/* roulang page: index */
:root{
    --brand:#FF5A1F;
    --brand-soft:#FFF1E7;
    --accent:#0FA37F;
    --signal:#FFC53D;
    --ink:#14110D;
    --cream:#FBF7F2;
    --line:#EFE6DC;
    --text:#2A2622;
    --muted:#6B6259;
    --grad:linear-gradient(120deg,#FF5A1F 0%,#FF8A3D 55%,#FFC53D 100%);
    --grad-accent:linear-gradient(120deg,#0FA37F 0%,#14C39A 100%);
    --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(--cream);
    color:var(--text);
    font-family:'Noto Sans SC','PingFang SC','Microsoft YaHei',system-ui,sans-serif;
    font-size:17px;
    line-height:1.85;
    -webkit-font-smoothing:antialiased;
  }
  h1,h2,h3,h4{margin:0;color:#1B1713;font-weight:700;line-height:1.3}
  p{margin:0}
  ul{margin:0;padding:0;list-style:none}
  img{display:block;max-width:100%}
  a{color:inherit;text-decoration:none;transition:color .2s var(--ease)}
  button{font:inherit;background:none;border:0;cursor:pointer;color:inherit}
  :focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:8px}
  ::selection{background:#FFD9C4;color:#5A1F00}
  ::-webkit-scrollbar{width:10px;height:10px}
  ::-webkit-scrollbar-track{background:#F5EFE8}
  ::-webkit-scrollbar-thumb{background:#E0D2C2;border-radius:999px}
  ::-webkit-scrollbar-thumb:hover{background:#CDBAA5}

  .container-site{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
  @media (min-width:768px){.container-site{padding:0 24px}}

  .sec{padding:64px 0}
  @media (min-width:768px){.sec{padding:88px 0}}
  @media (min-width:1024px){.sec{padding:112px 0}}
  .sec-tight{padding:56px 0}
  @media (min-width:768px){.sec-tight{padding:72px 0}}

  .grad-brand{background:var(--grad)}
  .grad-accent{background:var(--grad-accent)}
  .text-grad{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}

  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    min-height:48px;padding:12px 26px;border-radius:999px;
    font-size:16px;font-weight:600;line-height:1.2;
    border:1px solid transparent;cursor:pointer;
    transition:transform .22s var(--ease),box-shadow .22s var(--ease),background-color .22s var(--ease),filter .22s var(--ease),color .22s var(--ease);
  }
  .btn-primary{background:var(--grad);color:#fff;box-shadow:0 10px 26px -14px rgba(255,90,31,.75)}
  .btn-primary:hover{filter:brightness(.95);transform:translateY(-2px);box-shadow:0 18px 36px -16px rgba(255,90,31,.8)}
  .btn-primary:active{transform:translateY(1px)}
  .btn-ghost{background:#fff;color:var(--brand);border-color:var(--brand)}
  .btn-ghost:hover{background:var(--brand-soft);transform:translateY(-2px)}
  .btn-ghost:active{transform:translateY(1px)}
  .btn-white{background:#fff;color:var(--brand);box-shadow:0 10px 26px -16px rgba(20,17,13,.4)}
  .btn-white:hover{background:#FFF4EC;transform:translateY(-2px)}
  .btn-outline-white{background:transparent;color:#fff;border:1.5px solid rgba(255,255,255,.85)}
  .btn-outline-white:hover{background:rgba(255,255,255,.16)}
  .btn-sm{min-height:44px;padding:10px 20px;font-size:15px}
  .btn:disabled,.btn[disabled]{background:#E6DCD2;color:#9B9088;box-shadow:none;cursor:not-allowed;transform:none}

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

  .chip{
    display:inline-flex;align-items:center;gap:6px;
    min-height:38px;padding:7px 15px;border-radius:999px;
    font-size:13.5px;color:#4A423B;white-space:nowrap;
    transition:background-color .2s var(--ease),color .2s var(--ease),box-shadow .2s var(--ease);
  }
  .chip:hover{background:#EFE6DC}
  .chip-active{background:var(--grad);color:#fff;box-shadow:inset 0 1px 3px rgba(0,0,0,.15)}
  .chip-active:hover{background:var(--grad)}

  .tag{
    display:inline-flex;align-items:center;gap:6px;
    padding:5px 12px;border-radius:999px;
    font-size:12.5px;font-weight:600;line-height:1.4;
  }
  .tag-brand{background:var(--brand-soft);color:var(--brand);border:1px solid rgba(255,90,31,.22)}
  .tag-accent{background:var(--accentSoft);color:#0B7C60;border:1px solid rgba(15,163,127,.24)}
  .tag-signal{background:#FFF6DD;color:#8A6200;border:1px solid rgba(255,197,61,.5)}
  .tag-gray{background:#F5EFE8;color:var(--muted);border:1px solid var(--line)}

  .card{
    background:#fff;border:1px solid var(--line);border-radius:16px;
    transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
  }
  .card:hover{transform:translateY(-4px);box-shadow:0 16px 40px -18px rgba(255,90,31,.3);border-color:rgba(255,90,31,.24)}

  .num{font-family:'DIN Alternate','Roboto Mono',ui-monospace,monospace;font-variant-numeric:tabular-nums}

  .badge-stat{
    display:inline-flex;align-items:center;gap:10px;
    background:#fff;border:1px solid rgba(255,90,31,.35);border-radius:999px;
    padding:8px 18px;min-height:52px;
    transition:transform .2s var(--ease),box-shadow .2s var(--ease);
  }
  .badge-stat:hover{transform:translateY(-2px);box-shadow:0 12px 26px -16px rgba(255,90,31,.5)}

  .hero-glow{position:absolute;inset:0;overflow:hidden;pointer-events:none}
  .hero-glow::after{
    content:'';position:absolute;right:-10%;top:-32%;width:660px;height:660px;border-radius:50%;
    background:radial-gradient(circle,rgba(255,138,61,.34),rgba(255,197,61,0) 70%);
  }

  table{border-collapse:separate;border-spacing:0;width:100%}
  th,td{padding:16px 14px;border-bottom:1px solid var(--line);vertical-align:middle}
  tbody tr:last-child td{border-bottom:none}
  tbody tr:nth-child(odd){background:#FDFAF6}
  tbody tr:hover{background:#FFF7F0}
  .cell-yes,.cell-no{display:inline-grid;place-items:center;width:24px;height:24px;border-radius:999px}
  .cell-yes{background:var(--grad-accent);color:#fff;font-size:12px;font-weight:700}
  .cell-no{width:18px;height:3px;border-radius:999px;background:#DFD3C6}

  .line-clamp-2{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
  .line-clamp-3{display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}

  .faq-item{background:#fff;border:1px solid var(--line);border-radius:16px;overflow:hidden;transition:border-color .22s var(--ease),box-shadow .22s var(--ease)}
  .faq-item + .faq-item{margin-top:12px}
  .faq-item:hover{border-color:rgba(255,90,31,.28)}
  .faq-item.faq-open{border-color:rgba(255,90,31,.4);box-shadow:0 12px 30px -22px rgba(255,90,31,.5)}
  .faq-sign{
    width:34px;height:34px;display:grid;place-items:center;flex:0 0 auto;
    border-radius:999px;background:#F5EFE8;color:var(--brand);font-weight:700;font-size:18px;
    transition:transform .24s var(--ease),background .24s var(--ease),color .24s var(--ease);
  }
  .faq-open .faq-sign{transform:rotate(45deg);background:var(--grad);color:#fff}
  .faq-body{max-height:0;overflow:hidden;transition:max-height .3s var(--ease)}
  .faq-open .faq-body{max-height:420px}

  .footer-link{color:#C9C0B7;font-size:14px;display:inline-block;transition:color .2s var(--ease),transform .2s var(--ease)}
  .footer-link:hover{color:#fff;transform:translateX(-2px)}
  .footer-title{font-size:13px;letter-spacing:.08em;color:#8C8279;margin-bottom:14px;font-weight:600}

  .img-ph{background:rgba(255,90,31,.08);display:grid;place-items:center}
  .img-ph svg{opacity:.5}

  @media (max-width:1023px){
    body{font-size:16.5px}
  }

/* roulang page: article */
:root{
    --brand:#FF5A1F;
    --brand-2:#FF8A3D;
    --signal:#FFC53D;
    --accent:#0FA37F;
    --accent-2:#14C39A;
    --ink:#14110D;
    --cream:#FBF7F2;
    --soft:#F5EFE8;
    --line:#EFE6DC;
    --text:#2A2622;
    --muted:#6B6259;
    --radius-card:24px;
    --radius-lg:16px;
    --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;
    font-family:'Noto Sans SC','PingFang SC','Hiragino Sans GB','Microsoft YaHei',sans-serif;
    background:var(--cream);
    color:var(--text);
    font-size:16px;
    line-height:1.85;
    -webkit-font-smoothing:antialiased;
  }
  a{color:inherit;text-decoration:none;}
  img{display:block;max-width:100%;height:auto;}
  button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
  ul,ol{padding-left:0;list-style:none;margin:0;}
  h1,h2,h3,h4,p{margin:0;}
  table{border-collapse:separate;border-spacing:0;}

  :focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:8px;}
  ::selection{background:rgba(255,90,31,.18);}

  ::-webkit-scrollbar{width:10px;height:10px;}
  ::-webkit-scrollbar-track{background:#F2EAE1;}
  ::-webkit-scrollbar-thumb{background:#D9CCBE;border-radius:99px;}
  ::-webkit-scrollbar-thumb:hover{background:#C6B4A2;}

  .container-site{
    width:100%;
    max-width:1200px;
    margin:0 auto;
    padding-left:20px;
    padding-right:20px;
  }
  @media (min-width:768px){
    .container-site{padding-left:24px;padding-right:24px;}
  }

  .grad-brand{background-image:linear-gradient(120deg,#FF5A1F 0%,#FF8A3D 55%,#FFC53D 100%);}
  .grad-accent{background-image:linear-gradient(120deg,#0FA37F 0%,#14C39A 100%);}
  .grad-line{height:2px;background-image:linear-gradient(120deg,#FF5A1F 0%,#FFC53D 100%);}
  .text-grad{
    background-image:linear-gradient(120deg,#FF5A1F 0%,#FF8A3D 55%,#FFC53D 100%);
    -webkit-background-clip:text;background-clip:text;color:transparent;
  }

  /* ---------- chips ---------- */
  .chip{
    display:inline-flex;align-items:center;justify-content:center;
    min-height:38px;padding:0 16px;
    border-radius:999px;
    font-size:14px;font-weight:500;
    color:#4A423B;
    white-space:nowrap;
    transition:background-color .2s var(--ease),color .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease);
  }
  .chip:hover{background-color:#EDE4D9;color:#2A2622;}
  .chip-active{
    background-image:linear-gradient(120deg,#FF5A1F 0%,#FF8A3D 55%,#FFC53D 100%);
    color:#fff;
    box-shadow:inset 0 1px 0 rgba(255,255,255,.35), 0 6px 16px -8px rgba(255,90,31,.6);
  }
  .chip-active:hover{color:#fff;background-color:transparent;}

  .tag-chip{
    display:inline-flex;align-items:center;gap:6px;
    padding:6px 14px;border-radius:999px;
    font-size:13px;color:#4A423B;
    background:#fff;border:1px solid var(--line);
    transition:all .2s var(--ease);
  }
  .tag-chip:hover{border-color:rgba(255,90,31,.45);background:#FFF1E7;color:var(--brand);}
  .tag-brand{background:#FFF1E7;border-color:rgba(255,90,31,.35);color:var(--brand);font-weight:600;}

  /* ---------- buttons ---------- */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    min-height:46px;padding:0 24px;border-radius:999px;
    font-size:15px;font-weight:600;
    transition:transform .2s var(--ease),box-shadow .2s var(--ease),background-color .2s var(--ease),filter .2s var(--ease),color .2s var(--ease);
  }
  .btn-primary{
    background-image:linear-gradient(120deg,#FF5A1F 0%,#FF8A3D 55%,#FFC53D 100%);
    color:#fff;box-shadow:0 1px 2px rgba(20,17,13,.06),0 8px 24px -12px rgba(255,90,31,.5);
  }
  .btn-primary:hover{filter:brightness(.95);transform:translateY(-2px);box-shadow:0 16px 40px -16px rgba(255,90,31,.55);}
  .btn-primary:active{transform:translateY(1px);}
  .btn-secondary{
    background:#fff;color:var(--brand);border:1px solid var(--brand);
  }
  .btn-secondary:hover{background:#FFF1E7;transform:translateY(-2px);}
  .btn-secondary:active{transform:translateY(1px);}
  .btn-onDark{
    background:#fff;color:var(--brand);
  }
  .btn-onDark:hover{transform:translateY(-2px);box-shadow:0 16px 40px -18px rgba(0,0,0,.5);}
  .btn-outlineLight{
    background:transparent;color:#fff;border:1.5px solid rgba(255,255,255,.85);
  }
  .btn-outlineLight:hover{background:rgba(255,255,255,.14);transform:translateY(-2px);}
  .btn-text{
    display:inline-flex;align-items:center;gap:6px;
    color:var(--brand);font-size:14px;font-weight:600;min-height:44px;
    transition:color .2s var(--ease);
  }
  .btn-text svg{transition:transform .2s var(--ease);}
  .btn-text:hover svg{transform:translateX(4px);}
  .btn[disabled],.btn:disabled{background:#E7DED4;color:#9A9088;box-shadow:none;cursor:not-allowed;transform:none;}
  .btn-sm{min-height:40px;padding:0 18px;font-size:14px;}

  /* ---------- card ---------- */
  .card{
    background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);
    transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
  }
  .card-hover:hover{transform:translateY(-4px);box-shadow:0 16px 40px -16px rgba(255,90,31,.28);border-color:rgba(255,90,31,.25);}

  .badge-stat{
    display:inline-flex;align-items:center;gap:10px;
    padding:10px 18px;border-radius:999px;
    background:#fff;border:1px solid rgba(255,90,31,.25);
    transition:transform .2s var(--ease),box-shadow .2s var(--ease);
  }
  .badge-stat:hover{transform:translateY(-2px);box-shadow:0 12px 28px -16px rgba(255,90,31,.4);}
  .badge-num{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-weight:700;font-size:24px;color:var(--brand);line-height:1;}
  .badge-label{font-size:14px;color:var(--muted);}

  .lock-mask{background:linear-gradient(180deg,rgba(20,17,13,.18) 0%,rgba(20,17,13,.78) 100%);}

  /* ---------- article ---------- */
  .article-title{
    font-size:clamp(30px,4.4vw,46px);
    font-weight:800;line-height:1.2;letter-spacing:.2px;color:var(--ink);
  }
  .prose-content{
    max-width:840px;
    font-size:17px;
    line-height:1.9;
    color:#2A2622;
    word-break:break-word;
  }
  .prose-content > *:first-child{margin-top:0;}
  .prose-content p{margin:0 0 1.2em;}
  .prose-content h2{
    position:relative;
    font-size:clamp(22px,2.6vw,26px);
    font-weight:700;line-height:1.45;color:var(--ink);
    margin:2.5em 0 .9em;
    padding-left:16px;
    scroll-margin-top:96px;
  }
  .prose-content h2::before{
    content:"";position:absolute;left:0;top:.22em;bottom:.22em;width:4px;border-radius:4px;
    background-image:linear-gradient(180deg,#FF5A1F 0%,#FFC53D 100%);
  }
  .prose-content h3{
    font-size:20px;font-weight:600;color:var(--ink);
    margin:1.8em 0 .7em;line-height:1.5;
    scroll-margin-top:96px;
  }
  .prose-content h4{font-size:17px;font-weight:600;margin:1.4em 0 .6em;color:var(--ink);}
  .prose-content blockquote{
    margin:1.6em 0;padding:18px 22px;
    background:var(--soft);
    border-left:4px solid var(--brand);
    border-radius:0 16px 16px 0;
    color:#4A423B;
    font-size:16px;
  }
  .prose-content blockquote p:last-child{margin-bottom:0;}
  .prose-content ul,.prose-content ol{margin:0 0 1.2em;padding-left:1.3em;}
  .prose-content ul li{list-style:disc;margin:.5em 0;}
  .prose-content ol li{list-style:decimal;margin:.5em 0;}
  .prose-content img{
    border-radius:16px;margin:1.6em auto;box-shadow:0 1px 2px rgba(20,17,13,.06);
  }
  .prose-content figure{margin:1.6em 0;}
  .prose-content figcaption{
    text-align:center;font-size:13px;color:var(--muted);margin-top:10px;
  }
  .prose-content a{color:var(--brand);border-bottom:1px solid rgba(255,90,31,.35);transition:border-color .2s var(--ease);}
  .prose-content a:hover{border-bottom-color:var(--brand);}
  .prose-content strong{font-weight:700;color:var(--ink);}
  .table-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch;margin:1.6em 0;border-radius:16px;border:1px solid var(--line);}
  .prose-content table{width:100%;min-width:520px;font-size:15px;}
  .prose-content th{
    background:var(--soft);color:var(--ink);font-weight:600;text-align:left;
    padding:14px 18px;border-bottom:1px solid var(--line);white-space:nowrap;
  }
  .prose-content td{padding:14px 18px;border-bottom:1px solid var(--line);vertical-align:top;}
  .prose-content tbody tr:nth-child(odd){background:#FDFAF6;}
  .prose-content tbody tr:last-child td{border-bottom:0;}
  .prose-content hr{border:0;height:1px;background:var(--line);margin:2.4em 0;}

  .toc-link{
    display:block;font-size:13.5px;line-height:1.6;color:var(--muted);
    padding:7px 12px;border-left:2px solid var(--line);
    transition:all .2s var(--ease);
  }
  .toc-link:hover{color:var(--brand);border-left-color:var(--brand);background:#FFF7F1;}
  .toc-link.is-active{color:var(--brand);border-left-color:var(--brand);font-weight:600;background:#FFF7F1;}

  .meta-line{display:flex;flex-wrap:wrap;align-items:center;gap:10px 18px;font-size:14px;color:var(--muted);}
  .meta-dot{width:4px;height:4px;border-radius:99px;background:#D9CCBE;display:inline-block;}

  .crumb-link{transition:color .2s var(--ease);}
  .crumb-link:hover{color:var(--brand);}

  .nav-card{
    display:flex;flex-direction:column;gap:6px;
    background:#fff;border:1px solid var(--line);border-radius:16px;
    padding:20px 22px;
    transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
  }
  .nav-card:hover{transform:translateY(-4px);box-shadow:0 16px 40px -16px rgba(255,90,31,.28);border-color:rgba(255,90,31,.25);}
  .nav-card .nav-card__kicker{font-size:12.5px;color:var(--muted);letter-spacing:.04em;}
  .nav-card .nav-card__title{font-size:16.5px;font-weight:600;color:var(--ink);line-height:1.55;}

  .footer-title{
    font-size:13px;letter-spacing:.08em;color:#8C8279;text-transform:uppercase;
    margin-bottom:18px;font-weight:600;
  }
  .footer-link{
    font-size:14px;color:#C9C0B7;display:inline-block;
    transition:color .2s var(--ease),transform .2s var(--ease);
  }
  .footer-link:hover{color:#fff;transform:translateX(2px);}

  .drawer{max-height:0;overflow:hidden;transition:max-height .28s var(--ease);}
  .drawer.is-open{max-height:520px;}

  .figure-ratio{position:relative;width:100%;overflow:hidden;}
  .figure-ratio img{width:100%;height:100%;object-fit:cover;transition:transform .35s var(--ease);}
  .card-hover:hover .figure-ratio img{transform:scale(1.03);}

  .hero-glow{
    position:absolute;right:-120px;top:-140px;width:520px;height:520px;border-radius:50%;
    background:radial-gradient(circle at center,rgba(255,138,61,.35) 0%,rgba(255,197,61,.14) 45%,rgba(255,197,61,0) 72%);
    pointer-events:none;
  }

  .divider-soft{height:1px;background:var(--line);}

  @media (max-width:1023px){
    .toc-aside{display:none;}
  }
  @media (max-width:639px){
    .prose-content{font-size:16.5px;line-height:1.88;}
    .badge-num{font-size:20px;}
  }

/* roulang page: category1 */
:root{
    --brand:#FF5A1F;
    --brand-2:#FF8A3D;
    --accent:#0FA37F;
    --accent-2:#14C39A;
    --signal:#FFC53D;
    --ink:#14110D;
    --cream:#FBF7F2;
    --layer:#F5EFE8;
    --line:#EFE6DC;
    --text:#2A2622;
    --muted:#6B6259;
    --white:#FFFFFF;
    --radius-card:24px;
    --radius-md:16px;
    --radius-sm:12px;
    --shadow-soft:0 1px 2px rgba(20,17,13,.06), 0 8px 24px -12px rgba(255,90,31,.18);
    --shadow-lift:0 16px 40px -16px rgba(255,90,31,.28);
    --ease:cubic-bezier(.2,.7,.3,1);
  }
  *,*::before,*::after{box-sizing:border-box}
  html{-webkit-text-size-adjust:100%}
  body{
    margin:0;
    background:var(--cream);
    color:var(--text);
    font-family:'Noto Sans SC','PingFang SC','Microsoft YaHei',system-ui,sans-serif;
    font-size:16.5px;
    line-height:1.85;
    -webkit-font-smoothing:antialiased;
  }
  img{max-width:100%;display:block}
  a{color:inherit;text-decoration:none;transition:color .2s var(--ease),background-color .2s var(--ease),transform .2s var(--ease)}
  button{font-family:inherit;cursor:pointer}
  h1,h2,h3,h4{margin:0;color:var(--ink);font-weight:700;line-height:1.25}
  p{margin:0}
  ul{margin:0;padding:0;list-style:none}
  :focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:8px}
  ::selection{background:rgba(255,90,31,.18)}

  .container-site{width:100%;max-width:1200px;margin:0 auto;padding-left:20px;padding-right:20px}
  @media (min-width:768px){.container-site{padding-left:24px;padding-right:24px}}

  .grad-brand{background-image:linear-gradient(120deg,#FF5A1F 0%,#FF8A3D 55%,#FFC53D 100%)}
  .grad-accent{background-image:linear-gradient(120deg,#0FA37F 0%,#14C39A 100%)}
  .text-brand{color:var(--brand)}
  .text-accent{color:var(--accent)}
  .text-muted{color:var(--muted)}
  .bg-ink{background-color:var(--ink)}
  .bg-layer{background-color:var(--layer)}
  .border-line{border-color:var(--line)}

  /* 顶部细条 */
  .topbar{height:34px;background:var(--ink);color:#B9AFA5;font-size:12px;line-height:34px}
  .topbar a{color:#CFC6BC}
  .topbar a:hover{color:#fff}

  /* 导航 chip */
  .chip{
    display:inline-flex;align-items:center;justify-content:center;
    min-height:38px;padding:0 16px;border-radius:999px;
    font-size:14px;color:#4A423B;white-space:nowrap;
    transition:background-color .2s var(--ease),color .2s var(--ease),box-shadow .2s var(--ease);
  }
  .chip:hover{background:rgba(20,17,13,.07);color:var(--ink)}
  .chip-active{
    background-image:linear-gradient(120deg,#FF5A1F 0%,#FF8A3D 55%,#FFC53D 100%);
    color:#fff;
    box-shadow:inset 0 1px 0 rgba(255,255,255,.28),0 6px 16px -8px rgba(255,90,31,.7);
  }
  .chip-active:hover{color:#fff;background:linear-gradient(120deg,#FF5A1F 0%,#FF8A3D 55%,#FFC53D 100%)}

  .tag{
    display:inline-flex;align-items:center;gap:6px;
    height:28px;padding:0 12px;border-radius:999px;
    font-size:12.5px;font-weight:500;
    background:var(--brandsoft);color:#C2410C;
  }
  .tag-accent{background:rgba(15,163,127,.12);color:#0B7C61}
  .tag-soft{background:var(--layer);color:var(--muted)}

  /* 按钮 */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    min-height:46px;padding:0 24px;border-radius:999px;
    font-size:15px;font-weight:600;border:1px solid transparent;
    transition:transform .2s var(--ease),box-shadow .2s var(--ease),background-color .2s var(--ease),filter .2s var(--ease),color .2s var(--ease);
  }
  .btn-primary{
    background-image:linear-gradient(120deg,#FF5A1F 0%,#FF8A3D 55%,#FFC53D 100%);
    color:#fff;box-shadow:0 8px 22px -12px rgba(255,90,31,.8);
  }
  .btn-primary:hover{filter:brightness(.95);transform:translateY(-2px);box-shadow:0 16px 34px -14px rgba(255,90,31,.75)}
  .btn-primary:active{transform:translateY(1px)}
  .btn-ghost{background:#fff;border-color:var(--brand);color:var(--brand)}
  .btn-ghost:hover{background:var(--brandsoft)}
  .btn-dark{background:var(--ink);color:#FFF7EF}
  .btn-dark:hover{transform:translateY(-2px);box-shadow:0 16px 34px -18px rgba(20,17,13,.7)}
  .btn-white{background:#fff;color:var(--brand)}
  .btn-white:hover{transform:translateY(-2px);box-shadow:0 16px 34px -14px rgba(20,17,13,.4)}
  .btn-outline-white{background:transparent;border:1.5px solid rgba(255,255,255,.85);color:#fff}
  .btn-outline-white:hover{background:rgba(255,255,255,.14)}
  .link-arrow{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--brand)}
  .link-arrow span{display:inline-block;transition:transform .2s var(--ease)}
  .link-arrow:hover span{transform:translateX(4px)}

  /* 卡片 */
  .card{
    background:#fff;border:1px solid var(--line);border-radius:var(--radius-md);
    box-shadow:var(--shadow-soft);
    transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
  }
  .card-hover:hover{transform:translateY(-4px);box-shadow:var(--shadow-lift);border-color:rgba(255,90,31,.28)}
  .card-media{overflow:hidden;border-radius:14px;aspect-ratio:16/10;background:rgba(255,90,31,.08)}
  .card-media img{width:100%;height:100%;object-fit:cover;transition:transform .3s var(--ease)}
  .card-hover:hover .card-media img{transform:scale(1.03)}
  .img-fallback{width:100%;height:100%;display:grid;place-items:center;background:rgba(255,90,31,.08);color:var(--brand)}

  /* 数据徽章 */
  .stat-pill{
    display:flex;align-items:center;gap:10px;
    background:#fff;border:1px solid rgba(255,90,31,.28);border-radius:999px;
    padding:8px 16px 8px 10px;
    transition:transform .2s var(--ease),box-shadow .2s var(--ease);
  }
  .stat-pill:hover{transform:translateY(-2px);box-shadow:var(--shadow-soft)}
  .stat-num{font-family:'ui-monospace',Menlo,monospace;font-size:22px;font-weight:700;color:var(--brand);line-height:1}
  .stat-label{font-size:12.5px;color:var(--muted)}

  /* 侧栏 */
  .sidebar-sticky{position:sticky;top:96px}

  /* FAQ */
  .faq-item{background:#fff;border:1px solid var(--line);border-radius:var(--radius-md);overflow:hidden;transition:box-shadow .22s var(--ease),border-color .22s var(--ease)}
  .faq-item.is-open{border-color:rgba(255,90,31,.35);box-shadow:var(--shadow-soft)}
  .faq-q{
    width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
    background:transparent;border:0;padding:18px 20px;text-align:left;
    font-size:17px;font-weight:600;color:var(--ink);
  }
  .faq-icon{
    flex:0 0 auto;width:30px;height:30px;border-radius:999px;display:grid;place-items:center;
    border:1px solid var(--line);color:var(--brand);font-size:17px;line-height:1;
    transition:transform .25s var(--ease),background-color .25s var(--ease),color .25s var(--ease),border-color .25s var(--ease);
  }
  .faq-item.is-open .faq-icon{
    background-image:linear-gradient(120deg,#FF5A1F 0%,#FF8A3D 55%,#FFC53D 100%);
    color:#fff;border-color:transparent;transform:rotate(45deg);
  }
  .faq-a{max-height:0;overflow:hidden;transition:max-height .3s var(--ease)}
  .faq-a p{padding:0 20px 20px;font-size:15px;line-height:1.8;color:var(--muted)}

  /* 页脚 */
  .footer-title{font-size:13px;letter-spacing:.08em;color:#8C8279;margin-bottom:18px;font-weight:600}
  .footer-link{font-size:14px;color:#C9C0B7;display:inline-block}
  .footer-link:hover{color:#fff;transform:translateX(-2px)}

  /* 面包屑 */
  .crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--muted)}
  .crumb a{color:var(--muted)}
  .crumb a:hover{color:var(--brand)}
  .crumb .sep{color:#C7BCB1}

  /* 抽屉 */
  .drawer{
    position:fixed;inset:0 0 0 auto;width:min(86vw,360px);background:#fff;z-index:80;
    transform:translateX(102%);transition:transform .28s var(--ease);
    display:flex;flex-direction:column;padding:20px;overflow-y:auto;
    box-shadow:-20px 0 50px -30px rgba(20,17,13,.6);
  }
  .drawer.is-open{transform:translateX(0)}
  .drawer-mask{position:fixed;inset:0;background:rgba(20,17,13,.45);z-index:70;opacity:0;visibility:hidden;transition:opacity .28s var(--ease),visibility .28s}
  .drawer-mask.is-open{opacity:1;visibility:visible}

  /* 区块间距 */
  .section{padding-top:64px;padding-bottom:64px}
  @media (min-width:768px){.section{padding-top:88px;padding-bottom:88px}}
  @media (min-width:1024px){.section{padding-top:104px;padding-bottom:104px}}

  .h1-title{font-size:clamp(30px,5vw,52px);font-weight:800;line-height:1.15;letter-spacing:-.01em}
  .h2-title{font-size:clamp(24px,3.4vw,34px);font-weight:700;line-height:1.25}
  .h3-title{font-size:20px;font-weight:600;line-height:1.4}

  .clamp-2{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
  .clamp-3{display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}

  ::-webkit-scrollbar{width:10px;height:10px}
  ::-webkit-scrollbar-thumb{background:#DCCFC2;border-radius:999px;border:3px solid var(--cream)}
  ::-webkit-scrollbar-thumb:hover{background:#C9B7A6}

/* roulang page: category2 */
:root{
  --brand:#FF5A1F;
  --brand-2:#FF8A3D;
  --signal:#FFC53D;
  --accent:#0FA37F;
  --accent-2:#14C39A;
  --ink:#14110D;
  --cream:#FBF7F2;
  --sand:#F5EFE8;
  --line:#EFE6DC;
  --text:#2A2622;
  --muted:#6B6259;
  --paper:#FFF7EF;
  --r-card:24px;
  --r-lg:16px;
  --r-sm:12px;
  --sh-soft:0 1px 2px rgba(20,17,13,.06), 0 8px 24px -12px rgba(255,90,31,.18);
  --sh-lift:0 16px 40px -16px rgba(255,90,31,.28);
  --ease:cubic-bezier(.2,.7,.3,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--cream);
  color:var(--text);
  font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  font-size:16.5px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
h1,h2,h3,h4,p,ul,ol,dl,dd,dt,figure{margin:0}
ul,ol{padding:0;list-style:none}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px}
::selection{background:rgba(255,90,31,.2)}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-track{background:#F3ECE4}
::-webkit-scrollbar-thumb{background:#E0D3C6;border-radius:999px;border:2px solid #F3ECE4}
::-webkit-scrollbar-thumb:hover{background:#CDBCAB}

.container-site{width:100%;max-width:1200px;margin:0 auto;padding-left:20px;padding-right:20px}
@media (min-width:768px){.container-site{padding-left:24px;padding-right:24px}}

.sec{padding-block:64px}
@media (min-width:768px){.sec{padding-block:88px}}
@media (min-width:1024px){.sec{padding-block:112px}}
.sec-tight{padding-block:48px}
@media (min-width:768px){.sec-tight{padding-block:64px}}
@media (min-width:1024px){.sec-tight{padding-block:80px}}

.grad-brand{background-image:linear-gradient(120deg,#FF5A1F 0%,#FF8A3D 55%,#FFC53D 100%)}
.grad-accent{background-image:linear-gradient(120deg,#0FA37F 0%,#14C39A 100%)}
.txt-grad{background-image:linear-gradient(120deg,#FF5A1F 0%,#FF8A3D 55%,#FFC53D 100%);-webkit-background-clip:text;background-clip:text;color:transparent}

.h1{font-size:clamp(32px,5vw,52px);font-weight:800;line-height:1.15;letter-spacing:-.01em;color:var(--ink)}
.h2{font-size:clamp(26px,3.4vw,34px);font-weight:700;line-height:1.25;color:var(--ink)}
.h3{font-size:21px;font-weight:600;line-height:1.45;color:var(--ink)}
.lead{font-size:16.5px;line-height:1.85;color:var(--muted)}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:999px;
  background:var(--sand);color:#8A5A2B;
  font-size:12.5px;font-weight:700;letter-spacing:.08em;
}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:999px;background-image:linear-gradient(120deg,#FF5A1F,#FFC53D)}

.chip{
  display:inline-flex;align-items:center;justify-content:center;
  min-height:44px;padding:0 14px;border-radius:999px;
  font-size:13.5px;font-weight:600;color:#4A423B;white-space:nowrap;
  transition:background-color .22s var(--ease),color .22s var(--ease),box-shadow .22s var(--ease),transform .22s var(--ease);
}
.chip:hover{background:#EAE0D5;color:var(--ink)}
.chip:active{transform:translateY(1px)}
.chip-active{background-image:linear-gradient(120deg,#FF5A1F 0%,#FF8A3D 55%,#FFC53D 100%);color:#fff;box-shadow:inset 0 1px 0 rgba(255,255,255,.28),0 8px 18px -10px rgba(255,90,31,.6)}
.chip-active:hover{background-image:linear-gradient(120deg,#FF5A1F 0%,#FF8A3D 55%,#FFC53D 100%);color:#fff}
.chip-soft{background:#fff;border:1px solid var(--line);color:#4A423B;font-weight:600}
.chip-soft:hover{background:var(--brandSoft);border-color:rgba(255,90,31,.35);color:var(--brand)}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:50px;padding:0 26px;border-radius:999px;
  font-size:15.5px;font-weight:700;line-height:1;
  transition:transform .2s var(--ease),box-shadow .22s var(--ease),background-color .22s var(--ease),filter .22s var(--ease),color .22s var(--ease);
}
.btn-primary{
  background-image:linear-gradient(120deg,#FF5A1F 0%,#FF8A3D 55%,#FFC53D 100%);
  color:#fff;box-shadow:0 12px 26px -14px rgba(255,90,31,.75);
}
.btn-primary:hover{filter:brightness(.95);transform:translateY(-2px);box-shadow:0 20px 36px -16px rgba(255,90,31,.8)}
.btn-primary:active{transform:translateY(1px)}
.btn-outline{background:#fff;border:1.5px solid rgba(255,90,31,.55);color:var(--brand)}
.btn-outline:hover{background:var(--brandSoft);transform:translateY(-2px)}
.btn-outline:active{transform:translateY(1px)}
.btn-white{background:#fff;color:var(--brand);box-shadow:0 12px 30px -16px rgba(0,0,0,.5)}
.btn-white:hover{transform:translateY(-2px);box-shadow:0 20px 40px -18px rgba(0,0,0,.55)}
.btn-ghost-white{background:transparent;border:1.5px solid rgba(255,255,255,.72);color:#fff}
.btn-ghost-white:hover{background:rgba(255,255,255,.14);transform:translateY(-2px)}
.btn-sm{min-height:44px;padding:0 20px;font-size:15px}
.btn[disabled]{background:#DED5CB;color:#8B8178;box-shadow:none;cursor:not-allowed;transform:none}

.link-arrow{display:inline-flex;align-items:center;gap:6px;font-weight:700;color:var(--brand);transition:color .2s var(--ease)}
.link-arrow svg{transition:transform .22s var(--ease)}
.link-arrow:hover svg{transform:translateX(4px)}
.link-arrow-light{color:#fff}

.card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:var(--sh-soft);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.card-hover:hover{transform:translateY(-4px);box-shadow:var(--sh-lift);border-color:rgba(255,90,31,.22)}

.img-wrap{position:relative;overflow:hidden;background:rgba(255,90,31,.08)}
.img-cover{width:100%;height:100%;object-fit:cover;display:block}
.img-ph{position:absolute;inset:0;display:grid;place-items:center;color:rgba(255,90,31,.6);background:rgba(255,90,31,.08)}
.ratio-16-10{aspect-ratio:16/10}
.ratio-21-9{aspect-ratio:21/9}
.is-hidden{display:none !important}

.badge-stat{
  display:inline-flex;align-items:center;gap:8px;
  min-height:52px;padding:0 16px;border-radius:999px;
  background:#fff;border:1px solid rgba(255,90,31,.28);
  box-shadow:var(--sh-soft);
  transition:transform .2s var(--ease),box-shadow .22s var(--ease);
}
.badge-stat:hover{transform:translateY(-2px);box-shadow:var(--sh-lift)}
.badge-num{font-family:"DIN Alternate",ui-monospace,monospace;font-size:24px;font-weight:800;color:var(--brand);line-height:1}
.badge-text{font-size:13.5px;color:var(--muted);font-weight:600;white-space:nowrap}

.check-li{display:flex;gap:10px;align-items:flex-start;font-size:15px;line-height:1.7;color:var(--text)}
.check-ico{
  flex:0 0 auto;width:20px;height:20px;border-radius:999px;margin-top:3px;
  background-image:linear-gradient(120deg,#0FA37F,#14C39A);
  display:grid;place-items:center;
}
.check-ico svg{width:12px;height:12px}

.tl-item{position:relative;padding-left:60px;padding-bottom:26px}
.tl-item:last-child{padding-bottom:0}
.tl-item::before{
  content:"";position:absolute;left:19px;top:46px;bottom:-6px;width:2px;
  background:linear-gradient(180deg,rgba(255,90,31,.38),rgba(255,197,61,.12));
}
.tl-item:last-child::before{display:none}
.tl-dot{
  position:absolute;left:0;top:6px;width:40px;height:40px;border-radius:14px;
  display:grid;place-items:center;
  background:#fff;border:1.5px solid rgba(255,90,31,.35);color:var(--brand);
  font-family:"DIN Alternate",ui-monospace,monospace;font-weight:800;font-size:14px;
  box-shadow:var(--sh-soft);
}
.tl-body{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
  padding:20px 22px;box-shadow:var(--sh-soft);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.tl-body:hover{transform:translateY(-4px);box-shadow:var(--sh-lift);border-color:rgba(255,90,31,.22)}

.faq-item{border-radius:var(--r-lg)}
.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:600;color:var(--ink);
}
.faq-mark{
  flex:0 0 auto;width:34px;height:34px;border-radius:999px;
  display:grid;place-items:center;background:var(--sand);color:#8A5A2B;
  transition:transform .26s var(--ease),background-color .26s var(--ease),color .26s var(--ease);
}
.faq-item.is-open .faq-mark{
  background-image:linear-gradient(120deg,#FF5A1F 0%,#FF8A3D 55%,#FFC53D 100%);
  color:#fff;transform:rotate(45deg);
}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s var(--ease)}
.faq-a-inner{padding:0 22px 22px;font-size:15px;line-height:1.8;color:var(--muted)}

.kv-row{display:flex;gap:16px;padding:16px 0;border-bottom:1px dashed var(--line);align-items:flex-start}
.kv-row:last-child{border-bottom:0}
.kv-key{flex:0 0 96px;font-size:14px;font-weight:700;color:var(--ink)}
.kv-val{font-size:15px;color:var(--muted);line-height:1.75}

.footer-title{font-size:13px;letter-spacing:.08em;color:#8C8279;font-weight:700;margin-bottom:16px}
.footer-link{font-size:14px;color:#C9C0B7;transition:color .2s var(--ease),transform .2s var(--ease);display:inline-block}
.footer-link:hover{color:#fff;transform:translateX(-2px)}

.no-scrollbar{scrollbar-width:none;-ms-overflow-style:none}
.no-scrollbar::-webkit-scrollbar{display:none}

@media (max-width:1023px){
  .tl-item{padding-left:52px}
  .tl-dot{width:36px;height:36px}
  .tl-item::before{left:17px}
}
@media (max-width:640px){
  .kv-row{flex-direction:column;gap:4px}
  .kv-key{flex:none}
}

@media (prefers-reduced-motion:reduce){
  *{transition-duration:.01ms !important;animation-duration:.01ms !important}
}

/* roulang page: category3 */
:root{
    --brand:#FF5A1F;
    --brand-soft:#FFF1E7;
    --accent:#0FA37F;
    --yellow:#FFC53D;
    --ink:#14110D;
    --cream:#FBF7F2;
    --white:#FFFFFF;
    --soft-bg:#F5EFE8;
    --line:#EFE6DC;
    --text:#2A2622;
    --muted:#6B6259;
    --r-card:24px;
    --r-mid:16px;
    --r-sm:12px;
    --pill:999px;
    --grad-brand:linear-gradient(120deg,#FF5A1F 0%,#FF8A3D 55%,#FFC53D 100%);
    --grad-accent:linear-gradient(120deg,#0FA37F 0%,#14C39A 100%);
    --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(--cream);
    color:var(--text);
    font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
    font-size:16px;
    line-height:1.85;
    -webkit-font-smoothing:antialiased;
  }
  img{max-width:100%;display:block}
  a{color:inherit;text-decoration:none;transition:color .2s var(--ease),background-color .2s var(--ease),transform .2s var(--ease)}
  button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
  ul,ol{margin:0;padding:0;list-style:none}
  h1,h2,h3,h4,p,figure{margin:0}
  ::selection{background:rgba(255,90,31,.2)}
  :focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:8px}
  ::-webkit-scrollbar{width:10px;height:10px}
  ::-webkit-scrollbar-thumb{background:#E2D6C9;border-radius:999px;border:2px solid var(--cream)}
  ::-webkit-scrollbar-thumb:hover{background:#CFC0AF}

  .container-site{max-width:1200px;margin:0 auto;padding-left:20px;padding-right:20px}
  @media (min-width:768px){.container-site{padding-left:24px;padding-right:24px}}

  .grad-brand{background:var(--grad-brand)}
  .grad-accent{background:var(--grad-accent)}

  .section{padding-top:64px;padding-bottom:64px}
  @media (min-width:768px){.section{padding-top:88px;padding-bottom:88px}}
  @media (min-width:1024px){.section{padding-top:112px;padding-bottom:112px}}
  .section-tight{padding-top:56px;padding-bottom:56px}
  @media (min-width:768px){.section-tight{padding-top:72px;padding-bottom:72px}}

  /* ============ 顶部细条 & 导航 ============ */
  .topbar{background:var(--ink);color:#C9C0B7;font-size:12px}
  .topbar .container-site{height:34px;display:flex;align-items:center;justify-content:space-between;gap:16px}
  .topbar a:hover{color:#fff}
  .topbar-mini{display:none}
  @media (min-width:768px){.topbar-mini{display:flex;align-items:center;gap:20px}}

  .site-header{
    position:sticky;top:0;z-index:50;
    background:rgba(255,255,255,.88);
    backdrop-filter:blur(10px);
    -webkit-backdrop-filter:blur(10px);
    border-bottom:1px solid var(--line);
  }
  .header-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;height:78px}

  .logo-mark{width:44px;height:44px;border-radius:14px;display:grid;place-items:center;flex:0 0 auto;box-shadow:0 8px 20px -10px rgba(255,90,31,.6)}

  .chip{
    display:inline-flex;align-items:center;justify-content:center;
    min-height:44px;padding:0 18px;border-radius:var(--pill);
    font-size:14px;font-weight:600;color:#4A423B;white-space:nowrap;
    transition:background-color .2s var(--ease),color .2s var(--ease),box-shadow .2s var(--ease);
  }
  .chip:hover{background:#EDE3D8;color:#2A2622}
  .chip-active{background:var(--grad-brand);color:#fff;box-shadow:inset 0 -2px 6px rgba(160,50,0,.18)}
  .chip-active:hover{background:var(--grad-brand);color:#fff}
  .chip-soft{background:#fff;border:1px solid var(--line);color:#4A423B}
  .chip-soft:hover{background:#FFF1E7;border-color:rgba(255,90,31,.4);color:var(--brand)}

  .nav-pill{display:none;align-items:center;gap:4px;border-radius:var(--pill);background:#F7F2EC;padding:4px}
  @media (min-width:1024px){.nav-pill{display:flex}}
  .header-actions{display:none;align-items:center;gap:18px}
  @media (min-width:1024px){.header-actions{display:flex}}

  .burger{width:44px;height:44px;border-radius:14px;border:1px solid var(--line);background:#fff;display:grid;place-items:center}
  .burger span{display:block;width:18px;height:2px;background:#2A2622;border-radius:2px;position:relative}
  .burger span::before,.burger span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:#2A2622;border-radius:2px}
  .burger span::before{top:-6px}
  .burger span::after{top:6px}
  @media (min-width:1024px){.burger{display:none}}

  .drawer{display:none;border-top:1px solid var(--line);background:#fff;padding:18px 0 24px}
  .drawer.open{display:block}
  @media (min-width:1024px){.drawer{display:none !important}}
  .drawer-chips{display:flex;flex-wrap:wrap;gap:8px}

  /* ============ 按钮 ============ */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    min-height:46px;padding:0 26px;border-radius:var(--pill);
    font-size:15px;font-weight:700;white-space:nowrap;
    transition:transform .2s var(--ease),box-shadow .2s var(--ease),background-color .2s var(--ease),filter .2s var(--ease),color .2s var(--ease);
  }
  .btn-primary{background:var(--grad-brand);color:#fff;box-shadow:0 10px 24px -14px rgba(255,90,31,.9)}
  .btn-primary:hover{filter:brightness(.95);transform:translateY(-2px);box-shadow:0 16px 34px -14px rgba(255,90,31,.55)}
  .btn-primary:active{transform:translateY(1px)}
  .btn-outline{background:#fff;border:1px solid var(--brand);color:var(--brand)}
  .btn-outline:hover{background:var(--brand-soft);transform:translateY(-2px)}
  .btn-outline:active{transform:translateY(1px)}
  .btn-ghost{background:transparent;border:1.5px solid rgba(255,255,255,.85);color:#fff}
  .btn-ghost:hover{background:rgba(255,255,255,.14);transform:translateY(-2px)}
  .btn-block{width:100%}
  .btn-sm{min-height:44px;padding:0 20px;font-size:14px}

  .text-link{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:700;color:var(--brand)}
  .text-link .arrow{transition:transform .2s var(--ease)}
  .text-link:hover .arrow{transform:translateX(4px)}
  .text-link-muted{display:inline-flex;align-items:center;gap:6px;font-size:14.5px;font-weight:600;color:#4A423B}
  .text-link-muted:hover{color:var(--brand)}

  /* ============ 面包屑 ============ */
  .breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--muted)}
  .breadcrumb a{padding:6px 2px;border-radius:8px}
  .breadcrumb a:hover{color:var(--brand)}
  .breadcrumb .sep{color:#C6B9AB}
  .breadcrumb .current{color:#2A2622;font-weight:600}

  /* ============ Hero ============ */
  .hero{position:relative;overflow:hidden;background:linear-gradient(180deg,#FFF9F3 0%,#FBF7F2 100%)}
  .hero::after{
    content:"";position:absolute;right:-120px;top:-160px;width:520px;height:520px;border-radius:50%;
    background:radial-gradient(circle,rgba(255,138,61,.32) 0%,rgba(255,197,61,.12) 45%,rgba(255,197,61,0) 70%);
    pointer-events:none;
  }
  .hero-grid{position:relative;z-index:1;display:grid;gap:36px;align-items:center;padding-top:48px;padding-bottom:56px}
  @media (min-width:1024px){.hero-grid{grid-template-columns:1.05fr .95fr;gap:56px;padding-top:72px;padding-bottom:88px}}
  .h1{font-size:clamp(30px,5vw,52px);font-weight:800;line-height:1.15;letter-spacing:-.5px;color:var(--ink)}
  .hero-sub{margin-top:16px;font-size:clamp(16px,1.6vw,18px);line-height:1.8;color:var(--muted);max-width:560px}

  .stat-badge{
    display:inline-flex;align-items:center;gap:10px;min-height:56px;padding:8px 18px;
    background:#fff;border:1px solid rgba(255,90,31,.28);border-radius:var(--pill);
    box-shadow:0 1px 2px rgba(20,17,13,.04);
    transition:transform .2s var(--ease),box-shadow .2s var(--ease);
  }
  .stat-badge:hover{transform:translateY(-2px);box-shadow:0 10px 22px -14px rgba(255,90,31,.65)}
  .stat-num{font-family:"DIN Alternate","Roboto Condensed",ui-monospace,monospace;font-size:24px;font-weight:800;line-height:1;color:var(--brand)}
  .stat-label{font-size:13px;font-weight:600;color:#4A423B}

  .hero-figure{border-radius:var(--r-card);overflow:hidden;border:1px solid rgba(20,17,13,.06);box-shadow:0 1px 2px rgba(20,17,13,.06),0 26px 60px -30px rgba(255,90,31,.4);background:#fff}
  .hero-figure img{width:100%;aspect-ratio:16/10;object-fit:cover}

  /* ============ 通用板块标题 ============ */
  .eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:700;letter-spacing:.04em;color:var(--brand)}
  .eyebrow::before{content:"";width:22px;height:2px;border-radius:2px;background:var(--grad-brand)}
  .h2{font-size:clamp(24px,3.4vw,34px);font-weight:700;line-height:1.25;color:var(--ink);margin-top:12px}
  .h3{font-size:20px;font-weight:600;line-height:1.45;color:var(--ink)}
  .lead{margin-top:14px;font-size:16px;line-height:1.85;color:var(--muted);max-width:700px}

  /* ============ Zigzag ============ */
  .zig{display:grid;gap:28px;align-items:center;margin-bottom:56px}
  @media (min-width:1024px){.zig{grid-template-columns:1fr 1fr;gap:56px;margin-bottom:88px}}
  .zig:last-child{margin-bottom:0}
  .zig-num{font-family:"DIN Alternate","Roboto Condensed",ui-monospace,monospace;font-size:64px;font-weight:800;line-height:1;color:#F0E2D4;letter-spacing:-2px}
  @media (min-width:1024px){.zig-num{font-size:88px}}
  .zig-text{margin-top:14px;font-size:16.5px;line-height:1.9;color:#3D3730;max-width:560px}
  .zig-figure{border-radius:var(--r-card);overflow:hidden;background:#fff;border:1px solid var(--line);box-shadow:0 1px 2px rgba(20,17,13,.05),0 18px 44px -26px rgba(20,17,13,.28)}
  .zig-figure img{width:100%;aspect-ratio:16/10;object-fit:cover}
  .check-list{margin-top:22px;display:grid;gap:12px}
  .check-item{display:flex;align-items:flex-start;gap:10px;font-size:15px;line-height:1.7;color:#3D3730}
  .check-dot{flex:0 0 auto;width:20px;height:20px;border-radius:50%;background:var(--grad-accent);display:grid;place-items:center;margin-top:3px}
  .check-dot svg{width:11px;height:11px}
  @media (min-width:1024px){.zig.reverse .zig-text-col{order:2}.zig.reverse .zig-figure-col{order:1}}

  /* ============ 数据服务说明卡 ============ */
  .info-card{
    background:#fff;border:1px solid var(--line);border-radius:var(--r-mid);padding:24px;
    box-shadow:0 1px 2px rgba(20,17,13,.05);
    transition:transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease);
  }
  .info-card:hover{transform:translateY(-4px);box-shadow:0 16px 40px -16px rgba(255,90,31,.28);border-color:rgba(255,90,31,.28)}
  .info-icon{width:44px;height:44px;border-radius:14px;display:grid;place-items:center;background:var(--brand-soft);color:var(--brand);margin-bottom:16px}

  /* ============ CTA 收束（描边卡） ============ */
  .cta-outline{
    position:relative;overflow:hidden;background:#fff;border:1px solid rgba(255,90,31,.45);
    border-radius:28px;padding:32px 24px;
    box-shadow:0 1px 2px rgba(20,17,13,.05),0 22px 50px -34px rgba(255,90,31,.5);
    display:grid;gap:24px;align-items:center;
  }
  @media (min-width:768px){.cta-outline{padding:44px 40px}}
  @media (min-width:1024px){.cta-outline{grid-template-columns:1.4fr .9fr;gap:40px}}
  .cta-deco{
    position:absolute;right:18px;bottom:-38px;font-family:"DIN Alternate","Roboto Condensed",ui-monospace,monospace;
    font-size:150px;font-weight:800;line-height:1;color:rgba(255,90,31,.07);pointer-events:none;user-select:none;
  }
  @media (min-width:768px){.cta-deco{font-size:200px;right:34px;bottom:-58px}}
  .cta-actions{position:relative;z-index:1;display:flex;flex-wrap:wrap;gap:12px}

  /* ============ FAQ ============ */
  .faq-wrap{max-width:820px;margin:0 auto}
  .faq-item{background:#fff;border:1px solid var(--line);border-radius:var(--r-mid);margin-bottom:12px;overflow:hidden;transition:border-color .2s var(--ease),box-shadow .2s var(--ease)}
  .faq-item:hover{border-color:rgba(255,90,31,.3)}
  .faq-item.is-open{border-color:rgba(255,90,31,.4);box-shadow:0 12px 30px -22px rgba(255,90,31,.7)}
  .faq-q{display:flex;width:100%;align-items:center;justify-content:space-between;gap:16px;min-height:60px;padding:18px 20px;font-size:17px;font-weight:600;text-align:left;color:var(--ink)}
  .faq-ico{flex:0 0 auto;width:32px;height:32px;border-radius:50%;background:var(--soft-bg);color:var(--brand);display:grid;place-items:center;font-size:18px;font-weight:700;line-height:1;transition:transform .24s var(--ease),background-color .24s var(--ease),color .24s var(--ease)}
  .faq-item.is-open .faq-ico{background:var(--grad-brand);color:#fff;transform:rotate(45deg)}
  .faq-a{max-height:0;overflow:hidden;transition:max-height .28s var(--ease)}
  .faq-item.is-open .faq-a{max-height:340px}
  .faq-a p{padding:0 20px 20px;font-size:15px;line-height:1.8;color:var(--muted)}

  /* ============ 页脚 ============ */
  .footer-title{font-size:13px;font-weight:700;letter-spacing:.08em;color:#8C8279;margin-bottom:16px}
  .footer-link{display:inline-block;font-size:14px;color:#C9C0B7;padding:4px 0}
  .footer-link:hover{color:#fff;transform:translateX(2px)}

  .divider{height:1px;background:var(--line);border:0;margin:0}

/* roulang page: category4 */
:root{
    --brand:#FF5A1F;
    --brand-2:#FF8A3D;
    --brand-deep:#D9460A;
    --brand-soft:#FFF1E7;
    --accent:#0FA37F;
    --accent-2:#14C39A;
    --signal:#FFC53D;
    --ink:#14110D;
    --ink-soft:#241F19;
    --cream:#FBF7F2;
    --surface:#FFFFFF;
    --surface-2:#F5EFE8;
    --line:#EFE6DC;
    --text:#2A2622;
    --muted:#6B6259;
    --paper:#FFF7EF;
    --radius-card:24px;
    --radius-lg:16px;
    --radius-sm:12px;
    --radius-pill:999px;
    --shadow-soft:0 1px 2px rgba(20,17,13,.06), 0 8px 24px -12px rgba(255,90,31,.18);
    --shadow-lift:0 16px 40px -16px rgba(255,90,31,.28);
    --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(--cream);
    color:var(--text);
    font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
    font-size:16px;
    line-height:1.85;
  }
  img{max-width:100%;display:block;}
  a{color:inherit;text-decoration:none;}
  button{font:inherit;cursor:pointer;border:0;background:none;}
  ul,ol{margin:0;padding:0;list-style:none;}
  h1,h2,h3,h4,p{margin:0;}
  h1,h2,h3{color:var(--ink);letter-spacing:-.01em;}
  section[id],div[id]{scroll-margin-top:96px;}

  a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{
    outline:2px solid var(--brand);
    outline-offset:2px;
    border-radius:10px;
  }

  .container-site{width:100%;max-width:1200px;margin:0 auto;padding:0 20px;}
  @media (min-width:768px){.container-site{padding:0 24px;}}

  .section{padding-top:56px;padding-bottom:56px;}
  @media (min-width:768px){.section{padding-top:88px;padding-bottom:88px;}}
  @media (min-width:1024px){.section{padding-top:112px;padding-bottom:112px;}}

  .grad-brand{background-image:linear-gradient(120deg,#FF5A1F 0%,#FF8A3D 55%,#FFC53D 100%);}
  .grad-accent{background-image:linear-gradient(120deg,#0FA37F 0%,#14C39A 100%);}

  /* 按钮 */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    min-height:44px;padding:0 22px;border-radius:var(--radius-pill);
    font-size:15px;font-weight:600;line-height:1;border:1px solid transparent;
    transition:transform .2s var(--ease),box-shadow .2s var(--ease),background-color .2s var(--ease),filter .2s var(--ease),color .2s var(--ease);
  }
  .btn-primary{
    background-image:linear-gradient(120deg,#FF5A1F 0%,#FF8A3D 55%,#FFC53D 100%);
    color:#fff;box-shadow:var(--shadow-soft);
  }
  .btn-primary:hover{filter:brightness(.95);transform:translateY(-2px);box-shadow:var(--shadow-lift);}
  .btn-primary:active{transform:translateY(0);}
  .btn-outline{background:#fff;border-color:var(--brand);color:var(--brand-deep);}
  .btn-outline:hover{background:var(--brand-soft);transform:translateY(-2px);}
  .btn-outline:active{transform:translateY(0);}
  .btn-white{background:#fff;color:var(--brand-deep);box-shadow:var(--shadow-soft);}
  .btn-white:hover{background:var(--brand-soft);transform:translateY(-2px);box-shadow:var(--shadow-lift);}
  .btn-white:active{transform:translateY(0);}
  .btn-ghost{background:transparent;border:1.5px solid rgba(255,255,255,.72);color:#fff;}
  .btn-ghost:hover{background:rgba(255,255,255,.14);transform:translateY(-2px);}
  .btn[disabled],.btn.is-disabled{background:#E7DFD6;color:#9C938A;box-shadow:none;pointer-events:none;}
  .btn-text{
    display:inline-flex;align-items:center;gap:6px;color:var(--brand-deep);
    font-weight:600;font-size:14px;
  }
  .btn-text svg{transition:transform .2s var(--ease);}
  .btn-text:hover svg{transform:translateX(4px);}

  /* 标签与徽章 */
  .tag{
    display:inline-flex;align-items:center;height:26px;padding:0 10px;border-radius:var(--radius-pill);
    background:var(--brand-soft);color:var(--brand-deep);font-size:12px;font-weight:600;
    letter-spacing:.02em;white-space:nowrap;
  }
  .tag-accent{background:rgba(15,163,127,.12);color:#0A7A5F;}
  .tag-ink{background:rgba(20,17,13,.08);color:#4A423B;}

  .chip{
    display:inline-flex;align-items:center;height:40px;padding:0 14px;border-radius:var(--radius-pill);
    font-size:13.5px;font-weight:500;line-height:1;color:#4A423B;background:transparent;white-space:nowrap;
    transition:background-color .2s var(--ease),color .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease);
  }
  .chip:hover{background:rgba(20,17,13,.07);}
  .chip-active{
    background-image:linear-gradient(120deg,#FF5A1F 0%,#FF8A3D 55%,#FFC53D 100%);
    color:#fff;
    box-shadow:inset 0 1px 0 rgba(255,255,255,.28),0 8px 18px -10px rgba(255,90,31,.7);
  }
  .chip-active:hover{background-image:linear-gradient(120deg,#FF5A1F 0%,#FF8A3D 55%,#FFC53D 100%);}

  .card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);box-shadow:var(--shadow-soft);}
  .hover-lift{transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);}
  .hover-lift:hover{transform:translateY(-4px);box-shadow:var(--shadow-lift);border-color:rgba(255,90,31,.28);}

  .clamp-2{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
  .clamp-3{display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;}

  .hero-glow{
    position:absolute;right:-120px;top:-90px;width:520px;height:520px;pointer-events:none;opacity:.9;
    background:radial-gradient(circle at center,rgba(255,138,61,.30),rgba(255,197,61,0) 68%);
  }

  .img-fallback{
    background:rgba(255,90,31,.08);display:grid;place-items:center;min-height:120px;
  }
  .img-fallback::after{
    content:"";width:38px;height:38px;border-radius:12px;border:2px solid rgba(255,90,31,.45);
    background-image:linear-gradient(135deg,rgba(255,90,31,.22),rgba(255,197,61,.22));
  }

  .breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--muted);}
  .breadcrumb a{color:var(--muted);transition:color .2s var(--ease);}
  .breadcrumb a:hover{color:var(--brand-deep);}
  .breadcrumb .sep{color:#C4B9AE;}

  .badge-data{
    display:inline-flex;align-items:center;gap:10px;height:52px;padding:0 16px;
    border-radius:var(--radius-pill);background:#fff;border:1px solid rgba(255,90,31,.28);
    transition:transform .2s var(--ease),box-shadow .2s var(--ease);
  }
  .badge-data:hover{transform:translateY(-2px);box-shadow:0 10px 24px -14px rgba(255,90,31,.45);}
  .badge-data .num{font-family:"DIN Alternate","SF Mono",ui-monospace,Menlo,monospace;font-size:24px;font-weight:700;color:var(--brand);line-height:1;}
  .badge-data .lbl{font-size:13px;color:var(--muted);white-space:nowrap;}

  .step-num{
    font-family:"DIN Alternate","SF Mono",ui-monospace,Menlo,monospace;
    font-size:64px;font-weight:800;line-height:1;color:rgba(255,90,31,.16);
  }

  /* FAQ */
  .faq-item{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);overflow:hidden;transition:border-color .22s var(--ease),box-shadow .22s var(--ease);}
  .faq-item:hover{border-color:rgba(255,90,31,.28);}
  .faq-item.is-open{border-color:rgba(255,90,31,.35);box-shadow:var(--shadow-soft);}
  .faq-q{
    width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
    padding:18px 20px;text-align:left;font-size:17px;font-weight:600;color:var(--ink);
  }
  .faq-icon{
    flex:none;width:32px;height:32px;border-radius:var(--radius-pill);display:grid;place-items:center;
    background:var(--surface-2);color:var(--brand-deep);transition:background .22s var(--ease),color .22s var(--ease),transform .22s var(--ease);
  }
  .faq-icon svg{transition:transform .22s var(--ease);}
  .faq-item.is-open .faq-icon{
    background-image:linear-gradient(120deg,#FF5A1F 0%,#FF8A3D 55%,#FFC53D 100%);color:#fff;
  }
  .faq-item.is-open .faq-icon svg{transform:rotate(45deg);}
  .faq-a{max-height:0;overflow:hidden;transition:max-height .28s var(--ease);}
  .faq-a p{padding:0 20px 20px;font-size:15px;line-height:1.8;color:var(--muted);}

  /* 页脚 */
  .footer-title{font-size:13px;letter-spacing:.08em;color:#8C8279;font-weight:700;margin-bottom:16px;}
  .footer-link{color:#C9C0B7;font-size:14px;transition:color .2s var(--ease),transform .2s var(--ease);display:inline-block;}
  .footer-link:hover{color:#fff;transform:translateX(2px);}

  /* 移动抽屉 */
  .m-drawer{position:fixed;inset:0;z-index:80;display:none;}
  .m-drawer.is-open{display:block;}
  .m-drawer__mask{position:absolute;inset:0;background:rgba(20,17,13,.5);backdrop-filter:blur(2px);}
  .m-drawer__panel{
    position:absolute;right:0;top:0;bottom:0;width:min(88vw,380px);background:#fff;
    padding:22px;overflow-y:auto;display:flex;flex-direction:column;gap:14px;
    box-shadow:-20px 0 50px -30px rgba(20,17,13,.5);
  }

  ::-webkit-scrollbar{width:10px;height:10px;}
  ::-webkit-scrollbar-track{background:var(--surface-2);}
  ::-webkit-scrollbar-thumb{background:#D9CEC2;border-radius:999px;border:2px solid var(--surface-2);}
  ::-webkit-scrollbar-thumb:hover{background:#C4B7A8;}

  @media (prefers-reduced-motion:reduce){
    *{transition-duration:.01ms !important;animation-duration:.01ms !important;}
    html{scroll-behavior:auto;}
  }