/* roulang page: index */
:root{
  --bg-base:#08070F;
  --bg-alt:#0E0D1A;
  --bg-elev:#151327;
  --brand:#2BE8C8;
  --accent:#FFB454;
  --violet:#7A5CFF;
  --success:#37D67A;
  --warning:#FFB454;
  --error:#FF5C7A;
  --text-main:#EDF1F7;
  --text-sub:#9AA3B8;
  --text-weak:#6B7387;
  --glass-1:rgba(255,255,255,.055);
  --glass-2:rgba(255,255,255,.07);
  --glass-3:rgba(255,255,255,.10);
  --line:rgba(255,255,255,.08);
  --line-brand:rgba(43,232,200,.16);
  --radius-card:18px;
  --radius-panel:20px;
  --radius-cover:22px;
  --radius-input:12px;
  --radius-img:16px;
  --shadow-rest:0 8px 30px rgba(0,0,0,.45);
  --shadow-hover:0 16px 44px rgba(0,0,0,.55);
  --glow:0 0 0 1px rgba(43,232,200,.35),0 0 24px rgba(43,232,200,.22);
  --rail-w:240px;
  --ease:cubic-bezier(.2,.7,.3,1);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg-base);
  color:var(--text-main);
  font-family:"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Microsoft YaHei",sans-serif;
  font-size:16px;
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border-style:none;}
a{color:var(--brand);text-decoration:none;transition:color .2s var(--ease),opacity .2s var(--ease);}
a:hover{text-decoration:underline;text-underline-offset:4px;}
a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px;}
button,input{font:inherit;color:inherit;}
h1,h2,h3{margin:0;font-weight:700;letter-spacing:-.01em;line-height:1.3;}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
::selection{background:rgba(43,232,200,.28);color:#fff;}

/* ===== layout ===== */
.app{display:block;}
.main-wrap{margin-left:var(--rail-w);min-height:100vh;display:flex;flex-direction:column;}
.container{width:100%;max-width:1240px;margin:0 auto;padding:0 24px;}
main{flex:1 1 auto;padding-top:24px;}
.band{padding:96px 0;position:relative;}
.band--alt{background:var(--bg-alt);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.band-head{margin-bottom:40px;}
.band-head h2{font-size:30px;display:flex;align-items:center;gap:12px;}
.band-head h2::before{content:"";width:3px;height:26px;border-radius:3px;background:linear-gradient(180deg,var(--brand),var(--violet));display:inline-block;}
.band-head .cap{margin-top:10px;font-size:13px;letter-spacing:.02em;color:var(--text-sub);}
.band-head .cap::before{content:"";display:inline-block;width:6px;height:6px;border-radius:50%;background:var(--brand);margin-right:8px;vertical-align:middle;}

/* ===== left rail ===== */
.rail{
  position:fixed;top:0;left:0;bottom:0;width:var(--rail-w);
  display:flex;flex-direction:column;gap:20px;padding:24px 18px;
  background:linear-gradient(180deg,#0C0B16 0%,#08070F 100%);
  border-right:1px solid rgba(43,232,200,.10);
  z-index:60;
}
.rail::after{content:"";position:absolute;right:-1px;top:0;bottom:0;width:1px;background:linear-gradient(180deg,transparent,rgba(43,232,200,.35),transparent);}
.brand{display:flex;align-items:center;gap:12px;padding:6px 8px 18px;}
.brand-mark{
  width:42px;height:42px;flex:0 0 42px;border-radius:13px;
  background:linear-gradient(135deg,var(--brand),var(--violet));
  display:grid;place-items:center;color:#08070F;font-weight:800;font-size:16px;
  box-shadow:var(--glow);
}
.brand-text{display:flex;flex-direction:column;line-height:1.25;}
.brand-text .main-word{font-size:17px;font-weight:800;letter-spacing:.02em;color:var(--text-main);}
.brand-text .sub-word{font-size:calc(17px * .44);letter-spacing:.08em;color:var(--text-sub);text-transform:none;margin-top:3px;}
.rail-nav{display:flex;flex-direction:column;gap:6px;}
.rail-link{
  display:flex;align-items:center;gap:12px;padding:12px 14px;border-radius:12px;
  color:var(--text-sub);font-size:15px;position:relative;
  transition:background .22s var(--ease),color .22s var(--ease),transform .22s var(--ease);
}
.rail-link i{width:20px;text-align:center;font-size:16px;}
.rail-link:hover{background:rgba(255,255,255,.045);color:var(--text-main);text-decoration:none;transform:translateX(2px);}
.rail-link.active{color:var(--brand);background:rgba(43,232,200,.08);}
.rail-link.active::before{content:"";position:absolute;left:0;top:12px;bottom:12px;width:3px;border-radius:0 3px 3px 0;background:var(--brand);}
.rail-foot{margin-top:auto;display:flex;flex-direction:column;gap:10px;}
.rail-tip{font-size:12px;color:var(--text-weak);line-height:1.7;padding:0 8px;}

/* ===== buttons ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border:none;cursor:pointer;font-weight:700;font-size:15px;
  padding:14px 28px;border-radius:999px;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),background .22s var(--ease),color .22s var(--ease),filter .22s var(--ease);
}
.btn-primary{
  background:linear-gradient(135deg,var(--accent),#FFD08A);
  color:#08070F;box-shadow:0 0 0 1px rgba(255,180,84,.35),0 10px 28px rgba(255,180,84,.22);
}
.btn-primary:hover{filter:brightness(1.08);box-shadow:0 0 0 1px rgba(255,180,84,.5),0 14px 34px rgba(255,180,84,.32);transform:translateY(-2px);text-decoration:none;}
.btn-primary:active{transform:translateY(1px);box-shadow:0 0 0 1px rgba(255,180,84,.35),0 4px 14px rgba(255,180,84,.2);}
.btn-ghost{
  background:transparent;color:var(--brand);border:1px solid rgba(43,232,200,.4);
}
.btn-ghost:hover{background:rgba(43,232,200,.10);transform:translateY(-2px);text-decoration:none;}
.btn-ghost:active{transform:translateY(1px);}
.btn-block{width:100%;}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed;box-shadow:none;filter:none;transform:none;}
.btn-text{color:var(--brand);font-weight:600;font-size:14px;background:none;border:none;cursor:pointer;padding:6px 0;}
.btn-text:hover{text-decoration:underline;text-underline-offset:4px;filter:brightness(1.12);}

/* ===== badges ===== */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12px;letter-spacing:.02em;font-weight:600;
  padding:4px 12px;border-radius:999px;
  background:rgba(43,232,200,.12);color:var(--brand);
  border:1px solid rgba(43,232,200,.18);
}
.badge--accent{background:rgba(255,180,84,.14);color:var(--accent);border-color:rgba(255,180,84,.24);}
.badge--muted{background:rgba(255,255,255,.06);color:var(--text-sub);border-color:var(--line);}
.badge--success{background:rgba(55,214,122,.14);color:var(--success);border-color:rgba(55,214,122,.24);}

/* ===== hero ===== */
.hero{position:relative;padding:72px 0 88px;overflow:hidden;}
.hero-bg{
  position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-1.webp');
  background-size:cover;background-position:center;
  opacity:.5;
}
.hero-bg::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(8,7,15,.92) 0%,rgba(8,7,15,.5) 55%,rgba(8,7,15,.96) 100%),
             repeating-linear-gradient(135deg,rgba(255,255,255,.035) 0 2px,transparent 2px 8px);
}
.hero-inner{position:relative;display:grid;grid-template-columns:6fr 5fr;gap:48px;align-items:center;}
.hero-eyebrow{display:inline-flex;align-items:center;gap:10px;font-size:13px;color:var(--text-sub);letter-spacing:.08em;margin-bottom:20px;}
.hero-eyebrow .dot{width:8px;height:8px;border-radius:50%;background:var(--success);box-shadow:0 0 10px var(--success);}
h1{font-size:44px;line-height:1.24;letter-spacing:-.02em;}
h1 .hl{background:linear-gradient(120deg,var(--brand),var(--accent));-webkit-background-clip:text;background-clip:text;color:transparent;}
.hero-sub{margin-top:18px;font-size:16px;color:var(--text-sub);max-width:560px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px;}
.hero-points{display:flex;flex-wrap:wrap;gap:10px;margin-top:30px;}
.hero-points span{
  font-size:13px;color:var(--text-sub);padding:7px 14px;border-radius:999px;
  background:var(--glass-1);border:1px solid var(--line-brand);
}
.phone{
  position:relative;width:100%;max-width:320px;margin:0 auto;aspect-ratio:9/16;
  border-radius:28px;overflow:hidden;
  border:1px solid rgba(255,255,255,.1);
  box-shadow:var(--shadow-hover),0 0 0 10px rgba(255,255,255,.02);
  background:#0B0A14;
}
.phone img{width:100%;height:100%;object-fit:cover;}
.phone::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(8,7,15,.35),rgba(8,7,15,.05) 40%,rgba(8,7,15,.85));}
.phone-bar{position:absolute;left:0;right:0;top:0;height:34px;display:flex;align-items:center;justify-content:space-between;padding:0 16px;font-size:11px;color:rgba(237,241,247,.72);z-index:3;}
.phone-play{
  position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);
  width:66px;height:66px;border-radius:50%;z-index:3;
  background:rgba(255,255,255,.10);backdrop-filter:blur(14px) saturate(120%);
  border:1px solid var(--line-brand);display:grid;place-items:center;
}
.phone-play i{color:var(--brand);font-size:22px;margin-left:4px;}
.phone-foot{position:absolute;left:0;right:0;bottom:0;padding:16px;z-index:3;display:flex;justify-content:space-between;align-items:center;font-size:12px;color:var(--text-sub);}
.duration{font-size:12px;padding:4px 10px;border-radius:999px;background:rgba(8,7,15,.7);border:1px solid var(--line);color:var(--text-main);}

/* ===== horizontal rails ===== */
.track-wrap{position:relative;}
.track{
  display:flex;gap:16px;overflow-x:auto;scroll-snap-type:x mandatory;
  padding:4px 24px 12px;scrollbar-width:none;-ms-overflow-style:none;
}
.track::-webkit-scrollbar{display:none;}
.track-wrap::before,.track-wrap::after{
  content:"";position:absolute;top:0;bottom:0;width:48px;pointer-events:none;z-index:2;
}
.track-wrap::before{left:0;background:linear-gradient(90deg,var(--bg-base),transparent);}
.track-wrap::after{right:0;background:linear-gradient(270deg,var(--bg-base),transparent);}
.band--alt .track-wrap::before{background:linear-gradient(90deg,var(--bg-alt),transparent);}
.band--alt .track-wrap::after{background:linear-gradient(270deg,var(--bg-alt),transparent);}
.clip-card{
  flex:0 0 272px;width:272px;scroll-snap-align:start;
  border-radius:var(--radius-cover);overflow:hidden;position:relative;
  background:var(--glass-1);border:1px solid var(--line);
  box-shadow:var(--shadow-rest);
  transition:transform .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.clip-card:hover{transform:translateY(-4px);border-color:rgba(43,232,200,.35);box-shadow:var(--shadow-hover);}
.clip-media{position:relative;aspect-ratio:9/16;overflow:hidden;background:var(--bg-elev);}
.clip-media img{width:100%;height:100%;object-fit:cover;transition:transform .22s var(--ease);}
.clip-card:hover .clip-media img{transform:scale(1.04);}
.clip-media::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(8,7,15,.15) 0%,rgba(8,7,15,.1) 45%,rgba(8,7,15,.92) 100%);}
.clip-badge{position:absolute;top:12px;right:12px;z-index:2;}
.clip-info{position:absolute;left:0;right:0;bottom:0;padding:14px;z-index:2;}
.clip-info h3{font-size:15px;line-height:1.45;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.clip-meta{margin-top:8px;display:flex;align-items:center;justify-content:space-between;font-size:12px;color:var(--text-sub);}
.clip-meta i{color:var(--brand);}
.placeholder{background:linear-gradient(135deg,#171531,#0E0D1A);display:grid;place-items:center;}
.placeholder i{font-size:34px;color:rgba(43,232,200,.5);}

/* ===== offset two columns ===== */
.offset-grid{display:grid;grid-template-columns:7fr 5fr;gap:32px;align-items:start;}
.panel{
  background:var(--glass-1);border:1px solid var(--line-brand);border-radius:var(--radius-panel);
  padding:32px;backdrop-filter:blur(14px) saturate(120%);box-shadow:var(--shadow-rest);
}
.panel h3{font-size:19px;margin-bottom:12px;}
.panel p{color:var(--text-sub);font-size:15px;}
.panel-media{margin-top:22px;border-radius:var(--radius-img);overflow:hidden;border:1px solid rgba(255,255,255,.08);}
.panel-media img{width:100%;height:230px;object-fit:cover;}
.stack{display:flex;flex-direction:column;gap:20px;}
.mini-card{
  background:var(--glass-2);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:24px;box-shadow:var(--shadow-rest);
  transition:transform .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.mini-card:hover{transform:translateY(-4px);border-color:rgba(43,232,200,.3);box-shadow:var(--shadow-hover);}
.mini-card .num{font-size:13px;font-weight:800;color:var(--accent);letter-spacing:.14em;}
.mini-card h3{font-size:17px;margin:10px 0 8px;}
.mini-card p{font-size:14px;color:var(--text-sub);}
.metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:24px;}
.metric{background:rgba(255,255,255,.04);border:1px solid var(--line);border-radius:14px;padding:16px;text-align:center;}
.metric b{display:block;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:22px;color:var(--brand);}
.metric span{font-size:12px;color:var(--text-weak);letter-spacing:.02em;}

/* ===== numbered list ===== */
.num-list{border-top:1px solid var(--line);}
.num-item{
  display:flex;align-items:center;gap:24px;padding:24px 8px;border-bottom:1px solid rgba(255,255,255,.07);
  transition:transform .22s var(--ease),background .22s var(--ease);
}
.num-item:hover{transform:translateX(4px);background:rgba(255,255,255,.035);}
.num-item .idx{
  font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:32px;font-weight:700;
  color:transparent;-webkit-text-stroke:1px rgba(43,232,200,.65);flex:0 0 64px;
}
.num-item:hover .idx{color:var(--brand);-webkit-text-stroke:1px var(--brand);}
.num-body{flex:1 1 auto;}
.num-body h3{font-size:17px;}
.num-body p{font-size:14px;color:var(--text-sub);margin-top:6px;}
.num-thumb{
  flex:0 0 96px;width:96px;height:96px;border-radius:16px;overflow:hidden;
  border:1px solid rgba(255,255,255,.08);
}
.num-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .22s var(--ease);}
.num-item:hover .num-thumb img{transform:scale(1.04);}

/* ===== form panel ===== */
.form-grid{display:grid;grid-template-columns:5fr 7fr;gap:40px;align-items:center;}
.form-panel{
  background:var(--glass-3);border:1px solid var(--line-brand);border-radius:var(--radius-panel);
  padding:32px;backdrop-filter:blur(14px) saturate(120%);box-shadow:var(--shadow-hover);
}
.field{margin-bottom:18px;}
.field label{display:block;font-size:13px;color:var(--text-sub);margin-bottom:8px;letter-spacing:.02em;}
.field input[type="text"],.field input[type="password"]{
  width:100%;height:48px;padding:0 16px;border-radius:var(--radius-input);
  background:rgba(255,255,255,.04);border:1px solid var(--line);color:var(--text-main);
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease),background .2s var(--ease);
}
.field input::placeholder{color:var(--text-weak);}
.field input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 4px rgba(43,232,200,.12);background:rgba(255,255,255,.06);}
.field.has-error input{border-color:var(--error);}
.field-err{display:none;margin-top:8px;font-size:12px;color:var(--error);align-items:center;gap:6px;}
.field.has-error .field-err{display:flex;}
.form-row{display:flex;align-items:center;justify-content:space-between;margin:4px 0 20px;font-size:13px;color:var(--text-sub);}
.check{display:inline-flex;align-items:center;gap:8px;cursor:pointer;}
.check input{width:16px;height:16px;accent-color:var(--brand);}
.form-hint{margin-top:16px;font-size:13px;color:var(--text-weak);text-align:center;}
.form-hint a{font-weight:600;}
.form-ok{
  display:none;margin-bottom:18px;font-size:13px;padding:12px 16px;border-radius:12px;
  background:rgba(55,214,122,.12);border:1px solid rgba(55,214,122,.28);color:var(--success);
  align-items:center;gap:8px;
}
.form-ok.show{display:flex;}
.form-list{display:flex;flex-direction:column;gap:16px;margin-top:26px;}
.form-list li{display:flex;gap:12px;font-size:15px;color:var(--text-sub);}
.form-list li i{color:var(--brand);margin-top:5px;}

/* ===== testimonials ===== */
.marquee{overflow:hidden;position:relative;padding:8px 0;}
.marquee::before,.marquee::after{content:"";position:absolute;top:0;bottom:0;width:80px;z-index:2;pointer-events:none;}
.marquee::before{left:0;background:linear-gradient(90deg,var(--bg-base),transparent);}
.marquee::after{right:0;background:linear-gradient(270deg,var(--bg-base),transparent);}
.marquee-track{display:flex;gap:16px;width:max-content;animation:slideL 28s linear infinite;}
.marquee-track.reverse{animation:slideR 36s linear infinite;margin-top:16px;}
.marquee:hover .marquee-track{animation-play-state:paused;}
@keyframes slideL{from{transform:translateX(0);}to{transform:translateX(-50%);}}
@keyframes slideR{from{transform:translateX(-50%);}to{transform:translateX(0);}}
.quote{
  width:300px;flex:0 0 300px;background:var(--glass-1);border:1px solid var(--line);
  border-radius:var(--radius-card);padding:20px;
}
.quote-head{display:flex;align-items:center;gap:12px;margin-bottom:12px;}
.avatar{
  width:48px;height:48px;flex:0 0 48px;border-radius:50%;
  background:rgba(43,232,200,.10);border:1px solid var(--line-brand);
  display:grid;place-items:center;color:var(--brand);font-weight:700;
}
.quote-name{font-size:14px;font-weight:600;}
.stars{font-size:12px;color:var(--accent);letter-spacing:2px;}
.quote p{font-size:14px;color:var(--text-sub);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}

/* ===== cms list ===== */
.cms-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;}
.cms-item{
  display:flex;gap:18px;padding:20px;border-radius:var(--radius-card);
  background:var(--glass-1);border:1px solid var(--line);box-shadow:var(--shadow-rest);
  transition:transform .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.cms-item:hover{transform:translateY(-4px);border-color:rgba(43,232,200,.3);box-shadow:var(--shadow-hover);}
.cms-item.feature{grid-column:span 2;}
.cms-cover{
  flex:0 0 132px;width:132px;border-radius:var(--radius-img);overflow:hidden;
  border:1px solid rgba(255,255,255,.08);background:var(--bg-elev);
}
.cms-cover img{width:100%;height:100%;min-height:150px;object-fit:cover;}
.cms-body{flex:1 1 auto;display:flex;flex-direction:column;}
.cms-body h3{font-size:17px;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.cms-body h3 a{color:var(--text-main);}
.cms-body h3 a:hover{color:var(--brand);text-decoration:none;}
.cms-body p{margin-top:8px;font-size:14px;color:var(--text-sub);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.cms-meta{margin-top:auto;padding-top:14px;display:flex;align-items:center;gap:12px;font-size:12px;color:var(--text-weak);}
.cms-meta .arrow{margin-left:auto;color:var(--brand);}
.empty-state{
  min-height:160px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;
  background:var(--glass-1);border:1px solid var(--line);border-radius:var(--radius-panel);
  color:var(--text-sub);font-size:14px;
}
.empty-state i{font-size:40px;color:rgba(43,232,200,.6);}

/* ===== faq ===== */
.faq{display:flex;flex-direction:column;gap:14px;}
.faq-item{
  background:var(--glass-1);border:1px solid var(--line);border-radius:var(--radius-card);
  overflow:hidden;transition:border-color .22s var(--ease),background .22s var(--ease);
}
.faq-item:hover{border-color:rgba(43,232,200,.28);}
.faq-item.open{border-color:rgba(43,232,200,.4);background:var(--glass-2);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 24px;background:none;border:none;cursor:pointer;text-align:left;
  font-size:17px;font-weight:700;color:var(--text-main);
}
.faq-q i{color:var(--brand);transition:transform .22s var(--ease);flex:0 0 auto;}
.faq-item.open .faq-q i{transform:rotate(45deg);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s var(--ease);}
.faq-a p{padding:0 24px 22px;font-size:15px;line-height:1.9;color:var(--text-sub);}

/* ===== cta band ===== */
.cta-band{
  background:linear-gradient(120deg,rgba(43,232,200,.10),rgba(122,92,255,.10));
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
}
.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;}
.cta-inner h2{font-size:26px;}
.cta-inner p{color:var(--text-sub);margin-top:8px;font-size:15px;}

/* ===== sticky cta ===== */
.sticky-cta{
  position:fixed;left:calc(var(--rail-w) + 24px);right:24px;bottom:20px;z-index:70;
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:16px 22px;border-radius:999px;
  background:rgba(21,19,39,.85);backdrop-filter:blur(14px) saturate(120%);
  border:1px solid var(--line-brand);box-shadow:var(--shadow-hover);
  opacity:0;transform:translateY(20px);pointer-events:none;
  transition:opacity .26s var(--ease),transform .26s var(--ease);
}
.sticky-cta.show{opacity:1;transform:translateY(0);pointer-events:auto;}
.sticky-cta .txt{display:flex;flex-direction:column;line-height:1.4;}
.sticky-cta .txt b{font-size:15px;}
.sticky-cta .txt span{font-size:12px;color:var(--text-sub);}

/* ===== footer ===== */
.footer{background:#06050C;border-top:1px solid rgba(43,232,200,.10);padding:64px 0 32px;margin-top:0;}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:32px;}
.footer .brand{padding:0 0 16px;}
.footer-about{font-size:14px;color:var(--text-sub);max-width:340px;}
.footer h3{font-size:15px;margin-bottom:16px;}
.footer ul{display:flex;flex-direction:column;gap:10px;}
.footer ul a{color:var(--text-sub);font-size:14px;}
.footer ul a:hover{color:var(--brand);text-decoration:none;}
.footer-bottom{
  margin-top:48px;padding-top:22px;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:var(--text-weak);
}
.to-top{color:var(--text-sub);font-size:13px;display:inline-flex;align-items:center;gap:8px;}
.to-top:hover{color:var(--brand);text-decoration:none;}

/* ===== mobile topbar + drawer ===== */
.topbar{
  display:none;position:fixed;top:0;left:0;right:0;height:64px;z-index:80;
  align-items:center;justify-content:space-between;padding:0 16px;
  background:rgba(8,7,15,.9);backdrop-filter:blur(14px) saturate(120%);
  border-bottom:1px solid rgba(43,232,200,.18);
}
.topbar .brand{padding:0;gap:10px;}
.topbar .brand-mark{width:36px;height:36px;flex:0 0 36px;border-radius:11px;font-size:14px;}
.topbar .brand-text .main-word{font-size:15px;}
.hamburger{
  width:44px;height:44px;border-radius:12px;background:var(--glass-1);
  border:1px solid var(--line);color:var(--brand);display:grid;place-items:center;cursor:pointer;font-size:18px;
}
.drawer-mask{
  position:fixed;inset:0;background:rgba(4,4,10,.6);backdrop-filter:blur(2px);z-index:90;
  opacity:0;pointer-events:none;transition:opacity .24s var(--ease);
}
.drawer-mask.show{opacity:1;pointer-events:auto;}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:82vw;max-width:340px;z-index:95;
  background:linear-gradient(180deg,#0C0B16,#08070F);border-left:1px solid var(--line-brand);
  padding:24px 20px;display:flex;flex-direction:column;gap:20px;
  transform:translateX(100%);transition:transform .26s var(--ease);
}
.drawer.show{transform:translateX(0);}
.drawer .rail-nav{flex:1 1 auto;}
.drawer-close{
  align-self:flex-end;width:40px;height:40px;border-radius:12px;background:var(--glass-1);
  border:1px solid var(--line);color:var(--text-main);cursor:pointer;font-size:16px;
}

/* ===== responsive ===== */
@media (max-width:1439px){
  .container{padding:0 20px;}
}
@media (max-width:1279px){
  :root{--rail-w:88px;}
  .rail{padding:24px 12px;align-items:center;}
  .rail .brand-text,.rail .rail-link span,.rail .rail-tip{display:none;}
  .rail .brand{justify-content:center;padding:6px 0 18px;}
  .rail-link{justify-content:center;padding:12px;}
  .rail-foot{align-items:center;width:100%;}
  .rail-foot .btn{padding:12px;width:48px;font-size:0;}
  .rail-foot .btn i{font-size:16px;}
  .sticky-cta{left:calc(var(--rail-w) + 20px);}
  .hero-inner{grid-template-columns:7fr 5fr;gap:32px;}
  h1{font-size:36px;}
  .band{padding:72px 0;}
}
@media (max-width:1023px){
  :root{--rail-w:0px;}
  .rail{display:none;}
  .topbar{display:flex;}
  .main-wrap{margin-left:0;padding-top:64px;}
  main{padding-top:0;}
  .hero{padding:48px 0 64px;}
  .hero-inner{grid-template-columns:1fr;gap:40px;}
  .phone{max-width:260px;}
  h1{font-size:32px;}
  .band{padding:56px 0;}
  .band-head h2{font-size:24px;}
  .offset-grid{grid-template-columns:1fr;}
  .form-grid{grid-template-columns:1fr;gap:28px;}
  .cms-grid{grid-template-columns:1fr;}
  .cms-item.feature{grid-column:span 1;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
  .marquee-track.reverse{display:none;}
  .sticky-cta{
    left:12px;right:12px;bottom:12px;border-radius:20px;padding:14px 18px;
  }
  .footer{padding-bottom:104px;}
}
@media (max-width:767px){
  .container{padding:0 16px;}
  h1{font-size:28px;}
  .hero-sub{font-size:15px;}
  .hero-actions{gap:10px;}
  .hero-actions .btn{width:100%;}
  .band{padding:48px 0;}
  .band-head h2{font-size:22px;}
  .panel{padding:22px;}
  .form-panel{padding:22px;}
  .clip-card{flex:0 0 216px;width:216px;}
  .num-item{gap:14px;padding:18px 4px;}
  .num-item .idx{font-size:24px;flex:0 0 44px;}
  .num-thumb{flex:0 0 72px;width:72px;height:72px;}
  .cms-item{flex-direction:column;}
  .cms-cover{flex:none;width:100%;}
  .cms-cover img{min-height:170px;}
  .metrics{grid-template-columns:1fr 1fr;}
  .footer-grid{grid-template-columns:1fr;}
  .faq-q{font-size:15px;padding:16px 18px;}
  .faq-a p{padding:0 18px 18px;font-size:14px;}
  .cta-inner h2{font-size:21px;}
  .sticky-cta .txt span{display:none;}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important;}
  .marquee-track{animation:none !important;}
  html{scroll-behavior:auto;}
}

/* roulang page: article */
:root{
  --bg-base:#08070F;
  --bg-alt:#0E0D1A;
  --bg-elev:#151327;
  --brand:#2BE8C8;
  --brand-08:rgba(43,232,200,.08);
  --brand-12:rgba(43,232,200,.12);
  --brand-16:rgba(43,232,200,.16);
  --brand-35:rgba(43,232,200,.35);
  --accent:#FFB454;
  --violet:#7A5CFF;
  --text-1:#EDF1F7;
  --text-2:#9AA3B8;
  --text-3:#6B7387;
  --line:rgba(255,255,255,.08);
  --line-soft:rgba(255,255,255,.055);
  --glass-1:rgba(255,255,255,.055);
  --glass-2:rgba(255,255,255,.07);
  --glass-3:rgba(255,255,255,.10);
  --ok:#37D67A;
  --warn:#FFB454;
  --err:#FF5C7A;
  --r-card:18px;
  --r-panel:20px;
  --r-cover:22px;
  --r-img:16px;
  --r-input:12px;
  --r-pill:999px;
  --sh-1:0 8px 30px rgba(0,0,0,.45);
  --sh-2:0 16px 44px rgba(0,0,0,.55);
  --glow:0 0 0 1px rgba(43,232,200,.35), 0 0 24px rgba(43,232,200,.22);
  --rail-w:240px;
  --ease:cubic-bezier(.2,.7,.3,1);
}
*,*::before,*::after{box-sizing:border-box}
html,body{margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  background:var(--bg-base);
  color:var(--text-1);
  font-family:"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Microsoft YaHei",sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  background-image:
    radial-gradient(900px 600px at 80% -12%, rgba(122,92,255,.20), transparent 62%),
    radial-gradient(760px 520px at 8% 108%, rgba(43,232,200,.10), transparent 66%);
  pointer-events:none;
  z-index:0;
}
img{max-width:100%;display:block}
a{color:var(--brand);text-decoration:none;transition:color .2s var(--ease),opacity .2s var(--ease)}
a:hover{text-decoration:underline;text-underline-offset:4px}
a:focus-visible,button:focus-visible,input:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px}
button{font-family:inherit;cursor:pointer}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:-.01em;line-height:1.28}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
.container{width:100%;max-width:1240px;margin:0 auto;padding:0 24px}
.skip{position:absolute;left:-9999px;top:0}
.skip:focus{left:16px;top:12px;z-index:200;background:var(--bg-elev);color:var(--brand);padding:10px 16px;border-radius:10px}

/* 左侧导航 */
.rail{
  position:fixed;top:0;left:0;bottom:0;width:var(--rail-w);z-index:80;
  display:flex;flex-direction:column;gap:22px;
  padding:24px 18px;
  background:linear-gradient(180deg, rgba(14,13,26,.92), rgba(8,7,15,.88));
  backdrop-filter:blur(14px) saturate(120%);
  border-right:1px solid var(--line);
}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none}
.brand:hover{text-decoration:none}
.brand-mark{
  flex:0 0 auto;width:40px;height:40px;border-radius:13px;
  display:grid;place-items:center;
  background:linear-gradient(135deg,var(--brand),var(--violet));
  color:#08070F;font-weight:800;font-size:14px;letter-spacing:.02em;
}
.brand-text{display:flex;flex-direction:column;gap:2px;min-width:0}
.main-word{font-size:16px;font-weight:700;color:var(--text-1);letter-spacing:-.01em}
.sub-word{font-size:10px;letter-spacing:.08em;color:var(--text-3)}
.rail-nav{display:flex;flex-direction:column;gap:6px;flex:1 1 auto}
.rail-link{
  position:relative;display:flex;align-items:center;gap:12px;
  padding:12px 12px;border-radius:12px;
  color:var(--text-2);font-size:14.5px;text-decoration:none;
  transition:background .2s var(--ease),color .2s var(--ease),transform .2s var(--ease);
}
.rail-link i{width:20px;font-size:15px;text-align:center;color:var(--text-3);transition:color .2s var(--ease)}
.rail-link::before{
  content:"";position:absolute;left:-8px;top:50%;transform:translateY(-50%);
  width:3px;height:20px;border-radius:2px;background:var(--brand);opacity:0;
  transition:opacity .2s var(--ease);
}
.rail-link:hover{background:var(--glass-1);color:var(--text-1);text-decoration:none}
.rail-link:hover i{color:var(--brand)}
.rail-link.active{background:var(--brand-08);color:var(--brand);font-weight:600}
.rail-link.active i{color:var(--brand)}
.rail-link.active::before{opacity:1}
.rail-foot{display:flex;flex-direction:column;gap:10px}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border:none;border-radius:var(--r-pill);
  padding:13px 26px;font-size:15px;font-weight:600;line-height:1;
  text-decoration:none;white-space:nowrap;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),background .22s var(--ease),opacity .22s var(--ease);
}
.btn:hover{text-decoration:none}
.btn-primary{
  background:linear-gradient(135deg,var(--accent),#FFD08A);
  color:#08070F;
  box-shadow:0 0 0 1px rgba(255,180,84,.30), 0 0 22px rgba(255,180,84,.22);
}
.btn-primary:hover{filter:brightness(1.08);transform:translateY(-2px);box-shadow:0 0 0 1px rgba(255,180,84,.45),0 0 30px rgba(255,180,84,.34)}
.btn-primary:active{transform:translateY(1px);box-shadow:0 0 0 1px rgba(255,180,84,.35)}
.btn-ghost{
  background:transparent;color:var(--brand);
  border:1px solid var(--brand-35);
}
.btn-ghost:hover{background:rgba(43,232,200,.10);transform:translateY(-2px)}
.btn-ghost:active{transform:translateY(1px)}
.btn-block{width:100%}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed;box-shadow:none;transform:none}
.rail-cta{padding:12px 14px;font-size:14px}
.rail-mini{
  display:flex;align-items:center;justify-content:center;gap:8px;
  padding:10px;font-size:13px;color:var(--text-3);border-radius:10px;
  transition:color .2s var(--ease),background .2s var(--ease);
}
.rail-mini:hover{color:var(--brand);background:var(--glass-1);text-decoration:none}

/* 顶部条与抽屉 */
.topbar{display:none;position:fixed;top:0;left:0;right:0;height:64px;z-index:90;
  align-items:center;justify-content:space-between;padding:0 16px;
  background:rgba(14,13,26,.88);backdrop-filter:blur(14px) saturate(120%);
  border-bottom:1px solid rgba(43,232,200,.18);
}
.hamburger{
  width:42px;height:42px;border-radius:12px;border:1px solid var(--line);
  background:var(--glass-1);color:var(--text-1);font-size:16px;
  display:grid;place-items:center;
  transition:background .2s var(--ease),color .2s var(--ease);
}
.hamburger:hover{background:var(--brand-12);color:var(--brand)}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:82vw;max-width:340px;z-index:120;
  transform:translateX(102%);
  transition:transform .26s var(--ease);
  background:linear-gradient(180deg,rgba(21,19,39,.98),rgba(8,7,15,.98));
  border-left:1px solid var(--line);
  padding:20px;display:flex;flex-direction:column;gap:18px;
  overflow-y:auto;
}
.drawer.open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;gap:12px}
.drawer-close{width:38px;height:38px;border-radius:10px;border:1px solid var(--line);background:var(--glass-1);color:var(--text-1)}
.drawer-close:hover{background:var(--brand-12);color:var(--brand)}
.drawer-nav{display:flex;flex-direction:column;gap:6px}
.drawer-nav a{
  display:flex;align-items:center;gap:12px;padding:13px 12px;border-radius:12px;
  color:var(--text-2);font-size:15px;
}
.drawer-nav a i{width:20px;text-align:center;color:var(--text-3)}
.drawer-nav a:hover,.drawer-nav a.active{background:var(--brand-08);color:var(--brand);text-decoration:none}
.drawer-nav a.active i,.drawer-nav a:hover i{color:var(--brand)}
.drawer-mask{
  position:fixed;inset:0;z-index:110;background:rgba(4,4,10,.66);
  opacity:0;pointer-events:none;transition:opacity .24s var(--ease);
}
.drawer-mask.open{opacity:1;pointer-events:auto}

/* 页面主体 */
.page{position:relative;z-index:1;margin-left:var(--rail-w);display:flex;flex-direction:column;min-height:100vh}
main{flex:1 1 auto;padding:44px 0 0}

/* 面包屑 */
.breadcrumb{font-size:13px;color:var(--text-3);display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.breadcrumb a{color:var(--text-2)}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb .sep{color:var(--text-3);opacity:.7}
.breadcrumb .now{color:var(--text-3);max-width:280px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* 文章头 */
.article-shell{max-width:900px;margin:0 auto;padding:0 0 8px}
.article-head{
  position:relative;margin-top:22px;padding:38px 34px 34px;
  border-radius:var(--r-panel);
  border:1px solid var(--line);
  background:linear-gradient(180deg, rgba(21,19,39,.72), rgba(14,13,26,.62));
  box-shadow:var(--sh-1);
  overflow:hidden;
}
.article-head::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;
  opacity:.14;
}
.article-head > *{position:relative;z-index:1}
.meta-row{display:flex;align-items:center;gap:14px;flex-wrap:wrap;margin-bottom:16px}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12px;font-weight:600;letter-spacing:.02em;
  padding:5px 12px;border-radius:var(--r-pill);
  background:var(--brand-12);color:var(--brand);
}
.badge-accent{background:rgba(255,180,84,.14);color:var(--accent)}
.meta-item{font-size:13px;color:var(--text-3);display:inline-flex;align-items:center;gap:6px}
.article-head h1{font-size:38px;line-height:1.3;color:var(--text-1);margin-bottom:14px}
.article-lead{font-size:15.5px;color:var(--text-2);max-width:660px}

/* 正文 */
.article-body{
  max-width:800px;margin:40px auto 0;
  font-size:16.5px;line-height:1.9;color:#D9DFE9;
}
.article-body p{margin:0 0 22px}
.article-body h2{
  font-size:26px;margin:48px 0 18px;padding-left:14px;
  border-left:3px solid var(--brand);color:var(--text-1);
}
.article-body h3{font-size:19px;margin:34px 0 14px;color:var(--text-1)}
.article-body ul,.article-body ol{padding-left:1.25em;margin:0 0 22px}
.article-body ul{list-style:disc}
.article-body ol{list-style:decimal}
.article-body li{margin:10px 0;line-height:1.8}
.article-body li::marker{color:var(--brand)}
.article-body blockquote{
  margin:28px 0;padding:18px 22px;
  border-left:3px solid var(--brand);
  border-radius:0 14px 14px 0;
  background:rgba(255,255,255,.05);
  backdrop-filter:blur(14px) saturate(120%);
  color:var(--text-2);
}
.article-body blockquote p:last-child{margin:0}
.article-body img{width:100%;height:auto;border-radius:var(--r-img);border:1px solid rgba(255,255,255,.08);margin:10px 0 12px}
.article-body a{color:var(--brand);text-decoration:underline;text-underline-offset:4px}
.article-body strong{color:#FFFFFF;font-weight:600}
.article-body table{width:100%;border-collapse:collapse;margin:26px 0;font-size:15px}
.article-body th,.article-body td{border:1px solid var(--line);padding:12px 14px;text-align:left;line-height:1.7}
.article-body th{background:var(--brand-08);color:var(--text-1);font-weight:600}
.article-body tbody tr:hover td{background:rgba(255,255,255,.03)}
.article-body code{
  font-family:ui-monospace,SFMono-Regular,Menlo,monospace;
  font-size:.88em;background:rgba(255,255,255,.08);
  padding:2px 7px;border-radius:6px;color:var(--brand);
}
.article-body figure{margin:28px 0}
.article-body figcaption{font-size:13px;color:var(--text-3);text-align:center;margin-top:10px}
.article-body hr{border:0;border-top:1px solid var(--line);margin:38px 0}

/* 空态 */
.empty-box{
  max-width:800px;margin:44px auto 0;min-height:200px;
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;
  text-align:center;padding:36px 24px;
  border:1px dashed var(--line);border-radius:var(--r-panel);
  background:var(--glass-1);
}
.empty-box i{font-size:40px;color:var(--brand);opacity:.85}
.empty-box p{font-size:14px;color:var(--text-2)}
.empty-box a{font-size:14px}

/* 标签行 */
.tag-row{
  max-width:800px;margin:44px auto 0;padding-top:22px;
  border-top:1px solid var(--line);
  display:flex;align-items:center;gap:10px;flex-wrap:wrap;
}
.tag-row .label{font-size:13px;color:var(--text-3);letter-spacing:.04em}
.tag{
  font-size:12.5px;padding:6px 13px;border-radius:var(--r-pill);
  border:1px solid var(--line);color:var(--text-2);background:var(--glass-1);
  transition:border-color .2s var(--ease),color .2s var(--ease),transform .2s var(--ease);
}
.tag:hover{border-color:var(--brand-35);color:var(--brand);text-decoration:none;transform:translateY(-2px)}

/* 通用小节标题 */
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:26px;flex-wrap:wrap}
.sec-head h2{font-size:28px;color:var(--text-1)}
.sec-head .cap{font-size:13.5px;color:var(--text-3);letter-spacing:.02em;margin-top:8px}

/* 相关推荐 */
.related{padding:80px 0 0}
.rel-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.rel-card{
  position:relative;display:flex;flex-direction:column;
  border-radius:var(--r-card);border:1px solid var(--line);
  background:var(--glass-1);backdrop-filter:blur(14px) saturate(120%);
  box-shadow:var(--sh-1);overflow:hidden;color:inherit;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.rel-card:hover{transform:translateY(-4px);border-color:var(--brand-35);box-shadow:var(--sh-2);text-decoration:none}
.rel-cover{position:relative;aspect-ratio:3/4;overflow:hidden;background:var(--bg-elev)}
.rel-cover img{width:100%;height:100%;object-fit:cover;transition:transform .22s var(--ease)}
.rel-card:hover .rel-cover img{transform:scale(1.04)}
.rel-cover::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(to top, rgba(8,7,15,.92), rgba(8,7,15,.05) 58%);
}
.rel-body{padding:16px 18px 18px;display:flex;flex-direction:column;gap:8px}
.rel-body h3{font-size:17px;color:var(--text-1);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.rel-body p{font-size:13.5px;color:var(--text-2);line-height:1.7;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.rel-tag{
  position:absolute;right:14px;bottom:14px;z-index:2;
  font-size:12px;padding:5px 11px;border-radius:var(--r-pill);
  background:rgba(8,7,15,.72);color:var(--brand);border:1px solid var(--brand-16);
}

/* 返回入口 */
.back-links{max-width:800px;margin:56px auto 0;display:flex;gap:14px;flex-wrap:wrap}

/* 底部 CTA */
.cta-band{padding:80px 0 96px}
.cta-inner{
  display:flex;align-items:center;justify-content:space-between;gap:26px;flex-wrap:wrap;
  padding:32px 34px;border-radius:var(--r-panel);
  border:1px solid var(--brand-16);
  background:linear-gradient(120deg, rgba(43,232,200,.10), rgba(122,92,255,.10) 60%, rgba(255,180,84,.08));
  backdrop-filter:blur(14px) saturate(120%);
  box-shadow:var(--sh-1);
}
.cta-inner h2{font-size:24px;color:var(--text-1);margin-bottom:8px}
.cta-inner p{font-size:14px;color:var(--text-2);max-width:560px}
.cta-actions{display:flex;align-items:center;gap:14px;flex-wrap:wrap}

/* 页脚 */
.footer{
  position:relative;border-top:1px solid rgba(43,232,200,.10);
  background:#07060D;padding:64px 0 28px;
}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:36px}
.footer h3{font-size:14px;color:var(--text-1);margin-bottom:16px;letter-spacing:.02em}
.footer ul{display:flex;flex-direction:column;gap:10px}
.footer ul a{font-size:13.5px;color:var(--text-2)}
.footer ul a:hover{color:var(--brand);text-decoration:none}
.footer .brand{margin-bottom:16px}
.footer-about{font-size:13.5px;color:var(--text-3);line-height:1.85;max-width:340px;margin-top:14px}
.footer-bottom{
  margin-top:44px;padding-top:22px;border-top:1px solid var(--line-soft);
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:var(--text-3);
}
.to-top{display:inline-flex;align-items:center;gap:8px;color:var(--text-2)}
.to-top:hover{color:var(--brand);text-decoration:none}

/* 响应式 */
@media (max-width:1279px) and (min-width:1024px){
  :root{--rail-w:88px}
  .rail{padding:20px 12px;align-items:center}
  .brand{justify-content:center}
  .brand-text{display:none}
  .rail-link{justify-content:center;padding:12px 0}
  .rail-link span{display:none}
  .rail-link::before{left:-6px}
  .rail-cta{padding:12px;width:48px}
  .rail-cta span{display:none}
  .rail-mini span{display:none}
  .article-head h1{font-size:34px}
}
@media (max-width:1023px){
  .rail{display:none}
  .topbar{display:flex}
  .page{margin-left:0}
  main{padding-top:88px}
  .article-head{padding:30px 24px 28px;margin-top:18px}
  .article-head h1{font-size:30px}
  .rel-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .cta-band{padding:64px 0 80px}
}
@media (max-width:767px){
  .container{padding:0 16px}
  body{font-size:15.5px}
  .topbar{height:60px}
  main{padding-top:80px}
  .article-head{padding:26px 18px 24px;border-radius:var(--r-card)}
  .article-head h1{font-size:26px}
  .article-lead{font-size:14.5px}
  .article-body{font-size:16px;margin-top:32px;line-height:1.9}
  .article-body h2{font-size:22px;margin:38px 0 16px}
  .article-body h3{font-size:17.5px}
  .sec-head h2{font-size:22px}
  .rel-grid{grid-template-columns:1fr}
  .cta-inner{padding:24px 20px}
  .cta-inner h2{font-size:20px}
  .cta-actions{width:100%}
  .cta-actions .btn{width:100%}
  .back-links .btn{width:100%}
  .footer{padding:52px 0 84px}
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .footer-bottom{margin-top:32px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition-duration:.01ms !important}
  html{scroll-behavior:auto}
}

/* roulang page: category1 */
:root{
  --bg-base:#08070F;
  --bg-alt:#0E0D1A;
  --bg-elev:#151327;
  --brand:#2BE8C8;
  --brand-08:rgba(43,232,200,.08);
  --brand-12:rgba(43,232,200,.12);
  --brand-35:rgba(43,232,200,.35);
  --accent:#FFB454;
  --violet:#7A5CFF;
  --text:#EDF1F7;
  --text-2:#9AA3B8;
  --text-3:#6B7387;
  --line:rgba(255,255,255,.07);
  --line-strong:rgba(255,255,255,.12);
  --glass-1:rgba(255,255,255,.055);
  --glass-2:rgba(255,255,255,.07);
  --glass-3:rgba(255,255,255,.10);
  --ok:#37D67A;
  --warn:#FFB454;
  --err:#FF5C7A;
  --r-card:18px;
  --r-panel:20px;
  --r-cover:22px;
  --r-btn:999px;
  --r-input:12px;
  --r-img:16px;
  --sh-1:0 8px 30px rgba(0,0,0,.45);
  --sh-2:0 16px 44px rgba(0,0,0,.55);
  --glow:0 0 0 1px rgba(43,232,200,.35),0 0 24px rgba(43,232,200,.22);
  --ease:cubic-bezier(.2,.7,.3,1);
  --rail:240px;
  --maxw:1240px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg-base);
  color:var(--text);
  font-family:"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Microsoft YaHei",sans-serif;
  font-size:16px;
  line-height:1.9;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-radius:var(--r-img)}
a{color:var(--brand);text-decoration:none;transition:color .2s var(--ease),opacity .2s var(--ease)}
a:hover{text-decoration:underline;text-underline-offset:4px}
a:focus-visible,button:focus-visible,input:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px}
button{font-family:inherit}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:-.01em;line-height:1.3}
p{margin:0 0 1em}
ul,ol{margin:0;padding:0;list-style:none}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 24px}
.num-font{font-family:Inter,Barlow,ui-monospace,monospace;font-variant-numeric:tabular-nums}

/* ---------- 左侧竖向导航 ---------- */
.rail-nav{
  position:fixed;top:0;left:0;bottom:0;width:var(--rail);
  display:flex;flex-direction:column;gap:8px;
  padding:24px 16px;
  background:linear-gradient(180deg,#100E1F 0%,#08070F 100%);
  border-right:1px solid var(--line);
  z-index:60;
}
.rail-brand{display:flex;align-items:center;gap:10px;padding:4px 6px 20px;border-bottom:1px solid var(--line);margin-bottom:14px}
.rail-brand:hover{text-decoration:none}
.brand{display:flex;align-items:center;gap:10px}
.brand:hover{text-decoration:none}
.brand-mark{
  flex:0 0 auto;width:38px;height:38px;border-radius:12px;
  display:grid;place-items:center;
  background:linear-gradient(135deg,rgba(43,232,200,.22),rgba(122,92,255,.28));
  border:1px solid rgba(43,232,200,.28);
  color:var(--brand);font-weight:700;font-size:14px;letter-spacing:.02em;
}
.brand-text{display:flex;flex-direction:column;line-height:1.2}
.main-word{font-size:19px;font-weight:700;color:var(--text);letter-spacing:-.01em}
.sub-word{font-size:8.5px;letter-spacing:.14em;color:var(--text-3);text-transform:none}
.rail-nav .rail-link{
  position:relative;display:flex;align-items:center;gap:12px;
  padding:12px 14px;border-radius:12px;
  color:var(--text-2);font-size:15px;
  transition:background .2s var(--ease),color .2s var(--ease),transform .2s var(--ease);
}
.rail-nav .rail-link i{font-size:16px;width:20px;text-align:center;color:inherit}
.rail-nav .rail-link:hover{background:rgba(255,255,255,.045);color:var(--text);text-decoration:none;transform:translateX(2px)}
.rail-nav .rail-link.active{color:var(--brand);background:var(--brand-08)}
.rail-nav .rail-link.active::before{
  content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:3px;height:22px;border-radius:2px;background:var(--brand);
}
.rail-foot{margin-top:auto;display:flex;flex-direction:column;gap:10px;padding-top:16px;border-top:1px solid var(--line)}
.rail-note{font-size:12px;color:var(--text-3);letter-spacing:.02em;line-height:1.7}

/* ---------- 移动端顶部导航 ---------- */
.mobile-top{
  display:none;position:fixed;top:0;left:0;right:0;height:64px;z-index:70;
  align-items:center;justify-content:space-between;padding:0 16px;
  background:rgba(14,13,26,.92);
  backdrop-filter:blur(14px) saturate(120%);
  border-bottom:1px solid rgba(43,232,200,.18);
}
.hamburger{
  width:44px;height:44px;border-radius:12px;border:1px solid var(--line-strong);
  background:var(--glass-2);color:var(--text);font-size:17px;cursor:pointer;
  transition:background .2s var(--ease),transform .2s var(--ease);
}
.hamburger:hover{background:var(--glass-3)}
.hamburger:active{transform:translateY(1px)}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:82vw;max-width:340px;z-index:90;
  background:linear-gradient(180deg,#12101F,#08070F);
  border-left:1px solid var(--line);
  padding:24px 20px;display:flex;flex-direction:column;gap:6px;
  transform:translateX(102%);transition:transform .26s var(--ease);
}
.drawer.open{transform:translateX(0)}
.drawer h2{font-size:13px;color:var(--text-3);letter-spacing:.14em;font-weight:500;margin:16px 0 6px}
.drawer .rail-link{padding:13px 14px;border-radius:12px;color:var(--text-2);display:flex;gap:12px;align-items:center;font-size:15px}
.drawer .rail-link:hover{background:rgba(255,255,255,.05);color:var(--text);text-decoration:none}
.drawer .rail-link.active{color:var(--brand);background:var(--brand-08)}
.drawer-close{
  align-self:flex-end;width:40px;height:40px;border-radius:12px;
  border:1px solid var(--line-strong);background:var(--glass-2);color:var(--text);cursor:pointer;font-size:16px;
}
.overlay{
  position:fixed;inset:0;background:rgba(4,3,9,.66);backdrop-filter:blur(2px);
  z-index:85;opacity:0;pointer-events:none;transition:opacity .24s var(--ease);
}
.overlay.show{opacity:1;pointer-events:auto}

/* ---------- 主体布局 ---------- */
.site-main{margin-left:var(--rail);min-height:100vh}
.footer{margin-left:var(--rail)}

/* ---------- 面包屑 ---------- */
.crumb{padding:28px 0 0}
.crumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-3)}
.crumb li{display:flex;align-items:center;gap:8px}
.crumb li+li::before{content:"/";color:var(--text-3);opacity:.6}
.crumb a{color:var(--text-2)}
.crumb a:hover{color:var(--brand)}
.crumb [aria-current]{color:var(--brand)}

/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line);padding:44px 0 64px}
.hero::before{
  content:"";position:absolute;inset:0;
  background:url(/assets/images/backpic/back-1.webp) center/cover no-repeat;
  opacity:.45;
}
.hero::after{
  content:"";position:absolute;inset:0;
  background:
    repeating-linear-gradient(115deg,rgba(255,255,255,.030) 0 1px,transparent 1px 9px),
    linear-gradient(180deg,rgba(8,7,15,.90) 0%,rgba(8,7,15,.40) 52%,rgba(8,7,15,.96) 100%);
}
.hero .container{position:relative;z-index:2}
.hero-grid{display:grid;grid-template-columns:6fr 5fr;gap:48px;align-items:center}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:.08em;color:var(--brand);
  background:var(--brand-12);border:1px solid rgba(43,232,200,.24);
  padding:6px 14px;border-radius:var(--r-btn);
}
.eyebrow i{font-size:11px}
.hero h1{
  font-size:44px;line-height:1.22;margin:20px 0 16px;max-width:15em;
  background:linear-gradient(180deg,#FFFFFF 20%,#C9D2E4 100%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero-sub{font-size:16px;color:var(--text-2);max-width:34em;line-height:1.9;margin-bottom:26px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;align-items:center}
.hero-stats{display:flex;flex-wrap:wrap;gap:28px;margin-top:38px;padding-top:24px;border-top:1px solid var(--line)}
.stat{min-width:96px}
.stat .stat-num{font-size:24px;font-weight:700;color:var(--brand);letter-spacing:-.02em}
.stat .stat-label{font-size:13px;color:var(--text-3);letter-spacing:.02em}

/* 竖屏手机框 */
.hero-visual{display:flex;justify-content:center}
.phone-frame{
  position:relative;width:min(300px,86%);aspect-ratio:9/16;border-radius:28px;
  background:var(--glass-2);border:1px solid var(--line-strong);
  box-shadow:var(--sh-2);overflow:hidden;
}
.phone-frame img{width:100%;height:100%;object-fit:cover;border-radius:0;opacity:.85}
.phone-frame::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(8,7,15,.55),rgba(8,7,15,.10) 40%,rgba(8,7,15,.85));
}
.phone-bar{
  position:absolute;left:14px;right:14px;height:8px;border-radius:6px;
  background:rgba(255,255,255,.16);z-index:3;
}
.phone-bar.top{top:14px}
.phone-bar.bottom{bottom:16px;background:rgba(43,232,200,.28)}
.phone-play{
  position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);
  width:64px;height:64px;border-radius:50%;z-index:3;
  display:grid;place-items:center;
  background:rgba(255,255,255,.10);border:1px solid rgba(43,232,200,.35);
  backdrop-filter:blur(10px);color:var(--brand);font-size:18px;
}
.phone-badge{
  position:absolute;right:14px;bottom:34px;z-index:3;
  font-size:12px;color:var(--text);padding:4px 10px;border-radius:var(--r-btn);
  background:rgba(8,7,15,.72);border:1px solid var(--line-strong);
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 28px;border-radius:var(--r-btn);border:1px solid transparent;
  font-size:15px;font-weight:600;cursor:pointer;letter-spacing:.02em;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),background .2s var(--ease),color .2s var(--ease),filter .2s var(--ease);
}
.btn:hover{text-decoration:none;transform:translateY(-2px)}
.btn:active{transform:translateY(1px)}
.btn-primary{background:linear-gradient(135deg,#FFC470,#FFB454);color:#08070F;box-shadow:0 0 0 1px rgba(255,180,84,.35),0 0 24px rgba(255,180,84,.22)}
.btn-primary:hover{filter:brightness(1.08);box-shadow:0 0 0 1px rgba(255,180,84,.5),0 0 30px rgba(255,180,84,.34)}
.btn-ghost{background:transparent;border-color:rgba(43,232,200,.4);color:var(--brand)}
.btn-ghost:hover{background:var(--brand-12)}
.btn-block{width:100%}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed;box-shadow:none;transform:none}
.btn-text{color:var(--brand);font-weight:600;text-decoration:underline;text-underline-offset:4px;background:none;border:none;padding:0;cursor:pointer;font-size:14px}

/* ---------- 通用板块 ---------- */
.section{padding:88px 0}
.section.alt{background:var(--bg-alt);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:36px}
.sec-title{position:relative;font-size:30px;padding-left:16px}
.sec-title::before{
  content:"";position:absolute;left:0;top:.18em;bottom:.18em;width:3px;border-radius:2px;
  background:linear-gradient(180deg,var(--brand),var(--violet));
}
.sec-title::after{
  content:"";position:absolute;left:-3px;top:-8px;width:6px;height:6px;border-radius:50%;background:var(--brand);
}
.sec-sub{margin-top:8px;font-size:14px;color:var(--text-3);letter-spacing:.03em;padding-left:16px}

/* ---------- 横滑轨道 ---------- */
.scroll-wrap{position:relative}
.scroll-wrap::before,.scroll-wrap::after{
  content:"";position:absolute;top:0;bottom:20px;width:24px;z-index:3;pointer-events:none;
}
.scroll-wrap::before{left:0;background:linear-gradient(90deg,var(--bg-base),transparent)}
.scroll-wrap::after{right:0;background:linear-gradient(270deg,var(--bg-base),transparent)}
.section.alt .scroll-wrap::before{background:linear-gradient(90deg,var(--bg-alt),transparent)}
.section.alt .scroll-wrap::after{background:linear-gradient(270deg,var(--bg-alt),transparent)}
.rail-scroll{
  display:flex;gap:16px;overflow-x:auto;scroll-snap-type:x mandatory;
  padding:4px 0 22px;scrollbar-width:none;-ms-overflow-style:none;
}
.rail-scroll::-webkit-scrollbar{display:none}
.clip-card{
  flex:0 0 272px;scroll-snap-align:start;
  background:var(--glass-1);border:1px solid var(--line-strong);border-radius:var(--r-card);
  overflow:hidden;box-shadow:var(--sh-1);
  transition:transform .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.clip-card:hover{transform:translateY(-4px);border-color:var(--brand-35);box-shadow:var(--sh-2)}
.clip-cover{position:relative;aspect-ratio:9/16;overflow:hidden;background:var(--bg-elev)}
.clip-cover img{width:100%;height:100%;object-fit:cover;border-radius:0;transition:transform .22s var(--ease)}
.clip-card:hover .clip-cover img{transform:scale(1.04)}
.clip-cover::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(8,7,15,.25),rgba(8,7,15,.85))}
.clip-badge{
  position:absolute;top:12px;right:12px;z-index:2;
  font-size:12px;padding:4px 10px;border-radius:var(--r-btn);
  background:rgba(8,7,15,.7);border:1px solid rgba(43,232,200,.3);color:var(--brand);
}
.clip-body{position:absolute;left:0;right:0;bottom:0;padding:14px;z-index:2}
.clip-body h3{font-size:15px;line-height:1.5;margin-bottom:6px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.clip-meta{display:flex;align-items:center;justify-content:space-between;font-size:12px;color:var(--text-3)}
.clip-card.is-static .clip-cover{aspect-ratio:9/16}
.clip-card > .clip-inner{position:relative}

/* ---------- 粘性锚点条 ---------- */
.toc-bar{
  position:sticky;top:0;z-index:50;
  background:rgba(8,7,15,.88);backdrop-filter:blur(12px) saturate(120%);
  border-bottom:1px solid var(--line);
}
.toc-inner{display:flex;gap:8px;overflow-x:auto;padding:12px 0;scrollbar-width:none}
.toc-inner::-webkit-scrollbar{display:none}
.toc-link{
  flex:0 0 auto;font-size:13px;color:var(--text-2);padding:7px 15px;border-radius:var(--r-btn);
  border:1px solid var(--line-strong);background:var(--glass-1);
  transition:color .2s var(--ease),background .2s var(--ease),border-color .2s var(--ease);
}
.toc-link:hover,.toc-link.active{color:var(--brand);border-color:var(--brand-35);background:var(--brand-12);text-decoration:none}

/* ---------- 错位双列 ---------- */
.split{display:grid;grid-template-columns:7fr 5fr;gap:24px}
.split.rev{grid-template-columns:5fr 7fr}
.split-card{
  background:var(--glass-2);border:1px solid var(--line-strong);border-radius:var(--r-panel);
  padding:28px;box-shadow:var(--sh-1);
  transition:border-color .22s var(--ease),transform .22s var(--ease);
}
.split-card:hover{border-color:var(--brand-35);transform:translateY(-4px)}
.split-card h3{font-size:19px;margin-bottom:12px;color:var(--text)}
.split-card p{font-size:15px;color:var(--text-2);line-height:1.9;margin-bottom:14px}
.split-card .cover-img{border-radius:var(--r-img);border:1px solid rgba(255,255,255,.08);margin-bottom:18px;aspect-ratio:16/10;object-fit:cover;width:100%}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:6px}
.badge{
  font-size:12px;padding:4px 11px;border-radius:var(--r-btn);letter-spacing:.03em;
  background:var(--brand-12);color:var(--brand);border:1px solid rgba(43,232,200,.18);
}
.badge.accent{background:rgba(255,180,84,.14);color:var(--accent);border-color:rgba(255,180,84,.28)}
.badge.muted{background:rgba(255,255,255,.06);color:var(--text-2);border-color:var(--line-strong)}
.badge.ok{background:rgba(55,214,122,.14);color:var(--ok);border-color:rgba(55,214,122,.28)}

/* ---------- 编号清单 ---------- */
.num-list{border-top:1px solid var(--line)}
.num-item{
  display:grid;grid-template-columns:72px 1fr auto;gap:20px;align-items:center;
  padding:22px 16px;border-bottom:1px solid var(--line);
  transition:background .22s var(--ease),transform .22s var(--ease);
}
.num-item:hover{background:rgba(255,255,255,.035);transform:translateX(4px)}
.num-idx{
  font-size:32px;font-weight:700;line-height:1;
  color:transparent;-webkit-text-stroke:1px var(--brand);letter-spacing:.02em;
  transition:color .22s var(--ease)
}
.num-item:hover .num-idx{color:var(--brand);-webkit-text-stroke:1px transparent}
.num-item h3{font-size:17px;margin-bottom:4px}
.num-item p{font-size:14px;color:var(--text-2);margin:0;line-height:1.8}
.num-thumb{width:96px;height:96px;border-radius:14px;object-fit:cover;border:1px solid rgba(255,255,255,.08);transition:transform .22s var(--ease)}
.num-item:hover .num-thumb{transform:scale(1.04)}
.num-arrow{width:36px;height:36px;border-radius:50%;display:grid;place-items:center;border:1px solid var(--line-strong);color:var(--text-2)}

/* ---------- 竖向分组 ---------- */
.groups{display:flex;flex-direction:column;gap:44px}
.group{border-left:1px solid var(--line);padding-left:26px;position:relative}
.group::before{content:"";position:absolute;left:-4px;top:12px;width:7px;height:7px;border-radius:50%;background:var(--brand);box-shadow:0 0 12px rgba(43,232,200,.5)}
.group h2{font-size:22px;margin-bottom:8px}
.group-hint{font-size:14px;color:var(--text-3);margin-bottom:18px;letter-spacing:.02em}
.mini-cards{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.mini-card{
  background:var(--glass-1);border:1px solid var(--line-strong);border-radius:var(--r-card);
  padding:20px;box-shadow:var(--sh-1);
  transition:transform .22s var(--ease),border-color .22s var(--ease);
}
.mini-card:hover{transform:translateY(-4px);border-color:var(--brand-35)}
.mini-card h3{font-size:16px;margin-bottom:8px}
.mini-card p{font-size:14px;color:var(--text-2);margin:0;line-height:1.85}

/* ---------- 提示条 ---------- */
.note-bar{
  display:flex;gap:16px;align-items:flex-start;
  background:linear-gradient(120deg,rgba(255,180,84,.10),rgba(255,255,255,.04));
  border:1px solid rgba(255,180,84,.28);border-radius:var(--r-panel);
  padding:20px 24px;
}
.note-bar i{color:var(--accent);font-size:18px;margin-top:4px}
.note-bar strong{display:block;font-size:16px;margin-bottom:4px;color:var(--text)}
.note-bar span{font-size:14px;color:var(--text-2);line-height:1.85}

/* ---------- FAQ ---------- */
.faq-list{display:flex;flex-direction:column;gap:14px;max-width:900px}
.faq-item{background:var(--glass-1);border:1px solid var(--line-strong);border-radius:var(--r-card);box-shadow:var(--sh-1);overflow:hidden;transition:border-color .22s var(--ease)}
.faq-item.open{border-color:var(--brand-35)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 22px;background:none;border:none;cursor:pointer;text-align:left;
  color:var(--text);font-size:17px;font-weight:700;letter-spacing:-.01em;
}
.faq-q:hover{color:var(--brand)}
.faq-icon{
  flex:0 0 auto;width:28px;height:28px;border-radius:50%;display:grid;place-items:center;
  border:1px solid var(--line-strong);color:var(--brand);font-size:14px;
  transition:transform .22s var(--ease),background .22s var(--ease);
}
.faq-item.open .faq-icon{transform:rotate(45deg);background:var(--brand-12)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .26s var(--ease)}
.faq-a p{padding:0 22px 22px;font-size:15px;color:var(--text-2);line-height:1.9;margin:0}

/* ---------- CTA ---------- */
.cta-band{
  margin:0 auto;max-width:var(--maxw);
  background:var(--glass-3);border:1px solid rgba(43,232,200,.24);border-radius:var(--r-panel);
  padding:32px;display:flex;align-items:center;justify-content:space-between;gap:24px;
  box-shadow:var(--sh-1);
}
.cta-band h2{font-size:24px;margin-bottom:6px}
.cta-band p{margin:0;font-size:15px;color:var(--text-2)}
.cta-actions{display:flex;align-items:center;gap:18px;flex-wrap:wrap}

/* ---------- 页脚 ---------- */
.footer{
  background:#060510;border-top:1px solid rgba(43,232,200,.10);
  padding:64px 0 24px;margin-top:88px;
}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px}
.footer h3{font-size:15px;margin-bottom:16px;color:var(--text)}
.footer ul li{margin-bottom:10px}
.footer ul a{font-size:14px;color:var(--text-2)}
.footer ul a:hover{color:var(--brand)}
.footer-about{font-size:14px;color:var(--text-3);line-height:1.85;margin-top:16px;max-width:32em}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  margin-top:48px;padding-top:22px;border-top:1px solid var(--line);
  font-size:13px;color:var(--text-3);
}
.to-top{color:var(--text-2);font-size:13px}
.to-top:hover{color:var(--brand)}

/* ---------- 表单（登录面板） ---------- */
.login-panel{max-width:560px;margin:0 auto;background:var(--glass-3);border:1px solid var(--line-strong);border-radius:var(--r-panel);padding:32px;box-shadow:var(--sh-2)}
.field{margin-bottom:20px}
.field label{display:block;font-size:13px;color:var(--text-2);margin-bottom:8px;letter-spacing:.02em}
.field input{
  width:100%;height:48px;padding:0 14px;border-radius:var(--r-input);
  background:rgba(255,255,255,.04);border:1px solid var(--line-strong);
  color:var(--text);font-size:15px;transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.field input::placeholder{color:var(--text-3)}
.field input:focus{border-color:var(--brand);box-shadow:0 0 0 4px rgba(43,232,200,.12);outline:none}
.field.error input{border-color:var(--err)}
.field .field-msg{display:none;font-size:12px;color:var(--err);margin-top:8px}
.field.error .field-msg{display:block}
.field .field-msg i{margin-right:6px}
.field.success input{border-color:var(--ok)}
.field.success .field-msg{display:block;color:var(--ok)}
.check-row{display:flex;align-items:center;gap:10px;font-size:14px;color:var(--text-2);margin-bottom:24px}
.check-row input{width:16px;height:16px;accent-color:var(--brand)}
.form-foot{margin-top:18px;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;font-size:13px}

/* ---------- 骨架屏 ---------- */
.skeleton{position:relative;overflow:hidden;background:var(--glass-1);border-radius:var(--r-img)}
.skeleton::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(100deg,transparent 20%,rgba(255,255,255,.10) 50%,transparent 80%);
  animation:sheen 1.4s linear infinite;opacity:.6;
}
@keyframes sheen{0%{transform:translateX(-100%)}100%{transform:translateX(100%)}}

/* ---------- 响应式 ---------- */
@media (min-width:1024px) and (max-width:1279px){
  :root{--rail:88px}
  .rail-nav{padding:24px 12px;align-items:center}
  .rail-brand{justify-content:center;padding-bottom:16px}
  .rail-nav .rail-link{justify-content:center;padding:14px 0;width:100%;gap:0}
  .rail-nav .rail-link span{
    position:absolute;left:calc(100% + 10px);white-space:nowrap;
    background:var(--bg-elev);border:1px solid var(--line-strong);
    padding:6px 12px;border-radius:10px;font-size:13px;color:var(--text);
    opacity:0;pointer-events:none;transition:opacity .18s var(--ease);
  }
  .rail-nav .rail-link:hover span{opacity:1}
  .rail-brand .brand-text,.rail-foot{display:none}
  .hero h1{font-size:36px}
  .hero-grid{grid-template-columns:7fr 5fr;gap:32px}
  .sec-title{font-size:26px}
}
@media (max-width:1023px){
  .rail-nav{display:none}
  .mobile-top{display:flex}
  .site-main,.footer{margin-left:0}
  .site-main{padding-top:64px}
  .toc-bar{top:64px}
  .hero{padding:36px 0 52px}
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .hero h1{font-size:36px;max-width:none}
  .hero-visual{order:2}
  .phone-frame{width:min(300px,68vw)}
  .section{padding:72px 0}
  .split,.split.rev{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .cta-band{flex-direction:column;align-items:flex-start}
  .footer{padding-bottom:96px}
}
@media (max-width:767px){
  .container{padding:0 16px}
  .hero h1{font-size:28px}
  .hero-sub{font-size:15px}
  .hero-stats{gap:20px}
  .sec-title{font-size:22px}
  .sec-head{flex-direction:column;align-items:flex-start}
  .section{padding:56px 0}
  .clip-card{flex:0 0 216px}
  .mini-cards{grid-template-columns:1fr}
  .num-item{grid-template-columns:48px 1fr;gap:14px;padding:18px 10px}
  .num-idx{font-size:24px}
  .num-thumb,.num-arrow{display:none}
  .footer-grid{grid-template-columns:1fr}
  .cta-band{padding:24px}
  .cta-band h2{font-size:20px}
  .btn{width:100%}
  .cta-actions{width:100%}
  .login-panel{padding:24px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important}
}

/* roulang page: category2 */
:root{
  --bg-base:#08070F;
  --bg-alt:#0E0D1A;
  --bg-elev:#151327;
  --brand:#2BE8C8;
  --accent:#FFB454;
  --violet:#7A5CFF;
  --text:#EDF1F7;
  --text-2:#9AA3B8;
  --text-3:#6B7387;
  --ok:#37D67A;
  --warn:#FFB454;
  --err:#FF5C7A;
  --info:#2BE8C8;
  --line:rgba(255,255,255,0.08);
  --line-soft:rgba(255,255,255,0.07);
  --glass-1:rgba(255,255,255,0.055);
  --glass-2:rgba(255,255,255,0.07);
  --glass-3:rgba(255,255,255,0.10);
  --stroke-brand:rgba(43,232,200,0.16);
  --stroke-brand-strong:rgba(43,232,200,0.40);
  --r-card:18px;
  --r-panel:20px;
  --r-cover:22px;
  --r-input:12px;
  --r-img:16px;
  --sh-1:0 8px 30px rgba(0,0,0,0.45);
  --sh-2:0 16px 44px rgba(0,0,0,0.55);
  --glow:0 0 0 1px rgba(43,232,200,0.35), 0 0 24px rgba(43,232,200,0.22);
  --rail:240px;
  --sec-pad:48px;
  --ease:cubic-bezier(.2,.7,.3,1);
  --font-cn:"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Microsoft YaHei",sans-serif;
  --font-num:"Inter","Barlow",system-ui,sans-serif;
  --font-mono:ui-monospace,"SFMono-Regular","Menlo",monospace;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg-base);
  color:var(--text);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.75;
  letter-spacing:0.01em;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-radius:var(--r-img);}
a{color:var(--brand);text-decoration:none;transition:color .2s var(--ease),opacity .2s var(--ease);}
a:hover{text-decoration:underline;text-underline-offset:4px;filter:brightness(1.08);}
button{font:inherit;color:inherit;border:0;background:none;cursor:pointer;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3{margin:0;font-weight:700;letter-spacing:-0.01em;line-height:1.3;}
p{margin:0 0 .9em;}
p:last-child{margin-bottom:0;}
strong{font-weight:700;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px;}

/* ---------- 布局骨架 ---------- */
.layout{padding-left:var(--rail);}
.container{max-width:1240px;margin:0 auto;padding:0 24px;width:100%;}
.section{padding:var(--sec-pad) 0;}
.section-head{margin-bottom:32px;}
.section-head h2{font-size:30px;padding-left:14px;position:relative;}
.section-head h2::before{
  content:"";position:absolute;left:0;top:6px;bottom:6px;width:3px;border-radius:2px;
  background:linear-gradient(180deg,var(--brand),var(--violet));
}
.section-head .cap{
  margin-top:10px;padding-left:14px;font-size:13.5px;color:var(--text-2);letter-spacing:0.02em;
}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:0.14em;text-transform:uppercase;
  color:var(--brand);font-family:var(--font-num);
}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--brand);box-shadow:0 0 10px var(--brand);}

/* ---------- 左侧竖向导航 ---------- */
.rail{
  position:fixed;top:0;left:0;bottom:0;width:var(--rail);z-index:60;
  display:flex;flex-direction:column;gap:24px;padding:24px 16px;
  background:linear-gradient(180deg,#0B0A16 0%,#08070F 100%);
  border-right:1px solid var(--line);
}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;}
.brand:hover{text-decoration:none;}
.brand-mark{
  width:38px;height:38px;flex:0 0 38px;border-radius:12px;
  background:linear-gradient(135deg,var(--brand),var(--violet));
  color:#08070F;font-family:var(--font-num);font-weight:800;font-size:15px;
  display:grid;place-items:center;letter-spacing:-0.02em;
  box-shadow:0 6px 18px rgba(43,232,200,0.22);
}
.brand-text{display:flex;flex-direction:column;line-height:1.2;}
.main-word{font-size:17px;font-weight:700;color:var(--text);letter-spacing:-0.01em;}
.sub-word{font-size:8px;letter-spacing:0.08em;color:var(--text-3);font-family:var(--font-num);}
.rail-nav{display:flex;flex-direction:column;gap:4px;margin-top:8px;}
.rail-link{
  position:relative;display:flex;align-items:center;gap:12px;
  padding:11px 12px;border-radius:12px;
  color:var(--text-2);font-size:14.5px;text-decoration:none;
  transition:background .22s var(--ease),color .22s var(--ease),transform .22s var(--ease);
}
.rail-link i{width:20px;text-align:center;font-size:15px;}
.rail-link:hover{background:rgba(255,255,255,0.05);color:var(--text);text-decoration:none;transform:translateX(2px);}
.rail-link.active{color:var(--brand);background:rgba(43,232,200,0.08);}
.rail-link.active::before{
  content:"";position:absolute;left:-16px;top:10px;bottom:10px;width:3px;border-radius:0 3px 3px 0;
  background:var(--brand);box-shadow:0 0 12px rgba(43,232,200,0.6);
}
.rail-foot{margin-top:auto;display:flex;flex-direction:column;gap:10px;}
.rail-note{font-size:12.5px;color:var(--text-3);line-height:1.6;}

/* ---------- 顶部移动导航 ---------- */
.topbar{
  display:none;position:sticky;top:0;z-index:80;height:64px;
  align-items:center;justify-content:space-between;
  padding:0 16px;
  background:rgba(8,7,15,0.86);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  border-bottom:1px solid rgba(43,232,200,0.18);
}
.topbar .main-word{font-size:16px;}
.burger{
  width:42px;height:42px;border-radius:12px;display:grid;place-items:center;
  background:var(--glass-2);border:1px solid var(--line);color:var(--text);font-size:17px;
  transition:background .22s var(--ease),border-color .22s var(--ease);
}
.burger:hover{background:rgba(43,232,200,0.12);border-color:var(--stroke-brand-strong);}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:82vw;max-width:360px;z-index:120;
  background:#0B0A16;border-left:1px solid var(--line);
  padding:24px 20px;display:flex;flex-direction:column;gap:20px;
  transform:translateX(102%);transition:transform .26s var(--ease);
  overflow-y:auto;
}
.drawer.open{transform:translateX(0);}
.drawer-mask{
  position:fixed;inset:0;background:rgba(4,3,9,0.66);backdrop-filter:blur(2px);z-index:110;
  opacity:0;visibility:hidden;transition:opacity .26s var(--ease),visibility .26s var(--ease);
}
.drawer-mask.open{opacity:1;visibility:visible;}
.drawer-head{display:flex;align-items:center;justify-content:space-between;}
.drawer .rail-link{padding:13px 12px;}
.drawer .rail-link.active::before{left:-20px;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 28px;border-radius:999px;font-size:15px;font-weight:600;
  text-decoration:none;cursor:pointer;border:1px solid transparent;line-height:1;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),background .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease);
}
.btn:hover{text-decoration:none;}
.btn-primary{
  background:linear-gradient(135deg,var(--accent),#FFCD85);
  color:#08070F;box-shadow:0 0 0 1px rgba(255,180,84,0.35),0 0 20px rgba(255,180,84,0.22);
}
.btn-primary:hover{filter:brightness(1.08);transform:translateY(-2px);box-shadow:0 0 0 1px rgba(255,180,84,0.5),0 0 30px rgba(255,180,84,0.32);}
.btn-primary:active{transform:translateY(1px);box-shadow:0 0 0 1px rgba(255,180,84,0.4);}
.btn-ghost{
  background:transparent;border-color:var(--stroke-brand-strong);color:var(--brand);
}
.btn-ghost:hover{background:rgba(43,232,200,0.10);transform:translateY(-2px);}
.btn-ghost:active{transform:translateY(1px);}
.btn-block{width:100%;}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed;box-shadow:none;transform:none;}
.btn-text{
  color:var(--brand);font-size:14px;padding:4px 0;text-decoration:none;
  display:inline-flex;align-items:center;gap:6px;
}
.btn-text:hover{text-decoration:underline;text-underline-offset:4px;}

/* ---------- 徽章 / 标签 ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:999px;font-size:12px;letter-spacing:0.02em;
  background:rgba(43,232,200,0.12);color:var(--brand);border:1px solid var(--stroke-brand);
}
.badge-accent{background:rgba(255,180,84,0.14);color:var(--accent);border-color:rgba(255,180,84,0.32);}
.badge-ok{background:rgba(55,214,122,0.14);color:var(--ok);border-color:rgba(55,214,122,0.32);}
.badge-violet{background:rgba(122,92,255,0.16);color:#B7A6FF;border-color:rgba(122,92,255,0.34);}

/* ---------- Hero ---------- */
.hero{
  position:relative;overflow:hidden;
  padding:64px 0 56px;
  background-image:
    linear-gradient(180deg,rgba(8,7,15,0.92) 0%,rgba(8,7,15,0.72) 45%,rgba(8,7,15,0.96) 100%),
    url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;
}
.hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:repeating-linear-gradient(115deg,rgba(255,255,255,0.035) 0 1px,transparent 1px 9px);
  opacity:.6;
}
.hero-grid{
  position:relative;z-index:2;
  display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center;
}
.hero h1{font-size:44px;margin:16px 0 14px;}
.hero-sub{
  font-size:19px;color:var(--brand);font-weight:600;margin-bottom:12px;letter-spacing:0.01em;
}
.hero-desc{color:var(--text-2);max-width:560px;font-size:16.5px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:26px;}
.stat-row{display:flex;flex-wrap:wrap;gap:32px;margin-top:34px;padding-top:24px;border-top:1px dashed var(--line);}
.stat-row li{display:flex;flex-direction:column;gap:2px;}
.stat-row strong{font-family:var(--font-num);font-size:26px;color:var(--text);letter-spacing:-0.02em;}
.stat-row span{font-size:13px;color:var(--text-3);letter-spacing:0.04em;}
.hero-media{position:relative;}
.hero-media img{
  width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--r-cover);
  border:1px solid var(--line);
  box-shadow:var(--sh-2);
}
.media-card{
  position:absolute;left:-18px;bottom:-18px;
  display:flex;align-items:center;gap:12px;
  padding:14px 18px;border-radius:16px;
  background:rgba(21,19,39,0.9);
  border:1px solid var(--stroke-brand);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  box-shadow:var(--sh-1);
}
.media-card .dot{width:8px;height:8px;border-radius:50%;background:var(--ok);box-shadow:0 0 10px var(--ok);}
.media-card strong{display:block;font-size:13.5px;}
.media-card p{margin:0;font-size:12.5px;color:var(--text-2);}

/* ---------- 锚点导航 ---------- */
.anchor-nav{
  position:sticky;top:0;z-index:50;
  background:rgba(8,7,15,0.82);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  border-bottom:1px solid var(--line);
}
.anchor-nav .container{display:flex;gap:10px;overflow-x:auto;padding-top:12px;padding-bottom:12px;scrollbar-width:none;}
.anchor-nav .container::-webkit-scrollbar{display:none;}
.anchor-nav a{
  flex:0 0 auto;padding:8px 16px;border-radius:999px;font-size:13.5px;color:var(--text-2);
  border:1px solid var(--line);background:var(--glass-1);text-decoration:none;
  transition:color .22s var(--ease),border-color .22s var(--ease),background .22s var(--ease);
}
.anchor-nav a:hover{color:var(--brand);border-color:var(--stroke-brand-strong);background:rgba(43,232,200,0.08);text-decoration:none;}

/* ---------- 分组区 ---------- */
.group{margin-bottom:40px;}
.group:last-child{margin-bottom:0;}
.group-title{
  display:flex;align-items:baseline;gap:14px;flex-wrap:wrap;
  padding-bottom:14px;margin-bottom:22px;border-bottom:1px solid var(--line-soft);
}
.group-title h3{font-size:19px;}
.group-title .num{
  font-family:var(--font-mono);font-size:13px;color:var(--accent);letter-spacing:0.06em;
  padding:2px 10px;border-radius:999px;border:1px solid rgba(255,180,84,0.32);background:rgba(255,180,84,0.08);
}
.group-title .hint{font-size:13px;color:var(--text-3);margin-left:auto;}
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.card{
  background:var(--glass-1);
  border:1px solid var(--stroke-brand);
  border-radius:var(--r-card);
  padding:24px;
  box-shadow:var(--sh-1);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  transition:transform .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.card:hover{transform:translateY(-4px);border-color:rgba(43,232,200,0.35);box-shadow:var(--sh-2);}
.card h4{margin:0 0 10px;font-size:16.5px;font-weight:700;letter-spacing:-0.01em;}
.card p{font-size:14.5px;color:var(--text-2);line-height:1.85;}
.card .icon{
  width:40px;height:40px;border-radius:12px;display:grid;place-items:center;margin-bottom:16px;
  background:rgba(43,232,200,0.10);border:1px solid var(--stroke-brand);color:var(--brand);font-size:16px;
}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px;}
.tag{
  font-size:12px;padding:4px 10px;border-radius:999px;
  background:rgba(255,255,255,0.06);color:var(--text-2);border:1px solid var(--line);
}

/* ---------- 版本对照 ---------- */
.version-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.version-card{
  background:var(--glass-2);
  border:1px solid var(--line);
  border-radius:var(--r-cover);
  overflow:hidden;
  box-shadow:var(--sh-1);
  transition:transform .22s var(--ease),border-color .22s var(--ease);
}
.version-card:hover{transform:translateY(-4px);border-color:rgba(43,232,200,0.32);}
.version-card img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:0;border-bottom:1px solid var(--line);}
.version-body{padding:22px;}
.version-body h3{font-size:18px;margin-bottom:8px;}
.version-body p{font-size:14.5px;color:var(--text-2);}
.spec-list{margin-top:16px;display:flex;flex-direction:column;gap:10px;}
.spec-list li{display:flex;justify-content:space-between;gap:12px;font-size:13.5px;padding-bottom:8px;border-bottom:1px dashed var(--line-soft);}
.spec-list li:last-child{border-bottom:0;padding-bottom:0;}
.spec-list span:first-child{color:var(--text-3);}
.spec-list span:last-child{color:var(--text);font-weight:600;}

/* ---------- 适用场景 ---------- */
.scene-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;}
.scene{
  display:flex;gap:16px;align-items:flex-start;
  padding:22px;border-radius:var(--r-card);
  background:var(--glass-1);border:1px solid var(--line);
  transition:background .22s var(--ease),transform .22s var(--ease),border-color .22s var(--ease);
}
.scene:hover{background:rgba(255,255,255,0.075);transform:translateX(4px);border-color:var(--stroke-brand);}
.scene .idx{
  font-family:var(--font-num);font-size:20px;font-weight:700;color:var(--brand);
  min-width:44px;letter-spacing:-0.02em;
}
.scene h3{font-size:16.5px;margin-bottom:6px;}
.scene p{font-size:14.5px;color:var(--text-2);}

/* ---------- 步骤 ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;counter-reset:step;}
.step{
  position:relative;padding:26px 22px;border-radius:var(--r-card);
  background:linear-gradient(180deg,rgba(21,19,39,0.85),rgba(14,13,26,0.85));
  border:1px solid var(--line);
}
.step::before{
  counter-increment:step;content:"0" counter(step);
  font-family:var(--font-mono);font-size:13px;color:var(--accent);letter-spacing:0.08em;
  display:block;margin-bottom:14px;
}
.step h3{font-size:16px;margin-bottom:8px;}
.step p{font-size:14px;color:var(--text-2);}
.step::after{
  content:"";position:absolute;top:34px;right:-19px;width:18px;height:1px;
  background:linear-gradient(90deg,var(--brand),transparent);opacity:.55;
}
.step:last-child::after{display:none;}

/* ---------- FAQ ---------- */
.faq-list{display:flex;flex-direction:column;gap:12px;}
.faq-item{
  background:var(--glass-1);border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;transition:border-color .22s var(--ease),background .22s var(--ease);
}
.faq-item:hover{border-color:var(--stroke-brand);}
.faq-item.open{border-color:var(--stroke-brand-strong);background:rgba(43,232,200,0.06);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 22px;text-align:left;font-size:17px;font-weight:700;color:var(--text);
  letter-spacing:-0.01em;
}
.faq-q .ico{
  flex:0 0 26px;width:26px;height:26px;border-radius:50%;
  display:grid;place-items:center;font-size:13px;
  background:rgba(43,232,200,0.12);color:var(--brand);border:1px solid var(--stroke-brand);
  transition:transform .22s var(--ease),background .22s var(--ease);
}
.faq-item.open .faq-q .ico{transform:rotate(45deg);background:rgba(255,180,84,0.16);color:var(--accent);border-color:rgba(255,180,84,0.32);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .28s var(--ease);}
.faq-a p{padding:0 22px 20px;font-size:15px;line-height:1.9;color:var(--text-2);}

/* ---------- CTA ---------- */
.cta-band{
  display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap;
  padding:32px;border-radius:var(--r-panel);
  background:linear-gradient(120deg,rgba(43,232,200,0.10),rgba(122,92,255,0.10));
  border:1px solid var(--stroke-brand);
  box-shadow:var(--sh-1);
}
.cta-band h2{font-size:24px;margin-bottom:8px;}
.cta-band p{color:var(--text-2);font-size:14.5px;}
.cta-actions{display:flex;align-items:center;gap:18px;flex-wrap:wrap;}

/* ---------- 页脚 ---------- */
.footer{
  margin-top:var(--sec-pad);
  background:#060510;
  border-top:1px solid rgba(43,232,200,0.10);
  padding:56px 0 0;
}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:36px;}
.footer h3{font-size:14px;letter-spacing:0.06em;color:var(--text);margin-bottom:16px;}
.footer ul{display:flex;flex-direction:column;gap:10px;}
.footer ul a{color:var(--text-2);font-size:14px;text-decoration:none;}
.footer ul a:hover{color:var(--brand);text-decoration:underline;text-underline-offset:4px;}
.footer-about{margin-top:16px;font-size:13.5px;color:var(--text-3);line-height:1.85;max-width:360px;}
.footer .brand{margin-bottom:4px;}
.footer-bottom{
  margin-top:44px;padding:22px 0 30px;border-top:1px solid var(--line-soft);
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:var(--text-3);
}
.to-top{display:inline-flex;align-items:center;gap:8px;color:var(--text-2);font-size:13.5px;text-decoration:none;}
.to-top:hover{color:var(--brand);text-decoration:none;}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .hero h1{font-size:38px;}
  .card-grid{grid-template-columns:repeat(2,1fr);}
}
@media (max-width:1023px){
  :root{--sec-pad:36px;}
  .layout{padding-left:0;}
  .rail{display:none;}
  .topbar{display:flex;}
  .hero{padding:40px 0 48px;}
  .hero-grid{grid-template-columns:1fr;gap:36px;}
  .hero h1{font-size:32px;}
  .hero-media img{aspect-ratio:16/10;}
  .media-card{left:12px;bottom:12px;}
  .anchor-nav{top:64px;}
  .version-grid{grid-template-columns:1fr 1fr;}
  .steps{grid-template-columns:repeat(2,1fr);}
  .step::after{display:none;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
  .footer{padding-bottom:72px;}
}
@media (max-width:767px){
  :root{--sec-pad:28px;}
  .container{padding:0 16px;}
  .hero h1{font-size:28px;}
  .hero-sub{font-size:17px;}
  .hero-actions .btn{width:100%;}
  .stat-row{gap:20px;}
  .stat-row strong{font-size:22px;}
  .section-head h2{font-size:22px;}
  .card-grid{grid-template-columns:1fr;}
  .version-grid{grid-template-columns:1fr;}
  .scene-grid{grid-template-columns:1fr;}
  .steps{grid-template-columns:1fr;}
  .faq-q{font-size:15.5px;padding:18px 16px;}
  .faq-a p{padding:0 16px 18px;}
  .cta-band{padding:24px;}
  .cta-band h2{font-size:20px;}
  .cta-actions{width:100%;}
  .cta-actions .btn{width:100%;}
  .footer-grid{grid-template-columns:1fr;}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;transition-duration:.001ms !important;scroll-behavior:auto !important;}
}

/* roulang page: category3 */
:root{
  --bg-base:#08070F;
  --bg-alt:#0E0D1A;
  --bg-elev:#151327;
  --brand:#2BE8C8;
  --accent:#FFB454;
  --violet:#7A5CFF;
  --text:#EDF1F7;
  --text-2:#9AA3B8;
  --text-3:#6B7387;
  --ok:#37D67A;
  --warn:#FFB454;
  --err:#FF5C7A;
  --line:rgba(255,255,255,0.08);
  --line-soft:rgba(255,255,255,0.06);
  --line-brand:rgba(43,232,200,0.16);
  --glass-nav:rgba(255,255,255,0.07);
  --glass-card:rgba(255,255,255,0.055);
  --glass-cta:rgba(255,255,255,0.10);
  --r-card:18px;
  --r-panel:20px;
  --r-poster:22px;
  --r-btn:999px;
  --r-input:12px;
  --r-img:16px;
  --sh-1:0 8px 30px rgba(0,0,0,0.45);
  --sh-2:0 16px 44px rgba(0,0,0,0.55);
  --glow:0 0 0 1px rgba(43,232,200,0.35),0 0 24px rgba(43,232,200,0.22);
  --ease:cubic-bezier(.2,.7,.3,1);
  --rail-w:240px;
  --sec-y:96px;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg-base);
  color:var(--text);
  font-family:"Inter","PingFang SC","HarmonyOS Sans SC","Source Han 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;
  background-image:radial-gradient(circle at 18% 12%,rgba(122,92,255,0.14),transparent 42%),radial-gradient(circle at 82% 8%,rgba(43,232,200,0.10),transparent 40%);
  pointer-events:none;
  z-index:0;
}
img{max-width:100%;display:block;border-radius:var(--r-img);}
a{color:var(--brand);text-decoration:none;transition:color 200ms var(--ease),opacity 200ms var(--ease);}
a:hover{color:#5cf3d9;text-decoration:underline;text-underline-offset:4px;}
a:focus-visible,button:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px;}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3{font-weight:700;letter-spacing:-0.01em;line-height:1.4;margin:0;}
p{margin:0;}
.container{max-width:1240px;margin:0 auto;padding:0 24px;}

/* ============ 左侧竖向导航 ============ */
.rail{
  position:fixed;left:0;top:0;bottom:0;width:var(--rail-w);
  background:rgba(14,13,26,0.92);
  backdrop-filter:blur(14px) saturate(120%);
  border-right:1px solid var(--line-brand);
  display:flex;flex-direction:column;
  padding:24px 16px;
  z-index:60;
}
.brand{display:flex;align-items:center;gap:12px;padding:4px 8px 22px;text-decoration:none;}
.brand:hover{text-decoration:none;}
.brand-mark{
  width:42px;height:42px;flex:0 0 42px;border-radius:13px;
  display:grid;place-items:center;
  background:linear-gradient(135deg,rgba(43,232,200,0.22),rgba(122,92,255,0.28));
  border:1px solid var(--line-brand);
  color:var(--brand);font-weight:700;font-size:16px;letter-spacing:0;
}
.brand-text{display:flex;flex-direction:column;line-height:1.25;}
.main-word{font-size:17px;font-weight:700;color:var(--text);letter-spacing:-0.01em;}
.sub-word{font-size:8px;letter-spacing:0.14em;color:var(--text-3);text-transform:none;margin-top:3px;}
.rail-nav{display:flex;flex-direction:column;gap:6px;margin-top:8px;}
.rail-link{
  position:relative;display:flex;align-items:center;gap:12px;
  padding:12px 14px;border-radius:12px;
  color:var(--text-2);font-size:14.5px;font-weight:500;
  transition:background 200ms var(--ease),color 200ms var(--ease),transform 200ms var(--ease);
}
.rail-link i{width:20px;text-align:center;font-size:15px;color:var(--text-3);transition:color 200ms var(--ease);}
.rail-link:hover{background:rgba(255,255,255,0.045);color:var(--text);text-decoration:none;transform:translateX(2px);}
.rail-link:hover i{color:var(--brand);}
.rail-link.active{background:rgba(43,232,200,0.09);color:var(--brand);font-weight:600;}
.rail-link.active i{color:var(--brand);}
.rail-link.active::before{
  content:"";position:absolute;left:-16px;top:10px;bottom:10px;width:3px;
  border-radius:0 3px 3px 0;background:var(--brand);box-shadow:0 0 12px rgba(43,232,200,0.6);
}
.rail-foot{margin-top:auto;display:flex;flex-direction:column;gap:10px;padding-top:18px;border-top:1px solid var(--line-soft);}
.rail-note{font-size:12px;color:var(--text-3);line-height:1.7;letter-spacing:0.02em;}
.rail-cta{
  display:block;text-align:center;padding:12px 16px;border-radius:var(--r-btn);
  background:var(--accent);color:#08070F;font-weight:700;font-size:14px;
  transition:transform 220ms var(--ease),box-shadow 220ms var(--ease),filter 220ms var(--ease);
}
.rail-cta:hover{text-decoration:none;color:#08070F;filter:brightness(1.08);transform:translateY(-2px);box-shadow:0 0 0 1px rgba(43,232,200,0.35),0 0 24px rgba(43,232,200,0.22);}

/* ============ 移动端顶栏与抽屉 ============ */
.topbar{
  display:none;position:fixed;top:0;left:0;right:0;height:64px;z-index:70;
  align-items:center;justify-content:space-between;padding:0 16px;
  background:rgba(14,13,26,0.92);
  backdrop-filter:blur(14px) saturate(120%);
  border-bottom:1px solid var(--line-brand);
}
.topbar .brand{padding:0;gap:10px;}
.topbar .brand-mark{width:36px;height:36px;flex:0 0 36px;font-size:14px;border-radius:11px;}
.topbar .main-word{font-size:15px;}
.topbar .sub-word{font-size:7.5px;}
.hamburger{width:42px;height:42px;border-radius:12px;display:grid;place-items:center;color:var(--text);background:rgba(255,255,255,0.06);border:1px solid var(--line);}
.hamburger i{font-size:17px;}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:82vw;max-width:340px;z-index:90;
  background:var(--bg-alt);border-left:1px solid var(--line-brand);
  padding:24px 20px;display:flex;flex-direction:column;gap:18px;
  transform:translateX(102%);transition:transform 260ms var(--ease);
}
.drawer.open{transform:translateX(0);}
.drawer-mask{position:fixed;inset:0;background:rgba(4,3,8,0.66);opacity:0;visibility:hidden;transition:opacity 240ms var(--ease),visibility 240ms;z-index:80;}
.drawer-mask.open{opacity:1;visibility:visible;}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding-bottom:14px;border-bottom:1px solid var(--line-soft);}
.drawer-close{width:38px;height:38px;border-radius:11px;background:rgba(255,255,255,0.06);border:1px solid var(--line);display:grid;place-items:center;color:var(--text-2);}
.drawer .rail-nav{gap:4px;}
.drawer .rail-link{padding:14px;font-size:15px;}
.drawer .rail-link.active::before{left:-20px;}

/* ============ 内容骨架 ============ */
.content-wrap{margin-left:var(--rail-w);position:relative;z-index:1;}
.main{display:block;}
.section{padding:var(--sec-y) 0;}
.section-alt{background:var(--bg-alt);border-top:1px solid var(--line-soft);border-bottom:1px solid var(--line-soft);}
.sec-head{max-width:760px;margin-bottom:44px;}
.sec-head .cap{display:flex;align-items:center;gap:8px;font-size:13px;letter-spacing:0.02em;color:var(--brand);margin-bottom:12px;}
.sec-head .cap::before{content:"";width:3px;height:14px;border-radius:2px;background:var(--brand);}
.sec-head h2{font-size:30px;}
.sec-sub{margin-top:12px;font-size:14.5px;color:var(--text-2);line-height:1.8;}

/* ============ Hero ============ */
.hero{position:relative;padding:72px 0 80px;overflow:hidden;}
.hero-bg{position:absolute;inset:0;background-image:url("/assets/images/backpic/back-3.webp");background-size:cover;background-position:center;opacity:0.5;z-index:0;}
.hero-mask{position:absolute;inset:0;z-index:1;background:linear-gradient(180deg,rgba(8,7,15,0.90) 0%,rgba(8,7,15,0.72) 45%,rgba(8,7,15,0.96) 100%);}
.hero-noise{position:absolute;inset:0;z-index:2;opacity:0.12;background-image:repeating-linear-gradient(60deg,rgba(255,255,255,0.06) 0 1px,transparent 1px 9px);}
.hero-inner{position:relative;z-index:3;display:grid;grid-template-columns:minmax(0,6fr) minmax(0,5fr);gap:56px;align-items:center;}
.crumb{display:flex;flex-wrap:wrap;gap:8px;font-size:13px;color:var(--text-3);margin-bottom:20px;letter-spacing:0.02em;}
.crumb a{color:var(--text-3);}
.crumb a:hover{color:var(--brand);}
.crumb .cur{color:var(--text-2);}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:var(--r-btn);font-size:12px;letter-spacing:0.02em;
  background:rgba(43,232,200,0.12);color:var(--brand);margin-bottom:20px;
}
.tag.warm{background:rgba(255,180,84,0.14);color:var(--accent);}
h1{font-size:44px;line-height:1.28;}
h1 .h1-line{display:block;}
h1 .h1-line.accent{color:var(--brand);}
.hero-sub{margin-top:20px;font-size:16px;color:var(--text-2);max-width:520px;line-height:1.85;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px;}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 28px;border-radius:var(--r-btn);font-size:15px;font-weight:600;
  transition:transform 220ms var(--ease),box-shadow 220ms var(--ease),background 220ms var(--ease),filter 220ms var(--ease),color 220ms var(--ease);
}
.btn-primary{background:var(--accent);color:#08070F;}
.btn-primary:hover{text-decoration:none;color:#08070F;filter:brightness(1.08);transform:translateY(-2px);box-shadow:0 0 0 1px rgba(43,232,200,0.35),0 0 24px rgba(43,232,200,0.28);}
.btn-primary:active{transform:translateY(1px);box-shadow:0 0 0 1px rgba(43,232,200,0.2);}
.btn-ghost{background:transparent;border:1px solid rgba(43,232,200,0.4);color:var(--brand);}
.btn-ghost:hover{text-decoration:none;background:rgba(43,232,200,0.10);color:var(--brand);transform:translateY(-2px);}
.btn-ghost:active{transform:translateY(1px);}
.btn[disabled],.btn.is-disabled{opacity:0.45;cursor:not-allowed;box-shadow:none;transform:none;}
.hero-metrics{display:flex;flex-wrap:wrap;gap:32px;margin-top:44px;padding-top:26px;border-top:1px solid var(--line-soft);}
.metric-num{font-size:24px;font-weight:700;color:var(--text);font-variant-numeric:tabular-nums;}
.metric-num em{font-style:normal;color:var(--brand);}
.metric-label{font-size:12.5px;color:var(--text-3);letter-spacing:0.02em;margin-top:2px;}
.hero-visual{display:flex;justify-content:center;}
.poster{
  position:relative;width:100%;max-width:320px;aspect-ratio:9/16;border-radius:28px;overflow:hidden;
  border:1px solid rgba(255,255,255,0.10);box-shadow:var(--sh-2);
}
.poster img{width:100%;height:100%;object-fit:cover;border-radius:0;}
.poster::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(8,7,15,0.25) 0%,rgba(8,7,15,0.05) 40%,rgba(8,7,15,0.88) 100%);}
.poster-top{position:absolute;top:14px;left:14px;right:14px;display:flex;justify-content:space-between;align-items:center;z-index:2;font-size:11px;color:rgba(237,241,247,0.82);letter-spacing:0.04em;}
.poster-dot{width:7px;height:7px;border-radius:50%;background:var(--ok);box-shadow:0 0 10px rgba(55,214,122,0.9);display:inline-block;margin-right:6px;}
.poster-play{
  position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);
  width:64px;height:64px;border-radius:50%;z-index:2;
  background:rgba(255,255,255,0.10);border:1px solid rgba(43,232,200,0.4);
  backdrop-filter:blur(10px);display:grid;place-items:center;color:var(--brand);font-size:20px;
  transition:transform 220ms var(--ease),box-shadow 220ms var(--ease);
}
.poster:hover .poster-play{transform:translate(-50%,-50%) scale(1.06);box-shadow:var(--glow);}
.poster-bottom{position:absolute;bottom:16px;left:16px;right:16px;z-index:2;}
.poster-bottom .pb-title{font-size:14px;font-weight:600;color:var(--text);line-height:1.5;}
.poster-bottom .pb-meta{font-size:11.5px;color:var(--text-2);margin-top:5px;}
.poster-badge{
  position:absolute;right:16px;top:44px;z-index:2;font-size:11px;padding:4px 10px;border-radius:999px;
  background:rgba(255,180,84,0.16);color:var(--accent);
}

/* ============ 编号清单（大号编号） ============ */
.num-list{border-top:1px solid var(--line-soft);}
.num-row{
  display:grid;grid-template-columns:88px minmax(0,1fr) 96px;gap:24px;align-items:center;
  padding:28px 8px;border-bottom:1px solid var(--line-soft);
  transition:transform 220ms var(--ease),background 220ms var(--ease);
}
.num-row:hover{background:rgba(255,255,255,0.035);transform:translateX(4px);}
.num{
  font-size:32px;font-weight:700;line-height:1;
  color:transparent;-webkit-text-stroke:1px rgba(43,232,200,0.75);
  font-variant-numeric:tabular-nums;transition:color 220ms var(--ease);
}
.num-row:hover .num{-webkit-text-stroke:1px var(--brand);color:rgba(43,232,200,0.16);}
.num-body h3{font-size:19px;}
.num-body p{margin-top:8px;font-size:14.5px;color:var(--text-2);line-height:1.85;max-width:640px;}
.num-thumb{width:96px;height:96px;border-radius:16px;overflow:hidden;border:1px solid rgba(255,255,255,0.08);position:relative;}
.num-thumb img{width:100%;height:100%;object-fit:cover;border-radius:0;transition:transform 220ms var(--ease);}
.num-row:hover .num-thumb img{transform:scale(1.04);}
.num-arrow{width:48px;height:48px;border-radius:50%;display:grid;place-items:center;border:1px solid rgba(43,232,200,0.35);color:var(--brand);font-size:14px;transition:background 220ms var(--ease),transform 220ms var(--ease);}
.num-row:hover .num-arrow{background:rgba(43,232,200,0.12);transform:translateX(3px);}

/* ============ 粘性锚点导航 ============ */
.anchor-bar{
  position:sticky;top:20px;z-index:30;
  display:flex;flex-wrap:wrap;gap:10px;
  padding:12px;margin-bottom:44px;border-radius:16px;
  background:rgba(21,19,39,0.86);
  backdrop-filter:blur(14px) saturate(120%);
  border:1px solid var(--line-brand);box-shadow:var(--sh-1);
}
.anchor-bar a{
  padding:8px 16px;border-radius:var(--r-btn);font-size:13.5px;color:var(--text-2);
  background:rgba(255,255,255,0.04);transition:all 220ms var(--ease);
}
.anchor-bar a:hover{text-decoration:none;color:var(--brand);background:rgba(43,232,200,0.12);}
.anchor-bar a.is-active{color:var(--brand);background:rgba(43,232,200,0.14);box-shadow:var(--glow);}

/* ============ 分组区 ============ */
.group{margin-bottom:56px;scroll-margin-top:120px;}
.group:last-child{margin-bottom:0;}
.group-head{display:flex;align-items:flex-start;gap:14px;margin-bottom:24px;}
.group-index{
  flex:0 0 auto;min-width:44px;height:44px;padding:0 12px;border-radius:12px;display:grid;place-items:center;
  background:rgba(122,92,255,0.16);border:1px solid rgba(122,92,255,0.35);
  color:#b9a8ff;font-size:14px;font-weight:700;font-variant-numeric:tabular-nums;
}
.group-head h2{font-size:30px;}
.group-head .group-desc{margin-top:6px;font-size:14px;color:var(--text-2);line-height:1.8;max-width:680px;}
.g-list{display:grid;gap:14px;}
.g-item{
  display:grid;grid-template-columns:44px minmax(0,1fr);gap:16px;
  padding:22px 24px;border-radius:var(--r-card);
  background:var(--glass-card);border:1px solid var(--line);
  backdrop-filter:blur(14px) saturate(120%);
  box-shadow:var(--sh-1);
  transition:transform 220ms var(--ease),border-color 220ms var(--ease),box-shadow 220ms var(--ease);
}
.g-item:hover{transform:translateY(-4px);border-color:rgba(43,232,200,0.35);box-shadow:var(--sh-2);}
.g-icon{width:44px;height:44px;border-radius:13px;display:grid;place-items:center;background:rgba(43,232,200,0.12);color:var(--brand);font-size:16px;}
.g-item h3{font-size:17px;}
.g-item p{margin-top:8px;font-size:14.5px;color:var(--text-2);line-height:1.85;}
.chip-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px;}
.chip{font-size:12px;padding:4px 11px;border-radius:var(--r-btn);background:rgba(43,232,200,0.10);color:var(--brand);letter-spacing:0.02em;}
.chip.warm{background:rgba(255,180,84,0.14);color:var(--accent);}
.chip.gray{background:rgba(255,255,255,0.06);color:var(--text-2);}

/* ============ 提示条 ============ */
.notice{
  display:flex;gap:16px;align-items:flex-start;
  margin-top:36px;padding:22px 24px;border-radius:var(--r-card);
  background:rgba(255,180,84,0.08);border:1px solid rgba(255,180,84,0.30);
}
.notice i{color:var(--accent);font-size:18px;margin-top:4px;}
.notice h3{font-size:16px;color:var(--accent);}
.notice p{margin-top:6px;font-size:14px;color:var(--text-2);line-height:1.85;}

/* ============ FAQ ============ */
.faq-list{display:grid;gap:12px;}
.faq-item{
  border-radius:var(--r-card);background:var(--glass-card);border:1px solid var(--line);
  backdrop-filter:blur(14px) saturate(120%);overflow:hidden;
  transition:border-color 220ms var(--ease),box-shadow 220ms var(--ease);
}
.faq-item:hover{border-color:rgba(43,232,200,0.28);}
.faq-item.open{border-color:rgba(43,232,200,0.4);box-shadow:var(--sh-1);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 24px;text-align:left;font-size:17px;font-weight:700;color:var(--text);
}
.faq-q:hover{color:var(--brand);}
.faq-q i{flex:0 0 auto;width:26px;height:26px;border-radius:50%;display:grid;place-items:center;font-size:12px;background:rgba(43,232,200,0.12);color:var(--brand);transition:transform 220ms var(--ease);}
.faq-item.open .faq-q i{transform:rotate(45deg);}
.faq-a{max-height:0;overflow:hidden;transition:max-height 260ms var(--ease);}
.faq-item.open .faq-a{max-height:420px;}
.faq-a p{padding:0 24px 22px;font-size:15px;color:var(--text-2);line-height:1.9;}

/* ============ CTA 条 ============ */
.cta-band{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:24px;
  padding:32px;border-radius:var(--r-panel);
  background:var(--glass-cta);border:1px solid var(--line-brand);
  backdrop-filter:blur(14px) saturate(120%);box-shadow:var(--sh-1);
}
.cta-band h2{font-size:22px;}
.cta-band p{margin-top:8px;font-size:14.5px;color:var(--text-2);max-width:600px;line-height:1.85;}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;align-items:center;}
.link-more{font-size:14.5px;color:var(--brand);}
.link-more i{font-size:12px;margin-left:5px;transition:transform 220ms var(--ease);}
.link-more:hover i{transform:translateX(3px);}

/* ============ 页脚 ============ */
.footer{background:#06050C;border-top:1px solid rgba(43,232,200,0.10);padding:64px 0 0;margin-top:0;}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;}
.footer .brand{padding:0 0 18px;}
.footer-about{font-size:13.5px;color:var(--text-3);line-height:1.9;max-width:340px;}
.footer h3{font-size:14px;color:var(--text);margin-bottom:16px;letter-spacing:0.02em;}
.footer ul li{margin-bottom:10px;}
.footer ul a{font-size:13.5px;color:var(--text-2);}
.footer ul a:hover{color:var(--brand);text-decoration:none;}
.footer-bottom{
  margin-top:48px;padding:22px 0 28px;border-top:1px solid var(--line-soft);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;align-items:center;
  font-size:12.5px;color:var(--text-3);letter-spacing:0.02em;
}
.to-top{color:var(--text-2);font-size:12.5px;}
.to-top i{margin-right:6px;font-size:11px;}
.to-top:hover{color:var(--brand);text-decoration:none;}

/* ============ 移动端底部 CTA ============ */
.mobile-bar{
  display:none;position:fixed;left:0;right:0;bottom:0;z-index:75;
  align-items:center;justify-content:space-between;gap:12px;
  padding:10px 16px calc(10px + env(safe-area-inset-bottom));
  background:rgba(14,13,26,0.95);backdrop-filter:blur(14px);
  border-top:1px solid var(--line-brand);
}
.mobile-bar .mb-info{display:flex;flex-direction:column;line-height:1.4;}
.mobile-bar .mb-info strong{font-size:14px;color:var(--text);}
.mobile-bar .mb-info span{font-size:11.5px;color:var(--text-3);}
.mobile-bar .btn{padding:11px 22px;font-size:14px;}

/* ============ 响应式 ============ */
@media (max-width:1439px){
  .hero-inner{gap:44px;}
  .num-row{grid-template-columns:80px minmax(0,1fr) 88px;gap:20px;}
}
@media (max-width:1279px){
  .rail{width:88px;padding:20px 12px;align-items:center;}
  .rail .brand-text{display:none;}
  .rail .brand{padding:4px 0 18px;justify-content:center;}
  .rail-link{justify-content:center;padding:14px 0;}
  .rail-link span{display:none;}
  .rail-link i{font-size:17px;}
  .rail-link.active::before{left:-12px;}
  .rail-foot .rail-note{display:none;}
  .rail-cta{padding:12px 0;font-size:1px;color:transparent;}
  .rail-cta i{font-size:15px;color:#08070F;}
  .content-wrap{margin-left:88px;}
  .section{padding:72px 0;}
  .sec-head h2,.group-head h2{font-size:26px;}
  h1{font-size:36px;}
}
@media (max-width:1023px){
  .rail{display:none;}
  .topbar{display:flex;}
  .content-wrap{margin-left:0;padding-top:64px;}
  .hero{padding:48px 0 60px;}
  .hero-inner{grid-template-columns:1fr;gap:40px;}
  .hero-copy{max-width:660px;}
  .hero-visual{order:2;}
  .poster{max-width:280px;}
  .section{padding:64px 0;}
  .anchor-bar{top:76px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .footer-about{max-width:none;}
}
@media (max-width:767px){
  .container{padding:0 16px;}
  h1{font-size:28px;}
  h2,.sec-head h2,.group-head h2,.cta-band h2{font-size:22px;}
  .sec-head{margin-bottom:32px;}
  .section{padding:56px 0;}
  .hero{padding:36px 0 48px;}
  .hero-sub{font-size:15px;}
  .hero-actions{gap:12px;}
  .hero-actions .btn{width:100%;}
  .hero-metrics{gap:22px;}
  .num-row{grid-template-columns:56px minmax(0,1fr);gap:16px;padding:22px 0;}
  .num{font-size:26px;}
  .num-thumb,.num-arrow{display:none;}
  .num-body h3{font-size:17px;}
  .g-item{grid-template-columns:1fr;padding:20px;}
  .g-icon{margin-bottom:2px;}
  .faq-q{font-size:15.5px;padding:18px;}
  .faq-a p{padding:0 18px 18px;font-size:14.5px;}
  .cta-band{padding:24px;flex-direction:column;align-items:flex-start;}
  .cta-actions .btn{width:100%;}
  .footer{padding-top:48px;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;padding-bottom:88px;}
  .mobile-bar{display:flex;}
  .anchor-bar{top:74px;padding:10px;}
  .anchor-bar a{padding:7px 13px;font-size:13px;}
}
@media (max-width:520px){
  .poster{max-width:min(68vw,260px);}
  .hero-metrics{gap:18px;}
  .metric-num{font-size:20px;}
  .chip{font-size:11.5px;}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:0.01ms !important;transition-duration:0.01ms !important;}
  html{scroll-behavior:auto;}
}