/* roulang page: index */
:root{
    --ink:#0E0E10;
    --ink-soft:#3B3B41;
    --ink-mute:#7A7A82;
    --paper:#F7F5F1;
    --surface:#FFFFFF;
    --paper-dark:#0E0E10;
    --accent:#C9F24D;
    --accent-deep:#A8D62F;
    --warm:#FF6A3D;
    --line:rgba(14,14,16,.10);
    --line-strong:rgba(14,14,16,.22);
    --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(--paper);
    color:var(--ink);
    font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,sans-serif;
    font-size:16px;
    line-height:1.75;
    letter-spacing:.01em;
    -webkit-font-smoothing:antialiased;
  }
  img{max-width:100%;display:block;}
  a{color:inherit;text-decoration:none;}
  button,input,textarea{font:inherit;color:inherit;}
  h1,h2,h3,h4,p{margin:0;}
  ul{margin:0;padding:0;list-style:none;}
  .tnum{font-variant-numeric:tabular-nums;}

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

  /* ---------- header ---------- */
  .site-header{
    position:sticky;top:0;z-index:60;
    background:rgba(247,245,241,.88);
    backdrop-filter:blur(6px);
    -webkit-backdrop-filter:blur(6px);
    border-bottom:1px solid var(--line);
    transition:background .2s var(--ease),box-shadow .2s var(--ease);
  }
  .site-header.is-scrolled{background:rgba(247,245,241,.96);box-shadow:0 1px 0 var(--line);}
  .header-inner{height:72px;display:flex;align-items:center;justify-content:space-between;gap:16px;}
  .brand{display:inline-flex;align-items:center;gap:10px;}
  .brand-mark{
    width:28px;height:28px;border-radius:8px;background:var(--ink);
    display:flex;align-items:center;justify-content:center;flex:none;
  }
  .brand-mark svg{width:16px;height:16px;stroke:var(--accent);}
  .brand-text{display:flex;flex-direction:column;line-height:1.15;}
  .brand-line-1{font-size:16px;font-weight:800;letter-spacing:-.01em;}
  .brand-line-2{font-size:11px;letter-spacing:.22em;color:var(--ink-mute);}
  .nav-link{
    position:relative;display:inline-block;padding:6px 2px;font-size:15px;font-weight:500;
    color:var(--ink-soft);transition:color .2s var(--ease);
  }
  .nav-link::after{
    content:"";position:absolute;left:0;right:0;bottom:0;height:1px;background:var(--accent-deep);
    transform:scaleX(0);transform-origin:left;transition:transform .2s var(--ease);
  }
  .nav-link:hover{color:var(--ink);}
  .nav-link:hover::after{transform:scaleX(1);}
  .nav-link.is-active{color:var(--ink);font-weight:600;}
  .nav-link.is-active::after{transform:scaleX(1);height:3px;border-radius:2px;}
  .nav-cta{
    display:inline-flex;align-items:center;gap:6px;
    border:1px solid var(--line-strong);border-radius:999px;
    padding:8px 16px;font-size:14px;font-weight:600;
    transition:all .2s var(--ease);
  }
  .nav-cta:hover{border-color:var(--ink);background:var(--surface);}
  .nav-cta svg{width:14px;height:14px;transition:transform .2s var(--ease);}
  .nav-cta:hover svg{transform:translateX(3px);}
  .icon-btn{
    width:44px;height:44px;display:inline-flex;align-items:center;justify-content:center;
    border:1px solid var(--line);border-radius:12px;background:transparent;cursor:pointer;
    transition:all .2s var(--ease);
  }
  .icon-btn:hover{border-color:var(--line-strong);background:var(--surface);}
  .icon-btn:focus-visible{outline:2px solid var(--accent);outline-offset:2px;}
  .mobile-drawer{
    position:fixed;inset:0;z-index:80;background:var(--paper);
    transform:translateY(-14px);opacity:0;pointer-events:none;
    transition:opacity .18s var(--ease),transform .18s var(--ease);
    display:flex;flex-direction:column;
  }
  .mobile-drawer.is-open{opacity:1;transform:none;pointer-events:auto;}
  .drawer-head{height:72px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);}
  .drawer-body{flex:1;overflow-y:auto;padding:8px 0 24px;}
  .drawer-link{
    display:flex;align-items:center;justify-content:space-between;
    padding:18px 4px;font-size:18px;font-weight:600;border-bottom:1px solid var(--line);
  }
  .drawer-link:hover{color:var(--accent-deep);}
  .drawer-foot{padding:20px 0 32px;border-top:1px solid var(--line);}

  /* ---------- buttons ---------- */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    border-radius:999px;font-size:15px;font-weight:600;
    padding:14px 28px;border:1px solid transparent;cursor:pointer;
    transition:all .2s var(--ease);
  }
  .btn svg{width:16px;height:16px;transition:transform .2s var(--ease);}
  .btn:hover svg{transform:translateX(4px);}
  .btn-primary{background:var(--accent);color:var(--ink);}
  .btn-primary:hover{background:var(--accent-deep);transform:scale(1.02);}
  .btn-ghost{background:transparent;border-color:var(--line-strong);color:var(--ink);}
  .btn-ghost:hover{border-color:var(--ink);background:var(--surface);}
  .btn:focus-visible{outline:2px solid var(--accent);outline-offset:3px;}
  .link-arrow{
    display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;
    color:var(--ink);
  }
  .link-arrow svg{width:15px;height:15px;stroke:var(--accent-deep);transition:transform .2s var(--ease);}
  .link-arrow:hover svg{transform:translateX(4px);}

  /* ---------- badges ---------- */
  .badge{
    display:inline-flex;align-items:center;gap:6px;height:26px;padding:0 12px;
    border-radius:999px;font-size:12px;letter-spacing:.04em;
    border:1px solid var(--line-strong);color:var(--ink-soft);background:transparent;
  }
  .badge-accent{background:rgba(201,242,77,.32);border-color:rgba(168,214,47,.55);color:#3F4C12;}
  .badge-warm{background:rgba(255,106,61,.12);border-color:rgba(255,106,61,.38);color:#A03A18;}

  /* ---------- sections ---------- */
  .section{padding-top:56px;padding-bottom:56px;}
  @media (min-width:768px){.section{padding-top:80px;padding-bottom:80px;}}
  @media (min-width:1024px){.section{padding-top:112px;padding-bottom:112px;}}
  .section-head{margin-bottom:32px;}
  @media (min-width:1024px){.section-head{margin-bottom:48px;}}
  .eyebrow{
    font-size:12px;letter-spacing:.2em;color:var(--ink-mute);text-transform:uppercase;
    display:inline-flex;align-items:center;gap:10px;margin-bottom:14px;
  }
  .eyebrow::before{content:"";width:22px;height:1px;background:var(--accent-deep);display:inline-block;}
  h1{font-size:clamp(34px,5vw,64px);font-weight:800;line-height:1.08;letter-spacing:-.02em;}
  h2{font-size:clamp(24px,3vw,40px);font-weight:700;line-height:1.2;letter-spacing:-.015em;}
  h3{font-size:19px;font-weight:600;line-height:1.45;}
  .lead{font-size:clamp(17px,2vw,19px);line-height:1.72;color:var(--ink-soft);}
  .muted{font-size:13px;line-height:1.6;color:var(--ink-mute);}
  .hl{
    background:linear-gradient(transparent 62%,rgba(201,242,77,.85) 62%);
    padding:0 2px;
  }

  /* ---------- hero ---------- */
  .hero{padding-top:48px;position:relative;overflow:hidden;}
  @media (min-width:1024px){.hero{padding-top:80px;}}
  .hero-media{
    position:relative;border-radius:12px;overflow:hidden;border:1px solid var(--line);
    background:var(--paper);aspect-ratio:16/10;
  }
  .hero-media img{width:100%;height:100%;object-fit:cover;}
  .hero-tag{
    position:absolute;right:14px;bottom:14px;background:var(--accent);color:var(--ink);
    border-radius:999px;padding:8px 16px;font-size:12px;font-weight:700;letter-spacing:.02em;
  }
  .hero-strip{
    margin-top:56px;background:var(--paper-dark);color:#F2F0EB;
    padding:32px 0;
  }
  @media (min-width:1024px){.hero-strip{margin-top:80px;}}
  .strip-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px 8px;}
  @media (min-width:768px){.strip-grid{grid-template-columns:repeat(4,minmax(0,1fr));}}
  .strip-item{padding-left:16px;border-left:1px solid rgba(255,255,255,.14);}
  .strip-num{font-size:26px;font-weight:800;color:var(--accent);letter-spacing:-.01em;}
  .strip-label{font-size:13px;color:rgba(242,240,235,.68);margin-top:2px;}
  .trust-row{display:flex;flex-wrap:wrap;align-items:center;gap:8px 14px;font-size:13px;color:var(--ink-mute);}
  .trust-row span.dot{width:1px;height:12px;background:var(--line-strong);display:inline-block;}

  /* ---------- value columns ---------- */
  .value-grid{display:grid;grid-template-columns:1fr;gap:0;}
  @media (min-width:1024px){.value-grid{grid-template-columns:repeat(3,minmax(0,1fr));}}
  .value-col{border-top:1px solid var(--line-strong);padding:28px 0 4px;}
  @media (min-width:1024px){
    .value-col{padding:36px 32px 8px;border-top:1px solid var(--line-strong);}
    .value-col + .value-col{border-left:1px solid var(--line);}
    .value-col:first-child{padding-left:0;}
    .value-col:last-child{padding-right:0;}
  }
  .value-index{
    font-size:clamp(46px,6vw,62px);font-weight:800;line-height:1;
    color:transparent;-webkit-text-stroke:1.4px rgba(168,214,47,.9);
    letter-spacing:-.02em;margin-bottom:16px;
  }

  /* ---------- steps ---------- */
  .step-block{display:grid;grid-template-columns:1fr;gap:28px;align-items:center;}
  @media (min-width:1024px){
    .step-block{grid-template-columns:repeat(12,minmax(0,1fr));gap:40px;}
    .step-block .step-media{grid-column:span 6;}
    .step-block .step-copy{grid-column:span 6;}
    .step-block.is-reverse .step-media{order:2;}
  }
  .step-media{position:relative;border-radius:12px;overflow:hidden;border:1px solid var(--line);aspect-ratio:4/3;background:var(--paper);}
  .step-media img{width:100%;height:100%;object-fit:cover;}
  .step-chip{
    position:absolute;top:12px;right:12px;background:rgba(14,14,16,.82);color:#F2F0EB;
    border-radius:999px;padding:6px 14px;font-size:12px;letter-spacing:.08em;font-variant-numeric:tabular-nums;
  }

  /* ---------- cards ---------- */
  .card{
    background:var(--surface);border:1px solid var(--line);border-radius:14px;
    transition:border-color .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease);
  }
  .card:hover{border-color:var(--line-strong);transform:translateY(-2px);box-shadow:0 8px 24px rgba(14,14,16,.08);}
  .card-cover{border-radius:12px;overflow:hidden;aspect-ratio:16/9;background:var(--paper);}
  .card-cover img{width:100%;height:100%;object-fit:cover;}
  .clamp-2{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
  .clamp-1{display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden;}
  .card-title{font-size:18px;font-weight:600;line-height:1.45;transition:color .2s var(--ease);}
  .card:hover .card-title{color:#6E8E12;}
  .card-title:hover{text-decoration:underline;text-decoration-color:var(--accent);text-underline-offset:4px;}

  /* ---------- stats / proof ---------- */
  .proof-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1px;background:var(--line);border:1px solid var(--line);border-radius:14px;overflow:hidden;}
  .proof-cell{background:var(--surface);padding:22px 20px;}
  .proof-num{font-size:28px;font-weight:800;letter-spacing:-.01em;}
  .proof-label{font-size:13px;color:var(--ink-mute);margin-top:4px;}
  .logo-wall{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;}
  @media (min-width:640px){.logo-wall{grid-template-columns:repeat(3,minmax(0,1fr));}}
  .logo-cell{
    height:56px;display:flex;align-items:center;justify-content:center;
    border:1px solid var(--line);border-radius:12px;background:var(--surface);
    font-size:13px;color:var(--ink-mute);letter-spacing:.04em;
    transition:all .2s var(--ease);
  }
  .logo-cell:hover{color:var(--ink);border-color:var(--line-strong);}

  /* ---------- faq ---------- */
  .faq-wrap{max-width:820px;margin:0 auto;}
  .faq-item{border-top:1px solid var(--line);}
  .faq-item:last-child{border-bottom:1px solid var(--line);}
  .faq-item summary{
    list-style:none;cursor:pointer;display:flex;align-items:flex-start;justify-content:space-between;
    gap:20px;padding:22px 0;font-size:16px;font-weight:600;line-height:1.6;
  }
  .faq-item summary::-webkit-details-marker{display:none;}
  .faq-item summary:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px;}
  .faq-plus{flex:none;width:20px;height:20px;position:relative;margin-top:3px;transition:transform .2s var(--ease);}
  .faq-plus::before,.faq-plus::after{content:"";position:absolute;background:var(--ink);}
  .faq-plus::before{left:0;right:0;top:9px;height:1.5px;}
  .faq-plus::after{top:0;bottom:0;left:9px;width:1.5px;}
  .faq-item[open] .faq-plus{transform:rotate(45deg);}
  .faq-answer{padding:0 40px 24px 0;font-size:15px;line-height:1.8;color:var(--ink-soft);}

  /* ---------- dark cta ---------- */
  .cta-band{background:var(--paper-dark);color:#F2F0EB;padding:64px 0;}
  @media (min-width:1024px){.cta-band{padding:96px 0;}}
  .cta-band h2{color:#F2F0EB;}
  .cta-band .lead{color:rgba(242,240,235,.72);}

  /* ---------- footer ---------- */
  .site-footer{background:var(--paper-dark);color:rgba(242,240,235,.72);border-top:1px solid rgba(255,255,255,.12);}
  .footer-link{color:rgba(242,240,235,.72);font-size:14px;transition:color .2s var(--ease);}
  .footer-link:hover{color:var(--accent);text-decoration:underline;text-underline-offset:4px;}
  .footer-title{color:#F2F0EB;font-size:13px;font-weight:600;letter-spacing:.14em;margin-bottom:16px;}
  .footer-bottom{border-top:1px solid rgba(255,255,255,.12);font-size:13px;color:rgba(242,240,235,.5);}

  /* ---------- sticky mobile bar / floating pill ---------- */
  .sticky-bar{
    position:fixed;left:0;right:0;bottom:0;z-index:70;
    background:var(--paper-dark);color:#F2F0EB;
    padding:10px 16px calc(10px + env(safe-area-inset-bottom));
    display:flex;align-items:center;justify-content:space-between;gap:12px;
  }
  @media (min-width:1024px){.sticky-bar{display:none;}}
  .sticky-bar .btn{padding:12px 20px;font-size:14px;}
  .float-pill{
    position:fixed;right:28px;bottom:28px;z-index:70;
    display:none;align-items:center;gap:10px;
    background:var(--paper-dark);color:#F2F0EB;border-radius:999px;
    padding:12px 22px;font-size:14px;font-weight:600;
    transition:all .2s var(--ease);border:1px solid rgba(255,255,255,.14);
  }
  @media (min-width:1024px){.float-pill{display:inline-flex;}}
  .float-pill.is-hidden{opacity:0;pointer-events:none;transform:translateY(10px);}
  .float-pill:hover{background:var(--accent);color:var(--ink);border-color:var(--accent);}
  .float-pill svg{width:15px;height:15px;stroke:var(--accent);}
  .float-pill:hover svg{stroke:var(--ink);transform:translateX(3px);}
  @media (max-width:1023px){body{padding-bottom:88px;}}

  /* ---------- reveal ---------- */
  .reveal{opacity:0;transform:translateY(12px);transition:opacity .42s var(--ease),transform .42s var(--ease);}
  .reveal.is-in{opacity:1;transform:none;}

  /* ---------- empty state ---------- */
  .empty-state{
    border:1px dashed var(--line-strong);border-radius:14px;background:var(--surface);
    padding:48px 24px;text-align:center;
  }
  .empty-state svg{width:40px;height:40px;stroke:var(--ink-mute);margin:0 auto 14px;}
  .empty-mark{width:6px;height:6px;border-radius:999px;background:var(--accent-deep);display:inline-block;margin-right:8px;vertical-align:middle;}

  @media (prefers-reduced-motion: reduce){
    *{animation:none !important;transition:none !important;}
    .reveal{opacity:1;transform:none;}
    html{scroll-behavior:auto;}
  }

/* roulang page: article */
:root{
    --ink:#0E0E10;
    --ink-soft:#3B3B41;
    --ink-mute:#7A7A82;
    --paper:#F7F5F1;
    --surface:#FFFFFF;
    --paper-dark:#0E0E10;
    --accent:#C9F24D;
    --accent-deep:#A8D62F;
    --warm:#FF6A3D;
    --line:rgba(14,14,16,.10);
    --line-strong:rgba(14,14,16,.22);
    --radius-card:14px;
    --radius-img:12px;
    --radius-field:10px;
    --radius-pill:999px;
    --t:200ms 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(--paper);
    color:var(--ink);
    font-family:-apple-system,"PingFang SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",sans-serif;
    font-size:17px;
    line-height:1.75;
    letter-spacing:.01em;
    -webkit-font-smoothing:antialiased;
  }
  img{max-width:100%;display:block;}
  a{color:inherit;text-decoration:none;transition:color var(--t);}
  button{font:inherit;cursor:pointer;border:none;background:none;color:inherit;}
  input,textarea{font:inherit;}
  h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0;}
  ul{padding:0;list-style:none;}
  :focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px;}

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

  .num{font-variant-numeric:tabular-nums;font-family:Inter,system-ui,-apple-system,sans-serif;}

  /* ---------- Header ---------- */
  .site-header{
    position:sticky;
    top:0;
    z-index:60;
    background:rgba(247,245,241,.9);
    backdrop-filter:blur(6px);
    -webkit-backdrop-filter:blur(6px);
    border-bottom:1px solid var(--line);
    transition:box-shadow var(--t),background var(--t);
  }
  .site-header.is-scrolled{box-shadow:0 6px 20px rgba(14,14,16,.06);background:rgba(247,245,241,.96);}
  .header-inner{
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:12px;
    height:72px;
  }
  @media (min-width:1024px){
    .header-inner{display:grid;grid-template-columns:1fr auto 1fr;gap:24px;height:80px;}
  }

  .brand{display:inline-flex;align-items:center;gap:10px;text-decoration:none;}
  .brand-mark{
    width:34px;height:34px;flex:0 0 auto;
    border-radius:10px;
    background:var(--ink);
    color:var(--accent);
    display:flex;align-items:center;justify-content:center;
  }
  .brand-mark svg{width:20px;height:20px;stroke:currentColor;fill:none;}
  .brand-text{display:flex;flex-direction:column;line-height:1.15;}
  .brand-line-1{font-size:16px;font-weight:800;letter-spacing:-.01em;color:var(--ink);}
  .brand-line-2{font-size:11px;letter-spacing:.22em;color:var(--ink-mute);}

  .nav-link{
    position:relative;
    display:inline-block;
    padding:6px 2px;
    font-size:15px;
    font-weight:500;
    color:var(--ink-soft);
    transition:color var(--t);
  }
  .nav-link::after{
    content:"";
    position:absolute;
    left:0;right:0;bottom:-1px;
    height:1px;
    background:var(--accent);
    transform:scaleX(0);
    transform-origin:left;
    transition:transform var(--t);
  }
  .nav-link:hover{color:var(--ink);}
  .nav-link:hover::after{transform:scaleX(1);}
  .nav-link.is-active{color:var(--ink);font-weight:600;}
  .nav-link.is-active::after{height:3px;border-radius:2px;transform:scaleX(1);}

  .nav-cta{
    display:inline-flex;align-items:center;gap:8px;
    padding:9px 18px;
    border:1px solid var(--line-strong);
    border-radius:var(--radius-pill);
    font-size:14px;font-weight:600;
    color:var(--ink);
    transition:border-color var(--t),background var(--t),transform var(--t);
  }
  .nav-cta svg{width:16px;height:16px;transition:transform var(--t);}
  .nav-cta:hover{border-color:var(--ink);background:var(--surface);}
  .nav-cta:hover svg{transform:translateX(4px);}

  .icon-btn{
    width:42px;height:42px;
    display:inline-flex;align-items:center;justify-content:center;
    border:1px solid var(--line);
    border-radius:var(--radius-pill);
    color:var(--ink);
    background:var(--surface);
    transition:border-color var(--t),background var(--t),transform var(--t);
  }
  .icon-btn:hover{border-color:var(--line-strong);transform:translateY(-1px);}

  /* 移动抽屉 */
  .drawer{
    position:fixed;
    inset:0;
    z-index:90;
    background:var(--paper);
    display:flex;
    flex-direction:column;
    padding:20px;
    padding-bottom:calc(32px + env(safe-area-inset-bottom));
    opacity:0;
    transform:translateY(12px);
    pointer-events:none;
    transition:opacity 180ms ease,transform 180ms ease;
    overflow-y:auto;
  }
  .drawer.is-open{opacity:1;transform:translateY(0);pointer-events:auto;}
  .drawer-head{display:flex;align-items:center;justify-content:space-between;height:60px;}
  .drawer-link{
    display:flex;align-items:center;justify-content:space-between;
    padding:18px 2px;
    font-size:18px;font-weight:600;
    color:var(--ink);
    border-bottom:1px solid var(--line);
  }
  .drawer-link span{color:var(--ink-mute);font-size:14px;font-weight:400;}
  .drawer-cta{
    margin-top:24px;
    display:flex;align-items:center;justify-content:center;gap:8px;
    padding:16px 24px;
    border-radius:var(--radius-pill);
    background:var(--accent);
    color:var(--ink);
    font-weight:600;
  }

  /* ---------- 面包屑 ---------- */
  .crumb-bar{border-bottom:1px solid var(--line);background:var(--surface);}
  .crumb{
    display:flex;align-items:center;gap:10px;flex-wrap:wrap;
    padding:16px 0;
    font-size:13px;
    color:var(--ink-mute);
  }
  .crumb a{color:var(--ink-soft);}
  .crumb a:hover{color:var(--ink);text-decoration:underline;}
  .crumb .sep{color:var(--line-strong);}
  .crumb .cur{color:var(--ink-mute);max-width:52ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}

  /* ---------- 文章头部 ---------- */
  .article-head{padding:48px 0 32px;}
  @media (min-width:1024px){ .article-head{padding:72px 0 40px;} }
  .article-shell{max-width:760px;margin:0 auto;}
  .badge-cat{
    display:inline-flex;align-items:center;
    height:26px;padding:0 12px;
    border:1px solid var(--line-strong);
    border-radius:var(--radius-pill);
    font-size:12px;letter-spacing:.04em;
    color:var(--ink-soft);
    background:var(--surface);
  }
  .article-title{
    margin-top:20px;
    font-size:clamp(28px,4.2vw,44px);
    font-weight:800;
    line-height:1.2;
    letter-spacing:-.02em;
  }
  .meta-row{
    display:flex;flex-wrap:wrap;align-items:center;gap:12px;
    margin-top:22px;
    font-size:13px;
    color:var(--ink-mute);
  }
  .meta-row .divider{width:1px;height:12px;background:var(--line-strong);}
  .rule{height:1px;background:var(--line);margin-top:28px;}

  /* ---------- 正文 ---------- */
  .article-body{
    max-width:760px;
    margin:0 auto;
    font-size:17px;
    line-height:1.8;
    color:var(--ink-soft);
    padding-bottom:24px;
  }
  .article-body p{margin-bottom:1.1em;}
  .article-body h2{
    position:relative;
    margin:2em 0 .6em;
    padding-left:18px;
    font-size:clamp(22px,2.6vw,28px);
    font-weight:700;
    line-height:1.3;
    letter-spacing:-.01em;
    color:var(--ink);
  }
  .article-body h2::before{
    content:"";
    position:absolute;left:0;top:.32em;
    width:4px;height:20px;border-radius:2px;
    background:var(--accent);
  }
  .article-body h2:first-child{margin-top:0;}
  .article-body h3{
    margin:1.4em 0 .5em;
    font-size:19px;font-weight:600;line-height:1.4;color:var(--ink);
  }
  .article-body ul,.article-body ol{margin:0 0 1.2em;padding-left:4px;}
  .article-body li{position:relative;padding-left:20px;margin-bottom:.55em;}
  .article-body ul li::before{
    content:"";position:absolute;left:0;top:.62em;
    width:7px;height:7px;border-radius:2px;background:var(--accent);
  }
  .article-body ol{counter-reset:li;}
  .article-body ol li::before{
    counter-increment:li;
    content:counter(li);
    position:absolute;left:0;top:0;
    font-size:14px;font-weight:700;color:var(--ink);font-variant-numeric:tabular-nums;
  }
  .article-body blockquote{
    margin:1.6em 0;
    padding:16px 20px;
    border-left:3px solid var(--accent);
    background:var(--paper);
    border-radius:0 10px 10px 0;
    color:var(--ink-soft);
  }
  .article-body img{
    width:100%;
    margin:1.6em 0;
    border-radius:var(--radius-img);
    border:1px solid var(--line);
  }
  .article-body a{color:var(--ink);text-decoration:underline;text-decoration-color:var(--accent);text-decoration-thickness:2px;text-underline-offset:3px;}
  .article-body a:hover{color:var(--accent-deep);}
  .article-body table{
    width:100%;
    margin:1.6em 0;
    border-collapse:collapse;
    font-size:15px;
    border:1px solid var(--line);
    border-radius:10px;
    overflow:hidden;
  }
  .article-body th,.article-body td{
    padding:10px 14px;text-align:left;border:1px solid var(--line);
  }
  .article-body th{background:var(--paper);font-weight:600;color:var(--ink);}
  .article-body strong{color:var(--ink);font-weight:600;}
  .article-body figcaption{font-size:13px;color:var(--ink-mute);text-align:center;margin:-1em 0 1.6em;}

  .empty-state{
    max-width:760px;margin:0 auto;
    padding:56px 24px;
    border:1px dashed var(--line-strong);
    border-radius:var(--radius-card);
    background:var(--surface);
    text-align:center;
  }
  .empty-state .mark{
    width:44px;height:44px;margin:0 auto 16px;
    border-radius:12px;background:var(--paper);
    display:flex;align-items:center;justify-content:center;
    border:1px solid var(--line);
  }
  .empty-state .mark span{width:10px;height:10px;border-radius:3px;background:var(--accent);display:block;}
  .empty-state p{font-size:16px;font-weight:600;color:var(--ink);margin-bottom:8px;}
  .empty-state small{display:block;font-size:14px;color:var(--ink-mute);margin-bottom:20px;}

  .btn{
    display:inline-flex;align-items:center;gap:8px;
    padding:14px 28px;
    border-radius:var(--radius-pill);
    font-size:15px;font-weight:600;
    transition:background var(--t),color var(--t),transform var(--t),border-color var(--t);
  }
  .btn svg{width:16px;height:16px;transition:transform var(--t);}
  .btn-primary{background:var(--accent);color:var(--ink);}
  .btn-primary:hover{background:var(--accent-deep);transform:scale(1.02);}
  .btn-primary:hover svg{transform:translateX(4px);}
  .btn-ghost{border:1px solid var(--line-strong);color:var(--ink);background:transparent;}
  .btn-ghost:hover{border-color:var(--ink);background:var(--surface);}
  .btn-text{
    display:inline-flex;align-items:center;gap:6px;
    font-size:14px;font-weight:600;color:var(--ink);
  }
  .btn-text svg{width:16px;height:16px;transition:transform var(--t);}
  .btn-text:hover svg{transform:translateX(-4px);}

  /* ---------- 文末与相关推荐 ---------- */
  .post-foot{
    max-width:760px;margin:0 auto;
    padding-top:28px;border-top:1px solid var(--line);
  }
  .related{margin-top:64px;padding-top:40px;border-top:1px solid var(--line);}
  .related-title{
    font-size:20px;font-weight:700;color:var(--ink);letter-spacing:-.01em;
    display:flex;align-items:center;gap:10px;margin-bottom:24px;
  }
  .related-title::before{
    content:"";width:6px;height:6px;border-radius:2px;background:var(--accent);
  }
  .related-grid{
    display:grid;grid-template-columns:1fr;gap:20px;
  }
  @media (min-width:768px){ .related-grid{grid-template-columns:repeat(3,1fr);} }
  .mini-card{
    display:flex;flex-direction:column;
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:var(--radius-card);
    overflow:hidden;
    transition:transform var(--t),border-color var(--t),box-shadow var(--t);
  }
  .mini-card:hover{transform:translateY(-2px);border-color:var(--line-strong);box-shadow:0 8px 24px rgba(14,14,16,.08);}
  .mini-card img{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:0;border:none;}
  .mini-body{padding:16px;display:flex;flex-direction:column;flex:1;}
  .mini-body h3{
    font-size:16px;font-weight:600;line-height:1.5;color:var(--ink);
    display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden;
  }
  .mini-card:hover h3{text-decoration:underline;text-decoration-color:var(--accent);text-decoration-thickness:2px;text-underline-offset:3px;}
  .mini-meta{
    margin-top:12px;padding-top:12px;border-top:1px solid var(--line);
    display:flex;align-items:center;justify-content:space-between;
    font-size:13px;color:var(--ink-mute);
  }
  .tag{
    display:inline-flex;align-items:center;
    height:24px;padding:0 10px;
    border-radius:var(--radius-pill);
    font-size:12px;letter-spacing:.04em;
    background:rgba(201,242,77,.28);
    color:var(--ink);
  }
  .tag-warm{background:rgba(255,106,61,.14);color:#B23A15;}

  /* ---------- 底部 CTA ---------- */
  .cta-band{
    margin-top:96px;
    background:var(--paper-dark);
    color:#F2F0EB;
    padding:96px 0;
  }
  @media (max-width:767px){ .cta-band{margin-top:64px;padding:64px 0;} }
  .cta-band h2{
    font-size:clamp(24px,3vw,38px);
    font-weight:700;line-height:1.2;letter-spacing:-.01em;
    text-align:center;
  }
  .cta-band p{
    margin:16px auto 0;max-width:620px;text-align:center;
    font-size:16px;line-height:1.8;color:rgba(242,240,235,.72);
  }
  .cta-actions{
    margin-top:32px;display:flex;flex-wrap:wrap;justify-content:center;gap:14px;
  }
  .cta-band .btn-ghost{border-color:rgba(242,240,235,.3);color:#F2F0EB;}
  .cta-band .btn-ghost:hover{border-color:#F2F0EB;background:rgba(255,255,255,.06);}

  /* ---------- Footer ---------- */
  .site-footer{
    background:var(--paper-dark);
    color:#F2F0EB;
    border-top:1px solid rgba(255,255,255,.12);
  }
  .footer-title{
    font-size:13px;letter-spacing:.14em;
    color:rgba(242,240,235,.5);
    margin-bottom:16px;
  }
  .footer-link{
    font-size:14px;
    color:rgba(242,240,235,.72);
    transition:color var(--t);
  }
  .footer-link:hover{color:var(--accent);text-decoration:underline;}
  .footer-bottom{
    border-top:1px solid rgba(255,255,255,.12);
    font-size:13px;
    color:rgba(242,240,235,.55);
  }

  /* ---------- 浮动转化 ---------- */
  .float-cta{
    position:fixed;
    right:24px;bottom:28px;
    z-index:80;
    display:none;
    align-items:center;gap:10px;
    padding:13px 22px;
    border-radius:var(--radius-pill);
    background:var(--accent);
    color:var(--ink);
    font-size:14px;font-weight:600;
    box-shadow:0 8px 24px rgba(14,14,16,.16);
    transition:background var(--t),transform var(--t);
  }
  .float-cta.is-show{display:inline-flex;}
  .float-cta:hover{background:var(--accent-deep);transform:translateY(-2px);}
  .float-cta svg{width:16px;height:16px;}
  @media (max-width:767px){
    body{padding-bottom:76px;}
    .float-cta{
      left:0;right:0;bottom:0;
      border-radius:0;
      justify-content:center;
      padding:16px 20px calc(16px + env(safe-area-inset-bottom));
      box-shadow:0 -6px 20px rgba(14,14,16,.16);
    }
  }

  .reveal{opacity:0;transform:translateY(12px);transition:opacity 420ms ease,transform 420ms ease;}
  .reveal.is-in{opacity:1;transform:translateY(0);}
  @media (prefers-reduced-motion:reduce){
    *,*::before,*::after{animation:none!important;transition:none!important;}
    .reveal{opacity:1;transform:none;}
    html{scroll-behavior:auto;}
  }

/* roulang page: category1 */
:root{
  --ink:#0E0E10;
  --ink-soft:#3B3B41;
  --ink-mute:#7A7A82;
  --paper:#F7F5F1;
  --surface:#FFFFFF;
  --paper-dark:#0E0E10;
  --accent:#C9F24D;
  --accent-deep:#A8D62F;
  --accent-ink:#5C7A0A;
  --warm:#FF6A3D;
  --line:rgba(14,14,16,.10);
  --line-strong:rgba(14,14,16,.22);
  --radius-card:14px;
  --radius-pill:999px;
  --radius-img:12px;
  --ease:cubic-bezier(.2,.7,.3,1);
  --t:200ms 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(--paper);
  color:var(--ink);
  font-family:-apple-system,"PingFang SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.75;
  letter-spacing:.01em;
  font-variant-numeric:tabular-nums;
  overflow-x:hidden;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button,input,textarea,select{font:inherit}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px}
::selection{background:var(--accent);color:var(--ink)}

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

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(247,245,241,.88);
  backdrop-filter:blur(6px);
  -webkit-backdrop-filter:blur(6px);
  border-bottom:1px solid var(--line);
  transition:background var(--t),border-color var(--t);
}
.site-header.is-scrolled{background:rgba(247,245,241,.96);border-bottom-color:var(--line-strong)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:14px;height:72px}
@media (min-width:1024px){
  .header-inner{display:grid;grid-template-columns:1fr auto 1fr;gap:16px}
}
@media (max-width:1023.98px){
  .header-inner > .brand:not(.lg\:hidden){display:none !important}
}
@media (min-width:1024px){
  .header-inner > .brand.lg\:hidden{display:none !important}
}
.brand{display:inline-flex;align-items:center;gap:10px}
.brand-mark{width:24px;height:24px;display:grid;place-items:center;color:var(--ink);flex:none}
.brand-mark svg{width:24px;height:24px;stroke:currentColor}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-line-1{font-size:15px;font-weight:800;letter-spacing:-.01em}
.brand-line-2{font-size:11px;letter-spacing:.22em;color:var(--ink-mute)}
.nav-link{position:relative;font-size:15px;font-weight:500;color:var(--ink-soft);padding:6px 0;transition:color var(--t)}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:1px;background:var(--accent);
  transform:scaleX(0);transform-origin:left;transition:transform var(--t);
}
.nav-link:hover{color:var(--ink)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.is-active{color:var(--ink);font-weight:600}
.nav-link.is-active::before{
  content:"";position:absolute;left:0;bottom:-10px;width:22px;height:3px;border-radius:2px;background:var(--accent);
}
.nav-cta{
  display:inline-flex;align-items:center;gap:8px;
  font-size:14px;font-weight:600;color:var(--ink);
  padding:9px 18px;border-radius:var(--radius-pill);
  border:1px solid var(--line-strong);background:transparent;
  transition:border-color var(--t),background var(--t);
}
.nav-cta svg{width:16px;height:16px;transition:transform var(--t)}
.nav-cta:hover{border-color:var(--ink);background:var(--surface)}
.nav-cta:hover svg{transform:translateX(3px)}
.icon-btn{
  width:40px;height:40px;display:grid;place-items:center;flex:none;
  border-radius:var(--radius-pill);border:1px solid var(--line);
  background:transparent;color:var(--ink);cursor:pointer;
  transition:border-color var(--t),background var(--t);
}
.icon-btn:hover{border-color:var(--line-strong);background:var(--surface)}

/* ---------- mobile drawer ---------- */
.mobile-drawer{
  position:fixed;inset:0;z-index:70;
  background:var(--paper);
  display:flex;flex-direction:column;
  padding:16px 20px calc(24px + env(safe-area-inset-bottom));
  overflow-y:auto;
  opacity:0;visibility:hidden;transform:translateY(-8px);
  transition:opacity .18s var(--ease),transform .18s var(--ease),visibility .18s var(--ease);
}
.mobile-drawer.is-open{opacity:1;visibility:visible;transform:none}
.drawer-head{display:flex;align-items:center;justify-content:space-between;height:56px;border-bottom:1px solid var(--line);flex:none}
.drawer-title{font-size:13px;letter-spacing:.16em;color:var(--ink-mute)}
.drawer-nav{display:flex;flex-direction:column;margin-top:6px}
.drawer-link{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  font-size:18px;font-weight:600;color:var(--ink);
  padding:18px 0;border-bottom:1px solid var(--line);
}
.drawer-link.is-active::after{content:"";width:22px;height:3px;border-radius:2px;background:var(--accent)}
.drawer-foot{margin-top:auto;padding-top:26px;flex:none}

/* ---------- breadcrumb / hero ---------- */
.crumb{padding-top:22px;padding-bottom:4px;font-size:13px;color:var(--ink-mute);display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.crumb a{transition:color var(--t)}
.crumb a:hover{color:var(--ink)}
.crumb .sep{color:var(--line-strong)}
.crumb .current{color:var(--ink-mute)}

.cat-hero{padding-bottom:56px;border-bottom:1px solid var(--line)}
.hero-grid{display:grid;gap:32px;align-items:center;padding-top:14px}
@media (min-width:1024px){.hero-grid{grid-template-columns:1.05fr .95fr;gap:56px;padding-top:24px}}
.badge{
  display:inline-flex;align-items:center;gap:8px;height:26px;padding:0 12px;
  border-radius:var(--radius-pill);border:1px solid var(--line-strong);
  background:var(--surface);color:var(--ink-soft);
  font-size:12px;letter-spacing:.04em;line-height:1;
}
.badge--accent{background:rgba(201,242,77,.30);border-color:rgba(168,214,47,.65);color:#41560E}
.badge--warm{background:rgba(255,106,61,.12);border-color:rgba(255,106,61,.42);color:#B33F1C}
.hero-title{
  font-size:clamp(30px,5vw,56px);
  font-weight:800;line-height:1.1;letter-spacing:-.02em;
  margin:20px 0 0;
}
.hero-title .hl{position:relative;display:inline-block}
.hero-title .hl::after{
  content:"";position:absolute;left:0;right:0;bottom:.06em;height:.24em;
  background:var(--accent);z-index:-1;border-radius:2px;
}
.hero-lead{margin-top:20px;font-size:17px;line-height:1.75;color:var(--ink-soft);max-width:560px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.hero-notes{display:flex;flex-wrap:wrap;align-items:center;gap:12px;margin-top:24px;font-size:12.5px;color:var(--ink-mute)}
.hero-notes span.dot{width:1px;height:12px;background:var(--line-strong);display:inline-block}
.hero-media img{
  width:100%;aspect-ratio:16/10;object-fit:cover;
  border-radius:var(--radius-img);border:1px solid var(--line);
}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  min-height:48px;padding:14px 28px;border-radius:var(--radius-pill);
  font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;
  transition:background var(--t),border-color var(--t),transform var(--t),color var(--t),box-shadow var(--t);
}
.btn svg{width:16px;height:16px;transition:transform var(--t)}
.btn:hover svg{transform:translateX(4px)}
.btn-primary{background:var(--accent);border-color:var(--accent);color:var(--ink)}
.btn-primary:hover{background:var(--accent-deep);border-color:var(--accent-deep);transform:scale(1.02)}
.btn-ghost{background:transparent;border-color:var(--line-strong);color:var(--ink)}
.btn-ghost:hover{border-color:var(--ink);background:var(--surface)}
.btn-sm{min-height:40px;padding:10px 20px;font-size:14px}
.link-more{
  display:inline-flex;align-items:center;gap:8px;
  font-size:14px;font-weight:600;color:var(--ink);
  border-bottom:1px solid var(--accent);padding-bottom:2px;
  transition:color var(--t),border-color var(--t);
}
.link-more svg{width:16px;height:16px;transition:transform var(--t)}
.link-more:hover{color:var(--accent-ink)}
.link-more:hover svg{transform:translateX(4px)}

/* ---------- sections ---------- */
.section{padding:58px 0}
@media (min-width:1024px){.section{padding:100px 0}}
.section--tight{padding:44px 0}
@media (min-width:1024px){.section--tight{padding:64px 0}}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:32px}
.section-title{font-size:clamp(23px,3vw,38px);font-weight:700;line-height:1.2;margin:0;letter-spacing:-.01em}
.section-title.with-bar{padding-left:16px;position:relative}
.section-title.with-bar::before{content:"";position:absolute;left:0;top:.18em;bottom:.18em;width:4px;border-radius:2px;background:var(--accent)}
.section-sub{margin-top:12px;font-size:16px;line-height:1.75;color:var(--ink-soft);max-width:660px}

/* ---------- main grid ---------- */
.cat-grid{display:grid;gap:36px}
@media (min-width:1024px){.cat-grid{grid-template-columns:minmax(0,2fr) minmax(0,1fr);gap:48px}}
.entry-list{border-top:1px solid var(--line)}
.entry-item{
  display:flex;align-items:flex-start;gap:16px;
  padding:22px 10px;border-bottom:1px solid var(--line);
  transition:background var(--t),padding var(--t);
}
.entry-item:hover{background:rgba(201,242,77,.12);padding-left:16px}
.entry-main{flex:1;min-width:0}
.entry-title{font-size:18px;font-weight:600;line-height:1.45;margin:0;transition:color var(--t)}
.entry-item:hover .entry-title{color:var(--accent-ink)}
.entry-desc{margin:6px 0 0;font-size:14.5px;line-height:1.7;color:var(--ink-soft)}
.entry-meta{margin-top:10px;display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:12px;color:var(--ink-mute)}
.entry-tag{
  display:inline-flex;align-items:center;height:22px;padding:0 10px;border-radius:var(--radius-pill);
  border:1px solid var(--line);background:var(--surface);font-size:11.5px;letter-spacing:.04em;color:var(--ink-soft);
}
.entry-arrow{width:20px;height:20px;color:var(--ink-mute);flex:none;margin-top:5px;transition:transform var(--t),color var(--t)}
.entry-item:hover .entry-arrow{transform:translateX(4px);color:var(--ink)}

.side-col{display:flex;flex-direction:column;gap:20px}
@media (min-width:1024px){.side-col{position:sticky;top:96px;align-self:start}}
.side-card{
  border:1px solid var(--line);border-radius:var(--radius-card);background:var(--surface);
  padding:22px;
  transition:border-color var(--t),box-shadow var(--t),transform var(--t);
}
.side-card:hover{border-color:var(--line-strong);box-shadow:0 8px 24px rgba(14,14,16,.08);transform:translateY(-2px)}
.side-card-img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--radius-img);border:1px solid var(--line);margin-bottom:18px}
.side-card .badge{margin-bottom:12px}
.side-card h3{margin:0 0 12px;font-size:19px;font-weight:600;line-height:1.4}
.side-text{margin:0 0 14px;font-size:14.5px;line-height:1.75;color:var(--ink-soft)}
.side-list{list-style:none;margin:0;padding:0}
.side-list li{position:relative;padding-left:16px;font-size:14.5px;line-height:1.7;color:var(--ink-soft);margin-bottom:10px}
.side-list li:last-child{margin-bottom:0}
.side-list li::before{content:"";position:absolute;left:0;top:.62em;width:6px;height:6px;border-radius:2px;background:var(--accent)}
.side-meta{font-size:12.5px;color:var(--ink-mute);margin-top:14px}

/* ---------- steps ---------- */
.steps{display:grid;gap:22px}
@media (min-width:768px){.steps{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (min-width:1024px){.steps{grid-template-columns:repeat(4,minmax(0,1fr));gap:24px}}
.step{border-top:2px solid var(--accent);padding-top:18px}
.step-no{font-size:30px;font-weight:800;letter-spacing:-.02em;color:var(--ink);line-height:1}
.step-name{margin:12px 0 8px;font-size:17px;font-weight:600}
.step-text{margin:0;font-size:14.5px;line-height:1.75;color:var(--ink-soft)}

/* ---------- scenes ---------- */
.scene{display:grid;gap:26px;align-items:center}
.scene + .scene{margin-top:44px}
@media (min-width:1024px){
  .scene{grid-template-columns:1fr 1fr;gap:52px}
  .scene + .scene{margin-top:72px}
  .scene--flip .scene-media{order:2}
}
.scene-media{position:relative}
.scene-media img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:var(--radius-img);border:1px solid var(--line)}
.scene-tag{
  position:absolute;top:12px;right:12px;
  display:inline-flex;align-items:center;height:24px;padding:0 10px;
  border-radius:var(--radius-pill);background:rgba(14,14,16,.78);color:#F2F0EB;
  font-size:11.5px;letter-spacing:.08em;font-variant-numeric:tabular-nums;
}
.scene h3{margin:0 0 12px;font-size:clamp(20px,2.2vw,26px);font-weight:700;line-height:1.3}
.scene p{margin:0 0 16px;font-size:15.5px;line-height:1.8;color:var(--ink-soft)}

/* ---------- stats ---------- */
.stat-row{display:grid;grid-template-columns:1fr;border-top:1px solid var(--line)}
.stat{padding:22px 0;border-bottom:1px solid var(--line);display:flex;flex-direction:column;gap:6px}
.stat-num{font-size:30px;font-weight:800;letter-spacing:-.02em;line-height:1;color:var(--ink)}
.stat-num::after{content:"";display:block;width:26px;height:3px;border-radius:2px;background:var(--accent);margin-top:10px}
.stat-label{font-size:13px;color:var(--ink-mute);line-height:1.6}
@media (min-width:640px){
  .stat-row{grid-template-columns:repeat(2,minmax(0,1fr))}
  .stat{padding:24px}
  .stat:nth-child(odd){padding-left:0}
  .stat:nth-child(even){border-left:1px solid var(--line)}
}
@media (min-width:1024px){
  .stat-row{grid-template-columns:repeat(4,minmax(0,1fr))}
  .stat{padding:28px 24px}
  .stat:first-child{padding-left:0}
  .stat:not(:first-child){border-left:1px solid var(--line)}
}

/* ---------- faq ---------- */
.faq-wrap{max-width:820px;margin:0 auto}
.faq-item{border-top:1px solid var(--line)}
.faq-item:last-child{border-bottom:1px solid var(--line)}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:20px 0;font-size:16px;font-weight:600;color:var(--ink);
  transition:color var(--t);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--accent-ink)}
.faq-icon{position:relative;width:16px;height:16px;flex:none;transition:transform var(--t)}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;background:var(--ink);border-radius:2px}
.faq-icon::before{left:0;right:0;top:7px;height:1.5px}
.faq-icon::after{top:0;bottom:0;left:7px;width:1.5px;transition:transform var(--t)}
.faq-item[open] .faq-icon{transform:rotate(90deg)}
.faq-item[open] .faq-icon::after{transform:scaleY(0)}
.faq-answer{padding:0 0 22px;font-size:15px;line-height:1.85;color:var(--ink-soft);max-width:700px}

/* ---------- cta band ---------- */
.cta-band{background:var(--paper-dark);color:#F2F0EB;padding:64px 0;border-top:1px solid rgba(255,255,255,.12)}
@media (min-width:1024px){.cta-band{padding:96px 0}}
.cta-band .cta-title{font-size:clamp(24px,3vw,40px);font-weight:700;line-height:1.2;margin:0;color:#F2F0EB;letter-spacing:-.01em}
.cta-band .cta-sub{margin:16px auto 0;font-size:16px;line-height:1.8;color:rgba(242,240,235,.72);max-width:620px}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;margin-top:32px}
.cta-band .btn-ghost{color:#F2F0EB;border-color:rgba(255,255,255,.28)}
.cta-band .btn-ghost:hover{background:rgba(255,255,255,.08);border-color:#F2F0EB}

/* ---------- footer ---------- */
.site-footer{background:var(--paper-dark);color:#F2F0EB;border-top:1px solid rgba(255,255,255,.12)}
.footer-title{margin:0 0 16px;font-size:12.5px;letter-spacing:.16em;color:rgba(242,240,235,.55)}
.footer-link{font-size:14px;color:rgba(242,240,235,.7);transition:color var(--t)}
.footer-link:hover{color:var(--accent);text-decoration:underline}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);font-size:13px;color:rgba(242,240,235,.55)}
.footer-bottom p{margin:0}

/* ---------- fixed conversion ---------- */
.mobile-cta{
  position:fixed;left:0;right:0;bottom:0;z-index:45;
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  min-height:64px;padding:10px 16px calc(10px + env(safe-area-inset-bottom));
  background:var(--paper-dark);color:#F2F0EB;
  border-top:1px solid rgba(255,255,255,.12);
}
.mobile-cta p{margin:0;font-size:12px;color:rgba(242,240,235,.72);line-height:1.4}
.mobile-cta .btn{min-height:42px;padding:10px 20px;font-size:14px}
@media (min-width:1024px){.mobile-cta{display:none}}
@media (max-width:1023.98px){body{padding-bottom:88px}}
.float-cta{
  position:fixed;right:24px;bottom:28px;z-index:46;
  display:inline-flex;align-items:center;gap:8px;
  padding:13px 20px;border-radius:var(--radius-pill);
  background:var(--ink);color:#F2F0EB;font-size:13.5px;font-weight:600;
  border:1px solid rgba(255,255,255,.16);
  opacity:0;visibility:hidden;transform:translateY(12px);pointer-events:none;
  transition:opacity var(--t),transform var(--t),visibility var(--t);
}
.float-cta svg{width:16px;height:16px;transition:transform var(--t)}
.float-cta.is-visible{opacity:1;visibility:visible;transform:none;pointer-events:auto}
.float-cta:hover{gap:12px}
.float-cta:hover svg{transform:translateX(4px)}
@media (max-width:1023.98px){.float-cta{display:none !important}}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .42s var(--ease),transform .42s var(--ease)}
.reveal.is-in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none;transition:none}
  *,*::before,*::after{animation:none !important;transition:none !important}
}

/* roulang page: category2 */
:root{
  --ink:#0E0E10;
  --ink-soft:#3B3B41;
  --ink-mute:#7A7A82;
  --paper:#F7F5F1;
  --surface:#FFFFFF;
  --paper-dark:#0E0E10;
  --accent:#C9F24D;
  --accent-deep:#A8D62F;
  --warm:#FF6A3D;
  --line:rgba(14,14,16,.10);
  --line-strong:rgba(14,14,16,.22);
  --radius:14px;
  --radius-sm:10px;
  --radius-pill:999px;
  --shadow-hover:0 8px 24px rgba(14,14,16,.08);
  --ease:cubic-bezier(.2,.7,.3,1);
  --dark-line:rgba(255,255,255,.12);
  --dark-text:rgba(242,240,235,.72);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:-apple-system,"PingFang SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",sans-serif;
  background:var(--paper);
  color:var(--ink);
  font-size:16px;
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button{font-family:inherit;font-size:inherit;color:inherit;background:none;border:0;cursor:pointer;padding:0}
ul{margin:0;padding:0;list-style:none}
p{margin:0}
h1,h2,h3,h4{margin:0}
.num{font-variant-numeric:tabular-nums;font-family:Inter,system-ui,-apple-system,sans-serif}

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

/* ---------- 兼容辅助类（不依赖 CDN 也可用） ---------- */
.hidden{display:none!important}
@media (min-width:1024px){
  .lg\:flex{display:flex!important}
  .lg\:hidden{display:none!important}
}

/* ---------- 头部 ---------- */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(247,245,241,.88);
  backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
  transition:background 200ms var(--ease),box-shadow 200ms var(--ease),border-color 200ms var(--ease);
}
.site-header.is-scrolled{background:rgba(247,245,241,.96);border-bottom-color:var(--line-strong);box-shadow:0 2px 12px rgba(14,14,16,.04)}
.header-inner{
  display:grid;
  grid-template-columns:auto 1fr auto;
  align-items:center;
  gap:12px;
  height:72px;
}
.header-inner > .brand{justify-self:center}
@media (min-width:1024px){
  .header-inner{grid-template-columns:1fr auto 1fr;gap:24px}
  .header-inner > nav{justify-self:end}
  .header-inner > div{justify-self:start}
}
.brand{display:inline-flex;align-items:center;gap:10px}
.brand-mark{
  width:30px;height:30px;border-radius:9px;
  display:inline-flex;align-items:center;justify-content:center;
  background:var(--ink);color:var(--accent);
  flex:0 0 auto;
}
.brand-mark svg{width:18px;height:18px;stroke:currentColor}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-line-1{font-size:15px;font-weight:800;letter-spacing:-.01em;color:var(--ink)}
.brand-line-2{font-size:11px;letter-spacing:.22em;color:var(--ink-mute);margin-top:2px}
.nav-link{
  position:relative;
  font-size:15px;font-weight:500;
  color:var(--ink-soft);
  padding:6px 0;
  transition:color 200ms var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:0;bottom:0;height:2px;width:100%;
  background:var(--accent);
  transform:scaleX(0);transform-origin:left;
  transition:transform 200ms var(--ease),height 200ms var(--ease);
}
.nav-link:hover,.nav-link:focus-visible{color:var(--ink)}
.nav-link:hover::after,.nav-link:focus-visible::after{transform:scaleX(1)}
.nav-link.is-active{color:var(--ink);font-weight:600}
.nav-link.is-active::after{transform:scaleX(1);height:3px;width:20px}
.nav-cta{
  display:inline-flex;align-items:center;gap:8px;
  font-size:14px;font-weight:600;
  padding:9px 18px;min-height:40px;
  border-radius:var(--radius-pill);
  border:1px solid var(--line-strong);
  color:var(--ink);
  transition:background 200ms var(--ease),border-color 200ms var(--ease),transform 200ms var(--ease);
}
.nav-cta svg{width:14px;height:14px;transition:transform 200ms var(--ease)}
.nav-cta:hover{background:var(--surface);border-color:var(--ink);transform:translateY(-1px)}
.nav-cta:hover svg{transform:translateX(4px)}
.nav-cta:focus-visible{outline:2px solid var(--accent);outline-offset:3px}
.icon-btn{
  width:42px;height:42px;
  display:inline-flex;align-items:center;justify-content:center;
  border-radius:var(--radius-pill);
  border:1px solid var(--line-strong);
  color:var(--ink);
  transition:background 200ms var(--ease),border-color 200ms var(--ease);
}
.icon-btn:hover{background:var(--surface);border-color:var(--ink)}
.icon-btn:focus-visible{outline:2px solid var(--accent);outline-offset:3px}

/* ---------- 移动抽屉 ---------- */
.mobile-drawer{
  position:fixed;inset:0;z-index:80;
  background:var(--paper);
  display:flex;flex-direction:column;
  padding:20px;
  opacity:0;visibility:hidden;transform:translateY(-14px);
  transition:opacity 180ms var(--ease),transform 180ms var(--ease),visibility 180ms linear;
  overflow-y:auto;
}
.mobile-drawer.is-open{opacity:1;visibility:visible;transform:translateY(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding-bottom:16px;border-bottom:1px solid var(--line)}
.drawer-title{font-size:13px;letter-spacing:.16em;color:var(--ink-mute);font-weight:600}
.drawer-nav{display:flex;flex-direction:column;margin-top:8px}
.drawer-link{
  display:flex;align-items:center;justify-content:space-between;
  padding:18px 2px;
  font-size:18px;font-weight:600;
  border-bottom:1px solid var(--line);
  color:var(--ink);
  transition:color 200ms var(--ease);
}
.drawer-link.is-active{color:var(--ink)}
.drawer-link.is-active::after{content:"";width:18px;height:3px;background:var(--accent);border-radius:2px}
.drawer-link:hover{color:var(--accent-deep)}
.drawer-foot{margin-top:auto;padding-top:24px}
.drawer-foot .btn{width:100%;justify-content:center}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--radius-pill);
  font-size:15px;font-weight:600;
  padding:14px 28px;min-height:44px;
  border:1px solid transparent;
  cursor:pointer;
  transition:background 200ms var(--ease),color 200ms var(--ease),border-color 200ms var(--ease),transform 200ms var(--ease),box-shadow 200ms var(--ease);
}
.btn svg{width:16px;height:16px;transition:transform 200ms var(--ease)}
.btn:hover svg{transform:translateX(4px)}
.btn:focus-visible{outline:2px solid var(--accent);outline-offset:3px}
.btn-primary{background:var(--accent);color:var(--ink)}
.btn-primary:hover{background:var(--accent-deep);transform:scale(1.02)}
.btn-ghost{background:transparent;border-color:var(--line-strong);color:var(--ink)}
.btn-ghost:hover{background:var(--surface);border-color:var(--ink)}
.btn-ghost-light{background:transparent;border-color:rgba(242,240,235,.34);color:#F2F0EB}
.btn-ghost-light:hover{background:rgba(242,240,235,.10);border-color:rgba(242,240,235,.62)}
.btn-sm{padding:10px 20px;font-size:14px;min-height:40px}
.link-arrow{
  display:inline-flex;align-items:center;gap:6px;
  font-size:14px;font-weight:600;color:var(--ink);
  transition:color 200ms var(--ease);
}
.link-arrow svg{width:14px;height:14px;transition:transform 200ms var(--ease)}
.link-arrow:hover{color:var(--accent-deep)}
.link-arrow:hover svg{transform:translateX(4px)}

/* ---------- 徽章 / 标签 ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  height:26px;padding:0 12px;
  border-radius:var(--radius-pill);
  font-size:12px;letter-spacing:.04em;
  border:1px solid var(--line-strong);
  color:var(--ink-soft);
  background:transparent;
}
.badge-accent{background:rgba(201,242,77,.34);border-color:rgba(168,214,47,.7);color:#3E4A0F}
.badge-warm{background:rgba(255,106,61,.10);border-color:rgba(255,106,61,.32);color:#A63A19}

/* ---------- 排版 ---------- */
.title-hero{font-size:clamp(34px,5vw,64px);font-weight:800;line-height:1.08;letter-spacing:-.02em}
.title-section{font-size:clamp(24px,3vw,40px);font-weight:700;line-height:1.2;letter-spacing:-.01em}
.title-sub{font-size:clamp(19px,2vw,24px);font-weight:700;line-height:1.35}
.title-card{font-size:18px;font-weight:600;line-height:1.4}
.text-body{font-size:16.5px;line-height:1.75;color:var(--ink-soft);letter-spacing:.01em}
.text-small{font-size:13px;line-height:1.6;color:var(--ink-mute)}
.text-lead{font-size:17px;line-height:1.7;color:var(--ink-soft)}
.hl{position:relative;z-index:0;display:inline-block}
.hl::after{
  content:"";position:absolute;left:-.06em;right:-.06em;bottom:.06em;height:.32em;
  background:var(--accent);border-radius:3px;z-index:-1;
}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:12px;letter-spacing:.18em;color:var(--ink-mute);font-weight:600}
.rule{height:1px;background:var(--line);border:0;margin:0}

/* ---------- 板块 ---------- */
.section{padding-top:64px;padding-bottom:64px}
@media (min-width:1024px){.section{padding-top:104px;padding-bottom:104px}}
.section-tight{padding-top:48px;padding-bottom:48px}
@media (min-width:1024px){.section-tight{padding-top:72px;padding-bottom:72px}}
.section-head{display:flex;flex-direction:column;gap:14px;margin-bottom:36px}
@media (min-width:768px){
  .section-head{flex-direction:row;align-items:flex-end;justify-content:space-between;gap:32px}
}
.section-head p{max-width:620px}

/* ---------- Hero ---------- */
.hero{padding-top:36px;padding-bottom:56px}
@media (min-width:1024px){.hero{padding-top:56px;padding-bottom:88px}}
.hero-grid{display:grid;gap:36px}
@media (min-width:1024px){
  .hero-grid{grid-template-columns:1.02fr .98fr;gap:56px;align-items:center}
}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--ink-mute);margin-bottom:20px}
.breadcrumb a{transition:color 200ms var(--ease)}
.breadcrumb a:hover{color:var(--ink)}
.breadcrumb .sep{color:var(--line-strong)}
.breadcrumb .current{color:var(--ink-soft)}
.hero-sub{margin-top:20px;font-size:18px;line-height:1.7;color:var(--ink-soft);max-width:480px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.hero-facts{display:flex;flex-wrap:wrap;align-items:center;gap:14px;margin-top:26px;font-size:13px;color:var(--ink-mute)}
.hero-facts .dot{width:1px;height:14px;background:var(--line-strong)}
.media-frame{
  position:relative;border-radius:12px;overflow:hidden;
  border:1px solid var(--line);background:var(--paper);
}
.media-frame img{width:100%;aspect-ratio:16/10;object-fit:cover}
.media-caption{
  position:absolute;left:14px;right:14px;bottom:14px;
  background:rgba(14,14,16,.74);
  color:#F2F0EB;
  border-radius:10px;
  padding:12px 16px;
}
.media-caption .cap-title{font-size:14px;font-weight:700;letter-spacing:.01em}
.media-caption .cap-text{font-size:12.5px;line-height:1.6;color:rgba(242,240,235,.72);margin-top:3px}
.media-tag{
  position:absolute;top:14px;left:14px;
  background:var(--surface);border:1px solid var(--line-strong);
  border-radius:var(--radius-pill);
  padding:5px 12px;font-size:12px;font-weight:600;color:var(--ink-soft);
}

/* ---------- 问题网格 ---------- */
.issue-grid{display:grid;gap:18px}
@media (min-width:640px){.issue-grid{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.issue-grid{grid-template-columns:repeat(3,1fr);gap:22px}}
.card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius);
  transition:transform 200ms var(--ease),box-shadow 200ms var(--ease),border-color 200ms var(--ease);
}
.card:hover{transform:translateY(-2px);border-color:var(--line-strong);box-shadow:var(--shadow-hover)}
.issue-card{padding:26px 24px;display:flex;flex-direction:column;gap:14px;height:100%}
.icon-tile{
  width:42px;height:42px;border-radius:12px;
  background:rgba(201,242,77,.34);
  display:inline-flex;align-items:center;justify-content:center;
  color:var(--ink);
}
.icon-tile svg{width:20px;height:20px}
.issue-card p{font-size:14.5px;line-height:1.7;color:var(--ink-soft)}
.issue-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:12px;padding-top:6px}

/* ---------- 步骤 ---------- */
.step-grid{display:grid;gap:18px}
@media (min-width:768px){.step-grid{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.step-grid{grid-template-columns:repeat(4,1fr);gap:20px}}
.step-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:26px 22px;display:flex;flex-direction:column;gap:12px;height:100%;
  transition:transform 200ms var(--ease),border-color 200ms var(--ease),box-shadow 200ms var(--ease);
}
.step-card:hover{transform:translateY(-2px);border-color:var(--line-strong);box-shadow:var(--shadow-hover)}
.step-num{font-size:13px;font-weight:700;letter-spacing:.18em;color:var(--ink-mute)}
.step-card p{font-size:14.5px;line-height:1.7;color:var(--ink-soft)}
.step-line{height:3px;width:34px;background:var(--accent);border-radius:2px}

/* ---------- 两列文字区 ---------- */
.two-col{display:grid;gap:36px}
@media (min-width:1024px){.two-col{grid-template-columns:1fr 1fr;gap:64px}}
.text-panel h3{margin-bottom:12px}
.text-panel p + p{margin-top:14px}
.check-list{margin-top:18px;display:flex;flex-direction:column;gap:12px}
.check-list li{display:flex;gap:12px;font-size:15px;line-height:1.7;color:var(--ink-soft)}
.check-list .sq{width:8px;height:8px;background:var(--accent);border-radius:2px;flex:0 0 auto;margin-top:9px}
.panel-figure{margin-top:24px;border-radius:12px;overflow:hidden;border:1px solid var(--line)}
.panel-figure img{width:100%;aspect-ratio:4/3;object-fit:cover}
.panel-figure figcaption{font-size:13px;color:var(--ink-mute);padding:10px 2px 0}

/* ---------- 更新说明 ---------- */
.update-box{
  border-top:1px solid var(--line-strong);
  border-bottom:1px solid var(--line);
  padding:30px 0;
  display:grid;gap:16px;
}
@media (min-width:1024px){
  .update-box{grid-template-columns:260px 1fr;gap:48px;align-items:start;padding:36px 0}
}
.update-box .text-body{max-width:760px}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:820px;margin:0 auto}
.faq-item{border-top:1px solid var(--line)}
.faq-item:last-child{border-bottom:1px solid var(--line)}
.faq-item summary{
  list-style:none;cursor:pointer;
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:20px 2px;
  font-size:16px;font-weight:600;
  color:var(--ink);
  transition:color 200ms var(--ease);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--accent-deep)}
.faq-item summary:focus-visible{outline:2px solid var(--accent);outline-offset:4px;border-radius:6px}
.faq-sign{
  position:relative;width:16px;height:16px;flex:0 0 auto;
  transition:transform 200ms var(--ease);
}
.faq-sign::before,.faq-sign::after{
  content:"";position:absolute;background:var(--ink);border-radius:2px;
}
.faq-sign::before{left:0;top:7px;width:16px;height:1.5px}
.faq-sign::after{left:7px;top:0;width:1.5px;height:16px}
.faq-item[open] .faq-sign{transform:rotate(45deg)}
.faq-answer{padding:0 2px 22px;font-size:15px;line-height:1.8;color:var(--ink-soft);max-width:70ch}

/* ---------- CTA 色带 ---------- */
.cta-band{background:var(--paper-dark);color:#F2F0EB;padding-top:64px;padding-bottom:64px}
@media (min-width:1024px){.cta-band{padding-top:96px;padding-bottom:96px}}
.cta-inner{max-width:760px;margin:0 auto;text-align:center;display:flex;flex-direction:column;align-items:center;gap:18px}
.cta-text{font-size:16px;line-height:1.8;color:var(--dark-text);max-width:560px}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;margin-top:10px}

/* ---------- 底部固定转化条 ---------- */
.sticky-bar{
  position:fixed;left:0;right:0;bottom:0;z-index:60;
  display:flex;align-items:center;justify-content:space-between;gap:14px;
  background:var(--paper-dark);color:#F2F0EB;
  padding:10px 20px calc(10px + env(safe-area-inset-bottom));
  min-height:64px;
  transform:translateY(110%);
  transition:transform 240ms var(--ease),opacity 240ms var(--ease);
}
.sticky-bar.is-visible{transform:translateY(0)}
.sticky-text{font-size:12.5px;color:rgba(242,240,235,.78);line-height:1.5}
@media (min-width:1024px){
  .sticky-bar{
    left:auto;right:32px;bottom:32px;
    min-height:0;border-radius:var(--radius-pill);
    padding:8px 8px 8px 22px;
    opacity:0;transform:translateY(16px);pointer-events:none;
  }
  .sticky-bar.is-visible{opacity:1;transform:translateY(0);pointer-events:auto}
}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--paper-dark);
  color:var(--dark-text);
  border-top:1px solid var(--dark-line);
}
.footer-title{font-size:13px;letter-spacing:.16em;font-weight:600;color:rgba(242,240,235,.48);margin-bottom:16px}
.footer-link{
  font-size:14px;color:rgba(242,240,235,.72);
  transition:color 200ms var(--ease);
}
.footer-link:hover{color:var(--accent);text-decoration:underline;text-underline-offset:4px}
.footer-bottom{
  border-top:1px solid var(--dark-line);
  font-size:13px;color:rgba(242,240,235,.5);
}

/* ---------- 入场动效 ---------- */
.js .reveal{opacity:0;transform:translateY(12px);transition:opacity 420ms var(--ease),transform 420ms var(--ease)}
.js .reveal.is-in{opacity:1;transform:none}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  .js .reveal{opacity:1;transform:none;transition:none}
  *{transition:none!important;animation:none!important}
}

/* ---------- 移动端底部预留 ---------- */
@media (max-width:1023px){
  body{padding-bottom:84px}
}