/* roulang page: index */
:root{
  --bg-0:#05070E; --bg-1:#0A0F1C; --bg-2:#0F1626;
  --glass:rgba(255,255,255,.045);
  --pri:#4C6FFF; --pri-strong:#2F55E8;
  --pulse:#34E5D0; --hot:#FF4D8D;
  --tx-0:#EAF0FF; --tx-1:#A9B6D3; --tx-2:#6C7A99;
  --line:rgba(255,255,255,.08); --line-2:rgba(255,255,255,.16);
  --glow:0 0 0 1px rgba(76,111,255,.35),0 14px 40px -14px rgba(76,111,255,.55);
  --glow-sm:0 0 18px -6px rgba(76,111,255,.6);
  --r-card:16px; --r-sm:12px; --r-img:14px;
  --shadow-card:0 8px 30px -18px rgba(0,0,0,.9);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0; background:var(--bg-0); color:var(--tx-1);
  font-family:Inter,"MiSans","HarmonyOS Sans","PingFang SC","Noto Sans SC","Microsoft YaHei",system-ui,sans-serif;
  font-size:16px; line-height:1.9; letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none;transition:color .2s ease-out}
button,input{font:inherit}
button{cursor:pointer;border:0;background:none;color:inherit}
h1,h2,h3,h4{margin:0;color:var(--tx-0);font-weight:700;letter-spacing:-.02em}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum" 1}
.container-x{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
@media(min-width:768px){.container-x{padding:0 32px}}
@media(min-width:1024px){.container-x{padding:0 40px}}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(5,7,14,.72);
  -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;height:64px}
@media(min-width:1024px){.nav-wrap{height:72px}}
.brand{display:flex;align-items:center;gap:10px;color:var(--tx-0);font-weight:700;letter-spacing:-.01em}
.brand-mark{width:10px;height:10px;border-radius:50%;background:var(--pulse);box-shadow:0 0 14px -2px var(--pulse);flex:none}
.brand-name{font-size:15px;white-space:nowrap}
@media(min-width:1024px){.brand-name{font-size:16px}}
.nav-links{display:none;align-items:center;gap:28px}
@media(min-width:1024px){.nav-links{display:flex}}
.nav-link{
  position:relative;font-size:14px;color:var(--tx-1);padding:6px 0;white-space:nowrap;
}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:1px;background:var(--pulse);
  transform:scaleX(0);transform-origin:left;transition:transform .25s ease-out;
}
.nav-link:hover{color:var(--tx-0)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.active{color:var(--tx-0)}
.nav-link.active::after{transform:scaleX(1)}
.nav-link.active::before{
  content:"";position:absolute;left:-12px;top:50%;width:4px;height:4px;border-radius:50%;
  background:var(--pri);transform:translateY(-50%);
}
.nav-cta{
  display:none;align-items:center;gap:8px;font-size:13px;color:var(--tx-0);
  border:1px solid rgba(255,255,255,.18);border-radius:999px;padding:8px 16px;
  transition:border-color .2s ease-out,background .2s ease-out,color .2s ease-out;
}
@media(min-width:1024px){.nav-cta{display:inline-flex}}
.nav-cta:hover{border-color:var(--pulse);color:#fff;background:rgba(52,229,208,.06)}
.burger{display:inline-flex;flex-direction:column;justify-content:center;gap:5px;width:40px;height:40px;align-items:center}
@media(min-width:1024px){.burger{display:none}}
.burger span{display:block;width:20px;height:1.5px;background:var(--tx-0);border-radius:2px;transition:transform .25s ease-out,opacity .2s}
.drawer{
  position:fixed;inset:0;z-index:80;background:rgba(5,7,14,.94);
  -webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);
  display:flex;flex-direction:column;padding:20px 24px 40px;
  transform:translateY(-12px);opacity:0;pointer-events:none;transition:opacity .25s ease-out,transform .25s ease-out;
}
.drawer.open{opacity:1;transform:translateY(0);pointer-events:auto}
.drawer-top{display:flex;align-items:center;justify-content:space-between;height:44px;margin-bottom:24px}
.drawer-close{width:40px;height:40px;display:grid;place-items:center;border:1px solid var(--line);border-radius:50%;color:var(--tx-0)}
.drawer a.d-link{
  display:flex;align-items:center;height:56px;font-size:17px;color:var(--tx-1);
  border-bottom:1px solid var(--line);opacity:0;transform:translateY(6px);
}
.drawer.open a.d-link{animation:dIn .38s ease-out forwards}
.drawer.open a.d-link:nth-child(1){animation-delay:.04s}
.drawer.open a.d-link:nth-child(2){animation-delay:.10s}
.drawer.open a.d-link:nth-child(3){animation-delay:.16s}
.drawer.open a.d-link:nth-child(4){animation-delay:.22s}
.drawer.open a.d-link:nth-child(5){animation-delay:.28s}
.drawer.open a.d-link:nth-child(6){animation-delay:.34s}
@keyframes dIn{to{opacity:1;transform:translateY(0)}}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:999px;font-size:15px;font-weight:600;
  transition:transform .2s ease-out,box-shadow .2s ease-out,background .2s ease-out,border-color .2s ease-out,color .2s ease-out;
}
.btn:active{transform:scale(.985)}
.btn-pri{background:var(--pri);color:#fff;box-shadow:var(--glow)}
.btn-pri:hover{background:#5B7BFF;box-shadow:0 0 0 1px rgba(76,111,255,.45),0 18px 46px -14px rgba(76,111,255,.75)}
.btn-pri:active{background:var(--pri-strong);box-shadow:none}
.btn-ghost{border:1px solid rgba(255,255,255,.18);color:var(--tx-0);background:transparent}
.btn-ghost:hover{border-color:var(--pulse);color:#fff;background:rgba(52,229,208,.06)}
.btn-sm{height:42px;padding:0 18px;font-size:14px}
.btn:focus-visible,a:focus-visible,button:focus-visible,input:focus-visible{outline:2px solid var(--pri);outline-offset:2px}
.link-arrow{color:var(--pri);font-size:14px;display:inline-flex;align-items:center;gap:6px}
.link-arrow:hover{color:#7C97FF;text-decoration:underline;text-underline-offset:4px}

/* ---------- cards ---------- */
.card{
  position:relative;background:var(--glass);border:1px solid rgba(255,255,255,.10);
  -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
  border-radius:var(--r-card);box-shadow:var(--shadow-card);overflow:hidden;
  transition:transform .2s ease-out,border-color .2s ease-out,box-shadow .2s ease-out,background .2s ease-out;
}
.card::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,var(--pulse),transparent);
  opacity:0;transition:opacity .25s ease-out;
}
.card:hover{transform:translateY(-2px);border-color:var(--line-2);box-shadow:0 16px 44px -18px rgba(0,0,0,1)}
.card:hover::before{opacity:.9}
.card:active{transform:scale(.985)}
.badge{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:999px;
  font-size:12px;letter-spacing:.02em;background:rgba(76,111,255,.12);color:#9DB2FF;
  border:1px solid rgba(76,111,255,.18);
}
.badge-hot{background:rgba(255,77,141,.14);color:#FF8DB4;border-color:rgba(255,77,141,.24)}
.micro{font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--tx-2)}

/* ---------- hero ---------- */
.hero{position:relative;overflow:hidden;min-height:60vh;display:flex;align-items:center}
@media(min-width:1024px){.hero{min-height:74vh}}
.hero-bg{position:absolute;inset:0}
.hero-bg img{width:100%;height:100%;object-fit:cover;object-position:center}
.hero-bg::after{content:"";position:absolute;inset:0;background:rgba(5,7,14,.75)}
.hero-grid{
  position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);
  background-size:64px 64px;
  -webkit-mask-image:radial-gradient(circle at 28% 42%,#000,transparent 74%);
  mask-image:radial-gradient(circle at 28% 42%,#000,transparent 74%);
}
.hero-inner{position:relative;z-index:2;width:100%;padding:88px 0 72px}
@media(min-width:1024px){.hero-inner{padding:120px 0 96px}}
.hero-copy{max-width:720px}
.hero h1{font-size:clamp(2.1rem,4.6vw,3.5rem);line-height:1.18;margin-bottom:16px}
.hero-sub{max-width:620px;font-size:18px;line-height:1.75;color:var(--tx-1)}
@media(min-width:768px){.hero-sub{font-size:20px}}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}
.hero-card{
  background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.12);
  border-radius:var(--r-card);padding:22px;backdrop-filter:blur(14px);
}
.hero-card li{display:flex;justify-content:space-between;gap:12px;padding:12px 0;border-bottom:1px dashed var(--line);font-size:14px;color:var(--tx-1)}
.hero-card li:last-child{border-bottom:0}
.hero-card b{color:var(--tx-0);font-weight:600;font-variant-numeric:tabular-nums}
.wave{display:flex;align-items:flex-end;gap:5px;height:30px;opacity:.34;margin-top:48px}
.wave span{width:3px;border-radius:3px;background:linear-gradient(180deg,var(--pulse),rgba(76,111,255,.2));animation:pulseW 2.8s ease-in-out infinite}
.wave span:nth-child(1){height:40%;animation-delay:0s}
.wave span:nth-child(2){height:75%;animation-delay:.18s}
.wave span:nth-child(3){height:30%;animation-delay:.36s}
.wave span:nth-child(4){height:95%;animation-delay:.54s}
.wave span:nth-child(5){height:55%;animation-delay:.72s}
.wave span:nth-child(6){height:80%;animation-delay:.9s}
.wave span:nth-child(7){height:35%;animation-delay:1.08s}
@keyframes pulseW{0%,100%{transform:scaleY(.55)}50%{transform:scaleY(1)}}
@media(max-width:767px){.wave{display:none}}

/* ---------- sections ---------- */
.section{padding:56px 0}
@media(min-width:768px){.section{padding:72px 0}}
@media(min-width:1024px){.section{padding:96px 0}}
.section-alt{background:var(--bg-1);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:32px}
.sec-head h2{font-size:clamp(1.6rem,2.6vw,2.25rem);line-height:1.3}
.sec-desc{margin-top:12px;font-size:15px;color:var(--tx-2);max-width:640px}
.divider{height:1px;background:var(--line);border:0;margin:0}

/* ---------- collections ---------- */
.col-grid{display:grid;grid-template-columns:1fr;gap:20px}
@media(min-width:640px){.col-grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1024px){.col-grid{grid-template-columns:repeat(5,1fr);gap:18px}}
.col-card{padding:22px 20px;display:flex;flex-direction:column;gap:10px;min-height:190px}
.col-num{font-size:13px;color:var(--pulse);letter-spacing:.14em;font-variant-numeric:tabular-nums}
.col-card h3{font-size:17px;line-height:1.4}
.col-card p{font-size:14px;line-height:1.7;color:var(--tx-2)}
.col-foot{margin-top:auto;font-size:12px;color:var(--tx-2);display:flex;align-items:center;justify-content:space-between}

/* ---------- featured ---------- */
.feat-grid{display:grid;grid-template-columns:1fr;gap:20px}
@media(min-width:1024px){.feat-grid{grid-template-columns:7fr 5fr;gap:24px}}
.feat-main .thumb{aspect-ratio:16/9;border-radius:var(--r-img);overflow:hidden;background:var(--bg-2);border:1px solid var(--line)}
.feat-main .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease-out}
.feat-main:hover .thumb img{transform:scale(1.03)}
.feat-main .body{padding:22px 4px 4px}
.feat-side{display:flex;flex-direction:column;gap:20px}
.feat-small{display:grid;grid-template-columns:130px 1fr;gap:16px;padding:16px;align-items:center}
.feat-small .thumb{aspect-ratio:3/2;border-radius:10px;overflow:hidden;background:var(--bg-2);border:1px solid var(--line)}
.feat-small .thumb img{width:100%;height:100%;object-fit:cover}
.feat-small h3{font-size:16px;line-height:1.45;margin-bottom:6px}
.clamp1{display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden}
.clamp2{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.clamp3{display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}

/* ---------- list rows ---------- */
.post-list{border-top:1px solid var(--line)}
.post-row{
  position:relative;display:grid;grid-template-columns:96px 1fr;gap:16px;
  align-items:center;padding:16px 0;border-bottom:1px solid var(--line);
  transition:background .2s ease-out;
}
@media(min-width:768px){
  .post-row{grid-template-columns:96px 1fr auto;gap:20px;padding:18px 12px;min-height:88px}
}
.post-row::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:2px;background:var(--pulse);
  opacity:0;transition:opacity .2s ease-out;
}
.post-row:hover{background:rgba(255,255,255,.03)}
.post-row:hover::before{opacity:1}
.post-thumb{width:96px;height:64px;border-radius:10px;overflow:hidden;background:var(--bg-2);border:1px solid var(--line);flex:none}
.post-thumb img{width:100%;height:100%;object-fit:cover}
.post-title{font-size:16px;font-weight:600;color:var(--tx-0);line-height:1.5;transition:color .2s}
.post-row:hover .post-title{color:#fff}
.post-sum{margin-top:6px;font-size:14px;color:var(--tx-2)}
.post-meta{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--tx-2);font-variant-numeric:tabular-nums}
@media(min-width:768px){.post-meta{flex-direction:column;align-items:flex-end;gap:8px}}
.empty-card{
  margin:8px 0;padding:40px 24px;text-align:center;border-radius:var(--r-card);
  background:var(--glass);border:1px solid rgba(255,255,255,.10);backdrop-filter:blur(14px);
}
.empty-card p{color:var(--tx-1);font-size:15px;margin-bottom:18px}

/* ---------- text list ---------- */
.text-grid{display:grid;grid-template-columns:1fr;gap:0 32px}
@media(min-width:768px){.text-grid{grid-template-columns:repeat(2,1fr)}}
.text-item{
  display:flex;gap:14px;align-items:flex-start;padding:16px 8px;border-bottom:1px dashed var(--line);
  transition:background .2s ease-out;
}
.text-item:hover{background:rgba(255,255,255,.03)}
.text-item .idx{font-size:13px;color:var(--pulse);font-variant-numeric:tabular-nums;padding-top:3px;flex:none}
.text-item h3{font-size:16px;font-weight:600;line-height:1.5}
.text-item span.cat{display:block;margin-top:6px;font-size:13px;color:var(--tx-2)}

/* ---------- faq ---------- */
.faq{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  text-align:left;padding:22px 4px;font-size:16px;font-weight:600;color:var(--tx-0);
  transition:color .2s ease-out;
}
.faq-q:hover{color:#fff}
.faq-sign{position:relative;width:16px;height:16px;flex:none}
.faq-sign::before,.faq-sign::after{content:"";position:absolute;background:var(--pulse);border-radius:2px;transition:transform .25s ease-out,opacity .2s}
.faq-sign::before{left:0;top:7.5px;width:16px;height:1.5px}
.faq-sign::after{top:0;left:7.5px;width:1.5px;height:16px}
.faq-item.open .faq-sign::after{transform:scaleY(0);opacity:0}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease-out}
.faq-a-inner{padding:0 4px 24px;font-size:15px;line-height:1.8;color:var(--tx-1);background:var(--bg-1);border-radius:0 0 10px 10px;padding-left:16px;padding-right:16px}

/* ---------- cta ---------- */
.cta-bar{
  display:flex;flex-direction:column;gap:20px;
  background:var(--glass);border:1px solid rgba(255,255,255,.10);border-radius:var(--r-card);
  padding:26px;backdrop-filter:blur(14px);
}
@media(min-width:768px){.cta-bar{flex-direction:row;align-items:center;justify-content:space-between;padding:28px 32px}}
.cta-bar p{color:var(--tx-0);font-size:17px;font-weight:600}
.cta-actions{display:flex;flex-direction:column;gap:12px}
@media(min-width:768px){.cta-actions{flex-direction:row;gap:14px}}
@media(max-width:767px){.cta-actions .btn{width:100%}}

/* ---------- footer ---------- */
.site-footer{background:var(--bg-1);border-top:1px solid var(--line);padding:56px 0 0;margin-top:0}
.foot-grid{display:grid;grid-template-columns:1fr;gap:32px}
@media(min-width:640px){.foot-grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1024px){.foot-grid{grid-template-columns:2fr 1fr 1fr 1.4fr}}
.foot-title{font-size:14px;font-weight:600;color:var(--tx-0);margin-bottom:16px;letter-spacing:.02em}
.foot-list li{margin-bottom:10px}
.foot-list a{font-size:14px;color:var(--tx-1)}
.foot-list a:hover{color:var(--tx-0)}
.foot-desc{font-size:14px;color:var(--tx-2);margin-top:12px;max-width:300px;line-height:1.8}
.sub-form{display:flex;flex-direction:column;gap:12px}
@media(min-width:520px){.sub-form{flex-direction:row}}
.sub-form input{
  flex:1;height:48px;padding:14px 16px;border-radius:12px;background:var(--bg-1);
  border:1px solid var(--line);color:var(--tx-0);transition:border-color .2s,box-shadow .2s;
}
.sub-form input::placeholder{color:var(--tx-2)}
.sub-form input:focus{outline:none;border-color:var(--pri);box-shadow:var(--glow-sm)}
.sub-note{font-size:12px;color:var(--tx-2);margin-top:10px}
.foot-bottom{
  margin-top:44px;border-top:1px solid var(--line);padding:22px 0 28px;
  display:flex;flex-direction:column;gap:10px;font-size:13px;color:var(--tx-2);
}
@media(min-width:768px){.foot-bottom{flex-direction:row;align-items:center;justify-content:space-between}}
.toast{
  position:fixed;left:50%;bottom:32px;transform:translate(-50%,12px);opacity:0;pointer-events:none;
  background:var(--bg-2);border:1px solid var(--line-2);color:var(--tx-0);
  padding:12px 20px;border-radius:999px;font-size:14px;z-index:90;transition:opacity .25s,transform .25s;
}
.toast.show{opacity:1;transform:translate(-50%,0)}
@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important}
  .wave{display:none}
}

/* roulang page: article */
:root{
  --bg-0:#05070E;
  --bg-1:#0A0F1C;
  --bg-2:#0F1626;
  --glass:rgba(255,255,255,.045);
  --pri:#4C6FFF;
  --pri-strong:#2F55E8;
  --pulse:#34E5D0;
  --hot:#FF4D8D;
  --tx-0:#EAF0FF;
  --tx-1:#A9B6D3;
  --tx-2:#6C7A99;
  --line:rgba(255,255,255,.08);
  --line-2:rgba(255,255,255,.16);
  --glow:0 0 0 1px rgba(76,111,255,.35), 0 14px 40px -14px rgba(76,111,255,.55);
  --glow-sm:0 0 18px -6px rgba(76,111,255,.6);
  --r-card:16px;
  --r-sm:12px;
  --r-img:14px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:Inter,"MiSans","HarmonyOS Sans","PingFang SC","Noto Sans SC","Microsoft YaHei",system-ui,sans-serif;
  font-size:16px;
  line-height:1.9;
  color:var(--tx-1);
  background-color:var(--bg-0);
  background-image:
    radial-gradient(1100px 560px at 72% -12%, rgba(76,111,255,.14), transparent 62%),
    radial-gradient(760px 420px at 8% 6%, rgba(52,229,208,.07), transparent 65%),
    linear-gradient(rgba(255,255,255,.018) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.018) 1px, transparent 1px);
  background-size:auto, auto, 64px 64px, 64px 64px;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block;border-style:none}
a{color:inherit;text-decoration:none}
button{font:inherit;cursor:pointer;border:none;background:none;color:inherit}
input{font:inherit}
h1,h2,h3,h4{margin:0;color:var(--tx-0);font-weight:700;letter-spacing:-.02em}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--pri);outline-offset:2px}

.container-x{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding-left:20px;
  padding-right:20px;
}
@media (min-width:768px){
  .container-x{padding-left:32px;padding-right:32px}
}
@media (min-width:1024px){
  .container-x{padding-left:40px;padding-right:40px}
}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:50;
  background:rgba(5,7,14,.72);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.nav-wrap{
  display:flex;
  align-items:center;
  justify-content:space-between;
  height:64px;
  gap:20px;
}
@media (min-width:1024px){
  .nav-wrap{height:72px}
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  color:var(--tx-0);
  font-weight:600;
  letter-spacing:-.01em;
  flex:0 0 auto;
}
.brand-mark{
  width:12px;
  height:12px;
  border-radius:3px;
  background:linear-gradient(135deg,var(--pulse),var(--pri));
  box-shadow:0 0 14px -2px rgba(52,229,208,.75);
  flex:0 0 auto;
}
.brand-name{font-size:1.02rem;white-space:nowrap}
.nav-links{display:none}
@media (min-width:1024px){
  .nav-links{display:flex;align-items:center;gap:26px}
}
.nav-link{
  position:relative;
  font-size:14px;
  color:var(--tx-1);
  padding:6px 2px;
  transition:color .2s ease-out;
  white-space:nowrap;
}
.nav-link::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:0;
  height:1px;
  background:var(--pulse);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .22s ease-out;
}
.nav-link:hover{color:var(--tx-0)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.active{color:var(--tx-0)}
.nav-link.active::after{transform:scaleX(1)}
.nav-cta{
  display:none;
  align-items:center;
  height:36px;
  padding:0 16px;
  border-radius:999px;
  border:1px solid var(--line-2);
  background:rgba(255,255,255,.03);
  font-size:13px;
  color:var(--tx-0);
  transition:border-color .2s ease-out, background .2s ease-out, color .2s ease-out;
}
@media (min-width:768px){
  .nav-cta{display:inline-flex}
}
.nav-cta:hover{
  border-color:var(--pulse);
  color:#fff;
  background:rgba(52,229,208,.06);
}
.burger{
  display:inline-flex;
  flex-direction:column;
  justify-content:center;
  gap:5px;
  width:40px;height:40px;
  border-radius:10px;
  border:1px solid var(--line);
  padding:0 10px;
  transition:border-color .2s ease-out;
}
.burger span{
  display:block;
  height:1.5px;
  width:100%;
  background:var(--tx-0);
  border-radius:2px;
}
.burger:hover{border-color:var(--line-2)}
@media (min-width:1024px){
  .burger{display:none}
}
.drawer{
  position:fixed;
  inset:0;
  z-index:60;
  background:rgba(5,7,14,.95);
  backdrop-filter:blur(18px);
  -webkit-backdrop-filter:blur(18px);
  padding:18px 22px 32px;
  display:flex;
  flex-direction:column;
  opacity:0;
  pointer-events:none;
  transition:opacity .25s ease-out;
}
.drawer.open{opacity:1;pointer-events:auto}
.drawer-top{
  display:flex;
  align-items:center;
  justify-content:space-between;
  height:64px;
  border-bottom:1px solid var(--line);
}
.drawer-close{
  width:40px;height:40px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  border-radius:10px;
  border:1px solid var(--line);
  color:var(--tx-1);
  font-size:18px;
  line-height:1;
  transition:border-color .2s ease-out,color .2s ease-out;
}
.drawer-close:hover{border-color:var(--pulse);color:var(--tx-0)}
.drawer-nav{display:flex;flex-direction:column;padding-top:10px}
.drawer-link{
  display:flex;
  align-items:center;
  height:56px;
  border-bottom:1px solid var(--line);
  color:var(--tx-1);
  font-size:16px;
  opacity:0;
  transform:translateY(8px);
  transition:opacity .3s ease-out, transform .3s ease-out, color .2s ease-out;
}
.drawer-link:hover{color:var(--tx-0)}
.drawer.open .drawer-link{opacity:1;transform:none}
.drawer.open .drawer-link:nth-child(1){transition-delay:.06s}
.drawer.open .drawer-link:nth-child(2){transition-delay:.12s}
.drawer.open .drawer-link:nth-child(3){transition-delay:.18s}
.drawer.open .drawer-link:nth-child(4){transition-delay:.24s}
.drawer.open .drawer-link:nth-child(5){transition-delay:.30s}
.drawer.open .drawer-link:nth-child(6){transition-delay:.36s}

/* ---------- 页头带 ---------- */
.page-hero{
  position:relative;
  padding:36px 0 48px;
  background-image:url('/assets/images/backpic/back-2.png');
  background-size:cover;
  background-position:center;
  background-repeat:no-repeat;
  border-bottom:1px solid var(--line);
}
.page-hero::before{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg, rgba(5,7,14,.84), rgba(5,7,14,.93)), rgba(5,7,14,.72);
}
.page-hero .container-x{position:relative;z-index:1}
.crumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:12px;
  color:var(--tx-2);
  letter-spacing:.02em;
}
.crumb a{transition:color .2s ease-out}
.crumb a:hover{color:var(--pri)}
.crumb .sep{color:rgba(255,255,255,.18)}
.crumb .crumb-now{
  color:var(--tx-0);
  max-width:min(58vw,460px);
  overflow:hidden;
  text-overflow:ellipsis;
  white-space:nowrap;
}
.hero-tag{
  display:inline-flex;
  align-items:center;
  gap:8px;
  margin-top:22px;
  padding:5px 14px;
  border-radius:999px;
  font-size:12px;
  letter-spacing:.1em;
  color:var(--pri);
  background:rgba(76,111,255,.12);
  border:1px solid rgba(76,111,255,.22);
}
.hero-tag i{
  width:6px;height:6px;border-radius:50%;
  background:var(--pulse);
  box-shadow:0 0 10px rgba(52,229,208,.8);
  font-style:normal;
}
.page-hero h1{
  margin-top:18px;
  font-size:clamp(1.85rem,4.2vw,2.85rem);
  line-height:1.25;
  letter-spacing:-.02em;
  max-width:900px;
}
.meta-row{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:12px;
  margin-top:18px;
  font-size:14px;
  color:var(--tx-2);
}
.meta-row .dot{
  width:1px;
  height:12px;
  background:rgba(255,255,255,.16);
  display:inline-block;
}
.meta-row strong{
  color:var(--tx-1);
  font-weight:500;
}

/* ---------- 封面与正文 ---------- */
.main-wrap{padding:44px 0 0}
.cover-box{
  max-width:860px;
  margin:0 auto;
  border-radius:var(--r-card);
  overflow:hidden;
  border:1px solid var(--line);
  background:var(--bg-2);
  box-shadow:0 8px 30px -18px rgba(0,0,0,.9);
}
.cover-box img{
  width:100%;
  aspect-ratio:16 / 9;
  object-fit:cover;
  border-radius:0;
}
.article-shell{
  display:grid;
  grid-template-columns:1fr;
  gap:40px;
  max-width:1120px;
  margin:0 auto;
  padding-top:40px;
}
@media (min-width:1024px){
  .article-shell{grid-template-columns:minmax(0,1fr) 180px}
}
.article-body{
  max-width:760px;
  width:100%;
  margin:0 auto;
  font-size:17px;
  line-height:1.9;
  color:var(--tx-1);
}
.article-body p{margin-bottom:20px}
.article-body h2{
  font-size:1.5rem;
  font-weight:700;
  color:var(--tx-0);
  margin:48px 0 16px;
  letter-spacing:-.015em;
  scroll-margin-top:96px;
}
.article-body h3{
  font-size:1.2rem;
  font-weight:600;
  color:var(--tx-0);
  margin:32px 0 12px;
}
.article-body h4{
  font-size:1.05rem;
  font-weight:600;
  color:var(--tx-0);
  margin:26px 0 10px;
}
.article-body ul,
.article-body ol{
  margin:0 0 22px;
  padding:0;
}
.article-body li{
  position:relative;
  padding-left:20px;
  margin-bottom:10px;
  line-height:1.85;
}
.article-body ul > li::before{
  content:"";
  position:absolute;
  left:0;
  top:.72em;
  width:6px;height:6px;
  border-radius:1px;
  background:var(--pulse);
  box-shadow:0 0 8px rgba(52,229,208,.55);
}
.article-body ol{counter-reset:obitem}
.article-body ol > li{counter-increment:obitem}
.article-body ol > li::before{
  content:counter(obitem);
  position:absolute;
  left:0;
  top:.2em;
  font-size:12px;
  color:var(--pulse);
  font-variant-numeric:tabular-nums;
  font-weight:600;
}
.article-body blockquote{
  margin:28px 0;
  padding:20px 22px;
  background:var(--bg-1);
  border-left:2px solid var(--pulse);
  border-radius:0 var(--r-sm) var(--r-sm) 0;
  color:var(--tx-1);
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body a{
  color:var(--pri);
  text-decoration:underline;
  text-underline-offset:3px;
  transition:color .2s ease-out;
}
.article-body a:hover{color:var(--pulse)}
.article-body img{
  width:100%;
  border-radius:12px;
  margin:26px 0 10px;
  border:1px solid var(--line);
}
.article-body figcaption{
  font-size:14px;
  color:var(--tx-2);
  text-align:center;
  margin-bottom:24px;
}
.article-body code{
  background:var(--bg-1);
  border:1px solid var(--line);
  border-radius:6px;
  padding:2px 6px;
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-size:.9em;
  color:var(--pulse);
  font-variant-numeric:tabular-nums;
}
.article-body pre{
  background:var(--bg-1);
  border:1px solid var(--line);
  border-radius:var(--r-sm);
  padding:18px;
  overflow:auto;
  margin:24px 0;
}
.article-body pre code{background:none;border:none;padding:0;color:var(--tx-1)}
.article-body hr{
  border:none;
  height:1px;
  background:var(--line);
  margin:40px 0;
}
.article-body strong{color:var(--tx-0);font-weight:600}
.article-body table{
  width:100%;
  border-collapse:collapse;
  margin:24px 0;
  font-size:15px;
}
.article-body th,
.article-body td{
  padding:12px 14px;
  border-bottom:1px solid var(--line);
  text-align:left;
}
.article-body th{color:var(--tx-0);font-weight:600;background:rgba(255,255,255,.03)}

.toc-aside{display:none}
@media (min-width:1024px){
  .toc-aside{
    display:block;
    position:sticky;
    top:96px;
    align-self:start;
  }
}
.toc-title{
  font-size:12px;
  letter-spacing:.14em;
  color:var(--tx-2);
  margin-bottom:14px;
}
.toc-list{display:flex;flex-direction:column;gap:10px}
.toc-link{
  font-size:13px;
  line-height:1.6;
  color:var(--tx-2);
  border-left:2px solid transparent;
  padding-left:12px;
  transition:color .2s ease-out,border-color .2s ease-out;
}
.toc-link:hover{color:var(--pri);border-left-color:var(--pri)}

.empty-card{
  max-width:560px;
  margin:0 auto;
  padding:40px 28px;
  text-align:center;
  border-radius:var(--r-card);
  background:var(--glass);
  border:1px solid var(--line);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
}
.empty-title{font-size:1.1rem;font-weight:600;color:var(--tx-0)}
.empty-desc{font-size:14px;color:var(--tx-2);margin:10px 0 22px}

/* ---------- 通用板块 ---------- */
.sec{padding:56px 0}
@media (min-width:768px){.sec{padding:72px 0}}
@media (min-width:1024px){.sec{padding:88px 0}}
.sec-soft{border-top:1px solid var(--line)}
.sec-head{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  justify-content:space-between;
  gap:14px;
  margin-bottom:28px;
}
.sec-title{
  font-size:clamp(1.4rem,2.4vw,1.85rem);
  line-height:1.3;
}
.sec-sub{
  font-size:14px;
  color:var(--tx-2);
  margin-top:8px;
  max-width:640px;
}
.text-link{
  font-size:14px;
  color:var(--tx-1);
  border-bottom:1px solid transparent;
  transition:color .2s ease-out,border-color .2s ease-out;
}
.text-link:hover{color:var(--pri);border-bottom-color:var(--pri)}

/* ---------- 相关推荐列表 ---------- */
.rec-list{border-top:1px solid var(--line)}
.rec-item{
  display:grid;
  grid-template-columns:52px minmax(0,1fr) auto;
  align-items:center;
  gap:16px;
  padding:20px 16px;
  border-bottom:1px solid var(--line);
  transition:background .2s ease-out, box-shadow .2s ease-out, transform .2s ease-out;
}
.rec-item:hover{
  background:rgba(255,255,255,.03);
  box-shadow:inset 2px 0 0 var(--pulse);
}
.rec-num{
  font-size:14px;
  font-weight:600;
  color:var(--pulse);
  font-variant-numeric:tabular-nums;
}
.rec-title{
  font-size:16px;
  font-weight:600;
  color:var(--tx-0);
  overflow:hidden;
  text-overflow:ellipsis;
  white-space:nowrap;
}
.rec-desc{
  font-size:14px;
  color:var(--tx-2);
  margin-top:4px;
  overflow:hidden;
  text-overflow:ellipsis;
  white-space:nowrap;
}
.rec-meta{
  font-size:13px;
  color:var(--tx-2);
  font-variant-numeric:tabular-nums;
  white-space:nowrap;
}
@media (max-width:640px){
  .rec-item{grid-template-columns:34px minmax(0,1fr);align-items:start;gap:12px;padding:18px 12px}
  .rec-meta{grid-column:2;margin-top:6px}
  .rec-title{white-space:normal}
  .rec-desc{white-space:normal}
}
.back-link{
  display:inline-flex;
  align-items:center;
  gap:8px;
  margin-top:26px;
  font-size:14px;
  color:var(--tx-1);
  transition:color .2s ease-out;
}
.back-link:hover{color:var(--pulse)}

/* ---------- CTA ---------- */
.cta-bar{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  padding:26px;
  border-radius:var(--r-card);
  background:var(--glass);
  border:1px solid var(--line);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  box-shadow:0 8px 30px -18px rgba(0,0,0,.9);
}
.cta-text{
  font-size:1rem;
  color:var(--tx-0);
  font-weight:600;
}
.cta-note{
  font-size:14px;
  color:var(--tx-2);
  margin-top:6px;
}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}
@media (max-width:640px){
  .cta-bar{flex-direction:column;align-items:stretch}
  .cta-actions{flex-direction:column}
  .cta-actions .btn{width:100%}
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:48px;
  padding:0 24px;
  border-radius:999px;
  border:1px solid transparent;
  font-size:15px;
  font-weight:500;
  letter-spacing:.01em;
  transition:all .2s ease-out;
}
.btn:active{transform:scale(.985)}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.btn-pri{
  background:var(--pri);
  color:#fff;
  box-shadow:var(--glow);
}
.btn-pri:hover{
  filter:brightness(1.08);
  box-shadow:0 0 0 1px rgba(76,111,255,.5), 0 18px 48px -14px rgba(76,111,255,.75);
}
.btn-pri:active{
  background:var(--pri-strong);
  box-shadow:none;
}
.btn-ghost{
  border-color:rgba(255,255,255,.18);
  color:var(--tx-0);
  background:transparent;
}
.btn-ghost:hover{
  border-color:var(--pulse);
  color:#fff;
  background:rgba(52,229,208,.06);
}
.btn-ghost.is-on{
  border-color:var(--hot);
  color:#fff;
  background:rgba(255,77,141,.08);
}
.btn svg{flex:0 0 auto}

/* ---------- 页脚 ---------- */
.site-footer{
  border-top:1px solid var(--line);
  background:var(--bg-1);
  padding:56px 0 28px;
  margin-top:8px;
}
.foot-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:32px;
}
@media (min-width:768px){
  .foot-grid{grid-template-columns:1.4fr 1fr 1fr 1.25fr;gap:40px}
}
.foot-desc{
  font-size:14px;
  line-height:1.7;
  color:var(--tx-2);
  margin-top:14px;
  max-width:280px;
}
.foot-title{
  font-size:12px;
  letter-spacing:.14em;
  color:var(--tx-2);
  margin-bottom:16px;
}
.foot-list{display:grid;gap:10px}
.foot-list a{
  font-size:14px;
  color:var(--tx-1);
  transition:color .2s ease-out;
}
.foot-list a:hover{color:var(--tx-0)}
.sub-form{display:flex;gap:10px}
.sub-form input{
  flex:1 1 auto;
  min-width:0;
  height:48px;
  padding:0 16px;
  border-radius:12px;
  background:var(--bg-0);
  border:1px solid var(--line);
  color:var(--tx-0);
  font-size:14px;
  transition:border-color .2s ease-out, box-shadow .2s ease-out;
}
.sub-form input::placeholder{color:var(--tx-2)}
.sub-form input:focus{
  outline:none;
  border-color:var(--pri);
  box-shadow:var(--glow-sm);
}
.sub-note{
  font-size:12px;
  color:var(--tx-2);
  margin-top:10px;
  line-height:1.7;
}
@media (max-width:520px){
  .sub-form{flex-direction:column}
  .sub-form .btn{width:100%}
}
.foot-bottom{
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  align-items:center;
  justify-content:space-between;
  margin-top:38px;
  padding-top:20px;
  border-top:1px solid var(--line);
  font-size:13px;
  color:var(--tx-2);
}

@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *{animation:none !important;transition:none !important}
}

/* roulang page: category1 */
:root{
  --bg-0:#05070E; --bg-1:#0A0F1C; --bg-2:#0F1626; --glass:rgba(255,255,255,.045);
  --pri:#4C6FFF; --pri-strong:#2F55E8; --pulse:#34E5D0; --hot:#FF4D8D;
  --tx-0:#EAF0FF; --tx-1:#A9B6D3; --tx-2:#6C7A99;
  --line:rgba(255,255,255,.08); --line-2:rgba(255,255,255,.16);
  --glow:0 0 0 1px rgba(76,111,255,.35), 0 14px 40px -14px rgba(76,111,255,.55);
  --glow-sm:0 0 18px -6px rgba(76,111,255,.6);
  --r-card:16px; --r-sm:12px; --r-img:14px;
  --shadow-card:0 8px 30px -18px rgba(0,0,0,.9);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
.site-body{
  margin:0;background:var(--bg-0);color:var(--tx-1);
  font-family:Inter,"MiSans","HarmonyOS Sans","PingFang SC","Noto Sans SC","Microsoft YaHei",sans-serif;
  font-size:16px;line-height:1.9;-webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
h1,h2,h3,p,ul,ol{margin:0;padding:0}
ul,ol{list-style:none}
:focus-visible{outline:2px solid var(--pri);outline-offset:2px;border-radius:6px}
.container-x{width:100%;max-width:1200px;margin:0 auto;padding-left:20px;padding-right:20px}
@media (min-width:768px){.container-x{padding-left:32px;padding-right:32px}}
@media (min-width:1024px){.container-x{padding-left:40px;padding-right:40px}}
.section{padding:56px 0}
@media (min-width:768px){.section{padding:72px 0}}
@media (min-width:1024px){.section{padding:96px 0}}
.sec-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:32px}
.sec-h2{font-size:clamp(1.6rem,2.6vw,2.25rem);font-weight:700;color:var(--tx-0);letter-spacing:-.01em;line-height:1.3}
.sec-sub{font-size:14px;color:var(--tx-2);margin-top:10px;max-width:620px}
.link-more{font-size:14px;color:var(--tx-1);border-bottom:1px solid transparent;transition:color .2s,border-color .2s}
.link-more:hover{color:var(--pulse);border-bottom-color:var(--pulse)}

/* ===== 导航 ===== */
.site-header{
  position:sticky;top:0;z-index:60;background:rgba(5,7,14,.72);
  -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;gap:24px;height:64px}
@media (min-width:1024px){.nav-wrap{height:72px}}
.brand{display:inline-flex;align-items:center;gap:10px}
.brand-mark{width:10px;height:10px;border-radius:50%;background:var(--pulse);box-shadow:0 0 12px 2px rgba(52,229,208,.55);flex:none}
.brand-name{font-size:16px;font-weight:700;color:var(--tx-0);letter-spacing:.01em}
.nav-links{display:none}
@media (min-width:1024px){.nav-links{display:flex;align-items:center;gap:26px}}
.nav-link{position:relative;font-size:14px;color:var(--tx-1);padding:6px 0;transition:color .2s ease}
.nav-link::after{content:"";position:absolute;left:0;right:0;bottom:0;height:1px;background:var(--pulse);transform:scaleX(0);transform-origin:left;transition:transform .25s ease}
.nav-link:hover{color:var(--tx-0)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.active{color:var(--tx-0)}
.nav-link.active::after{transform:scaleX(1)}
.nav-link.active::before{content:"";position:absolute;left:-11px;top:50%;width:4px;height:4px;border-radius:50%;background:var(--hot);transform:translateY(-50%)}
.nav-cta{
  display:inline-flex;align-items:center;height:38px;padding:0 18px;border-radius:999px;
  border:1px solid rgba(255,255,255,.18);font-size:14px;color:var(--tx-0);transition:all .2s ease;
}
.nav-cta:hover{border-color:var(--pulse);background:rgba(52,229,208,.06)}
.burger{display:inline-flex;flex-direction:column;justify-content:center;gap:5px;width:38px;height:38px;padding:0 8px;border-radius:10px;border:1px solid var(--line)}
.burger span{display:block;height:1px;background:var(--tx-0);transition:transform .2s ease}
@media (min-width:1024px){.burger{display:none}}
@media (max-width:1023px){.nav-cta{display:none}}
.drawer{position:fixed;inset:0;z-index:90;display:none;flex-direction:column;padding:24px;
  background:rgba(5,7,14,.96);-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px)}
.drawer.open{display:flex}
.drawer-close{align-self:flex-end;width:40px;height:40px;font-size:26px;line-height:1;color:var(--tx-1);border:1px solid var(--line);border-radius:12px}
.drawer-nav{display:flex;flex-direction:column;margin-top:28px}
.drawer-nav a{display:flex;align-items:center;height:56px;font-size:17px;color:var(--tx-1);border-bottom:1px solid var(--line);
  opacity:0;transform:translateY(8px);animation:drawerIn .32s ease forwards}
.drawer-nav a.is-active{color:var(--tx-0)}
.drawer-nav a.is-active::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--hot);margin-right:10px}
.drawer-nav a:nth-child(1){animation-delay:.04s}
.drawer-nav a:nth-child(2){animation-delay:.10s}
.drawer-nav a:nth-child(3){animation-delay:.16s}
.drawer-nav a:nth-child(4){animation-delay:.22s}
.drawer-nav a:nth-child(5){animation-delay:.28s}
.drawer-nav a:nth-child(6){animation-delay:.34s}
@keyframes drawerIn{to{opacity:1;transform:translateY(0)}}

/* ===== 页头带 ===== */
.page-band{position:relative;overflow:hidden;border-bottom:1px solid var(--line);min-height:280px;display:flex;align-items:center}
.page-band::before{content:"";position:absolute;inset:0;background-image:url('/assets/images/backpic/back-2.png');background-size:cover;background-position:center;opacity:.55}
.page-band::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(5,7,14,.93) 0%,rgba(5,7,14,.76) 48%,rgba(5,7,14,.58) 100%)}
.band-inner{position:relative;z-index:2;padding:64px 0 52px;width:100%}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:12px;color:var(--tx-2);margin-bottom:20px}
.crumb a{transition:color .2s ease}
.crumb a:hover{color:var(--pri)}
.crumb .sep{color:var(--line-2)}
.crumb .now{color:var(--tx-0)}
.band-h1{font-size:clamp(2rem,4.2vw,3.1rem);font-weight:700;color:var(--tx-0);letter-spacing:-.02em;line-height:1.22;max-width:16em}
.band-sub{margin-top:16px;font-size:17px;line-height:1.7;color:var(--tx-1);max-width:600px}
.wave{display:none;margin-top:26px}
@media (min-width:768px){.wave{display:block}}
.wave svg{opacity:.34}

/* ===== 目录主体 ===== */
.idx-grid{display:grid;grid-template-columns:1fr;gap:32px}
@media (min-width:1024px){.idx-grid{grid-template-columns:240px 1fr;gap:56px}}
.anchor-col{align-self:start}
@media (min-width:1024px){.anchor-col{position:sticky;top:104px}}
.anchor-title{font-size:12px;letter-spacing:.14em;color:var(--tx-2);margin-bottom:14px}
.anchor-list a{display:block;padding:11px 0 11px 14px;border-left:1px solid var(--line);font-size:14px;color:var(--tx-2);transition:all .2s ease}
.anchor-list a:hover{color:var(--tx-0);border-left-color:var(--pulse);padding-left:18px}
.anchor-note{margin-top:24px;padding:16px;border-radius:var(--r-sm);background:var(--glass);border:1px solid rgba(255,255,255,.10);font-size:13px;line-height:1.75;color:var(--tx-2)}
.idx-list{border-bottom:1px solid var(--line)}
.idx-row{display:grid;grid-template-columns:44px 1fr 20px;gap:14px;align-items:center;padding:22px 12px;border-top:1px solid var(--line);transition:background .2s ease}
.idx-row:hover{background:rgba(255,255,255,.035)}
.idx-num{font-size:13px;letter-spacing:.12em;color:var(--pulse);font-variant-numeric:tabular-nums}
.idx-title{font-size:16px;font-weight:600;color:var(--tx-0);letter-spacing:.005em}
.idx-desc{font-size:14px;line-height:1.7;color:var(--tx-2);margin-top:6px}
.idx-arrow{color:var(--tx-2);transition:transform .2s ease,color .2s ease}
.idx-row:hover .idx-arrow{color:var(--pulse);transform:translateX(4px)}
@media (max-width:520px){.idx-row{grid-template-columns:36px 1fr 16px;padding:18px 8px}}

/* ===== 图文 / 列表 / 步骤 ===== */
.split{display:grid;grid-template-columns:1fr;gap:32px;align-items:center}
@media (min-width:1024px){.split{grid-template-columns:1.05fr .95fr;gap:64px}}
.split-img{border-radius:var(--r-card);overflow:hidden;border:1px solid var(--line);background:var(--bg-2)}
.split-img img{width:100%;aspect-ratio:16/9;object-fit:cover}
.body-p{font-size:16px;line-height:1.9;color:var(--tx-1);margin-top:16px;max-width:38em}
.mini-list{margin-top:22px;display:flex;flex-direction:column;gap:14px}
.mini-list li{display:flex;gap:12px;font-size:15px;color:var(--tx-1)}
.mini-list li::before{content:"";flex:none;width:8px;height:8px;margin-top:11px;background:var(--pulse);border-radius:2px}
.scene-row{display:flex;gap:20px;padding:24px 0;border-top:1px solid var(--line);transition:background .2s ease}
.scene-row:last-child{border-bottom:1px solid var(--line)}
.scene-row:hover{background:rgba(255,255,255,.03)}
.scene-no{flex:none;width:44px;font-size:13px;letter-spacing:.12em;color:var(--tx-2);font-variant-numeric:tabular-nums;padding-top:2px}
.scene-h3{font-size:16px;font-weight:600;color:var(--tx-0)}
.scene-p{font-size:14px;line-height:1.75;color:var(--tx-2);margin-top:6px;max-width:660px}
.path-grid{display:grid;grid-template-columns:1fr;gap:0}
@media (min-width:768px){.path-grid{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.path-grid{grid-template-columns:repeat(4,1fr)}}
.path-step{padding:24px 20px 8px 0;border-top:2px solid var(--line);transition:border-color .25s ease}
.path-step:hover{border-top-color:var(--pulse)}
.path-week{font-size:12px;letter-spacing:.14em;color:var(--pulse);font-variant-numeric:tabular-nums}
.path-h3{font-size:17px;font-weight:600;color:var(--tx-0);margin-top:10px}
.path-p{font-size:14px;line-height:1.75;color:var(--tx-2);margin-top:8px;max-width:24em}
.badge{display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:999px;font-size:12px;letter-spacing:.03em;background:rgba(76,111,255,.12);color:var(--pri)}
.badge-hot{background:rgba(255,77,141,.14);color:var(--hot)}

/* ===== FAQ ===== */
.faq-wrap{max-width:820px}
.faq-item{border-top:1px solid var(--line)}
.faq-item:last-child{border-bottom:1px solid var(--line)}
.faq-q{display:flex;align-items:center;justify-content:space-between;gap:16px;width:100%;text-align:left;padding:20px 4px;font-size:16px;font-weight:600;color:var(--tx-0);transition:color .2s ease}
.faq-q:hover{color:var(--pulse)}
.faq-sign{flex:none;position:relative;width:14px;height:14px}
.faq-sign::before,.faq-sign::after{content:"";position:absolute;background:var(--tx-2);transition:transform .25s ease,background .25s ease}
.faq-sign::before{left:0;right:0;top:6.5px;height:1px}
.faq-sign::after{top:0;bottom:0;left:6.5px;width:1px}
.faq-item.open .faq-sign::before{background:var(--pulse)}
.faq-item.open .faq-sign::after{transform:scaleY(0)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease}
.faq-item.open .faq-a{max-height:340px}
.faq-a p{padding:0 4px 22px;font-size:15px;line-height:1.85;color:var(--tx-1);max-width:42em}

/* ===== 推荐 / CTA ===== */
.rec-grid{display:grid;grid-template-columns:1fr;gap:0}
@media (min-width:768px){.rec-grid{grid-template-columns:repeat(3,1fr);gap:32px}}
.rec-item{padding:20px 0;border-top:1px solid var(--line)}
.rec-h3{font-size:15px;font-weight:600;color:var(--tx-0);line-height:1.6;transition:color .2s ease}
.rec-item:hover .rec-h3{color:var(--pulse)}
.rec-meta{font-size:13px;color:var(--tx-2);margin-top:8px}
.cta-bar{margin-top:8px;display:flex;flex-direction:column;gap:20px;padding:28px;border-radius:var(--r-card);
  background:var(--glass);border:1px solid rgba(255,255,255,.10);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px)}
@media (min-width:768px){.cta-bar{flex-direction:row;align-items:center;justify-content:space-between;padding:32px 36px}}
.cta-text{font-size:17px;font-weight:600;color:var(--tx-0)}
.cta-note{font-size:13px;color:var(--tx-2);margin-top:6px}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap}
@media (max-width:767px){.cta-actions{flex-direction:column}.cta-actions .btn{width:100%}}

/* ===== 按钮 ===== */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:48px;padding:0 26px;border-radius:999px;
  font-size:15px;font-weight:600;transition:all .2s ease-out;white-space:nowrap}
.btn-pri{background:var(--pri);color:#fff;box-shadow:var(--glow)}
.btn-pri:hover{filter:brightness(1.08);box-shadow:0 0 0 1px rgba(76,111,255,.45),0 18px 46px -14px rgba(76,111,255,.7)}
.btn-pri:active{background:var(--pri-strong);box-shadow:none;transform:scale(.985)}
.btn-ghost{border:1px solid rgba(255,255,255,.18);color:var(--tx-0)}
.btn-ghost:hover{border-color:var(--pulse);color:#fff;background:rgba(52,229,208,.06)}
.btn-ghost:active{transform:scale(.985)}
.btn-sm{height:40px;padding:0 18px;font-size:14px}

/* ===== 页脚 ===== */
.site-footer{margin-top:96px;border-top:1px solid var(--line);background:var(--bg-1)}
.foot-grid{display:grid;grid-template-columns:1fr;gap:32px;padding:64px 0 40px}
@media (min-width:768px){.foot-grid{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.foot-grid{grid-template-columns:1.4fr 1fr 1fr 1.5fr}}
.foot-desc{font-size:14px;line-height:1.8;color:var(--tx-2);margin-top:14px;max-width:24em}
.foot-title{font-size:12px;letter-spacing:.14em;color:var(--tx-2);margin-bottom:16px}
.foot-list li+li{margin-top:10px}
.foot-list a{font-size:14px;color:var(--tx-1);transition:color .2s ease}
.foot-list a:hover{color:var(--tx-0)}
.sub-form{display:flex;gap:10px;flex-wrap:wrap}
.sub-form input{flex:1 1 180px;height:48px;padding:14px 16px;border-radius:12px;background:var(--bg-0);
  border:1px solid var(--line);color:var(--tx-0);font-size:14px;transition:border-color .2s ease,box-shadow .2s ease}
.sub-form input::placeholder{color:var(--tx-2)}
.sub-form input:focus{outline:none;border-color:var(--pri);box-shadow:var(--glow-sm)}
.sub-note{font-size:13px;color:var(--tx-2);margin-top:12px}
.sub-msg{font-size:13px;color:var(--pulse);margin-top:10px;min-height:18px}
.foot-bottom{display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;padding:22px 0 32px;
  border-top:1px solid var(--line);font-size:13px;color:var(--tx-2)}
@media (prefers-reduced-motion: reduce){
  *{animation:none !important;transition:none !important;scroll-behavior:auto !important}
}

/* roulang page: category2 */
:root{
  --bg-0:#05070E;
  --bg-1:#0A0F1C;
  --bg-2:#0F1626;
  --glass:rgba(255,255,255,.045);
  --pri:#4C6FFF;
  --pri-strong:#2F55E8;
  --pulse:#34E5D0;
  --hot:#FF4D8D;
  --tx-0:#EAF0FF;
  --tx-1:#A9B6D3;
  --tx-2:#6C7A99;
  --line:rgba(255,255,255,.08);
  --line-2:rgba(255,255,255,.16);
  --glow:0 0 0 1px rgba(76,111,255,.35),0 14px 40px -14px rgba(76,111,255,.55);
  --glow-sm:0 0 18px -6px rgba(76,111,255,.6);
  --shadow:0 8px 30px -18px rgba(0,0,0,.9);
  --shadow-hover:0 18px 44px -20px rgba(0,0,0,.95);
  --r-card:16px;
  --r-sm:12px;
  --r-img:14px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg-0);
  color:var(--tx-1);
  font-family:Inter,"HarmonyOS Sans","PingFang SC","Noto Sans SC","Microsoft YaHei",system-ui,sans-serif;
  font-size:16px;
  line-height:1.9;
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
input{font:inherit}
h1,h2,h3{color:var(--tx-0);margin:0;line-height:1.3;letter-spacing:-.01em}
p{margin:0}
.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum"}
.container-x{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
@media(min-width:768px){.container-x{padding:0 32px}}
@media(min-width:1024px){.container-x{padding:0 40px}}

/* ============ 导航 ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(5,7,14,.72);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;height:64px;gap:16px}
@media(min-width:1024px){.nav-wrap{height:72px}}
.brand{display:inline-flex;align-items:center;gap:10px}
.brand-mark{width:10px;height:10px;border-radius:50%;background:var(--pulse);box-shadow:0 0 14px rgba(52,229,208,.9);flex:0 0 auto}
.brand-name{font-size:16px;font-weight:700;color:var(--tx-0);letter-spacing:-.01em;white-space:nowrap}
.nav-links{display:none}
@media(min-width:1024px){
  .nav-links{display:flex;align-items:center;gap:26px}
}
.nav-link{position:relative;font-size:14px;color:var(--tx-1);transition:color .2s ease}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:-7px;height:1px;background:var(--pulse);
  transform:scaleX(0);transform-origin:left;transition:transform .25s ease;
}
.nav-link:hover{color:var(--tx-0)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.active{color:var(--tx-0)}
.nav-link.active::after{transform:scaleX(1)}
.nav-link.active::before{
  content:"";position:absolute;left:-11px;top:50%;width:4px;height:4px;border-radius:50%;
  background:var(--pulse);transform:translateY(-50%);
}
@media(min-width:1024px) and (max-width:1140px){.nav-links{gap:18px}.nav-link{font-size:13px}}
.nav-cta{display:none}
@media(min-width:1024px){
  .nav-cta{
    display:inline-flex;align-items:center;height:36px;padding:0 16px;border-radius:999px;
    border:1px solid rgba(255,255,255,.18);font-size:13px;color:var(--tx-0);
    transition:border-color .2s ease,background .2s ease;
  }
  .nav-cta:hover{border-color:var(--pulse);background:rgba(52,229,208,.06)}
}
.burger{
  width:40px;height:40px;display:inline-flex;flex-direction:column;align-items:center;justify-content:center;
  gap:5px;border:1px solid var(--line);border-radius:10px;transition:border-color .2s ease;
}
.burger:hover{border-color:var(--line-2)}
.burger span{display:block;width:18px;height:1px;background:var(--tx-0);transition:transform .25s ease,opacity .2s ease}
.burger.open span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.burger.open span:nth-child(2){opacity:0}
.burger.open span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
@media(min-width:1024px){.burger{display:none}}
.nav-links.open{
  display:flex;flex-direction:column;align-items:stretch;gap:0;
  position:fixed;left:0;right:0;top:64px;bottom:0;
  background:rgba(5,7,14,.97);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  padding:12px 20px 40px;overflow-y:auto;border-top:1px solid var(--line);
  animation:fadeIn .2s ease-out both;
}
.nav-links.open .nav-link{
  height:56px;display:flex;align-items:center;font-size:16px;color:var(--tx-0);
  border-bottom:1px solid var(--line);
  animation:fadeUp .32s ease-out both;
}
.nav-links.open .nav-link::after{display:none}
.nav-links.open .nav-link.active::before{left:0;top:50%;width:4px;height:4px}
.nav-links.open .nav-link.active{padding-left:14px}
.nav-links.open .nav-link:nth-child(1){animation-delay:.04s}
.nav-links.open .nav-link:nth-child(2){animation-delay:.10s}
.nav-links.open .nav-link:nth-child(3){animation-delay:.16s}
.nav-links.open .nav-link:nth-child(4){animation-delay:.22s}
.nav-links.open .nav-link:nth-child(5){animation-delay:.28s}
.nav-links.open .nav-link:nth-child(6){animation-delay:.34s}
.nav-links.open .nav-link:nth-child(7){animation-delay:.40s}
@keyframes fadeIn{from{opacity:0}to{opacity:1}}
@keyframes fadeUp{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}

/* ============ 通用组件 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 26px;border-radius:999px;font-size:15px;font-weight:600;
  letter-spacing:.01em;transition:transform .2s ease,box-shadow .2s ease,background .2s ease,border-color .2s ease,color .2s ease;
}
.btn:active{transform:scale(.985)}
.btn-sm{height:48px;padding:0 20px;font-size:14px}
.btn-pri{background:var(--pri);color:#fff;box-shadow:var(--glow)}
.btn-pri:hover{background:#5C7CFF;box-shadow:0 0 0 1px rgba(76,111,255,.45),0 18px 46px -14px rgba(76,111,255,.7)}
.btn-pri:active{background:var(--pri-strong);box-shadow:none}
.btn-ghost{border:1px solid rgba(255,255,255,.18);color:var(--tx-0)}
.btn-ghost:hover{border-color:var(--pulse);background:rgba(52,229,208,.06);color:#fff}
.btn:focus-visible,a:focus-visible,button:focus-visible,input:focus-visible{
  outline:2px solid var(--pri);outline-offset:2px;
}
.tag{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:999px;
  background:rgba(76,111,255,.12);color:#8FA6FF;font-size:12px;letter-spacing:.06em;
}
.tag-hot{background:rgba(255,77,141,.14);color:#FF7FAE}
.card{
  background:var(--glass);border:1px solid rgba(255,255,255,.10);border-radius:var(--r-card);
  -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
  box-shadow:var(--shadow);position:relative;overflow:hidden;
  transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;
}
.card::before{
  content:"";position:absolute;left:0;right:0;top:0;height:1px;
  background:linear-gradient(90deg,transparent,var(--pulse),transparent);
  opacity:0;transition:opacity .25s ease-out;
}
.card:hover{transform:translateY(-2px);border-color:var(--line-2);box-shadow:var(--shadow-hover)}
.card:hover::before{opacity:1}
.card:active{transform:scale(.985)}
.section{padding:56px 0}
@media(min-width:768px){.section{padding:72px 0}}
@media(min-width:1024px){.section{padding:96px 0}}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:32px;flex-wrap:wrap}
.sec-head h2{font-size:clamp(1.6rem,2.6vw,2.25rem);font-weight:700}
.sec-sub{margin-top:12px;font-size:15px;color:var(--tx-2);max-width:62ch;line-height:1.8}
.link-more{
  display:inline-flex;align-items:center;gap:6px;color:var(--pri);font-size:14px;font-weight:600;
  transition:color .2s ease,gap .2s ease;
}
.link-more:hover{color:#8FA6FF;gap:10px}

/* ============ 页头带 ============ */
.page-band{
  position:relative;overflow:hidden;min-height:300px;display:flex;align-items:center;
  background-image:url("/assets/images/backpic/back-1.png");
  background-size:cover;background-position:center;border-bottom:1px solid var(--line);
}
.page-band::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(95deg,rgba(5,7,14,.90) 0%,rgba(5,7,14,.74) 55%,rgba(5,7,14,.82) 100%);
}
.page-band::after{
  content:"";position:absolute;inset:0;opacity:.22;
  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:64px 64px;
}
.band-inner{position:relative;z-index:2;padding:64px 0}
.crumb{display:flex;align-items:center;gap:8px;font-size:12px;color:var(--tx-2);letter-spacing:.04em}
.crumb a{transition:color .2s ease}
.crumb a:hover{color:var(--pri)}
.crumb .cur{color:var(--tx-0)}
.band-inner h1{
  margin:18px 0 0;font-size:clamp(2.1rem,4.6vw,3.5rem);font-weight:700;letter-spacing:-.02em;line-height:1.2;
  max-width:22ch;
}
.band-desc{margin-top:16px;font-size:17px;color:var(--tx-1);max-width:52ch;line-height:1.8}
.band-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}

/* ============ 图文交错 ============ */
.alt-list{display:flex;flex-direction:column;gap:64px}
.alt-row{display:grid;grid-template-columns:1fr;gap:24px;align-items:center}
@media(min-width:900px){
  .alt-row{grid-template-columns:1fr 1fr;gap:48px}
  .alt-row.rev .alt-media{order:2}
}
.alt-media{
  border-radius:var(--r-card);overflow:hidden;border:1px solid var(--line);
  background:var(--bg-2);position:relative;
}
.alt-media img{width:100%;aspect-ratio:3/2;object-fit:cover;transition:transform .5s ease}
.alt-row:hover .alt-media img{transform:scale(1.03)}
.alt-body h3{font-size:1.25rem;font-weight:600;margin:16px 0 12px;max-width:20ch}
.alt-body p{font-size:15.5px;color:var(--tx-1);line-height:1.9;margin-bottom:12px;max-width:44ch}
.alt-meta{display:flex;gap:18px;font-size:13px;color:var(--tx-2);margin:14px 0 16px}
.alt-meta b{color:var(--pulse);font-weight:600}

/* ============ 标注约定列表 ============ */
.spec-wrap{display:grid;grid-template-columns:1fr;gap:32px}
@media(min-width:1024px){.spec-wrap{grid-template-columns:1fr 1fr;gap:48px;align-items:start}}
.spec-list{list-style:none;margin:0;padding:0;border-top:1px solid var(--line)}
.spec-row{
  display:grid;grid-template-columns:1fr;gap:6px;
  padding:20px 16px;border-bottom:1px solid var(--line);
  transition:background .2s ease-out,padding-left .2s ease-out;
}
@media(min-width:640px){.spec-row{grid-template-columns:150px 1fr;gap:20px;align-items:baseline}}
.spec-row:hover{background:rgba(255,255,255,.03);padding-left:22px}
.spec-key{font-size:13px;color:var(--pulse);letter-spacing:.1em}
.spec-val{font-size:15px;color:var(--tx-1);line-height:1.85}
.spec-note{
  padding:28px;border-radius:var(--r-card);background:var(--glass);
  border:1px solid rgba(255,255,255,.10);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
}
.spec-note h3{font-size:1.15rem;font-weight:600;margin-bottom:14px}
.spec-note p{font-size:15px;color:var(--tx-1);line-height:1.9;margin-bottom:14px}
.spec-note p:last-child{margin-bottom:0}

/* ============ 取用流程 ============ */
.flow{display:grid;grid-template-columns:1fr;gap:20px;position:relative}
@media(min-width:640px){.flow{grid-template-columns:1fr 1fr}}
@media(min-width:1024px){.flow{grid-template-columns:repeat(4,1fr);gap:24px}}
.flow-step{
  padding:24px;border-radius:var(--r-card);background:var(--bg-1);
  border:1px solid var(--line);transition:border-color .2s ease-out,transform .2s ease-out;
}
.flow-step:hover{border-color:var(--line-2);transform:translateY(-2px)}
.flow-no{
  font-size:13px;color:var(--pulse);letter-spacing:.16em;font-variant-numeric:tabular-nums;
  display:block;margin-bottom:12px;
}
.flow-step h3{font-size:16px;font-weight:600;margin-bottom:10px}
.flow-step p{font-size:14.5px;color:var(--tx-2);line-height:1.85}

/* ============ FAQ ============ */
.faq{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:22px 4px;text-align:left;font-size:16px;font-weight:600;color:var(--tx-0);
  transition:color .2s ease;
}
.faq-q:hover{color:#fff}
.faq-icon{position:relative;width:16px;height:16px;flex:0 0 auto}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:var(--pulse);transition:transform .25s ease,opacity .2s ease;
}
.faq-icon::before{left:0;top:7.5px;width:16px;height:1px}
.faq-icon::after{left:7.5px;top:0;width:1px;height:16px}
.faq-item.open .faq-icon::after{transform:scaleY(0);opacity:0}
.faq-a{max-height:0;overflow:hidden;transition:max-height .32s ease}
.faq-item.open .faq-a{max-height:340px}
.faq-a p{padding:0 4px 24px;font-size:15px;line-height:1.8;color:var(--tx-1);max-width:70ch}

/* ============ 相关推荐 ============ */
.rec-list{display:grid;grid-template-columns:1fr;gap:0;border-top:1px solid var(--line)}
@media(min-width:768px){.rec-list{grid-template-columns:1fr 1fr;column-gap:48px}}
.rec-item{
  display:flex;gap:16px;align-items:baseline;padding:18px 4px;border-bottom:1px solid var(--line);
  transition:background .2s ease-out,padding-left .2s ease-out;
}
.rec-item:hover{background:rgba(255,255,255,.03);padding-left:14px}
.rec-no{font-size:13px;color:var(--pulse);font-variant-numeric:tabular-nums;letter-spacing:.08em;flex:0 0 auto}
.rec-title{font-size:15.5px;color:var(--tx-0);font-weight:600;display:block;margin-bottom:4px}
.rec-cat{font-size:12.5px;color:var(--tx-2);letter-spacing:.06em}

/* ============ CTA 条 ============ */
.cta-bar{
  display:flex;flex-direction:column;gap:20px;padding:28px;
  border-radius:var(--r-card);background:var(--glass);
  border:1px solid rgba(255,255,255,.10);
  -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
}
@media(min-width:768px){
  .cta-bar{flex-direction:row;align-items:center;justify-content:space-between;padding:32px 36px}
}
.cta-bar h2{font-size:1.25rem;font-weight:600;margin-bottom:8px}
.cta-bar p{font-size:14.5px;color:var(--tx-2)}
.cta-actions{display:flex;flex-direction:column;gap:12px;width:100%}
@media(min-width:768px){.cta-actions{flex-direction:row;width:auto;flex:0 0 auto}}
@media(max-width:767px){.cta-actions .btn{width:100%}}

/* ============ 页脚 ============ */
.site-footer{border-top:1px solid var(--line);background:var(--bg-1);margin-top:24px}
.foot-grid{
  display:grid;grid-template-columns:1fr;gap:36px;padding:56px 0 40px;
}
@media(min-width:640px){.foot-grid{grid-template-columns:1fr 1fr}}
@media(min-width:1024px){.foot-grid{grid-template-columns:1.4fr 1fr 1fr 1.3fr;gap:48px}}
.foot-desc{margin-top:16px;font-size:14px;color:var(--tx-2);line-height:1.85;max-width:28ch}
.foot-title{font-size:13px;color:var(--tx-0);letter-spacing:.1em;margin-bottom:16px;font-weight:600}
.foot-list{list-style:none;margin:0;padding:0}
.foot-list li{margin-bottom:12px}
.foot-list a{font-size:14px;color:var(--tx-1);transition:color .2s ease}
.foot-list a:hover{color:var(--tx-0)}
.sub-form{display:flex;flex-direction:column;gap:12px}
@media(min-width:520px){.sub-form{flex-direction:row}}
.sub-form input{
  flex:1;height:48px;padding:0 16px;border-radius:12px;background:var(--bg-1);
  border:1px solid var(--line);color:var(--tx-0);font-size:14px;transition:border-color .2s ease,box-shadow .2s ease;
}
.sub-form input::placeholder{color:var(--tx-2)}
.sub-form input:focus{outline:none;border-color:var(--pri);box-shadow:var(--glow-sm)}
.sub-note{margin-top:12px;font-size:13px;color:var(--tx-2);line-height:1.7}
.foot-bottom{
  display:flex;flex-direction:column;gap:8px;padding:20px 0 32px;
  border-top:1px solid var(--line);font-size:13px;color:var(--tx-2);
}
@media(min-width:768px){.foot-bottom{flex-direction:row;align-items:center;justify-content:space-between}}

@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{animation:none!important;transition:none!important}
  html{scroll-behavior:auto}
}

/* roulang page: category3 */
:root{
    --bg-0:#05070E;
    --bg-1:#0A0F1C;
    --bg-2:#0F1626;
    --glass:rgba(255,255,255,0.045);
    --pri:#4C6FFF;
    --pri-strong:#2F55E8;
    --pulse:#34E5D0;
    --hot:#FF4D8D;
    --tx-0:#EAF0FF;
    --tx-1:#A9B6D3;
    --tx-2:#6C7A99;
    --line:rgba(255,255,255,0.08);
    --line-2:rgba(255,255,255,0.16);
    --glow:0 0 0 1px rgba(76,111,255,.35), 0 14px 40px -14px rgba(76,111,255,.55);
    --glow-sm:0 0 18px -6px rgba(76,111,255,.6);
    --radius-card:16px;
    --radius-inner:12px;
    --shadow-card:0 8px 30px -18px rgba(0,0,0,.9);
  }

  *,*::before,*::after{box-sizing:border-box;}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
  body{
    margin:0;
    background:var(--bg-0);
    color:var(--tx-1);
    font-family:Inter,MiSans,"HarmonyOS Sans","PingFang SC","Noto Sans SC","Microsoft YaHei",sans-serif;
    font-size:16px;
    line-height:1.9;
    -webkit-font-smoothing:antialiased;
    overflow-x:hidden;
  }
  body::before{
    content:"";
    position:fixed;
    inset:0;
    pointer-events:none;
    background-image:linear-gradient(rgba(255,255,255,.028) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.028) 1px,transparent 1px);
    background-size:72px 72px;
    z-index:0;
  }
  img,svg{display:block;max-width:100%;}
  a{color:inherit;text-decoration:none;}
  button,input{font:inherit;color:inherit;}
  h1,h2,h3,h4,p,ul,ol{margin:0;}
  ul,ol{padding:0;list-style:none;}
  ::selection{background:rgba(76,111,255,.35);color:#fff;}

  .container-x{
    width:100%;
    max-width:1200px;
    margin:0 auto;
    padding-left:20px;
    padding-right:20px;
    position:relative;
    z-index:1;
  }
  @media(min-width:768px){.container-x{padding-left:32px;padding-right:32px;}}
  @media(min-width:1024px){.container-x{padding-left:40px;padding-right:40px;}}

  /* ---------- header ---------- */
  .site-header{
    position:sticky;
    top:0;
    z-index:60;
    background:rgba(5,7,14,.72);
    backdrop-filter:blur(14px);
    -webkit-backdrop-filter:blur(14px);
    border-bottom:1px solid var(--line);
  }
  .nav-wrap{
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:16px;
    height:64px;
  }
  @media(min-width:1024px){.nav-wrap{height:72px;}}
  .brand{
    display:inline-flex;
    align-items:center;
    gap:10px;
    color:var(--tx-0);
    font-weight:700;
    font-size:15px;
    letter-spacing:.01em;
    white-space:nowrap;
  }
  .brand-mark{
    width:11px;height:11px;border-radius:50%;
    background:var(--pri);
    box-shadow:var(--glow-sm);
    flex:0 0 auto;
    animation:pulseDot 3s ease-in-out infinite;
  }
  @keyframes pulseDot{
    0%,100%{box-shadow:0 0 14px -4px rgba(76,111,255,.6);}
    50%{box-shadow:0 0 20px 1px rgba(52,229,208,.55);}
  }
  .brand-name{font-size:15px;}
  .nav-links{display:none;}
  @media(min-width:1024px){
    .nav-links{display:flex;align-items:center;gap:26px;}
  }
  .nav-link{
    position:relative;
    padding:6px 0;
    font-size:14px;
    color:var(--tx-1);
    transition:color .2s ease-out;
  }
  .nav-link::after{
    content:"";
    position:absolute;
    left:0;right:0;bottom:0;
    height:1px;
    background:var(--pulse);
    transform:scaleX(0);
    transform-origin:left;
    transition:transform .22s ease-out;
  }
  .nav-link:hover{color:var(--tx-0);}
  .nav-link:hover::after{transform:scaleX(1);}
  .nav-link.active{color:var(--tx-0);}
  .nav-link.active::after{transform:scaleX(1);}
  .nav-link.active::before{
    content:"";
    position:absolute;
    left:50%;top:-7px;
    width:4px;height:4px;border-radius:50%;
    background:var(--pulse);
    transform:translateX(-50%);
  }
  .nav-cta{
    display:none;
    align-items:center;
    height:36px;
    padding:0 16px;
    border-radius:999px;
    border:1px solid var(--line-2);
    font-size:13px;
    color:var(--tx-0);
    transition:.2s ease-out;
  }
  .nav-cta:hover{border-color:var(--pulse);background:rgba(52,229,208,.06);}
  @media(min-width:640px){.nav-cta{display:inline-flex;}}
  .burger{
    width:40px;height:40px;
    display:inline-flex;
    flex-direction:column;
    align-items:center;
    justify-content:center;
    gap:5px;
    background:transparent;
    border:1px solid var(--line);
    border-radius:10px;
    cursor:pointer;
    transition:.2s ease-out;
  }
  .burger span{display:block;width:16px;height:1.5px;background:var(--tx-1);transition:.2s ease-out;}
  .burger:hover{border-color:var(--line-2);}
  .burger:hover span{background:var(--tx-0);}
  @media(min-width:1024px){.burger{display:none;}}

  .drawer{
    position:fixed;
    inset:0;
    z-index:80;
    background:rgba(5,7,14,.94);
    backdrop-filter:blur(18px);
    -webkit-backdrop-filter:blur(18px);
    padding:24px 20px;
    opacity:0;
    visibility:hidden;
    transition:opacity .24s ease-out,visibility .24s ease-out;
  }
  .drawer.open{opacity:1;visibility:visible;}
  .drawer-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:24px;}
  .drawer-close{
    width:40px;height:40px;
    border-radius:10px;
    border:1px solid var(--line);
    background:transparent;
    color:var(--tx-1);
    font-size:18px;
    line-height:1;
    cursor:pointer;
  }
  .drawer-close:hover{border-color:var(--line-2);color:var(--tx-0);}
  .drawer-nav a{
    display:flex;
    align-items:center;
    height:56px;
    border-bottom:1px solid var(--line);
    color:var(--tx-1);
    font-size:16px;
    opacity:0;
    transform:translateY(8px);
    transition:opacity .3s ease-out,transform .3s ease-out,color .2s;
  }
  .drawer.open .drawer-nav a{opacity:1;transform:translateY(0);}
  .drawer-nav a:hover,.drawer-nav a.active{color:var(--tx-0);}

  /* ---------- hero band ---------- */
  .hero-band{
    position:relative;
    min-height:280px;
    display:flex;
    align-items:flex-end;
    padding:56px 0 40px;
    background-image:url('/assets/images/backpic/back-2.png');
    background-size:cover;
    background-position:center;
    border-bottom:1px solid var(--line);
    overflow:hidden;
  }
  .hero-band::before{
    content:"";
    position:absolute;
    inset:0;
    background:linear-gradient(180deg,rgba(5,7,14,.82) 0%,rgba(5,7,14,.74) 45%,rgba(5,7,14,.94) 100%);
  }
  .hero-band::after{
    content:"";
    position:absolute;
    left:0;right:0;bottom:0;
    height:1px;
    background:linear-gradient(90deg,transparent,rgba(52,229,208,.55),transparent);
    opacity:.5;
  }
  @media(min-width:1024px){.hero-band{min-height:320px;padding:72px 0 52px;}}
  .crumb{
    display:flex;
    flex-wrap:wrap;
    align-items:center;
    gap:8px;
    font-size:12px;
    color:var(--tx-2);
    margin-bottom:18px;
  }
  .crumb a{transition:color .2s;}
  .crumb a:hover{color:var(--pri);}
  .crumb span.sep{color:rgba(255,255,255,.2);}
  .crumb .now{color:var(--tx-0);}
  .hero-h1{
    font-size:clamp(2.1rem,4.6vw,3.5rem);
    line-height:1.16;
    font-weight:700;
    letter-spacing:-.02em;
    color:var(--tx-0);
    max-width:820px;
  }
  .hero-sub{
    margin-top:16px;
    max-width:640px;
    font-size:17px;
    line-height:1.85;
    color:var(--tx-1);
  }
  @media(min-width:768px){.hero-sub{font-size:18px;}}
  .wave{
    display:none;
    position:absolute;
    right:0;
    bottom:22px;
    width:320px;
    height:44px;
    opacity:.32;
  }
  @media(min-width:1024px){.wave{display:block;}}
  .wave path{
    fill:none;
    stroke:var(--pulse);
    stroke-width:1.2;
    stroke-linecap:round;
    animation:waveShift 6s ease-in-out infinite;
  }
  @keyframes waveShift{
    0%,100%{stroke-dashoffset:0;opacity:.75;}
    50%{stroke-dashoffset:22;opacity:1;}
  }

  /* ---------- sections ---------- */
  .section{padding:56px 0;position:relative;}
  @media(min-width:768px){.section{padding:72px 0;}}
  @media(min-width:1024px){.section{padding:96px 0;}}
  .sec-head{
    display:flex;
    flex-wrap:wrap;
    align-items:flex-end;
    justify-content:space-between;
    gap:16px;
    margin-bottom:32px;
  }
  .eyebrow{
    display:inline-block;
    font-size:12px;
    letter-spacing:.12em;
    color:var(--pulse);
    text-transform:uppercase;
    margin-bottom:10px;
  }
  h2.sec-title{
    font-size:clamp(1.6rem,2.6vw,2.25rem);
    line-height:1.25;
    font-weight:700;
    color:var(--tx-0);
    letter-spacing:-.01em;
  }
  .sec-desc{
    margin-top:16px;
    max-width:660px;
    font-size:16px;
    line-height:1.9;
    color:var(--tx-1);
  }
  .text-link{
    display:inline-flex;
    align-items:center;
    gap:6px;
    font-size:14px;
    color:var(--pri);
    border-bottom:1px solid rgba(76,111,255,.35);
    padding-bottom:2px;
    transition:.2s ease-out;
  }
  .text-link:hover{color:var(--pulse);border-bottom-color:var(--pulse);}

  /* ---------- stats ---------- */
  .stat-grid{
    display:grid;
    grid-template-columns:repeat(2,minmax(0,1fr));
    gap:16px;
    margin-top:28px;
  }
  @media(min-width:1024px){.stat-grid{grid-template-columns:repeat(4,minmax(0,1fr));gap:24px;}}
  .stat{
    background:var(--glass);
    border:1px solid var(--line);
    border-radius:var(--radius-inner);
    padding:20px;
    backdrop-filter:blur(14px);
    -webkit-backdrop-filter:blur(14px);
    transition:.2s ease-out;
  }
  .stat:hover{border-color:var(--line-2);transform:translateY(-2px);}
  .stat-num{
    display:block;
    font-size:28px;
    font-weight:700;
    color:var(--tx-0);
    font-variant-numeric:tabular-nums;
    letter-spacing:-.02em;
  }
  .stat-label{display:block;margin-top:6px;font-size:14px;font-weight:600;color:var(--pulse);}
  .stat-desc{display:block;margin-top:4px;font-size:13px;color:var(--tx-2);line-height:1.7;}

  /* ---------- timeline ---------- */
  .tl{position:relative;padding-left:30px;margin-top:8px;}
  .tl::before{
    content:"";
    position:absolute;
    left:6px;top:10px;bottom:14px;
    width:1px;
    background:linear-gradient(180deg,rgba(52,229,208,.55),rgba(255,77,141,.35) 55%,rgba(255,255,255,.06));
  }
  @media(min-width:768px){.tl{padding-left:44px;}.tl::before{left:8px;}}
  .tl-item{position:relative;margin-bottom:20px;}
  .tl-item:last-child{margin-bottom:0;}
  .tl-item::before{
    content:"";
    position:absolute;
    left:-30px;
    top:26px;
    width:13px;height:13px;
    border-radius:50%;
    background:var(--bg-0);
    border:2px solid var(--pulse);
    box-shadow:0 0 16px -4px rgba(52,229,208,.75);
  }
  .tl-item:nth-child(even)::before{border-color:var(--hot);box-shadow:0 0 16px -4px rgba(255,77,141,.7);}
  @media(min-width:768px){.tl-item::before{left:-44px;}}
  .tl-card{
    position:relative;
    overflow:hidden;
    background:var(--glass);
    border:1px solid var(--line);
    border-radius:var(--radius-card);
    padding:24px;
    backdrop-filter:blur(14px);
    -webkit-backdrop-filter:blur(14px);
    box-shadow:var(--shadow-card);
    transition:border-color .2s ease-out,transform .2s ease-out,box-shadow .2s ease-out;
  }
  .tl-card::after{
    content:"";
    position:absolute;
    left:24px;right:24px;top:0;
    height:1px;
    background:linear-gradient(90deg,transparent,var(--pulse),transparent);
    opacity:0;
    transition:opacity .25s ease-out;
  }
  .tl-card:hover{border-color:var(--line-2);transform:translateY(-2px);box-shadow:0 16px 40px -22px rgba(0,0,0,.95);}
  .tl-card:hover::after{opacity:1;}
  .tl-top{display:flex;flex-wrap:wrap;align-items:center;gap:12px;}
  .tl-num{
    font-size:13px;
    font-weight:700;
    color:var(--pulse);
    font-variant-numeric:tabular-nums;
    letter-spacing:.08em;
  }
  .tl-title{font-size:1.25rem;font-weight:600;color:var(--tx-0);}
  .tl-desc{margin-top:12px;font-size:15px;line-height:1.9;color:var(--tx-1);}
  .tl-points{
    margin-top:16px;
    display:grid;
    gap:10px;
  }
  @media(min-width:768px){.tl-points{grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;}}
  .tl-point{
    border-left:2px solid rgba(52,229,208,.45);
    padding-left:12px;
  }
  .tl-point strong{display:block;font-size:13px;font-weight:600;color:var(--tx-0);}
  .tl-point span{display:block;margin-top:2px;font-size:13px;color:var(--tx-2);line-height:1.7;}

  /* ---------- checklist ---------- */
  .check-grid{
    display:grid;
    gap:16px;
    margin-top:8px;
  }
  @media(min-width:768px){.check-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:20px 32px;}}
  .check-item{
    display:flex;
    gap:12px;
    padding:16px 18px;
    border:1px solid var(--line);
    border-radius:var(--radius-inner);
    background:rgba(255,255,255,.02);
    transition:.2s ease-out;
  }
  .check-item:hover{border-color:var(--line-2);background:rgba(255,255,255,.04);}
  .check-item::before{
    content:"";
    flex:0 0 auto;
    width:8px;height:8px;
    margin-top:9px;
    background:var(--pulse);
    border-radius:2px;
  }
  .check-item strong{display:block;font-size:15px;font-weight:600;color:var(--tx-0);}
  .check-item span{display:block;margin-top:4px;font-size:14px;color:var(--tx-2);line-height:1.8;}

  /* ---------- pitfalls ---------- */
  .split{
    display:grid;
    gap:28px;
    align-items:start;
  }
  @media(min-width:1024px){.split{grid-template-columns:1fr 1fr;gap:40px;}}
  .media-card{
    position:relative;
    border-radius:var(--radius-card);
    overflow:hidden;
    border:1px solid var(--line);
    background:var(--bg-2);
  }
  .media-card img{
    width:100%;
    aspect-ratio:3/2;
    object-fit:cover;
  }
  .media-card figcaption{
    padding:14px 16px;
    font-size:13px;
    color:var(--tx-2);
    border-top:1px solid var(--line);
  }
  .pillar{
    display:grid;
    gap:14px;
  }
  .pillar-row{
    display:flex;
    gap:14px;
    padding:18px;
    border:1px solid var(--line);
    border-radius:var(--radius-inner);
    background:var(--glass);
    transition:.2s ease-out;
  }
  .pillar-row:hover{border-color:var(--line-2);transform:translateY(-2px);}
  .pillar-idx{
    flex:0 0 auto;
    font-size:13px;
    font-weight:700;
    color:var(--hot);
    font-variant-numeric:tabular-nums;
    padding-top:2px;
  }
  .pillar-row strong{display:block;font-size:15px;font-weight:600;color:var(--tx-0);}
  .pillar-row span{display:block;margin-top:4px;font-size:14px;line-height:1.8;color:var(--tx-2);}

  /* ---------- faq ---------- */
  .faq-list{display:grid;gap:12px;}
  .faq-item{
    border:1px solid var(--line);
    border-radius:var(--radius-card);
    background:var(--glass);
    overflow:hidden;
    backdrop-filter:blur(14px);
    -webkit-backdrop-filter:blur(14px);
    transition:border-color .2s ease-out;
  }
  .faq-item.open{border-color:var(--line-2);}
  .faq-q{
    width:100%;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:16px;
    padding:20px 22px;
    background:transparent;
    border:0;
    text-align:left;
    font-size:16px;
    font-weight:600;
    color:var(--tx-0);
    cursor:pointer;
  }
  .faq-icon{position:relative;flex:0 0 16px;width:16px;height:16px;}
  .faq-icon::before,.faq-icon::after{
    content:"";
    position:absolute;
    background:var(--pulse);
    transition:transform .22s ease-out,opacity .22s ease-out;
  }
  .faq-icon::before{left:0;top:7.5px;width:16px;height:1px;}
  .faq-icon::after{left:7.5px;top:0;width:1px;height:16px;}
  .faq-item.open .faq-icon::after{transform:scaleY(0);opacity:0;}
  .faq-a{
    max-height:0;
    overflow:hidden;
    transition:max-height .28s ease-out;
    background:var(--bg-1);
  }
  .faq-item.open .faq-a{max-height:340px;}
  .faq-a p{
    padding:0 22px 20px;
    font-size:15px;
    line-height:1.85;
    color:var(--tx-1);
  }

  /* ---------- related ---------- */
  .rel-list{display:grid;gap:0;border-top:1px solid var(--line);}
  .rel-row{
    display:flex;
    align-items:center;
    gap:16px;
    padding:18px 12px;
    border-bottom:1px solid var(--line);
    transition:background .2s ease-out;
  }
  .rel-row:hover{background:rgba(255,255,255,.03);}
  .rel-row .idx{
    font-size:13px;
    font-weight:700;
    color:var(--pulse);
    font-variant-numeric:tabular-nums;
    flex:0 0 28px;
  }
  .rel-row .rt{flex:1 1 auto;font-size:16px;font-weight:600;color:var(--tx-0);}
  .rel-row .rc{
    font-size:12px;
    color:var(--pri);
    background:rgba(76,111,255,.12);
    border-radius:999px;
    padding:4px 12px;
    white-space:nowrap;
  }

  /* ---------- cta ---------- */
  .cta-bar{
    display:flex;
    flex-direction:column;
    gap:18px;
    padding:24px;
    border-radius:var(--radius-card);
    border:1px solid var(--line);
    background:linear-gradient(120deg,rgba(76,111,255,.12),rgba(52,229,208,.06) 60%,rgba(255,255,255,.03));
    backdrop-filter:blur(14px);
    -webkit-backdrop-filter:blur(14px);
  }
  @media(min-width:768px){
    .cta-bar{flex-direction:row;align-items:center;justify-content:space-between;padding:28px 32px;}
  }
  .cta-text{font-size:17px;font-weight:600;color:var(--tx-0);line-height:1.7;}
  .cta-actions{display:flex;flex-direction:column;gap:12px;}
  @media(min-width:520px){.cta-actions{flex-direction:row;}}
  @media(min-width:768px){.cta-actions{flex:0 0 auto;}}

  /* ---------- buttons ---------- */
  .btn{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    gap:8px;
    height:48px;
    padding:0 24px;
    border-radius:999px;
    font-size:15px;
    font-weight:600;
    border:1px solid transparent;
    cursor:pointer;
    transition:background .2s ease-out,color .2s ease-out,border-color .2s ease-out,box-shadow .2s ease-out,transform .12s ease-out;
    white-space:nowrap;
  }
  .btn-sm{height:44px;padding:0 20px;font-size:14px;}
  .btn-pri{
    background:var(--pri);
    color:#fff;
    box-shadow:var(--glow);
  }
  .btn-pri:hover{background:#5A7BFF;box-shadow:0 0 0 1px rgba(76,111,255,.5),0 18px 46px -14px rgba(76,111,255,.7);}
  .btn-pri:active{background:var(--pri-strong);box-shadow:none;transform:scale(.985);}
  .btn-ghost{
    background:transparent;
    color:var(--tx-0);
    border-color:rgba(255,255,255,.18);
  }
  .btn-ghost:hover{border-color:var(--pulse);color:#fff;background:rgba(52,229,208,.06);}
  .btn-ghost:active{transform:scale(.985);}
  .btn:focus-visible,a:focus-visible,button:focus-visible,input:focus-visible{
    outline:2px solid var(--pri);
    outline-offset:2px;
  }
  .btn-full{width:100%;}
  @media(min-width:520px){.btn-full{width:auto;}}

  /* ---------- footer ---------- */
  .site-footer{
    border-top:1px solid var(--line);
    background:var(--bg-1);
    padding:56px 0 24px;
    position:relative;
    z-index:1;
  }
  .foot-grid{
    display:grid;
    gap:32px;
    padding-bottom:36px;
    border-bottom:1px solid var(--line);
  }
  @media(min-width:768px){.foot-grid{grid-template-columns:repeat(2,minmax(0,1fr));}}
  @media(min-width:1024px){.foot-grid{grid-template-columns:1.4fr 1fr 1fr 1.3fr;gap:40px;}}
  .foot-desc{margin-top:14px;font-size:14px;color:var(--tx-2);line-height:1.8;max-width:260px;}
  .foot-title{font-size:14px;font-weight:600;color:var(--tx-0);margin-bottom:14px;}
  .foot-list{display:grid;gap:10px;}
  .foot-list a{font-size:14px;color:var(--tx-1);transition:color .2s ease-out;}
  .foot-list a:hover{color:var(--tx-0);}
  .sub-form{display:flex;flex-direction:column;gap:12px;}
  @media(min-width:520px){.sub-form{flex-direction:row;}}
  .sub-form input{
    flex:1 1 auto;
    height:48px;
    padding:14px 16px;
    border-radius:12px;
    border:1px solid var(--line);
    background:var(--bg-0);
    color:var(--tx-0);
    font-size:14px;
    transition:border-color .2s ease-out,box-shadow .2s ease-out;
  }
  .sub-form input::placeholder{color:var(--tx-2);}
  .sub-form input:focus{outline:none;border-color:var(--pri);box-shadow:var(--glow-sm);}
  .sub-note{margin-top:10px;font-size:12px;color:var(--tx-2);}
  .foot-bottom{
    display:flex;
    flex-wrap:wrap;
    gap:8px 24px;
    justify-content:space-between;
    padding-top:20px;
    font-size:13px;
    color:var(--tx-2);
  }

  @media(prefers-reduced-motion:reduce){
    *{animation:none !important;transition-duration:.01ms !important;}
    html{scroll-behavior:auto;}
  }

/* roulang page: category4 */
:root{
    --bg-0:#05070E;
    --bg-1:#0A0F1C;
    --bg-2:#0F1626;
    --glass:rgba(255,255,255,.045);
    --pri:#4C6FFF;
    --pri-strong:#2F55E8;
    --pulse:#34E5D0;
    --hot:#FF4D8D;
    --tx-0:#EAF0FF;
    --tx-1:#A9B6D3;
    --tx-2:#6C7A99;
    --line:rgba(255,255,255,.08);
    --line-2:rgba(255,255,255,.16);
    --glow:0 0 0 1px rgba(76,111,255,.35), 0 14px 40px -14px rgba(76,111,255,.55);
    --glow-sm:0 0 18px -6px rgba(76,111,255,.6);
    --r-card:16px;
    --r-sm:12px;
    --r-img:14px;
  }
  *,*::before,*::after{box-sizing:border-box}
  html{scroll-behavior:smooth}
  body{
    margin:0;
    background:var(--bg-0);
    color:var(--tx-1);
    font-family:"Inter","HarmonyOS Sans","MiSans","PingFang SC","Noto Sans SC","Microsoft YaHei",system-ui,sans-serif;
    font-size:16px;
    line-height:1.9;
    -webkit-font-smoothing:antialiased;
    text-rendering:optimizeLegibility;
  }
  img{display:block;max-width:100%;height:auto}
  a{color:inherit;text-decoration:none}
  button,input{font:inherit}
  h1,h2,h3,h4,p,ul,ol,figure{margin:0}
  ul{padding:0;list-style:none}
  .num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum"}

  .container-x{width:100%;max-width:1200px;margin:0 auto;padding:0 40px}

  /* ---------- 导航 ---------- */
  .site-header{
    position:sticky;top:0;z-index:60;
    background:rgba(5,7,14,.72);
    -webkit-backdrop-filter:blur(14px);
    backdrop-filter:blur(14px);
    border-bottom:1px solid var(--line);
  }
  .nav-wrap{display:flex;align-items:center;justify-content:space-between;gap:24px;height:72px}
  .brand{display:inline-flex;align-items:center;gap:10px}
  .brand-mark{width:10px;height:10px;border-radius:999px;background:var(--pulse);box-shadow:0 0 12px rgba(52,229,208,.85);flex:none}
  .brand-name{color:var(--tx-0);font-weight:700;font-size:16px;letter-spacing:.01em;white-space:nowrap}
  .nav-links{display:flex;align-items:center;gap:28px}
  .nav-link{
    position:relative;color:var(--tx-1);font-size:15px;line-height:1;padding:8px 0;
    transition:color .2s ease-out;
  }
  .nav-link:hover{color:var(--tx-0)}
  .nav-link::after{
    content:"";position:absolute;left:0;right:0;bottom:0;height:1px;
    background:var(--pulse);transform:scaleX(0);transform-origin:left;
    transition:transform .25s ease-out;
  }
  .nav-link:hover::after{transform:scaleX(1)}
  .nav-link.active{color:var(--tx-0)}
  .nav-link.active::after{transform:scaleX(1)}
  .nav-link.active::before{
    content:"";position:absolute;left:-11px;top:50%;margin-top:-2px;
    width:4px;height:4px;border-radius:999px;background:var(--pulse);
  }
  .nav-cta{
    display:inline-flex;align-items:center;height:36px;padding:0 18px;
    border:1px solid var(--line-2);border-radius:999px;
    color:var(--tx-0);font-size:14px;line-height:1;
    transition:border-color .2s ease-out,background .2s ease-out,color .2s ease-out;
  }
  .nav-cta:hover{border-color:var(--pulse);color:#fff;background:rgba(52,229,208,.06)}
  .burger{
    display:none;flex-direction:column;justify-content:center;gap:5px;
    width:40px;height:40px;border:1px solid var(--line);border-radius:10px;
    background:transparent;cursor:pointer;
  }
  .burger span{display:block;width:18px;height:1px;margin:0 auto;background:var(--tx-0)}
  .burger:focus-visible,.nav-link:focus-visible,.nav-cta:focus-visible,.btn:focus-visible{
    outline:2px solid var(--pri);outline-offset:2px;border-radius:6px;
  }

  /* 移动抽屉 */
  .mobile-drawer{
    position:fixed;inset:0;z-index:90;display:none;flex-direction:column;
    background:rgba(5,7,14,.96);
    -webkit-backdrop-filter:blur(18px);
    backdrop-filter:blur(18px);
    padding:20px 24px 40px;
  }
  .mobile-drawer.open{display:flex}
  .drawer-head{display:flex;align-items:center;justify-content:space-between;height:56px;border-bottom:1px solid var(--line)}
  .drawer-close{
    width:40px;height:40px;border-radius:10px;border:1px solid var(--line);
    background:transparent;color:var(--tx-0);font-size:20px;line-height:1;cursor:pointer;
  }
  .drawer-links{display:flex;flex-direction:column;margin-top:16px}
  .drawer-links a{
    height:56px;display:flex;align-items:center;color:var(--tx-1);font-size:16px;
    border-bottom:1px solid var(--line);opacity:0;transform:translateY(6px);
    animation:drawerIn .32s ease-out forwards;
  }
  .drawer-links a:nth-child(1){animation-delay:.04s}
  .drawer-links a:nth-child(2){animation-delay:.10s}
  .drawer-links a:nth-child(3){animation-delay:.16s}
  .drawer-links a:nth-child(4){animation-delay:.22s}
  .drawer-links a:nth-child(5){animation-delay:.28s}
  .drawer-links a:nth-child(6){animation-delay:.34s}
  .drawer-links a.is-active{color:var(--tx-0)}
  @keyframes drawerIn{to{opacity:1;transform:translateY(0)}}

  /* ---------- 页头带 ---------- */
  .page-band{
    position:relative;overflow:hidden;min-height:300px;
    display:flex;align-items:flex-end;
    border-bottom:1px solid var(--line);
  }
  .page-band-bg{
    position:absolute;inset:0;
    background-image:url("/assets/images/backpic/back-2.png");
    background-size:cover;background-position:center;opacity:.5;
  }
  .page-band-mask{
    position:absolute;inset:0;
    background:
      linear-gradient(180deg,rgba(5,7,14,.86) 0%,rgba(5,7,14,.90) 55%,rgba(5,7,14,.96) 100%),
      repeating-linear-gradient(90deg,rgba(255,255,255,.035) 0 1px,transparent 1px 72px);
  }
  .page-band-inner{position:relative;z-index:2;width:100%;padding:96px 0 44px}
  .crumb{display:flex;align-items:center;gap:8px;font-size:12px;color:var(--tx-2);letter-spacing:.02em}
  .crumb a{color:var(--tx-2);transition:color .2s ease-out}
  .crumb a:hover{color:var(--pri)}
  .crumb .crumb-now{color:var(--tx-0)}
  .crumb .sep{color:rgba(255,255,255,.22)}
  .page-band h1{
    margin-top:18px;
    color:var(--tx-0);
    font-size:clamp(1.9rem,3.6vw,2.85rem);
    font-weight:700;letter-spacing:-.02em;line-height:1.25;
    max-width:820px;
  }
  .page-band h1 .kw-pulse{color:var(--pulse)}
  .band-sub{margin-top:16px;max-width:660px;font-size:17px;line-height:1.8;color:var(--tx-1)}
  .wave-line{
    position:absolute;left:0;right:0;bottom:0;height:26px;z-index:2;opacity:.32;
    background:
      repeating-linear-gradient(90deg,
        transparent 0 6px,
        rgba(52,229,208,.55) 6px 7px,
        transparent 7px 14px,
        rgba(76,111,255,.45) 14px 15px,
        transparent 15px 24px);
    -webkit-mask-image:linear-gradient(90deg,transparent,#000 12%,#000 78%,transparent);
    mask-image:linear-gradient(90deg,transparent,#000 12%,#000 78%,transparent);
  }

  /* ---------- 通用板块 ---------- */
  .section{padding:96px 0}
  .section-tight{padding:72px 0}
  .sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:36px}
  .sec-head h2{color:var(--tx-0);font-size:clamp(1.5rem,2.5vw,2rem);font-weight:700;letter-spacing:-.01em;line-height:1.35}
  .sec-head p{margin-top:12px;font-size:15px;color:var(--tx-2);max-width:640px}
  .sec-more{color:var(--tx-1);font-size:14px;white-space:nowrap;border-bottom:1px solid transparent;transition:color .2s,border-color .2s}
  .sec-more:hover{color:var(--tx-0);border-color:var(--pulse)}

  /* ---------- 指标数据带 ---------- */
  .metric-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
  .metric{
    background:var(--glass);border:1px solid rgba(255,255,255,.10);border-radius:var(--r-card);
    -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
    padding:24px;position:relative;overflow:hidden;
    transition:transform .2s ease-out,border-color .2s ease-out,box-shadow .2s ease-out;
  }
  .metric::before{
    content:"";position:absolute;left:0;right:0;top:0;height:1px;
    background:linear-gradient(90deg,transparent,var(--pulse),transparent);
    opacity:0;transition:opacity .2s ease-out;
  }
  .metric:hover{transform:translateY(-2px);border-color:var(--line-2);box-shadow:0 14px 40px -22px rgba(0,0,0,.95)}
  .metric:hover::before{opacity:1}
  .metric .m-val{color:var(--tx-0);font-size:30px;font-weight:700;line-height:1.2;letter-spacing:-.02em}
  .metric .m-val small{font-size:14px;font-weight:500;color:var(--tx-2);margin-left:6px;letter-spacing:0}
  .metric .m-label{margin-top:8px;font-size:13px;color:var(--tx-2);letter-spacing:.02em}

  /* ---------- 封面卡阵列 ---------- */
  .param-grid{display:grid;grid-template-columns:1.9fr 1fr;gap:32px;align-items:start}
  .cover-stack{display:grid;grid-template-columns:1fr 1fr;gap:24px}
  .cover-card{
    position:relative;display:block;border-radius:var(--r-card);overflow:hidden;
    border:1px solid var(--line);background:var(--bg-2);
    transition:transform .2s ease-out,border-color .2s ease-out,box-shadow .2s ease-out;
  }
  .cover-card:hover{transform:translateY(-2px);border-color:var(--line-2);box-shadow:0 18px 46px -24px rgba(0,0,0,.95)}
  .cover-card img{width:100%;aspect-ratio:3/2;object-fit:cover;border-radius:0;transition:transform .35s ease-out}
  .cover-card:hover img{transform:scale(1.03)}
  .cover-card .cover-veil{
    position:absolute;inset:0;
    background:linear-gradient(180deg,rgba(5,7,14,.05) 30%,rgba(5,7,14,.78) 72%,rgba(5,7,14,.96) 100%);
    transition:background .25s ease-out;
  }
  .cover-card:hover .cover-veil{
    background:linear-gradient(180deg,rgba(5,7,14,.22) 20%,rgba(5,7,14,.88) 66%,rgba(5,7,14,.98) 100%);
  }
  .cover-body{
    position:absolute;left:0;right:0;bottom:0;padding:22px;
    transition:transform .25s ease-out;
  }
  .cover-card:hover .cover-body{transform:translateY(-4px)}
  .cover-tag{
    display:inline-block;font-size:12px;letter-spacing:.12em;color:var(--pulse);
    border:1px solid rgba(52,229,208,.3);border-radius:999px;padding:2px 10px;margin-bottom:10px;
  }
  .cover-body h3{color:var(--tx-0);font-size:19px;font-weight:600;line-height:1.5;letter-spacing:-.01em}
  .cover-body p{margin-top:8px;font-size:14px;line-height:1.7;color:var(--tx-1);
    display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}

  .side-card{
    position:sticky;top:96px;
    background:var(--glass);border:1px solid rgba(255,255,255,.10);border-radius:var(--r-card);
    -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
    padding:26px;
  }
  .side-card h3{color:var(--tx-0);font-size:17px;font-weight:600;line-height:1.5}
  .side-card .side-note{margin-top:10px;font-size:14px;color:var(--tx-2);line-height:1.8}
  .side-list{margin-top:20px;display:flex;flex-direction:column;gap:14px}
  .side-list li{display:flex;gap:12px;font-size:14px;line-height:1.75;color:var(--tx-1)}
  .side-list .idx{
    flex:none;width:22px;height:22px;border-radius:999px;
    display:flex;align-items:center;justify-content:center;
    font-size:12px;color:var(--pulse);border:1px solid rgba(52,229,208,.32);
  }
  .side-card .btn{margin-top:22px;width:100%;justify-content:center}

  /* ---------- 参数明细 ---------- */
  .spec-group{margin-top:40px}
  .spec-group:first-of-type{margin-top:0}
  .spec-group-head{display:flex;align-items:center;gap:12px;padding-bottom:14px;border-bottom:1px solid var(--line-2)}
  .spec-group-head span.dot{width:6px;height:6px;border-radius:999px;background:var(--pulse);flex:none}
  .spec-group-head h3{color:var(--tx-0);font-size:18px;font-weight:600}
  .spec-group-head em{margin-left:auto;font-style:normal;font-size:13px;color:var(--tx-2)}
  .spec-row{
    display:grid;grid-template-columns:200px 1fr;gap:24px;
    padding:20px 0;border-bottom:1px solid var(--line);
    transition:background .2s ease-out;
  }
  .spec-row:hover{background:rgba(255,255,255,.02)}
  .spec-row dt{color:var(--tx-0);font-size:15px;font-weight:600;line-height:1.7}
  .spec-row dd{margin:0;font-size:15px;color:var(--tx-1);line-height:1.85}

  /* ---------- 相关推荐 ---------- */
  .rec-list{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
  .rec-item{
    display:block;padding:22px;border-radius:var(--r-sm);
    background:var(--glass);border:1px solid var(--line);
    transition:border-color .2s ease-out,transform .2s ease-out,background .2s ease-out;
  }
  .rec-item:hover{border-color:var(--line-2);transform:translateY(-2px);background:rgba(255,255,255,.06)}
  .rec-item .rec-idx{font-size:12px;letter-spacing:.12em;color:var(--pulse)}
  .rec-item h3{margin-top:10px;color:var(--tx-0);font-size:16px;font-weight:600;line-height:1.55}
  .rec-item .rec-cat{margin-top:10px;font-size:13px;color:var(--tx-2)}

  /* ---------- CTA 条 ---------- */
  .cta-bar{
    display:flex;align-items:center;justify-content:space-between;gap:24px;
    padding:26px 28px;border-radius:var(--r-card);
    background:var(--glass);border:1px solid rgba(255,255,255,.10);
    -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
  }
  .cta-bar p{font-size:16px;color:var(--tx-0);line-height:1.7}
  .cta-actions{display:flex;gap:12px;flex:none}

  /* ---------- 按钮 ---------- */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    height:48px;padding:0 24px;border-radius:999px;border:1px solid transparent;
    font-size:15px;line-height:1;cursor:pointer;
    transition:background .2s ease-out,border-color .2s ease-out,color .2s ease-out,box-shadow .2s ease-out,transform .15s ease-out;
  }
  .btn:active{transform:scale(.985)}
  .btn-pri{background:var(--pri);color:#fff;box-shadow:var(--glow)}
  .btn-pri:hover{background:#5b7bff;box-shadow:0 0 0 1px rgba(76,111,255,.45),0 18px 46px -14px rgba(76,111,255,.7)}
  .btn-pri:active{background:var(--pri-strong);box-shadow:none}
  .btn-ghost{background:transparent;border-color:rgba(255,255,255,.18);color:var(--tx-0)}
  .btn-ghost:hover{border-color:var(--pulse);color:#fff;background:rgba(52,229,208,.06)}
  .btn-sm{height:40px;padding:0 18px;font-size:14px}

  /* ---------- 页脚 ---------- */
  .site-footer{margin-top:24px;border-top:1px solid var(--line);background:var(--bg-1)}
  .foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.3fr;gap:32px;padding:64px 0 40px}
  .foot-desc{margin-top:16px;font-size:14px;color:var(--tx-2);line-height:1.8;max-width:280px}
  .foot-title{color:var(--tx-0);font-size:14px;font-weight:600;letter-spacing:.02em;margin-bottom:16px}
  .foot-list li+li{margin-top:10px}
  .foot-list a{font-size:14px;color:var(--tx-1);transition:color .2s ease-out}
  .foot-list a:hover{color:var(--tx-0)}
  .sub-form{display:flex;gap:10px}
  .sub-form input{
    flex:1;min-width:0;height:48px;padding:14px 16px;
    background:var(--bg-1);border:1px solid var(--line);border-radius:12px;
    color:var(--tx-0);font-size:14px;
    transition:border-color .2s ease-out,box-shadow .2s ease-out;
  }
  .sub-form input::placeholder{color:var(--tx-2)}
  .sub-form input:focus{outline:none;border-color:var(--pri);box-shadow:var(--glow-sm)}
  .sub-note{margin-top:12px;font-size:13px;color:var(--tx-2);line-height:1.7}
  .sub-tip{margin-top:10px;font-size:13px;color:var(--pulse);min-height:18px}
  .foot-bottom{
    display:flex;align-items:center;justify-content:space-between;gap:16px;
    padding:22px 0 32px;border-top:1px solid var(--line);
    font-size:13px;color:var(--tx-2);
  }

  /* ---------- 响应式 ---------- */
  @media (max-width:1023px){
    .nav-links{display:none}
    .nav-cta{display:none}
    .burger{display:flex}
    .nav-wrap{height:64px}
    .container-x{padding:0 32px}
    .section{padding:72px 0}
    .section-tight{padding:56px 0}
    .param-grid{grid-template-columns:1fr}
    .side-card{position:static}
    .metric-grid{grid-template-columns:repeat(2,1fr)}
    .page-band-inner{padding:72px 0 36px}
  }
  @media (max-width:767px){
    .cover-stack{grid-template-columns:1fr}
    .rec-list{grid-template-columns:1fr}
    .foot-grid{grid-template-columns:1fr 1fr}
    .sec-head{flex-direction:column;align-items:flex-start;gap:12px}
    .spec-row{grid-template-columns:1fr;gap:6px}
    .cta-bar{flex-direction:column;align-items:flex-start}
    .cta-actions{width:100%;flex-direction:column}
    .cta-actions .btn{width:100%}
    .sub-form{flex-direction:column}
    .sub-form .btn{width:100%}
    .foot-bottom{flex-direction:column;align-items:flex-start}
  }
  @media (max-width:520px){
    .container-x{padding:0 20px}
    .section{padding:56px 0}
    .section-tight{padding:48px 0}
    .metric-grid{grid-template-columns:1fr}
    .foot-grid{grid-template-columns:1fr}
    .wave-line{display:none}
    .page-band{min-height:260px}
  }

  @media (prefers-reduced-motion:reduce){
    *{animation:none !important;transition:none !important}
    html{scroll-behavior:auto}
  }

/* roulang page: category5 */
:root{
  --bg-0:#05070E;
  --bg-1:#0A0F1C;
  --bg-2:#0F1626;
  --glass:rgba(255,255,255,.045);
  --pri:#4C6FFF;
  --pri-strong:#2F55E8;
  --pulse:#34E5D0;
  --hot:#FF4D8D;
  --tx-0:#EAF0FF;
  --tx-1:#A9B6D3;
  --tx-2:#6C7A99;
  --line:rgba(255,255,255,.08);
  --line-2:rgba(255,255,255,.16);
  --glow:0 0 0 1px rgba(76,111,255,.35), 0 14px 40px -14px rgba(76,111,255,.55);
  --glow-sm:0 0 18px -6px rgba(76,111,255,.6);
  --r-card:16px;
  --r-inner:12px;
  --r-img:14px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg-0);
  color:var(--tx-1);
  font-family:Inter,"MiSans","HarmonyOS Sans","PingFang SC","Noto Sans SC","Microsoft YaHei",sans-serif;
  font-size:16px;
  line-height:1.9;
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button,input{font:inherit}
button{cursor:pointer;background:none;border:0;color:inherit}
h1,h2,h3{margin:0;color:var(--tx-0);line-height:1.3;letter-spacing:-.02em}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum"}

.container-x{width:100%;max-width:1200px;margin:0 auto;padding:0 40px}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(5,7,14,.72);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;gap:24px;height:72px}
.brand{display:inline-flex;align-items:center;gap:10px}
.brand-mark{
  width:10px;height:10px;border-radius:50%;background:var(--pulse);
  box-shadow:0 0 14px 2px rgba(52,229,208,.55);
  animation:dotPulse 2.6s ease-in-out infinite;
}
.brand-name{color:var(--tx-0);font-weight:700;font-size:16px;letter-spacing:.01em}
.nav-links{display:flex;align-items:center;gap:26px}
.nav-link{position:relative;font-size:14px;color:var(--tx-1);padding:6px 0;transition:color .2s ease}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:1px;
  background:var(--pulse);opacity:.85;transform:scaleX(0);transform-origin:left;
  transition:transform .22s ease;
}
.nav-link:hover{color:var(--tx-0)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.active{color:var(--tx-0)}
.nav-link.active::after{transform:scaleX(1)}
.nav-link.active::before{
  content:"";position:absolute;left:50%;bottom:-8px;width:2px;height:2px;border-radius:50%;
  background:var(--pulse);transform:translateX(-50%);
}
.nav-cta{
  display:inline-flex;align-items:center;height:36px;padding:0 16px;border-radius:999px;
  border:1px solid var(--line-2);color:var(--tx-0);font-size:13px;
  transition:border-color .2s ease,background .2s ease,color .2s ease;
}
.nav-cta:hover{border-color:var(--pulse);color:#fff;background:rgba(52,229,208,.06)}
.burger{
  display:none;width:40px;height:40px;border-radius:10px;border:1px solid var(--line);
  flex-direction:column;align-items:center;justify-content:center;gap:4px;
}
.burger span{display:block;width:16px;height:1.5px;border-radius:2px;background:var(--tx-0);transition:.2s ease}
.burger:hover{border-color:var(--line-2)}

.drawer{
  position:fixed;inset:0;z-index:80;padding:88px 24px 32px;
  background:rgba(5,7,14,.94);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
  transform:translateY(-100%);opacity:0;visibility:hidden;
  transition:transform .32s ease,opacity .28s ease,visibility .32s;
}
.drawer.open{transform:translateY(0);opacity:1;visibility:visible}
.drawer a.drawer-link{
  display:block;height:56px;line-height:56px;font-size:16px;color:var(--tx-1);
  border-bottom:1px solid var(--line);opacity:0;transform:translateY(-8px);
}
.drawer.open a.drawer-link{animation:drawerIn .4s ease forwards}
.drawer.open a.drawer-link:nth-child(1){animation-delay:.04s}
.drawer.open a.drawer-link:nth-child(2){animation-delay:.10s}
.drawer.open a.drawer-link:nth-child(3){animation-delay:.16s}
.drawer.open a.drawer-link:nth-child(4){animation-delay:.22s}
.drawer.open a.drawer-link:nth-child(5){animation-delay:.28s}
.drawer.open a.drawer-link:nth-child(6){animation-delay:.34s}
.drawer-close{
  position:absolute;top:24px;right:24px;width:40px;height:40px;border-radius:10px;
  border:1px solid var(--line);color:var(--tx-0);font-size:18px;line-height:1;
}
.drawer-close:hover{border-color:var(--pulse)}

/* ---------- page band ---------- */
.page-band{
  position:relative;min-height:300px;display:flex;align-items:flex-end;overflow:hidden;
  background-image:linear-gradient(rgba(5,7,14,.74),rgba(5,7,14,.84)),url('/assets/images/backpic/back-2.png');
  background-size:cover;background-position:center;
  border-bottom:1px solid var(--line);
}
.page-band::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);
  background-size:48px 48px;
}
.band-inner{position:relative;z-index:2;width:100%;padding:96px 0 48px}
.band-tag{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:999px;
  font-size:12px;letter-spacing:.12em;color:var(--pulse);
  background:rgba(52,229,208,.10);border:1px solid rgba(52,229,208,.24);margin-bottom:18px;
}
.breadcrumb{font-size:12px;color:var(--tx-2);letter-spacing:.04em;margin-bottom:16px}
.breadcrumb a{color:var(--tx-2);transition:color .2s ease}
.breadcrumb a:hover{color:var(--pri)}
.breadcrumb .sep{margin:0 8px;opacity:.55}
.breadcrumb .now{color:var(--tx-0)}
.band-h1{font-size:clamp(2rem,4.1vw,3.05rem);font-weight:700;letter-spacing:-.02em}
.band-sub{margin-top:14px;font-size:17px;line-height:1.8;color:var(--tx-1);max-width:720px}

/* ---------- sections ---------- */
.section{padding:96px 0}
.section-alt{background:var(--bg-1);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px}
.sec-title{font-size:clamp(1.6rem,2.6vw,2.25rem);font-weight:700}
.sec-desc{margin-top:12px;font-size:15px;line-height:1.8;color:var(--tx-2);max-width:620px}
.sec-link{font-size:14px;color:var(--pri);white-space:nowrap;transition:opacity .2s ease}
.sec-link:hover{opacity:.8;text-decoration:underline;text-underline-offset:4px}

/* ---------- rule list ---------- */
.rule-list{display:grid;gap:0;border-top:1px solid var(--line)}
.rule-row{
  display:grid;grid-template-columns:88px 1fr;gap:24px;align-items:start;
  padding:28px 20px;border-bottom:1px solid var(--line);border-radius:var(--r-inner);
  transition:background .2s ease;
}
.rule-row:hover{background:rgba(255,255,255,.03)}
.rule-idx{font-size:15px;color:var(--pulse);font-weight:600;letter-spacing:.08em}
.rule-h3{font-size:18px;font-weight:600;color:var(--tx-0)}
.rule-p{margin-top:8px;font-size:15px;color:var(--tx-1);max-width:820px}

/* ---------- faq ---------- */
.faq-layout{display:grid;grid-template-columns:.85fr 1.6fr;gap:48px;align-items:start}
.sticky-aside{position:sticky;top:104px}
.aside-card{
  margin-top:24px;padding:22px;border-radius:var(--r-card);
  background:var(--glass);border:1px solid rgba(255,255,255,.10);backdrop-filter:blur(14px);
}
.aside-card p{font-size:14px;color:var(--tx-1)}
.aside-card a{display:inline-block;margin-top:12px;font-size:14px;color:var(--pri)}
.aside-card a:hover{text-decoration:underline;text-underline-offset:4px}
.faq-list{display:grid;gap:12px}
.faq-item{
  border:1px solid var(--line);border-radius:var(--r-card);background:var(--glass);
  backdrop-filter:blur(14px);overflow:hidden;transition:border-color .2s ease,background .2s ease;
}
.faq-item:hover{border-color:var(--line-2)}
.faq-item.open{background:var(--bg-1);border-color:var(--line-2)}
.faq-h{margin:0}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:20px 24px;text-align:left;color:var(--tx-0);font-size:16px;font-weight:600;
}
.faq-q:focus-visible{outline:2px solid var(--pri);outline-offset:-2px}
.faq-icon{position:relative;width:16px;height:16px;flex:0 0 16px}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;background:var(--pulse);transition:transform .24s ease,opacity .24s ease}
.faq-icon::before{left:0;top:7.5px;width:16px;height:1px}
.faq-icon::after{left:7.5px;top:0;width:1px;height:16px}
.faq-item.open .faq-icon::after{transform:scaleY(0);opacity:0}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease}
.faq-a-inner{padding:0 24px 22px;font-size:15px;line-height:1.8;color:var(--tx-1)}
.faq-a-inner a{color:var(--pri)}
.faq-a-inner a:hover{text-decoration:underline;text-underline-offset:4px}

/* ---------- compare table ---------- */
.compare-wrap{
  border:1px solid var(--line);border-radius:var(--r-card);background:var(--glass);
  backdrop-filter:blur(14px);overflow:hidden;
}
.compare-scroll{overflow-x:auto}
table.compare{width:100%;border-collapse:separate;border-spacing:0;min-width:660px;font-size:15px}
.compare th,.compare td{padding:16px 22px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}
.compare thead th{
  font-size:13px;letter-spacing:.08em;color:var(--tx-2);font-weight:600;
  background:rgba(255,255,255,.02);
}
.compare td:first-child,.compare th:first-child{color:var(--tx-0);font-weight:600;width:26%}
.compare tbody tr:nth-child(even) td{background:rgba(255,255,255,.02)}
.compare tbody tr:hover td{background:rgba(76,111,255,.06)}
.compare tbody tr:last-child td{border-bottom:0}
.compare .cola{color:var(--tx-1)}
.compare .colb{color:var(--tx-0)}
.compare-note{margin-top:16px;font-size:14px;color:var(--tx-2)}

/* ---------- related ---------- */
.rec-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.rec-card{
  display:block;overflow:hidden;border-radius:var(--r-card);
  background:var(--glass);border:1px solid rgba(255,255,255,.10);backdrop-filter:blur(14px);
  box-shadow:0 8px 30px -18px rgba(0,0,0,.9);
  transition:transform .2s ease-out,border-color .2s ease,box-shadow .2s ease;
}
.rec-card:hover{transform:translateY(-2px);border-color:var(--line-2);box-shadow:0 18px 40px -20px rgba(0,0,0,.95)}
.rec-thumb{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:var(--r-card) var(--r-card) 0 0}
.rec-body{padding:20px 22px 22px}
.rec-cat{font-size:12px;letter-spacing:.1em;color:var(--pulse)}
.rec-title{margin-top:8px;font-size:16px;font-weight:600;color:var(--tx-0);line-height:1.55}
.rec-meta{margin-top:10px;font-size:13px;color:var(--tx-2)}
.rec-card:hover .rec-title{color:#fff}

/* ---------- cta ---------- */
.cta-bar{
  display:flex;align-items:center;justify-content:space-between;gap:24px;
  padding:28px 32px;border-radius:20px;
  background:linear-gradient(90deg,rgba(76,111,255,.16),rgba(52,229,208,.07));
  border:1px solid var(--line-2);backdrop-filter:blur(14px);
}
.cta-text{font-size:17px;font-weight:600;color:var(--tx-0)}
.cta-actions{display:flex;align-items:center;gap:12px}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 26px;border-radius:999px;border:1px solid transparent;
  font-size:15px;font-weight:600;transition:background .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out,color .2s ease-out,transform .12s ease-out,filter .2s ease-out;
}
.btn-pri{background:var(--pri);color:#fff;box-shadow:var(--glow);border-color:transparent}
.btn-pri:hover{filter:brightness(1.08);box-shadow:0 0 0 1px rgba(76,111,255,.5),0 18px 46px -14px rgba(76,111,255,.7)}
.btn-pri:active{background:var(--pri-strong);box-shadow:none;transform:scale(.985)}
.btn-ghost{border-color:rgba(255,255,255,.18);color:var(--tx-0)}
.btn-ghost:hover{border-color:var(--pulse);color:#fff;background:rgba(52,229,208,.06)}
.btn-ghost:active{transform:scale(.985)}
.btn-sm{height:44px;padding:0 20px;font-size:14px}
.btn:focus-visible{outline:2px solid var(--pri);outline-offset:2px}
.btn.is-on{background:rgba(52,229,208,.14);border-color:var(--pulse);color:#fff;box-shadow:none}

/* ---------- footer ---------- */
.site-footer{background:var(--bg-1);border-top:1px solid var(--line);padding:72px 0 32px}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.5fr;gap:40px}
.foot-desc{margin-top:16px;font-size:14px;line-height:1.8;color:var(--tx-2);max-width:280px}
.foot-title{font-size:13px;font-weight:600;letter-spacing:.12em;color:var(--tx-0);margin-bottom:16px}
.foot-list{display:grid;gap:10px}
.foot-list a{font-size:14px;color:var(--tx-1);transition:color .2s ease}
.foot-list a:hover{color:var(--tx-0)}
.sub-form{display:flex;gap:10px}
.sub-form input{
  flex:1;min-width:0;height:48px;padding:0 16px;border-radius:12px;
  background:var(--bg-2);border:1px solid var(--line);color:var(--tx-0);font-size:14px;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.sub-form input::placeholder{color:var(--tx-2)}
.sub-form input:focus{outline:none;border-color:var(--pri);box-shadow:var(--glow-sm)}
.sub-note{margin-top:12px;font-size:12px;color:var(--tx-2)}
.foot-bottom{
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  margin-top:56px;padding-top:24px;border-top:1px solid var(--line);
  font-size:13px;color:var(--tx-2);
}

@keyframes dotPulse{0%,100%{opacity:1;transform:scale(1)}50%{opacity:.55;transform:scale(.82)}}
@keyframes drawerIn{to{opacity:1;transform:translateY(0)}}

/* ---------- responsive ---------- */
@media (max-width:1279px){
  .nav-links{gap:20px}
}
@media (max-width:1023px){
  .nav-links{display:none}
  .nav-cta{display:none}
  .burger{display:flex}
  .nav-wrap{height:64px}
  .container-x{padding:0 32px}
  .section{padding:72px 0}
  .band-inner{padding:80px 0 40px}
  .faq-layout{grid-template-columns:1fr;gap:32px}
  .sticky-aside{position:static}
  .rec-grid{grid-template-columns:repeat(2,1fr)}
  .foot-grid{grid-template-columns:1fr 1fr;gap:32px}
  .page-band{min-height:280px}
}
@media (max-width:767px){
  .section{padding:56px 0}
  .band-inner{padding:68px 0 32px}
  .band-sub{font-size:16px}
  .cta-bar{flex-direction:column;align-items:stretch;padding:24px}
  .cta-actions{flex-direction:column;gap:10px}
  .cta-actions .btn{width:100%}
  .rule-row{grid-template-columns:1fr;gap:10px}
  .sec-head{flex-direction:column;align-items:flex-start;gap:12px}
  .page-band{min-height:260px}
}
@media (max-width:599px){
  .container-x{padding:0 20px}
  .rec-grid{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr}
  .sub-form{flex-direction:column}
  .sub-form .btn{width:100%}
  .faq-q{padding:18px 18px;font-size:15px}
  .faq-a-inner{padding:0 18px 20px}
}
@media (prefers-reduced-motion: reduce){
  *{animation:none !important;transition:none !important}
  html{scroll-behavior:auto}
}