/* roulang page: index */
:root{
  --ink-900:#07080B; --ink-800:#0C0E12; --ink-700:#14171D; --ink-600:#1D222A;
  --line:rgba(255,255,255,.08); --line-strong:rgba(255,255,255,.16);
  --neon:#23E6C0; --neon-dim:rgba(35,230,192,.16); --violet:#8B5CF6; --star:#FFC24B;
  --text-hi:#F2F6F5; --text-mid:#A8B3B7; --text-low:#6C777C;
  --panel-r:20px; --card-r:14px; --btn-r:10px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
html,body{overflow-x:hidden}
body{
  margin:0;background:var(--ink-900);color:var(--text-mid);
  font-family:'PingFang SC','HarmonyOS Sans SC','Microsoft YaHei','Source Han Sans SC',system-ui,sans-serif;
  font-size:16px;line-height:1.8;-webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
ul{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
:focus-visible{outline:2px solid var(--neon);outline-offset:2px;border-radius:6px}
.num{font-family:'Barlow','Inter',system-ui,sans-serif;font-variant-numeric:tabular-nums}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
@media (min-width:768px){.container{padding:0 32px}}
.section{padding:64px 0}
@media (min-width:768px){.section{padding:96px 0}}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:60;background:rgba(7,8,11,.72);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);transition:box-shadow .3s ease}
.site-header::after{content:"";position:absolute;left:0;right:0;bottom:0;height:1px;background:linear-gradient(90deg,transparent 0%,var(--neon) 50%,transparent 100%);opacity:0;transition:opacity .3s ease}
.site-header.scrolled::after{opacity:.85}
.site-header.scrolled{box-shadow:0 18px 40px -30px rgba(0,0,0,.9)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;height:60px;transition:height .3s ease}
@media (min-width:1024px){.header-inner{height:68px}.site-header.scrolled .header-inner{height:60px}}
.brand{display:flex;align-items:center;gap:10px;min-height:44px}
.brand-mark{width:34px;height:34px;flex:0 0 34px;border-radius:10px;background:linear-gradient(145deg,rgba(35,230,192,.22),rgba(139,92,246,.18));border:1px solid rgba(35,230,192,.45);display:flex;align-items:center;justify-content:center}
.brand-mark svg{width:18px;height:18px}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-name{font-size:15px;font-weight:700;color:var(--text-hi);letter-spacing:.01em}
.brand-sub{font-size:10px;letter-spacing:.18em;color:var(--text-low);text-transform:uppercase}
.nav-desktop{display:none}
@media (min-width:1024px){.nav-desktop{display:flex;align-items:center;gap:30px;height:100%}}
.nav-link{position:relative;display:inline-flex;align-items:center;height:100%;font-size:15px;color:var(--text-mid);transition:color .2s ease}
.nav-link::after{content:"";position:absolute;left:0;bottom:16px;height:2px;width:0;background:var(--neon);border-radius:2px;transition:width .2s ease}
.nav-link:hover{color:var(--neon)}
.nav-link:hover::after{width:100%}
.nav-link.active{color:var(--text-hi);text-shadow:0 0 8px rgba(35,230,192,.45)}
.nav-link.active::after{width:22px;box-shadow:0 0 10px rgba(35,230,192,.6)}
.header-cta{display:none}
@media (min-width:1024px){.header-cta{display:inline-flex}}
.burger{display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;border-radius:10px;border:1px solid var(--line-strong);color:var(--text-hi)}
.burger:hover{border-color:var(--neon);color:var(--neon)}
@media (min-width:1024px){.burger{display:none}}

/* drawer */
.drawer{position:fixed;inset:0;z-index:80;background:rgba(7,8,11,.97);backdrop-filter:blur(14px);transform:translateX(100%);transition:transform .32s ease;display:flex;flex-direction:column;padding:18px 20px 28px}
.drawer.open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;height:56px}
.drawer-close{width:44px;height:44px;border-radius:10px;border:1px solid rgba(35,230,192,.4);color:var(--neon);display:flex;align-items:center;justify-content:center;font-size:20px}
.drawer-nav{margin-top:20px;display:flex;flex-direction:column}
.drawer-item{display:flex;align-items:center;height:48px;font-size:17px;color:var(--text-mid);border-bottom:1px solid var(--line);opacity:0;transform:translateY(8px)}
.drawer.open .drawer-item{animation:drawerIn .4s ease forwards}
.drawer.open .drawer-item:nth-child(1){animation-delay:.03s}
.drawer.open .drawer-item:nth-child(2){animation-delay:.06s}
.drawer.open .drawer-item:nth-child(3){animation-delay:.09s}
@keyframes drawerIn{to{opacity:1;transform:translateY(0)}}
.drawer-item.active{color:var(--neon)}
.drawer-foot{margin-top:auto;display:flex;flex-direction:column;gap:12px}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:0 22px;border-radius:var(--btn-r);font-size:15px;font-weight:600;transition:transform .2s ease,box-shadow .25s ease,background .2s ease,border-color .2s ease,color .2s ease}
.btn:active{transform:scale(.98)}
.btn-primary{background:var(--neon);color:#07080B;box-shadow:0 0 0 1px rgba(35,230,192,.45)}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 0 24px -6px rgba(35,230,192,.7)}
.btn-ghost{background:transparent;border:1px solid var(--line-strong);color:var(--text-hi)}
.btn-ghost:hover{border-color:var(--neon);color:var(--neon);transform:translateY(-1px)}
.btn-dark{background:var(--ink-900);color:var(--neon);box-shadow:0 0 0 1px rgba(7,8,11,.35)}
.btn-dark:hover{transform:translateY(-1px);box-shadow:0 0 22px -8px rgba(7,8,11,.6)}
.btn-outline-dark{background:transparent;border:1px solid rgba(12,14,18,.28);color:#0C0E12}
.btn-outline-dark:hover{border-color:#0C0E12;transform:translateY(-1px)}
.btn-sm{min-height:40px;padding:0 16px;font-size:14px}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--neon)}
.link-arrow span.ar{transition:transform .2s ease;display:inline-block}
.link-arrow:hover span.ar{transform:translateX(4px)}
.link-plain{color:var(--neon);border-bottom:1px solid rgba(35,230,192,.35)}
.link-plain:hover{border-color:var(--neon)}

/* ---------- shared bits ---------- */
.badge{display:inline-flex;align-items:center;height:28px;padding:0 12px;border-radius:999px;font-size:13px;line-height:1;background:var(--neon-dim);color:var(--neon);white-space:nowrap}
.badge-plain{background:rgba(255,255,255,.04);color:var(--text-mid);border:1px solid var(--line)}
.badge-violet{background:rgba(139,92,246,.16);color:#B69BFF}
.card{background:var(--ink-700);border:1px solid var(--line);border-radius:var(--card-r);padding:24px;transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease}
.card:hover{transform:translateY(-4px);border-color:rgba(35,230,192,.7);box-shadow:0 0 0 1px var(--line),0 12px 40px -12px rgba(35,230,192,.35)}
.section-title{display:flex;align-items:center;gap:12px;font-size:28px;font-weight:700;color:var(--text-hi);letter-spacing:-.01em;line-height:1.25}
@media (min-width:768px){.section-title{font-size:32px}}
.section-title::before{content:"";width:4px;height:26px;border-radius:2px;background:var(--neon);box-shadow:0 0 14px rgba(35,230,192,.55);flex:0 0 4px}
.section-index{display:block;font-family:'Barlow',sans-serif;font-size:13px;letter-spacing:.18em;color:var(--neon);margin-bottom:10px}
.section-lead{margin-top:14px;font-size:15px;line-height:1.8;color:var(--text-mid);max-width:640px}
.grid-line{height:1px;background:var(--line);border:0;margin:0}

/* ---------- hero ---------- */
.hero{position:relative;padding:72px 0 56px;overflow:hidden;background:var(--ink-900)}
@media (min-width:768px){.hero{padding:96px 0 76px}}
.hero::before{content:"";position:absolute;top:-280px;left:56%;transform:translateX(-50%);width:25%;height:520px;background:radial-gradient(circle,rgba(35,230,192,.16),transparent 70%);filter:blur(24px);pointer-events:none}
.hero::after{content:"";position:absolute;inset:0;pointer-events:none;opacity:.035;background-image:linear-gradient(rgba(255,255,255,.6) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.6) 1px,transparent 1px);background-size:40px 40px}
.hero-inner{position:relative;z-index:2}
.hero h1{font-size:clamp(2rem,8vw,2.6rem);line-height:1.2;font-weight:800;letter-spacing:-.02em;color:var(--text-hi)}
@media (min-width:768px){.hero h1{font-size:clamp(2.4rem,5vw,3.3rem);max-width:15em}}
.hero-sub{margin-top:18px;font-size:16px;line-height:1.8;color:var(--text-mid);max-width:32em}
.hero-badges{margin-top:26px;display:flex;flex-wrap:wrap;gap:10px}
.hero-visual{position:relative;margin-top:40px}
@media (min-width:1024px){.hero-visual{margin-top:0}}
.hero-shot{position:relative;border-radius:var(--panel);overflow:hidden;border:1px solid var(--line-strong);box-shadow:0 0 0 1px var(--line),0 30px 70px -40px rgba(0,0,0,.95)}
.hero-shot img{width:100%;aspect-ratio:16/10;object-fit:cover}
.hero-shot::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(7,8,11,0) 40%,rgba(7,8,11,.85) 100%)}
.hero-glow{position:absolute;right:-6%;top:12%;width:46%;height:70%;background:radial-gradient(circle,rgba(35,230,192,.18),transparent 70%);filter:blur(30px);z-index:-1}
.hero-note{margin-top:14px;font-size:12px;letter-spacing:.12em;color:var(--text-low)}

/* ---------- feature asymmetric ---------- */
.feature-card{position:relative}
.feature-num{font-family:'Barlow',sans-serif;font-size:13px;letter-spacing:.2em;color:var(--neon)}
.feature-icon{width:44px;height:44px;border-radius:12px;border:1px solid var(--line-strong);display:flex;align-items:center;justify-content:center;margin:16px 0 18px;color:var(--neon)}
.feature-card h3{font-size:19px;font-weight:600;color:var(--text-hi);line-height:1.4}
.feature-card p{margin-top:10px;font-size:14px;line-height:1.7;color:var(--text-mid)}
@media (min-width:768px){
  .offset-card{margin-top:24px}
}

/* ---------- carousel ---------- */
.snap-wrap{position:relative;margin-top:36px}
.snap-track{display:flex;gap:24px;overflow-x:auto;scroll-snap-type:x mandatory;scrollbar-width:none;padding:4px 0 8px}
.snap-track::-webkit-scrollbar{display:none}
.snap-card{flex:0 0 78%;scroll-snap-align:start;border-radius:var(--card-r);overflow:hidden;border:1px solid var(--line);background:var(--ink-700);transition:border-color .25s ease,transform .25s ease}
.snap-card:hover{border-color:rgba(35,230,192,.7);transform:translateY(-4px)}
.snap-card img{width:100%;aspect-ratio:16/9;object-fit:cover}
@media (min-width:640px){.snap-card{flex:0 0 56%}}
@media (min-width:1024px){.snap-card{flex:0 0 32%}}
.snap-cap{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:16px 18px}
.snap-cap strong{font-size:15px;font-weight:600;color:var(--text-hi)}
.snap-cap em{font-style:normal;font-size:12px;color:var(--text-low)}
.carousel-ctrl{display:flex;align-items:center;gap:14px;margin-top:18px}
.ctrl-btn{width:44px;height:44px;border-radius:10px;border:1px solid var(--line-strong);color:var(--text-hi);display:inline-flex;align-items:center;justify-content:center;transition:.2s ease}
.ctrl-btn:hover{background:var(--neon);border-color:var(--neon);color:#07080B}
.dots{display:flex;align-items:center;gap:8px}
.dot{width:8px;height:8px;border-radius:999px;background:rgba(255,255,255,.18);transition:.25s ease}
.dot.active{width:24px;background:var(--neon)}
.progress{position:relative;flex:1;height:2px;background:rgba(255,255,255,.1);border-radius:2px;overflow:hidden;max-width:220px}
.progress i{position:absolute;left:0;top:0;bottom:0;width:0;background:var(--neon);animation:barFill 5s linear infinite}
@keyframes barFill{from{width:0}to{width:100%}}
.snap-wrap:hover .progress i,.snap-wrap:focus-within .progress i{animation-play-state:paused}

/* ---------- requirements ---------- */
.def-card{background:var(--ink-800);border:1px solid var(--line);border-radius:var(--panel);padding:26px}
.def-card h3{font-size:18px;font-weight:600;color:var(--text-hi);margin-bottom:10px}
.def-row{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:13px 0;border-bottom:1px solid var(--line);font-size:14px}
.def-row:last-child{border-bottom:0}
.def-row dt{color:var(--text-mid)}
.def-row dd{margin:0;color:var(--text-hi);font-weight:600}
.compat-card{background:var(--ink-700);border:1px solid var(--line);border-radius:var(--panel);padding:24px}
.compat-item{display:flex;gap:12px;align-items:flex-start;padding:12px 0;border-bottom:1px solid var(--line)}
.compat-item:last-child{border-bottom:0}
.compat-check{flex:0 0 20px;width:20px;height:20px;border-radius:6px;background:var(--neon-dim);color:var(--neon);display:flex;align-items:center;justify-content:center;font-size:12px;margin-top:4px}
.compat-item p{font-size:14px;line-height:1.7;color:var(--text-mid)}

/* ---------- reviews ---------- */
.score{display:flex;align-items:center;gap:10px}
.stars{color:var(--star);letter-spacing:2px;font-size:15px}
.review-card .review-head{display:flex;align-items:center;gap:12px}
.avatar{width:44px;height:44px;flex:0 0 44px;border-radius:50%;background:var(--ink-600);border:1px solid var(--line-strong);display:flex;align-items:center;justify-content:center;color:var(--neon);font-weight:700}
.review-card .nick{font-size:15px;font-weight:600;color:var(--text-hi)}
.review-card .src{font-size:12px;color:var(--text-low)}
.review-card p{margin-top:16px;font-size:14px;line-height:1.7;color:var(--text-mid)}
.review-card .time{margin-top:16px;font-size:12px;color:var(--text-low)}

/* ---------- download panel ---------- */
.dl-panel{background:#F2F6F5;color:#0C0E12;border-radius:var(--panel);padding:32px 24px;box-shadow:0 0 0 1px rgba(35,230,192,.5),0 30px 70px -50px rgba(35,230,192,.6)}
@media (min-width:768px){.dl-panel{padding:48px 44px}}
.dl-panel h2{font-size:26px;font-weight:700;color:#07080B;letter-spacing:-.01em}
@media (min-width:768px){.dl-panel h2{font-size:32px}}
.dl-panel .dl-sub{margin-top:12px;font-size:15px;line-height:1.8;color:#3D474A;max-width:46em}
.dl-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
.dl-actions .btn{flex:0 0 auto}
@media (max-width:639px){.dl-actions .btn{width:100%}}
.qr-box{width:120px;height:120px;border-radius:14px;background:#07080B;display:flex;align-items:center;justify-content:center;flex:0 0 120px}
.qr-box svg{width:92px;height:92px}
.dl-note{margin-top:22px;font-size:12px;color:#5A6467;letter-spacing:.02em}
.dl-side{display:flex;align-items:center;gap:20px;margin-top:30px}
@media (min-width:1024px){.dl-side{margin-top:0;flex-direction:column;align-items:flex-end;gap:12px}.dl-side .qr-cap{font-size:12px;color:#5A6467;text-align:right}}

/* ---------- cms list ---------- */
.cms-grid{display:grid;gap:24px;grid-template-columns:1fr;margin-top:34px}
@media (min-width:640px){.cms-grid{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.cms-grid{grid-template-columns:repeat(3,1fr)}}
.cms-card{display:flex;flex-direction:column;padding:0;overflow:hidden}
.cms-thumb{display:block;overflow:hidden}
.cms-thumb img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .4s ease}
.cms-card:hover .cms-thumb img{transform:scale(1.03)}
.cms-body{padding:20px 22px 22px;display:flex;flex-direction:column;flex:1}
.cms-title{margin-top:12px;font-size:17px;font-weight:600;color:var(--text-hi);line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.cms-title a:hover{color:var(--neon)}
.cms-sum{margin-top:10px;font-size:14px;line-height:1.7;color:var(--text-mid);display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.cms-meta{margin-top:auto;padding-top:18px;display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:12px;color:var(--text-low)}
@media (min-width:1024px){
  .cms-card.is-wide{grid-column:span 2;flex-direction:row;align-items:stretch}
  .cms-card.is-wide .cms-thumb{flex:0 0 46%;display:flex}
  .cms-card.is-wide .cms-thumb img{height:100%;aspect-ratio:auto}
  .cms-card.is-wide .cms-body{justify-content:center}
  .cms-card.is-wide .cms-title{font-size:20px}
}
.cms-empty{border:1px dashed var(--line-strong);border-radius:var(--panel);min-height:180px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;margin-top:34px;color:var(--text-mid);font-size:15px}
.cms-empty span.ico{width:44px;height:44px;border-radius:12px;border:1px solid var(--line-strong);display:flex;align-items:center;justify-content:center;color:var(--neon)}

/* ---------- faq ---------- */
.faq{max-width:820px;margin:34px auto 0}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:64px;padding:8px 0;text-align:left;font-size:16px;font-weight:600;color:var(--text-hi)}
.faq-q:hover{color:var(--neon)}
.faq-icon{flex:0 0 22px;position:relative;width:22px;height:22px;transition:transform .25s ease}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;background:var(--neon);border-radius:2px}
.faq-icon::before{left:0;top:10px;width:22px;height:2px}
.faq-icon::after{left:10px;top:0;width:2px;height:22px;transition:opacity .2s ease}
.faq-item.open .faq-icon{transform:rotate(180deg)}
.faq-item.open .faq-icon::after{opacity:0}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease}
.faq-a p{padding:0 40px 20px 0;font-size:15px;line-height:1.85;color:var(--text-mid)}
.faq-item.open .faq-a{max-height:300px}

/* ---------- cta strip ---------- */
.cta-strip{position:relative;border-radius:var(--panel);padding:36px 28px;background:var(--ink-800);border:1px solid transparent;background-image:linear-gradient(var(--ink-800),var(--ink-800)),linear-gradient(120deg,rgba(35,230,192,.7),rgba(139,92,246,.5),rgba(35,230,192,.15));background-origin:border-box;background-clip:padding-box,border-box}
@media (min-width:768px){.cta-strip{padding:44px 40px}}
.cta-strip h2{font-size:24px;font-weight:700;color:var(--text-hi);line-height:1.3}
@media (min-width:768px){.cta-strip h2{font-size:28px}}

/* ---------- footer ---------- */
.site-footer{border-top:1px solid var(--line);background:var(--ink-800);padding:56px 0 28px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1fr;gap:28px}
@media (min-width:640px){.footer-grid{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1.4fr;gap:0}}
.footer-col{padding:0}
@media (min-width:1024px){.footer-col{padding:0 28px;border-right:1px solid var(--line)}.footer-col:first-child{padding-left:0}.footer-col:last-child{border-right:0;padding-right:0}}
.footer-col h3{font-size:14px;font-weight:600;color:var(--text-hi);letter-spacing:.04em;margin-bottom:16px}
.footer-col p{font-size:14px;line-height:1.8;color:var(--text-mid)}
.footer-col li{margin-bottom:10px}
.footer-col li a{font-size:14px;color:var(--text-mid);transition:color .2s ease}
.footer-col li a:hover{color:var(--neon)}
.sub-form{margin-top:6px;display:flex;flex-direction:column;gap:12px}
.sub-form label{font-size:13px;color:var(--text-low)}
.sub-form input{width:100%;min-height:48px;padding:0 16px;border-radius:10px;background:var(--ink-600);border:1px solid var(--line);color:var(--text-hi);font-size:15px;transition:border-color .2s ease,box-shadow .2s ease}
.sub-form input::placeholder{color:var(--text-low)}
.sub-form input:focus{outline:none;border-color:var(--neon);box-shadow:0 0 0 3px rgba(35,230,192,.16)}
.footer-bottom{margin-top:44px;padding-top:22px;border-top:1px solid var(--line);display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;font-size:13px;color:var(--text-low)}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .5s ease,transform .5s ease}
.reveal.in{opacity:1;transform:translateY(0)}
@media (prefers-reduced-motion: reduce){
  .reveal{opacity:1;transform:none;transition:none}
  html{scroll-behavior:auto}
  .progress i{animation:none;width:100%}
  .snap-track{scroll-behavior:auto}
  *{animation-duration:.001ms !important;animation-iteration-count:1 !important}
}

/* roulang page: article */
:root{
    --ink-900:#07080B;
    --ink-800:#0C0E12;
    --ink-700:#14171D;
    --ink-600:#1D222A;
    --line:rgba(255,255,255,0.08);
    --line-strong:rgba(255,255,255,0.16);
    --neon:#23E6C0;
    --neon-dim:rgba(35,230,192,0.16);
    --violet:#8B5CF6;
    --star:#FFC24B;
    --text-hi:#F2F6F5;
    --text-mid:#A8B3B7;
    --text-low:#6C777C;
    --r-panel:20px;
    --r-card:14px;
    --r-btn:10px;
    --r-img:12px;
    --shadow-card:0 0 0 1px var(--line), 0 18px 40px -24px rgba(0,0,0,.9);
    --shadow-neon:0 0 0 1px var(--neon), 0 12px 40px -12px rgba(35,230,192,.35);
  }

  *,*::before,*::after{box-sizing:border-box}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
  body{
    margin:0;
    background:var(--ink-900);
    color:var(--text-mid);
    font-family:'PingFang SC','HarmonyOS Sans SC','Microsoft YaHei','Source Han Sans SC',system-ui,sans-serif;
    font-size:16px;
    line-height:1.8;
    -webkit-font-smoothing:antialiased;
    overflow-x:hidden;
  }
  img{max-width:100%;display:block}
  a{color:inherit;text-decoration:none}
  button{font:inherit;color:inherit;border:0;background:none;cursor:pointer}
  input{font:inherit}
  ul,ol{margin:0;padding:0;list-style:none}
  h1,h2,h3,h4,p{margin:0}
  .num{font-family:'Barlow',Inter,system-ui,sans-serif;font-variant-numeric:tabular-nums}

  .container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
  @media(min-width:768px){.container{padding:0 32px}}

  ::selection{background:var(--neon-dim);color:var(--text-hi)}
  :focus-visible{outline:2px solid var(--neon);outline-offset:2px;border-radius:6px}

  /* ---------- 背景纹理 ---------- */
  .page-bg{position:fixed;inset:0;pointer-events:none;z-index:0}
  .page-bg::before{
    content:"";position:absolute;top:-160px;left:50%;transform:translateX(-50%);
    width:520px;height:520px;border-radius:50%;
    background:radial-gradient(circle,rgba(35,230,192,.28),rgba(35,230,192,0) 68%);
    opacity:.5;filter:blur(10px);
  }
  .page-bg::after{
    content:"";position:absolute;inset:0;
    background-image:linear-gradient(rgba(255,255,255,.06) 1px,transparent 1px),
                     linear-gradient(90deg,rgba(255,255,255,.06) 1px,transparent 1px);
    background-size:40px 40px;
    opacity:.035;
  }

  /* ---------- 头部导航 ---------- */
  .site-header{
    position:sticky;top:0;z-index:60;
    background:rgba(7,8,11,.72);
    backdrop-filter:blur(12px);
    -webkit-backdrop-filter:blur(12px);
  }
  .site-header::after{
    content:"";position:absolute;left:0;right:0;bottom:0;height:1px;
    background:linear-gradient(90deg,transparent,var(--neon),transparent);
    opacity:0;transition:opacity .3s ease;
  }
  .site-header.scrolled::after{opacity:.85}
  .header-inner{
    display:flex;align-items:center;gap:20px;
    height:60px;transition:height .3s ease;
  }
  @media(min-width:1024px){.header-inner{height:68px}}
  .site-header.scrolled .header-inner{height:58px}

  .brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
  .brand-mark{
    width:34px;height:34px;border-radius:10px;display:grid;place-items:center;
    background:var(--neon-dim);box-shadow:0 0 0 1px rgba(35,230,192,.35) inset;
  }
  .brand-mark svg{width:20px;height:20px}
  .brand-text{display:flex;flex-direction:column;line-height:1.15}
  .brand-name{color:var(--text-hi);font-size:15px;font-weight:700;letter-spacing:-.01em}
  .brand-sub{
    font-family:'Barlow',Inter,sans-serif;font-size:10px;letter-spacing:.18em;
    text-transform:uppercase;color:var(--text-low)
  }
  @media(min-width:1024px){.brand-name{font-size:16px}}

  .nav-desktop{display:none;align-items:center;gap:6px;margin-left:auto}
  @media(min-width:1024px){.nav-desktop{display:flex}}
  .nav-link{
    position:relative;display:inline-flex;align-items:center;height:44px;
    padding:0 14px;font-size:14.5px;color:var(--text-mid);
    border-radius:10px;transition:color .2s ease;
  }
  .nav-link::after{
    content:"";position:absolute;left:14px;right:14px;bottom:6px;height:2px;
    background:var(--neon);border-radius:2px;transform:scaleX(0);transform-origin:left;
    transition:transform .2s ease;
  }
  .nav-link:hover{color:var(--neon)}
  .nav-link:hover::after{transform:scaleX(1)}
  .nav-link.active{
    color:var(--text-hi);font-weight:600;
    text-shadow:0 0 8px rgba(35,230,192,.55);
  }
  .nav-link.active::after{transform:scaleX(1)}

  .header-cta{margin-left:auto}
  @media(min-width:1024px){.header-cta{margin-left:12px}}
  @media(max-width:639px){.header-cta{display:none}}

  .burger{
    margin-left:auto;width:44px;height:44px;border-radius:10px;
    display:grid;place-items:center;color:var(--text-hi);
    border:1px solid var(--line);transition:border-color .2s ease,color .2s ease;
  }
  .burger:hover{border-color:var(--neon);color:var(--neon)}
  @media(min-width:1024px){.burger{display:none}}

  /* ---------- 按钮 ---------- */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    min-height:44px;padding:0 22px;border-radius:var(--r-btn);
    font-size:15px;font-weight:600;letter-spacing:.01em;
    transition:transform .18s ease,box-shadow .22s ease,background .22s ease,color .22s ease,border-color .22s ease;
    white-space:nowrap;
  }
  .btn:active{transform:scale(.98)}
  .btn-primary{
    background:var(--neon);color:var(--ink-900);
    box-shadow:0 10px 30px -14px rgba(35,230,192,.6);
  }
  .btn-primary:hover{
    background:#4ff3d2;transform:translateY(-1px);
    box-shadow:0 14px 40px -14px rgba(35,230,192,.75),0 0 0 1px rgba(35,230,192,.6);
  }
  .btn-ghost{
    background:transparent;color:var(--text-hi);
    border:1px solid var(--line-strong);
  }
  .btn-ghost:hover{
    border-color:var(--neon);color:var(--neon);transform:translateY(-1px);
    box-shadow:0 12px 30px -18px rgba(35,230,192,.5);
  }
  .btn-sm{min-height:38px;padding:0 16px;font-size:14px}
  .btn-block{width:100%}
  .link-arrow{
    display:inline-flex;align-items:center;gap:6px;
    color:var(--neon);font-size:14px;font-weight:600;
  }
  .link-arrow span{transition:transform .2s ease}
  .link-arrow:hover span{transform:translateX(4px)}

  /* ---------- 徽章 ---------- */
  .badge{
    display:inline-flex;align-items:center;height:28px;padding:0 12px;
    border-radius:999px;font-size:13px;font-weight:600;line-height:1;
    background:var(--neon-dim);color:var(--neon);
    border:1px solid rgba(35,230,192,.28);
  }
  .badge-mute{background:rgba(255,255,255,.04);color:var(--text-mid);border-color:var(--line)}
  .badge-violet{background:rgba(139,92,246,.14);color:#C4B5FD;border-color:rgba(139,92,246,.32)}
  .badge-row{display:flex;flex-wrap:wrap;gap:10px}

  /* ---------- 通用区块 ---------- */
  main{position:relative;z-index:1}
  section{padding:56px 0}
  @media(min-width:768px){section{padding:72px 0}}
  .section-head{
    display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;
    gap:16px;margin-bottom:32px;
  }
  .eyebrow{
    display:flex;align-items:center;gap:10px;
    font-family:'Barlow',Inter,sans-serif;font-size:13px;letter-spacing:.18em;
    color:var(--neon);text-transform:uppercase;
  }
  .eyebrow::before{
    content:"";width:4px;height:16px;border-radius:2px;background:var(--neon);
    box-shadow:0 0 12px rgba(35,230,192,.8);
  }
  .section-title{
    color:var(--text-hi);font-size:1.6rem;font-weight:700;line-height:1.3;
    letter-spacing:-.01em;margin-top:12px;
  }
  @media(min-width:768px){.section-title{font-size:2rem}}
  .section-sub{font-size:15px;color:var(--text-mid);margin-top:10px;max-width:60ch}

  .card{
    background:var(--ink-700);border-radius:var(--r-card);
    box-shadow:var(--shadow-card);padding:24px;
    transition:transform .22s ease,box-shadow .22s ease;
  }
  .card:hover{transform:translateY(-4px);box-shadow:var(--shadow-neon)}

  /* ---------- 抽屉 ---------- */
  .drawer{
    position:fixed;inset:0;z-index:90;display:none;
    background:rgba(3,4,6,.88);
    backdrop-filter:blur(6px);
  }
  .drawer.open{display:block}
  .drawer-panel{
    position:absolute;inset:0;
    background:var(--ink-900);
    border-left:1px solid rgba(35,230,192,.25);
    padding:20px;display:flex;flex-direction:column;gap:8px;
    overflow-y:auto;
  }
  .drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px}
  .drawer-close{
    width:44px;height:44px;border-radius:10px;display:grid;place-items:center;
    border:1px solid var(--line);color:var(--text-hi);
  }
  .drawer-close:hover{border-color:var(--neon);color:var(--neon)}
  .drawer-nav{display:flex;flex-direction:column}
  .drawer-nav a{
    display:flex;align-items:center;height:48px;padding:0 12px;border-radius:10px;
    color:var(--text-hi);font-size:16px;border-bottom:1px solid var(--line);
    opacity:0;transform:translateY(8px);
  }
  .drawer.open .drawer-nav a{animation:drawerIn .32s ease forwards}
  .drawer.open .drawer-nav a:nth-child(1){animation-delay:.03s}
  .drawer.open .drawer-nav a:nth-child(2){animation-delay:.06s}
  .drawer.open .drawer-nav a:nth-child(3){animation-delay:.09s}
  .drawer.open .drawer-nav a:nth-child(4){animation-delay:.12s}
  .drawer-nav a:hover{color:var(--neon);background:rgba(35,230,192,.06)}
  .drawer-nav a.active{color:var(--neon)}
  .drawer-cta{margin-top:18px}
  @keyframes drawerIn{to{opacity:1;transform:translateY(0)}}

  /* ---------- 面包屑 ---------- */
  .crumbs{
    display:flex;flex-wrap:wrap;align-items:center;gap:8px;
    font-size:13px;color:var(--text-low);padding:22px 0 0;
  }
  .crumbs a{color:var(--text-mid)}
  .crumbs a:hover{color:var(--neon)}
  .crumbs .sep{color:var(--text-low);opacity:.6}
  .crumbs .current{color:var(--text-low);max-width:52vw;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
  @media(min-width:768px){.crumbs .current{max-width:none}}

  /* ---------- 文章头 ---------- */
  .article-hero{position:relative;padding:28px 0 0;overflow:hidden}
  .article-hero::before{
    content:"";position:absolute;top:-120px;right:-80px;width:420px;height:420px;
    background:radial-gradient(circle,rgba(35,230,192,.2),transparent 68%);
    pointer-events:none;
  }
  .article-hero .lead-title{
    color:var(--text-hi);font-weight:800;line-height:1.25;
    font-size:clamp(1.9rem,5vw,2.7rem);letter-spacing:-.02em;margin-top:18px;
    max-width:24ch;
  }
  .article-meta{
    display:flex;flex-wrap:wrap;align-items:center;gap:10px 20px;
    margin-top:18px;font-size:14px;color:var(--text-mid);
  }
  .article-meta .dot{width:4px;height:4px;border-radius:50%;background:var(--line-strong)}
  .cover-wrap{
    margin-top:32px;border-radius:16px;overflow:hidden;
    box-shadow:var(--shadow-card);
  }
  .cover-wrap img{width:100%;aspect-ratio:16/9;object-fit:cover}
  .cover-wrap::after{
    content:"";display:block;height:0;
  }

  /* ---------- 正文排版 ---------- */
  .article-body{
    color:var(--text-mid);font-size:17px;line-height:1.9;
  }
  .article-body > * + *{margin-top:1.2em}
  .article-body p{max-width:72ch}
  .article-body h2{
    position:relative;color:var(--text-hi);font-size:24px;font-weight:700;
    line-height:1.4;margin-top:2em;padding-left:14px;letter-spacing:-.01em;
  }
  .article-body h2::before{
    content:"";position:absolute;left:0;top:.28em;bottom:.24em;width:4px;
    border-radius:2px;background:var(--neon);box-shadow:0 0 12px rgba(35,230,192,.7);
  }
  .article-body h3{color:var(--text-hi);font-size:19px;font-weight:600;margin-top:1.6em}
  .article-body a{
    color:var(--neon);
    border-bottom:1px solid rgba(35,230,192,.5);
    transition:font-weight .15s ease,border-color .2s ease;
  }
  .article-body a:hover{font-weight:600;border-color:var(--neon)}
  .article-body ul,.article-body ol{padding-left:4px}
  .article-body ul li{position:relative;padding-left:22px;margin-top:.6em}
  .article-body ul li::before{
    content:"";position:absolute;left:2px;top:.72em;width:7px;height:7px;
    border-radius:2px;background:var(--neon);opacity:.85;
  }
  .article-body ol{counter-reset:item}
  .article-body ol li{position:relative;padding-left:28px;margin-top:.6em;counter-increment:item}
  .article-body ol li::before{
    content:counter(item);position:absolute;left:0;top:.25em;
    width:20px;height:20px;border-radius:6px;display:grid;place-items:center;
    font-family:'Barlow',sans-serif;font-size:12px;font-weight:700;
    color:var(--neon);background:var(--neon-dim);
  }
  .article-body blockquote{
    margin:1.6em 0;padding:18px 22px;background:var(--ink-700);
    border-left:3px solid var(--neon);border-radius:0 var(--r-card) var(--r-card) 0;
    color:var(--text-mid);
  }
  .article-body img{border-radius:var(--r-img);margin:1.6em 0 .8em}
  .article-body figure{margin:1.6em 0}
  .article-body figcaption{font-size:13px;color:var(--text-low);text-align:center}
  .article-body code{
    background:var(--ink-700);border:1px solid var(--line);border-radius:6px;
    padding:2px 6px;font-size:14px;color:var(--text-hi);
  }
  .article-body pre{
    background:var(--ink-700);border:1px solid var(--line);border-radius:var(--r-card);
    padding:18px;overflow-x:auto;font-size:14px;line-height:1.7;color:var(--text-hi);
  }
  .article-body pre code{background:none;border:0;padding:0}
  .article-body table{
    width:100%;border-collapse:collapse;font-size:14.5px;
    background:var(--ink-800);border-radius:var(--r-card);overflow:hidden;
  }
  .article-body th,.article-body td{
    padding:12px 14px;text-align:left;border-bottom:1px solid var(--line);
  }
  .article-body th{color:var(--text-hi);font-weight:600;background:rgba(255,255,255,.03)}
  .article-body tr:last-child td{border-bottom:0}

  /* ---------- 阅读布局 ---------- */
  .read-grid{display:grid;grid-template-columns:1fr;gap:40px}
  @media(min-width:1024px){
    .read-grid{grid-template-columns:8fr 4fr;gap:48px}
  }
  .aside-stack{display:flex;flex-direction:column;gap:20px}
  .aside-card{
    background:var(--ink-700);border-radius:var(--r-card);
    box-shadow:var(--shadow-card);padding:22px;
  }
  .aside-card h3{color:var(--text-hi);font-size:16px;font-weight:600;margin-bottom:14px}
  .aside-list li + li{margin-top:12px;padding-top:12px;border-top:1px solid var(--line)}
  .aside-list a{display:flex;align-items:center;justify-content:space-between;gap:10px;font-size:14px;color:var(--text-mid)}
  .aside-list a:hover{color:var(--neon)}
  .aside-list .t{font-family:'Barlow',sans-serif;font-size:12px;color:var(--text-low)}
  .dl-card{
    background:linear-gradient(160deg,rgba(35,230,192,.12),rgba(20,23,29,.2));
    border-radius:var(--r-card);padding:22px;
    box-shadow:0 0 0 1px rgba(35,230,192,.28),0 18px 40px -24px rgba(0,0,0,.9);
  }
  .dl-card h3{color:var(--text-hi);font-size:16px;font-weight:600}
  .dl-card p{font-size:13.5px;color:var(--text-mid);margin-top:8px}
  .dl-card .btn{margin-top:16px;min-height:40px;padding:0 16px;font-size:14px}
  .spec-list li{
    display:flex;align-items:center;justify-content:space-between;gap:12px;
    padding:11px 0;border-bottom:1px solid var(--line);font-size:14px;
  }
  .spec-list li:last-child{border-bottom:0}
  .spec-list .k{color:var(--text-mid)}
  .spec-list .v{color:var(--text-hi);font-weight:600}

  .empty-state{
    background:var(--ink-700);border-radius:var(--r-card);
    box-shadow:var(--shadow-card);padding:48px 24px;text-align:center;
  }
  .empty-state h2{color:var(--text-hi);font-size:1.4rem;font-weight:700}
  .empty-state p{margin-top:12px;font-size:15px;color:var(--text-mid)}
  .empty-state .btn{margin-top:22px}

  /* ---------- 相关推荐 ---------- */
  .related-grid{display:grid;grid-template-columns:1fr;gap:20px}
  @media(min-width:768px){.related-grid{grid-template-columns:repeat(3,1fr)}}
  .rcard{
    background:var(--ink-700);border-radius:var(--r-card);overflow:hidden;
    box-shadow:var(--shadow-card);display:flex;flex-direction:column;
    transition:transform .22s ease,box-shadow .22s ease;
  }
  .rcard:hover{transform:translateY(-4px);box-shadow:var(--shadow-neon)}
  .rcard .thumb{overflow:hidden}
  .rcard .thumb img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .35s ease}
  .rcard:hover .thumb img{transform:scale(1.03)}
  .rcard .body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1}
  .rcard h3{color:var(--text-hi);font-size:16px;font-weight:600;line-height:1.5}
  .rcard p{font-size:14px;line-height:1.7;color:var(--text-mid)}
  .rcard .foot{
    margin-top:auto;display:flex;align-items:center;justify-content:space-between;
    font-size:12px;color:var(--text-low);font-family:'Barlow',sans-serif;
  }

  /* ---------- FAQ ---------- */
  .faq-wrap{max-width:820px;margin:0 auto}
  .faq-item{border-bottom:1px solid var(--line)}
  .faq-item:first-child{border-top:1px solid var(--line)}
  .faq-q{
    width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
    min-height:64px;padding:16px 4px;text-align:left;
    color:var(--text-hi);font-size:16px;font-weight:600;
  }
  .faq-q:hover{color:var(--neon)}
  .faq-icon{
    flex:0 0 auto;width:24px;height:24px;position:relative;
    transition:transform .2s ease;
  }
  .faq-icon::before,.faq-icon::after{
    content:"";position:absolute;left:50%;top:50%;background:var(--neon);border-radius:2px;
    transform:translate(-50%,-50%);
  }
  .faq-icon::before{width:14px;height:2px}
  .faq-icon::after{width:2px;height:14px;transition:opacity .2s ease}
  .faq-item.open .faq-icon{transform:rotate(180deg)}
  .faq-item.open .faq-icon::after{opacity:0}
  .faq-a{
    max-height:0;overflow:hidden;transition:max-height .28s ease;
  }
  .faq-a p{padding:0 4px 20px;font-size:15px;line-height:1.85;color:var(--text-mid)}

  /* ---------- CTA ---------- */
  .cta-band{
    position:relative;border-radius:var(--r-panel);overflow:hidden;
    background:var(--ink-800);padding:32px 24px;
    box-shadow:0 0 0 1px rgba(35,230,192,.3),0 24px 60px -30px rgba(0,0,0,.95);
    display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:20px;
  }
  @media(min-width:768px){.cta-band{padding:40px}}
  .cta-band::before{
    content:"";position:absolute;inset:0;
    background:radial-gradient(600px 220px at 12% 0%,rgba(35,230,192,.16),transparent 70%);
    pointer-events:none;
  }
  .cta-band h2{position:relative;color:var(--text-hi);font-size:1.5rem;font-weight:700;line-height:1.35}
  .cta-band p{position:relative;font-size:14.5px;color:var(--text-mid);margin-top:8px;max-width:46ch}
  .cta-actions{position:relative;display:flex;flex-wrap:wrap;gap:12px}
  @media(max-width:639px){
    .cta-actions{width:100%;flex-direction:column}
    .cta-actions .btn{width:100%}
  }

  /* ---------- 页脚 ---------- */
  .site-footer{
    position:relative;z-index:1;margin-top:64px;
    background:var(--ink-800);border-top:1px solid var(--line);
    padding:56px 0 28px;
  }
  .footer-grid{display:grid;grid-template-columns:1fr;gap:32px}
  @media(min-width:640px){.footer-grid{grid-template-columns:1fr 1fr}}
  @media(min-width:1024px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1.3fr;gap:40px}}
  .footer-col h3{
    color:var(--text-hi);font-size:14px;font-weight:600;letter-spacing:.02em;
    margin-bottom:14px;
  }
  .footer-col ul li + li{margin-top:10px}
  .footer-col ul a{font-size:14px;color:var(--text-mid);transition:color .2s ease}
  .footer-col ul a:hover{color:var(--neon)}
  .footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
  .footer-col p{font-size:14px;color:var(--text-mid);max-width:38ch}
  .sub-form{display:flex;flex-direction:column;gap:10px}
  .sub-form label{font-size:13.5px;color:var(--text-mid)}
  .sub-form input{
    width:100%;height:46px;padding:0 16px;border-radius:var(--r-btn);
    background:var(--ink-600);border:1px solid var(--line);color:var(--text-hi);
    transition:border-color .2s ease,box-shadow .2s ease;
  }
  .sub-form input::placeholder{color:var(--text-low)}
  .sub-form input:focus{
    outline:none;border-color:var(--neon);
    box-shadow:0 0 0 3px rgba(35,230,192,.18);
  }
  .sub-form .err{font-size:13px;color:#F0A28C;min-height:0}
  .footer-bottom{
    margin-top:40px;padding-top:20px;border-top:1px solid var(--line);
    display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
    font-size:12.5px;color:var(--text-low);
  }

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

/* roulang page: category1 */
:root{
  --ink-900:#07080B; --ink-800:#0C0E12; --ink-700:#14171D; --ink-600:#1D222A;
  --line:rgba(255,255,255,0.08); --line-strong:rgba(255,255,255,0.16);
  --neon:#23E6C0; --neon-dim:rgba(35,230,192,0.16); --violet:#8B5CF6; --star:#FFC24B;
  --text-hi:#F2F6F5; --text-mid:#A8B3B7; --text-low:#6C777C;
  --r-panel:20px; --r-card:14px; --r-btn:10px; --r-img:12px; --r-pill:999px;
  --shadow-card:0 0 0 1px var(--line), 0 18px 40px -24px rgba(0,0,0,.9);
  --shadow-hover:0 0 0 1px rgba(35,230,192,.55), 0 12px 40px -12px rgba(35,230,192,.35);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;background:var(--ink-900);color:var(--text-mid);
  font-family:'PingFang SC','HarmonyOS Sans SC','Microsoft YaHei','Source Han Sans SC',system-ui,-apple-system,sans-serif;
  font-size:15px;line-height:1.85;overflow-x:hidden;
}
body::before{
  content:"";position:fixed;inset:0;pointer-events:none;z-index:0;
  background-image:linear-gradient(rgba(255,255,255,.03) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.03) 1px,transparent 1px);
  background-size:40px 40px;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{margin:0;color:var(--text-hi);font-weight:700}
h1{font-size:clamp(2rem,7vw,2.6rem);line-height:1.22;letter-spacing:-.02em;font-weight:800}
h2{font-size:1.6rem;line-height:1.3}
h3{font-size:1.125rem;line-height:1.4;font-weight:600}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
button{font:inherit;color:inherit;cursor:pointer}
input{font:inherit}
:focus-visible{outline:2px solid var(--neon);outline-offset:2px}
.site-header,.site-footer,main,section{position:relative;z-index:1}

/* 容器 */
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px;position:relative;z-index:1}
@media (min-width:768px){.container{padding:0 32px}}

/* 板块 */
.section{padding:64px 0}
@media (min-width:1024px){.section{padding:96px 0}}
.section-tight{padding:48px 0}
@media (min-width:1024px){.section-tight{padding:64px 0}}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:32px}
@media (min-width:1024px){.section-head{margin-bottom:48px}}
.eyebrow{display:inline-flex;align-items:center;gap:10px;font-size:13px;letter-spacing:.18em;color:var(--neon);font-weight:600;font-variant-numeric:tabular-nums;margin-bottom:14px}
.eyebrow::before{content:"";width:4px;height:16px;border-radius:2px;background:var(--neon);box-shadow:0 0 12px rgba(35,230,192,.7)}
.section-title{display:flex;align-items:center;gap:12px;font-size:1.6rem;letter-spacing:-.01em}
@media (min-width:1024px){.section-title{font-size:2rem}}
.section-title::before{content:"";width:4px;height:22px;border-radius:2px;background:var(--neon);box-shadow:0 0 12px rgba(35,230,192,.6);flex-shrink:0}
.section-sub{margin-top:14px;font-size:15px;color:var(--text-mid);max-width:640px}
.glow-line{height:1px;border:0;margin:0;background:linear-gradient(90deg,transparent,rgba(35,230,192,.4),transparent)}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 22px;border:1px solid transparent;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;letter-spacing:.01em;white-space:nowrap;
  transition:transform .2s ease,box-shadow .25s ease,background-color .2s ease,color .2s ease,border-color .2s ease;
}
.btn-primary{background:var(--neon);color:#04120E;box-shadow:0 12px 30px -16px rgba(35,230,192,.8)}
.btn-primary:hover{background:#3df0cd;transform:translateY(-1px);box-shadow:0 16px 34px -14px rgba(35,230,192,.75)}
.btn-primary:active{transform:scale(.98)}
.btn-ghost{background:transparent;border-color:var(--line-strong);color:var(--text-hi)}
.btn-ghost:hover{border-color:var(--neon);color:var(--neon);transform:translateY(-1px)}
.btn-ghost:active{transform:scale(.98)}
.btn-sm{height:38px;padding:0 16px;font-size:14px}
.btn-lg{height:52px;padding:0 30px;font-size:16px}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--neon)}
.link-arrow svg{transition:transform .2s ease}
.link-arrow:hover svg{transform:translateX(4px)}

/* 徽章 */
.badge{
  display:inline-flex;align-items:center;gap:6px;height:28px;padding:0 12px;border-radius:var(--r-pill);
  font-size:12px;letter-spacing:.02em;font-variant-numeric:tabular-nums;
  background:var(--ink-600);border:1px solid var(--line);color:var(--text-mid);
}
.badge.neon{background:var(--neon-dim);border-color:rgba(35,230,192,.35);color:var(--neon)}
.badge.violet{background:rgba(139,92,246,.14);border-color:rgba(139,92,246,.34);color:#B79CFB}
.badge-row{display:flex;flex-wrap:wrap;gap:10px}

/* 卡片 */
.card{
  background:var(--ink-700);border:1px solid var(--line);border-radius:var(--r-card);
  padding:24px;box-shadow:var(--shadow-card);
  transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:transparent}

/* 顶部导航 */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(7,8,11,.72);
  -webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);
}
.site-header::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(35,230,192,.55),transparent);
  opacity:0;transition:opacity .3s ease;
}
.site-header.scrolled::after{opacity:1}
.header-inner{display:flex;align-items:center;gap:24px;height:68px;transition:height .25s ease}
.site-header.scrolled .header-inner{height:60px}
.brand{display:flex;align-items:center;gap:10px;margin-right:auto;flex-shrink:0}
.brand-mark{
  width:34px;height:34px;display:grid;place-items:center;flex-shrink:0;
  border-radius:10px;background:var(--neon-dim);border:1px solid rgba(35,230,192,.35);
}
.brand-mark svg{width:20px;height:20px}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-name{font-size:15px;font-weight:700;color:var(--text-hi);letter-spacing:.01em}
.brand-sub{font-size:10px;letter-spacing:.16em;color:var(--text-low);text-transform:uppercase}
.nav-desktop{display:none;align-items:center;gap:30px}
@media (min-width:1024px){.nav-desktop{display:flex}}
.nav-link{position:relative;padding:6px 0;font-size:15px;color:var(--text-mid);transition:color .2s ease}
.nav-link::after{
  content:"";position:absolute;left:0;bottom:0;height:2px;width:100%;border-radius:2px;
  background:var(--neon);transform:scaleX(0);transform-origin:left;transition:transform .2s ease;
}
.nav-link:hover{color:var(--neon)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.active{color:var(--neon);text-shadow:0 0 8px rgba(35,230,192,.5)}
.nav-link.active::after{transform:scaleX(1)}
.header-cta{flex-shrink:0}
@media (max-width:639px){.header-cta{display:none}}
.burger{
  display:inline-flex;align-items:center;justify-content:center;
  width:44px;height:44px;flex-shrink:0;border-radius:10px;
  background:var(--ink-700);border:1px solid var(--line-strong);color:var(--text-hi);
  transition:border-color .2s ease,color .2s ease;
}
.burger:hover{border-color:var(--neon);color:var(--neon)}
@media (min-width:1024px){.burger{display:none}}

/* 移动抽屉 */
.drawer{
  position:fixed;inset:0;z-index:100;display:flex;flex-direction:column;padding:20px;
  background:rgba(7,8,11,.98);border-left:1px solid var(--line-strong);
  transform:translateX(100%);visibility:hidden;
  transition:transform .3s ease,visibility .3s ease;
}
.drawer.open{transform:translateX(0);visibility:visible}
.drawer-head{display:flex;align-items:center;justify-content:space-between;gap:16px;padding-bottom:16px;border-bottom:1px solid var(--line)}
.drawer-close{
  width:44px;height:44px;display:grid;place-items:center;border-radius:10px;
  background:var(--ink-700);border:1px solid var(--line-strong);color:var(--text-hi);font-size:20px;line-height:1;
}
.drawer-nav{display:flex;flex-direction:column;margin:18px 0 auto}
.drawer-link{
  display:flex;align-items:center;height:48px;font-size:16px;color:var(--text-mid);
  border-bottom:1px solid var(--line);opacity:0;transform:translateY(8px);
  transition:opacity .3s ease,transform .3s ease,color .2s ease;
}
.drawer-link:hover,.drawer-link.active{color:var(--neon)}
.drawer.open .drawer-link{opacity:1;transform:none}
.drawer.open .drawer-link:nth-child(1){transition-delay:.03s}
.drawer.open .drawer-link:nth-child(2){transition-delay:.06s}
.drawer.open .drawer-link:nth-child(3){transition-delay:.09s}
.drawer-cta{width:100%;margin-top:20px}

/* 分类页头 */
.page-hero{position:relative;overflow:hidden;padding:40px 0 56px;border-bottom:1px solid var(--line)}
.page-hero-bg{
  position:absolute;inset:0;opacity:.3;
  background-image:url('/assets/images/backpic/back-1.png');
  background-size:cover;background-position:center;
}
.page-hero-veil{
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(7,8,11,.7) 0%,rgba(7,8,11,.9) 55%,#07080B 100%);
}
.page-hero::after{
  content:"";position:absolute;top:-180px;right:-100px;width:520px;height:520px;
  background:radial-gradient(circle,rgba(35,230,192,.14),transparent 65%);pointer-events:none;
}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-low);margin-bottom:22px}
.breadcrumb a{color:var(--text-mid);transition:color .2s ease}
.breadcrumb a:hover{color:var(--neon)}
.breadcrumb em{font-style:normal;color:var(--text-low)}
.page-hero h1{max-width:820px}
.page-lead{margin-top:18px;font-size:15px;line-height:1.85;color:var(--text-mid);max-width:660px}
@media (min-width:1024px){.page-hero{padding:56px 0 72px}.page-hero h1{font-size:clamp(2.6rem,4.4vw,3.2rem)}.page-lead{font-size:16px}}
.page-hero .badge-row{margin-top:26px}

/* 图文交错 */
.split-block + .split-block{margin-top:56px}
@media (min-width:1024px){.split-block + .split-block{margin-top:96px}}
.split{display:grid;gap:28px;align-items:center}
@media (min-width:1024px){
  .split{grid-template-columns:1fr 1fr;gap:64px}
  .split.reverse .split-media{order:2}
}
.split-media{
  border-radius:var(--r-img);overflow:hidden;border:1px solid var(--line);
  background:var(--ink-700);box-shadow:var(--shadow-card);
}
.split-media img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .5s ease}
.split-media:hover img{transform:scale(1.03)}
.split-body h2{font-size:1.45rem;line-height:1.35}
@media (min-width:1024px){.split-body h2{font-size:1.75rem}}
.split-body p{margin-top:16px;font-size:15px;line-height:1.85}
@media (min-width:1024px){.split-body p{font-size:16px;line-height:1.8}}
.checks{margin-top:20px}
.checks li{position:relative;padding-left:20px;margin-bottom:10px;font-size:14px;line-height:1.8;color:var(--text-mid)}
.checks li::before{
  content:"";position:absolute;left:0;top:9px;width:7px;height:7px;border-radius:2px;
  background:var(--neon);box-shadow:0 0 8px rgba(35,230,192,.6);
}
.split-body .link-arrow{margin-top:22px}

/* 步骤流程 */
.steps{display:grid;gap:20px}
@media (min-width:1024px){.steps{grid-template-columns:repeat(4,1fr);gap:24px}}
.step{
  position:relative;background:var(--ink-700);border:1px solid var(--line);
  border-radius:var(--r-card);padding:24px;box-shadow:var(--shadow-card);
  transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
}
.step:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:transparent}
.step-num{font-size:13px;letter-spacing:.18em;color:var(--neon);font-weight:600;font-variant-numeric:tabular-nums}
.step h3{margin-top:12px;font-size:1.05rem}
.step p{margin-top:10px;font-size:14px;line-height:1.75;color:var(--text-mid)}
@media (min-width:1024px){
  .step:not(:last-child)::after{
    content:"";position:absolute;top:46px;left:100%;width:24px;height:1px;
    background:linear-gradient(90deg,rgba(35,230,192,.7),rgba(35,230,192,.08));
  }
}

/* 参数定义列表 */
.spec-wrap{display:grid;gap:32px}
@media (min-width:1024px){.spec-wrap{grid-template-columns:1.7fr 1fr;gap:48px;align-items:start}}
.spec-cols{display:grid;gap:32px}
@media (min-width:768px){.spec-cols{grid-template-columns:1fr 1fr;gap:44px}}
.spec-col h3{font-size:1rem;color:var(--text-hi);padding-bottom:12px;border-bottom:1px solid var(--line-strong)}
.spec-row{
  display:flex;align-items:baseline;justify-content:space-between;gap:16px;
  padding:14px 0;border-bottom:1px solid var(--line);font-size:14px;color:var(--text-mid);
}
.spec-row b{color:var(--text-hi);font-weight:600;font-variant-numeric:tabular-nums;text-align:right}
.compat-card{
  background:var(--ink-700);border:1px solid var(--line);border-radius:var(--r-panel);
  padding:24px;box-shadow:var(--shadow-card);
}
.compat-card .tick{
  width:38px;height:38px;display:grid;place-items:center;border-radius:12px;
  background:var(--neon-dim);border:1px solid rgba(35,230,192,.35);margin-bottom:16px;
}
.compat-card h3{font-size:1.05rem;margin-bottom:10px}
.compat-card p{font-size:14px;line-height:1.8;color:var(--text-mid)}

/* FAQ */
.faq{max-width:820px;margin:0 auto}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
  min-height:64px;padding:14px 0;background:none;border:0;text-align:left;
  font-size:16px;font-weight:600;color:var(--text-hi);transition:color .2s ease;
}
.faq-q:hover{color:var(--neon)}
.faq-icon{position:relative;width:18px;height:18px;flex-shrink:0}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--neon);border-radius:2px;
  transform:translate(-50%,-50%);transition:transform .2s ease,opacity .2s ease;
}
.faq-icon::before{width:14px;height:2px}
.faq-icon::after{width:2px;height:14px}
.faq-item.open .faq-icon::after{transform:translate(-50%,-50%) rotate(90deg);opacity:0}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease}
.faq-a p{padding:0 0 20px;font-size:15px;line-height:1.85;color:var(--text-mid);max-width:720px}

/* CTA 高亮面板 */
.cta-panel{
  position:relative;overflow:hidden;text-align:center;
  padding:40px 24px;border-radius:var(--r-panel);
  background:linear-gradient(135deg,#EAFDF8 0%,#C7F5EA 100%);
  box-shadow:0 0 0 1px rgba(35,230,192,.4),0 30px 70px -34px rgba(35,230,192,.55);
}
@media (min-width:768px){.cta-panel{padding:56px 48px}}
.cta-panel h2{color:#06110E;font-size:1.5rem;line-height:1.3}
@media (min-width:1024px){.cta-panel h2{font-size:2rem}}
.cta-desc{margin-top:14px;font-size:15px;line-height:1.8;color:#31504A;max-width:560px;margin-left:auto;margin-right:auto}
.cta-actions{display:flex;flex-wrap:wrap;justify-content:center;gap:14px;margin-top:28px}
@media (max-width:639px){.cta-actions{flex-direction:column}.cta-actions .btn{width:100%}}
.cta-panel .btn-primary{background:#07080B;color:var(--neon);box-shadow:0 14px 30px -16px rgba(7,8,11,.7)}
.cta-panel .btn-primary:hover{background:#141A1D;color:#3df0cd}
.cta-panel .btn-ghost{border-color:rgba(7,17,14,.28);color:#12211E}
.cta-panel .btn-ghost:hover{border-color:#07080B;color:#07080B}
.cta-note{margin-top:18px;font-size:12px;letter-spacing:.04em;color:#3D5C55}

/* 页脚 */
.site-footer{background:var(--ink-800);border-top:1px solid var(--line);padding:56px 0 24px;margin-top:8px}
.footer-grid{display:grid;gap:32px}
@media (min-width:768px){.footer-grid{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px}}
.footer-col h3{font-size:15px;margin-bottom:16px;letter-spacing:.01em}
.footer-col ul li{margin-bottom:10px}
.footer-col a{font-size:14px;color:var(--text-mid);transition:color .2s ease}
.footer-col a:hover{color:var(--neon)}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-col p{font-size:14px;line-height:1.8;color:var(--text-mid)}
.sub-form label{display:block;font-size:13px;line-height:1.7;color:var(--text-mid);margin-bottom:10px}
.sub-form input{
  width:100%;height:46px;padding:0 16px;margin-bottom:12px;
  background:var(--ink-600);border:1px solid var(--line);border-radius:var(--r-btn);
  color:var(--text-hi);font-size:15px;transition:border-color .2s ease,box-shadow .2s ease;
}
.sub-form input::placeholder{color:var(--text-low)}
.sub-form input:focus{outline:none;border-color:var(--neon);box-shadow:0 0 0 3px rgba(35,230,192,.16)}
.sub-form .btn{width:100%}
.footer-bottom{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;
  margin-top:44px;padding-top:20px;border-top:1px solid var(--line);
  font-size:12px;color:var(--text-low);
}

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

/* roulang page: category2 */
:root{
    --ink-900:#07080B;
    --ink-800:#0C0E12;
    --ink-700:#14171D;
    --ink-600:#1D222A;
    --line:rgba(255,255,255,.08);
    --line-strong:rgba(255,255,255,.16);
    --neon:#23E6C0;
    --neon-dim:rgba(35,230,192,.16);
    --violet:#8B5CF6;
    --star:#FFC24B;
    --text-hi:#F2F6F5;
    --text-mid:#A8B3B7;
    --text-low:#6C777C;
    --r-panel:20px;
    --r-card:14px;
    --r-btn:10px;
    --r-img:12px;
    --shadow-card:0 0 0 1px var(--line), 0 18px 40px -24px rgba(0,0,0,.9);
    --shadow-hover:0 0 0 1px var(--neon), 0 12px 40px -12px rgba(35,230,192,.35);
  }

  *,*::before,*::after{box-sizing:border-box}
  html{-webkit-text-size-adjust:100%}
  body{
    margin:0;
    background:var(--ink-900);
    color:var(--text-mid);
    font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Inter",system-ui,sans-serif;
    font-size:16px;
    line-height:1.8;
    -webkit-font-smoothing:antialiased;
    overflow-x:hidden;
  }
  img{max-width:100%;display:block;border-style:none}
  a{color:inherit;text-decoration:none}
  button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
  input{font:inherit}
  ul,ol{margin:0;padding:0;list-style:none}
  h1,h2,h3,h4,p,dl,dd,dt,figure{margin:0}
  :focus-visible{outline:2px solid var(--neon);outline-offset:2px}
  ::selection{background:rgba(35,230,192,.28);color:#fff}

  .container{width:100%;max-width:1200px;margin-inline:auto;padding-inline:32px}
  body .container{max-width:1200px}
  @media (max-width:640px){
    .container{padding-inline:20px}
  }

  /* ============ 顶部导航 ============ */
  .site-header{
    position:sticky;top:0;z-index:60;
    background:rgba(7,8,11,.72);
    -webkit-backdrop-filter:blur(12px);
    backdrop-filter:blur(12px);
    transition:background .3s ease;
  }
  .site-header::after{
    content:"";position:absolute;left:0;right:0;bottom:0;height:1px;
    background:linear-gradient(90deg,transparent 0%,var(--neon) 50%,transparent 100%);
    opacity:0;transition:opacity .3s ease;
  }
  .site-header.is-scrolled{background:rgba(7,8,11,.92)}
  .site-header.is-scrolled::after{opacity:1}

  .header-inner{
    display:flex;align-items:center;gap:16px;
    height:68px;transition:height .3s ease;
  }
  .site-header.is-scrolled .header-inner{height:60px}

  .brand{display:flex;align-items:center;gap:12px;flex-shrink:0}
  .brand-mark{
    width:36px;height:36px;border-radius:10px;flex:none;
    background:var(--ink-700);border:1px solid var(--line);
    display:flex;align-items:center;justify-content:center;
    transition:border-color .2s ease, box-shadow .2s ease;
  }
  .brand:hover .brand-mark{border-color:var(--neon);box-shadow:0 0 22px -6px rgba(35,230,192,.6)}
  .brand-mark svg{width:20px;height:20px}
  .brand-text{display:flex;flex-direction:column;line-height:1.25}
  .brand-name{font-size:15px;font-weight:700;color:var(--text-hi);letter-spacing:-.01em;white-space:nowrap}
  .brand-sub{font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--text-low)}

  .nav-desktop{display:flex;align-items:center;gap:4px;margin-left:auto}
  .nav-link{
    position:relative;display:inline-flex;align-items:center;
    height:44px;padding:0 14px;font-size:14.5px;color:var(--text-mid);
    border-radius:8px;transition:color .2s ease;
  }
  .nav-link::after{
    content:"";position:absolute;left:14px;right:14px;bottom:6px;height:2px;
    background:var(--neon);border-radius:2px;
    transform:scaleX(0);transform-origin:left;
    transition:transform .2s ease;
  }
  .nav-link:hover{color:var(--neon)}
  .nav-link:hover::after{transform:scaleX(1)}
  .nav-link.active{color:var(--text-hi);text-shadow:0 0 8px rgba(35,230,192,.45)}
  .nav-link.active::after{transform:scaleX(1)}

  .header-cta{margin-left:12px}

  .burger{
    display:none;width:44px;height:44px;border-radius:10px;
    border:1px solid var(--line-strong);color:var(--text-hi);
    align-items:center;justify-content:center;margin-left:auto;
    transition:border-color .2s ease,color .2s ease;
  }
  .burger:hover{border-color:var(--neon);color:var(--neon)}

  /* 抽屉 */
  .drawer{
    position:fixed;top:0;right:0;bottom:0;width:min(88vw,380px);z-index:90;
    background:var(--ink-800);border-left:1px solid var(--line-strong);
    transform:translateX(102%);transition:transform .32s cubic-bezier(.4,0,.2,1);
    padding:20px;display:flex;flex-direction:column;gap:8px;overflow-y:auto;
  }
  .drawer.open{transform:translateX(0)}
  .drawer-head{display:flex;align-items:center;justify-content:space-between;padding-bottom:16px;border-bottom:1px solid var(--line)}
  .drawer-close{
    width:44px;height:44px;border-radius:10px;border:1px solid var(--line-strong);
    display:flex;align-items:center;justify-content:center;color:var(--text-hi);
  }
  .drawer-close:hover{border-color:var(--neon);color:var(--neon)}
  .drawer-nav{display:flex;flex-direction:column;gap:6px;padding-top:12px}
  .drawer-link{
    height:48px;display:flex;align-items:center;padding:0 14px;
    border-radius:10px;border:1px solid transparent;color:var(--text-mid);font-size:15px;
    opacity:0;transform:translateY(8px);
  }
  .drawer.open .drawer-link{animation:drawerIn .38s ease forwards}
  .drawer.open .drawer-link:nth-child(1){animation-delay:.04s}
  .drawer.open .drawer-link:nth-child(2){animation-delay:.09s}
  .drawer.open .drawer-link:nth-child(3){animation-delay:.14s}
  .drawer.open .drawer-link:nth-child(4){animation-delay:.19s}
  .drawer-link.active{color:var(--text-hi);background:var(--neon-dim);border-color:rgba(35,230,192,.35)}
  .drawer-link:hover{border-color:var(--line-strong);color:var(--neon)}
  @keyframes drawerIn{to{opacity:1;transform:translateY(0)}}
  .drawer-cta{margin-top:auto}
  .drawer-mask{
    position:fixed;inset:0;background:rgba(4,5,7,.66);z-index:80;
    opacity:0;visibility:hidden;transition:opacity .3s ease,visibility .3s ease;
  }
  .drawer-mask.show{opacity:1;visibility:visible}

  /* ============ 通用按钮 ============ */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    height:46px;padding:0 22px;border-radius:var(--r-btn);
    font-size:15px;font-weight:600;letter-spacing:.01em;
    border:1px solid transparent;transition:all .2s ease;white-space:nowrap;
  }
  .btn-primary{background:var(--neon);color:#07080B;box-shadow:0 0 0 1px rgba(35,230,192,.45)}
  .btn-primary:hover{filter:brightness(1.08);transform:translateY(-1px);box-shadow:0 12px 34px -10px rgba(35,230,192,.6)}
  .btn-primary:active{transform:scale(.98)}
  .btn-ghost{background:transparent;color:var(--text-hi);border-color:var(--line-strong)}
  .btn-ghost:hover{border-color:var(--neon);color:var(--neon);transform:translateY(-1px)}
  .btn-ghost:active{transform:scale(.98)}
  .btn-sm{height:38px;padding:0 16px;font-size:14px;border-radius:9px}
  .btn-block{width:100%}

  .link-arrow{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--neon)}
  .link-arrow svg{width:14px;height:14px;transition:transform .2s ease}
  .link-arrow:hover svg{transform:translateX(4px)}

  /* ============ 徽章 ============ */
  .badge{
    display:inline-flex;align-items:center;gap:6px;height:28px;padding:0 12px;
    border-radius:999px;font-size:12.5px;letter-spacing:.02em;
    background:rgba(255,255,255,.04);border:1px solid var(--line);color:var(--text-mid);
    font-variant-numeric:tabular-nums;
  }
  .badge-neon{background:var(--neon-dim);border-color:rgba(35,230,192,.35);color:var(--neon)}
  .badge-violet{background:rgba(139,92,246,.16);border-color:rgba(139,92,246,.35);color:#C4B5FD}

  /* ============ 页头 ============ */
  .page-hero{position:relative;overflow:hidden;padding:56px 0 76px;background:var(--ink-900)}
  .page-hero::before{
    content:"";position:absolute;inset:0;
    background-image:url(/assets/images/backpic/back-2.png);
    background-size:cover;background-position:center;
    opacity:.16;
  }
  .page-hero::after{
    content:"";position:absolute;inset:0;
    background:linear-gradient(180deg,rgba(7,8,11,.55) 0%,rgba(7,8,11,.86) 58%,var(--ink-900) 100%);
  }
  .page-hero-inner{position:relative;z-index:2;max-width:860px}
  .breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-low);margin-bottom:22px}
  .breadcrumb a{color:var(--text-mid);transition:color .2s ease}
  .breadcrumb a:hover{color:var(--neon)}
  .breadcrumb .sep{color:var(--line-strong)}
  .breadcrumb .current{color:var(--text-low)}
  .page-title{
    font-size:clamp(2rem,4.6vw,3.4rem);line-height:1.2;font-weight:800;
    letter-spacing:-.02em;color:var(--text-hi);margin:18px 0 16px;
  }
  .page-title .accent{color:var(--neon)}
  .lede{font-size:16px;line-height:1.85;color:var(--text-mid);margin-bottom:10px}
  .hero-meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}
  .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px}

  /* ============ 板块 ============ */
  .section{padding:96px 0}
  .section-tight{padding:72px 0}
  @media (max-width:768px){
    .section{padding:64px 0}
    .section-tight{padding:48px 0}
    .page-hero{padding:32px 0 56px}
  }
  .section-head{max-width:760px;margin-bottom:44px}
  .section-index{
    display:block;font-size:13px;letter-spacing:.18em;color:var(--neon);
    font-variant-numeric:tabular-nums;margin-bottom:10px;
  }
  .section-title{
    position:relative;padding-left:16px;
    font-size:2rem;line-height:1.25;font-weight:700;color:var(--text-hi);letter-spacing:-.01em;
  }
  .section-title::before{
    content:"";position:absolute;left:0;top:.28em;width:4px;height:1.1em;
    background:var(--neon);border-radius:2px;
  }
  .section-sub{margin-top:12px;font-size:15px;line-height:1.8;color:var(--text-mid)}
  @media (max-width:768px){
    .section-title{font-size:1.6rem}
  }

  /* ============ 双栏对照 ============ */
  .compare{
    display:grid;grid-template-columns:1fr 1fr;gap:0;
    background:var(--ink-800);border:1px solid var(--line);border-radius:var(--r-panel);
    overflow:hidden;
  }
  .compare-col{padding:36px 34px}
  .compare-col + .compare-col{border-left:1px solid var(--line)}
  .compare-col h3{font-size:1.25rem;font-weight:600;color:var(--text-hi);margin:16px 0 8px}
  .compare-col .col-note{font-size:14px;line-height:1.7;color:var(--text-low);margin-bottom:20px}
  .point-list{display:flex;flex-direction:column;gap:14px}
  .point-list li{display:flex;gap:12px;font-size:15px;line-height:1.75;color:var(--text-mid)}
  .point-list li::before{
    content:"";flex:none;width:7px;height:7px;margin-top:11px;
    background:var(--neon);border-radius:2px;box-shadow:0 0 12px rgba(35,230,192,.6);
  }
  @media (max-width:768px){
    .compare{grid-template-columns:1fr}
    .compare-col{padding:28px 22px}
    .compare-col + .compare-col{border-left:0;border-top:1px solid var(--line)}
  }

  /* ============ 横向要点条 ============ */
  .strip-list{display:flex;flex-direction:column;gap:18px}
  .strip{
    display:grid;grid-template-columns:56px 1fr auto;align-items:center;gap:24px;
    padding:26px 28px;background:var(--ink-700);
    border:1px solid var(--line);border-radius:var(--r-card);
    transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
  }
  .strip:hover{transform:translateY(-4px);border-color:var(--neon);box-shadow:var(--shadow-hover)}
  .strip:nth-child(2){background:linear-gradient(90deg,rgba(35,230,192,.07) 0%,var(--ink-700) 42%)}
  .strip-icon{
    width:56px;height:56px;border-radius:12px;flex:none;
    background:var(--neon-dim);border:1px solid rgba(35,230,192,.28);
    display:flex;align-items:center;justify-content:center;color:var(--neon);
  }
  .strip-icon svg{width:24px;height:24px}
  .strip-body h3{font-size:1.15rem;font-weight:600;color:var(--text-hi);margin-bottom:6px}
  .strip-body p{font-size:14.5px;line-height:1.75;color:var(--text-mid)}
  @media (max-width:768px){
    .strip{grid-template-columns:48px 1fr;gap:16px;padding:22px 20px}
    .strip-icon{width:48px;height:48px}
    .strip .link-arrow{grid-column:2}
  }

  /* ============ 参数定义列表 ============ */
  .spec-layout{display:grid;grid-template-columns:1fr 1fr;gap:24px}
  @media (max-width:900px){.spec-layout{grid-template-columns:1fr}}
  .spec-block{
    background:var(--ink-800);border:1px solid var(--line);
    border-radius:var(--r-card);padding:28px 26px;
  }
  .spec-block h3{
    font-size:1.1rem;font-weight:600;color:var(--text-hi);
    padding-bottom:16px;margin-bottom:6px;border-bottom:1px solid var(--line-strong);
  }
  .spec-row{
    display:flex;align-items:baseline;justify-content:space-between;gap:16px;
    padding:14px 0;border-bottom:1px solid var(--line);
  }
  .spec-row:last-child{border-bottom:0}
  .spec-row dt{font-size:14px;color:var(--text-mid)}
  .spec-row dd{
    font-size:14.5px;font-weight:600;color:var(--text-hi);
    font-variant-numeric:tabular-nums;text-align:right;
  }

  .media-strip{
    display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,1fr);gap:28px;
    align-items:center;margin-top:24px;
    background:var(--ink-800);border:1px solid var(--line);
    border-radius:var(--r-panel);overflow:hidden;
  }
  .media-strip .media-img{overflow:hidden;height:100%}
  .media-strip .media-img img{width:100%;height:100%;min-height:240px;object-fit:cover;transition:transform .4s ease}
  .media-strip:hover .media-img img{transform:scale(1.03)}
  .media-strip .media-body{padding:32px 32px 32px 4px}
  .media-strip h3{font-size:1.25rem;font-weight:600;color:var(--text-hi);margin-bottom:12px}
  .media-strip p{font-size:14.5px;line-height:1.8;color:var(--text-mid);margin-bottom:18px}
  @media (max-width:900px){
    .media-strip{grid-template-columns:1fr}
    .media-strip .media-body{padding:0 24px 28px}
    .media-strip .media-img img{min-height:200px}
  }

  /* ============ FAQ ============ */
  .faq{max-width:820px;margin:0 auto}
  .faq-item{border-bottom:1px solid var(--line)}
  .faq-q{
    width:100%;min-height:64px;display:flex;align-items:center;justify-content:space-between;
    gap:20px;padding:16px 4px;text-align:left;
    font-size:16px;font-weight:600;color:var(--text-hi);transition:color .2s ease;
  }
  .faq-q:hover{color:var(--neon)}
  .faq-icon{
    flex:none;width:26px;height:26px;border-radius:50%;
    border:1px solid var(--line-strong);position:relative;
    transition:transform .25s ease,border-color .25s ease,background .25s ease;
  }
  .faq-icon::before,.faq-icon::after{
    content:"";position:absolute;left:50%;top:50%;background:var(--text-mid);
    transform:translate(-50%,-50%);transition:background .2s ease;
  }
  .faq-icon::before{width:11px;height:1.5px}
  .faq-icon::after{width:1.5px;height:11px}
  .faq-item.open .faq-icon{transform:rotate(90deg);border-color:var(--neon);background:var(--neon-dim)}
  .faq-item.open .faq-icon::before,.faq-item.open .faq-icon::after{background:var(--neon)}
  .faq-item.open .faq-icon::after{opacity:0}
  .faq-a{max-height:0;overflow:hidden;transition:max-height .32s ease}
  .faq-a p{padding:0 4px 22px;font-size:15px;line-height:1.85;color:var(--text-mid);max-width:720px}

  /* ============ CTA ============ */
  .cta-wrap{padding:0 32px 96px}
  .cta-band{
    position:relative;max-width:1200px;margin:0 auto;
    background:var(--ink-800);border-radius:var(--r-panel);
    padding:44px 48px;display:flex;align-items:center;justify-content:space-between;
    gap:28px;flex-wrap:wrap;
  }
  .cta-band::before{
    content:"";position:absolute;inset:0;border-radius:var(--r-panel);padding:1px;
    background:linear-gradient(90deg,rgba(35,230,192,.65),rgba(139,92,246,.45) 55%,rgba(35,230,192,.12));
    -webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);
    -webkit-mask-composite:xor;mask-composite:exclude;pointer-events:none;
  }
  .cta-band h2{font-size:1.65rem;line-height:1.35;font-weight:700;color:var(--text-hi);max-width:560px}
  .cta-band .cta-note{margin-top:10px;font-size:14px;color:var(--text-low)}
  .cta-actions{display:flex;gap:12px;flex-wrap:wrap}
  @media (max-width:768px){
    .cta-wrap{padding:0 20px 64px}
    .cta-band{padding:30px 24px}
    .cta-band h2{font-size:1.35rem}
    .cta-actions{width:100%}
    .cta-actions .btn{flex:1 1 100%}
  }

  /* ============ 页脚 ============ */
  .site-footer{border-top:1px solid var(--line);background:var(--ink-800);padding:64px 0 28px}
  .footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.3fr;gap:36px}
  .footer-col{padding-right:24px}
  .footer-col + .footer-col{border-left:1px solid var(--line);padding-left:28px}
  .footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:16px}
  .footer-col h3{font-size:14px;font-weight:600;color:var(--text-hi);margin-bottom:16px;letter-spacing:.02em}
  .footer-col p{font-size:14px;line-height:1.8;color:var(--text-mid)}
  .footer-col ul{display:flex;flex-direction:column;gap:11px}
  .footer-col ul a{font-size:14px;color:var(--text-mid);transition:color .2s ease}
  .footer-col ul a:hover{color:var(--neon)}
  .sub-form{display:flex;flex-direction:column;gap:12px}
  .sub-form label{font-size:14px;color:var(--text-mid)}
  .sub-form input{
    height:48px;padding:0 16px;border-radius:var(--r-btn);
    background:var(--ink-600);border:1px solid var(--line);color:var(--text-hi);
    transition:border-color .2s ease,box-shadow .2s ease;
  }
  .sub-form input::placeholder{color:var(--text-low)}
  .sub-form input:focus{outline:none;border-color:var(--neon);box-shadow:0 0 0 3px rgba(35,230,192,.16)}
  .footer-bottom{
    margin-top:44px;padding-top:22px;border-top:1px solid var(--line);
    display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
    font-size:13px;color:var(--text-low);
  }
  @media (max-width:1024px){
    .footer-grid{grid-template-columns:1fr 1fr}
    .footer-col{padding-right:0}
    .footer-col + .footer-col{border-left:0;padding-left:0}
  }
  @media (max-width:560px){
    .footer-grid{grid-template-columns:1fr;gap:28px}
  }

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

  @media (max-width:1024px){
    .nav-desktop,.header-cta{display:none}
    .burger{display:flex}
  }
  @media (max-width:768px){
    .brand-sub{display:none}
    .brand-name{font-size:14px}
  }

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