/* roulang page: index */
:root{
  --ink:#0B0912;
  --ink-2:#14101D;
  --panel:#1A1524;
  --card:#16121F;
  --line:rgba(200,247,81,.14);
  --line-soft:rgba(255,255,255,.08);
  --neon:#C8F751;
  --coral:#FF7A45;
  --text:#EEEBF6;
  --muted:#A29CB8;
  --ok:#4ADE80;
  --warn:#FBBF24;
  --radius:16px;
  --radius-lg:24px;
  --shadow:0 8px 30px rgba(0,0,0,.45);
  --shadow-hover:0 14px 38px rgba(0,0,0,.6);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--ink);
  color:var(--text);
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer;border:0;background:none}
input{font-family:inherit}
h1,h2,h3,h4,p,ul,ol,dl,dd,figure{margin:0;padding:0}
ul,ol{list-style:none}
.num{font-variant-numeric:tabular-nums}
.wrap{width:100%;max-width:1200px;margin:0 auto;padding-left:16px;padding-right:16px}
@media (min-width:768px){.wrap{padding-left:24px;padding-right:24px}}
@media (min-width:1024px){.wrap{padding-left:32px;padding-right:32px}}
.section{padding-top:56px;padding-bottom:56px}
@media (min-width:1024px){.section{padding-top:96px;padding-bottom:96px}}
.read-width{max-width:720px}
.h2{font-size:clamp(24px,3.2vw,34px);font-weight:700;line-height:1.3;letter-spacing:-.01em}
.h3{font-size:20px;font-weight:600;line-height:1.5}
.lead{color:var(--muted);font-size:16px;line-height:1.85}
.hairline{height:1px;background:linear-gradient(90deg,transparent,rgba(200,247,81,.55),transparent)}
.grid-overlay{
  background-image:
    linear-gradient(rgba(200,247,81,.055) 1px,transparent 1px),
    linear-gradient(90deg,rgba(200,247,81,.055) 1px,transparent 1px);
  background-size:52px 52px;
}
/* 按钮 */
.btn-primary{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  background:var(--neon);color:var(--ink);font-weight:700;font-size:15px;
  padding:12px 24px;border-radius:12px;
  transition:transform .18s ease-out, box-shadow .18s ease-out, background .18s ease-out;
}
.btn-primary:hover{
  transform:translateY(-2px);
  box-shadow:0 0 0 1px rgba(200,247,81,.5), 0 8px 24px rgba(200,247,81,.18);
}
.btn-primary:active{transform:translateY(1px)}
.btn-primary[disabled]{opacity:.4;pointer-events:none}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  background:transparent;color:var(--text);font-weight:600;font-size:15px;
  padding:12px 22px;border-radius:12px;border:1px solid rgba(255,255,255,.18);
  transition:border-color .18s ease-out, background .18s ease-out, transform .18s ease-out;
}
.btn-ghost:hover{
  border-color:var(--neon);background:rgba(200,247,81,.08);transform:translateY(-2px);
}
.btn-ghost:active{transform:translateY(1px)}
.link-arrow{
  display:inline-flex;align-items:center;gap:6px;color:var(--neon);
  font-size:14px;font-weight:600;
}
.link-arrow span.arw{transition:transform .18s ease-out;display:inline-block}
.link-arrow:hover span.arw{transform:translateX(3px)}
.link-arrow:hover{text-decoration:underline;text-underline-offset:3px}
a:focus-visible,button:focus-visible,input:focus-visible,[tabindex]:focus-visible{
  outline:2px solid var(--neon);outline-offset:2px;border-radius:6px;
}
/* 卡片 */
.card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);
  transition:transform .18s ease-out, border-color .18s ease-out, box-shadow .18s ease-out;
  overflow:hidden;
}
.card:hover,.card:focus-within{
  transform:translateY(-4px);
  border-color:rgba(200,247,81,.4);
  box-shadow:var(--shadow-hover);
}
.card-flat{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  transition:border-color .18s ease-out, background .18s ease-out;
}
.card-flat:hover,.card-flat:focus-within{border-color:rgba(200,247,81,.4)}
/* 徽章 */
.badge{
  display:inline-flex;align-items:center;gap:6px;font-size:12px;line-height:1;
  padding:7px 12px;border-radius:9999px;
  border:1px solid rgba(200,247,81,.35);color:var(--neon);background:rgba(200,247,81,.08);
  white-space:nowrap;
}
.badge-coral{
  border-color:rgba(255,122,69,.42);color:var(--coral);background:rgba(255,122,69,.08);
}
.badge-ok{border-color:rgba(74,222,128,.4);color:var(--ok);background:rgba(74,222,128,.08)}
.badge-plain{border-color:rgba(255,255,255,.16);color:var(--muted);background:rgba(255,255,255,.04)}
/* 导航 */
.nav-link{
  position:relative;font-size:15px;color:var(--muted);padding:6px 0;white-space:nowrap;
  transition:color .18s ease-out;
}
.nav-link:hover{color:var(--text)}
.nav-link.is-active{color:var(--neon);text-shadow:0 0 12px rgba(200,247,81,.45)}
.nav-link.is-active::after{
  content:"";position:absolute;left:0;right:0;bottom:-4px;height:2px;background:var(--neon);
}
/* 流程卡 */
.step-card{position:relative;padding:26px 22px}
.step-num{
  font-size:44px;font-weight:800;line-height:1;letter-spacing:-.03em;
  color:transparent;-webkit-text-stroke:1px rgba(200,247,81,.6);
  font-variant-numeric:tabular-nums;
}
.flow-line{display:none}
@media (min-width:1024px){
  .flow-line{
    display:block;position:absolute;left:6%;right:6%;top:74px;height:0;
    border-top:1px dashed rgba(200,247,81,.28);z-index:0;
  }
}
/* 列表 */
.list-row{
  border-bottom:1px solid var(--line-soft);
  transition:background .18s ease-out;
}
.list-row:hover{background:rgba(255,255,255,.04)}
.list-row:last-child{border-bottom:0}
/* 手风琴 */
.faq-item{
  background:var(--panel);border:1px solid var(--line);border-radius:12px;
  border-left:3px solid transparent;
  transition:border-color .2s ease-out, background .2s ease-out;
  margin-bottom:12px;overflow:hidden;
}
.faq-item.is-open{border-left-color:var(--neon)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  text-align:left;font-size:17px;font-weight:600;color:var(--text);
  padding:18px 20px;line-height:1.6;
}
.faq-q:hover{color:var(--neon)}
.faq-plus{
  flex:0 0 auto;width:22px;height:22px;position:relative;
  transition:transform .25s ease-out;
}
.faq-plus::before,.faq-plus::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--neon);
}
.faq-plus::before{width:12px;height:2px;transform:translate(-50%,-50%)}
.faq-plus::after{width:2px;height:12px;transform:translate(-50%,-50%)}
.faq-item.is-open .faq-plus{transform:rotate(45deg)}
.faq-a{
  max-height:0;overflow:hidden;
  transition:max-height .3s ease-out;
}
.faq-a-inner{padding:0 20px 20px;color:var(--muted);font-size:16px;line-height:1.85}
/* 进度 */
.dot-done{background:var(--neon);box-shadow:0 0 0 4px rgba(200,247,81,.16), 0 0 16px rgba(200,247,81,.5)}
.dot-todo{background:var(--ink-2);border:1px solid rgba(255,255,255,.25)}
/* 入场 */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .4s ease-out, transform .4s ease-out}
.reveal.is-in{opacity:1;transform:none}
@media (prefers-reduced-motion: reduce){
  .reveal{opacity:1;transform:none;transition:none}
  html{scroll-behavior:auto}
}
/* 抽屉 */
.drawer{
  position:fixed;top:0;right:0;height:100%;width:84%;max-width:360px;
  background:var(--ink-2);border-left:1px solid var(--line);
  transform:translateX(100%);transition:transform .28s ease-out;z-index:80;
  overflow-y:auto;
}
.drawer.is-open{transform:translateX(0)}
.drawer-mask{
  position:fixed;inset:0;background:rgba(0,0,0,.6);opacity:0;visibility:hidden;
  transition:opacity .28s ease-out, visibility .28s ease-out;z-index:70;
}
.drawer-mask.is-open{opacity:1;visibility:visible}
.drawer-item{
  display:flex;align-items:center;height:56px;padding:0 20px;font-size:16px;
  color:var(--muted);border-left:3px solid transparent;
  transition:color .18s ease-out, background .18s ease-out;
}
.drawer-item:hover{color:var(--text);background:rgba(255,255,255,.04)}
.drawer-item.is-active{color:var(--neon);border-left-color:var(--neon);background:rgba(200,247,81,.07)}
/* 表单 */
.field{
  width:100%;background:#0F0C16;border:1px solid var(--line);border-radius:10px;
  padding:12px 16px;color:var(--text);font-size:16px;
  transition:border-color .18s ease-out, box-shadow .18s ease-out;
}
.field::placeholder{color:var(--muted)}
.field:focus{
  border-color:var(--neon);outline:none;
  box-shadow:0 0 0 3px rgba(200,247,81,.15);
}
::selection{background:rgba(200,247,81,.25);color:#0B0912}
.footer-link{
  color:var(--muted);font-size:14px;display:inline-block;
  transition:color .18s ease-out, transform .18s ease-out;
}
.footer-link:hover{color:var(--text);transform:translateX(-2px)}
.aspect-16-9{aspect-ratio:16/9;overflow:hidden}
.aspect-4-3{aspect-ratio:4/3;overflow:hidden}

/* roulang page: category1 */
:root{
    --ink:#0B0912;
    --ink-2:#14101D;
    --panel:#1A1524;
    --card:#16121F;
    --line:rgba(200,247,81,.14);
    --line-soft:rgba(255,255,255,.08);
    --neon:#C8F751;
    --coral:#FF7A45;
    --text:#EEEBF6;
    --muted:#A29CB8;
    --ok:#4ADE80;
    --warn:#FBBF24;
    --radius-card:16px;
    --radius-lg:24px;
    --shadow:0 8px 30px rgba(0,0,0,.45);
    --glow:0 0 0 1px rgba(200,247,81,.5), 0 8px 24px rgba(200,247,81,.18);
  }
  *,*::before,*::after{box-sizing:border-box}
  html{-webkit-text-size-adjust:100%}
  body{
    margin:0;
    background:var(--ink);
    color:var(--text);
    font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
    font-size:16px;
    line-height:1.85;
    font-variant-numeric:tabular-nums;
    -webkit-font-smoothing:antialiased;
    overflow-x:hidden;
  }
  img{max-width:100%;display:block;border:0}
  a{color:inherit;text-decoration:none}
  button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
  input,textarea{font:inherit}
  h1,h2,h3,h4,p{margin:0}
  ul,ol{margin:0;padding:0;list-style:none}
  :focus-visible{outline:2px solid var(--neon);outline-offset:2px;border-radius:6px}

  .wrap{max-width:1200px;margin:0 auto;padding-left:16px;padding-right:16px}
  @media (min-width:768px){.wrap{padding-left:24px;padding-right:24px}}
  @media (min-width:1024px){.wrap{padding-left:32px;padding-right:32px}}

  .hairline{height:1px;background:linear-gradient(90deg,transparent,var(--neon),transparent);opacity:.55}
  .v-line{width:3px;border-radius:3px;background:var(--neon);box-shadow:0 0 14px rgba(200,247,81,.45)}

  .grid-overlay{
    background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),
                     linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
    background-size:44px 44px;
  }

  /* 导航 */
  .site-header{
    position:sticky;top:0;z-index:50;
    background:rgba(11,9,18,.88);
    backdrop-filter:blur(12px);
    -webkit-backdrop-filter:blur(12px);
  }
  .site-header::after{
    content:"";display:block;height:1px;
    background:linear-gradient(90deg,transparent,var(--neon),transparent);opacity:.6;
  }
  .logo-mark{
    width:24px;height:24px;border-radius:7px;background:var(--neon);
    box-shadow:0 0 18px rgba(200,247,81,.42);flex:0 0 auto;
  }
  .nav-link{
    position:relative;font-size:15px;color:var(--muted);padding:6px 0;
    transition:color 180ms ease-out;display:inline-block;
  }
  .nav-link:hover{color:var(--text)}
  .nav-link.is-active{color:var(--neon);text-shadow:0 0 12px rgba(200,247,81,.45)}
  .nav-link.is-active::after{
    content:"";position:absolute;left:0;right:0;bottom:-8px;height:2px;
    background:var(--neon);border-radius:2px;
  }
  .footer-link{
    display:inline-block;font-size:14px;color:var(--muted);
    transition:color 180ms ease-out,transform 180ms ease-out;
  }
  .footer-link:hover{color:var(--text);transform:translateX(-2px)}

  .btn-primary{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    padding:12px 24px;border-radius:12px;background:var(--neon);color:var(--ink);
    font-size:15px;font-weight:700;letter-spacing:.01em;
    transition:transform 180ms ease-out,box-shadow 180ms ease-out,background 180ms ease-out;
  }
  .btn-primary:hover{transform:translateY(-2px);box-shadow:var(--glow);background:#D4FF63}
  .btn-primary:active{transform:translateY(1px)}
  .btn-primary[disabled]{opacity:.4;pointer-events:none}
  .btn-ghost{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    padding:12px 22px;border-radius:12px;border:1px solid rgba(255,255,255,.18);
    color:var(--text);font-size:15px;font-weight:600;background:transparent;
    transition:border-color 180ms ease-out,background 180ms ease-out,transform 180ms ease-out;
  }
  .btn-ghost:hover{border-color:var(--neon);background:rgba(200,247,81,.08);transform:translateY(-2px)}
  .btn-ghost:active{transform:translateY(1px)}
  .link-arrow{
    display:inline-flex;align-items:center;gap:6px;color:var(--neon);font-size:14px;font-weight:600;
  }
  .link-arrow span.arrow{transition:transform 180ms ease-out}
  .link-arrow:hover span.arrow{transform:translateX(2px)}
  .link-arrow:hover{text-decoration:underline;text-underline-offset:3px}

  .badge{
    display:inline-flex;align-items:center;gap:6px;
    padding:5px 12px;border-radius:999px;border:1px solid var(--line);
    background:rgba(200,247,81,.07);color:var(--neon);
    font-size:12px;font-weight:600;letter-spacing:.02em;
  }
  .badge-coral{border-color:rgba(255,122,69,.3);background:rgba(255,122,69,.1);color:var(--coral)}
  .badge-plain{border-color:var(--line-soft);background:rgba(255,255,255,.04);color:var(--muted)}

  .card{
    background:var(--card);border:1px solid var(--line);border-radius:var(--radius-card);
    padding:24px;box-shadow:var(--shadow);
    transition:transform 180ms ease-out,border-color 180ms ease-out,box-shadow 180ms ease-out;
  }
  .card:hover,.card:focus-within{transform:translateY(-4px);border-color:rgba(200,247,81,.4);box-shadow:0 14px 36px rgba(0,0,0,.5)}

  .panel-block{
    background:var(--panel);border:1px solid var(--line);border-radius:var(--radius-lg);
    padding:32px;
  }
  @media (min-width:768px){.panel-block{padding:44px}}

  .section{padding-top:56px;padding-bottom:56px}
  @media (min-width:1024px){.section{padding-top:96px;padding-bottom:96px}}

  .list-row{
    display:block;padding:20px 16px;border-bottom:1px solid var(--line-soft);
    transition:background 180ms ease-out;
  }
  .list-row:last-child{border-bottom:0}
  .list-row:hover,.list-row:focus-within{background:rgba(255,255,255,.04)}

  .dot-item{position:relative;padding-left:22px;font-size:16px;color:var(--text);line-height:1.8}
  .dot-item::before{
    content:"";position:absolute;left:0;top:12px;width:8px;height:8px;border-radius:50%;
    background:var(--neon);box-shadow:0 0 10px rgba(200,247,81,.6);
  }

  .info-row{
    display:flex;align-items:baseline;justify-content:space-between;gap:16px;
    padding:14px 0;border-bottom:1px dashed var(--line-soft);
  }
  .info-row:last-child{border-bottom:0}
  .info-row .k{font-size:13px;color:var(--muted);white-space:nowrap}
  .info-row .v{font-size:14px;color:var(--text);font-weight:600;text-align:right}

  .stat-cell{padding:22px 0}
  @media (min-width:1024px){
    .stat-cell{padding:6px 0 6px 28px;border-left:1px solid var(--line-soft)}
    .stat-cell:first-child{border-left:0;padding-left:0}
  }
  .stat-num{font-size:32px;font-weight:800;color:var(--neon);line-height:1.2;letter-spacing:-.02em}

  .prose-cn{max-width:720px;font-size:16.5px;line-height:1.9;color:var(--text)}
  .prose-cn p+p{margin-top:1.25em}
  .prose-cn p{color:rgba(238,235,246,.9)}

  .hero-head{
    position:relative;overflow:hidden;background:var(--panel);
    border-bottom:1px solid var(--line);
  }
  .hero-head .layer{
    position:absolute;inset:0;opacity:.07;
    background-image:linear-gradient(rgba(255,255,255,.5) 1px,transparent 1px),
                     linear-gradient(90deg,rgba(255,255,255,.5) 1px,transparent 1px);
    background-size:40px 40px;
  }
  .img-frame{overflow:hidden;border-radius:var(--radius-card);border:1px solid var(--line);background:var(--card)}
  .img-frame img{width:100%;height:100%;object-fit:cover;transition:transform 300ms ease-out}
  .img-frame:hover img{transform:scale(1.03)}

  .cta-band{
    background:linear-gradient(120deg,rgba(200,247,81,.14),rgba(255,122,69,.10));
    border:1px solid var(--line);border-radius:var(--radius-lg);
    padding:28px;
  }
  @media (min-width:768px){.cta-band{padding:36px 40px}}

  .reveal{opacity:0;transform:translateY(12px);transition:opacity .4s ease-out,transform .4s ease-out}
  .reveal.in{opacity:1;transform:none}
  @media (prefers-reduced-motion:reduce){
    .reveal{opacity:1;transform:none;transition:none}
    .card,.img-frame img,.btn-primary,.btn-ghost,.link-arrow span.arrow{transition:none}
  }

  /* 移动端抽屉 */
  #drawer{
    position:fixed;top:0;right:0;height:100%;width:84%;max-width:360px;z-index:60;
    background:var(--ink-2);border-left:1px solid var(--line);transform:translateX(100%);
    transition:transform 260ms ease-out;overflow-y:auto;
  }
  #drawer.open{transform:translateX(0)}
  #drawerMask{
    position:fixed;inset:0;background:rgba(0,0,0,.6);z-index:55;
    opacity:0;pointer-events:none;transition:opacity 200ms ease-out;
  }
  #drawerMask.open{opacity:1;pointer-events:auto}
  .drawer-link{
    display:flex;align-items:center;height:56px;padding:0 20px;
    border-bottom:1px solid var(--line-soft);color:var(--muted);font-size:15px;
  }
  .drawer-link.is-active{
    color:var(--neon);border-left:3px solid var(--neon);
    background:rgba(200,247,81,.06);
  }

/* roulang page: article */
:root{
    --ink:#0B0912;
    --ink-2:#14101D;
    --panel:#1A1524;
    --card:#16121F;
    --neon:#C8F751;
    --coral:#FF7A45;
    --text:#EEEBF6;
    --muted:#A29CB8;
    --ok:#4ADE80;
    --warn:#FBBF24;
    --line:rgba(200,247,81,.14);
    --line-soft:rgba(255,255,255,.08);
    --input:#0F0C16;
    --radius:16px;
    --radius-lg:24px;
    --shadow:0 8px 30px rgba(0,0,0,.45);
    --glow:0 0 0 1px rgba(200,247,81,.5),0 8px 24px rgba(200,247,81,.18);
    --ease:180ms ease-out;
  }

  *,*::before,*::after{box-sizing:border-box}
  html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
  body{
    margin:0;
    background:var(--ink);
    color:var(--text);
    font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
    font-size:16px;
    line-height:1.85;
    -webkit-font-smoothing:antialiased;
    overflow-x:hidden;
  }
  img{max-width:100%;display:block;height:auto}
  a{color:inherit;text-decoration:none}
  button{font:inherit;cursor:pointer;border:0;background:none;color:inherit}
  ul,ol{margin:0;padding:0;list-style:none}
  h1,h2,h3,h4{margin:0;line-height:1.25;letter-spacing:-0.01em}
  p{margin:0}
  table{border-collapse:collapse}
  :focus-visible{outline:2px solid var(--neon);outline-offset:2px;border-radius:6px}
  ::selection{background:rgba(200,247,81,.3);color:#0B0912}
  .num{font-variant-numeric:tabular-nums}

  .wrap{width:100%;max-width:1200px;margin:0 auto;padding-left:16px;padding-right:16px}
  @media (min-width:768px){.wrap{padding-left:24px;padding-right:24px}}
  @media (min-width:1024px){.wrap{padding-left:32px;padding-right:32px}}

  .hairline{height:1px;background:linear-gradient(90deg,transparent,rgba(200,247,81,.55),transparent)}

  /* ---------- header ---------- */
  .site-header{
    position:sticky;top:0;z-index:50;
    background:rgba(11,9,18,.88);
    backdrop-filter:blur(12px);
    -webkit-backdrop-filter:blur(12px);
  }
  .site-header::after{
    content:"";display:block;height:1px;
    background:linear-gradient(90deg,transparent,rgba(200,247,81,.6),transparent);
  }
  .header-inner{display:flex;align-items:center;justify-content:space-between;gap:18px;min-height:68px}
  .brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
  .brand-mark{
    width:24px;height:24px;border-radius:7px;background:var(--neon);
    box-shadow:0 0 18px rgba(200,247,81,.45);flex-shrink:0;
  }
  .brand-text{display:flex;flex-direction:column;line-height:1.15}
  .brand-main{font-size:16px;font-weight:800;color:var(--text);letter-spacing:-0.01em}
  .brand-sub{font-size:11px;color:var(--muted);letter-spacing:.06em}
  .nav-link{
    position:relative;font-size:15px;color:var(--muted);
    padding:6px 2px;transition:color var(--ease);
    white-space:nowrap;
  }
  .nav-link:hover{color:var(--text)}
  .nav-link.is-active{color:var(--neon);text-shadow:0 0 12px rgba(200,247,81,.45)}
  .nav-link.is-active::after{
    content:"";position:absolute;left:0;right:0;bottom:-6px;height:2px;
    background:var(--neon);border-radius:2px;box-shadow:0 0 12px rgba(200,247,81,.6);
  }
  .header-actions{display:flex;align-items:center;gap:12px}
  .burger{
    width:42px;height:42px;border-radius:12px;border:1px solid var(--line-soft);
    display:inline-flex;align-items:center;justify-content:center;color:var(--text);
    transition:border-color var(--ease),background var(--ease);
  }
  .burger:hover{border-color:var(--neon);background:rgba(200,247,81,.08)}

  /* ---------- buttons ---------- */
  .btn-primary{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    background:var(--neon);color:#0B0912;font-weight:700;font-size:15px;
    padding:12px 24px;border-radius:12px;line-height:1;
    transition:transform var(--ease),box-shadow var(--ease),background var(--ease);
  }
  .btn-primary:hover{transform:translateY(-2px);box-shadow:var(--glow);background:#D6FF66}
  .btn-primary:active{transform:translateY(1px)}
  .btn-primary.btn-sm{padding:10px 18px;font-size:14px}
  .btn-primary.btn-lg{padding:15px 32px;font-size:16px}
  .btn-primary[disabled]{opacity:.4;pointer-events:none}

  .btn-ghost{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    background:transparent;border:1px solid rgba(255,255,255,.18);color:var(--text);
    font-weight:600;font-size:15px;padding:12px 22px;border-radius:12px;line-height:1;
    transition:border-color var(--ease),background var(--ease),transform var(--ease);
  }
  .btn-ghost:hover{border-color:var(--neon);background:rgba(200,247,81,.08);transform:translateY(-2px)}

  .link-arrow{color:var(--neon);font-size:15px;font-weight:600;display:inline-flex;align-items:center;gap:6px}
  .link-arrow i{transition:transform var(--ease)}
  .link-arrow:hover{text-decoration:underline;text-underline-offset:3px}
  .link-arrow:hover i{transform:translateX(2px)}

  /* ---------- badges ---------- */
  .badge{
    display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:600;
    padding:5px 12px;border-radius:999px;border:1px solid var(--line);
    color:var(--neon);background:rgba(200,247,81,.07);letter-spacing:.02em;line-height:1.6;
  }
  .badge-coral{color:var(--coral);border-color:rgba(255,122,69,.3);background:rgba(255,122,69,.1)}
  .badge-ok{color:var(--ok);border-color:rgba(74,222,128,.3);background:rgba(74,222,128,.1)}

  /* ---------- page hero ---------- */
  .page-hero{position:relative;background:var(--panel);overflow:hidden;border-bottom:1px solid var(--line-soft)}
  .page-hero::before{
    content:"";position:absolute;inset:0;pointer-events:none;opacity:.5;
    background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),
                     linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
    background-size:46px 46px;
    -webkit-mask-image:radial-gradient(circle at 22% 40%,#000 0%,transparent 72%);
    mask-image:radial-gradient(circle at 22% 40%,#000 0%,transparent 72%);
  }
  .hero-bar{
    position:absolute;left:0;top:0;bottom:0;width:3px;
    background:linear-gradient(180deg,transparent,var(--neon),transparent);
    box-shadow:0 0 18px rgba(200,247,81,.5);
  }
  .page-hero .inner{position:relative;z-index:2;padding-top:22px;padding-bottom:36px}

  .breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--muted);flex-wrap:nowrap;overflow:hidden}
  .breadcrumb a{color:var(--muted);transition:color var(--ease);white-space:nowrap}
  .breadcrumb a:hover{color:var(--neon)}
  .breadcrumb .sep{color:rgba(162,156,184,.55);flex-shrink:0}
  .breadcrumb .current{
    color:var(--muted);max-width:52vw;overflow:hidden;text-overflow:ellipsis;
    white-space:nowrap;display:inline-block;vertical-align:bottom;
  }
  @media (min-width:768px){.breadcrumb .current{max-width:520px}}

  .article-head{margin-top:20px;max-width:820px}
  .article-title{
    font-size:clamp(28px,4.2vw,44px);font-weight:800;letter-spacing:-0.02em;
    line-height:1.22;margin:14px 0 0;color:var(--text);
  }
  .article-meta{
    display:flex;align-items:center;flex-wrap:wrap;gap:10px;
    margin-top:16px;font-size:13px;color:var(--muted);
  }
  .article-meta .dot{width:4px;height:4px;border-radius:50%;background:rgba(162,156,184,.55);display:inline-block}

  /* ---------- section ---------- */
  .section{padding:56px 0}
  @media (min-width:1024px){.section{padding:88px 0}}
  .section-tight{padding:40px 0}
  @media (min-width:1024px){.section-tight{padding:56px 0}}

  /* ---------- article layout ---------- */
  .article-layout{display:grid;gap:36px;grid-template-columns:1fr}
  @media (min-width:1024px){
    .article-layout{grid-template-columns:minmax(0,1fr) 318px;gap:48px;align-items:start}
  }
  .article-main{min-width:0;max-width:760px}
  @media (max-width:1023px){.article-main{max-width:100%}}

  .article-body{
    font-size:17px;line-height:1.9;color:#DED9EC;
  }
  .article-body > *:first-child{margin-top:0}
  .article-body p{margin:0 0 1.25em}
  .article-body h2{
    position:relative;font-size:clamp(22px,2.6vw,28px);font-weight:700;color:var(--text);
    margin:48px 0 18px;padding-left:16px;line-height:1.35;scroll-margin-top:96px;
  }
  .article-body h2::before{
    content:"";position:absolute;left:0;top:.16em;bottom:.16em;width:4px;border-radius:2px;
    background:var(--neon);box-shadow:0 0 12px rgba(200,247,81,.5);
  }
  .article-body h3{font-size:21px;font-weight:600;color:var(--text);margin:34px 0 12px;scroll-margin-top:96px}
  .article-body h4{font-size:18px;font-weight:600;color:var(--text);margin:26px 0 10px}
  .article-body ul{list-style:none;margin:0 0 1.25em;padding-left:22px}
  .article-body ul > li{position:relative;margin:.55em 0}
  .article-body ul > li::before{
    content:"";position:absolute;left:-22px;top:.72em;width:7px;height:7px;border-radius:2px;
    background:var(--neon);opacity:.85;
  }
  .article-body ol{list-style:decimal;margin:0 0 1.25em;padding-left:1.5em}
  .article-body ol > li{margin:.55em 0;padding-left:.2em}
  .article-body ol > li::marker{color:var(--neon);font-weight:700}
  .article-body blockquote{
    margin:26px 0;padding:18px 22px;background:var(--panel);
    border-left:3px solid var(--neon);border-radius:0 14px 14px 0;
    font-size:17px;color:#DAD5E8;
  }
  .article-body img{
    margin:26px auto;border-radius:14px;border:1px solid var(--line-soft);
  }
  .article-body figure{margin:26px 0}
  .article-body figcaption{font-size:13px;color:var(--muted);text-align:center;margin-top:10px}
  .article-body a{
    color:var(--neon);text-decoration:underline;text-underline-offset:3px;
    text-decoration-color:rgba(200,247,81,.45);transition:text-shadow var(--ease);
  }
  .article-body a:hover{text-shadow:0 0 10px rgba(200,247,81,.45)}
  .article-body code{
    background:var(--panel);border:1px solid var(--line-soft);border-radius:6px;
    padding:2px 7px;font-size:.9em;color:var(--neon);
  }
  .article-body hr{border:0;height:1px;background:var(--line-soft);margin:36px 0}
  .article-body table{width:100%;margin:26px 0;font-size:15px;border:1px solid var(--line-soft);border-radius:10px;overflow:hidden}
  .article-body th,.article-body td{border:1px solid var(--line-soft);padding:11px 14px;text-align:left}
  .article-body th{background:var(--panel);color:var(--text);font-weight:600}
  .article-body td{color:#D6D1E4}
  .article-body strong{color:var(--text);font-weight:700}

  .empty-state{
    border:1px dashed rgba(200,247,81,.35);border-radius:var(--radius);
    background:rgba(26,21,36,.55);padding:40px 24px;text-align:center;
  }
  .empty-state p{color:var(--muted);font-size:16px;margin-bottom:18px}

  /* ---------- tags & related ---------- */
  .tag-row{display:flex;align-items:center;flex-wrap:wrap;gap:10px;margin-top:40px;padding-top:24px;border-top:1px solid var(--line-soft)}
  .tag-row .label{font-size:13px;color:var(--muted);margin-right:2px}
  .tag{
    font-size:13px;color:var(--muted);border:1px solid var(--line-soft);border-radius:999px;
    padding:6px 14px;transition:color var(--ease),border-color var(--ease),background var(--ease);
  }
  .tag:hover{color:var(--neon);border-color:rgba(200,247,81,.45);background:rgba(200,247,81,.07)}

  .related-title{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:22px}
  .related-title h2{font-size:22px;font-weight:700;color:var(--text)}
  @media (min-width:768px){.related-title h2{font-size:26px}}

  .card{
    background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
    padding:20px;transition:transform var(--ease),border-color var(--ease),box-shadow var(--ease);
    display:flex;flex-direction:column;height:100%;
  }
  .card:hover,.card:focus-within{transform:translateY(-4px);border-color:rgba(200,247,81,.4);box-shadow:0 14px 36px rgba(0,0,0,.55)}
  .card-media{
    position:relative;aspect-ratio:16/9;border-radius:12px;overflow:hidden;
    border:1px solid var(--line-soft);margin-bottom:16px;background:var(--panel);
  }
  .card-media img{width:100%;height:100%;object-fit:cover;transition:transform 320ms ease-out}
  .card:hover .card-media img{transform:scale(1.04)}
  .card-title{font-size:17px;font-weight:600;color:var(--text);line-height:1.5;
    display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
  .card-desc{margin-top:10px;font-size:14px;color:var(--muted);line-height:1.8;
    display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
  .card-foot{margin-top:auto;padding-top:16px;display:flex;align-items:center;justify-content:space-between;gap:12px}
  .card-time{font-size:13px;color:var(--muted)}

  /* ---------- sidebar ---------- */
  .article-side{display:flex;flex-direction:column;gap:18px;min-width:0}
  @media (min-width:1024px){.article-side{position:sticky;top:92px}}
  .side-card{
    background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:20px;
  }
  .side-title{font-size:15px;font-weight:700;color:var(--text);letter-spacing:.02em;display:flex;align-items:center;gap:8px}
  .side-title::before{content:"";width:3px;height:14px;border-radius:2px;background:var(--neon);box-shadow:0 0 10px rgba(200,247,81,.5)}
  .toc-list{margin-top:14px;display:flex;flex-direction:column}
  .toc-link{
    display:block;font-size:14px;color:var(--muted);padding:9px 0 9px 12px;
    border-left:1px solid var(--line-soft);line-height:1.6;transition:color var(--ease),border-color var(--ease);
  }
  .toc-link:hover{color:var(--neon);border-left-color:var(--neon)}
  .toc-empty{font-size:13px;color:var(--muted);margin-top:12px}
  .side-list{margin-top:14px;display:flex;flex-direction:column}
  .side-list li{border-bottom:1px solid var(--line-soft)}
  .side-list li:last-child{border-bottom:0}
  .side-list a{display:block;padding:13px 0;transition:background var(--ease)}
  .side-list a:hover .side-item-title{color:var(--neon)}
  .side-item-title{font-size:14px;font-weight:600;color:var(--text);line-height:1.6;
    display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
  .side-item-time{font-size:12px;color:var(--muted);margin-top:5px}
  .side-back{width:100%;margin-top:2px}

  /* ---------- cta band ---------- */
  .cta-band{
    background:linear-gradient(120deg,#C8F751 0%,#B7E93F 55%,#9EDC2E 100%);
    color:#0B0912;border-radius:var(--radius-lg);padding:32px 26px;
    display:flex;flex-direction:column;gap:20px;align-items:flex-start;
    box-shadow:0 18px 44px rgba(200,247,81,.14);
  }
  @media (min-width:768px){
    .cta-band{flex-direction:row;align-items:center;justify-content:space-between;padding:38px 44px;gap:32px}
  }
  .cta-band h2{font-size:clamp(22px,3vw,30px);font-weight:800;letter-spacing:-0.02em;color:#0B0912}
  .cta-band p{margin-top:10px;font-size:15px;color:rgba(11,9,18,.78);max-width:640px;line-height:1.8}
  .cta-band .btn-dark{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    background:#0B0912;color:var(--neon);font-weight:700;font-size:16px;
    padding:15px 32px;border-radius:12px;line-height:1;white-space:nowrap;
    transition:transform var(--ease),box-shadow var(--ease);
  }
  .cta-band .btn-dark:hover{transform:translateY(-2px);box-shadow:0 10px 26px rgba(11,9,18,.4)}

  /* ---------- footer ---------- */
  .footer-link{font-size:14px;color:var(--muted);display:inline-block;transition:color var(--ease),transform var(--ease)}
  .footer-link:hover{color:var(--text);transform:translateX(2px)}

  /* ---------- drawer ---------- */
  .drawer-mask{
    position:fixed;inset:0;background:rgba(0,0,0,.6);z-index:55;
    opacity:0;visibility:hidden;transition:opacity 220ms ease-out,visibility 220ms ease-out;
  }
  .drawer-mask.is-open{opacity:1;visibility:visible}
  .drawer{
    position:fixed;top:0;right:0;bottom:0;width:84%;max-width:360px;z-index:60;
    background:var(--ink-2);border-left:1px solid var(--line);
    transform:translateX(100%);transition:transform 240ms ease-out;
    display:flex;flex-direction:column;padding:20px 18px;
  }
  .drawer.is-open{transform:translateX(0)}
  .drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}
  .drawer-close{
    width:40px;height:40px;border-radius:12px;border:1px solid var(--line-soft);
    display:inline-flex;align-items:center;justify-content:center;color:var(--text);
  }
  .drawer-close:hover{border-color:var(--neon);color:var(--neon)}
  .drawer-link{
    display:flex;align-items:center;height:56px;padding:0 12px;font-size:16px;
    color:var(--muted);border-bottom:1px solid var(--line-soft);
    transition:color var(--ease),background var(--ease);
  }
  .drawer-link:hover{color:var(--text);background:rgba(255,255,255,.04)}
  .drawer-link.is-active{color:var(--neon);box-shadow:inset 3px 0 0 var(--neon)}

  /* ---------- reveal ---------- */
  .reveal{opacity:0;transform:translateY(12px);transition:opacity 400ms ease-out,transform 400ms ease-out}
  .reveal.is-in{opacity:1;transform:none}
  @media (prefers-reduced-motion:reduce){
    html{scroll-behavior:auto}
    .reveal{opacity:1;transform:none;transition:none}
    *{transition-duration:1ms !important;animation-duration:1ms !important}
  }

/* roulang page: category3 */
:root{
    --ink:#0B0912;
    --ink-2:#14101D;
    --panel:#1A1524;
    --card:#16121F;
    --line:rgba(200,247,81,.14);
    --line-soft:rgba(255,255,255,.08);
    --neon:#C8F751;
    --coral:#FF7A45;
    --text:#EEEBF6;
    --muted:#A29CB8;
    --ok:#4ADE80;
    --warn:#FBBF24;
    --radius-card:16px;
    --radius-lg:24px;
    --shadow:0 8px 30px rgba(0,0,0,.45);
    --glow:0 0 0 1px rgba(200,247,81,.5), 0 8px 24px rgba(200,247,81,.18);
    --ease:180ms ease-out;
  }

  *,*::before,*::after{box-sizing:border-box}
  html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
  body{
    margin:0;
    background:var(--ink);
    color:var(--text);
    font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
    font-size:16.5px;
    line-height:1.85;
    font-variant-numeric:tabular-nums;
    -webkit-font-smoothing:antialiased;
    overflow-x:hidden;
  }
  img{max-width:100%;display:block;height:auto}
  a{color:inherit;text-decoration:none}
  button,input,select,textarea{font:inherit;color:inherit}
  ul,ol{margin:0;padding:0;list-style:none}
  h1,h2,h3,h4,p{margin:0}
  :focus-visible{outline:2px solid var(--neon);outline-offset:2px}

  .wrap{width:100%;max-width:1200px;margin:0 auto;padding:0 16px}
  @media (min-width:768px){.wrap{padding:0 24px}}
  @media (min-width:1024px){.wrap{padding:0 32px}}

  .hairline{height:1px;background:linear-gradient(90deg,transparent,rgba(200,247,81,.65),transparent)}
  .divider{height:1px;background:var(--line-soft)}

  .section{padding:56px 0}
  @media (min-width:1024px){.section{padding:92px 0}}
  .section-alt{background:var(--ink-2)}

  .eyebrow{
    display:inline-flex;align-items:center;gap:8px;
    font-size:13px;letter-spacing:.08em;color:var(--neon);
    border:1px solid var(--line);border-radius:999px;padding:6px 14px;
    background:rgba(200,247,81,.06);
  }
  .badge{
    display:inline-flex;align-items:center;
    font-size:12px;line-height:1;padding:6px 12px;border-radius:999px;
    border:1px solid var(--line);color:var(--neon);background:rgba(200,247,81,.07);
  }
  .badge-coral{border-color:rgba(255,122,69,.35);color:var(--coral);background:rgba(255,122,69,.08)}
  .badge-soft{border-color:var(--line-soft);color:var(--muted);background:rgba(255,255,255,.03)}

  h1{font-size:clamp(30px,5vw,52px);font-weight:800;letter-spacing:-.02em;line-height:1.2}
  h2{font-size:clamp(24px,3vw,32px);font-weight:700;line-height:1.32;letter-spacing:-.01em}
  h3{font-size:clamp(19px,2vw,22px);font-weight:600;line-height:1.45}
  .lead{font-size:17px;color:var(--muted);max-width:720px}
  .meta{font-size:13px;color:var(--muted)}

  /* ---------- header / nav ---------- */
  .site-header{
    position:sticky;top:0;z-index:50;
    background:rgba(11,9,18,.88);
    -webkit-backdrop-filter:blur(12px);
    backdrop-filter:blur(12px);
    border-bottom:1px solid var(--line-soft);
  }
  .site-header::after{
    content:"";position:absolute;left:0;right:0;bottom:0;height:1px;
    background:linear-gradient(90deg,transparent,rgba(200,247,81,.75),transparent);
    pointer-events:none;
  }
  .site-header .bar{display:flex;align-items:center;justify-content:space-between;height:68px;gap:16px}

  .logo{display:inline-flex;align-items:center;gap:12px;min-width:0}
  .logo-mark{
    width:24px;height:24px;border-radius:7px;flex:none;
    background:var(--neon);box-shadow:0 0 18px rgba(200,247,81,.4);
  }
  .logo-text{display:flex;flex-direction:column;line-height:1.15;min-width:0}
  .logo-text b{font-size:16px;font-weight:800;letter-spacing:.01em;white-space:nowrap}
  .logo-text span{font-size:11px;color:var(--muted);letter-spacing:.16em;white-space:nowrap}

  .nav-link{
    position:relative;display:inline-block;
    font-size:15px;color:var(--muted);padding:6px 0;
    transition:color var(--ease);
  }
  .nav-link:hover{color:var(--text)}
  .nav-link.is-active{color:var(--neon);text-shadow:0 0 12px rgba(200,247,81,.45)}
  .nav-link.is-active::after{
    content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;
    background:var(--neon);border-radius:2px;
  }

  /* ---------- buttons ---------- */
  .btn-primary{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    background:var(--neon);color:#0B0912;font-weight:700;font-size:15px;
    padding:12px 24px;border-radius:12px;border:1px solid var(--neon);
    transition:transform var(--ease),box-shadow var(--ease),background var(--ease);
    cursor:pointer;
  }
  .btn-primary:hover{transform:translateY(-2px);box-shadow:var(--glow);background:#d5ff6b}
  .btn-primary:active{transform:translateY(0)}
  .btn-primary[disabled]{opacity:.4;pointer-events:none}
  .btn-ghost{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    background:transparent;color:var(--text);font-weight:600;font-size:15px;
    padding:12px 22px;border-radius:12px;border:1px solid rgba(255,255,255,.18);
    transition:border-color var(--ease),background var(--ease),transform var(--ease);
    cursor:pointer;
  }
  .btn-ghost:hover{border-color:var(--neon);background:rgba(200,247,81,.08);transform:translateY(-2px)}
  .btn-ghost:active{transform:translateY(0)}
  .btn-sm{padding:9px 18px;font-size:14px;border-radius:10px}
  .btn-block{width:100%}

  .text-link{
    display:inline-flex;align-items:center;gap:6px;
    color:var(--neon);font-size:14px;font-weight:600;
    border-bottom:1px solid transparent;transition:border-color var(--ease);
  }
  .text-link::after{content:"→";transition:transform var(--ease)}
  .text-link:hover{border-bottom-color:var(--neon);text-decoration:underline;text-underline-offset:3px}
  .text-link:hover::after{transform:translateX(2px)}

  /* ---------- page head ---------- */
  .page-head{
    position:relative;overflow:hidden;
    padding:64px 0 60px;
    background:
      linear-gradient(180deg,rgba(26,21,36,.94) 0%,rgba(11,9,18,.97) 100%),
      url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
    border-bottom:1px solid var(--line-soft);
  }
  .page-head::before{
    content:"";position:absolute;inset:0;pointer-events:none;opacity:.55;
    background-image:
      linear-gradient(rgba(200,247,81,.06) 1px,transparent 1px),
      linear-gradient(90deg,rgba(200,247,81,.06) 1px,transparent 1px);
    background-size:38px 38px;
  }
  .page-head::after{
    content:"";position:absolute;right:-120px;top:-120px;width:360px;height:360px;border-radius:50%;
    background:radial-gradient(circle,rgba(200,247,81,.14),transparent 70%);pointer-events:none;
  }
  .page-head .wrap{position:relative;z-index:2}
  .head-block{position:relative;padding-left:22px}
  .head-block::before{
    content:"";position:absolute;left:0;top:8px;bottom:8px;width:3px;border-radius:2px;
    background:var(--neon);box-shadow:0 0 18px rgba(200,247,81,.5);
  }
  .head-figure{
    border:1px solid var(--line);border-radius:var(--radius-card);overflow:hidden;
    background:var(--card);box-shadow:var(--shadow);
    aspect-ratio:16/9;
  }
  .head-figure img{width:100%;height:100%;object-fit:cover}

  /* ---------- cards ---------- */
  .card{
    background:var(--card);border:1px solid var(--line);border-radius:var(--radius-card);
    padding:22px;box-shadow:var(--shadow);
    transition:transform var(--ease),border-color var(--ease),box-shadow var(--ease);
  }
  .card:hover,.card:focus-within{transform:translateY(-4px);border-color:rgba(200,247,81,.4);box-shadow:0 14px 40px rgba(0,0,0,.55)}

  .compare-card{
    display:flex;flex-direction:column;
    background:var(--panel);border:1px solid var(--line);border-radius:var(--radius-card);
    padding:26px;box-shadow:var(--shadow);position:relative;overflow:hidden;
    transition:transform var(--ease),border-color var(--ease);
  }
  .compare-card::before{
    content:"";position:absolute;left:0;top:0;height:3px;width:100%;
    background:linear-gradient(90deg,var(--neon),transparent);
  }
  .compare-card.is-alt::before{background:linear-gradient(90deg,var(--coral),transparent)}
  .compare-card:hover{transform:translateY(-4px);border-color:rgba(200,247,81,.4)}
  .compare-list{margin-top:18px;display:flex;flex-direction:column;gap:12px}
  .compare-list li{display:flex;gap:10px;font-size:15.5px;color:var(--muted);line-height:1.75}
  .dot{width:6px;height:6px;border-radius:50%;background:var(--neon);flex:none;margin-top:11px;box-shadow:0 0 10px rgba(200,247,81,.6)}
  .dot-coral{background:var(--coral);box-shadow:0 0 10px rgba(255,122,69,.55)}

  .row-list{border-top:1px solid var(--line-soft)}
  .row-item{
    display:grid;grid-template-columns:1fr;gap:6px;
    padding:20px 16px;border-bottom:1px solid var(--line-soft);
    transition:background var(--ease),color var(--ease);
  }
  @media (min-width:900px){
    .row-item{grid-template-columns:1.05fr 1.3fr auto;align-items:center;gap:24px}
  }
  .row-item:hover{background:rgba(255,255,255,.04)}
  .row-item .row-title{font-size:17px;font-weight:600}
  .row-item .row-desc{font-size:15px;color:var(--muted)}

  /* ---------- faq ---------- */
  .faq-list{display:flex;flex-direction:column;gap:14px}
  .faq-item{
    position:relative;background:var(--panel);border:1px solid var(--line);
    border-radius:12px;overflow:hidden;
    transition:border-color var(--ease);
  }
  .faq-item::before{
    content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--neon);
    transform:scaleY(0);transform-origin:top;transition:transform .22s ease-out;
  }
  .faq-item.is-open{border-color:rgba(200,247,81,.35)}
  .faq-item.is-open::before{transform:scaleY(1)}
  .faq-q{
    width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
    background:none;border:0;text-align:left;cursor:pointer;
    padding:18px 20px;font-size:17px;font-weight:600;color:var(--text);
    transition:color var(--ease);
  }
  .faq-q:hover{color:var(--neon)}
  .faq-plus{
    flex:none;width:22px;height:22px;position:relative;
    transition:transform .22s ease-out;
  }
  .faq-plus::before,.faq-plus::after{
    content:"";position:absolute;background:var(--neon);border-radius:2px;
  }
  .faq-plus::before{left:0;top:10px;width:22px;height:2px}
  .faq-plus::after{left:10px;top:0;width:2px;height:22px}
  .faq-item.is-open .faq-plus{transform:rotate(45deg)}
  .faq-a{
    max-height:0;overflow:hidden;transition:max-height .28s ease-out;
  }
  .faq-a p{padding:0 20px 20px;font-size:16px;color:var(--muted);line-height:1.85;max-width:720px}

  /* ---------- form ---------- */
  .form-field{
    width:100%;background:#0F0C16;border:1px solid var(--line);border-radius:10px;
    padding:12px 16px;font-size:16px;color:var(--text);
    transition:border-color var(--ease),box-shadow var(--ease);
  }
  .form-field::placeholder{color:var(--muted)}
  .form-field:focus{outline:none;border-color:var(--neon);box-shadow:0 0 0 3px rgba(200,247,81,.15)}
  .form-label{display:block;font-size:14px;font-weight:600;margin-bottom:8px}
  .form-note{font-size:13px;color:var(--muted)}
  .form-msg{font-size:13px;color:var(--ok);display:none}
  .form-msg.is-on{display:block}

  /* ---------- cta ---------- */
  .cta-bar{
    background:linear-gradient(120deg,#C8F751 0%,#a9e032 100%);
    color:#0B0912;border-radius:var(--radius-lg);
    padding:32px;display:flex;flex-direction:column;gap:20px;
    box-shadow:0 16px 44px rgba(200,247,81,.16);
  }
  @media (min-width:900px){
    .cta-bar{flex-direction:row;align-items:center;justify-content:space-between;padding:40px 44px;gap:32px}
  }
  .cta-bar h2{color:#0B0912}
  .cta-bar p{color:rgba(11,9,18,.72);font-size:15.5px;max-width:640px}
  .cta-bar .btn-dark{
    display:inline-flex;align-items:center;justify-content:center;
    background:#0B0912;color:var(--neon);font-weight:700;font-size:15px;
    padding:14px 28px;border-radius:12px;border:1px solid #0B0912;white-space:nowrap;
    transition:transform var(--ease),box-shadow var(--ease);
  }
  .cta-bar .btn-dark:hover{transform:translateY(-2px);box-shadow:0 10px 26px rgba(11,9,18,.4)}

  /* ---------- footer ---------- */
  .footer-link{font-size:14px;color:var(--muted);display:inline-block;transition:color var(--ease),transform var(--ease)}
  .footer-link:hover{color:var(--text);transform:translateX(-2px)}

  /* ---------- drawer ---------- */
  .drawer-mask{
    position:fixed;inset:0;background:rgba(0,0,0,.6);z-index:55;
    opacity:0;pointer-events:none;transition:opacity .2s ease-out;
  }
  .drawer-mask.is-open{opacity:1;pointer-events:auto}
  .drawer{
    position:fixed;top:0;right:0;height:100%;width:84%;max-width:360px;z-index:60;
    background:var(--ink-2);border-left:1px solid var(--line);
    transform:translateX(100%);transition:transform .24s ease-out;
    padding:22px;display:flex;flex-direction:column;overflow-y:auto;
  }
  .drawer.is-open{transform:translateX(0)}
  .drawer-link{
    position:relative;display:flex;align-items:center;height:56px;
    font-size:16px;color:var(--muted);border-bottom:1px solid var(--line-soft);
    padding-left:12px;transition:color var(--ease);
  }
  .drawer-link:hover{color:var(--text)}
  .drawer-link.is-active{color:var(--neon)}
  .drawer-link.is-active::before{
    content:"";position:absolute;left:0;top:14px;bottom:14px;width:3px;border-radius:2px;background:var(--neon);
  }

  .reveal{opacity:0;transform:translateY(12px);transition:opacity .38s ease-out,transform .38s ease-out}
  .reveal.is-in{opacity:1;transform:none}
  @media (prefers-reduced-motion:reduce){
    .reveal{opacity:1;transform:none;transition:none}
    html{scroll-behavior:auto}
    *{transition-duration:.01ms !important}
  }

/* roulang page: category2 */
:root{
    --ink:#0B0912;
    --ink-2:#14101D;
    --panel:#1A1524;
    --card:#16121F;
    --line:rgba(200,247,81,.14);
    --line-soft:rgba(255,255,255,.08);
    --neon:#C8F751;
    --coral:#FF7A45;
    --text:#EEEBF6;
    --muted:#A29CB8;
    --ok:#4ADE80;
    --warn:#FBBF24;
    --radius:16px;
    --radius-lg:24px;
    --shadow:0 8px 30px rgba(0,0,0,.45);
    --glow:0 0 0 1px rgba(200,247,81,.5), 0 8px 24px rgba(200,247,81,.18);
    --ease:180ms ease-out;
    --font:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  }

  *,*::before,*::after{box-sizing:border-box}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
  body{
    margin:0;
    background:var(--ink);
    color:var(--text);
    font-family:var(--font);
    font-size:17px;
    line-height:1.85;
    font-variant-numeric:tabular-nums;
    -webkit-font-smoothing:antialiased;
    overflow-x:hidden;
  }
  img{max-width:100%;display:block;height:auto}
  a{color:inherit;text-decoration:none}
  button,input{font:inherit;color:inherit}
  h1,h2,h3,h4{margin:0;letter-spacing:-.01em}
  p{margin:0}
  ul,ol{margin:0;padding:0;list-style:none}
  :focus-visible{outline:2px solid var(--neon);outline-offset:2px;border-radius:4px}

  .skip{
    position:absolute;left:-9999px;top:0;z-index:99;
    background:var(--neon);color:var(--ink);padding:10px 16px;border-radius:0 0 12px 0;font-weight:700;
  }
  .skip:focus{left:0}

  .wrap{width:100%;max-width:1200px;margin:0 auto;padding-left:16px;padding-right:16px}
  @media(min-width:768px){.wrap{padding-left:24px;padding-right:24px}}
  @media(min-width:1024px){.wrap{padding-left:32px;padding-right:32px}}

  .sec{padding:56px 0}
  @media(min-width:768px){.sec{padding:76px 0}}
  @media(min-width:1024px){.sec{padding:96px 0}}

  .hairline{height:1px;background:linear-gradient(90deg,transparent,rgba(200,247,81,.6),transparent)}

  /* ---------- header ---------- */
  .site-header{
    position:sticky;top:0;z-index:50;
    background:rgba(11,9,18,.88);
    backdrop-filter:blur(14px);
    -webkit-backdrop-filter:blur(14px);
  }
  .site-header::after{
    content:'';position:absolute;left:0;right:0;bottom:0;height:1px;
    background:linear-gradient(90deg,transparent,rgba(200,247,81,.75),transparent);
  }
  .header-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:68px}
  .logo{display:flex;align-items:center;gap:12px;flex:none}
  .logo-mark{
    width:24px;height:24px;border-radius:7px;flex:none;
    background:var(--neon);box-shadow:0 0 18px rgba(200,247,81,.45);
  }
  .logo-text{display:block;font-size:16px;font-weight:800;letter-spacing:-.01em;line-height:1.3}
  .logo-sub{display:block;font-size:11px;color:var(--muted);letter-spacing:.1em;line-height:1.4}

  .nav-link{
    position:relative;display:inline-block;
    font-size:15px;color:var(--muted);padding:6px 0;
    transition:color var(--ease);
  }
  .nav-link:hover{color:var(--text)}
  .nav-link.is-active{color:var(--neon);text-shadow:0 0 12px rgba(200,247,81,.45)}
  .nav-link.is-active::after{
    content:'';position:absolute;left:0;right:0;bottom:-8px;height:2px;
    background:var(--neon);border-radius:2px;
  }
  .header-actions{display:flex;align-items:center;gap:12px;flex:none}

  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    padding:12px 24px;border-radius:12px;font-size:15px;font-weight:700;
    border:1px solid transparent;cursor:pointer;white-space:nowrap;
    transition:transform var(--ease),box-shadow var(--ease),background var(--ease),border-color var(--ease),color var(--ease);
  }
  .btn-sm{padding:9px 18px;font-size:14px;border-radius:10px}
  .btn-primary{background:var(--neon);color:var(--ink)}
  .btn-primary:hover{background:#D8FF74;transform:translateY(-2px);box-shadow:var(--glow)}
  .btn-primary:active{transform:translateY(1px)}
  .btn-ghost{background:transparent;border-color:rgba(255,255,255,.18);color:var(--text)}
  .btn-ghost:hover{border-color:var(--neon);background:rgba(200,247,81,.08);transform:translateY(-2px)}
  .btn-ghost:active{transform:translateY(1px)}
  .btn[disabled],.btn.is-disabled{opacity:.4;pointer-events:none}

  .hamburger{
    display:inline-flex;align-items:center;justify-content:center;
    width:42px;height:42px;border-radius:12px;
    background:transparent;border:1px solid rgba(255,255,255,.18);cursor:pointer;
    transition:border-color var(--ease),background var(--ease);
  }
  .hamburger:hover{border-color:var(--neon);background:rgba(200,247,81,.08)}
  .hamburger span{display:block;width:18px;height:2px;background:var(--text);border-radius:2px;position:relative}
  .hamburger span::before,.hamburger span::after{
    content:'';position:absolute;left:0;width:18px;height:2px;background:var(--text);border-radius:2px;
  }
  .hamburger span::before{top:-6px}
  .hamburger span::after{top:6px}

  @media(max-width:1023px){
    .site-header nav[aria-label="主导航"]{display:none}
  }
  @media(min-width:1024px){
    .site-header nav[aria-label="主导航"]{display:flex;align-items:center;gap:28px}
    .hamburger{display:none}
  }

  /* ---------- drawer ---------- */
  .drawer-mask{
    position:fixed;inset:0;background:rgba(0,0,0,.6);z-index:60;
    opacity:0;visibility:hidden;transition:opacity 220ms ease,visibility 220ms ease;
  }
  .drawer-mask.is-open{opacity:1;visibility:visible}
  .drawer{
    position:fixed;top:0;right:0;height:100%;width:84%;max-width:360px;z-index:70;
    background:var(--ink-2);border-left:1px solid var(--line);
    padding:24px 20px;display:flex;flex-direction:column;gap:8px;
    transform:translateX(102%);transition:transform 260ms ease-out;
  }
  .drawer.is-open{transform:translateX(0)}
  .drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}
  .drawer-close{
    width:38px;height:38px;border-radius:10px;background:transparent;
    border:1px solid rgba(255,255,255,.18);cursor:pointer;font-size:20px;line-height:1;
    transition:border-color var(--ease),color var(--ease);
  }
  .drawer-close:hover{border-color:var(--neon);color:var(--neon)}
  .drawer-link{
    display:flex;align-items:center;height:56px;padding-left:14px;
    font-size:16px;color:var(--muted);border-bottom:1px solid var(--line-soft);
    border-left:3px solid transparent;transition:color var(--ease),border-color var(--ease),background var(--ease);
  }
  .drawer-link:hover{color:var(--text);background:rgba(255,255,255,.03)}
  .drawer-link.is-active{color:var(--neon);border-left-color:var(--neon)}
  .drawer-cta{margin-top:auto;width:100%}

  /* ---------- page head ---------- */
  .page-head{position:relative;overflow:hidden;background:var(--panel);border-bottom:1px solid var(--line-soft)}
  .page-head-bg{
    position:absolute;inset:0;
    background-image:url('/assets/images/backpic/back-2.webp');
    background-size:cover;background-position:center;
    opacity:.24;
  }
  .page-head-mask{
    position:absolute;inset:0;
    background:linear-gradient(90deg,rgba(26,21,36,.97),rgba(26,21,36,.78) 55%,rgba(26,21,36,.6));
  }
  .page-head-grid{
    position:absolute;inset:0;opacity:.6;
    background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),
                     linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
    background-size:36px 36px;
  }
  .page-head-inner{
    position:relative;display:grid;gap:32px;align-items:center;
    padding-top:56px;padding-bottom:56px;
  }
  @media(min-width:1024px){
    .page-head-inner{grid-template-columns:1.35fr 1fr;padding-top:68px;padding-bottom:68px;min-height:300px}
  }
  .head-bar{width:56px;height:4px;border-radius:4px;background:var(--neon);box-shadow:0 0 18px rgba(200,247,81,.45)}
  .head-title{margin-top:22px;font-size:clamp(30px,5vw,44px);font-weight:800;line-height:1.2;letter-spacing:-.02em}
  .head-kicker{display:block;font-size:14px;font-weight:600;color:var(--neon);letter-spacing:.14em;margin-bottom:10px}
  .head-lead{margin-top:18px;color:var(--muted);font-size:16px;max-width:640px}
  .head-meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}
  .badge{
    display:inline-flex;align-items:center;gap:6px;
    padding:5px 12px;border-radius:999px;font-size:12px;line-height:1.6;
    border:1px solid var(--line);color:var(--neon);background:rgba(200,247,81,.06);
  }
  .badge-soft{border-color:var(--line-soft);color:var(--muted);background:rgba(255,255,255,.03)}
  .head-figure{
    border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:var(--card);
    box-shadow:var(--shadow);aspect-ratio:16/9;
  }
  .head-figure img{width:100%;height:100%;object-fit:cover}

  /* ---------- section head ---------- */
  .sec-head{max-width:760px}
  .eyebrow{display:inline-flex;align-items:center;gap:10px;font-size:13px;color:var(--neon);letter-spacing:.08em}
  .eyebrow::before{content:'';width:20px;height:1px;background:var(--neon);opacity:.7}
  .sec-title{margin-top:14px;font-size:clamp(24px,3.4vw,34px);font-weight:700;line-height:1.32}
  .sec-desc{margin-top:14px;color:var(--muted);font-size:16px;max-width:720px}

  /* ---------- steps ---------- */
  .steps{position:relative;display:grid;gap:20px;grid-template-columns:1fr;margin-top:44px}
  @media(min-width:768px){.steps{grid-template-columns:repeat(2,1fr)}}
  @media(min-width:1024px){
    .steps{grid-template-columns:repeat(4,1fr)}
    .steps::before{
      content:'';position:absolute;top:52px;left:7%;right:7%;
      border-top:1px dashed rgba(200,247,81,.32);z-index:0;
    }
  }
  .step{
    position:relative;z-index:1;background:var(--card);border:1px solid var(--line);
    border-radius:var(--radius);padding:24px 22px;
    transition:transform var(--ease),border-color var(--ease),box-shadow var(--ease);
  }
  .step:hover,.step:focus-within{transform:translateY(-4px);border-color:rgba(200,247,81,.4);box-shadow:var(--shadow)}
  .step-num{
    font-size:38px;font-weight:800;line-height:1;letter-spacing:.02em;
    color:transparent;-webkit-text-stroke:1px rgba(200,247,81,.65);
  }
  @supports not (-webkit-text-stroke:1px #000){.step-num{color:rgba(200,247,81,.7)}}
  .step-title{margin-top:16px;font-size:18px;font-weight:600}
  .step-text{margin-top:10px;color:var(--muted);font-size:15px;line-height:1.8}

  /* ---------- timeline ---------- */
  .tl{position:relative;margin-top:48px}
  .tl::before{
    content:'';position:absolute;top:10px;bottom:10px;left:7px;width:2px;
    background:linear-gradient(180deg,rgba(200,247,81,.55),rgba(200,247,81,.06));
  }
  .tl-item{position:relative;padding-left:38px;padding-bottom:26px}
  .tl-item::after{
    content:'';position:absolute;left:0;top:26px;width:16px;height:16px;border-radius:50%;
    background:var(--panel);border:2px solid rgba(200,247,81,.5);
  }
  .tl-item.is-on::after{background:var(--neon);border-color:var(--neon);box-shadow:0 0 16px rgba(200,247,81,.55)}
  .tl-card{
    background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
    padding:22px;transition:transform var(--ease),border-color var(--ease),box-shadow var(--ease);
  }
  .tl-card:hover,.tl-card:focus-within{transform:translateY(-4px);border-color:rgba(200,247,81,.4);box-shadow:var(--shadow)}
  .tl-step{font-size:13px;color:var(--neon);letter-spacing:.12em}
  .tl-title{margin-top:8px;font-size:19px;font-weight:600}
  .tl-text{margin-top:10px;color:var(--muted);font-size:15px;line-height:1.8}
  @media(min-width:1024px){
    .tl::before{left:50%;transform:translateX(-1px)}
    .tl-item{display:grid;grid-template-columns:1fr 1fr;gap:64px;padding-left:0;padding-bottom:34px}
    .tl-item::after{left:50%;transform:translateX(-8px);top:30px}
    .tl-card{grid-column:1;grid-row:1}
    .tl-item.is-right .tl-card{grid-column:2}
  }

  /* ---------- survey list ---------- */
  .survey{margin-top:36px}
  @media(min-width:768px){.survey{display:grid;grid-template-columns:1fr 1fr;column-gap:48px}}
  .survey-item{
    padding:18px 12px;margin:0 -12px;border-bottom:1px solid var(--line-soft);
    transition:background var(--ease);
  }
  .survey-item:hover,.survey-item:focus-within{background:rgba(255,255,255,.04)}
  .survey-item h3{font-size:17px;font-weight:600}
  .survey-item p{margin-top:6px;color:var(--muted);font-size:15px;line-height:1.78}

  /* ---------- checks ---------- */
  .checks{display:grid;gap:14px;margin-top:36px}
  @media(min-width:768px){.checks{grid-template-columns:1fr 1fr;gap:16px 24px}}
  .check{
    display:flex;gap:12px;padding:18px 20px;background:var(--card);
    border:1px solid var(--line);border-radius:var(--radius);
    transition:border-color var(--ease),transform var(--ease);
  }
  .check:hover{border-color:rgba(200,247,81,.35);transform:translateY(-3px)}
  .check-dot{
    width:10px;height:10px;border-radius:50%;background:var(--neon);flex:none;margin-top:11px;
    box-shadow:0 0 10px rgba(200,247,81,.6);
  }
  .check strong{display:block;font-size:16px;font-weight:600}
  .check span{color:var(--muted);font-size:15px;line-height:1.78}

  /* ---------- CTA ---------- */
  .cta-band{
    position:relative;overflow:hidden;
    background:var(--panel);border:1px solid var(--line);border-radius:var(--radius-lg);
    padding:32px 24px;display:flex;flex-direction:column;gap:22px;
    box-shadow:var(--shadow);
  }
  .cta-band::before{
    content:'';position:absolute;left:0;top:24px;bottom:24px;width:3px;border-radius:3px;
    background:linear-gradient(180deg,var(--neon),rgba(200,247,81,.1));
  }
  @media(min-width:768px){
    .cta-band{flex-direction:row;align-items:center;justify-content:space-between;padding:40px 44px;gap:40px}
  }
  .cta-title{font-size:clamp(21px,2.6vw,27px);font-weight:700;line-height:1.35}
  .cta-text{margin-top:10px;color:var(--muted);font-size:15px;max-width:560px}
  .cta-actions{display:flex;flex-wrap:wrap;gap:12px}
  @media(max-width:767px){.cta-actions .btn{width:100%}}

  .related-line{
    margin-top:28px;display:flex;flex-wrap:wrap;align-items:center;gap:10px;
    font-size:15px;color:var(--muted);
  }
  .text-link{
    color:var(--neon);text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px;
    transition:opacity var(--ease);
  }
  .text-link:hover{opacity:.85}
  .text-link .arrow{display:inline-block;transition:transform var(--ease)}
  .text-link:hover .arrow{transform:translateX(2px)}

  /* ---------- footer ---------- */
  .footer-link{
    display:inline-block;color:var(--muted);font-size:14px;
    transition:color var(--ease),transform var(--ease);
  }
  .footer-link:hover{color:var(--text);transform:translateX(2px)}
  footer h3{margin:0}
  footer p{margin:0}
  footer .mt-4{margin-top:16px}
  footer .mt-5{margin-top:20px}
  footer .mt-12{margin-top:48px}
  footer .pt-6{padding-top:24px}
  footer .space-y-3>li+li{margin-top:12px}

  /* ---------- reveal ---------- */
  .reveal{opacity:0;transform:translateY(12px);transition:opacity .4s ease-out,transform .4s ease-out}
  .reveal.is-in{opacity:1;transform:none}
  @media(prefers-reduced-motion:reduce){
    .reveal{opacity:1;transform:none;transition:none}
    html{scroll-behavior:auto}
  }