease),box-shadow var(--ease);
}
.search-pill:focus-within{border-color:rgba(46,230,200,.6);box-shadow:0 0 0 3px rgba(46,230,200,.12)}
.search-pill svg{width:16px;height:16px;stroke:var(--text-3);flex:0 0 16px}
.search-pill input{width:100%;border:0;background:transparent;font-size:14px;line-height:1.4;outline:none}
.search-pill input::placeholder{color:var(--text-3)}
.icon-btn{
  display:none;width:40px;height:40px;border-radius:50%;
  align-items:center;justify-content:center;
  background:var(--surface);border:1px solid var(--line);
}
.icon-btn svg{width:18px;height:18px;stroke:var(--text-2)}
.icon-btn:hover{border-color:rgba(46,230,200,.5)}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:52px;padding:0 26px;border-radius:var(--radius-pill);
  font-size:15px;font-weight:600;white-space:nowrap;
  transition:transform var(--ease),box-shadow var(--ease),background-color var(--ease),border-color var(--ease),color var(--ease);
}
.btn svg{width:16px;height:16px}
.btn-primary{
  background:linear-gradient(120deg,var(--primary),#59EFD4 55%,#2EE6C8);
  color:#04201B;
  box-shadow:0 12px 30px -16px rgba(46,230,200,.9),inset 0 1px 0 rgba(255,255,255,.45);
}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 0 0 1px rgba(46,230,200,.5),0 0 26px -4px rgba(46,230,200,.6);color:#04201B}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{
  background:var(--surface);border:1px solid var(--line-strong);color:var(--text);
}
.btn-ghost:hover{border-color:rgba(46,230,200,.6);color:var(--text);transform:translateY(-1px);box-shadow:0 0 22px -8px rgba(46,230,200,.5)}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.btn-lg{height:52px}

.nav-channels{
  display:flex;align-items:center;gap:10px;
  padding:10px 24px 12px;
  overflow-x:auto;
  scroll-snap-type:x proximity;
  scrollbar-width:none;
  -webkit-overflow-scrolling:touch;
  max-width:1200px;
}
.nav-channels::-webkit-scrollbar{display:none}
.channel{
  flex:0 0 auto;
  scroll-snap-align:start;
  display:inline-flex;align-items:center;
  height:36px;padding:0 16px;
  border-radius:var(--radius-pill);
  font-size:14px;font-weight:500;color:var(--text-2);
  background:var(--surface);border:1px solid var(--line);
  transition:transform var(--ease),color var(--ease),border-color var(--ease),background-color var(--ease);
}
.channel:hover{transform:translateY(-1px);color:var(--text);border-color:rgba(46,230,200,.45)}
.channel.is-active{
  background:var(--primary);border-color:var(--primary);color:#04201B;font-weight:600;
  box-shadow:0 0 20px -6px rgba(46,230,200,.7);
}
.channel.is-active:hover{color:#04201B}

/* ============ hero（镜像版式：左图右文） ============ */
.cat-hero{
  position:relative;
  border-bottom:1px solid var(--line);
  background-image:linear-gradient(100deg,rgba(6,11,18,.94) 0%,rgba(6,11,18,.82) 46%,rgba(6,11,18,.9) 100%),url('/assets/images/backpic/back-3.png');
  background-size:cover;
  background-position:center;
}
.cat-hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(560px 320px at 88% 20%,rgba(30,58,168,.30),transparent 72%);
}
.cat-hero .container{position:relative;z-index:2}
.hero-grid{
  display:grid;
  grid-template-columns:minmax(0,.92fr) minmax(0,1.08fr);
  align-items:end;
  gap:44px;
  min-height:300px;
  padding:38px 0 40px;
}
.hero-visual{position:relative}
.hero-visual img{
  width:100%;height:222px;object-fit:cover;border-radius:var(--radius);
  border:1px solid var(--line-strong);
  box-shadow:var(--shadow);
}
.hero-visual .glowline{
  position:absolute;left:18px;right:18px;bottom:-12px;height:16px;border-radius:50%;
  background:radial-gradient(closest-side,rgba(46,230,200,.45),transparent 75%);
  filter:blur(6px);
}
.hero-copy{text-align:right;display:flex;flex-direction:column;align-items:flex-end}
.crumbs{
  display:flex;align-items:center;gap:8px;justify-content:flex-end;
  font-size:13px;color:var(--text-3);margin-bottom:14px;
}
.crumbs a{color:var(--text-3)}
.crumbs a:hover{color:var(--primary)}
.crumbs .sep{opacity:.6}
.crumbs .now{color:var(--text-2)}
.hero-copy h1{
  margin:0 0 12px;
  font-size:clamp(27px,3.3vw,40px);
  line-height:1.28;font-weight:600;letter-spacing:0;
  max-width:22em;
}
.hero-copy h1 em{font-style:normal;color:var(--primary)}
.hero-copy p{margin:0;color:var(--text-2);font-size:15.5px;max-width:34em;line-height:1.8}
.hero-tags{display:flex;flex-wrap:wrap;gap:8px;justify-content:flex-end;margin-top:18px}
.tag{
  display:inline-flex;align-items:center;height:28px;padding:0 12px;
  font-size:12px;border-radius:var(--radius-pill);
  background:rgba(46,230,200,.10);border:1px solid rgba(46,230,200,.28);color:#9FF3E2;
}
.tag.tag-blue{background:rgba(30,58,168,.22);border-color:rgba(120,150,255,.28);color:#B9C8FF}
.tag.tag-orange{background:rgba(255,142,77,.12);border-color:rgba(255,142,77,.32);color:#FFC39C}

/* ============ 通用板块 ============ */
.section{padding:78px 0}
.section--tight{padding:58px 0}
.section-head{max-width:44em;margin-bottom:34px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:.12em;color:var(--primary);text-transform:uppercase;margin-bottom:12px;
}
.eyebrow::before{content:"";width:22px;height:1px;background:linear-gradient(90deg,transparent,var(--primary))}
h2{margin:0 0 12px;font-size:clamp(21px,2.4vw,29px);line-height:1.34;font-weight:600}
.lead{margin:0;color:var(--text-2);font-size:16px;line-height:1.85}
.muted{color:var(--text-3);font-size:14px}

/* 导语条 */
.intro-bar{
  display:grid;grid-template-columns:auto 1fr;gap:20px;align-items:flex-start;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:24px 26px;box-shadow:var(--shadow);
  backdrop-filter:blur(14px) saturate(120%);
}
.intro-bar .quote-icon{
  width:42px;height:42px;flex:0 0 42px;border-radius:13px;
  display:flex;align-items:center;justify-content:center;
  background:rgba(46,230,200,.12);border:1px solid rgba(46,230,200,.3);
}
.intro-bar .quote-icon svg{width:20px;height:20px;stroke:var(--primary)}
.intro-bar p{margin:0;color:var(--text);font-size:16.5px;line-height:1.85}

/* ============ 时间线 ============ */
.timeline{position:relative;padding-left:38px;margin-top:8px}
.timeline::before{
  content:"";position:absolute;left:11px;top:10px;bottom:12px;width:2px;
  background:linear-gradient(180deg,rgba(46,230,200,.75),rgba(30,58,168,.5) 62%,rgba(146,190,214,.08));
  border-radius:2px;
}
.tl-item{position:relative;padding-bottom:22px}
.tl-item:last-child{padding-bottom:0}
.tl-item::before{
  content:"";position:absolute;left:-33px;top:20px;width:12px;height:12px;border-radius:50%;
  background:var(--primary);box-shadow:0 0 0 4px rgba(46,230,200,.16),0 0 18px -2px rgba(46,230,200,.8);
}
.tl-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:20px 22px;backdrop-filter:blur(14px) saturate(120%);
  box-shadow:var(--shadow),inset 0 1px 0 rgba(255,255,255,.06);
  transition:transform var(--ease),border-color var(--ease),box-shadow var(--ease);
}
.tl-card:hover{transform:translateY(-3px);border-color:rgba(46,230,200,.35);box-shadow:var(--glow),var(--shadow)}
.tl-head{display:flex;align-items:center;gap:12px;margin-bottom:8px;flex-wrap:wrap}
.tl-num{
  font-size:13px;font-weight:600;color:#04201B;background:var(--primary);
  height:24px;min-width:34px;padding:0 10px;border-radius:var(--radius-pill);
  display:inline-flex;align-items:center;justify-content:center;
}
.tl-card h3{margin:0;font-size:18px;font-weight:600}
.tl-card p{margin:0;color:var(--text-2);font-size:15px;line-height:1.8}
.tl-note{
  margin-top:10px;display:inline-flex;align-items:center;gap:6px;
  font-size:12px;color:var(--text-3);
}
.tl-note svg{width:13px;height:13px;stroke:var(--text-3)}

/* ============ 场景卡片网格 ============ */
.scene-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}
.scene-card{
  position:relative;overflow:hidden;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:24px;backdrop-filter:blur(14px) saturate(120%);
  box-shadow:var(--shadow);
  transition:transform var(--ease),border-color var(--ease),box-shadow var(--ease);
  display:flex;flex-direction:column;gap:14px;
}
.scene-card:hover{transform:translateY(-3px);border-color:rgba(46,230,200,.35);box-shadow:var(--glow),var(--shadow)}
.scene-card h3{margin:0;font-size:18px;font-weight:600;line-height:1.45}
.scene-card p{margin:0;color:var(--text-2);font-size:15px;line-height:1.8}
.scene-card ul{margin:0;padding:0;list-style:none;display:flex;flex-direction:column;gap:8px}
.scene-card li{position:relative;padding-left:20px;font-size:14.5px;color:var(--text-2);line-height:1.7}
.scene-card li::before{
  content:"";position:absolute;left:0;top:9px;width:7px;height:7px;border-radius:2px;
  background:var(--primary);opacity:.85;
}
.scene-top{display:flex;align-items:center;justify-content:space-between;gap:12px}
.scene-icon{
  width:40px;height:40px;border-radius:12px;flex:0 0 40px;
  display:flex;align-items:center;justify-content:center;
  background:rgba(30,58,168,.24);border:1px solid rgba(120,150,255,.24);
}
.scene-icon svg{width:19px;height:19px;stroke:#B9C8FF}
.scene-card--tall{padding-bottom:34px}
.scene-card--short{gap:10px}
.scene-figure{margin:0;border-radius:var(--radius-sm);overflow:hidden;border:1px solid var(--line)}
.scene-figure img{height:150px;width:100%;object-fit:cover;border-radius:0;transition:transform 420ms cubic-bezier(.2,.7,.3,1)}
.scene-card:hover .scene-figure img{transform:scale(1.04)}

/* ============ FAQ 卡片 ============ */
.faq-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}
.faq-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:22px 24px;backdrop-filter:blur(14px) saturate(120%);
  box-shadow:var(--shadow);
  transition:border-color var(--ease),transform var(--ease),box-shadow var(--ease);
}
.faq-card:hover{border-color:rgba(46,230,200,.35);transform:translateY(-2px)}
.faq-card h3{
  margin:0 0 10px;font-size:16.5px;font-weight:600;line-height:1.6;
  display:flex;gap:10px;align-items:flex-start;
}
.faq-card h3 span{
  flex:0 0 22px;width:22px;height:22px;border-radius:7px;margin-top:2px;
  display:inline-flex;align-items:center;justify-content:center;
  font-size:12px;font-weight:600;color:#04201B;background:var(--primary);
}
.faq-card p{margin:0;color:var(--text-2);font-size:15px;line-height:1.82}

/* ============ CTA ============ */
.cta-band{
  position:relative;overflow:hidden;
  border-radius:22px;border:1px solid var(--line-strong);
  background-image:linear-gradient(110deg,rgba(6,11,18,.9),rgba(9,20,34,.86)),url('/assets/images/backpic/back-1.webp');
  background-size:cover;background-position:center;
  padding:40px 38px;
  display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;
  box-shadow:var(--shadow);
}
.cta-band::after{
  content:"";position:absolute;right:-60px;top:-80px;width:320px;height:320px;border-radius:50%;
  background:radial-gradient(closest-side,rgba(46,230,200,.30),transparent 72%);
  pointer-events:none;
}
.cta-band h2{margin:0 0 10px;font-size:clamp(20px,2.2vw,26px)}
.cta-band p{margin:0;color:var(--text-2);font-size:15px;max-width:38em}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap;position:relative;z-index:2}

/* ============ footer ============ */
.site-footer{
  margin-top:20px;
  background:var(--base-deep);
  border-top:1px solid var(--line);
  padding:56px 0 26px;
  position:relative;z-index:1;
}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:34px}
.footer-brand p{margin:14px 0 0;color:var(--text-3);font-size:14px;line-height:1.85;max-width:32em}
.footer-title{font-size:14px;font-weight:600;color:var(--text);margin-bottom:14px}
.footer-links{display:flex;flex-direction:column;gap:10px}
.footer-links a{color:var(--text-2);font-size:14px}
.footer-links a:hover{color:var(--primary)}
.footer-note{color:var(--text-3);font-size:13.5px;line-height:1.95}
.footer-bottom{
  margin-top:40px;padding-top:20px;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  color:var(--text-3);font-size:13px;
}
.to-top{
  display:inline-flex;align-items:center;gap:8px;height:36px;padding:0 14px;
  border-radius:var(--radius-pill);background:var(--surface);border:1px solid var(--line);
  color:var(--text-2);font-size:13px;transition:border-color var(--ease),color var(--ease),transform var(--ease);
}
.to-top svg{width:14px;height:14px}
.to-top:hover{color:var(--primary);border-color:rgba(46,230,200,.5);transform:translateY(-1px)}

/* ============ 响应式 ============ */
@media (max-width:1023px){
  .container{padding:0 20px}
  .nav-channels{padding:10px 20px 12px}
  .hero-grid{grid-template-columns:1fr;gap:26px;min-height:0;padding:30px 0 36px}
  .hero-visual{order:2}
  .hero-visual img{height:186px}
  .hero-copy{order:1;text-align:left;align-items:flex-start}
  .crumbs{justify-content:flex-start}
  .hero-tags{justify-content:flex-start}
  .section{padding:58px 0}
  .scene-grid,.faq-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
}
@media (max-width:767px){
  .nav-top{height:60px;gap:12px}
  .search-pill{display:none}
  .icon-btn{display:inline-flex}
  .site-header.search-open .search-pill{
    display:flex;position:absolute;left:16px;right:16px;top:62px;min-width:0;z-index:70;
  }
  .site-header.search-open .nav-top{padding-bottom:0}
  .brand-name{font-size:15px}
  .btn-sm{height:36px;padding:0 14px;font-size:13px}
  .nav-channels{
    gap:8px;padding:10px 16px 12px;
    -webkit-mask-image:linear-gradient(90deg,transparent 0,#000 18px,#000 calc(100% - 18px),transparent 100%);
    mask-image:linear-gradient(90deg,transparent 0,#000 18px,#000 calc(100% - 18px),transparent 100%);
  }
  .channel{height:34px;padding:0 14px;font-size:13px}
  .section{padding:46px 0}
  .section--tight{padding:38px 0}
  .intro-bar{grid-template-columns:1fr;gap:14px;padding:20px}
  .timeline{padding-left:28px}
  .timeline::before{left:7px}
  .tl-item::before{left:-26px;width:10px;height:10px}
  .tl-card{padding:18px}
  .cta-band{padding:28px 22px;border-radius:18px}
  .cta-actions{width:100%}
  .cta-actions .btn{flex:1 1 auto}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important;scroll-behavior:auto!important}
  .btn-primary:hover,.btn-ghost:hover,.scene-card:hover,.tl-card:hover,.faq-card:hover{transform:none;box-shadow:var(--shadow)}
}